EP3106241B1 - Machine tool and method for discharging workpiece parts - Google Patents

Description

The present invention relates to a machine tool for punching and / or forming a plate-like workpiece according to the preamble of claim 1, in particular a sheet, and a method for discharging workpiece parts from such a machine tool.

A machine tool in the form of a press for machining workpieces, in particular sheets, is in the generic form EP 2 527 058 A1 described. The machine tool described there has a lifting drive device by means of which a press tool can be moved along a lifting axis. The lifting drive device can in turn be positioned along a positioning axis extending perpendicular to the lifting axis.

In such a machine tool, differently shaped workpiece parts are typically generated during the processing of the plate-like workpiece. Since external sorting devices have a high space requirement, it is favorable if differently shaped workpiece parts are sorted during machining of the workpiece in the machine tool.

From the EP 0 945 196 A2 has become known an apparatus for sorting workpiece parts on a sheet metal stamping machine for cutting workpieces. The sorting device has at least one controllable guide element. Different control states of the guide element are assigned to different Abförderrichtungen of workpiece parts. The device is mounted on a fixed cutting station of the sheet metal stamping machine.

Object of the invention

The invention has for its object to provide a machine tool and a method for discharging workpiece parts, which simplify the sorting of workpiece parts during the machining of a workpiece on the machine tool.

Subject of the invention

This object is achieved by a machine tool of the type mentioned, comprising: a first movement means for moving the workpiece in a first direction, two workpiece support surfaces for supporting the workpiece, between which extending along a second, preferably to the first vertical direction A second movement means for moving a press tool in the second direction, the press tool having two tool components, which are movable relative to each other along a stroke direction to the workpiece in the gap punching and / or deforming to edit, characterized by a in the second direction in the gap (controlled) movable receiving device for storing at least one workpiece part formed during punching and / or forming machining of the workpiece.

The machine tool described herein is a hybrid motion machine tool in which the workpiece is moved in a first direction (X direction) and the press tool in a second direction (Y direction). A first, in the stroke direction (Z direction) upper tool component, e.g. in the form of a punch, and a second lower-stroke tool component, e.g. in the form of a punching die, can be controlled in the Y direction within the gap controlled synchronously or, if necessary, independently. During the relative movement of the two tool components along the stroke direction for machining the workpiece, for example, the second, lower tool component remain stationary along the stroke direction, while the first, upper tool component is moved toward the second tool component in the stroke direction, or vice versa. During the relative movement, both tool components can also be moved along the stroke direction in order to machine the workpiece.

According to the invention, provision is made in the gap or the intermediate space between the workpiece support surfaces in which the press tool is moved to provide a receiving device which can be moved along the gap and which serves to deposit workpiece parts formed during machining of the workpiece. The stored in the receiving device workpiece parts may in particular have a uniform geometry. The receiving device can be moved together with the press tool or possibly one of the tool components in the gap, but it is also possible that the receiving device is mounted on a carriage which is independent of the press tool or of the tool components of the press tool in the second direction is displaceable in the gap. In the simplest case, the or in the Receiving device mounted workpiece parts automatically or manually removed from the receiving device, for example, when this is moved to one of the two outer edges of the gap. A controlled mobility of the receiving device in the gap makes it possible to position the workpiece parts received in the receiving device at different discharge positions along the gap at which the workpiece parts can be discharged, for example, into different collecting containers or the like.

Under a workpiece support surface is understood in the context of this application, a workpiece support, which is suitable to support the plate-shaped workpiece surface. Such a workpiece support surface does not have to form a continuous surface, but it is sufficient if the workpiece is supported at several (at least three, usually significantly more) points by support elements (possibly only selectively) to support the workpiece in a support plane, i. the workpiece support surface is formed in this case by the tops of the support elements. The workpiece support surfaces, between which the gap is formed, may be formed, for example, in the form of a brush or ball table. In this case, the work piece to be machined is supported by many support elements arranged on or in a table surface in the form of brushes or (rotatable) balls, which together form the workpiece support surface. Alternatively, parallel to the gap arranged, rotatable rollers whose axis of rotation extends parallel to the gap may be provided as support elements for forming workpiece support surfaces. In addition, it is possible to design the workpiece support surfaces as circulating support bands.

