EP3515617A1

EP3515617A1 - Tool, machine tool, and method for machining planar workpieces

Info

Publication number: EP3515617A1
Application number: EP17783414.0A
Authority: EP
Inventors: Jens Kappes; Markus Wilhelm; Rainer Hank; Marc Klinkhammer; Leonard Schindewolf; Simon OCKENFUSS; Dennis Tränklein; Alexander Tatarczyk; Jörg Neupert; Dominik BITTO; Markus MAATZ; Christian JAKISCH
Original assignee: Trumpf Werkzeugmaschinen SE and Co KG
Current assignee: Trumpf Werkzeugmaschinen SE and Co KG
Priority date: 2016-09-26
Filing date: 2017-09-26
Publication date: 2019-07-31
Anticipated expiration: 2037-09-26
Also published as: JP2019529120A; US11471924B2; CN109789464B; CN109789464A; WO2018055186A1; US20190217360A1; EP3515617B1; PL3515617T3; JP7036804B2

Abstract

The invention relates to a tool for machining planar workpieces (10), in particular metal sheets, having an upper tool (11), which has a clamping shaft (34) and a main body (33), which lie along a common position axis (35), and a machining tool (37), which is arranged opposite the clamping shaft (34) on the main body (33) and which has at least one machining edge (38, 39), having a lower tool (9), which has a main body (41) having a support surface (47) for the workpiece (10), and having a counter body (93), which is provided on the main body (41) and which has at least one counter edge (506, 507), the main body (41) comprising a position axis (48), which is oriented perpendicularly to the support surface (47), and the upper tool (11) and the lower tool (9) being movable toward each other in a reciprocation direction in order to machine a workpiece (10) arranged therebetween and a machining plane being formed between the upper tool (11) and the lower tool (9), the at least one machining edge (38, 39) of the machining tool (37) extending at least partly along a hold-down surface (501) provided on the main body (33), the counter tool body (93) being designed as a counter roller (505), which has the at least one counter edge (506, 507), which lies opposite the at least one machining edge (38, 39) of the machining tool (37), and a machining device (508) being provided adjacent to the at least one counter edge (505, 506), which machining device has at least one curved counter surface (521), which is oriented in the longitudinal direction of the machining edge (38, 39) of the machining tool (37).

