JPH0593692U - Controller for transfer press - Google Patents

Abstract

(57) [Abstract] [Purpose] Compared to the stop position of the ram in the conventional transfer press, the stop position on the transfer side stops while holding the work, so it is difficult to maintain the mold, and this is solved. Even if the ram stops at top dead center, the transfer side aims to return to the origin. [Structure] An operation program synchronized with the vertical movement of the ram 7 and a return operation program are separately provided in the position control device 27 of the transfer device 25, while the press control device 33 controls the vertical movement of the ram and the position control is performed. Device 25
The ram 7 is stopped at the top dead center by switching the two programs described above by the press control device 33, and the transfer device 25 is always stopped at the origin by the return operation program.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a transfer press control device for setting a start / stop position of a transfer in a transfer press.

[0002]

[Prior Art]

 Conventionally, a press having a transfer feeding device uses the rotation of the crank shaft that drives the press ram as a drive source, and introduces the drive force into at least one of the drive units provided on the left and right sides of the bolster on the press bed surface. Then, materials, semi-finished products, and finished products (hereinafter simply referred to as works) were transferred.

Therefore, the movement of the work to the next process (referred to as the X-axis direction) and the upper die provided on the ram and the lower die on the bolster approach or separate from each other, The movement in the direction of gripping and releasing the work (referred to as the Y-axis direction) must be precisely synchronized with the rotation angle of the crankshaft (ram movement) that drives the ram of the press. The start / stop position of the ram was stopped at the feed midpoint, the clamp end, or the lift end when the ram stopped at the top dead center position of the crankshaft. Further, in the case where the ram is stopped within the range of 30 ° to 60 ° in the crankshaft angle, the feed end, the clamp end, or the lift end is in the stop position.

[0004]

[Problems to be solved by the device]

 In the transfer start / stop position described above, in the former and latter cases, the transfer stops while clamping the workpiece, so there is a problem that die maintenance is extremely difficult.In the latter case, With regard to (1), the ram is lower than the former, so it is difficult to work, and in particular, the machined work remains in the mold, so there is a problem that it must be operated separately and taken out.

The present invention has been made in view of the above circumstances, and an object thereof is to stop the press at a fixed point which is a top dead center and automatically transfer the transfer to a return end or an unclamp end. , A transfer press control device for moving to the down-end position and improving workability.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, a transfer press control device of the present invention is a transfer press including a transfer mechanism for feed, clamp, and lift movements linked to an up-and-down movable ram. Press control device, a position control device that controls the feed, clamp, and lift motions of the transfer, and a synchronization that causes the position control device to operate the transfer in synchronization with the ram by a command from the press control device. An operation program and a return program that returns to the origin position with the ram at the top dead center, the feed as the return end, the clamp as the unclamp, and the lift as the down end according to a command from the press controller. It is characterized by being prepared.

[0007]

[Action]

 In the transfer press control device having the above-described structure, when the ram is lowered from the top dead center and the position control device is operated, the ram is moved up and down. In addition, in synchronization with the vertical movement of the ram, a synchronous operation program is operated to cause the transfer feed, clamp and lift to perform desired movements, thereby performing desired press working. When the operation of the press is stopped by the command of the position control device, the latter program is activated, and the feed is stopped at the return end, the clamp is unclamped, and the lift is stopped at the downend.

[0008]

【Example】

 Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

2 to 4, the transfer press 1 includes a substantially C-shaped frame 3 when viewed from the side, and a lower mold (not shown) mounted on a bed provided below the frame 3. A bolster 5 for freely mounting and a ram 7 above the frame 3 for mounting an upper mold (not shown) freely are provided.

A first actuating device 9 is provided on the left side of the bolster 5, and a second operating device 11 is provided on the right side thereof. Between the first actuating device 9 and the second actuating device 11, feed bars 13A and 13B are installed in parallel with each other in parallel with the upper surface of the bolster 5, and the ends thereof are Is also supported by the first actuating device 9 and the second actuating device 11.

On the inner sides of the feed bars 13A and 13B, a plurality of clamp claws 15 corresponding to each other one by one are provided, and Vs for sandwiching the work W at the tips corresponding to each other. Character-shaped claw portions 17 are provided respectively. The clamp motor 19, the feed motor 21 and the lift motor mounted on the first actuator 9 or the second actuator 11 on either side of the first actuator 9 in this embodiment. A transfer device 25 is formed which is operated by a motor 23. A transmission shaft and a gear (neither of which are shown) are interlockingly connected to the actuator on the side where the motors 19, 21, and 23 are not mounted, and the first actuator 9 and the second actuator The operating device 11 and the operating device 11 of FIG.

As shown in FIG. 5, the clamping motor 19 causes the clamping claw 13 to move closer to each other, or the unclamping motion m3 to move the clamping claw 13 away from each other. In the clamped state, 21 performs a feed movement m2 for moving the clamp claw 13 in the horizontal direction or a return movement m4 for moving the clamp claw 13 to the start position. The lift motor 23 is adapted to perform a lift motion m5 for raising the clamp claw 13 or a down motion m6 for lowering the clamp claw 13.

The operation of the transfer device 25 described above is performed by a signal from the position control device 27 as shown in FIG. The position control device 27 is connected to an angle detector 31 provided in the vicinity of an eccentric shaft 29 for moving the ram 7 up and down, and the eccentric shaft 29 is rotated by an eccentric shaft position detection signal from the angle detector 31. It is designed to be operated in synchronization with. Further, the position control device 27 is provided with a preset synchronous operation program EMP and a return operation program RMP for returning the transfer apparatus 27 after the press drive is stopped regardless of the angle detector 31. The switching between these two programs is set by the press control device 33 provided separately.

