DE3246096A1 - Transfer device for presses - Google Patents

Abstract

A press comprises a transfer device for transferring workpieces from a feed station to a processing station. The transfer device comprises a rail (8) which extends in the longitudinal direction of a bed (6) of the press and is attached in front of the housing (1) of the press with the aid of retention arms (7). The retention arms (7) are each secured on one side face of the housing (1). A main block (9) can be moved along the rail (8) in front of the front side of the housing (1). A lifting element (13) secured on the main block (9) can be moved in the vertical direction and a transfer unit (20) secured on the lifting element (13) can be moved backwards and forwards in relation to the housing (1) transversely to the longitudinal direction of the bed (6). The transfer device furthermore comprises drive units for driving the main block (9), the lifting element (13) and the transfer unit (20). <IMAGE>

Description

DESCRIPTION

The invention relates to a transfer device for presses.

Such transfer devices are used to transfer workpieces to a press to feed the workpieces from a processing station on a table or a To transport the press to the next and the pressed products out of the bed To be found in the press.

Among known transfer devices used in presses some have two transfer drive units on either side a press housing are mounted, as well as two # between the drive units attached transfer carriers, with other transfer devices are drive units mounted in front of the housing of the press and arranged in such a way that with the help of the drive units at least one transfer support is movable to and fro. The ones described above However, devices have the disadvantage that the drive units and the transfer support or transfer arms free access to mounted on a platen of the press Tools hinder and in this way the inspection and maintenance of the tools difficult by the staff. The maintenance work is therefore proportionate take a lot of time.

Transfer devices are also known in which two feed carriers are provided with multiple grippers or claws and are right-angled or rectangular-shaped Perform movements. For other transfer facilities, the include Feed Carrier several clamps that can be moved in the vertical direction and oscillating in the longitudinal direction are. In both known transfer devices, however, the step size is at the supply or removal of the workpieces or products on the loading side or input side and constant on the acceptance side of the press. Therefore, in the event that the distance between the position of the workpiece on the loading side and the processing station inside the press is greater than the distance between the individual processing stations the press, an idle or buffer station can be provided on the loading side. This increases the time and costs involved in changing the tools.

Furthermore, in conventional transfer devices for presses Transfer elements such as suction cups, grippers or the like on the in two or three dimensions movable feed carriers or on the feed carriers with the help of Screws, bolts or brackets attached. When one transfer item through another To be replaced, a worker must remove the clamps or screws by hand loosen and / or replace with new ones. The replacement of the transfer elements is therefore laborious and time consuming.

The invention aims to remedy the above-mentioned disadvantages more conventional Transfer facilities to overcome and a transfer facility for presses too make the maintenance and inspection of the press tools simple and easy can be carried out in a short time.

It should also be possible that the step size at Respectively of the workpieces to the press from the increment when the workpieces are transported on differs from one processing station to the next.

The transfer elements attached to the free end of the transfer device to capture the workpieces should be automatically exchangeable.

The invention results in detail from the characterizing part of the main claim. Advantageous further developments of the invention are set out in the subclaims specified.

A transfer device according to the invention comprises one in the longitudinal direction or the rail running in the transport direction of the workpieces in front of the front a housing of the press is attached. Retaining arms are used to fasten the rail which are each attached to one side of the press housing and to the outside or protrude forward from the side surfaces of the housing. A main block is in front arranged on the front of the press housing and freely movable along the rail. A lifting element mounted on the main block is freely movable in the vertical direction and carries a transfer unit that is free in relation to the press housing in front of and back, i.e., can be moved transversely to the transport direction of the workpieces.

The main block, lifting element and transfer unit are each provided with a drive device.

The above-mentioned transfer unit preferably comprises several transfer elements, which are so arranged in the longitudinal direction of a bed of the press at a distance from one another are that the Distance between one of the transfer elements and a group the other transfer elements is adjustable.

The transfer elements are preferably designed such that they to be attached to a holder or detached from the holder by the holder is moved back and forth with respect to the press housing. On one side are several magazine compartments arranged at vertical intervals outside the housing. In these compartments, transfer elements of different shapes are stored in such a way that that they can be automatically coupled to the transfer device by the transfer device along the rail laterally over the side end of the Press housing moved out and the holder is moved back and forth.

The following is a preferred embodiment of the invention explained in more detail with reference to the drawings.

FIG. N is an overall perspective view of a press according to FIG a preferred embodiment of the invention; Figure 2 is a plan view of the exemplary embodiment from FIG. 1; 3 and 4 illustrate the transport of workpieces in a press according to the invention; Fig. 5 and 6 illustrate the mode of operation of transfer devices in the press according to the invention; Fig. 7 is a perspective view of an embodiment of one in accordance with the present invention Press inserted transfer element; Fig. 8 is an enlarged, partially cut-away View of a fastening area of a transfer element; Fig. 9 illustrates replacing the transfer element; Fig. 10 is a schematic side view a magazine for transfer elements.

