西班牙专利ES2652516A2 Multi-wire machine for cutting blocks of stone and wire tensioning device

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专利摘要:
Multi-wire machine for cutting blocks of natural or artificial stone comprising: rings of diamond wire (2) driven in their cutting motion (M) by a driving drum; a pair of wire-guiding rollers (5), upstream and downstream of the cutting section (7), for determining in the cutting section the correct position of the single wire on the block of stone being processed; a tensioning device of the rings of diamond wire with at least one movable support (18) of a single tensioning member (12) for each ring of diamond wire; and having the tensioning device (9) subdivided into a first tensioning means (10) for large movements, that is to say, intended to put in tension the rings of diamond wire (2) in assembly-maintenance, and a second tensioning means, single for each wire, for the fine tensioning of each diamond wire (2) closed in a ring; both the first and second tensioning means being made oscillating on respective oscillation pins (11, 13, 14) connected to the supporting structure (4); the second tensioning means (12, 18) being subdivided into groups (15, 16) in an alternated way, corresponding to the wires they support, even (22) in one group and odd (21) in the other group; finally, said second fine tensioning means are spatially alternated in the groups (15, 16) and those of one group (15, 16) penetrates each other, in the space present between adjacent tensioning means (12, 18) of the other group (15, 16), and between adjacent diamond wires (21, 22) of the other group, in the various tensioning positions which each of the second means (12, 18) assumes in tensioning.
公开号:ES2652516A2
申请号:ES201790021
申请日:2015-11-02
公开日:2018-02-02
发明作者:Giambattista PEDRINI；Sergio BARAGETTI
申请人:Pedrini Spa Ad Unico Socio；
IPC主号:

专利说明:

