JP3366627B2 - Press equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a press apparatus for judging the quality of processing at the time of processing. 2. Description of the Related Art There is a conventional press device that determines that the positioning of a work has been completed and starts processing when the work comes into contact with a predetermined position of a processing die. However, immediately after the start of machining, the end face of the work may be separated from the machining die, which may deteriorate machining accuracy. However, there is no means for objectively grasping whether or not the workpiece has been separated at the time of processing in the conventional apparatus, and at present, it is left to the judgment of the operator. Therefore, if the operator does not notice, there is a possibility that a work with low processing accuracy may be mixed into a work with high processing accuracy. SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-mentioned circumstances, and an object thereof is to provide a press apparatus which can objectively find a work with low machining accuracy. is there. [0005] According to the present invention, a processing die is provided with an accommodating portion for inserting a tip portion of a work, and a contact portion for contacting an end surface of the work, and is inserted into the accommodating portion. A press device that has a detection pin that is pushed in by the end surface of the work, and that slides down after the sequencer unit receives a short-circuit signal in which the detection pin and the contact portion are short-circuited through the end surface of the work inserted into the processing mold In the above, a bottom dead center detection sensor for detecting that the slide has reached the bottom dead center is provided, and when the bottom dead center signal is output from the bottom dead center detection sensor, whether or not the short-circuit signal is output The sequencer unit determines whether or not the short circuit signal has been output, and the output device outputs that the end face of the workpiece is processed away from the contact portion. In order to know the short-circuit state, the work, the contact portion, and the detection pin use a conductive material. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, in a press apparatus of the present invention, a slide 4 on which a cylinder 3 is mounted is provided on a stage 2 on which a processing die 1 is installed so as to be able to move up and down. When the workpiece W is inserted into the mold 1 and positioning is completed, an operation signal is sent from the sequencer unit 5 to the hydraulic drive control unit 6.
, And the hydraulic drive control unit 6 operates the cylinder 3 to sequentially lower and raise the slide 4, and the processing tool 7 fixed to the slide 4 performs processing such as punching on the work W. When the position of the workpiece W is maintained at the time of reaching the bottom dead center of the slide 4 and when the workpiece W is displaced from the positioned position, the normal processing signal and the abnormal processing signal are output from the sequencer unit 5 to the output device 8. And the output device 8 expresses normality and abnormality. [0008] The processing die 1 is provided with a contact portion 10 for pressing the end face of the work W on the back side of the accommodating portion 9 into which the tip of the work W is inserted. More specifically, the processing die 1 is a block, and the depth of the mounting portion 11 to be mounted on the stage 2 is raised in a step-like manner, and that portion is used as a contact portion 10. The positioning part 12 to be fitted is projected from just above the contact part 10 toward the front, and the outer peripheral space of the positioning part 12 is
There is. In addition, the processing die 1 projects the tip of the detection pin 14 from the bottom 13 into the housing 9, and projects the rear of the detection pin 14 behind the bottom 13, and a spring (not shown) housed in the bottom. ) Detection pin 14 using the elastic force
Is pressed against the accommodation portion side, and the detection pin 14 is provided so as to be able to be pushed by the work W against the elastic force. The work W is positioned by inserting the work W deeply into the positioning portion 12 and pushing the detection pin 14 so that the end face of the work W contacts the contact portion 10, that is, the detection pin 14 and the contact portion 10 Then, the state is completed in which a short circuit is caused with the end face interposed. Processing is started when the sequencer unit 5 grasps the short-circuit state. In the open state where the workpiece W is not in contact with the contact portion 10 even when the detection pin 14 is pushed in, processing is not started because positioning is not performed. Therefore, the insulation between the detection pin 14 and the contact portion 10 is ensured except when the work W is inserted into the processing die 1 so that the short-circuit state can be surely known. In the part where the workpiece W comes into contact with the mold 1,
