• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a bending press (1), in particular a press brake, for forming a sheet metal workpiece, comprising a machine frame (2) with two mutually spaced side cheeks (3, 4), a fixed lower pressing beam (5) and an adjustable upper pressing beam (8). on which cooperating bending tools can be arranged, one with the machine frame (2) and the upper clamping bar (8) coupled adjusting drive (10), in particular with hydraulic cylinders (27). The side cheeks (3, 4) are plate-shaped and formed with O-recesses (22) and arranged parallel to each other and the upper press bar (8) is at least partially between two the side cheeks (3, 4) connecting upper cross members (6, 7) , According to the invention, the lower pressing beam (5) below the center of the O-recesses (22) is connected to the side cheeks (3, 4) and lateral end portions (23) of the upper pressing beam (8) are each above the center of the O-grooves (22 ) guided by means of the side cheeks (3, 4) arranged guide elements (24).
    公开号:AT515153A1
    申请号:T50796/2013
    申请日:2013-12-04
    公开日:2015-06-15
    发明作者:
    申请人:Trumpf Maschinen Austria Gmbh；
    IPC主号:
    专利说明:

    The invention relates to a bending press according to the preamble of claim 1.
    Machine frames of bending presses, especially press brakes, comprise for the most part side cheeks in the form of C-stands, whereby not only on the user side front side but also laterally a large space for Flandhabung of workpieces and tools is given. A disadvantage of this design is that at high forming forces a bending of the C-stands takes place and thereby the upper beam experiences a slight inclination from the working plane and thereby bending inaccuracies can occur on machined workpieces.
    To reduce such caused by a stator bending bending inaccuracies, it is known to perform bending presses with a so-called O-frame, ie to provide side cheeks, which have an O-recess. Such a construction is known for example from DE 41 38 286 A1. A disclosed therein bending press has to increase the bending accuracy and to avoid bending errors due to the deflection of the pressing beam on a two-part, upper beam and a special suspension of the lower press beam. However, the structural complexity of such a bending press design is considerable and further requires a complex assembly of the press beams or their components.
    The object of the invention is to provide a bending press, which has a simple structure and further causes a low installation cost.
    The object of the invention is achieved by a bending press with the features of claim 1, wherein the design with side cheeks with O-recesses, as known from the prior art, a fundamentally higher rigidity of the machine frame and thus a higher bending accuracy than in bending presses is effected with side cheeks in the form of C-stands. The fact that the side cheeks extend both in front of and behind the working plane between the lower beam and the upper beam, unlike C-stands in the side walls with the O-recesses hardly bending moments and learns the upper beam at high loads no angular misalignment.
    The fact that the lower beam is connected below the middle of the O-recess with the side cheeks and lateral end portions of the upper beam are each guided above the center of the O-grooves by means arranged on the side cheeks guide elements, it is ensured that both the lower beam as Also, the upper beam even at high forming forces remain substantially exactly in the working plane and bending inaccuracies can be kept low even with comparatively weak dimensioned component cross-sections. The assembly of the bending press is facilitated due to the lighter-sized, lighter components.
    The connection of the lower press beam with the side cheeks is preferably formed by a welded joint. The at least partially arranged between the two connecting the side cheeks, upper cross beams arranged upper beam is located by the lateral guide on the side cheeks substantially exactly in the working plane, which is why hereby the bending accuracy is increased.
    As guide elements in this case guide rails or guide rollers may be provided, which cooperate with suitable guide elements or guide surfaces and are arranged either on the upper press beam or on the side walls.
    An advantageous embodiment consists in that the upper pressing beam has at its end portions guide surfaces, which are guided substantially free of play between arranged on the side cheeks guide rollers. The guide rollers have horizontal and parallel to the vertical working plane of the bending press roller axes. The guide surfaces on the upper pressing beam preferably extend to approximately to the inner sides of the side cheeks, whereby a flying attachment of the guide rollers is possible, since they only have to protrude in this case a short length relative to the inside of the side cheek. For example, the distance of the end portion of the upper press beam from the inside of the side cheek is about 6 mm and the guide rollers have an axial length of, for example, 22 mm. The total length of the upper press bar can be greater than a working length on the underside of the upper press bar, which is provided for receiving bending tools. For a further increase in bending accuracy, it may be provided that the lower pressing beam has side slits extending from its lateral end portions towards its middle portion and terminate before this and that the lower pressing beam between its top and its central portion has an approximately horizontally extending central slot with in this effective, height-adjustable actuators, in particular in the form of hydraulic cylinders having. This embodiment of the lower press beam allows it to slightly lower in the region of the lateral end portions under the influence of a forming force and that the central region can be slightly raised by activating the actuators, thereby actively achieving a convex overall shape of the lower press beam.