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oscillating tensioning means on the respective oscillation pins connected to the support structure; the second tensioning means being subdivided into groups alternately, corresponding to the supporting threads, even in one group and odd in the other group; finally, said second fine tensioning means alternate spatially in the groups and those of one group penetrate each other, in the space present between the adjacent tensioning means of the other group, and between the adjacent diamond wires of the other group, in the various tensioning positions that each of the second means assumes the tension.
Further, in an improved embodiment: the first tensioning means comprises a roller or drum mounted on an oscillating support such as an upper recoil roller after the horizontal or subhorizontal return section in the path of each diamond wire ring.
Furthermore, in a preferred embodiment: the second tension means comprise a multitude of pulleys, which are oscillated by a respective oscillating support, and which are intended to fine-tune a respective diamond wire closed in a ring, placed immediately before, in the cutting movement of the diamond wire, of the thread guide roller upstream of the block being processed.
In addition, in a further embodiment: in the path of each diamond wire ring, the members in contact with the wire are limited to five, that is, they include the drive drum, the two wire guide rollers and the thread roller. diamond of the first tensioning means and a pulley of the second tensioning means.
In addition, in a specific embodiment: each oscillating support has a complete pin with a single pulley, which is applied on it; and in which the pin of a pulley is made in two halves, with labyrinths corresponding to concentric labyrinths present in the pulley bushing, said bushing being also made in two halves.
In addition, an improved embodiment provides: the application of the pin and the pulley on the oscillating support comprising a seat with fixing elements and threaded holes made on an added intermediate element, which becomes replaceable if necessary.
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Brief description of the drawings
Figure 1 is a schematic general front view of a multi-threaded machine with diamond wires for cutting a block of natural or artificial stone, provided with a tensioning device for tensioning the wires described in the invention, comprising the first tensioning means for large movements and the second precise tensioning means; Figure 2 is a schematic perspective view limited to the tensioning device of the multi-threaded machine of Figure 1, in which the single fixed roller and the moving means can be seen with the trajectory of the multitude of diamond wires highlighted; Figure 3 is a schematic perspective view limited to the tensioning device of the multi-threaded machine of the previous figures, in which the paths of the diamond wires in support of the only precise tension pulleys for each thread can be seen, constituting the second means tensioners; Figure 4 is a schematic enlarged side view of the tension pulleys subdivided into two groups and interposed between the diamond wires in the section affected by the tension between the upper subhorizontal return branch and the horizontal cutting section, which occurs between two rollers for guiding diamond wires known in the art; Figure 5 is a schematic side view of the tensioning device with the fine tensioning pulleys of each wire of the two groups and interposed between the diamond wires with a short ring development with respect to the average development accepted by the multi-wire machine; Figure 6 is a schematic side view of the tensioning device with the fine tensioning pulleys of each wire of the two groups and interposed between the diamond wires with a longer ring development than the average development accepted by the multi-wire machine; Figure 7 is an enlarged schematic representation of a section between the swing pins of the individual support arms of some thin tension pulleys of the device, in relation to both groups, interposed with each other in a generic and intermediate position of the tension stroke. ; Figure 8 is an enlarged schematic representation of a section of some thin tensioning pulleys of the device, in relation to a single group,
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coating of each slot separated from the roller portion.
Detailed description of a preferred embodiment
In Figures 1 and 2, with the multi-thread cutting machine, 1 indicates the machine as a whole in which the diamond wire rings 2 are subtended, displaced in their cutting movement M by a drive drum 3, comprising a vertically movable support structure 4 that supports the elements of the machine 1, to perform the movements of raising and lowering the threads on the block of stone to be cut, which is not shown here. The threads in their lower path are guided by thread guide rollers 5 of the type known in the lower cutting section 7, while in the upper section 8, of the subhorizontal return path of the diamond wire rings 2, they are free and are supported, at the opposite end to the drive drum 3, by the thread tensioning device 9 according to the invention. The tensioning device 9 is constituted in its upper part by a roller or oscillating drum 10 in a pin 11, which constitutes the first tensioning means, with a horizontal position, which provides the movement of large displacements in the tensioning of all the thread rings diamond, and under said drum, of the only pulleys 12, which constitute the second tensioning means, supported in oscillation on the horizontal pins 13 and 14, since they are subdivided into two groups 15 and 16, in such a way that they affect the rings of diamond wire 2 alternately subdivided into the two groups in the section between said oscillating drum 10 and the upstream thread guide roller 5, in the movement M of the wires, of the lower cutting section 7 of the diamond wires. The oscillation for tensioning the oscillating roller 10 is carried out by pushing the hydraulic cylinders 17, while each pulley 12 and oscillating support 18 are pushed by a respective hydraulic cylinder 19.
Figures 3 and 4 show the subdivision into two groups 15 and 16 of the diamond wires to be tensioned, subdivided as pulleys 12 into odd wires, group 15, and even wires, group 16. In their oscillating motion, the supports oscillating 18 and the respective pulleys 12 are positioned in extreme conditions, as can be seen in figures 5 and 6, when the diamond wire rings 2 are shorter than the average development in the machine, as in figure 5, that is to say , the pulleys of one group penetrate, interposed, in the pulleys of the other group, until they approach the pin 20 of the other pulleys; or, when the rings of the diamond wire 2 are longer than the average development in the machine, as can be seen in Figure 6, the pulleys of one group extend to minimize penetration with the pulleys of the other group; furthermore, in this case, the penetration between them is maximum between the diamond wires 21 or 22 of one group and the pins 20 of the other group of pulleys 12. Such penetration between pulleys and between pulley pins and diamond wires can also be observed in the Figures 7 and 8. In Figure 9, then, the constitution of a pin 20 of a pulley can be seen, in which each pulley 12 is housed in rotation on its oscillating support 18, by means of pin 20, and is provided with a bushing in two halves 23 and 24 to tighten the inner edge 27 of the pulleys with the screws 28 in the bearing 29, located for rotation between the pin 20 and the pulley 12. The oscillating support 18 is also made in two halves 30 and 31, which are tightened with screws 32. The pin 20 of each pulley 12 is also made in two halves 33 and 34 that penetrate each other with the bushing in two halves of the pulley including the support for the rotation of said bearing 29 yu n labyrinth 35, correspondingly present in both halves and also in the two halves of bushing 23 and 24 of the pulley; the two halves of the pin 20 are tightened in position by the screw 36, which is axially housed to the pin.