In a preferred embodiment, the receiving device is attached to one of the tool components of the pressing tool and moved together with the tool component in the gap. The receiving device is in this case typically attached to the lower stroke in the tool component, such as a punching die, and the receiving device is typically at least partially, usually arranged completely below the workpiece plane, which is defined by the tops of the two workpiece support surfaces. The receiving device is in this case Typically, in the gap in the second direction (Y-direction) arranged laterally adjacent to the second tool component, that is, the gap is not widened by the receiving device along the first direction (X-direction). In this case, the receiving device is typically arranged only so far away from the tool component that workpiece parts which are completely separate from the workpiece can reach the receiving device by the action of gravity. For transporting workpiece parts from the tool component to the receiving device, guide devices can serve, for example, in the form of chutes or the like.

In a further preferred embodiment, the receiving device has a parts container for depositing at least one workpiece part, preferably a plurality of workpiece parts. In the simplest case, the parts container is open at the top and serves to deposit a plurality of workpiece parts, which are formed during machining on the workpiece. The workpiece parts are collected in the parts container and can be removed manually or automatically if necessary. The cross section of the parts container preferably increases continuously in the Z direction from the plane of the workpiece support surfaces to the bottom region of the parts container in order to prevent jamming of workpiece parts. The parts container may for this purpose have a conically widening to the container bottom basic shape.

In a further preferred embodiment, the receiving device on a controllable discharge device for discharging stored in the receiving device workpiece parts. The discharge device typically has at least two control states, wherein in a first control state, the workpiece parts remain in the discharge device and are discharged in a second control state from the receiving device, for example via an opening. The discharge device may have, in addition to the second, a third, fourth,... Control state in which, in each case, workpiece parts are removed from the receiving device in different discharge directions. As a rule, all the workpiece parts stored in the receiving device are ejected jointly by the discharge device.

In a further preferred embodiment, the machine tool comprises a control device for moving the receiving device to different discharge positions along the gap, as well as for controlling the discharge device for discharging workpiece parts at the different discharge positions along the gap. The control device serves for the numerical control of the machine tool, for example the first and the second movement device and a lifting drive. If the receiving device is attached to a tool component of the pressing tool, the control device acts on the second movement device in order to move the receiving device to a respective discharge position along the gap. If the receiving device is displaceable in the gap by means of its own movement device or its own drive, the control device acts on this movement device or on the drive in order to position the receiving device at a predetermined discharge position along the gap. If the receiving device is movable independently of the tool component along the gap, this can be moved between a respective discharge position for discharging workpiece parts and a position adjacent to the tool component, at which the receiving device receives workpiece parts which are formed on the tool component.

The reject positions are typically predetermined positions in the second direction (Y direction) along the nip. At a respective discharge position, for example, a collecting container or the like may be arranged in order to collect workpiece parts discharged from the receiving device via the discharge device. The collecting containers can be arranged, for example, in a row along the second direction laterally next to the gap in order to collect or sort workpiece parts. In particular, two rows of collecting containers may be provided, which are arranged below a respective workpiece support surface laterally next to the gap. The collecting containers in one or possibly both rows can be arranged, for example, on a trolley, which is positioned next to the gap or the machine frame and, if necessary, aligned with the aid of positioning aids relative to the machine or to the gap.

In a preferred development, the controllable discharge device has at least one pivotable flap, which has a first pivot position for supporting workpiece parts stored in the receiving device and a second pivot position for removing workpiece parts from the receiving device. A first switching position of the discharge device in this case corresponds to the first pivot position of the pivotable flap and a second switching position of the discharge device corresponds to the second pivot position of the pivotable flap. In the first pivot position of the flap, this forms on its upper side a bearing surface for workpiece parts. For this purpose, the flap in the first pivot position typically (approximately) extends horizontally or (approximately) parallel to a workpiece support plane formed by the workpiece support surfaces. In the second pivoting position, the flap is oriented at a larger angle to the horizontal or to the workpiece support plane (downward), so that the workpiece or parts slide in the second pivot position on the top of the flap and are discharged in this way from the receiving device.

In a preferred embodiment, a pivot axis of the pivotable flap is aligned parallel to the second direction. In this case, by pivoting the flap from the first to the second pivot position, the workpiece part (s) are laterally, i. transversely to the gap, discharged in the direction of one of the two workpiece support surfaces, between which the gap is formed. As described above, a plurality of collecting containers can be arranged on one or optionally on both sides of the gap, in which the workpiece parts are discharged.