    Since the upper pressure bar occupies a concave overall shape under the influence of forming forces and lateral arrangement of the adjusting drives, it is possible that despite a load-dependent Du rchbiegung the upper press beam, a bending work piece is uniformly formed over its entire length, as a constant immersion depth of an upper tool in Shape of a stamp can be ensured in the lower tool in the form of a die. The middle section of the lower press beam is located approximately half height and half width of the overall dimension of the lower press beam.
    The portion of the lower press beam remaining above the center slot is less rigid as compared to adjacent portions, but is supported by the actuators that are not activated such that the top of the lower press beam is horizontal over the length of the lower press beam without the application of forming forces runs. The remaining above the center slot cross-sectional height of the lower press beam is preferably less than 30% of the total beam height. For example, with a total height of the lower pressing beam of a rectangular basic shape of 850 mm above the central slot, a cross-sectional height of, for example, 200 mm remains, which constitutes a proportionate height of approximately 25% of the total height.
    A structurally simple embodiment may consist in that the lower pressing beam has an approximately rectangular basic shape and the side slits are arranged in the middle third of the total height of the lower press beam and are performed starting from lateral end portions towards the middle section flat sloping. By this embodiment, the lower pressing beam from the comparatively rigid central part has an outwardly increasing compliance, whereby the upper side of the lower press beam undergoes deformation during the forming of large or long workpieces, which largely corresponds to that of the upper press beam and results over the Bending length seen a substantially constant immersion depth of the punch into the bending die.
    The actuators in the central slot can be individually controlled to produce the desired convex curvature of the upper side of the lower press beam, for example, wherein either a predetermined change in height is made to each actuator or a predetermined adjusting force is adjusted. Alternatively, it is possible that all actuators exert the same force, for example by actuators in the form of identical hydraulic cylinders are all driven with the same hydraulic pressure, which adjusts an equal force on all actuators and the
    The top of the lower press bar above the actuators is pressed against the underside of the upper press bar with approximately constant force.
    The side slits and center slits are an intentional weakening of the mechanical rigidity of the lower beam, but the resistance to change of the lower beam can be adversely affected by a notch effect caused by such slits. It is therefore an embodiment of advantage in which the side slits and the central slot are rounded at their ends and in particular, in relation to the slot width on at least double dimension enlarged, rounded recesses go. The notch effect at the ends of the slots is very small by this measure and thus the slots are not detrimental to the fatigue strength of the lower beam.
    A substantial facilitation of the assembly of the bending press can be achieved if the adjusting drive has an upwardly oriented support surface which contacts a downwardly oriented mating surface of a support member detachably connecting the upper cross member. In contrast to the designs mostly used, in which the adjustment is supported on inextricably linked to the machine frame, in particular welded components, this embodiment allows that the support element is placed only after the start of machine assembly in its position, which can greatly facilitate the assembly process. So it can be made possible, for example, to position the upper beam together with the adjustment in the machine frame, and only then to fasten the support elements on the machine frame. This possibility of introducing the press beam together with the adjusting drive from above into the machine frame is not practicable in the case of support elements which are permanently connected to the machine frame and it is thus easier to assemble the bending press by means of a hall crane.
    An advantageous embodiment of a detachable support element may consist in that the upper cross member have mutually aligned and the cross member penetrating receiving slots in which edge portions of the support element are used. As a result, the support element itself can be supported in the receiving slots on, and thus results in a particularly stable attachment of the support member to the upper cross members.
    Since during a forming process of the adjusting very large forces exerted upward on the support member, it is advantageous if this is fastened with its upper side against the upper side of the receiving slots fitting. This can advantageously be done by means of clamping elements, for example by means of clamping screws. An alternative embodiment of a clamping element could also be realized by clamping wedges with which a support element is braced in the vertical direction in the receiving slot.
    An embodiment of the bending press, wherein the upper press beam at both end portions on its upper side each having a recess in which an adjusting member of the adjusting is fixed and wherein a vertical height of the upper press bar at its guided end portions has a cross-sectional height which is at least 75% of Cross section height in the middle of the upper beam, offers the possibility to use comparatively large or voluminous adjusting drives, while allowing a stable and precise guidance of the upper press beam on the side cheeks. For the strength of the upper beam these are from the top relatively far downwardly extending recesses unproblematic, since the maximum bending stress generally occurs in the middle of the upper press beam. For example, the upper press beam can have a vertical cross-sectional area below the recesses that is less than 50% of the vertical cross-sectional area in the middle region of the upper press beam, allowing the recesses to further downwardly adjust the actuators thereby reducing the overall height of the press brake. Furthermore, a material and weight savings can be achieved thereby.