In the following figures 10 and 11, the constitution of the connection and the tightening of the two halves of the pin 20, when assembled complete with the pulley 12, can be seen in the two halves 30 and 31 of the oscillating support 18. The two halves of the pin 20 are brought into contact with the oscillating support 18 in the plane 37, as can also be seen in Figure 9, of the contact of said two halves with the two halves of said oscillating support. The pin 20, complete and mounted on the pulley, is housed in situ in the two respective halves of the oscillating support 18 by the guide of the inclined seats 38 present laterally with respect to the support plane 37, by the additional guide of an element of fixing 39 and are tightened with the screws 40, two in each half 33, 34 of the pin, and in engagement in the threaded holes 41, made, in a very advantageous manner, added with an intermediate element 42 housed and tightened to the support plane 37 on the respective oscillating support half 30 or 31 and towards the corresponding half 33 or 34, of the pulley rotation pin.
Furthermore, in Figures 12 to 16, a new specific and advantageous constitution of the oscillating tension roller 10 can be seen in which an oscillating support 43 of the roller
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sliding between the parts that constitute the grooves in the drum. Therefore, the solution of limiting the threads that are present in a roller part to eight makes it possible to moderate the contrasting effects of higher maintenance costs if a roller consisting of individual pulleys, one per thread, is adopted compared to a solution of construction in which more than eight threads are present in the same part of the roller that can rotate freely; that is, the more threads coincide in the same part of the roller, the greater the difference in speed between the threads can be, while only in the drive drum 3 have a perfect synchrony, although in all other contacts, on rollers and pulleys , the difference depends on the behavior of the thread in the cut and on its development of beginning of the length of the ring. Therefore, in the individual pulleys, like the pulleys 12 of the tensioning device 9, there can be no damage because the pulley follows the speed of the supported thread, while in the parts of the roller 45, the speed of the threads , although slightly different, it is compensated by a sliding of the threads with greater speed, that is to say, that they are longer or have been extended more in section with respect to the adjacent threads. Therefore, by limiting the threads supported by a single roller part 45 of the oscillating roller 10 to eight, it is possible to minimize reciprocal sliding between the threads without generating excessive construction and maintenance costs.
Furthermore, in the specific constitution of the represented oscillating roller 10, each groove 46, in addition to being coated with a soft material ring 53, is constructed on arcuate sectors 49, in a minimum number of two or more, with the only limit of the greatest cost, taking into account that each arcuate sector 49 has a side 50 with a large radius in order to move the groove 46 away from the external surface 51 of the roller part 45 to avoid damage due to the vibrations of the diamond wires subtended in the subhorizontal section 8 of the upper path of the diamond wire rings 2. When a diamond wire, which crosses said subhorizontal section 8 goes into vibration, the latter affects the contact surface of the wire at the end of this section, that is, damages the groove 46 in which it is present in the winding of the oscillating roller 10, the action is hammering and increases with each subsequent turn of the roller, so that the damage it is obtained in a short time and to put the machine back under normal cutting conditions, it is necessary to stop it and replace the slot involved.
In the prior art, said replacement refers to the roller and the specific groove involved with the need to disassemble the entire roller to replace the groove.
or damaged grooves.
By means of the solution proposed in the present invention, the maintenance intervention in case of damage to a groove 46 can take place in two ways. A first way is to disassemble the specific rotating part of the roller 45, removing it from the oscillating pin 44 and intervening in the groove in the workshop, being able, after replacing the rotating part of the roller 45, to restart the machine and carry out the Keep calm later. A second way of maintaining the single groove 46, subject to damage, occurs by separation before the arcuate sector involved 49: the damage is always concentrated at a single point on the periphery of the groove, so that the intervention of dismantling the The arc sector involved 49 can also be carried out with the oscillating roller 10 mounted on the machine, in such a way that specific and rapid maintenance is carried out without intervening on the multitude of diamond wires of the machine and considerably limiting the intervention time and the consequent stoppage. of the machine for the replacement of the arched sector. The arrangement of the fixing screws 52 of each sector must be at a minimum number of three screws per sector and with a radial direction as an impediment to the centrifugation of the arcuate sector if the damage completely affects a screw head 52.
The advantages of the multi-threaded machine for cutting stone blocks with the wire tensioning device described above are many, although they can be summarized with a simplification of construction, adopting machine parts that perform oscillatory movements to tension the diamond wires, and an embodiment of these parts that allow their safe operation for the purpose of the movement required also in the presence of a surrounding environment that is contaminated by the water used for cutting, by the stone particles detached in the cut and by diamond dust to The grinding of the cut of the diamond inserts, whose contamination, as is known, tends to impede the movements of the parts of the machine involved.
In addition, the simplification of the construction with the limitation of the contacts of the diamond wire ring in its trajectory allows to maintain the long life of the wire
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Replacement-repair parts are thus minimized. In conclusion, machine costs, in addition to construction, are also minimized for periodic maintenance and for extraordinary maintenance.
Obviously, in the realization of a multi-threaded machine for cutting stone blocks and a thread tensioning device, as described above, a person skilled in the art can apply the characteristics described with the variants he deems appropriate, but all included in the claims. attached.
In fact, the roller or oscillating recoil drum, made in the specific constitution in free parts of rotation or with grooves supported by removable arcuate sectors, can also be used with non-oscillating devices, that is, in a fixed position, but provided with specific characteristics of realization in the free rotating parts of the roller, in which a plurality of threads of more than two are present in the same free rotating roller part; furthermore, said roller can be provided with arcuate sectors, at least two for each groove, one side having a large thickness to compensate for an anomalous damage due to the possible vibration of the supported diamond wire. Finally, in a construction variant of the recoil drum or roller (10), the latter is connected in rotation in a fixed position to the support structure (4) of the guide and / or support and drive elements of the diamond wire rings and is associated with any known tensioning device of the wire rings, obviously different from what has been described above.
In addition, the arrangement of the tensioning elements, the first and second tensioning means, although less conveniently, may be different from that shown, that is, with said means placed in sequence or subdivided in the path of the diamond wire ring.
Therefore, in practice, the materials, sizes, execution details may be different from those indicated, but technically equivalent to these, without departing from the protection domain of the following claims.

