FI67314B - PERFORERINGS- OCH / ELLER SKAERSTATION - Google Patents

Description

6731 4 Punching and / or cutting station

This invention relates to a punching and / or cutting station having one or more punching and / or cutting units and means for moving these and the workpiece, the station being provided with a gripping device adapted to grip the workpiece. and to pull it to a specified point or points relative to the work units.

Punching and / or cutting stations of this type are previously known, which have mechanical means for moving the workpiece to the machining units and in different positions. However, these actuating members are adapted to remain in their grip throughout the transfer and machining operation. As a result, the line associated with the piercing and / or cutting station becomes unusually long. This is, of course, disadvantageous for space and cost reasons.

Of the known devices, for example, U.S. Pat. No. 4,023,780 discloses a machine with means for gripping a workpiece and moving it in the work plane in perpendicular directions to each other by means of separate transfer motors. The workpiece itself remains in the grip of the clamping jaws 20 throughout machining. No jaw removal and movement to the other side of the workpiece will occur. Handling large pieces with such a device is cumbersome and the use of a continuous tape is not possible at all.

U.S. Pat. No. 3,606,810 again discloses a device in which the gripping jaws are placed on an endless chain and pull the workpiece from the edge forward. No pulling and pushing movement of the gripping jaw arranged in accordance with the invention takes place, but the device forms a conventional long and space-consuming assembly, in which only, for example, pulling of the strip for cutting is recommended.

U.S. Pat. No. 3,611,858 discloses a traction machine for pulling mainly beams through a punching machine and precisely positioning a workpiece for punching. The device becomes very long. 35 also implements the implement described in CH Pantent Publication 540,751.

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The object of the invention is therefore to eliminate the above-mentioned drawbacks by presenting a structure which makes it possible to shorten the line to at least half of the conventional ones and even below it. The most essential thing for the invention is that the workpiece is gripped. during the work steps, the transfer device moving it detaches and moves past the workpiece to the other side so that its original e.g. traction movement becomes a work-movement movement. This is achieved mainly by first removing the transfer device from the workpiece and then causing it to move below or above the path of movement, in which position it is then preferably moved parallel to the workpiece to the other side and again to the original plane relative to the workpiece. Preferably, the transfer device first performs a pulling movement on the workpiece coming from the feed line-1b and then after moving to the other side thereof. Of course, in some cases, these functions can be reversed. The invention is known in more detail from the features defined in the claims.

To illustrate the invention, reference is made to the accompanying drawings, which schematically show an example of a punching and / or cutting station according to the invention in its various stages of operation, Fig. 1 showing a transfer device the transfer device moving to the push side of the workpiece, Fig. 5 the transfer device coming into contact with the workpiece, Fig. 6 in the push grip to the workpiece and Fig. 7 and b in the respective operations, however, the punching and / or cutting pile slightly more fully shown.

The position according to the invention comprises a variable number of punching and / or cutting units 3- They are preferably arranged on slides, in which they can be moved in a direction perpendicular to the trajectory of the workpiece 35 from the side. The devices are suitably on either side of the workpiece path and the structure can generally be modulimamen.

II

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Instead of a guitar body, the actual tool may be supported on a bridge that crosses the path of movement of the workpiece and is attached to both sides. The workpiece 2 comes along a suitable line, not shown in more detail, known per se, 5 whereby its gripping point is between the jaws 4 and 6 of the transfer device. The jaw 4 is locked up and down by a hydraulic cylinder 7, by means of which the workpiece 2 is pressed between said jaws. From this initial position, a movable transfer device with a guide 9 suitable for the conductors 10 is pulled by a chain 11 attached to the frame 9 and a stepper motor 1 driving it, to a position specified for the workpieces 3 of the workpiece. The height position relative to the workpiece 2 can be changed by means of arms 6, which are ln-spawned by pneumatic cylinders 8 in the body 9 · Vetolnk-15 at a certain stage, with one or some pins or other tools of the work units 3 holding the workpiece 2, jaws 4 and 5 is removed from the workpiece by means of a cylinder 7. After removal, the clamping device 4, 5, b, 7, 8, 9 is moved by some further distance by means of the stepper motor 1 and the chain 11 20 so that the jaws 4 and 5 can be lowered a suitable distance below the workpiece 2 by means of the arms 6 and cylinders 8. the transfer device can again be driven back via guides 10 via a stepper motor and a chain. At a suitable point at the rear edge of the workpiece 2, the clamping device is stopped and raised to a suitable height relative to the workpiece so that the jaws 4 and 5 can again engage the workpiece 2 by the cylinder 7 when the clamping device is driven back into the workpiece by the motor 1. After gripping the workpiece, the clamping device can be made to push the workpiece 2 step by step past the work units 3 via the motor 1 and the chain 11. After all the work steps have been completed, the clamping device naturally stops, disengages from the workpiece 2 in the manner described above, and then hands it over to the discharge line, which is not shown in more detail. The clamping device is then driven by the motor 1 again on the inlet side of the station exactly to a specified position 4 6731 4 to wait for a new workpiece, whereby the cycle described above can be restarted.

It has been shown above that the clamping device moves below the workpiece to its edges. It is clear, however, that this transition can also be arranged to take place from another side, for example above the workpiece. In the same way, of course, any other obstacle in the path of the workpiece can be bypassed. This is the case, for example, when the punching and / or cutting unit is supported by a bridge-like structure over the working path of the workpiece. During the movement of the clamping device, the workpiece 2 can also be held in place by a member other than the actual tool, which is not otherwise shown in more detail than the example of the punch 12, where the plunger 15 effectively holds the workpiece in place when the clamping device is released and moved. The other control of the workpiece is also not shown in more detail above, only the guide rollers 13 are shown.

All functions are controlled in a manner known per se by means of 20 electronic control centers and sensors, so that the movements take place precisely and in a suitable order. The station according to the invention can be assembled from modules which can be simply placed on a beam frame provided with guides of suitable length for the clamping device 25 4-9.

It is clear that the invention is not limited to the application example presented above, but that many other structures can be presented within the scope of the following claims.

Claims (7)

1. Perforation and / or cutting station includes one or more perforation and / or cutting units, means for moving them and the workpiece, stations being provided with a gripping device (4 ... 9) adapted to grip 5 at the workpiece (2) and pulling it to a particular point or points in relation to the work units (3), characterized in that the working work units cooperating with the gripping device are adapted to release the grip from the work piece and move past it (2) and / or the work units. (3) to their opposite side and slide the workpiece (2) to another or different points. Perforation and / or cutting station according to claim 1, characterized in that the perforation and / or cutting unit or units (3) are adapted to maintain the grip of the workpiece (2) during the time of the gripping device (4). ..9) loosening from the workpiece, transferring to the other side and fastening again, to hold the workpiece in place. 20 3 · Perforation and / or cutting station according to claim 1 or 2, characterized in that in the gripping device (4, 5, 6, 7, 8, 9) there is an engaging, most suitable hydraulically functioning ratchet, jaws (4, 5). ), which are adapted to a frame (9) movable in guide (10), in which the jaws can be moved, most conveniently pneumatic, perpendicular to the movement path of the workpiece (2). 4. Perforation and / or cutting station according to claim 3, characterized in that the jaws of the gnp device (4 ... 9) can be moved below or above the workpiece (2) and / or the working units (3) - 5. Perforation and / or cutting station according to claim 1, 2, 3 or 4, characterized in that the gripping device (4 ... 9) can be moved to the other side of the workpiece (2) and / or the working units 35 (3) in the direction of motion of the trajectory with respect to guides (1U) with