    To increase the operator safety of a bending press according to the invention, it may further be provided that a beam-based safety device is attached to the upper beam, with the movement space can be monitored below the upper beam on Störkonturen and the Si cherheitseinrichtung at least on one side by means of a motor-driven actuator , In particular transversely to the adjustment of the upper press beam from the space between the O-recess, the side cheeks and tool holders on the lower and upper clamping bar is adjustable. Thereby, a tool change through the O-recess of the side cheeks can be done without this would be hindered by the safety device.
    A high bending accuracy of the bending press is favored in that the side cheeks, the lower pressing beam and the upper pressing beam are formed approximately symmetrically with respect to the vertical working plane of the bending press. The forces that are introduced into the machine frame via the press beams and thus cause a deformation on the machine frame cause little or no bending moments transversely to the work plane and thereby reduce the bending inaccuracy of worsening warping within the machine frame.
    An embodiment in which the end sections have an increasing cross-section height in the direction of the side cheeks on the lower press beam and / or on the upper cross member is advantageous because weight-saving weight-saving is possible through sections with smaller cross-sectional heights, due to the relatively enlarged cross-sectional heights at the end However, a connection with the side cheeks with large weld lengths is possible and result in low, specific stresses within the welds.
    A bending press according to the invention may further be provided with a backgauge device for positioning a bending work piece to be bent, it being advantageous if it is fastened completely below the center slit at the rear side of the lower press beam. The production of a crowning of the lower press beam by activating the actuators acting in the central slot actuators by this arrangement has no effect on the function or attachment of the backgauge and the machine frame no further basic or basic elements or foundations behind the lower beam presses are required.
    A further simplification of the assembly can be effected in that a hydraulic system for supplying hydraulic cylinders of the adjusting drive is attached to the rear of the rear, upper cross member, which is similar to the previous in the backgauge reliable attachment to a stable component is given without further elements of the machine frame fastening elements are provided. The increased arrangement of the hydraulic system further reduces the risk of damage that would be present if the hydraulic system were provided near the bottom of the lower beam press.
    For a better understanding of the invention, this will be explained in more detail with reference to the following figures.
    Each shows in a highly schematically simplified representation:
    Figure 1 is an overall view of a bending press according to the invention in the form of a press brake.
    FIG. 2 shows a view of a bending press according to the invention according to FIG. 1 without trim parts and accessories; FIG.
    3 is a front view of the machine frame of a bending press according to the invention;
    4 shows a rear view of a bending press according to the invention without trim parts;
    5 shows a partial section of the bending press according to the invention in an oblique view.
    6 shows a partial section through a further embodiment of a bending press according to the invention.
    1 to 5, a possible embodiment of a bending press 1 according to the invention is shown, wherein certain structural features shown are not to be regarded as essential erfindungsnotwendige features, but alone or in combination with other structural features a possible, inventive embodiment of the bending press. 1 can represent.
    Fig. 1 shows the bending press 1 according to the invention in the form of a press brake from the operator side front in an oblique view. The bending press 1 comprises a machine frame 2 with two mutually spaced side cheeks 3 and 4, which are fixedly connected to each other via a lower, fixed pressing beam 5 and two upper stationary cross members 6 and 7 and thereby essentially build the fixed part of the machine frame 2. In the machine frame 2, an upper press bar 8 is adjustably mounted and can be arranged on the lower press bar 5 and the upper press bar 8 in the Fig., Not shown, cooperating bending tools with which a sheet metal workpiece can be reshaped. As bending tools, for example, a V-bending die are provided on the lower pressing beam 5 and a bending punch is provided on the upper pressing beam 8, whereby an angular bending can be produced on a flat workpiece section.
    The bending press 1 further comprises a machine cover 9, which delimits the working area of the bending press 1 laterally and rearwardly. The machine panel 9 may, as shown in Fig. 1, also extend partially over the operator-side front of the bending press 1, for example as a cover for adjusting drives 10, with which the upper pressing beam 8 is moved relative to the stationary machine frame 2 and with which for a transformation of a sheet metal workpiece required forces are generated. The adjusting drives 10 can be designed as hydraulic drives with hydraulic cylinders or equipped with an electric motor spindle drive. In Fig. 1, the adjusting drives 10 are covered by the machine cover 9.
    Fig. 1 further shows a control panel 11 and a foot switch assembly 12, with which an operator can influence the workflows on the bending press 1 by these are used as an operator interface for a machine control, not shown.