According to Fig. 1, a press housing 1 comprises a housing upper part 2, a housing middle part 3 and a housing lower part 4 in a C-shaped arrangement. At the upper part 2 is fitted with a carriage 5 that is freely movable in the vertical direction, while a bed 6 is mounted on the lower part 4.

A rail 8 is formed by holding arms arranged transversely to its longitudinal direction 7 supported, which are attached to both side walls 2a of the upper housing part 2 and protrude outward from the side surfaces 2a, so that the rail 8 before Press housing 1 runs. A main block 9 is mounted so that he along the rail 8 is slidable in the longitudinal direction of the bed 6, as shown by an arrow X is indicated.

The main block 9 has a longitudinal bore into which a rod 11 is fitted in such a way that it is in a cylinder with the aid of a piston rod 12 is displaceable in the vertical direction (in the direction of an arrow Z).

A lifting element 13 is attached to the rod 11.

The lifting element 13 has a transverse bore 14 into which a rod 15 is fitted so as to be oriented in a direction (shown by an arrow Y) is displaceable perpendicular to the direction X. The rod 15 is with a piston rod 16a of a piston 16 connected. A holder 17 is attached to the rod 15. In a longitudinally extending bore 18 of the holder 17 is a transport rod 19 is inserted in such a way that it is slidable in the longitudinal direction of the bed 6, i.e. in the direction of the arrow x, is movable. A first transfer element is located on the transport rod 19 201 such as a suction cup or the like attached so that it can be with the help of a cylinder not shown in the longitudinal direction of the bed 6 is slidable.

In addition, a fastening rod 21 is attached to the holder 17, fixedly attached to the second, third and fourth transfer elements 202, 203 and 204 are.

Figure 2 is a schematic plan view of the press, the first, second, has third and fourth press stations B1, B2, B3 and B4. In this figure is with a denotes a pallet loaded with a number of workpieces b, which in this way is arranged to be with the aid of a cylinder c in the direction of the outlines arrows shown to a loading station of the press housing 1 can be transported is With a conveyor for the removal of pressed products is referred to, which is attached to a Removal station of the press housing 1 is attached. The reference character e denotes a pallet to be loaded with the pressed products in the direction of the through Dotted outline arrows shown is movable.

If the main block 9 in the longitudinal direction of the bed 6 (or in the Direction X) is moved to the right, the one described above becomes a total of 20 the designated transfer device is moved from the loading station to the acceptance station, and, when the lifting element 13 is moved in the vertical direction and the transfer device 20 raises and lowers, the workpieces b are from the loading station to the pressing station transferred, and after pressing, the pressed products are taken to the take-off station transported further.

If in this case workpieces b only to the second press station B2 are to be transported and pressed there, the workpieces only need to be moved in the manner described below.

As shown in Figure 3, all that is required is the workpieces b alternately from a first workpiece supply station A'1 over a step width X1 to be transported to the second press station B2 and when a state is reached in which there is no longer any workpiece in position A'1, workpieces from a second workpiece feed position A ″ 1 to the position B2. In the latter case the step size is around the value oc is greater than the step size X1. Finally, the pressed products still have to be marked with a Step size X2 can be transported to an acceptance position A2.

In this way, the workpieces can b on a variety of different Positions are discontinued.

The reference symbol Z denotes a vertical stroke and the reference symbol Y is a transverse movement, i.e. movement in a direction perpendicular to the transport direction of the workpieces.

In the event that the workpieces b with the tools in the second, third and fourth press station B2, B3 and B4 processed ~: those should, needs the device to be operated only in the manner shown in FIG.

Furthermore, since the first transfer element 201 in the transport direction of Workpieces or moved in the direction of the other transfer elements 2021203 and 204 can be moved by moving the transport rod 19 in its longitudinal direction, the step size for the workpiece feed on the feed or loading side can differ set by the step size when removing the products on the acceptance page will.

Therefore, even in the case that the distance 1 between the position A1 of the workpiece on the loading side where the workpiece is taken from the stack be, and the first Press station B1 larger than the distance L3 between the individual pressing stations B1, B2 and B3 is as shown in FIG is, the workpieces are transported in sequence without an idle or Buffer station would have to be provided.

Furthermore, if the workpieces b only one by one in the second press station B2 are to be processed, as shown in Figure 6, so the transfer element 201 is moved by a distance L4 while the main block is moving 9 moved in the longitudinal direction, so that the workpieces b only to the second press station B2 to be transferred. Furthermore, the products pressed in the press station B2 b has been transferred to an acceptance position A2, in which the transfer element 202 is moved by a distance L5.

When the tools of the press described above are inspected or serviced are to be, the main block 9 is in a waiting position outside of the area of the press housing 1 shifted, as indicated by dashed lines. In this way, the maintenance and inspection work can be carried out without difficulty can be carried out in a short time.

