Rolling press and process for making wear-resistant layers

专利摘要:
The invention relates to a roller press, in particular for processing highly abrasive material, which comprises at least two press rollers (1), each provided with a wear-protective layer arranged on a base body (10), the wear-protecting layer (4) comprising (5) and pin-shaped (9) elements of wear-resistant material. The flat elements of wear-resistant material are applied to the surfaces of the opposite edge regions of each base body by sintering with or without pressure, preferably by a step of hot isostatic pressing, and the pin-shaped elements of wear-resistant material are arranged within the central section of each base body. extending between the edge areas. The invention further relates to a method for producing an abrasion protection layer, in particular for a press roll.
公开号:SE537811C2
申请号:SE1350520
申请日:2011-09-29
公开日:2015-10-20
发明作者:Andreas Packeisen；Axel Höfter；Eggert De Weldige
申请人:Köppern Gmbh & Co Kg Maschf；
IPC主号:

专利说明:

The present invention relates to a roller press, in particular for processing high-abrasive material, which comprises at least two press rollers, each provided with a wear-protective layer arranged on a base body layer, wherein the flat-shaped layer and pin-shaped wear-resistant elements. The invention further relates to a process for the production of an abrasion protection layer.
Roller presses of the type in question are used in the state of the art for a large number of different purposes, in particular for compression and crushing. Depending on the profile of the press rollers, the load obtained is not only a compressive load on the materials to be machined but also a sliding load on the surface of the roller. In order to protect the surface of the roller against these loads and the resulting wear, it is an edge that a wear protection can be arranged on the surface. This type of wear protection may comprise, for example, cylindrical hard metal pins, which are very often used in practice and which are arranged in a softer base matrix, these hard metal pins together with the pressed material to be ground forming after autogenous wear protection layers. In the case of such known roller presses, the risk of the pins having to be broken off is very great. Particularly within the edge area of the press roll, there is an increased risk of breakage. This is the reason why the pin-like structure of the surface does not normally continue up to the edge of the press roll, but the edge is protected with additional anti-wear guards. A tankable solution for protecting the edge areas is, for example, mechanically anchored hard metal plates or additional structural soldering. Edge trimming, loosening or flaking if the edge protection occurs, however, occurs during the work even in the case of these additional loosening.
An example of such a known roller press is described, for example, in EP-A-0 516 952. This roller press can more precisely be designed in that a large number of blind hales with pin-shaped pieces of material inserted in them are arranged within the circumferential area of the roller press. The main part of the pin-shaped piece of material is located in the base body of the roller, while the rest protrudes from it. The spaces between the pin-shaped pieces of material protruding from the base body of the roller as the thorns of a hedgehog can be filled with a ceramic material with the addition of plastic. Another solution described in EP-A-0 516 952 has the property that both flat and pin-shaped pieces of material are embedded in the surface area of the roll. In this embodiment, the inserted pieces lie in the same plane as the outer surface of the roll, so no further material can be provided between the inserted pieces.
Another type of wear protection for roller presses has, as described, for example, in DE 942207 U1, the property that wear-resistant plates are applied to the base body, the individual plates having inboard spaces in which a material with another wear resistance is placed. Roller presses designed in this way showed a particularly high wear resistance.
Despite the fact that a large number of different, more or less disadvantageous wear concepts are already used in this area, there is still a need for further improvement of the wear resistance of the rollers, so that the downtime and the subsequent production losses are kept at as low a level as possible. Furthermore, the roller press should be able to be used for all areas of application (compression and crushing), and it should be easy to manufacture.
The present invention is characterized by the technical features contained in the characterizing part of the independent claim 1, a roll press, and the independent claim 15, according to the method for producing an abrasion protection layer.
For a roller press, in particular for processing highly abrasive material, which comprises at least two press rollers, each provided with a wear-protective layer arranged on a base body, this wear-protective layer comprising flat and pin-shaped elements of wear-resistant material, the object of invention is to be achieved. by applying the flat elements of abrasion resistant material to the surfaces of the two opposite edge regions of each press roll by sintering with or without pressure, preferably by a hot isostatic pressing method, and by applying the pin-shaped abrasion resistant components within the section of conventional body extending between the edge areas.
The roller press according to the present invention thus comprises at least two press rollers with different wear protection concepts within the edge area as well as within the intermediate central area of the press rollers, so that the different areas used for press rolling are optimally protected. The use of flat elements of material, which are preferably applied to the roll surfaces by hot isostatic pressing, in combination with the pin-shaped elements of material incorporated in the intermediate central region of the base body thus provides optimal wear protection for a large number of different types of use, and this wear protection can be characterized by high half-strength and short downtime.
Since the flat elements of material in the edge area are preferably applied to the surface by hot isostatic pressing, a bond to the base body of the roll can be obtained, which is so strong that the individual components of the wear layer on the edge can not be detached from it. The frequent problems with breaking loose of the pin-shaped elements or of other wear-protecting components are thus avoided, in particular within the edge areas of the press roll. The use of pin-shaped elements of material within the central area of the press rollers has passed the test for 1 kg of time. 2 537 811 The advantage of hot isostatic pressing is that the greatest possible half-strength between the surfaces can be obtained in this way. Consequently, at least the half-strength of the weaker part among the materials in question will always be obtained.
Furthermore, it has been found that various methods of making press rollers, which will be explained in more detail below, are available, and these methods of manufacture also allow these [Dada concepts of wear protection, which are based on different principles, to be single press roll for a relatively short time and at a reasonable cost.
According to another preferred embodiment, the hard elements arranged in the edge areas may be formed as plates with a predetermined shape, for example square or pentagonal, but preferably hexagonal. This type of pre-determined shape and fixed arrangement of the edge plates provides space for alternating placement of the pin-shaped elements of material between the edge areas and prevents during the work the emergence of a tangent or danger in the circumference due to wear.
The flat elements (5) of wear-resistant material can advantageously be designed as elements in one piece, preferably with an annular shape.
A preferred embodiment may have the property that the edge areas occupy 5 to 25% of the entire surface of the active wear protection layer. This proportion has been found to be useful for preventing the edge areas from breaking loose and thus for ensuring a good condition of the wear-protective layer.
Another preferred embodiment may have the property that the pin-shaped elements of material are hard metal pins or stiff which consist of hard metal-like materials, for example cermet material. These pins have already been shown to be useful in practice for a long time. The production of these pins corresponds to powder metallurgy from the state of the art, so that they can be produced at a comparatively reasonable cost.
According to an advantageous embodiment, the flat elements of material may consist of metal matrix composites with up to 80% by weight of coarse other phases, preferably selected from carbides, bonds and nitrides. These materials have proven to be particularly useful in practice.
Another preferred embodiment may have the property that the rigid elements of material are inserted into the hollow of the base body, preferably removable. The arrangement of the tail determines the arrangement and distribution of the pins on the base body. The pins can thus be inserted relatively easily, and damaged pins can also be easily replaced. If the pins are to be fixed in a non-releasable manner, they can be bonded together with the basic body, for example by means of hot isostatic pressing.