    Also shown on the front side of the lower press beam 5 is an optional workpiece support 13 which assists an operator in feeding and handling bending workpieces. The workpiece support device comprises a guide rail 14 attached to the front side of the lower press beam, which extends in the horizontal direction substantially over the major part of the length of the lower press beam 5. On the guide rail 14, at least one support 15 is adjustably mounted, which can be adjustable, for example, in their height, their inclination or their distance from the lower pressing beam 5.
    The lower end of the support 15 may additionally be guided on a lower running rail 16 or slide along it or roll along it.
    FIG. 1 further shows an optional backgauge device 17 which assists an operator in positioning bending workpieces to be formed. The backgauge device 17 is arranged behind the lower, fixed pressing beam 5 and comprises, for example, two stop fingers 18, which are adjustable in the direction of width, height and depth of the bending press 1 and automatically by the machine control in response to a workpiece to be bent in a suitable Stop position can be adjusted, in which an operator can spend a workpiece in the correct position with respect to the vertical working plane between the bending tools.
    The bending press 1 shown in Fig. 1 further comprises an optional, beam-based safety device 19, with the movement space below the upper press beam 8 and below a bending tool arranged thereon can be monitored for interfering contours and with the emergency stop the movement of the upper press bar 8 can be triggered.
    In Fig. 1 further arranged in the lower pressing bar 5 center slot 20 and two side slots 21 is shown, the function of which is explained with reference to a further figure.
    As can be seen in FIG. 1, the guide rail 14 of the workpiece support device 13 is fastened above the central slot 20 on the lower press beam 5.
    Fig. 2 shows a bending press 1 according to the invention without machine panel 9 and attachments, whereby the structure of the machine frame 2 is better recognizable.
    The two side cheeks 3 and 4 are plate-shaped and provided with O-recesses 22, which is in contrast to so-called C-stands material of the side cheeks 3, 4 both in front of and behind the vertical working plane of the bending press 1. The side cheeks 3 and 4 are connected to each other at their upper end portions via the upper cross beams 6 and 7, while being connected to each other at their lower end portions above the lower press beam 5.
    The side cheeks 3 and 4 may be referred to by the design with O-slots 22 as O-frame and the side cheeks 3, 4 advantageously perpendicular and symmetrical to the working plane of the bending press 1 executed. In contrast to C-stands, the side cheeks 3 and 4 are subjected to high forming forces substantially only to train and there are no deformations of the side walls 3, 4, through which the upper beam 8 would change in its angular position.
    As a result, some dimensions of a bending press 1 are given by way of example, which, however, may sometimes differ greatly from these values if required.
    The side cheeks 3, 4 of a bending press 1 according to the invention are made for example of steel with a thickness of 50 mm and have a horizontal depth of, for example, 440 mm. For example, the dimension of an O-cut is 240 mm in the horizontal depth and 725 mm in the vertical height, for example.
    The upper pressing beam 8 is formed, for example, of steel having a thickness of 50 mm, and the lower pressing beam 5, for example, of steel having a thickness of 100 mm. The total height of the side cheeks 3, 4 is for example 2370 mm; the total width of the bending press 1 is for example 3500 mm. The usable working length on the lower press beam 5 or on the upper press beam 6 is for example about 3060 mm.
    According to the invention, lateral end sections 23 of the upper press beam 8 are each guided vertically adjustable above the center of the O-cutouts 22 by means of guide elements 24 arranged on the side cheeks 3 and 4. At the end portions 23, the upper pressing beam 8 has, for example, guide surfaces 25 on the user-side front side and on the opposite rear side and these guide surfaces 25 are guided, for example, between guide rollers 26 which are arranged on the side cheeks 3 and 4 and horizontal and to the working plane of the bending press 1 have parallel roller axes.
    The guide surfaces 25 at the end portions 23 of the upper press beam 8 are preferably each guided between at least two pairs of such guide rollers 26, whereby an angular misalignment of the upper press beam 8 is effectively counteracted.
    The embodiment of a bending press 1 shown in FIG. 2 has adjustment drives 10 in the form of hydraulic cylinders 27 for adjusting the upper pressing bar 8, which couple the adjustable pressing bars 8 to the machine frame 2. In the illustrated embodiment, the hydraulic cylinders 27 have downwardly extendable piston rods, which are bolted to the upper pressing beam 8. This and the two hydraulic cylinders 27 are at least partially disposed between the mutually distanced and parallel upper cross members 6 and 7, whereby the bending press 1 has a comparatively small overall height.
    In the area of the hydraulic cylinders 27, the upper pressing beam 8 has recesses 28 on its upper side, in each of which an adjusting element of the adjusting drive 10, in this case the piston rods of the hydraulic cylinders 27, is fastened. In the area of the recesses 28, the vertical height 29 of the upper press beam is smaller than the cross-sectional height 30 in the middle of the upper press beam 8, for example about 50% of the cross-sectional height 30.