Description

Tool and machine tool and method for processing plate-shaped workpieces
The invention relates to a tool and a machine tool and a method for processing plate-shaped workpieces, preferably of sheets.
Such a machine tool is known from EP 2 527 058 B1. This document discloses a machine tool in the form of a press for machining workpieces, wherein an upper tool is provided on a lifting device which is movable relative to a workpiece to be machined along a lifting axis in the direction of the workpiece and in the opposite direction. In the Hubachse and the upper tool opposite a lower tool is provided, which is positioned to a bottom. A lifting drive device for a lifting movement of the upper tool is driven by a wedge gear. The lifting drive device with the upper tool arranged thereon can be moved along a positioning axis. The lower tool is moved synchronously to the upper tool.
From DE 10 2006 049 044 A1 a tool for forming workpieces is known, which comprises an upper tool on which a roller is provided, which is rotatable about an axis of rotation perpendicular to the position axis of the upper tool. This role has as a processing device a conical forming surface. On the lower tool a counter-roller is provided within the bearing surface on the base body of the lower tool. This counter-roller is rotatable about a rotation axis perpendicular to the position axis of the lower tool. The axis of rotation of the roller on the upper tool is thus aligned parallel to the lower tool. For machining a workpiece, the upper tool and lower tool are moved towards one another in the stroke direction until the workpiece to be machined is clamped between the roller of the upper tool and the counter-roller of the lower tool. In the clamped state, the forming surface of the roller and the opposing in the stroke direction counter surface of the counter-roller act together. By moving the workpiece in a horizontal plane between the upper tool and lower tool, a deformation, in particular a shoulder, is created on the workpiece in a continuous mode of operation. The upper tool and lower tool are arranged stationary in the machine tool.
From DE 10 2005 003 558 A1 a tool for forming workpieces is known, which comprises an upper tool on which a roller is provided with a groove-shaped recess. This roller is rotatable about an axis of rotation perpendicular to the positioning axis of the upper tool. On the lower tool a counter-roller is provided within the support surface on the base body of the lower tool. This counter-roller is rotatably received about a rotation axis perpendicular to the positioning axis of the lower tool. For machining a workpiece, the upper tool and lower tool are moved towards one another in the stroke direction until the workpiece to be machined is clamped between the roller of the upper tool and the counter-roller of the lower tool. By moving the workpiece in a horizontal plane between the upper tool and lower tool forming is introduced. An analogous tool is evident from EP 0 757 926 B1. Furthermore, a tool with an aforementioned structure from US 8,042,369 B2 is known.
From US 5,787,775 A a cutting tool in a punch press is known in which the cutting tool is freely rotatable about a perpendicular to the workpiece plane of the workpiece to be machined aligned stroke axis. The rotating cutting blade on the upper tool interacts with a counter-cutting tool fixedly arranged on the lower tool. The upper tool can be rotated synchronously with the lower tool for introducing a cutting movement, wherein the two Hubachsen are aligned congruent to each other.
The invention has for its object to provide a tool and a machine tool as well as a method for processing plate-shaped workpieces through which the flexibility in the machining of workpieces is increased.
The object underlying the invention is achieved by a tool for processing plate-shaped workpieces, in particular of sheets, which has an upper tool consisting of a clamping pin and a base body, which lie in a common position axis and a clamping shaft opposite and arranged on the main body machining tool at least one processing edge, as well as a lower tool comprising a base body with a support surface for the workpiece and with at least one provided on the main body opposite edge and a lying in the body position axis, which is aligned perpendicular to the support surface. The upper tool and lower tool are movable towards one another for machining a workpiece arranged therebetween in a lifting movement. Between the upper tool and the lower tool, a machining plane is formed. The at least one machining edge of the machining tool on the upper tool extends at least partially along a hold-down surface. The counter-tool body is designed as a counter-roller. The at least one opposite edge of the counter tool is opposite to the at least one processing edge of the processing tool. Adjacent to the at least one mating edge is a machining device of the mating tool body, which has at least one curved mating surface aligned in the longitudinal direction of the machining edge of the machining tool. By this tool, a machining tool is created in which by a pendulum stroke machining of the workpiece is possible. The upper and / or lower tool is sequentially moved in the pendulum stroke along the processing plane, so in each case alternately to each other. During the movement, the machining edge of the machining tool and the counter edge of the counter tool body act on the workpiece to keep it clamped. Due to the curved mating surface of the machining device on the mating tool body, which protrudes from the machining edge on the machining tool, there is a machining of the workpiece, such as cutting, punching, embossing and / or forming. By designed as a counter-roller counter tool body friction between the lower tool and the workpiece to be machined can be reduced during the pendulum stroke.
It is preferably provided that the at least one machining edge of the machining tool on the upper tool extends along the entire main body of the upper tool. As a result, a maximum length of a working stroke or pendulum stroke for introducing a machining contour into the workpiece is made possible.
Advantageously, it is provided that the machining edge is aligned perpendicular to the position axis. As a result, simple force conditions can be given and also increased forming forces can be achieved. It is preferably provided that the machining tool crosses the position axis, thereby even better conditions in the machining process can be achieved.
A preferred embodiment of the machining tool provides that a processing surface is provided adjacent to the machining edge, which is preferably formed in a recess in the base body. As a result, for example, a machining contour can be limited in depth relative to the workpiece plane.
Advantageously, the depression in the base body is delimited by two mutually spaced machining edges of the machining tool. As a result, for example, a width of the contour, which is introduced into the workpiece, limited.
On the lower tool, the counter-tool formed counter-body is preferably aligned about an axis of rotation, in particular perpendicular to the position axis of the lower tool. As a result, simple geometric conditions can be created, which allow the introduction of a high forming force in the workpiece.