In a further preferred embodiment, the flap has a third pivot position for the removal of workpiece parts from the receiving device, wherein a discharge direction in the second pivot position differs from a discharge direction in the third pivot position. By pivoting the flap in the second or third pivot position, the workpiece parts can be discharged along different discharge directions be recorded and, for example, in different collection containers become. For example, the flap may be turned to the right from the first, typically substantially horizontal, position into the second pivot position and to the left in the third pivot position, or vice versa. If the pivot axis runs parallel to the second direction (Y direction) in this case, the workpiece parts are discharged laterally to a first side of the gap along the first discharge direction and discharged laterally to a second side of the gap along the second discharge direction. In this way, the workpiece parts can be discharged, for example, in receiving containers, which are positioned on both sides of the gap laterally to the gap. This is favorable because in this way the number of receptacles at which the workpiece parts can be received laterally from the gap is increased.

In a further preferred development, the pivotable flap forms a bottom region of the parts container. In this embodiment, the receiving device has a parts container for collecting workpiece parts, the bottom region of which forms a flap which is moved into the second (or possibly the third) pivot position in order to discharge workpiece parts from the parts container. In principle, the workpiece parts can also be removed from the parts container in a manner other than by a pivotable flap. For example, the bottom region of the parts container may have one or more regions which are not pivoted for discharging workpiece parts but are moved laterally in order to produce an opening in the bottom region of the parts container.

In a preferred embodiment, the machine tool comprises a further pivotable flap which is formed on a side region of the parts container, wherein the further pivotable flap in a first pivot position adjacent to the formed by the pivotable flap bottom portion of the parts container and wherein the further pivotable flap in a second Pivoting position is spaced from the bottom portion of the parts container, so that between the bottom portion and the opened further flap an opening in the side region of the parts container is formed. The further flap is typically hinged at its upper edge to the side or at a side region of the parts container and is made of the first, lower Pivoting position, in which the flap closes the side portion of the parts container, moves to the second, upper pivot position, in which the further flap pivots outwardly and an opening in the side region of the parts container releases. The flap and the further flap are preferably pivoted synchronously, ie they reach the first and second pivot positions substantially simultaneously. Typically, the pivot axes of the flap and the further flap are aligned in parallel and spaced from each other. By the further flap, the opening which is generated when pivoting the bottom portion forming the flap in the second pivot position can be increased. In this way, even in the event that the flap in the second pivot position has only a comparatively small angle, for example, less than about 30 ° to the horizontal, comparatively large stored in the parts container workpiece parts are discharged.

Preferably, the pivotable flap and the further pivotable flap are coupled for movement via a coupling gear, for example. A movement coupling means that both flaps can be pivoted synchronously from the first to the second pivot position and vice versa via a single actuator. For the motion coupling, it proves to be advantageous if the pivot axes of the two flaps are aligned parallel to each other.

It is understood that the receiving device does not necessarily have to have a parts container to accommodate or collect a plurality of workpiece parts. Rather, the pivotable flap in the first pivot position form a bearing surface on which, if necessary, several workpiece parts are collected before the workpiece parts are discharged by the flap in the second or possibly a third, fourth, ... pivoting position is pivoted. As described above, the workpiece parts positioned on the flap forming a deposit surface can be moved together with the lower tool component in the second direction along the nip and brought to a suitable discharge position along the nip. The flap may possibly be mounted pivotably about more than one pivot axis, as in the cited above EP 0 945 196 A2 which is incorporated herein by reference in its entirety.

It is not absolutely necessary that the receiving device has a storage surface which is formed on a pivotable flap. For example, the shelf as in the EP 0 945 196 A2 described be formed at the top of an endless conveyor belt, which is used as a discharge device of the receiving device and which serves in a first switching position in which the conveyor belt is not moved, for storing workpiece parts and which serves as a discharge device in a second or possibly third switching position to eject laterally on the conveyor belt stored workpiece parts. The endless conveyor belt can in particular be reversible in its direction of movement to discharge workpiece parts in a second or third switching position on both sides of the gap.

In a further preferred development, the discharge device has at least one discharge chute for discharging workpiece parts out of the receiving device in a discharge direction extending transversely to the second direction. The workpiece parts can be moved along the discharge chute in a direction transverse to the gap and, for example, received in collecting containers or the like. An upper end of the discharge chute typically follows the flap pivoted into the second, third, ... pivot position. The receiving device may in particular have two discharge chutes, which are mounted on opposite sides of the parts container or on opposite sides of a pivotable flap or rocker to auszuschleusen workpiece parts on different sides of the gap.