    At the outer ends of the upper press beam 8, the cross-sectional height 31 relative to the height 29 in the region of the recesses 28 increases again. For the guidance of the upper press beam 8 on the side cheeks 3, 4 is thereby the largest possible guide length available. The cross-sectional height 31 at the end of the upper press beam 8 is, for example, at least 75% of the cross-sectional height 30 in the middle of the upper press beam 8.
    Fig. 2 further shows the arranged on the lower pressing bar 5 side slits 21 and the central slot 20, which serve to adapt the deformation of the lower press beam 5 as well as possible to the deformation of the upper press beam 8 in a forming process. Since at high forming forces the upper clamping bar 8 bends slightly upward between the adjusting drives 10, it is advantageous in this case if the lower pressing bar 5 has an approximately parallel, convex curvature upward, ie a greater height in the middle The side slots 21 serve to allow the end portions 32 of the lower beam 5 to slightly lower under the action of a forming force, and the center slot 20 serves to slightly raise the top of the lower beam 5 in the center , The side slits 5 extend from side end portions 32 towards a central portion of the lower press beam 5 and terminate before this. The length of the side slots 21 is for example about 1/4 of the total working width of the lower press beam 5. The center slot 20 extends in the horizontal direction between the top of the lower press beam and its central portion and are in this height-adjustable actuators 33, in particular in the form of hydraulic cylinders 34th provided, whereby the slot width of the central slot 20 can be increased and thereby the top of the lower press beam 5 can be slightly raised in the region of the center.
    In the advantageous embodiment shown in FIG. 2, the lower pressing beam has an approximately rectangular basic shape and the side slots 21 are arranged in the middle third of the overall height of the pressing beam 5. Starting from the lateral end portions 32 they extend in the direction of the central portion shallow sloping at an angle of less than 10 ° to the horizontal.
    The lower pressing bar 5 has thereby over its length a similar course of the bending stiffness as the upper pressing bar 8.
    As can be seen in Fig. 2, the upper cross member 6, 7 are spaced from each other and extends the upper beam 8 at least partially between the upper cross members 6 and 7. The distance between the two cross members 6, 7, it is also possible shown in Fig. 2, the adjustment drives 10 also at least partially between the cross members 6, 7 to be arranged, which in turn a low overall height is possible.
    Thus, the side slots 21 and the central slot 20, the strength of the lower beam 5, in particular not adversely affect the fatigue strength, it is advantageous if the ends of the slots 20, 21 are executed rounded, and in particular in rounded recesses 36 pass, compared to a Slot width 35 are enlarged to at least twice the size. A notch effect of the central slot 20 and the side slots 21 is thereby largely avoided.
    Fig. 3 further shows a special embodiment of the connection of the adjustment 10 on the machine frame 2, which offers a high degree of ease of installation. Here, the adjusting drive 10, here for example in the form of a hydraulic cylinder 27, an upwardly oriented support surface 37 which contacts a downwardly oriented counter surface 38 of the two upper cross member 6, 7 connecting support member 39.
    Since the support member 39 is detachably connected to the upper cross members 6, 7, it is possible to bring the pressing beam 8 and possibly also the adjusting 10 before mounting the support member 39 in position, for example by this with a hall crane between the upper cross members 6, 7 are lowered. Subsequently, the support member 39 is brought into position and connected to the upper cross members 6, 7.
    Since large forces also act on the support element 39 at high forming forces, it is advantageous if the support element 39 is inserted on the two cross members 6, 7 in each case in a recess 40, in particular in the form of a receiving slot 41. The receiving slots 41 penetrate both upper cross members 6, 7 in the horizontal direction and aligned with each other, whereby a support member 39 can be introduced in the form of a plate from the front or from the back of the bending press 1 in the receiving slots 41. Subsequently, a fastening takes place both with the adjusting drive 10, which is supported on the counter surface 38 on the underside of the support member 39 and an attachment of the support member 39 to the two transverse beams 6, 7th
    Since large forming forces acting on the support member 39 upwards, it is advantageous if this is clamped against the top of the recess 40, in particular the receiving slots 41 fitting. The support element 39 can be tensioned, for example, by means of one or more clamping screws 42 against the upper side 43 of the recess 40 or the recess slots 41.
    As can be seen in the figures, the lower press beam 5 below the center of the O-recesses 22 is connected to the side cheeks 3, 4, preferably by means of a weld.
    Fig. 4 shows a rear view of an embodiment of the bending press 1 according to the invention, wherein on already described with reference to FIGS. 1 to 3, structural features to avoid repetition at this point is no longer discussed.
