JPS5881599A - Monitoring device for pressing condition - Google Patents

Abstract

PURPOSE:To prevent failure of press dies and production of defectively pressed products by monitoring a material to be pressed and the operation of a press machine during the operation of the press machine and stopping the press operation immediately when abnormality is detected. CONSTITUTION:The relative positions of a punch side 2 of dies and a die side 3 of dies during pressing with a press machine are detected with proximity sensors, and after the detection signal 6 thereof is amplified 7, the signal is subjected to A/D conversion with an A/D conveter 8. The input 9 from a relative position detector for the punch side 2 of the dies and a body 1 of the press machine is inputted to a counter control part 10, and the A/D converter output is inputted to a counter 11. The standard state is stored in a storage counter 12. The count quantity of 11 and the standard count quantity of 12 are compared in a comparator 13, and the result thereof is displayed on a display device 14. When abnormality by the display is discovered, the press machine is stopped, whereby the failure of the dies and the production of defectively pressed products are prevented.

Description

[Detailed description of the invention] The present invention relates to a press condition monitoring device IT.

The purpose of the present invention is to press +kA 411 operation 11.5''
The goal is to constantly monitor whether the materials and press machines are operating properly.

Another object of the present invention is to detect an abnormality during operation of a press machine, display the abnormality, or stop the press machine, thereby minimizing damage caused by mold breakage or defective products.

Still another object of the present invention is to display the difference between the optimal processing state and the -film processing state when the press machine is in operation, so that some kind of action can be taken before an abnormality or defect occurs. be.

In conventional press machines, the detection of abnormalities and the clues to the abnormal state were made by inspecting the finished product and making judgments based on the sounds made during pressing. In this conventional method, an abnormality is detected only after it occurs, and it is impossible to take action before the abnormality occurs. If an abnormality occurs, the abnormality will cause abnormality, resulting in expensive mold damage and wasted material, so press machines must be constantly monitored by press machines such as press plates in molds where abnormalities are likely to occur. There are various reasons why abnormalities occur, but broadly speaking, they can be broadly classified as: The cutting edge of the mold becomes dull, which causes excessive stress on the mold, causing mold breakage H1; Materials are fed and pressed, causing mold damage.

The present invention eliminates such drawbacks and is an apparatus that constantly monitors the press state, detects the occurrence of an abnormality or a sign of an abnormality, and automatically performs preset processing.

To explain the configuration of the press condition monitoring device according to the present invention with reference to FIG. 1, 1 is the main body of the press, 2 is the punch side of the mold, 6 is the die side of the mold, and 2 is the predetermined operating range. By putting the material in 5 between 2 and 3, which moves up and down as shown in 4, the desired press is achieved. A non-contact proximity sensor is installed at an arbitrary position so that the mutual positions of 2 and 3 can be detected. Further, a position 1 detection device is installed at an arbitrary position between 2 and 1 so that a predetermined timing can be obtained. Next, as shown in FIG. 2, the signal processing configuration after the proximity sensor output and the position detection timing signal explained in FIG. 1 is shown. 6 is the proximity sensor, 7 is amplified, and 8 is A/D transformation.

9 is a digit fM detection input, and 1o is a counter control part for controlling the counter 11 for an arbitrary time with the output A/D converted by 8. The standard state memory from the counter 11 is set to 12, the 110 count amount and the standard count amount of 12 are compared at 13, and the result is displayed at 14. The result is also sent to the judgment unit 150, where a necessary judgment is made based on the value inputted in advance as a standard, and sent from 16 as a control output to the press machine when necessary. To provide a supplementary explanation of FIG. 2 to FIG. 3, 17 is the output obtained from the proximity sensor, 18 is the direction in which the punch approaches the die, and 19 is the time axis. The shaded area of 20 is A
/ This is the necessary part for D conversion, and this total area is integrated. Generally, when the mold becomes dull, the number of parts 21 increases, and the number 22 also becomes noticeable. Therefore, it is possible to understand the state by storing this integral value and comparing and determining it.

As is clear from the above examples, according to the EIll of the present application, conventional measures could only be taken after the occurrence of an abnormality.
Immediate action can be taken at the time of an abnormality or a change in condition, and damage caused by the abnormality can be prevented or minimized, and it can produce a great effect on press dies and press machines, which are becoming increasingly expensive and complex. It is something.

[Brief explanation of the drawing]

FIG. 1 shows the configuration of a press condition monitoring device according to the present invention. 1...Press machine body 2...Punch side of the mold 3...Die side of the mold 4...5 showing the upper and lower punch sides
・Between punch and die Figure 2 shows the signal processing configuration for proximity sensor output and position detection timing signal collection. 6...Proximity sensor human cuff...Amplifier 8...A/D converter 9...Position detection timing input 10...Counter control section 11. ... Counter 12 ... Standard state memory counter 13 ... Comparator 14 ... Display 15 ... Judgment device 16 ... Press machine control section output signal Figure 3 shows the proximity sensor output waveform 17... Overall diagram of the proximity sensor output waveform 18... Direction in which the punch approaches the die side 19... Time axis 20... A/D conversion part 21... Output waveform part during pressing 22 showing the bottom dead center waveform at the end of pressing Applicant: Suwa Seikosha Co., Ltd.

Claims (5)

[Claims] (1) Press 4i A press condition monitoring device comprising a press, a proximity sensor, and an electronic circuit. (2) The press condition monitoring device according to claim 1, wherein the position of the punch side and die side of the press machine is detected by a proximity sensor. (3) The press condition monitoring device according to claim 1, characterized in that the movement timing of the press machine can be detected at a certain specific position. (4) From the signal that finally detects the distance between the punch side and the die side during pressing, the signal is sent to A at any time according to the timing.
2. The press condition monitoring device according to claim 1, further comprising an electronic circuit that can perform D/D conversion and storage. (5) The press condition monitoring device according to claim 4, wherein the stored information and the detected information are compared, and the difference and pass/fail can be determined based on a standard value inputted in advance.