For moving the main block 9, the lifting element 13 and the rods 15, 19 pinion and rack and pinion arrangements or equivalent devices are used.

As shown in Figure 7, the above-mentioned second, third and fourth transfer elements 202, 203 and 204 each because of one Arm of a three-armed component 22 attached, which is integral with a fastening rod 23 is formed. The fastening rod 23 is detachable from the previously mentioned one Fixing rod or arm 21 attached.

A cylinder tube is attached to the arm 21 with the aid of screws or bolts 24 attached, the inner peripheral wall 24a of which has a bore 25 with a larger diameter having. A cylindrical component 26 is fitted into the bore 25.

The component 26 and the cylinder tube 24 have through bores 27 and 28, respectively, through which the above-mentioned fastening rod 23 extends. In the cylinder tube 24, a piston 29 is mounted so that it is free in the longitudinal direction of the bed 6 is displaceable and with its end faces a first chamber 241 and a second chamber 242 bounded. The piston 29 includes a locking piece 31, which is formed as a lock on the fastening rod 23 recess 30 is inserted or can be brought into engagement therewith. The locking piece 31 of the piston 29 is conductive in one direction from the recess by a spring 32 31 biased away. The arrangement is such that when pressurized fluid in the first chamber 241 is introduced, the locking piece 31 is displaced and enters recess 30.

In the event that the second, third and fourth transfer elements 202, 203 and 204 are to be exchanged, the main block 9 becomes a lateral one The end of the press housing 1 is moved so that the holder 17 is opposite a magazine D, as shown in FIG. The holder 17 is then towards the rear of the press housing 1 shifted, so that the second to fourth transfer elements 202 to 204 enter a predetermined compartment D1 of the magazine D. Afterward the Hubele- ment 13 lowered, and the transfer elements 202 to 204 are deposited within subject D1. As can be seen in Fig. 10, at the same time hits a projection 22a of the three-armed component 22 on the compartment D1 so that the movement of the component is limited in a suitable position.

When the pressurized fluid is drained from the first chamber 241 and the piston 29 is displaced by the force of the spring 32 in such a way that the locking piece 31 emerges from the recess 30, and if further the holder 17 is moved forward the cylinder tube 24 is pulled off the fastening rod 23. To this In this way, the transfer elements 202 to 204 are released from the arm 21.

If then the lifting element 13 in the vertical direction in a a magazine compartment D2 opposite position is moved by the desired Transfer elements 202 to 204 are accommodated, and the holder 17 again in the direction is advanced to the rear of the case 1, the fixing rod 23 occurs into holes 27 and 28. Then pressurized fluid is in the first chamber 241 initiated, so that the piston 29 moves therein and the locking piece 31 comes into engagement with the recess 30. This way the new transfer items 202 to 204 attached to the arm 21.

Then the lifting element 13 is raised and the holder 17 in Retracted towards the front of the press housing 1. This will be the transfer elements 202 to 204 are removed from the compartment D2, so that the transfer operation is continued.

The transfer elements 20 can in this way automatically new or differently designed transfer elements are set. The exchange takes place with the help of what is actually required for normal transfer operation used transfer facility.

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Claims (4)

PRESS TRANSFER FACILITY v PRIORITY: December 15, 1981, Japan No. 185727/81 No. No. 185729/81 PATENT CLAIMS U Transfer device for presses, g e k e n'nz e i c h n e t by a lengthways in front of the front of a Press housing (1) attached rail (8), each attached to a side surface (2a) of the housing (1) fixed and protruding outward from the side surfaces (2a) Holding arms (7) is mounted, one in front of the front of the press along the rail (8th) movable main block (9), one vertically movable on the main block (9) mounted lifting element (13), one in front of and in relation to the press housing (1) Transfer unit (20) and drive devices attached to the lifting element (13) so as to be movable back to drive the main block (9), the lifting element (13) or the transfer unit (20) 2. Transfer device according to claim 1, g e k e n nz e i c h n e t by a Number of transfer elements (201, 202, 203 and 204) in such a way in the longitudinal direction a bed (6) of the press are arranged at a distance from one another that the distance at least one (201) of the transfer elements (201 to 204) with respect to a group of the other transfer elements (202 to 204) is adjustable. 3. Transfer device according to claim 2, characterized in that g ek e n n z e i c h n e t that at least one of the transfer elements (201 to 204) with the aid of a Holder (17) is releasably attached to the press housing (1) that it is through Moving the holder (17) back and forth with respect to the housing (1) freely on and can be decoupled. 4. Transfer device according to claim 3, characterized g ek e n n z e i c h n e t that on one side of the press housing (1) outside this housing a magazine D with compartments D1, D2, ... to accommodate several different transfer elements Form is provided which compartments at a predetermined perpendicular distance from one another are arranged, and that the transfer elements by moving the The holder (17) can be inserted or inserted into the magazine in relation to the press housing (1). can be removed from the magazine.