In a further preferred embodiment, the receiving device has a feed chute for feeding workpiece parts from one of the tool components of the pressing tool. The tool component of the pressing tool can be, for example, a punching die. The feed chute is typically formed for feeding workpiece parts from the tool component to the receiver substantially along the second direction (Y direction). At the bottom of the feed chute For example, an upper opening of the parts container or a storage surface can be arranged, on which the workpiece part is deposited before it is discharged. The workpiece parts can tilt after the punching and / or forming processing by the action of gravity on the feed chute, provided that their focus is on the feed chute. But it is also possible to spend the workpiece parts on the feed chute by the tool component to which the receiving device is mounted, performs a relative movement to the workpiece part, which is so fast that the tool component is pulled away below the workpiece part, so that the workpiece part from the tool component to the adjacently arranged feed chute.

In a further preferred embodiment, the machine tool has a sensor device for detecting workpiece parts which pass through the feed chute or which project upwards out of the parts container. The sensor device can be designed, for example, as a light barrier or as a light grid, in which a plurality of light barriers are arranged next to one another in order to enable a planar detection of workpiece parts. The sensor device can be arranged at the lower end of the feed chute. If the receiving device is designed as a parts container, the sensor device can monitor the upper opening of the parts container at which the feed chute opens.

The machine tool may alternatively or additionally comprise a (further) sensor device for detecting workpiece parts which pass through the respective or a respective discharge chute. The sensor device may be attached for this purpose at the lower end of the discharge chute. The sensor device can be designed, for example, as a light barrier or as a light grid.

Another aspect of the invention relates to a method for discharging workpiece parts from a machine tool as described above, the method comprising: moving the receiver in the second direction along the gap until one of a plurality of reject positions along the gap is achieved, and discharging at least one stored in the receiving device workpiece part at the Ausschleusposition. As described above, by the method of the receiving device in the gap, a sorting of workpiece parts can be made by these are discharged at different Ausschleuspositionen along the gap from the receiving device. If the removal device is moved together with a tool component of the pressing tool in the gap, the machining of the workpiece for the removal is optionally interrupted until the one or more workpiece parts are discharged. However, it may also be possible to discharge one or more workpiece parts from the discharge device parallel to the machining of the workpiece at the discharge position.

In a variant of the method, a relative movement for conveying the workpiece part from the tool component into the receiving device takes place between one of the tool components of the pressing tool and a workpiece part resting on the tool component. In this case, a movement of the tool component in the second direction, which is so fast that the tool component is pulled away under the workpiece part, so that it is conveyed by the tool component - possibly via a feed chute - in the adjacent receiving device, even if the center of gravity of the workpiece part is not above the feed chute.

The illustrated and described embodiments are exemplary in describing the invention.

Fig. 1

eine schematische Darstellung eines Ausführungsbeispiels einer Werkzeugmaschine in Form einer Stanzpresse mit einer in einem Spalt verfahrbaren Aufnahmeeinrichtung zur Ablage von Werkstückteilen,

Fig. 2a-d

vier schematische Darstellungen einer Aufnahmeeinrichtung mit einem Teilebehälter zur Aufnahme von Werkstückteilen, sowie

Fig. 3a,b

zwei Darstellungen einer Aufnahmeeinrichtung mit einer schwenkbaren Klappe in einer ersten und zweiten Schwenkstellung.

Show it:

Fig. 1

1 a schematic representation of an exemplary embodiment of a machine tool in the form of a stamping press with a receiving device movable in a gap for depositing workpiece parts,

Fig. 2a-d

four schematic representations of a receiving device with a parts container for receiving workpiece parts, and

Fig. 3a, b

two representations of a receiving device with a hinged flap in a first and second pivot position.

In the following description of the drawings, identical reference numerals are used for identical or functionally identical components.

