JPH02117724A - Work posture adjuster - Google Patents

Abstract

PURPOSE:To surely and optionally adjust the posture of a work carried into a transfer press by controlling the respective actuators of plural lifters individually to be lifted and lowered and positioning the top of each filter to a target height. CONSTITUTION:A sheet material is drawn by a drawing press 10 and a work obtained is pulled out by a roller conveyor 12 and removed onto a conveyor 15 through a turnover 13. Then, this work is transferred to a work carrying-in position P of a transfer press 11. At least three lifters 15-18 are arranged on both sides of the transfer line l here to support the lower surface of the work at many points. The columns 151-181 of three lifters 15-18 are provided with actuators composed of servo motors 154-184 with a pinion each and rods 152-182 with a rack each to vertically move tables 153-183 supporting works. Each of these actuators is controlled individually by a controller (not shown in figure) to position the top of each lifter 15 at the target height and adjust the posture of each work and then carry the work into the transfer press 11 through a transfer bar 111.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for adjusting the posture of a workpiece carried into a transfer press.

[Conventional technology]

A workpiece to be processed by a transfer press (hereinafter referred to as a workpiece) is transported by a conveyor or the like to a workpiece loading position of the press. After this work is held by the fingers 2 of the transfer bar 1 illustrated in FIG.
The transfer bar 1 transfers the material to a mold (not shown).

[Problem to be solved by the invention]

FIGS. 9 and 10 show the workpieces 3 and 4 that have been transported to the workpiece loading position P shown in FIG. 8, as viewed from the entry side and the right side of the arrow, respectively.

In the case of the workpiece 3 shown in FIG. 9, the direction of the edge 3a and the direction of the fingers 2 do not match, and therefore, the holding of the workpiece 3 by the fingers 2 becomes uncertain.

On the other hand, in the case of the workpiece 4 shown in FIG. 10, the position of the right finger 2 and the position of the edge 4a of the workpiece 4 no longer match, making it impossible for the finger 2 to hold the workpiece 4.

An object of the present invention is to eliminate such inconveniences.

[Means to solve the problem]

The workpiece posture adjustment device according to the present invention is disposed at a workpiece loading position of a transfer press to support the lower surface of the workpiece at multiple points, and includes at least three lifters each equipped with a lifting actuator, and a top portion of each lifter. The lifter is configured to include a control means for individually controlling the actuators of these lifters so that the lifters are positioned at the target height.

[Effect]

According to the above configuration, the height of each lifter is changed by controlling the actuator of each lifter by the control means, and thereby the carrying-in attitude of the workpiece with respect to the transfer press is adjusted.

〔Example〕

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

FIG. 1 shows a combination press line having a double acting draw brace 10 and a transformer 7 abrasive 11. As shown in FIG.

In this combination press line, a sheet material is drawn by a draw press 10, and the processed product (hereinafter referred to as a work) is drawn onto a roller conveyor 12 by an unloader (not shown).

The workpiece pulled out to a predetermined position on the roller conveyor 12 is turned over by the turning operation of the arm 131 of the turnover 13, and is placed upside down on the table 141 of the lifter 14.

Next, the table 141 of the lifter 14 is lowered.

As the table 141 descends, the workpiece is placed on the conveyor 15, and then the workpiece is conveyed by the conveyor 15 to the workpiece loading position Hp.

At the workpiece loading position iP, four lifters 15 to 18 as shown in FIG. 2 are arranged.

The lifter 15 includes a support 151, a rod 152 supported vertically on the support 151, a table 153 attached to the top of the rod 152, and a servo motor 154 for raising and lowering the rod 152. There is.

A pinion (not shown) driven by a motor 154 is built into the support column 151, and this pinion meshes with a rack formed on the rod 152. Therefore, by rotating the motor 154 in the forward and reverse directions, the table 153 moves up and down.

The other lifters 16 to 18 also have the same configuration as the lifter 15 and perform similar operations.

The lifters 15, 17 are arranged symmetrically with respect to the axis l of the workpiece conveyance path. Further, the lifters 16 and 18 are arranged at positions closer to the transfer press 11 by a predetermined distance from the lifters 15 and 17, respectively.

Note that the distance between the lifter 15 (16) and the lifter 17 (18) is set larger than the width of the conveyor 15.

FIG. 3 shows the servo motors 154 to 15 of each lifter 15 to 18.
184 is shown.

In the figure, a pulse generator 191 is operated by a camshaft that drives the transfer bar 111 of the transfer press 11, and outputs a pulse signal having a frequency corresponding to the rotational speed of the camshaft.

The command signal generating section 192 has a so-called pulse distribution function, and distributes the output pulses of the pulse generator 191 to generate signals from a pulse train for positioning each table 153 to 183 of each lifter 15 to 18 at a target height. command signal 8
1 to S4, and servo CPU193-1 to 193
-Add each to 4.

Note that the signal generation process in the command signal generation section 192 is as follows:
It is necessary to perform this in synchronization with the operation of the transfer press 11, and therefore a synchronization signal is input from the transfer press 11 to the generating section 192.