It is preferably provided that the counter edge is provided circumferentially on the counter-roller. Adjacent to the opposite edge, a support surface may be provided on the counter-roller, which is aligned with the hold-down surface on the base body of the upper tool. This makes it possible for a clamping position of the workpiece to be maintained during the relative movement of the upper tool and / or lower tool for machining the workpiece, whereby a minimization of friction is made possible in particular during a movement of the lower tool relative to the upper tool.
Advantageously, adjacent to the opposite edge of the counter-roller to a processing surface of the processing device. This processing surface is the support surface of the counter-roller opposite. This processing surface may be formed in the mold as a function of the punching, cutting, embossing and / or forming process to be performed.
Furthermore, it is preferably provided that the counter-roller formed as a counter-tool body has two mutually spaced opposite edges whose spacing is parallel to the mutually spaced machining edges of the machining tool and in the plane of the support of the lower tool and extends between the opposite edges of the counter-roller, a counter surface of the processing device, which is raised in the direction of the upper tool. This makes it possible that, when the upper tool and the lower tool are moved toward one another into a machining position, in which the workpiece is clamped between the upper tool and lower tool, a defined contour is introduced into the workpiece by the machining device. The processing device of the counter-roller preferably engages in the recess on the base body.
It is preferably provided that the counter surface of the processing device is provided on the counter roller as a forming surface. As a result, for example, a bead can be introduced. The contour of the bead is dependent on the cross-sectional geometry of the processing device and / or the course of the depression, which adjoins at least one processing edge or extends between the two mutually parallel processing edges. Furthermore, the mating surface on the counter-roller may have at least one cutting edge. In this case, the machining edge on the upper tool and the counter edge on the counter roller can hold the workpiece in a defined position, wherein the cutting edge dips into the recess on the upper tool and introduces a cut in the workpiece. Furthermore, it can alternatively be provided that the mating surface of the processing device has a forming surface and a cutting edge. As a result, for example, gills can be introduced into the workpiece. A further alternative embodiment of the mating surface of the machining device provides that it has two cutting edges, which are aligned with the processing edges on the upper tool. This allows a strip of material to be cut out of the workpiece.
A further preferred embodiment of the machining tool on the upper tool provides that the machining surface of the machining tool is formed as a support roller in the recess. As a result, additional friction minimization can be achieved during the machining process for introducing a contour into the workpiece.
The object underlying the invention is further achieved by a machine tool for processing plate-shaped workpieces, in which a tool according to one of the previously described embodiments is used and the movement of the upper tool along the upper positioning and the movement of the lower tool along the lower positioning each independently are controllable. As a result, a pendulum stroke for introducing a machining contour into the workpiece can be controlled and performed. In the pendulum stroke, a successive movement of the upper tool and the lower tool along the working plane between the upper and lower tool, wherein the length of the respective movement movement is limited to the effect that the workpiece is clamped between the upper tool and the lower tool. The machining contour can be a contour introduced by a stamping, cutting, embossing and / or forming process.
The object underlying the invention is achieved by a method for processing plate-shaped workpieces, in particular sheets, in which a tool according to one of the above-described embodiment is used and for machining the workpiece, the upper tool and the lower tool are driven with a lifting movement, so that the Workpiece between the upper tool and the lower tool is held clamped and for machining the workpiece, the upper tool and the lower tool individually or jointly rotated about the position axis of the upper and lower tool or the upper tool and the lower tool individually or jointly relative to each other along the positioning axis or the upper tool and the lower tool are rotated individually or jointly relative to each other about the position axis and are moved individually or jointly to each other along the positioning axis. This machining of the workpiece has the advantage that the workpiece can be kept stationary during processing. The machining of the workpiece, such as a stamping, cutting, embossing and / or forming process is performed by a movement of the upper tool and / or the lower tool and / or a rotational movement of the upper and / or lower tool relative to each other.
A preferred embodiment of the method for processing plate-shaped workpieces provides that for machining the workpiece after a lifting movement of the upper tool and / or the lower tool to hold the workpiece clamped therebetween, a first movement of the lower tool relative to the upper tool along the lower Positionierachse driven is, so that the counter tool body is moved relative to the machining tool along the lower positioning and subsequently a movement of the upper tool along the upper positioning axis is driven, while the lower tool is kept stationary. This makes it possible for a processing to take place on the workpiece during the first-mentioned movement of the lower tool, wherein the workpiece is positioned stationary relative to the upper tool or is stationary. A relative movement between the workpiece and the upper tool does not take place. As a result, the contour is introduced into the workpiece due to the movement of the lower tool. In a subsequent traversing movement of the upper tool, the lower tool is again kept stationary, wherein the upper tool is moved to be positioned again in a starting position to the lower tool to perform a subsequent power stroke or pendulum stroke. In this initial position, for example, the position axes of the upper and the lower tool can be aligned.
Furthermore, it is preferably provided that the movement of movement of the upper tool and the lower tool are controlled relative to each other along the upper and lower positioning with a maximum stroke, in which the workpiece by the processing edge of the machining tool on the upper tool and the counter surface of the processing device are clamped to the lower body ,
A further preferred embodiment of the method provides that during the processing of the workpiece, in particular during the movement of the lower tool relative to the stationary upper tool, a distance of the hold-down surface of the upper tool to the support surface of the lower tool is kept constant. As a result, constant conditions during machining of the workpiece can be created.