According to a further preferred embodiment, the surfaces of the pin-shaped elements of material and the surfaces of the platform elements of material can be arranged in one and the same plane. The load applied by the material to be processed is thus distributed uniformly over the surfaces. Similarly, materials which have already been machined can be deposited within the areas between the pin-shaped elements of material projecting outside the base surface of the press roll, so that an autogenous wear protection is formed.
Another preferred embodiment may have the property that an additional zone material is arranged on the base body within the section between the edge areas, the surface of this zone material being arranged below the surface of the pin-shaped elements of material or in the same plane as this. The zone material can have a resistance to wear which differs from that of the pin-shaped and platform elements of material, so that the frame with different properties of the wear protection is obtained. The pins can be completely embedded in the zone material or protrude outside it. The zone material can preferably be applied by hot isostatic pressing. The zone material preferably consists of a metallic or metal-ceramic powder material or of a powder-like material. If the zone material or rather the surface of the zone material is to be arranged below the surface, the pin-shaped elements can be machined mechanically, i.e. its diameter can be reduced, so that the predetermined height of the zone material is obtained before the pin-shaped elements of material are arranged. Suitable subsequent mechanical processing has proved useful, as it makes it possible to apply both the plate-shaped elements of material and the zone material in a single working step with hot isostatic pressing, so that the process can be optimized with respect to the time access. In this context, it has been found that the zone material should preferably have a half-strength which enables subsequent mechanical processing.
A preferred embodiment of the invention has the property that within the edge area the diameter of the basic body can be reduced to a predetermined matt pre-application of the flat-shaped elements of material, so that at least one step is obtained. After the application of the flat elements of material, these can extend in the same plane as the original diameter of the base body or protrude beyond the original height of the edge areas. It is such that, depending on the requirements to be met for the specific field of application, the flat elements of material can be made at any height, but without protruding beyond the surface, the basic surface of the future component has longer than the pin-shaped elements. of material provided for the surface between the edges. If the edge is formed with a step-shaped depression, the deeper step should be formed directly next to the side surfaces of the base body. The side surfaces of the base body can thus be protected by arranging additional wear-protecting elements. These additional elements are preferably arranged below the planar elements of material.
According to another preferred embodiment, the basic body of the press rollers may consist of at least two basic body segments, which define a closed ring and which are releasably arranged on basic elements. On the one hand, it becomes possible, if parts of the wear-protective layer were to be enlarged, to restore the base body of the press roll p5 in a particularly uncomplicated manner by a simple replacement of parts, and on the other hand the base layer can be produced easily even in the case of comparatively large diameters of the press rollers.
According to another embodiment, the wear-protecting layer can be applied to a closed bandage forming the base body, this closed bandage being arranged on the basic element 5 of the roller so that it engages in a form-fitting or frictional manner therein and is connected to this basic element. On the basis of this structural design, the individual wear elements can be arranged on the base body with comparatively little effort. Particularly in the case of a shrink-fitting bandage, the formation of cracks caused by shrinkage seals can be avoided by a suitable adjustment of the material in question.
According to another embodiment, further wear elements can be arranged in the side surfaces of the basic body below the flat elements of wear-resistant material in receiving openings formed in these side surfaces. This enables further protection of the side surfaces of the base body, so that the wear resistance of the press roll as a whole increases significantly.
According to an advantageous embodiment, the wear protection elements on the sides can be designed as flat elements, and their respective shape or design can be chosen depending on what is required, eg rings, plates, polygonal elements etc. suitable wear protection elements by hot isostatic pressing.
A further embodiment of the present invention has the property that the basic body of the press rollers consists of a plurality of rings, which are arranged on a basic element of the press roll so that they engage in a shaped or frictional manner therein, the respective edge regions each formed by a separate ring, the circumference of which flat elements of material are provided. This embodiment can be characterized by a particularly simple manufacturing method for the press roll, since the individual elements in the press roll, i.e. both the edge areas and the central area, only need to be pressed into place. This also leads to a significant time saving during maintenance and repair.
The process used according to the present invention for producing an abrasion resistant layer, in particular for a roll press used for processing highly abrasive material, comprises the following steps: a) flat elements of highly abrasion resistant material, which have been produced by sintering, CIP or HIP, or bulk powder comprising at least one component is applied to the edge areas of a base body of the press roll; b) the flat elements of material and / or the bulk powder comprising at least one component are applied to the base body as edge elements, preferably by hot isostatic pressing (HIP); 537 811 hal is produced in the section of the base body which is arranged between the edge elements; and pin-shaped elements of highly wear-resistant material are inserted into the produced tails, so that these elements protrude beyond the surface of the base body and their surfaces extend in the same plane as the surface of the edge elements.
This process can be characterized by a very small number of process steps and thus by efficient and rapid preparation. This also makes it possible for the production costs to be kept as low as possible.
This basic procedure can be modified by incorporating additional preferred experimental steps. In order that the individual modified sequences of procedure steps be clearly specified, even with regard to their chronology, all individual procedure steps, even those already mentioned in advance, will be listed within the description of the procedures given below.
Another preferred method thus comprises the following steps: a) the base body of the press roll is mechanically machined in advance so that a flat surface is obtained; b) the flat, highly abrasion resistant material, produced by sintering, CIP or HIP, is applied to the two opposite edges of the pre-mechanically machined base body; c) the intermediate gaps between the flat elements of highly wear-resistant material are filled with a wear-resistant material with one or more components (intermediate gap material); d) the section of the base body between the edge areas is filled with a wear-resistant material with one or more components (zone material); e) the flat elements of material, the zone material and the intermediate gap material are applied to the base body, preferably by hot isostatic pressing, so that the surfaces of the edge elements formed by the flat elements of material, of the zone material and of the intermediate gap material extend substantially in one plane; hal is produced in the zone material between the edge elements and Oven in the base body of the press roll, and pin-shaped elements of highly wear-resistant material are inserted into the formed Mien, preferably in such a way that these elements extend in the same plane as the edge elements and the zone material.
This procedure differs from the basic procedure by an additional step for the preparation of the basic body. This preparatory mechanical machining can be achieved, for example, by turning or by mechanically machining the base body in some other way. Furthermore, the intermediate gaps between the individual platform 6,537,811 elements are filled with materials which are arranged within the edge areas and also with wear-resistant material with one or more components, the so-called intermediate gap material. The material in the intermediate gaps may have wear resistance which differs from that of the flat elements of material, so that the outer circumference provides wear protection with other wear properties, so that different loads can be efficiently handled. Similarly, the section of the base body between the edge areas, i.e. the central area, can be filled with abrasion resistant material with one or more components (zone material). Regarding this zone material, it should preferably have a wear resistance that differs from that of the flat, highly wear-resistant material, preferably a wear resistance which enables further mechanical processing of the zone material, for example by means of turning. Thus, the height of the zone material can be changed after the application of the individual elements of material, so that a p5 predetermined matt is obtained.