Fig. 1 shows an example of a machine tool 1 in the form of a punch press, which is formed in the example shown for punching and, if necessary, for forming a plate-like workpiece 2 in the form of a sheet metal. The machine tool 1 comprises a first movement device 3, which in Fig. 1 is indicated by a double arrow to the workpiece 2 resting on two workpiece support surfaces 4a, 4b shown in dashed lines in a first direction (hereinafter: X-direction) of an in Fig. 1 to move the displayed XYZ coordinate system. The workpiece support surfaces 4a, 4b may be formed, for example, at the top of workpiece tables, which are provided with rollers for the support of the workpiece 2. The first movement device 3 may have a coordinate guide which clamps the workpiece 2 laterally and moves in the X direction over the workpiece support surfaces 4a, 4b.

The machine tool 1 has a machine frame 5 arranged between the workpiece support surfaces 4a, 4b, in the example shown O-shaped, which encloses a frame interior 6, which forms the processing region of the stamping press. In the frame interior 6, a gap 7 is formed between the workpiece support surfaces 4a, 4b, which extends along a second direction (in the following: Y direction) perpendicular to the X direction. A second movement device 8 serves to move a pressing tool 9 in the Y direction along the gap 7. The pressing tool 9 comprises a first, upper tool component in the form of a punch 9a and a second, lower tool component in the form of a punching die 9b. The punching die 9b has a die opening into which the punch 9a dips when punching the workpiece 2. For the movement of the punch 9a along a stroke direction (in the following: Z-axis), the machine tool 1 a lifting drive 10 which acts on a plunger, at the lower end of the punch 9a is mounted.

The second movement device 8 comprises an upper and lower drive spindle 11 a, 11 b, which are rotatably connected to the machine frame 5 and attached to the spindle nuts of the linear actuator 10 with the punch 9a and the punching die 9b, to these in the Y direction method. For this purpose, the second movement device 8 has a motor drive not shown in detail, with which the punch 9a and the punching die 9b can be moved synchronously in the gap 7 or in the frame interior 6. If necessary, the second movement device 8 can be designed to displace the punching die 9b independently of the punching punch 9a in the Y direction. For this purpose, the second movement device 8 may have two separately controllable drives, but it is also possible that the movement device 8 has for this purpose only a motor drive and the synchronous process of the punch 9a and the punching die 9b via a mechanical coupling gear.

In the example shown, the machine tool 1 has a receiving device 12 for the storage of workpiece parts 2a (see. Fig. 2c ), which were separated from the workpiece 2 during punching processing. The receiving device 12 is movable in the gap 7 in the Y direction and in the example shown on the punching die 9b, more precisely attached to a connected with this punching console, mounted, which forms part of the spindle nut of the lower drive spindle 11b. The receiving device 12 also forms part of the spindle nut of the lower drive spindle 11b and can be moved together with the punching die 9b in the gap 7 with the aid of the second movement device 8.

The machine tool 1 has a control device 13 which numerically controls, inter alia, the first and second movement means 3, 8 and the lifting drive 10. The control device 13 is formed in the case shown, or programmed, the receiving means 12 together with the punch die 9b controlled to different Ausschleuspositionen Y _A1, ..., Y _A3 along the gap 7 to move to the receiving device 12 stored workpiece parts 2a laterally auszuschleusen from the gap 7. The control device 13 selects the discharge position Y _A1 ,..., Y _A3 as a function of the type, in particular the geometry, of the workpiece parts 2a stored in the receiving device 12. At a respective Ausschleusposition Y _A1 , ..., Y _A3 is in the in Fig. 1 shown in each case a box-shaped collecting container 14 arranged to receive the stored in the receiving device 12 and at the Ausschleusposition Y _A1 , ..., Y _A3 discharged workpiece parts 2a. With the help of the receiving device 12 can be discharged in this way workpiece parts 2a depending on their type or their geometry in different collection container 14 and thus sorted. It is understood that in Fig. 1 For simplicity of illustration, only three receptacles 14 are shown, but typically receptacles 14 are arranged along the entire extent of the gap 7 in the Y direction.