The invention and further advantageous embodiments and developments thereof are described in more detail below with reference to the examples shown in the drawings and explained. The features to be taken from the description and the drawings can be applied individually according to the invention individually or in combination in any combination. Show it:
FIG. 1 shows a perspective view of the machine tool according to the invention,
FIG. 2 shows a schematic representation of the basic structure of a lifting drive device and of a motor drive according to FIG. 1,
FIG. 3 shows a schematic diagram of a superimposed lifting movement in the Y and Z directions of the tappet according to FIG. 1,
FIG. 4 shows a schematic diagram of a further superimposed lifting movement in the Y and Z directions of the tappet according to FIG. 1,
FIG. 5 shows a schematic view from above of the machine tool according to FIG. 1 with workpiece support surfaces,
FIG. 6 shows a perspective view of a first embodiment of a tool,
FIG. 7 shows a schematic sectional view of the tool according to FIG. 6,
FIGS. 8 to 10 show schematic side views of the tool according to FIG. 6 of successive working steps for machining the workpiece,
11 shows a schematically simplified side view of the machined workpiece according to FIGS. 8 to 10, FIG.
FIG. 12 shows a schematically simplified side view of an alternative embodiment to FIG. 11,
FIG. 13 shows another schematically simplified side view of an alternative embodiment to FIG. 11,
FIG. 14 shows another schematically simplified side view of an alternative embodiment to FIGS. 11 and
FIG. 15 shows another schematically simplified side view of an alternative embodiment to FIG. 11.
FIG. 1 shows a machine tool 1, which is designed as a stamping press. This machine tool 1 comprises a support structure with a closed machine frame 2. This comprises two horizontal frame legs 3, 4 and two vertical frame legs 5 and 6. The machine frame 2 encloses a frame interior 7, the working area of the machine tool 1 with an upper tool 11 and a lower tool. 9 forms.
The machine tool 1 is used for processing plate-shaped workpieces 10, which are not shown in Figure 1 for the sake of simplicity and can be arranged for processing purposes in the frame interior 7. A workpiece 10 to be machined is placed on a workpiece support 8 provided in the frame interior 7. In a recess of the workpiece support 8, the lower tool 9 is mounted, for example in the form of a punching die on the lower horizontal frame leg 4 of the machine frame 2. This punching die can be provided with a die opening. During a punching process, the upper tool 11 designed as a punch dies into the die opening of the lower tool designed as a punching die.
The upper tool 11 and lower tool 9 can be used instead of a punch and a punching die as a punch and a bending die for forming workpieces 10.
The upper tool 11 is fixed in a tool holder at a lower end of a plunger 12. The plunger 12 is part of a lifting drive device 13, by means of which the upper tool 11 can be moved in a stroke direction along a lifting axis 14. The lifting axis 14 extends in the direction of the Z-axis of the coordinate system of a indicated in Figure 1 numerical control 15 of the machine tool 1. Perpendicular to the lifting axis 14, the lifting drive device 13 along a positioning axis 16 are moved in the direction of the double arrow. The positioning axis 16 extends in the direction of the Y-direction of the coordinate system of the numerical control 15. The lifting tool 13 receiving the upper tool 11 is moved by means of a motor drive 17 along the positioning axis 16.
The movement of the plunger 12 along the lifting axis 14 and the positioning of the lifting drive device 13 along the positioning axis 16 by means of a motor drive 17 in the form of a drive assembly 17, in particular spindle drive assembly, with a running in the direction of the positioning axis 16 and fixedly connected to the machine frame 2 drive spindle 18. The lifting drive device 13 is guided during movements along the positioning axis 16 on three guide rails 19 of the upper frame leg 3, of which two guide rails 19 can be seen in FIG. The one remaining guide rail 19 is parallel to the visible guide rail 19 and is spaced therefrom in the direction X-axis of the coordinate system of the numerical control 15. On the guide rails 19 run guide shoes 20 of the Hubantriebsvorrichtung 13. The mutual engagement of the guide rail 19 and the guide shoes 20 is such that this connection between the guide rails 19 and the guide shoes 20 can also absorb a load acting in the vertical direction. Accordingly, the lifting device 13 is suspended via the guide shoes 20 and the guide rails 19 on the machine frame 2. Another component of the lifting drive device 13 is a wedge gear 21, by which a position of the upper tool 11 is adjustable relative to the lower tool 9.
The lower tool 9 is received movably along a lower positioning axis 25. This lower positioning axis 25 extends in the direction of the Y-axis of the coordinate system of the numerical control 15. Preferably, the lower positioning axis 25 is aligned parallel to the upper positioning axis 16. The lower tool 9 can be moved directly on the lower positioning axis 16 with a motor drive arrangement 26 along the positioning axis 25. Alternatively or additionally, the lower tool 9 can also be provided on a lifting drive device 27, which can be moved along the lower positioning axis 25 by means of the motor drive arrangement 26. This drive arrangement 26 is preferably designed as a spindle drive arrangement. The lower lift drive device 27 may correspond in structure to the upper lift drive device 13. Also, the motor drive assembly 26 may correspond to the motor drive assembly 17.
The lower lifting drive device 27 is also displaceably mounted on a lower horizontal frame leg 4 associated guide rails 19. Guide shoes 20 of the lifting drive device 27 run on the guide rails 19, so that the connection between the guide rails 19 and guide shoes 20 on the lower tool 9 can also absorb a load acting in the vertical direction. Accordingly, the lifting drive device 27 is suspended via the guide shoes 20 and the guide rails 19 on the machine frame 2 and at a distance from the guide rails 19 and guide shoes 20 of the upper lifting drive device 13. The lifting drive device 27 may include a wedge gear 21, by which the position or height of the lower tool 9 along the Z-axis is adjustable.
By the numerical control 15, both the motor drives 17 for a movement of the upper tool 11 along the upper positioning axis 16, as well as the one or more motor drives 26 for a movement of the lower tool 9 along the lower positioning axis 25 are controlled independently. Thus, the upper and lower tool 11, 9 can be moved synchronously in the direction of the Y-axis of the coordinate system. Likewise, an independent movement of the upper and lower tool 11, 9 are also driven in different directions. This independent movement of the upper and lower tool 11, 9 can be controlled at the same time. By decoupling the movement between the upper tool 11 and the lower tool 9 increased flexibility in the machining of workpieces 10 can be achieved. Also, the upper and lower tool 11, 9 may be formed for machining the workpieces 10 in a variety of ways.