Insulation is ensured at the contact portion 10 and other portions (the positioning portion 12 and the mounting portion 11), and the detection pin 14 and the contact portion 10 separately conduct with the sequencer unit 5. As an example, the portion of the detection pin 14 housed in the bottom portion 13 is insulated from the processing die 1 by sequentially surrounding the outside with a spring and an insulating pipe (not shown), and the rear portion of the detection pin 14 is provided. And the sequencer unit 5 are connected. Then, when the sequencer unit 5 receives the short-circuit signal from the contact portion 10 side, it determines that the positioning of the work W has been completed and outputs a processing start signal to the hydraulic drive control unit 6. The hydraulic drive control unit 6 operates the cylinder 3 by controlling the drive of the pump, the flowing direction of the oil, and the like, thereby lowering and raising the slide 4. In order to know that the slide 4 has reached the bottom dead center, a bottom dead center detection sensor 15 is fixed to the frame F on the stage 2 side. 15, the light projected from the bottom dead center detection sensor 15 is reflected by a reflector, and the reflected light is received by the bottom dead center detection sensor 15 to measure the distance between the two. Know that the dead center has been reached. When the position of the work W is maintained when the slide 4 reaches the bottom dead center, the processing accuracy is good, and when the position of the work W is shifted, the processing accuracy is poor. Therefore, it is determined whether or not the sequencer unit 5 receives the bottom dead center reaching signal and the short-circuit signal at the same time. If the short-circuit signal cannot be detected, the workpiece is processed in an abnormal state in which the end surface of the work is separated from the contact portion. Is output by the output device 8. On the other hand, when a short circuit signal is detected,
As processing is performed in a normal state, a message to that effect is output or nothing is output. The output device 8 includes a lamp, a buzzer, a touch panel display, and the like, and expresses different outputs in a normal state and an abnormal state. The touch panel display is provided with a current state column and an operation column at the time of processing of the press device itself so that an operator can easily grasp the situation. The above-described press apparatus has a positioning unit 1 as shown in FIG. 2 in order to prevent a short-circuit signal from being output even though the workpiece W is not inserted into the processing die 1.
A non-contact type area sensor 17 is provided on the left and right of 2 to detect that the workpiece W is inserted into the processing die 1. The area sensor 17 includes a light emitter and a light receiver, and uses a space above or below the positioning part 12 as a light passage area. Then, a large number of optical axes are projected with an interval in the front-rear direction, and the insertion state of the work W is grasped by whether or not each optical axis can be received. Then, only when the sequencer unit 5 receives a signal indicating that the innermost optical axis cannot be received from the optical receiver and the short-circuit signal is also output, the drive of the slide 4 is started, thereby causing a malfunction. Can be blocked. The present invention is not limited to the above embodiment. For example, the press device may be one in which processing dies are arranged vertically and horizontally and processing performed by each processing die is different. In addition, the work is not limited to a hollow material such as an aluminum sash, and may have a shape without a cavity. In this case, the positioning portion 12 may be a rail-shaped member that guides the side of the work. Further, the bottom dead center detection sensor 15 and the reflection plate 16 may be separately fixed to the slide 4 side and the stage 2 side. According to the press apparatus of the present invention, whether or not the work is in the same state as at the start of machining, not only at the start of machining but also at the time of the bottom dead center of the slide, is checked by the output of the output device. Can know that the work accuracy of the work is poor.

[Brief description of the drawings] FIG. 1 is a longitudinal sectional view showing a press device of the present invention. FIG. 2 is a schematic plan view showing a press device of the present invention. [Explanation of symbols] 1 Processing die 4 slides 5 PLC unit W Work 8 Output device 9 accommodation 10 Contact part 14 Detection pin 15 Bottom dead center detection sensor

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B21D 43/00 B30B 15/28

Claims (1)

(57) [Claim 1] The working die (1) is in contact with the receiving portion (9) into which the tip of the work (W) is inserted and the end face of the work (W). A receiving pin (14) that is pushed by the end face of the inserted work (W) in the receiving section (9), and the end face of the work (W) inserted into the processing die (1). Between the detection pin (14) and the contact portion (1)
In the press device which descends the slide (4) after the sequencer unit (5) receives the short-circuit signal in the state where 0) is short-circuited, the bottom dead center detection detects that the slide (4) has reached the bottom dead center. A sensor (15) is provided, and a bottom dead center detection sensor (1
At the time when the bottom dead center signal is output from 5), the sequencer unit (5) determines whether or not the short circuit signal is output. If the short circuit signal is not output, the work (W) The output device (8) outputs that the end surface of (1) is processed away from the contact portion (10).