For discharging workpiece parts 2a at a respective discharge position Y _A1 ,..., Y _A3 , the receiving device 12 has a discharge device 15, which is described below with reference to FIG Fig. 2a and Fig. 2b will be described in more detail. The receiving device 12 has in the in Fig. 2a, b Example shown a box-shaped parts container 16, can be stored and collected in the workpiece parts 2a. The parts container 16 has a cross section that widens toward the bottom portion to prevent jamming of workpiece parts 2a. In the example shown, the discharge device 15 has a pivotable flap 17, which forms a bottom region of the parts container 16. The flap 17 is of an in Fig. 2a shown first, substantially horizontal pivot position S1 for supporting workpiece parts 2a in an in Fig. 2b shown second pivot position S2 pivotable. In the first pivot position S1, the flap 17 closes the parts container 16, in the second pivot position S2, the flap 17 is inclined downwards by approximately 30 ° with respect to the first pivot position S1, whereby the workpiece parts 2a resting on the flap 17 at the top of the flap 17 slide along to empty the parts container 16 and auszuschleusen the workpiece parts 2a laterally from the gap 7. A pivot axis 18 of the pivotable flap 17 extends in the Y direction, so that the workpiece parts 2a are discharged via the flap in a discharge direction A1 which extends in a plane transverse to the Y direction and thus transversely to the gap 7. At the in Fig. 2a, b As shown, the discharge device 15 has an actuator in the form of a pneumatically actuated by means of the control device 13 cylinder 19 (see. Fig. 2d ) mounted on the outside of the parts container 16 for pivoting the swingable flap 17 from the first pivot position S1 to the second pivot position S2 and vice versa. As described above, the angle between the first pivot position S1 and the second pivot position S2 of the flap 17 in the example shown is only approximately 30 °, so that the flap 17 located between the lower end of the second pivot position S2 and the parts container 16 formed opening has a relatively low height.

To increase the opening and thus facilitate the emptying of the parts container 16, the discharge device 15 in the example shown, a further pivotable flap 20 which is attached to a side portion of the parts container 16 and hinged approximately at the level of the lower third of the side region is connected to the parts container 16. The further flap 20 borders in a first, in Fig. 2a shown in the first pivot position S1 flap 17 and forms in the first pivot position S1 part of the side wall of the parts container 16. On the flap 17 resting workpiece parts 2a are thus in the first pivot position S1 of the further flap 20 on the side Falling out of the parts container 16 prevented. In the example shown, the further flap 20 is movably coupled on the side region of the parts container 16 with the flap 17 at the bottom region of the parts container 16 via a mechanical coupling mechanism 21. By the movement coupling, the further flap 20 is pivoted synchronously with the flap 17 in the actuation of the actuator 19 and the cylinder, so that the flap 17 and the further flap 20 are pivoted together from the first pivot position S1 to the second pivot position S2, and vice versa. In the in Fig. 2b shown second pivot position S2, the further flap 20 is pivoted by an angle of about 30 ° upwards and is laterally beyond the side region of the parts container 16 via. In the second pivot position S2, the further flap 20 is thus spaced from the flap 17 forming the bottom region and increases the height of the opening, via which the parts container 16 can be emptied. Due to the enlarged opening and comparatively large workpiece parts 2a can be discharged from the parts container 16.

Fig. 2c shows a detail of the receiving device 12 with the lower end of the parts container 16, in which the pivotable flap 17 and the further pivotable flap 20 are arranged in the second switching position S2. As in Fig. 2c can be seen, the discharge device 15 has a discharge chute 22, which adjoins the located in the second pivot position S2 flap 17 to auszuschleusen workpiece parts 2a along the discharge direction A1 transverse to the Y-direction and thus transversely to the gap 7. As in Fig. 2c It can also be seen that a light barrier 23c is formed at the lower end of the discharge chute 22 between a transmitter 23a and a receiver 23b in order to detect workpiece parts 2a which have passed through the discharge chute 22 and thus into one of the in Fig. 1 Tray 14 shown were spent. At a portal above the lower end of the discharge chute 22, a reject plate 24 is attached to guide the workpiece parts 2a along the discharge direction A1 to a respective collection container 14. The deflector plate 24 prevents workpiece parts 2a due to process-related vibrations skip the photocell 23c and possibly the collecting container 14.

Fig. 2d shows a sectional view of the upper edge of the parts container 16, on which a sensor device 25 with formed on opposite sides of an upper opening of the parts container 16 transmitter 25a and receiver 25b, between which a flat light grid 25c is generated to monitor whether workpiece parts 2a from the parts container 16 projecting upwards, ie to check whether the parts container 16 is completely filled.