One component of the lifting drive device 13 is the wedge gear 21, which is shown in FIG. The wedge gear 21 comprises two drive-side wedge gear elements 122, 123, and two output-side wedge gear elements 124, 125. The latter are structurally combined to form a structural unit in the form of a driven-side double wedge 126. At the output side double wedge 126, the plunger 12 is rotatably mounted about the lifting axis 14. A motor rotary drive device 128 is housed in the output side double wedge 126 and moves the plunger 12 when necessary along the lifting axis 14. Here, both a left and a right turn of the plunger 12 according to the double arrow in Figure 2 is possible. A plunger bearing 129 is shown schematically. On the one hand, the plunger bearing 129 allows low-friction rotational movements of the plunger 12 about the lifting axis 14, on the other hand supports the plunger bearing 129 the plunger 12 in the axial direction and accordingly carries loads acting on the plunger 12 in the direction of the lifting axis 14, in the output side double wedge 126th from.
The driven-side double wedge 126 is limited by a wedge surface 130, and by a wedge surface 131 of the output-side gear element 125. The wedge surfaces 130, 131 of the output-side wedge gear elements 124, 125 are opposed by wedge surfaces 132, 133 of the drive-side wedge gear elements 122, 123. By longitudinal guides 134, 135, the drive-side wedge gear member 122 and the output side wedge gear member 124 and the drive side wedge gear member 123 and the driven side wedge gear member 125 in the direction of the Y-axis, that is, in the direction of the positioning axis 16 of the Hubantriebsvorrichtung 13, guided relative to each other movable.
The drive-side wedge gear element 122 has a motor drive unit 138, the drive-side wedge gear element 123 via a motor drive unit 139. Both drive units 138, 139 together form the spindle drive arrangement 17th
Common to the motor drive units 138, 139 is the drive spindle 18 shown in FIG. 1 as well as the lifting drive device 13, 27 mounted on the machine frame 2 and consequently supporting structure side.
To the motor drive units 138, 139, the drive-side wedge gear elements 122, 123 are operated such that they move along the positioning axis 16, for example, which results in a relative movement between the drive-side wedge gear elements 122, 123 on the one hand and the output side wedge gear elements 124, 125 on the other hand , As a result of this relative movement of the output side double wedge 126 and the ram 12 mounted thereon is moved along the lifting axis 14 down. The punch mounted on the plunger 12, for example, as an upper tool 11 performs a working stroke and thereby machined on the workpiece support 28, 29 and the workpiece support 8 mounted workpiece 10. By an opposite movement of the drive wedge elements 122, 123, the plunger 12 is again along the Lifting axle 14 is raised or moved upwards.
The above-described lifting drive device 13 according to FIG. 2 is preferably constructed identically as the lower lift drive device 27 and accommodates the lower tool 9.
FIG. 3 shows a schematic diagram of a possible stroke movement of the plunger 12. The diagram shows a stroke course along the Y-axis and the Z-axis. By a superimposed control of a movement of the plunger 12 along the lifting axis 14 and along the positioning axis 16, for example, an oblique lifting movement of the Hubstößels 12 down to the workpiece 10 to be driven, as shown by the first straight line A. Subsequently, after the stroke has been carried out, the plunger 12 can be lifted vertically, for example, as shown by the straight line B. Subsequently, for example, an exclusive movement takes place along the Y-axis in accordance with the straight line C, in order to position the plunger 12 for the workpiece 10 for a new working position. Subsequently, for example, the work sequence described above can be repeated. If, for a subsequent processing step, the workpiece 10 is moved on the workpiece support surface 28, 29, a movement along the straight line C can also be dispensed with.
The illustrated in the diagram in Figure 3 possible stroke movement of the plunger 12 on the upper tool 11 is preferably combined with a stationary held lower tool 9. In this case, the lower tool 9 is positioned within the machine frame 2 such that at the end of a working stroke of the upper tool 11, the upper and lower tool 11, 9 occupy a defined position.
This exemplary superimposed stroke course can be controlled both for the upper tool 11 and the lower tool 9. Depending on the processing of the workpiece 10 to be carried out, a superimposed lifting movement of the upper tool and / or lower tool 11, 9 can be actuated.
4 shows a schematic diagram illustrating a lifting movement of the plunger 12 according to the exemplary illustrated line D along a Y-axis and a Z-axis. Notwithstanding Figure 3 is provided in this embodiment, that a lifting movement of the plunger 12 can undergo a curve or arc curve by a superposition of the movements in the Y direction and Z direction is controlled accordingly by the controller 15. Such a flexible superimposition of the movement movements in the X and Z directions allows specific machining tasks to be solved. The control of such a curve can be provided for the upper tool 11 and / or lower tool 9.
FIG. 5 shows a schematic view of the machine tool 1 according to FIG. On the machine frame 2 of the machine tool 1 extends laterally in each case a workpiece support 28, 29. The workpiece support 28 may for example be assigned to a loading station, not shown, through which unprocessed workpieces 10 are placed on the workpiece support surface 28. Adjacent to the workpiece support surface 28, 29 is a feed device 22, which comprises a plurality of grippers 23 in order to grasp the workpiece 10 placed on the workpiece support 28. By means of the feed device 22, the workpiece 10 is passed through the machine frame 2 in the X direction. Preferably, the feed device 22 can also be moved in the Y direction. As a result, a free movement of the workpiece 10 in the X-Y plane can be provided. Depending on the work task, the workpiece 10 can be moved by the feed device 22 both in the X direction and counter to the X direction. This movement of the workpiece 10 can be adapted to a movement of the upper tool 11 and lower tool 9 in and counter to the Y direction for the respective processing task.
The workpiece support 28 opposite the other workpiece support 29 is provided on the machine frame 2. This may for example be associated with an unloading station. Alternatively, the loading and unloading of the unprocessed workpiece 10 and machined workpiece 10 with workpieces 81 may also be assigned to the same workpiece support 28, 29.
The machine tool 1 can furthermore have a laser processing device 201, in particular a laser cutting machine, which is shown only schematically in a plan view in FIG. This laser processing device 201 can be designed, for example, as a CO 2 laser cutting machine. The laser processing device 201 comprises a laser source 202, which generates a laser beam 203, which is guided by means of a beam guide 204 shown schematically to a laser processing head, in particular laser cutting head 206, and focused in this. Thereafter, the laser beam 204 is aligned by a cutting nozzle perpendicular to the surface of the workpiece 10 to machine the workpiece 10. The laser beam 203 preferably acts on the workpiece 10 at the processing location, in particular the cutting location, together with a process gas jet. The cutting point at which the laser beam 203 impinges on the workpiece 10 is adjacent to the processing point of the upper tool 11 and lower tool. 9
