JPH0332413B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for abutting a plate-shaped workpiece to be processed by a press machine in order to position the workpiece.

Conventionally, in order to position a plate-shaped workpiece processed by a press machine, an abutment member against which the workpiece abuts is moved and positioned in the front-rear direction or left-right direction by an operating mechanism using a servo motor and a ball screw. It is common that Therefore, in the past, in order to improve the positioning accuracy of the abutment member, a high-precision ball screw was required and was expensive, and a mechanism was required to stop the abutment member at the stop position after positioning. This is necessary and complicates the configuration, and furthermore, since rotational motion is converted into linear movement, the movement speed is low.

The present invention was invented in view of the above-mentioned problem, and is intended to use a linear pulse motor to move and position an abutting member against which a workpiece is abutted.

Referring to FIG. 1, a press machine 1 for processing a plate-shaped work W includes an upper die 3 and a lower die 5. As shown in FIG. A box-shaped first guide member 7 extending in the front-rear direction from a position close to the upper air press machine 1 or a position close to the press machine 1 is disposed close to the processing position by the upper die 3 and the lower die 5. a second guide member 9 extending in the left-right direction;
is arranged.

In order to position the plate-shaped workpiece W processed by the press machine 1 in the front-rear direction and the left-right direction, the guide members 7 and 9 are each provided with abutment members 11 for abutting the workpiece W thereon. It is attached so that it can be moved freely. That is, as is clear from FIG. 2, the stator 15 of the linear pulse motor 13 is provided inside the guide member 9 in the longitudinal direction of the guide member 9, and the stator 15 is provided with the stator 15 of the linear pulse motor 13. The movers 17 are movably arranged in correspondence with each other. A bracket 19 facing the longitudinal slit 9S provided in the guide member 9 is attached to the upper air mover 17.
The abutment member 11 is attached to. Therefore, the abutment member 11 is linearly reciprocated and positioned by the drive of the linear pulse motor 13.

In order to accurately position the abutment member 11, the movable element 17 is equipped with a position detection device 21 that detects the moving position or distance of the abutment member 11 from a reference position. That is, a linear scale 23 extending parallel to the stator 15 of the linear pulse motor 13 is disposed inside the guide member 9, and a linear scale 23 is disposed in the movable element 17.
A sensor 25 corresponding to the above is attached. The upper air linear scale 23 is made of a suitable scale such as an inductosin or a magne scale, and the sensor 25 detects the corresponding position of the linear scale electromagnetically or optically.

Therefore, in order to move the abutment member 11 from the reference position to an appropriate position, the input command value input to the control device of the linear pulse motor 13 and the position detection device 2 are
By comparing the detection values of 1 and controlling the linear pulse motor 13 in a feedback manner, the abutting member 1
1 can be accurately positioned.

In the above explanation, the positioning mechanism of the abutment member 11 on one guide member 9 side has been explained, but since the positioning mechanism of the abutment member 11 on the other guide member 7 side has a similar configuration, a detailed explanation thereof will be given below. Omitted.

As can be understood from the above description of the embodiments, in the present invention, the abutting member for abutting and positioning the plate-shaped workpiece processed by the press machine is moved by a linear pulse motor. Because it is positioned, the abutment member can be moved and positioned faster than when using a ball screw, and it can be made smaller and has a simpler mechanism, making it cheaper to manufacture. be. In particular, since the moving position of the abutment member is determined by a linear pulse motor, the impact when a workpiece comes into contact with the abutment member is caused by the holding force of the linear pulse motor trying to hold the mover in a fixed position. It will not be absorbed by the force and adversely affect the stator. Therefore, even if the workpiece is brought into contact with the abutment member many times, the positioning accuracy of the abutment member will not be degraded.

Note that the present invention is not limited to the above-described embodiments, but can be implemented in other embodiments by making appropriate changes. For example, the position detection device may be configured to magnetically or optically detect the pole teeth of a stator in a linear pulse motor. In addition, the press machine is not limited to a punch press, and various other press machines such as bending presses can also be used.

[Brief explanation of drawings]

Fig. 1 is a schematic perspective view of a workpiece abutment device in a press machine, and Fig. 2 is a -
FIG. 3 is an enlarged cross-sectional view taken along the line. (Explanation of symbols representing main parts of drawings), 1
...Press machine, 7, 9...Guide member, 11...
...Abutting member, 13...Linear pulse motor, 15
...Stator, 17... Movable element, 21... Position detection device.

Claims (1)

[Scope of Claims] 1. A guide member is provided that extends from a position close to the processing position in the press machine in an appropriate direction of front and back or left and right, and a stator of a linear pulse motor is attached to this guide member to fix the upper air. 1. A workpiece abutment device for a press machine, characterized in that a workpiece abutment member is attached to a movable member that is movable along the movable member, and a position detection device is provided. 2. Claim 1, characterized in that the guide members extend in two directions, front and back and left and right from the processing position in the press machine, and each guide member is provided with a movable abutment member. A workpiece abutment device in a press machine described in 2.