The sensor device 25 also makes it possible to monitor whether a workpiece part 2a has passed a feed chute 26 for feeding workpiece parts 2a from the punching die 9b to the parts container 16 or to the receiving device 12 or not. For this purpose, the light grid 25c of the sensor device 25 is formed at the lower end of the feed chute 26. As in Fig. 2a-d can also be seen, the feed chute 26 at its upper end a collar 27, which the circular outer contour of the punching die 9b partially surrounds laterally. If workpiece parts 2a are to be conveyed into the parts container 16 whose center of gravity is not above the feed chute 26 after the cutting of the workpiece 2, a relative movement between the punching die 9b and the workpiece back 2a resting thereon can be generated by the punching die 9b in Y Direction in the gap 7 is moved so fast that the punching die 9b pulled away under the workpiece part 2a and the feed chute 26 is positioned below the workpiece part 2a.

The parts container 16 may be provided on its upper side with a (not shown) workpiece support surface, which is moved with the receiving device 12 in the gap 7. It is understood that in this case, between the supply chute 26 and the workpiece support surface remains a lateral opening which is large enough to spend workpiece parts 2a in the parts container 16. Also on the punching die 9b, if necessary, parts of a workpiece support surface can be attached, which is moved in the gap 7 with the punching die 9b.

Fig. 3a, b show a further example of a receiving device 12, which differs from that associated with Fig. 2a-d described recording device 12 differs in that no parts container 16 is provided for collecting workpiece parts 2a: In the in Fig. 3a, b Rather, a workpiece part 2a is placed directly on a flap 17, which at the same time is part of a discharge device 15 and which is located in Fig. 3a is in a first, horizontal pivot position S1. Optionally, a plurality of workpiece parts 2a can be stored or collected on the serving as a support surface flap 17 before they are discharged from the discharge device 12. The pivotable flap 17 can for this purpose in a second, in Fig. 3a, b not illustrated pivot position S2 are pivoted, in which the resting on the flap 17 workpiece part 2a along a first discharge direction A1 via a fixed discharge chute 22 in a in Fig. 3a, b Not shown collecting container is discharged, which can be arranged for example laterally next to the gap 7 under the second workpiece support surface 4b of the machine tool 1.

Fig. 3b shows the flap 17 in a third pivot position S3, which is about 30 ° relative to the in Fig. 3a shown first pivot position S1 is inclined downwards. In the third pivot position S3, the workpiece part 2a is conveyed to a further discharge chute 22a, along which the workpiece part 2a can slide and be collected in a collecting container, not shown, which can be arranged below the first workpiece support surface 4a of the machine tool 1, for example. In the Fig. 3a, b Shown receiving device 12 thus allows a discharge of workpiece parts 2a on both sides of the gap 7. The in Fig. 2a-d Shown receiving device 12, more specifically their discharge device 15, may optionally be formed such that workpiece parts 2a can be discharged to both sides of the gap 7.

In the Fig. 3a, b Recording device 12 shown has analogous to in Fig. 2a-d shown receiving device 12 a feed chute 26 to carry workpiece parts 2a of the punching die 9b to the pivotable flap 17. The flap 17, which can be pivoted about a pivot axis 18 parallel to the Y direction, has a stop 28 on its side opposite the feed chute 26. The flap 17 is pivoted by means of an actuator in the three different pivot positions S1 to S3, wherein the actuator, for example, as in the EP 0 945 196 A2 may be formed described. The flap 17 may possibly also be pivoted about more than one pivot axis, as also in the EP 0 945 196 A2 is described.

In place of the pivotable flap 17, the in Fig. 3a, b shown recording device 12, for example, have a possibly reversible in its direction endless conveyor belt are placed on the workpiece parts 2a and with the workpiece parts 2a either to one of the two Ausschleusrutschen 22, 22a or possibly directly into the collection container 14 can be transported laterally are arranged next to the gap 7.

In the case of the machine tool 1 described above, the movement of the pressing tool 9 or the punching die 9b in the gap 7 is used in an advantageous manner for workpiece parts 2a at different discharge positions Y _A1 ,. Y _A3 auszuschleusen, so that even in the machine tool 1, a sorting of different workpiece parts 2a can be made. It is understood that instead of a pressing tool 9 with a punch 9a and a punching die 9b, other pressing tools 9 can be used in the machine tool 1, for example pressing tools 9, which have a bending punch and a bending die. As an alternative to the above described common movability of the punching die 9b and the receiving device 12 in the gap 7, it is also possible to move the receiving device 12 independently of the punching die 9b in the gap 7. The receiving device 12 can be controlled from a position adjacent to the stamping die 9b in which these workpiece parts 2a receive, and moved independently of the stamping die 9b to different discharge positions Y _A1 ,..., Y _A3 along the gap 7. As soon as the workpiece parts 2a accommodated in the receiving device 12 have been ejected at the discharge positions Y _A1 ,..., Y _A3 , the receiving device 12 can be moved into a position adjacent to the stamping die 9b in the gap 7 in order to again receive workpiece parts 2a.