The laser cutting head 206 can be moved by a linear drive 207 with a linear axis system at least in the Y direction, preferably in the Y and Z directions. This linear axis system, which receives the laser cutting head 206, may be associated with, attached to, or integrated with the machine frame 2. Below a working space of the laser cutting head 206, a beam passage opening may be provided in the workpiece support 28. Preferably, a beam collecting device for the laser beam 21 may be provided below the beam passage opening. The beam passage opening and optionally the beam collecting device can also be designed as a structural unit.
Alternatively, the laser processing device 201 may also comprise a solid-state laser as the laser source 202, the radiation of which is guided to the laser cutting head 206 by means of a light-conducting cable.
The workpiece support 28, 29 may extend directly to the workpiece support 8, which surrounds the lower tool 9 at least partially. Within a free space resulting therebetween, the lower tool 9 is movable along the lower positioning axis 25 in and counter to the Y direction.
On the workpiece support 28 is for example a machined workpiece 10, in which a workpiece part 81 is cut free from a cutting gap 83, for example by a punching or by a laser beam processing to a residual compound 82. By this residual connection, the workpiece 81 is held in the workpiece 10 and the remaining skeleton. To separate the workpiece part 81 from the workpiece 10, the workpiece 10 is positioned by means of the feed device 22 to the upper and lower tool 11, 9 for a stamping and Ausschleusschritt. In this case, the residual compound 82 is separated by a punching stroke of the upper tool 11 to the lower tool 9. The workpiece part 81 can be discharged, for example, by partially lowering the workpiece support 8 down. Alternatively, with larger workpiece parts 81, the cut-free workpiece part 81 can be transferred back to the workpiece support 28 or onto the workpiece support 29 in order to unload the workpiece part 81 and the residual grid. Also, small workpiece parts 81 may optionally be discharged through an opening in the lower tool 9.
FIG. 6 shows a perspective view of a tool 31 which is provided with a pendulum stroke for a punching, cutting, stamping and / or forming operation in the workpiece 10. Such a tool 31 is also referred to as a pendulum stroke tool. For the following description of this tool 31, reference is also made to the sectional view of the tool 31 in FIG.
The upper tool 11 comprises a base body 33 and a clamping pin 34 arranged thereon. These have a common position axis 35. The main body 33 and the clamping pin 34 may be integrally formed. Likewise, the main body 33 can be kept clamped to the clamping pin 34. An indexing wedge 36 is provided on the base body 33, by means of which the upper tool 11 is aligned in an upper tool holder of the machine tool 1. The base body 33 has the clamping pin 34 opposite a machining tool 37, which is provided on the base body 33. In this embodiment of the upper tool 11, it is provided that a hold-down surface 501 is provided on an underside of the base body 33. This hold-down surface 501 is preferably aligned at right angles to the position axis 35. Adjacent to the hold-down surface 501, a processing edge 38 of the processing tool 37 is provided. Preferably, two mutually spaced machining edges 38, 39 are provided. Between the processing edges 38, 39, a processing surface 502 is provided in the base body 33, which is recessed relative to the processing edges 38, 39. As a result, a depression 503 is provided starting from the hold-down surface 501 in the base body 33. The at least one machining edge 38, 39 advantageously extends perpendicular to the position axis 35 and preferably along the entire base body 33. This results in a groove-shaped recess, for example, which extends along the entire hold-down surface 501.
The lower tool 9 comprises a base body 41, in which an indexing element, not shown in detail, is provided, which serves for aligning the lower tool 9 in a lower tool holder of the machine tool 1. The lower tool 9 comprises a positioning axis 48. This positioning axis 48 can lie in the lifting axis 30 about which the lower tool 9 is rotatably controllable.
On the main body 41 of the lower tool 9, a bearing surface 47 is provided, which is aligned perpendicular to the position axis 48. Preferably, the support surface 47 is aligned parallel to the hold-down surface 501. In the support surface 47, a counter tool body 93 is provided. In the embodiment, an opening 46 is provided in the support surface 47, in which the counter tool body 93 is positioned. Preferably, this counter tool body 93 is positioned in the bearing surface 47 such that the position axis 48 crosses the counter tool body 93. This bearing surface 47 may further comprise sliding elements 513, which lie in the plane of the bearing surface 47 and minimize friction between the workpieces 10 and the bearing surface 47 of the lower tool 9 during a relative movement.
The counter-tool body 93 is formed as a counter-roller 505, which has at least one counter-edge 506. Preferably, two mutually spaced mating edges 506 and 507 are provided. The distance between the processing edges 38, 39 advantageously corresponds to the distance of the mating edges 506, 507 and the double material thickness of the workpiece 10 to be machined in a forming. When separating the workpiece part 81 from the workpiece 10, the distance between the processing edges 38, 39 corresponds to the distance between the opposing edges 506, 507 and the cutting clearance. Adjacent to or between the two opposing edges 506 and 507, at least one counter edge 506, a processing device 508 is provided, which is raised relative to the support surface 47 and projects in the direction of the upper tool 11. The at least one mating edge 506, 507 is preferably located in the plane of the bearing surface 47. A support surface 509, 510 adjoins the mating edge 506, 507 opposite the machining device 508, which is preferably aligned with the hold-down surface 501. The upper side or upper edge of the sliding elements 513 lies in the plane of the support surface 509, 510. The counter-roller 505 is rotatably supported in the base body 41 of the lower tool 9 by a rotation axis 511. The axis of rotation 511 is advantageously aligned perpendicular to the position axis 48 or parallel to the support surface 47.
The processing device 508 has a counter-surface-shaped counter-surface 521, viewed in cross-section. By means of such a processing device 508 in cooperation with the processing tool 37, a bead 515 can be introduced into the workpiece 10, which has a course corresponding to the counter-surface 521. Due to the configuration of the tool 31 with a counter roller 505, which is used for forming the workpiece 10, this tool 31 is also referred to as a rolling tool, in particular as a roll beading tool or Rollumformwerkzeug.