Further, the target height of each lifter 15 to 18 is input to the command signal generation section 192 by means such as a keyboard (not shown).

Each of the lifters 15 to 18 has built-in speed generators 155 to 185 and one-node encoders 156 to 186 that are interlocked with motors 154 to 184, respectively, and the speed generators represent the moving speeds of the tables 153 to 183. The output signals of 155 to 185 are sent to the servo CPU 193-1 as speed feedback signals, and the output signals of pulse encoders 156 to 186 representing the amount of movement of tables 153 to 183 are used as position feedback signals.
~193-4 is input.

In the servo CP0193-1, a speed command is created based on the deviation between the integrated value of the pulses of the signal Sl and the integrated value of the output pulses of the pulse encoder 156, and furthermore, the deviation between this speed command and the output of the speed generator 155 is created. Desired. Then, a drive signal corresponding to this deviation is sent to the servo amplifier 19.
4-1 to the servo motor 154.

As a result, the table 183 of the lifter 15 is moved to the target height.

Note that the other servo CPUs 93-2 to 193-4 and servo amplifiers 194-2 to 194-4 also perform the same functions as the servo CPU 193-1 and servo amplifier 194-1.

According to this embodiment, each of the lifters 15 to 18 can be raised or lowered to individual target positions in the same period of time.

Therefore, for example, as shown in FIG. 4, the lifter 15°17 is raised from the reference lower limit position H0 shown in FIG. 1 to the target height Hl, and the lifter 16°18 is raised from the position H0 to the target height H2 (>Hl ), conveyor 1
5, it is possible to pitch the workpiece 20 that has been conveyed horizontally.

Further, as illustrated in FIG. 5, if the lifter 1516 is raised from the position Ho to the target height H3 and the lifter 17.18 is raised from the position Ho to the target height Hl (>Hl), the workpiece 20 The posture can be rolled.

Therefore, when the workpiece 3 as illustrated in FIG. 9 is transported to the workpiece loading position P, by performing the pitching described above, it is possible to align the edge 3a of the workpiece 3 in the direction of the finger 2. In addition, when a workpiece as shown in FIG. 10 is transported to the workpiece loading position P, the workpiece 4 is
The height of the edge 4a of the finger 2 can be made to match that of the finger 2.

Note that the above-mentioned lifting operation of each of the lifters 15 to 18 is performed immediately before the transfer press 11 performs the work holding operation. After this holding operation is completed, each lifter 15-18 is lowered to the reference lower limit position H0 shown in FIG.

The workpiece posture adjustment device shown in the above embodiment can of course be effectively applied to a combination press that is not equipped with a turnover 13.

Further, the posture adjustment device of the above embodiment has four lifters 15 to 1.
8, but rolling and pitching of the workpiece is possible even with three lifters.

In this case, the axis t! of FIG. As shown in FIG. 6 or 7, three lifters 21 to 23 are arranged with respect to JL. In this embodiment, in order to allow the lifter 23 to rise, it is necessary to configure the conveyor 15 in two rows, for example.

The present embodiment can also be effectively applied to a transfer press disclosed in Japanese Patent Application No. 107495/1983 filed by the applicant of the present invention, in which a workpiece is suctioned and held using vacuum pressure.

〔Effect of the invention〕

As is clear from the description of the above embodiments, according to the present invention, the carrying-in attitude and height of the workpiece relative to the transfer press can be arbitrarily adjusted. Therefore, even if the mold of the transfer press is changed, for example, this can be conveniently handled without changing the specifications of the workpiece conveyance means.

[Brief explanation of drawings]

Fig. 1 is a conceptual diagram showing a combination press line to which the work posture adjustment device according to the present invention is applied, Fig. 2 is a perspective view showing the structure and arrangement of the lifter, and Fig. 3 is a diagram showing the control of the servo motor of the lifter. A block diagram showing an example of the control system, FIGS. 4 and 5 are conceptual diagrams showing states in which the workpiece is pitched and rolled, respectively, and FIG.
Fig. 7 and Fig. 7 are conceptual diagrams showing other embodiments of the present invention, Fig. 8 is a conceptual diagram showing an example of a transfer bar of a transfer press, and Fig. 9 and Fig. 10 are conceptual diagrams showing an example of a transfer bar of a transfer press. It is a conceptual diagram which illustrated the state which has a posture. lO...Draw press, 11...Transfer press, 15-18.21-23...Lifter, 154-184
...servo motor, 19...controller. Figure 3 Figure 4 Figure 5 Figure 1 Figure 2 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10

Claims (1)

[Claims] At least three lifters are arranged at the workpiece loading position of the transfer press to support the lower surface of the workpiece at multiple points, and each lifter is equipped with a lifting actuator, and the top of each of the lifters is set at a target height. 1. A workpiece posture adjustment device comprising: control means for individually controlling the actuators of these lifters so that the lifters are positioned in the same position.