In this context, the zone material should preferably be mechanically machined in such a way that the obtained surface of the zone material ends up lower than the surface of the edge elements to a predetermined extent, so that the pin-shaped elements of highly abrasion resistant material are arranged in the tail on a sac: of the pin-shaped elements of material extends beyond the surface of the zone material and preferably extends in the same plane as the surface of the edge elements. Material finishes thus accumulate between the individual pins, whereby the wear layer is also affected.
According to another preferred method of the present invention, the following steps comprise: a) the basic body is prepared by making regularly placed depressions on the sides in the opposite edge areas of the basic body, b) the flat elements of highly abrasion resistant material or a bulk powder comprising at least one component the edge edges of the base body, when appropriate, fill the intermediate gaps between the flat elements of highly abrasion resistant material and the depressions with a powdered, abrasion resistant material with one or more components (intermediate gap material), the flat elements of material and / or the bulk powder comprising at least one component is applied to the base body, preferably by hot isostatic pressing (HIP), when appropriate, the section between the edge areas is mechanically machined to reduce the diameter of the section extending between the edge areas in such an extension. in that the obtained surface will be lower than the surface of the edge elements to a predetermined extent, after the hot isostatic pressing or the reduction of the diameter of the section between the edge rows is made slippery in the section of the base body which is between the edge rows; pin-shaped elements of highly wear-resistant material have been inserted into the produced Mien, so that these elements protrude beyond the surface of the base body and their surface extends in the same plane as the surface of the edge elements.
This method comprises the step of systematically producing in the edge area of the base body of depressions on the sides, which extend up to and into the side surfaces of the base body, i.e. the depressions end at the side surfaces of the base body and are designed so that they are open at the sides and open at the top. These depressions, which are arranged at regular intervals, may in turn have inserted flat elements of material or inserted bulk powder. If flat elements of material are used, the intermediate gaps between the individual flat elements and the cradles of the recess can also be filled with a powdered material, so that the recess is completely filled. Application of the elements of material and of the powdered material or bulk powder then takes place by means of hot isostatic pressing.
A desired wear protection, adapted to the needs within the respective area of use, can thereby be effectively obtained by choosing the shape of the recess.
A further method comprises the following steps: a) the diameter of the base body of the press roll is reduced within the range of the two opposite edge ranges to a predetermined extent; b) a highly wear-resistant material is applied to the edge areas of the base body in the form of a bulk powder comprising at least one component, so that a flat and continuous edge element is formed; c) when appropriate, an identical or other bulk powder comprising at least one component is applied, so that a flat and continuous section is formed between the edge areas (zone material); the bulk powder comprising at least one component is arranged on the edge areas with reduced diameter and when suitable on the section between the edge areas, preferably by hot isostatic pressing; after the hot isostatic pressing, the zone material is partly deposited, when appropriate, in the sections between the edge areas, so that the obtained surface ends up lower than the surface of the continuous edge area to a predetermined extent; after the hot isostatic pressing or after the deposition of the zone material, hl is produced in the section of the base body which is located between the edge areas; and pin-shaped elements of highly wear-resistant material are inserted into the produced Mien, so that the surface of these elements extends in the same plane as the surface of the continuous edge elements and in the same plane as the surface of the zone material, or extends beyond the surface of the zone material.
Except in the case of the previously described modifications of the method, the diameter of the base body is reduced only to a predetermined extent within the area of the two opposite edge areas, i.e. the two edge areas are formed as steps. In this area with reduced diameter, a highly wear-resistant material is applied in the form of a bulk powder, which gives a coherent, flat edge element by means of a further process, in particular by hot isostatic pressing.
This method thus leads to the formation of a continuous edge zone, i.e. the procedure can be carried out more quickly, since it is not necessary to arrange individual platform elements side by side on the base body. The properties of the edge zone can then be adjusted efficiently by proportionally selecting the powder materials.
Thus, if the area between the edge zones is to be filled with the same material, even this step can be considerably simplified, since the powder mixture can be applied to the areas within one step, and since also the compression and bonding to the base body is carried out in a single step of hot isostatic pressing. .
The edge element can in this case be limited exclusively to the area of reduced diameter, or it can also extend outside the surface of the base body, i.e. above the surface of the intermediate central area of the base body. Similarly, a bulk powder can be applied to this central area, which preferably has a different wear resistance.
A further advantageous method may have the property of further depressions Or formed in the side surfaces of the base body, which Or are adapted to accommodate further wear elements. These additional wear elements Or are arranged below the edge elements.
In this way, the diameter of the base body can be reduced in size by two different diameters within the area of the two opposite edge areas, whereby the reduction of the diameter of the two press rollers within the area of the two opposite edge areas takes place in two steps, i.e. the first reduction of the diameter of the two the press rollers are followed by a second reduction in the diameter of the press rollers exclusively within the section immediately adjacent to the side surfaces. The surface of the edge areas which are immediately adjacent to the sides of the base body is thus located lower than the surface of the previously mechanically machined edge areas to a predetermined extent.
After this, the depressions in the side surfaces can be filled within a first step. This filling can be carried out with flat-shaped segments, powder or other suitable elements. When this is done, the filling can be carried out only up to the surface of the sunken edge areas, or also, in the case of a powder, the entire depression in the side surfaces as well as in the edge areas can be filled.
In the case of all the processes described above, the hot isostatic pressing can also be replaced by sintering with or without pressure.
In summary, it can thus be stated that with the aid of sintering with or without pressure an intimate connection is obtained between the individual materials, regardless of whether the material in question is used in the form of a pre-produced element or in the form of powder.
According to another preferred embodiment, the platform elements of material may be hard elements, produced by a sintering process or cold or hot isostatic pressing. Likewise, the elements of material can also be obtained by casting procedures. Furthermore, these elements of material can also be produced, for example, by rolling or pressing, in particular at high heating rates. By manufacturing in advance of suitable flat elements of material, the time required for the actual manufacturing process on the press rolls can be significantly reduced. Night sintering or isostatic pressing is possible. It is also possible to use different types of powder according to selected breaths, a combination of the properties of the different types of powder and consequently a concrete adjustment of the individual hard elements for the intended area of use.
In summary, it can be stated that the above specific procedures offer the advantage that the wear protection layer can be applied in different ways, which are easy to carry out. Furthermore, by changing some process parameters or material parameters, the wear protection layer can be designed to have completely different wear properties. In this way, the wear protection layer p5 of the press roll can be adapted exactly to the materials to be processed.
The flat elements of wear-resistant material can advantageously be produced, before they are applied to the basic body, in the form of flat hard elements by cold or hot isostatic pressing or by a sintering process. This enables the hard elements to be designed with the desired shape and the desired profile.