The press control device 33 includes push button switches 35 and 37 for starting / stopping the transfer press 1, a rotary cam 39 provided on the drive shaft of the eccentric shaft 29 for setting a stop effective range, and the rotary cam. A signal from a limit switch 41 attached to 39 is inputted and a control signal is mutually communicated with the position control device 27.

As shown in FIGS. 6 and 7, the transfer press 1 having the above-described configuration turns on a press start push button switch 35 of the press control device 33, and a press start command issued from the press control device 33. Activates the position controller 27 to prepare the synchronous operation program EMP. In response to this preparation, when the angle detector 31 detects the 225 ° angular position of the eccentric shaft 29, the Z-phase input enters the position control device 27 and the synchronous operation is started.

With this synchronous operation start, the clamp claw 15 first reaches the clamp end from the unclamp position, and the work W is clamped by the claw portion 17 of the clamp claw 15. When this clamping is completed, the lifting motor 23 lifts the clamp claw 15 to the lift end position while clamping the workpiece W. When the lift reaches the lift end, the feed motor 21 moves the clamp claw 15 to the adjacent position, the clamp claw 15 is down-ended from the lift end, and the work W is placed on the next lower die, and then the clamp is performed. The workpiece W in the end state becomes the unclamping state, and the ram 7 of the press reaches the bottom dead center while the clamp claw 15 returns to the return end state, and performs the predetermined pressing.

Hereinafter, during the movement of the ram 7 to the top dead center, the unclamping state is changed to the clamping end state, the work W is clamped by the clamping claws 15, and the lift operation and the feed operation are repeated as described above. . All of this operation is accurately performed because it is operated by the synchronous operation program EMP.

When the press working is performed by the above operation and the press stop push button switch 37 is instructed to stop the press operation, the press control device 33 causes the limit switch 41 to move one of the rotary cams 39 past the 15 ° position 270. Check that the eccentric shaft 29 is in the range of the ° position, issue a signal, and stop the ram near the top dead center.

On the other hand, the angle detector 31 detects the 315 ° position of the eccentric shaft 29 based on the signal input from the press control device 33 to the position control device 27, and the return operation program RMP causes the clamping motor 19 and the feed motor to be fed. The motor 21 and the lift motor 23 are controlled respectively.

The state of the transfer device 25 at 315 ° is the lift end with the clamp claw 15 being the clamp end and holding the work W, and the feed is at the return end position. Position where the feed is moved to the feed end by moving the feed motor 21 regardless of the above, the work W is moved to the adjacent die to lower the lift, and the clamp is unclamped to move the feed to the return end. That is, the transfer device 25 is returned to the original position and stopped.

As described above, in the transfer press 1 of the present embodiment, the clamp motor 19, the feed motor 21, and the lift motor 23 that operate the transfer device 25 are set in the synchronous operation program of the position control device 27. By controlling the EMP and the return operation program RMP separately and controlling the timing by the press control device 33, the press is stopped at a fixed point (top dead center), and the transfer device 25 is set to the origin (return end, unclamp end). , Down-end) operation is improved, which improves the mold maintenance and improves workability.Also, the work is always carried out and finished, so the production numbers are consistent and the maintenance of the clamp jaws is maintained. There are many advantages that can be improved.

The setting of the press angle timing can be changed depending on the number of strokes per minute of the press, and the number of clamp motors, lift motors, feed motors, etc. can be changed. Further, the present invention is not limited to the above-described embodiments, but can be implemented in other modes by making appropriate changes.

[0023]

[Effect of the device]

 As described above, according to the present invention, since the construction is as described in the scope of claims for utility model registration, the ram of the press is stopped at the fixed point which is the top dead center, and the transfer device is always returned. Since it returns to the origin of unclamp end and down end, it has the advantages of improving workability and productivity of the transfer press, and improving die replacement and clamp nail maintenance.

[Brief description of drawings]

FIG. 1 is a block diagram of a transfer press controller according to an embodiment of the present invention.

FIG. 2 is a front view of a transfer press equipped with the control device for the transfer press of FIG.

3 is a side view of the transfer press of FIG.

FIG. 4 is a plan view of a feed bar and clamp claws incorporated in the transfer press of FIG.

FIG. 5 is an operation explanatory view for explaining the movement of the clamp claw of FIG.

FIG. 6 is a flowchart of the transfer machine shown in FIGS. 1 to 3.

FIG. 7 is a sequence control diagram according to the flowchart of FIG.

[Explanation of symbols]

 1 Transfer Press 7 Ram 19 Motor for Clamp 21 Motor for Feed 23 Motor for Lift 25 Transfer Device 27 Position Control Device 29 Eccentric Shaft 31 Angle Detector 33 Press Control Device 39 Rotary Cam

Claims (1)

[Scope of utility model registration request] 1. A transfer press comprising a feed, clamp, and a transfer for performing a lift motion, which is linked to an up-and-down movable ram, the press control device controlling the ram, the transfer feed, the clamp, Position control device for controlling the lift movement, and to this position control device, by a command from the press control device,
A synchronous operation program for operating the transfer in synchronization with the ram and a command from the press control device, the ram at the top dead center, the feed as a return end, the clamp as an unclamp, and the lift as a down end. A transfer press control device comprising a return program for returning to a position.