权利要求:
Claims (1)
[1]
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引用文献:

公开号 | 申请日 | 公开日 | 申请人 | 专利标题

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DE10232667A1|2002-07-18|2004-02-12|Wacker Siltronic Ag|Wire saw and process for separating discs from a workpiece such as a semiconductor has tension equalizer for wires having cutting particles|

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WO2010128903A1|2009-05-04|2010-11-11|Husqvarna Ab|A wire saw and a method of rebuilding a wall saw to a wire saw|

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ES2387375B1|2010-11-26|2013-07-26|Nodosafer S.L.|MULTIPLE DIAMONDED THREAD TENSIONING DEVICE FOR CUTTERS OF STONE MATERIALS|

WO2012143956A1|2011-04-19|2012-10-26|Pelmine S.R.L.|Machine for multiple wire cutting of stone material|

EP2628558A1|2012-02-15|2013-08-21|Applied Materials Switzerland Sàrl|Diamond wire saw device and method|

ITFI20120078A1|2012-04-20|2013-10-21|Gaspari Menotti S P A|"MACHINE FOR CUTTING STONE AND SIMILAR BLOCKS"|WO2019042604A1|2017-08-29|2019-03-07|Catalini Carlos Alberto|A cutting machine with diamond pearls wires for cutting blocks of natural or artificial stone|

法律状态:
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优先权:

申请号 | 申请日 | 专利标题

ITMO2014A000317|2014-11-03|

ITMO20140317|2014-11-03|

PCT/IT2015/000262|WO2016071936A1|2014-11-03|2015-11-02|Multi-wire machine for cutting blocks of stone and wire tensioning device|

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