Likewise, the flat elements of wear-resistant material can be formed into the desired shape directly on the edge regions of the base body by means of a single step with hot isostatic pressing and bonded together with these edge regions.
In the following, embodiments of the present invention will be described in more detail with reference to a drawing, in which the following grid: Figure 1 shows in the form of a partial side view a press roll for a roll press, where the edge areas of the base body have a reduced diameter. Figures 2a and b show in the form of a partial side view and a view, respectively, of the press roll shown in Figure 1 after application of flat elements of material and after insertion of wear-resistant powder which fills the intermediate gaps.
Figure 3 shows in the form of a partial side view the press roll shown in Figures 1 and 2 after hot isostatic pressing and further mechanical processing in order to obtain a flat surface.
Figure 4 shows in the form of a side view the press roll shown in Figures 1 to 3 after carrying out a reduction of the diameter within the area between the edge areas and after the production of hay.
Figure shows in the form of a side view the press roll shown in figures 1 to 4 after insertion of pin-shaped elements of material in the tail.
Figures 6a to f show in the form of a side view an alternative method for producing a press roll according to the invention.
Figure 7 shows a view from above of a detail of the basic body of a press roll, after the formation of pit-like depressions in the edge areas, these edge areas being such according to another embodiment.
Figures 8a to 8c show in the form of a sectional view a further variant for manufacturing the press roll according to the present invention.
Figures 9a and b show in the form of a sectional view a press roll produced according to a further method, where further depressions on the sides are provided.
Figures 9c to 9g show side views of the further depressions on the sides of the press rollers according to Figures 9a and 9b.
Figure shows a sectional view through another variant of a press roll. Figure 11 shows a sectional view through another variant of a press roll.
Figure 1 shows the base body 10 of a press roll 1, the base body being formed as a bandage. The basic body can also be designed as a solid body. As can be seen, the diameter of the base body has been reduced to a predetermined extent within the area of the! Dada opposite edges 2, i.e. section 3 of the base body, which extends between the! Dada edge areas 2, protrudes beyond the edge areas 2 in a bridge-like manner.
This reduction in diameter can be achieved by known procedures, for example by turning the base body. The depression formed in the edge areas already defines the width of the edges, so that the shape of the wear-protective layer can no longer be changed.
After this, a wear-protective layer is applied to the sunken edge areas 2, which consists of powder metallurgically produced, highly wear-resistant, flat elements of material 5, and of a wear-resistant powder material 6 with one or more components which fill the intermediate gaps. The wear behavior of the materials selected may be adapted to the properties of the material to be processed. Ideally, the materials used for the elements of material 5 and for the gaps 6 have different wear patterns, so that a surface profile is formed within the edge area of the press roll during work. The platform elements of materials may be pre-fabricated by HIP, CIP, sintering procedures or, if desired, other procedures, and their height may extend beyond the bridge-shaped section 3 which has been pre-fabricated by mechanical processing.
The elements of material 5 may also have been provided in the form of previously produced flat hard elements, which have been produced by hot isostatic pressing. In the following, the terms "element of material" and "hard element" are used as synonyms, and they will both be denoted by the reference numeral 5. The flat hard elements 5 are arranged on the edge areas of the press roll in the same manner as tiles, and then the obtained intermediate ones are filled. gaps with a wear-resistant powder material 6. The plates preferably have such a shape that they cover the edge areas almost completely, i.e. in particular with a continuous edge on the duck edges of the base body, and with the advantage also that they end at the end of the depression formed at the edge areas 2. For this purpose, the hard elements can be placed so that they go against each other like mosaic pieces, so that a suitable result is obtained. The use of individual hard elements not only makes it possible to use elements of different shapes in order to obtain a suitable result, but it is also possible to determine the size and number of intermediate gaps depending on the respective area of use.
Thereafter, both the hard elements and the intermediate material are attached to the base body 10 by hot isostatic pressing. Diffusion zones, via which the individual materials are firmly bonded to each other, are thus formed at the places where the material in the hard elements and the intermediate gap material come into contact with the base body, as well as at the places where the material in the hard elements and the intermediate gap material come into contact. In this way, the wear behavior of the edge areas can be adapted to the properties of the material to be processed.
Materials which have been found to be useful for the hard elements as well as for the intermediate gaps are, for example, highly wear-resistant powder metallurgical materials, which may also contain, for example, components of the ceramic type.
Figure 3 shows the condition of the base body of the roller after hot isostatic pressing. Both the hard members 5 and the intermediate gap material 6 are firmly bonded to the base body in this condition. In the design shown in Figure 3, the intermediate gap material 6 has been completely deposited within the area of the bridge-shaped section 3. However, this is only a preferred embodiment.
Depending on the intended area of use, the intermediate gap material 6 may also still be present or may have been only partially removed. When hot isostatic pressing has been carried out, the section 3 extending between the edge areas 2 or the flat-shaped elements of material 5 arranged thereon can be machined mechanically in order to obtain a reduction in the diameter of the section 3. Figure 4 shows the basic body after carrying out this reduction of the diameter. This reduction of the diameter can be carried out, for example, by pit grinding. As is clear from Figure 4, section 3, which extends between the edge areas or elements of material 5, defines a trough-like depression 7. The surface of section 7 is located lower than the surface of the elements of material 5 to a predetermined extent. Through this submerged area, hall 8 is made on the edge set, and these halls are used for accommodating rigid, highly wear-resistant elements.
A finished press roll 1 is shown in Figure 5. Pin-shaped, highly wear-resistant elements 9 now extend into the slides provided in the base body 10. The shark has such a mat that the main part of the pin-shaped elements extends into the base body 10, while only a small part of the pin-shaped body 9 protrudes beyond the surface. In the finished state, the surface of the pin-shaped elements of material 9 is preferably arranged in the same plane as the surfaces of the hard elements 5. In all the embodiments described, the pins 9 can be arranged detachably in the Mien, so that pins that shave wear or damaged can be replaced with new pins at any time.
Likewise, the pins can of course also be anchored in a non-releasable way. The pins are also preferably designed as hard elements, and they may consist of metal matrix components with up to 80% by weight of coarse additional phases, preferably selected from carbides, borders and nitrides, or of hard metal or hard metal-like materials (eg cermet material).
During the work, material is to be processed between the individual pins and also between the pins and the edge areas, and the wear-resistant layer is supported on this.
According to another embodiment, the intermediate gap material, i.e. the surface of the intermediate gap material, can also extend in the same plane as the surface of the hard elements. In this case, the pins are completely countersunk, i.e. the surface of the pins extends in the same plane as the surfaces of the hard elements and of the intermediate gap material. The stiffeners according to this embodiment are completely embedded in the basic body and in the intermediate gap material.
In contrast to the above methods, the highly wear-resistant, flat elements of material 5, which have previously been produced, for example, by HIP, CIP or sintering methods, can also be applied directly to the surface of a base body 10 which has been previously planarized, i.e. the diameter of the base body 10 has no steps formed in it but remain unchanged. This type of embodiment is shown in Figure 6a. In a further process step, a wear-resistant powdery material 6 with one or more components is then applied to the intermediate gaps between the applied flat elements of material 5, which correspond to the hard elements, as well as to the space formed between the edge surfaces (cf. also Figure 6b). The whole arrangement is then treated with HIP, so that not only the hard elements but also the whole powdered material, including the powdered material located between the hard elements, are bonded together internally and with the surface of the base body.