The production of a bead 515 in the workpiece 10 will be described in more detail below with reference to FIGS. 8 to 10. In the figures 8 to 10 of the tool 31 only schematically simplified, the base body 33 with the machining tool 37 of the upper tool 11 and the base body 41 with the counter tool body 93 of the lower tool 9 is shown.
Between the upper tool 11 and the lower tool 9, a plate-shaped workpiece 10 is positioned. Subsequently, the upper tool and / or lower tool 11, 9 are moved toward each other, in particular along the lifting axis 14, 30, until they are converted into a processing position 516 according to FIG. In this machining position 516, the workpiece 10 is held clamped between the upper tool 11 and the lower tool 9. In this position, the hold-down surface 501 bears against an upper side of the workpiece 10 and holds the workpiece 10 down to the support surface 47 on the lower tool 9. In this machining position 516, the mating surface 521 of the machining device 508 engages the underside of the workpiece 10 and deforms it into the depression 503 on the base body 33 of the upper tool 11. The machining edges 38, 39 are opposite the mating edges 506, 507, specifically at a distance the thickness of the workpiece 10. Due to the increased configuration of the processing device 508 and the opposite positioning of the processing edge 38 to the counter edge 506 and the processing edge 39 to the counter edge 507, the beginning of a bead 515 is introduced.
Subsequently, the upper tool 11 and the workpiece 10 is kept stationary and the lower tool 9 is driven by a movement along the lower positioning axis 25. This is shown in FIG. Due to the movement of the lower tool 9 to the stationary upper tool 11, the bead 515 is introduced into the workpiece 10, which is likewise held stationary relative to the upper tool 11. By provided on the lower tool 9 counter roller 505 with the provided thereon support surfaces 509, 510 and the counter surface 521 of the processing device 508 and the preferably provided sliding elements 513, a low coefficient of friction between the workpiece 10 and lower tool 9 is favored. This first stroke or pendulum stroke, in which the position axes 35 and 48 are offset parallel to each other, is then completed before the counter-roller 505 has reached an end of the processing edges 38, 39 of the processing tool 37.
In a subsequent work step, which is shown in FIG. 10, the upper tool 11 is moved along the upper positioning axis 16. The lower tool 9 and the workpiece 10 remain stationary during this movement. During the movement of the upper tool 11 this can be lifted slightly relative to the workpiece 10. The movement of the upper tool 11 can then be completed when the position axes 35, 38 are aligned again. Also, the traversing movement of the upper tool 11 may be terminated when a rear end portion of the machining edge 38, 39 still holds the workpiece 10 by clamping to the processing device 508.
During the introduction of the bead 515 into the workpiece 10, the distance between the upper and lower tool 11, 9 in the region of the hold-down surface 501 to the bearing surface 47 preferably remains constant.
According to an alternative and not shown embodiment of the tool 31, instead of the counter-roller 505, the processing device 508 may be fixedly provided on the main body 41 of the lower tool 9. The contour and shape of the processing device 508 may correspond to that shown in FIGS. 6 and 7. A fixed processing device 508 can be provided in particular if very thin workpieces or a very soft material of a workpiece are to be processed.
The embodiment of the tool 31 shown in FIGS. 6 and 7 is shown schematically simplified in a side view in FIG. 11, the upper and lower tools 11, 9 being lifted apart from one another. In between, a sectional view of the machined workpiece 10 is shown. This makes it clear that the bead 515 is produced with the machining tool 37 on the upper tool 11 and a machining device 508 on the lower tool 9.
FIG. 12 shows a schematic side view of an alternative embodiment of the tool 31 to FIG. 11. In this embodiment, it is provided that the counter-roller 505 has a processing device 508 with a mating surface 521, which has a cutting edge 520 and an adjoining inclined mating surface 521. This counter surface 521 is formed as an inclined conical surface.
The upper tool 11 includes the machining edge 38, which is opposite to the opposite edge 506. The cutting edge 520 can be guided in the machining position 516 of the upper tool 11 and lower tool 9 along a Abstanzfläche 522, which connects at right angles to the hold-down surface 501 and projects into the recess 503. A processing surface 502 and the depression 503 are, for example, wider than the counter-surface 521 of the processing device 508, so that a further processing edge 39 can come to bear against the support surface 47, for example. By means of such a tool 31 it is possible for a cut 523 to be introduced into the workpiece 10, wherein at the same time a reshaping or embossing takes place in order, for example, to form a gill 524 on the workpiece 10.
FIG. 13 shows an alternative embodiment of the tool 31 to FIG. 12. In this embodiment, it is provided that the processing device 508 likewise has a cutting edge 520, to which, however, a bell-shaped counter-surface 521 adjoins. In addition, the machining edges 38, 39 of the machining tool 37 on the upper tool 11 are assigned to the counter-edges 506 and 507 on the counter-roller 505 of the counter-tool body 93 on the lower tool 9. As a result, a cut 523 and a curved gill 524 can again be formed.
FIG. 14 shows a further alternative embodiment of the tool 31 to FIG. 11. In this embodiment, the upper tool 11 corresponds to the upper tool 11 according to FIG. 11. The lower tool 9 accommodates a counter roller 505 with a machining device 508, in which two mutually spaced cutting edges 520 are provided. In between, the counter surface 521 is formed. The processing device 508 is designed as a cylindrical roller whose circumference is greater than that of the mating edges 506 and 507 and the abutting support surfaces 509, 510. By transferring the upper tool 11 and lower tool 9 into the machining position 516, a respective cut 523 is made between the machining edge 38 and the counter edge 506 and between the machining edge 39 and the counter edge 507. In such a cutting tool, a strip of material can be cut out of the workpiece 10.
FIG. 15 provides a further alternative embodiment of the tool 31. The upper tool 11 comprises as a processing surface 502 a support roller 526. An axis of rotation of this support roller 526 is preferably aligned at right angles to the position axis 35. This can also be oriented inclined to the position axis 35 as a function of the workpiece 10 to be introduced in the contour.
Such a support roller 526 can also be used in the previously described embodiments.
The lower tool 9 has, as a counter-roller 505, a step-shaped or S-shaped counter-surface 521. In this embodiment, it is provided that a free edge of the workpiece 10 is formed, or embossed. In this case, the tool 31 may be referred to as a roll forming tool or roll stamping tool.