    In the illustrated embodiment, the adjustment drives 10 for the upper press beam 8 are formed by hydraulic cylinders 27, which are supplied by a Flydrauliksystem 44 at the back of the press brake 1. The hydraulic system 44 is attached to the rear side of the upper cross member 7 and essentially comprises an electric drive motor 45, a driven by this hydraulic pump 46 and a tank 47 for the hydraulic fluid. To form the hydraulic circuits, the hydraulic system 44 further includes unspecified hydraulic lines and other system components, such as valves, filters, cooling devices and so on.
    Fig. 4 also shows an intended for the already described with reference to FIG. 1 safety device 19 adjusting device 48, which is driven by a motor, and by the safety device 19 from the space between the O-recess 22 of the side cheeks 3, 4 and tool holders at the bottom and upper press beams 5, 8 is adjustable. In particular, the safety device 19 can be adjustable at right angles to the vertical working plane of the bending press 1, for which purpose corresponding guide rails 49 can be provided. As an alternative to a rectilinear adjustment of the safety device 19, an adjustment by means of a pivoting device is also possible. By this removal of the safety device 19 from the space of the O-recesses 22, bending tools can be inserted or removed therethrough, whereby set-up operations are facilitated.
    The backgauge device 17 already described with reference to FIG. 1 is fastened to the rear side of the lower press beam 5 below the center slot 20 shown in FIGS. 1 to 3 and essentially comprises a support bracket 50 screwed or welded to the rear side of the lower press beam 5 this perpendicular to the working plane adjustable carriage 51 and a height-adjustable mounted on this rail 52, on which the stop fingers 18 are mounted adjustably in the horizontal direction.
    FIG. 5 shows a partial section through a bending press 1, with the same reference numerals or component designations being used again for the same parts as in the preceding FIGS. 1 to 4. To avoid unnecessary repetition, reference is made to the detailed description in the preceding Figs. 1 to 4 or reference.
    As already described with reference to FIG. 3, in this embodiment, the bending press 1, the support member 39 is received in receiving slots 41 in the upper cross members 6 and 7 and the hydraulic cylinder 27 is supported with a support surface 37 on a mating surface 38 of the support member 39 from. In the illustrated
    Embodiment of FIG. 5, the support member 39 is tensioned by four clamping screws 42 against the top of the receiving slots 41, the heads of the clamping screws 42 do not attack directly in the cross members 6, 7, but are used in their own clamping elements 53, which at the top of rest upper cross member 6, 7 and bridge the gap between them. The clamping screws 42 run very close to the respective cross members 6, 7 and can be dispensed with this embodiment on the production of vertical holes in the cross members 6, 7 for the clamping screws 42.
    Fig. 5 further shows that the lower pressing beam 5 has at its lateral end portions 32, with which it is attached to the side cheeks 3, 4, an increasing cross-sectional height, whereby for the connection with the side cheeks 3, 4 as large a length as possible for welds 54 present. To achieve the same effect may alternatively or additionally be provided at end portions 55 of the cross member 6, 7 in the direction of the side cheek 3, 4 increasing cross-sectional height to cause a greater length of the weld 54.
    Fig. 6 shows an alternative embodiment of the bending press 1, wherein the support member 39 is also received in receiving slots 41 in the upper cross members 6 and 7, the clamping screws 42 are used in this embodiment, however, directly in the upper cross members 6, 7.
    The embodiments show possible embodiments of the bending press 1, wherein it should be noted at this point that the invention is not limited to the specifically illustrated embodiments thereof, but also various combinations of the individual embodiments are possible with each other and this possibility of variation due to the teaching of technical action representational invention in the skill of those skilled in this technical field. So are all conceivable embodiments, which are possible by combinations of individual details of the illustrated and described embodiment variant, includes the scope of protection.
    For the sake of order, it should finally be pointed out that, for a better understanding of the structure of the bending press 1, these or their components have been shown partially unevenly and / or enlarged and / or reduced in size.
    Finally, it should be noted that in the differently described embodiments, the same parts are provided with the same reference numerals and the same component names, the disclosures contained throughout the description can be mutatis mutandis to the same parts with the same reference numerals or identical component names. Also, the location information chosen in the description, such as top, bottom, side, etc. related to the immediately described and illustrated figure and are to be transferred to the new situation mutatis mutandis when a change in position. Furthermore, individual features or combinations of features from the different exemplary embodiments shown and described can also represent independent, inventive or inventive solutions. All statements on ranges of values in the description of the present invention should be understood to include any and all sub-ranges thereof, e.g. the indication 1 to 10 should be understood to include all sub-ranges, starting from the lower limit 1 and the upper limit 10, i. all subregions begin with a lower limit of 1 or greater and end at an upper limit of 10 or less, e.g. 1 to 1.7, or 3.2 to 8.1 or 5.5 to 10.