When hot isostatic pressing has been performed, the surface of the base body 10 is defined by the hard elements 5 arranged in the edge areas 2, including the intermediate gap material 6, and by a surface layer provided by the powdered material, as shown in Figure 6c.
When the base body is prepared for insertion of the pin-shaped elements of highly abrasion-resistant material, and for the formation of a corresponding slip, the surface section 3 between the edge regions, which consist of the hard elements and the intermediate gap material, must first be reduced to a predetermined extent to the edge areas 2. The material can then be deposited on the edge set, for example by pit grinding (figure 6d).
Then the tail 8 of the pin-shaped elements is made of material 9. Figure 6e shows that these hales can extend through the surface layer 3 down to and into the base body 10. The last step (Figure 6f) shows the base body after the pin-shaped elements of material 9 have continue into the holes 8. Also in this case the surface of the pin-shaped elements of material 9 extends in the same plane as the surface of the hard elements 5 which are arranged in the edge areas.
Apart from the case of the embodiments described above, the edge areas of the basic body can also be designed as structured surfaces. It is possible, for example, by conventional mechanical processing, for example cutting, to form regularly shaped depressions 12 on the sides in the opposite edge areas, these depressions defining pit-like openings. This type of embodiment is shown in Figure 7. The flat elements 5 of highly abrasion resistant material which have been produced by sintering, CIP or HIP, or bulk powder comprising at least one component, can then be fitted into the formed pits 12. The shape of the pits 12 shown is only an example p5 an embodiment. The contour of the pit can also be square, pentagonal, hexagonal or polygonal, and it can also be round or rounded.
When the flat elements 5 of highly wear-resistant material, which have been produced by sintering, HIP or CIP, have been fitted, the intermediate gaps between the elements and the pit-like openings 12 can be filled with a wear-resistant material with one or more components, the intermediate gap material. The further manufacturing steps then correspond to those described above, i.e. the flat elements of material 5 and / or the bulk powder are applied to the base body 10 with HIP within a further pre-processing step. After hot isostatic pressing, hal 8 can be produced and pin-shaped elements 9 can be fitted, in analogy to the methods described above.
Figure 8 shows a further embodiment, in which the diameter of the base body 10 is first reduced to a predetermined extent by mechanical machining within the area of the opposite edge areas 2, as shown in Figure 8a, i.e. p5 in the same way as in the first described embodiment. In contrast to the case in the first embodiment, a high-grade wear-resistant material is applied in the form of a bulk powder 13, which comprises at least one component, instead of the flat elements of material 5, which gives a flat and continuous edge zone 14, cf. 8b. The powder mixture can then be applied in such a way that it is not only applied in the interior of the depressions in the edge areas but also on the bridge-shaped section 3 between the depressions, so that a uniform surface, consisting of the bulk powder 13, is obtained on the whole base body.
After the application of the bulk powder 13 p5 the edge regions 2 with reduced diameter and / or the section 3 between the edge regions, the material is bound to the base body 10 by hot isostatic pressing. Thereafter, the bridge-shaped section 3 between the edge areas 2, as previously described for the preceding embodiments, is subjected to pit grinding, so that the surface of this area ends up lower than the surface of the surface formed by the bulk powder with a component. Darp5, h518 can be made and pin-shaped elements 9 fitted in analogy to the methods described above.
One of the advantages of forming the powder mixture over the entire base body is evident from the fact that a uniform surface is obtained on the press roll, so that the powder mixture is not limited to only the previously formed depressions in the edge areas. The desired height can thus be obtained more easily during the filling step.
The embodiments described above can also have extra wear protection within the area of the sides of the press rollers. In this case, it has been found to be particularly advantageous if the opposite edge areas, which have a reduced diameter, have a step shape, i.e. a deeper sunken area 15 is formed immediately adjacent the sides of the base body, this area 15 passing through the normal depression via a second step. This deeply submerged area can be used to accommodate a side guard.
Preferably, the side guard 16 extends only up to the first step, i.e. after the insertion of the side guard, the now filled, deeply sunk area extends only up to the surface of the edge region 2 with reduced diameter of the press roll. The additional wear protection is consequently applied partly to the surface of the base body 10 and partly to the surface of the side protection 16, so that a particularly good bonding and consequently stability of the individual elements is obtained.
The side guard as such can then be applied as a whole in the form of a fixed ring (Figure 9c), or it can also be applied divided in the form of fixed segments or segments produced by HIP, CIP or sintering methods (Figure 9d). Furthermore, the wear protection elements for side guards can also be applied in the form of plates which have a circular cross-section or a multi-sided cross-section and which have also been produced by HIP, CIP or sintering methods (Figure 9e, Figure 9f). The side can also be provided with a highly wear-resistant powder material with one or more components (Figure 9g), which can also be used as an intermediate gap material for the flat or tiled elements. The elements of material in the side guard and the wear protection elements on the surface, which have been described in the different variants of the preceding embodiments, are all applied to the press roll by hot isostatic pressing.
The production of hall 8 in the base body 10 and the insertion of pin-shaped elements 9 of highly wear-resistant material in the manufactured holes 8 takes place after the hot isostatic pressing in analogy with the previously described methods, so that these elements protrude beyond the surface of the base body 10 and are located in the same plane as the surface of the flat elements of material 5.
As shown in Figure 10, the side guard can also be made in the form of two rings 10 ', which are attached to both side ends of the base body 10, provided with slippery and with pin-shaped elements 9 of highly wear-resistant material. In analogy to the previously described methods, the pin-shaped elements 9 can protrude beyond the surface of the base body 10, and they can be in the same plane as the surface of the platform elements of material 5 ', which Or arranged on the rings 10'. nevertheless, the flat elements of material 9 can also be belted into the tail and placed in the same plane as the flat elements of material 5 'which Or placed on the thin discs. In analogy to the methods described above, the flat elements of material 5 'can be attached to the rings by HIP, CIP or sintering methods with or without pressure or by soldering methods. Furthermore, the rings 10 'can be made in such a way that they consist entirely of powder metallurgically produced material, or they can also be made as a basic body with a powder metallurgical coating. On the basis of the described solution an overall working width is obtained with the press roller, which sum of the width has the base body 10 provided with pins and the width has the side protective rings 10 'which are provided on both sides. The thickness has the side protective rings provided on each side of the base body Or per ring 1.5 to 15% of the entire working width of the press roll.
Another embodiment of the press roll is shown in Figure 11. This embodiment also comprises two rings 10 ', which Or are arranged on the side surfaces of the rings 10'. The dead rings 16 537 811 10 'have the same height as the surface of the rings 10', so that the rings 10 'define a common surface. In analogy to the embodiment described above, the flat elements of material 5 'are arranged on the rings 10' and project beyond the surface of the base body 10.
As previously described, slides are provided within the area of the ring 10 '. In these halls pin-shaped elements of material 9 are arranged, i.e. they are arranged p5 in such a way that they are either completely sunk in the Mien or protrude beyond the surface of the base body 10. The surfaces of the platform elements of material 5 'as such can be arranged, as shown to the left in Figure 11, in the same plane as the pin-shaped elements of material 9, or also, as shown to the right in Figure 11, they may extend beyond the surface of the pin-shaped elements of material 9, i.e. the surface of the pin-shaped elements of material 9 is arranged lower than the surface of the flat-shaped elements of material 5 'in this case. The various structural configurations of the planar elements of material 5 'on the rings 10' shown are for explanatory purposes only. In use, the two opposite rings 10 'have an identical structural design. 17