Claims (14)

1. Machine tool (1) for processing a plate-like workpiece (2), in particular a metal sheet, by stamping and/or shaping, comprising:

   a first movement device (3) for the movement of the workpiece (2) in a first direction (X),

   two workpiece supporting surfaces (4a, 4b) for supporting the workpiece (2), a gap (7) extending in a second direction (Y), preferably perpendicular to the first direction, being formed therebetween,

   a second movement device (8) for the movement of a pressing tool (9) in the second direction (Y), wherein the pressing tool (9) comprises two tool components (9a, 9b) which are able to be moved in a stroke direction (Z) relative to one another in order to process the workpiece (2) in the gap (7) by stamping and/or shaping, characterized by a receiving device (12) which is able to be moved in the second direction (Y) in the gap (7) for depositing at least one workpiece part (2a) formed when processing the workpiece (2) by stamping and/or shaping.
2. Machine tool according to Claim 1, wherein the receiving device (12) is attached to one of the two tool components (9b) and is able to be moved in the gap (7) together with the tool component (9b).
3. Machine tool according to Claim 1 or 2, wherein the receiving device (12) comprises a parts container (16) for depositing at least one workpiece part (2a).
4. Machine tool according to one of the preceding claims, wherein the receiving device (12) comprises a controllable ejection device (15) for ejecting workpiece parts (2a) deposited in the receiving device (12).
5. Machine tool according to Claim 4, further comprising:

   a control device (13) for the controlled movement of the receiving device (12) at different ejection positions (Y_A1, ... Y_A3) along the gap (7) and for controlling the ejection device (15) for ejecting workpiece parts (2a) at the different ejection positions (Y_A1, ... Y_A3).
6. Machine tool according to Claim 4 or 5, wherein the controllable ejection device (15) comprises at least one pivotable flap (17) which has a first pivoted position (S1) for supporting workpiece parts (2a) deposited in the receiving device (12) and a second pivoted position (S2) for ejecting workpiece parts (2a) from the receiving device (12).
7. Machine tool according to Claim 6, wherein a pivot axis (18) of the pivotable flap (17) is aligned parallel to the second direction (Y).
8. Machine tool according to Claim 6 or 7, wherein the pivotable flap (17) has a third pivoted position (S3) for ejecting workpiece parts (2a) from the receiving device (12), wherein an ejection direction (A1) in the second pivoted position (S2) differs from an ejection direction (A2) in the third pivoted position (S3).
9. Machine tool according to one of Claims 6 to 8, wherein the pivotable flap (17) forms a bottom region of the parts container (16).
10. Machine tool according to Claim 9, further comprising: a further pivotable flap (20) which is formed on a side region of the parts container (16) and which in a first pivoted position (S1) is adjacent to the bottom region of the parts container (16) formed by the pivotable flap and which in a second pivoted position (S2) is spaced apart from the bottom region of the parts container (16), wherein the pivotable flap (17) and the further pivotable flap (20) are preferably coupled together in terms of movement.
11. Machine tool according to one of Claims 5 to 10, wherein the ejection device (15) comprises at least one ejection chute (22, 22a) for ejecting workpiece parts (2a) from the receiving device (12) in an ejection direction (A1, A2) preferably extending transversely to the second direction (Y).
12. Machine tool according to one of the preceding claims, wherein the receiving device (12) comprises a feeding chute (26) for feeding workpiece parts (2a) from one of the tool components (9b) of the pressing tool (9).
13. Machine tool according to Claim 12, further comprising: a sensor device (25) for detecting workpiece parts (2a) which pass the feeding chute (26) or which protrude upwardly out of the parts container (16).
14. Method for ejecting workpiece parts (2a) from a machine tool (1) according to one of the preceding claims, the method comprising:

    moving the receiving device (12) in the second direction (Y) along the gap (7) until one of a plurality of ejection positions (Y_A1, ... Y_A3) along the gap (7) is reached and

    ejecting at least one workpiece part (2a) deposited in the receiving device (12) at the ejection position (Y_A1, ... Y_A3).

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