Claims

Tool for processing plate-shaped workpieces (10), in particular sheets,

- having an upper tool (11), which has a clamping shaft (34) and a base body (33) which lie in a common position axis (35), and a clamping tool (34) opposite to the base body (33) arranged machining tool (37) having at least one processing edge (38, 39),

- With a lower tool (9), which has a base body (41) with a bearing surface (47) for the workpiece (10) and with a on the main body (41) provided counter body (93), the at least one opposite edge (506, 507) wherein the base body (41) comprises a position axis (48), which is aligned perpendicular to the support surface (47), and

- wherein the upper tool (11) and the lower tool (9) for machining a workpiece (10) arranged therebetween are movable toward each other in a stroke direction and a working plane is formed between the upper tool (11) and the lower tool (9),

characterized,

- That the at least one processing edge (38, 39) of the machining tool (37) extends at least partially along a on the base body (33) provided hold-down surface (501),

- That the counter tool body (93) is formed as a counter-roller (505), which has the at least one counter edge (506, 507) which is the at least one processing edge (38, 39) of the machining tool (37) opposite, and

- That at least one opposite edge (505, 506) adjacent a processing device (508) is provided which has at least one in the longitudinal direction of the processing edge (38, 39) of the machining tool (37) aligned curved counter surface (521).
Tool according to claim 1, characterized in that the at least one machining edge (38, 39) extends along the entire base body (33).
Tool according to claim 1 or 2, characterized in that the at least one machining edge (38, 39) is aligned perpendicular to the position axis (35) and preferably the position axis (35) of the machining tool (37) intersects.
Tool according to one of the preceding claims, characterized in that the machining tool (37) of the upper tool (11) adjacent to the machining edge (38, 39) has a machining surface (502) which preferably in a recess (503) in the base body (33) of Upper tool (11) is provided.
Tool according to claim 4, characterized in that the recess (503) in the base body (33) by the two mutually spaced machining edges (38, 39) is limited, which are preferably spaced parallel to each other.
Tool according to claim 1, characterized in that the counter-tool body (93) about an axis of rotation (511), preferably perpendicular to the position axis (48), in the base body (41) of the lower tool (9) is rotatably mounted.
Tool according to claim 6, characterized in that the counter edge (505, 506) circumferentially on the counter-roller (505) is provided, to which a support surface (509, 510) adjacent to the hold-down surface (501) on the base body (33) of the upper tool (11) is aligned, and preferably in a plane of the bearing surface (47) of the lower tool (9).
Tool according to one of the preceding claims, characterized in that the support surface (509, 510) opposite and adjoining the counter edge (506, 507) is followed by a counter surface (521) of the processing device (508), which in a processing position (516) of Upper tool (11) to the lower tool (9) at least partially engages in the recess (503).
Tool according to one of the preceding claims, characterized in that the mating surface (521) is formed as a forming surface or as a forming surface with a cutting edge (520) adjacent thereto on one side or as a forming surface with a cutting edge (520) delimiting on both sides.
Tool according to one of the preceding claims, characterized in that the machining surface (502) of the machining tool (37) as a support roller (526) is formed.
Machine tool for processing plate-shaped workpieces, preferably of sheet metal,

- with an upper tool (11), which along a lifting axis (14) with a lifting drive device (13) in the direction of a with the upper tool (11) to be machined workpiece (10) and in the opposite direction is movable and which along a perpendicular to the Hubachse ( 14) extending upper positioning axis (16) is positionable and with a drive arrangement (17) along the upper positioning axis (16) is movable,

- With a lower tool (9) which is aligned with the upper tool (11) and which along a lower lifting axis (30) with a Hubantriebvorrichtung (27) in the direction of the upper tool (11) is movable and along a lower positioning axis (25) can be positioned , which is aligned perpendicular to the lifting axis (14) of the upper tool (11) and with a drive arrangement (26) along the lower positioning axis (25) is movable,

- With a controller (15) through which the motor drive assemblies (17, 26) for moving the upper and lower tool (11, 9) are controllable,

characterized,

- That the movement of movement of the upper tool (11) along the upper positioning axis (16) and the movement of the lower tool (9) along the lower positioning axis (25) are each independently controllable, and

- That a tool (31) according to any one of claims 1 to 10 for processing workpieces (10) is provided.
Method for processing plate-shaped workpieces, preferably sheets,

- In which an upper tool (11) along a lifting axis (14) with a lifting drive device (13) in the direction of a with the upper tool (11) to be machined workpiece (10) and in the opposite direction is movable and which along a perpendicular to the lifting axis (14) extending upper positioning axis (16) is positionable, and with a drive assembly (17) along the upper positioning axis (16) is moved,

in which a lower tool (9), which is aligned with the upper tool (11) and can be positioned along a lower positioning axis (25) which is aligned perpendicular to the lifting axis (14) of the upper tool (11), with a drive arrangement (26) along the lower positioning axis (25) is moved,

in which the motor drive arrangements (17, 26) for the movement of the upper and lower tool (11, 9) are actuated by a control (15), characterized

- That a tool (31) according to any one of claims 1 to 10 for machining the workpieces (10) is used, and

- That the upper tool (11) and / or the lower tool (9) are driven with a lifting movement, so that the workpiece (10) between the upper tool (11) and the lower tool (9) is held clamped and

for machining the workpiece (10)

- The upper tool (11) and the lower tool (9) individually or jointly relative to each other about the position axis (35, 48) are rotated or

- The upper tool (11) and the lower tool (9) individually or jointly relative to each other along the positioning axis (16, 25) are moved or

- The upper tool (11) and the lower tool (9) individually or jointly rotated relative to each other about the lifting axis (14, 30) and individually or jointly relative to each other along the positioning axis (16, 25) are moved.
A method according to claim 12, characterized in that for machining the workpiece (10) after the lifting movement of the upper tool (11) and / or the lower tool (9) to hold the workpiece (10) clamped therebetween, a first movement of the lower tool ( 9) relative to the upper tool (11) along the lower positioning axis (25) is driven, so that the counter tool body (93) relative to the machining tool (37) along the lower positioning axis (25) is moved and subsequently a traversing movement of the upper tool (11) along the upper positioning axis (16) is driven while the lower tool (9) is kept stationary.
A method according to claim 12 or 13, characterized in that the movement of the upper tool (11) and the lower tool (9) along the working plane is controlled by a maximum working stroke, wherein the workpiece (10) by the processing edge (38, 39) of the machining tool (37) and the counter surface (521) of the processing device (508) of the counter tool body (93) the workpiece (10) is kept clamped.
Method according to one of claims 12 to 14, characterized in that during the machining of the workpiece (10) a distance of the hold-down surface (501) of the upper tool (11) to the support surface (47) of the lower tool (9) is kept constant.