权利要求:
Claims (19)
[1]
Roller press, in particular for processing highly abrasive material, which comprises at least two press rollers (1), each provided with a wear protection layer arranged on a base body (10), this wear protection layer (4) comprising flat (5) and pin-shaped (9) elements of wear-resistant material, the flat elements of wear-resistant material being arranged on the opposite edge areas of each base body and the pin-shaped elements of wear-resistant material Or arranged within the section of the press roll extending between the edge areas, marked by that the flat elements of wear-resistant material are designed as plates with a square, pentagonal or hexagonal contour and are applied to the surface of the base body by a step of hot isostatic pressing.
[2]
Roll press according to Claim 1, characterized in that the edge areas (2) occupy 5 to 25% of the entire surface of the active wear-protective layer.
[3]
Roller press according to claim 1 or 2, characterized in that the flat elements of material (5) consist of metal matrix composites with up to 80% by weight of coarse additional phases, preferably selected from carbides, bonds and nitrides, and / or that the pin-shaped elements of material (9) consists of hard metal or of hard metal-like materials, such as cermet materials.
[4]
Roller press according to one of Claims 1 to 3, characterized in that the pin-shaped elements of material (9) are inserted, preferably detachably, into a slide (8) in the basic body.
[5]
Roller press according to any one of claims 1 to 4, characterized in that the surfaces of the pin-shaped elements of material (9) and the surfaces of the flat-shaped elements of material (5) are arranged in one and the same plane.
[6]
Roll press according to any one of claims 1 to 5, characterized in that between the edge areas there is an additional zone material whose surface Or is arranged lower than the surface of the pin-shaped elements of material or in the same plane as this.
[7]
Roll press according to any one of claims 1 to 6, characterized in that within the range of the edges (2) the diameter of the base body (10) is reduced to a predetermined extent for the application of the flat elements of material (5) to give one step, and in that the planar elements of material (5) extend beyond the original height of the edge areas (2).
[8]
Roll press according to any one of claims 1 to 7, characterized in that the basic body of a conventional press roll (1) consists of at least two basic body segments, which define a closed ring and which are arranged on a basic element. 18 537 811
[9]
Roll press according to any one of claims 1 to 8, characterized in that the wear-protecting layer (4) is applied to a base body formed as a closed bandage, which is arranged on a basic element of the press roll (1) so that it engages in a form-fitting or frictional manner in this and which is connected to the basic element.
[10]
Roll press according to any one of claims 1 to 9, characterized in that further wear elements are arranged in the side surfaces of the base body below the flat elements of wear-resistant material in receiving openings formed in these side surfaces.
[11]
Roller press according to Claim 10, characterized in that the side protection elements are designed as flat elements.
[12]
Roll press according to any one of claims 1 to 7, 10 and 11, characterized in that the basic body of the press rollers consists of a plurality of rings (10 '), which are arranged on a basic element having the press roll so that they engage in a shaped or frictional manner therein, wherein the respective edge areas (2) are each formed by a separate ring (10 '), on the circumference of which the flat elements of material (5') are arranged.
[13]
Roll press according to claim 12, characterized in that the rings (10 ') have the same height.
[14]
Roller press according to Claim 12 or 13, characterized in that the surface of the flat elements of material (5) is arranged above the surface of the pin-shaped elements of material (9).
[15]
A method of making an abrasion resistant layer, in particular for a roll press used for machining highly abrasive material, comprising the steps of: 1. the base body of the press roll is mechanically pre-machined to obtain a flat surface; 2. Platform elements of highly abrasion-resistant material, which have been produced by sintering, CIP, HIP, casting or rolling or pressing or by sintering with or without pressure are applied to the [Dada opposite edge regions of the pre-mechanically machined base body; 3. the intermediate gaps between the flat elements of highly wear-resistant material are filled with a wear-resistant material with one or more components (intermediate gap material); 4. the section of the base body located between the edge areas is filled with a wear-resistant material with one or more components (zone material); 5. the flat elements of material, the zone material and the intermediate gap material are applied to the base body, preferably by hot isostatic pressing, so that the surfaces of the edge elements formed by the flat elements of material, of the zone material and of the intermediate gap material extend substantially in one and the same plan; 19 537 811 6. slippery material is produced in the zone material which is arranged between the edge elements as well as in the basic body of the roller press, and 7. pin-shaped elements of highly wear-resistant material are inserted into the produced Mien.
[16]
A method according to claim 15, characterized in that after the hot isostatic pressing, the zone material located between the edge elements is machined mechanically to reduce the diameter, so that the obtained surface of the zone material is lower down to the surface of the edge elements to a predetermined extent. , the pin-shaped elements of highly abrasion-resistant material being arranged in the fabricated Mien in such a way that the surface of the pin-shaped elements of material extends beyond the surface of the zone material.
[17]
Method according to Claim 15 or 16, characterized in that further depressions are produced in the side surfaces of the base body under the edge elements to be applied, so that further wear elements can be accommodated.
[18]
A method according to claim 17, characterized in that the diameter of the base body is reduced in size by two different diameters within the area of the [Dada opposite edge areas, wherein the diameter of the area immediately adjacent to the side surfaces is reduced more than the closely spaced edge area, to accommodate the side shields. the elements within the area for the side surfaces.
[19]
Method according to one of Claims 15 to 18, characterized in that the wear resistance of the zone material differs from the wear resistance of the edge elements. 537 811 1/537 811 21 LCD C, .. 6 LL. co 6 LL 537 811 3/537 811 4/02! ° C3 C.0 537 811 5/537 811 6 / a-3 co (6 LL. 537 811 Ii iv 537 811 8 / ° C3 0, d 53 a) 0, C_6 U- 537 811 9 / "st, N • 537 811 10 / 1.0 .. **: ... :::. • r