    The task underlying the independent inventive solutions can be taken from the description.
    Above all, the individual in FIGS. 1, 2, 3, 4, 5; 6 embodiments form the subject of independent solutions according to the invention. The relevant objects and solutions according to the invention can be found in the detailed descriptions of these figures.
    LIST OF REFERENCE NUMERALS 1 bending press 36 recess 2 machine frame 37 support surface 3 side cheek 38 counter surface 4 side cheek 39 support element 5 lower press beam 40 recess 6 upper cross member 41 receiving slot 7 upper cross member 42 clamping screw 8 upper press bar 43 top 9 machine paneling 44 hydraulic system 10 adjustment drive 45 drive motor 11 control panel 46 hydraulic pump 12 Footswitch assembly 47 Tank 13 Workpiece support device 48 Adjustment device 14 Guide rail 49 Guide rails 15 Support 50 Support bracket 16 Track 51 Carriage 17 Backgauge 52 Track 18 Stop finger 53 Clamp 19 Safety device 54 Weld 20 Center slot 55 End section 21 Side slot 22 O-recess 23 End sections 24 Guide element 25 Guide surface 26 Guide roller 27 Hydraulic cylinder 28 Recess 29 Height 30 Cross-sectional height 31 Cross-sectional height 32 End section 33 Actuator 34 Hydraulic cylinder 35 Slot width
    权利要求:
    Claims (16)
    [1]
    1. bending press (1), in particular press brake, for forming a sheet metal workpiece, comprising a machine frame (2) with two mutually spaced side cheeks (3, 4), a fixed lower pressing bar (5) and an adjustable upper pressing bar (8) on those cooperating bending tools can be arranged, one with the machine frame (2) and the upper pressing beam (8) coupled adjusting drive (10), in particular with hydraulic cylinders (27), wherein the side cheeks (3, 4) plate-shaped and with O-recesses (22) are formed and arranged parallel to each other and the upper pressing beam (8) at least partially between two the side cheeks (3, 4) connecting the upper cross members (6, 7) is arranged, characterized in that the lower pressing bar (5) below the middle of the O - recesses (22) with the side cheeks (3, 4) is connected and lateral end portions (23) of the upper press beam (8) respectively above the center of the OA recesses (22) are guided by means arranged on the side cheeks (3, 4) guide elements (24).
    [2]
    2. bending press (1) according to claim 1, characterized in that the upper pressing bar (8) formed at its end portions (23) guide surfaces (25) between the side cheeks (3, 4) arranged guide rollers (26) with horizontal and Working plane of the bending press (1) parallel roller axes is performed.
    [3]
    3. bending press (1) according to claim 1 or 2, characterized in that the lower pressing beam (5) has side slots (21) extending from its lateral end portions (32), starting in the direction of its central portion and terminate before this, wherein the lower pressing bar (5) is connected to the side cheeks (3, 4) only below the side slots (21), and that the lower pressing bar (5) has an approximately horizontal central slot (20) between its upper side and its middle section, in which height-adjustable actuators (33), in particular in the form of hydraulic cylinders (34).
    [4]
    4. bending press (1) according to one of claims 1 to 3, characterized in that the lower pressing bar (5) has an approximately rectangular basic shape and the side slots (21) in the middle third of the total height of the lower press bar (5) are arranged and starting are executed by lateral end portions towards the middle section flat sloping.
    [5]
    5. bending press (1) according to claim 3 or 4, characterized in that the side slots (21) and the central slot (20) in the lower pressing bar (5) are rounded at their ends, in particular in relation to the slot width (35) on at least double dimension enlarged, rounded recesses (36) go over.
    [6]
    6. bending press (1) according to one of claims 1 to 5, characterized in that the adjusting drive (10) has an upwardly oriented support surface (37) having a downwardly oriented counter surface (38) of the upper cross member (6, 7 ) releasably connecting support member (39) contacted.
    [7]
    7. bending press (1) according to claim 6, characterized in that the upper cross member (6, 7) mutually aligned and the cross member (6, 7) penetrating receiving slots (41) into which a support member (39) is inserted.
    [8]
    8. bending press (1) according to claim 7, characterized in that the support element (39) by means of a clamping element, in particular by means of clamping screws (42) against the top (43) of the receiving slots (41) are clamped fitting.
    [9]
    9. bending press (1) according to one of claims 1 to 8, characterized in that the upper pressing bar (8) at both at its upper side in each case a recess (28) in which an adjusting member of the adjusting drive (10) is attached, wherein the upper press beam (8) has at its guided end sections (23) a cross-sectional height (31) which is at least 75% of the cross-sectional height (30) in the middle of the upper press beam (8).