类似技术:

---

公开号 | 公开日 | 专利标题

---

SE537811C2|2015-10-20|Rolling press and process for making wear-resistant layers

---

CA2800194C|2017-05-30|Composite chute liner

---

CN100509292C|2009-07-08|Multi-layer cutter blade and manufacturing method thereof

---

RU2536903C2|2014-12-27|Long element-insert for grinding roll composed of two materials

---

AU2013231612B2|2017-08-17|Press roll for a roll press

---

KR20170095390A|2017-08-22|Drill ring for core drill bit

---

DE69909506T2|2004-06-09|PROCESS FOR PRODUCING SINTERED PARTS

---

CA2767048C|2015-12-15|Wear-resistant attachments for high-wear applications

---

GB2559422A|2018-08-08|A method of repairing a grinding parts used in a roller mill and to grinding parts so repaired

---

DK2825316T3|2017-07-17|Press roller

---

DE102006029259A1|2007-02-15|Stump grinding wheel and grinding strips for these

---

CA2908016A1|2014-10-16|Ceramic chute liner

---

EP2445637A1|2012-05-02|Wear-resistant roller

---

EP2418057B1|2016-02-10|A mould container part provided with a sealing device, and method for application thereof

---

KR102229917B1|2021-03-22|Cutting tip and manufacturing method thereof

---

KR20150145230A|2015-12-29|Ceramic chute liner

---

TW201330979A|2013-08-01|Wear-resistant roller

---

EP2335827A1|2011-06-22|Insert arrangement, wear surface structure for a jaw of a jaw crusher, jaw crusher and use of wear surface structure

---

EP2377677B1|2016-04-13|Pelletizing tool and method for manufacturing same

---

AT507931B1|2011-01-15|GRINDING TOOL

---

SE538225C2|2016-04-05|System for a crushing plate

---

GB2315238A|1998-01-28|Biscuit making roller

---

SE528828C2|2007-02-27|Rider bar for surface of screen cloth or wear-resistant lining, includes wear-resistant element partially embedded in rider bar

---

MX2008007930A|2008-09-02|Components of a steelworks, such as a continuous casting installation or a rolling mill, method for producing such a component and installation for creating or processing semifinished metallic products

同族专利:

---

公开号 | 公开日

---

DE202010013735U1|2012-01-13|

---

WO2012052110A1|2012-04-26|

---

JP2014500130A|2014-01-09|

---

US20130284840A1|2013-10-31|

---

DE102010052935B4|2016-07-14|

---

SE1350520A1|2013-06-20|

---

DE102010052935A1|2012-03-29|

---

JP5971600B2|2016-08-17|

引用文献:

---

公开号 | 申请日 | 公开日 | 申请人 | 专利标题

---

---

US412558A|1889-10-08|Surface for grinding and crushing |

---

US2210357A|1936-02-27|1940-08-06|Beament Thomas Geoffrey|Composite wear-resisting body|

---

JPH0220686B2|1985-07-03|1990-05-10|Kubota Ltd|

---

JPH0239939B2|1986-12-09|1990-09-07|Ai Enu Ji Shoji Kk|

---

DE4036040C2|1990-02-22|2000-11-23|Deutz Ag|Wear-resistant surface armor for the rollers of roller machines, especially high-pressure roller presses|

---

DE4132474A1|1991-05-28|1992-12-03|Kloeckner Humboldt Deutz Ag|WEAR-RESISTANT GRINDING ROLLER FOR USE IN ROLLING MACHINES, ESPECIALLY IN HIGH PRESSURE ROLLING PRESSES|

---

DE59407047D1|1993-07-20|1998-11-12|Koeppern & Co Kg Maschf|ROLL PRESSES, IN PARTICULAR FOR THE CRUSHING OF STRONG ABRASIVE SUBSTANCES|

---

DE9422077U1|1993-07-20|1998-01-22|Koeppern & Co Kg Maschf|Roller press, especially for crushing highly abrasive substances|

---

US5967431A|1996-03-18|1999-10-19|Astec Industries, Inc.|Rock crusher having crushing-enhancing inserts, method for its production, and method for its use|

---

DE19638237A1|1996-09-19|1998-03-26|Deutz Ag|Wear-resistant surface armor for the rollers of high-pressure roller presses for pressure reduction of granular goods|

---

DK1077087T3|1999-08-14|2003-08-04|Kloeckner Humboldt Wedag|Grinding roll and method for its preparation|

---

FI110520B|2001-03-16|2003-02-14|Metso Paper Inc|Abrasive element and grinding stone|

---

DE10354679A1|2003-11-22|2005-06-30|Khd Humboldt Wedag Ag|Grinding roller for the crushing of granular material|

---

DE102005027729A1|2005-06-16|2006-12-28|Khd Humboldt Wedag Gmbh|Roll crusher for breaking hot cement clinker|

---

US20120048976A1|2009-04-20|2012-03-01|Hofmann Engineering Pty Ltd.|Pressure roller|

---

US8308096B2|2009-07-14|2012-11-13|TDY Industries, LLC|Reinforced roll and method of making same|

---

DE102009039928B3|2009-08-17|2011-03-03|Khd Humboldt Wedag Gmbh|Roll press screen armoring with ring-shaped bolts and method for renewing the reinforcement of this grid armor|

---

CA2784643C|2009-12-18|2017-04-04|Metso Minerals Ab|Bimaterial elongated insert member for a grinding roll|

---

US8281473B2|2010-04-23|2012-10-09|Flsmidth A/S|Wearable surface for a device configured for material comminution|

---

JP2012091137A|2010-10-28|2012-05-17|Mitsubishi Materials Corp|Apparatus for fracturing polycrystalline silicon and method for producing fractured fragment of polycrystalline silicon|

---

CA2823354A1|2010-12-29|2012-07-05|Flsmidth A/S|Crushing body and method of making the same|DE102012102192B4|2012-03-15|2020-01-23|Maschinenfabrik Köppern Gmbh & Co. Kg|Press roller for a roller press|

---

DE102012102199A1|2012-03-15|2013-09-19|Maschinenfabrik Köppern GmbH & Co KG|press roll|

---

JP2014004545A|2012-06-26|2014-01-16|Furukawa Industrial Machinery Systems Co Ltd|Crusher and production method for crushed product|

---

US9815119B2|2012-07-31|2017-11-14|Flsmidth A/S|Method for producing a wear-resistant roller component|

---

CN102896013B|2012-09-26|2015-05-27|成都利君实业股份有限公司|Roller mill and self-synchronizing wearing roller of high-pressure roller mill|

---

US9492827B2|2013-05-01|2016-11-15|Us Synthetic Corporation|Roll assemblies including superhard inserts, high pressure grinder roll apparatuses using same, and methods of use|

---

EP2940169A1|2014-04-30|2015-11-04|Sandvik Intellectual Property AB|A wear resistant component and a device for mechanical decomposition of material provided with such a component|

---

CN104190497A|2014-09-17|2014-12-10|南京凯盛国际工程有限公司|Novel hexagonal armor roller surface for roller press|

---

DE102016200912A1|2016-01-22|2017-07-27|Thyssenkrupp Ag|Wear protection element for a shredding device|

---

DE102019127655A1|2019-10-15|2021-04-15|Hueck Rheinische Gmbh|Press tool and method of making a press tool|

---

RU199756U1|2020-01-30|2020-09-18|Общество с ограниченной ответственностью «Техноинком»|Roll band of vertical roller mill|

法律状态:
2020-05-05| NUG| Patent has lapsed|

优先权:

---

申请号 | 申请日 | 专利标题

---

DE202010013735U|DE202010013735U1|2010-09-29|2010-09-29|roll press|

---

DE102010052935.4A|DE102010052935B4|2010-09-29|2010-11-30|roll press|

---

PCT/EP2011/004878|WO2012052110A1|2010-09-29|2011-09-29|Roller press|

---