    [10]
    Bending press (1) according to claim 9, characterized in that the upper pressing beam (8) below the recesses (28) has a vertical height (29) which is less than 50% of the vertical cross-sectional area (30) in the central region of the upper pressing beam (8).
    [11]
    11. bending press (1) according to one of claims 1 to 10, characterized in that the upper beam (8) a light beam-based safety device (19) is fixed, with the movement space below the upper press beam (8) can be monitored for interference contours and the safety device (19) at least on one side by means of a motor-driven adjusting device (48), in particular transversely to the adjustment of the upper press bar (8), from the space between the O-recess (22) of the side cheeks (3, 4) and tool holders on lower and upper clamping bar (5, 8) is adjustable.
    [12]
    12. bending press (1) according to one of claims 1 to 11, characterized in that the side cheeks (3, 4), the lower pressing beam (5), the upper pressing beam (8) and the upper cross member (6, 7) approximately symmetrically with respect to the working plane of the bending press (1) are formed.
    [13]
    13. bending press (1) according to one of claims 1 to 12, characterized in that the lower press bar (5) and / or on the upper cross member (6, 7) end portions (32) one in the direction of the side cheeks (3, 4) have increasing cross-sectional height.
    [14]
    14. bending press (1) according to one of claims 1 to 13, characterized in that a Hinteranschlagvorrichtung (17) for positioning a bending workpiece to be bent completely below the central slot (20) at the back of the lower press beam (5) is attached.
    [15]
    15. bending press (1) according to one of claims 1 to 14, characterized in that a hydraulic system (44) for supplying hydraulic cylinders (27) of the adjusting drive (10) on the back of the rear upper cross member (7) is fixed.
    [16]
    16. bending press (1) according to one of claims 1 to 15, characterized in that on the lower pressing bar (5) on the front side facing an operator in a horizontal direction over the greater part of the length of the lower press beam (5) extending guide rail (14 ) is mounted for a workpiece support device (13), wherein the guide rail (14) above the central slot (20) is arranged.
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    同族专利:
    公开号 | 公开日
    CN105916606B|2019-06-07|
    WO2015081359A1|2015-06-11|
    AT515153B1|2015-08-15|
    CN105916606A|2016-08-31|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE4215807A1|1992-05-15|1993-11-18|Mannesmann Ag|Pipe bending press - has lower piston cylinder units between table and lower beam in a closed frame structure|
    EP2210681A2|2009-01-27|2010-07-28|Trumpf Maschinen Austria GmbH & CO. KG.|Bending press with a multi-part press bar|
    WO2011039697A1|2009-10-02|2011-04-07|G01.Com S.R.L.|Press-bending machine|
    CN203002865U|2012-12-19|2013-06-19|山东力丰重型机床有限公司|Pressure bending machine|
    DE4138286A1|1991-11-21|1993-05-27|M & S Brugg Ag|PRESS|
    JP2000343125A|1999-05-28|2000-12-12|Amada Co Ltd|Press brake|
    FR2797407B1|1999-08-09|2001-11-02|Amada Europ Sa|LOWER APRON PRESS WITH SLOTS|
    JP2001121214A|1999-10-27|2001-05-08|Amada Co Ltd|Press brake crowning device|
    AT427830T|2003-02-26|2009-04-15|Bystronic Laser Ag|METHOD FOR CORRECTING A BENDING AND BENDING PRESSURE|
    FR2942980B1|2009-03-13|2011-04-08|Amada Europ|PRESS BRAKE FOR FOLDING SHEETS|
    ITMI20110977A1|2011-05-30|2012-12-01|Finn Power Italia S R L|FOLDING PRESS|
    PT106004B|2011-11-15|2020-12-16|Adira Metal Forming Solutions S A|APRON FOR DEFORMATION COMPENSATION FOR BENDERS|FR3061046B1|2016-12-23|2019-05-24|Gaztransport Et Technigaz|FOLDING DEVICE FOR FORMING A CORRUGATION IN A METAL SHEET AND METHOD OF USING THE SAME|
    JP6868581B2|2018-02-22|2021-05-12|株式会社アマダ|Crowning method and press brake in press brake|
    CN108994166B|2018-09-04|2019-11-08|南京海长智能装备有限公司|A kind of long side die mould bending machine|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50796/2013A|AT515153B1|2013-12-04|2013-12-04|bending machine|ATA50796/2013A| AT515153B1|2013-12-04|2013-12-04|bending machine|
    CN201480073511.4A| CN105916606B|2013-12-04|2014-12-02|Bullodozer|
    PCT/AT2014/050287| WO2015081359A1|2013-12-04|2014-12-02|Bending machine|
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