JPS63196326A - Automatic electric discharge device - Google Patents

Abstract

PURPOSE:To make it possible to perform unmanned operation of a ram type electric discharge machining device by using a camera or an image sensor so that the condition of electric discharge machining is successively taken out as images which are compared with a standard image so as to check the condition of machining. CONSTITUTION:The condition of electric discharge is successively caught by a camera 1 and is delivered to an image processing device 3, thereby it is displayed on a CRT screen 4. A monitor device is composed of the image processing device 3, a comparing and judging circuit 5 and a memory circuit 6. An image in a normal machining condition is stored in the memory circuit 6, and is delivered to the comparing and judging circuit 6 in which the image is compared with a present image caught by the camera 1 to detect and deliver an abnormal condition. It is noted that the image processing device 3 delivers data in the form of digital signals to the comparing and judging circuit 5 in accordance with the scanning of the camera 1, moment by moment, and simultaneously, an intensity delivered from the memory circuit 6 in which a standard image is stored, is compared with the digital data in the comparing and judging circuit 5. If both compared values are different from each other, such control that an alarm is issued is carried out.

Description

[Detailed description of the invention]

1 scrap is milky Jυ! This invention is free! 770 This is an R4 machining device that constantly checks the machining state using a camera and image sensor, which are devices for monitoring the machining state, and automatically calculates and controls the machine while comparing it with the internal ROM or RAM. 4J and falsetto R-11! DM (ram type electric discharge machining device) and W-EDM (
Many devices and technical ideas related to unmanned operation have been proposed for wire-cut electric discharge machining equipment. For example, NC device

[Numerical control device] and automatic loading/unloading device for snow making or workpieces with electrode exchange, and 7M8 etc. in combination with multiple electrical discharge machining devices. 1 +, RO Selected However, there are still many concerns about the equipment's busyness in the case of conventional automation. For example, there is a leakage of separate processing fluid. In particular, if an abnormality in the R-EDM state or the detection of the above-mentioned phenomena, such as white smoke generated during arcing due to discharge in oil, can be confirmed, subsequent fires can be completely prevented. In addition, during wire-cut electric discharge machining, splashing of other machining fluids is susceptible to water and can cause malfunctions of the power supply and No. 1 equipment, and leakage of machining fluids can rust surrounding machines or make the machining stop busy. . Conventionally, these monitoring methods include not only the state between poles but also sound and light. Methods have been used to determine the state using temperature or the like as a detection signal, but there are some points in which detection is impossible even with these methods. -m-ru 9! ! In consideration of these points, the present invention includes a camera or an image sensor (C
0D) for the normal image stored in the memory circuit of the computer or NO device, the camera, 0OI
) compares and judges the abnormal images captured, and based on this, outputs a control signal to cut off the power, and issues an alarm.
The aim is to solve these problems and provide an automatic electrical discharge machining machine that enables unmanned continuous operation by providing a monitoring device that performs appropriate judgment processing to control one or both of the processes. As described above, in the present invention, the machining state is always captured by a camera or 00D in electric discharge machining such as R-EDM, WR:DM, etc., and the current machining situation is always compared and examined with the normal machining situation. However, it is important to accurately check the current machining status, the quality of the machining method, the quality of machining condition settings, abnormal arc discharge status of VO machining, changes in liquid level, quality of leakage injection, and jet flow. It is possible to completely capture both the quality and failure and perform stable processing.The present invention will be explained with reference to an embodiment of the R-KDM shown in the figure.In the figure, 1 is a camera or image sensor, and 2t!R-EDM
The main body, 5 is an image processing device, and 4 is a CRT image. 5 is a comparison/judgment circuit, and 6 is a memory circuit. The electrical discharge machining state is sequentially captured by camera 1 and sent to image processing device 3.
guided by and projected onto 0RT4. The monitoring device is, for example, an image processing device 5. It consists of a comparison judgment circuit 5 and a memory 6, and the memory circuit 6 stores an image in the discharge machining state such as when a normal discharge starts, during machining, or when machining is stopped, and the image information is compared. The image is input into a judgment circuit 5, and compared with the current image captured by the camera 1Vc, and if there is an abnormality, the abnormal point is detected and outputted. The image processing device 5 follows the scanning of the TV camera 1 and outputs momentary information as a digital signal to the comparison/judgment circuit 5. At the same time, a standard image is stored and output from the memory circuit 6 to the comparison/judgment circuit 5. The intensity is compared by this comparison/judgment circuit 5, and there is a difference between the two comparison values. When a problem occurs, it outputs a judgment and performs control such as cutting off the power and issuing a warning. Although the R-KDM has been described above, the same applies to the wire-cut electrical discharge machining apparatus. However, wire-cut electrical discharge machining equipment does not use flammable machining fluids such as kerosene, so there is no need to worry about fire extinguishing. In addition to changes in the state of the jet flow, the VC may become clogged with dirt or overflow, and in such cases a stop signal and alarm are issued to stop the machine and perform repairs. 1 list ♀ Nest! As described above, in the present invention, a camera or an image sensor is used to sequentially capture electrical discharge machining conditions such as machining machine (machine cutter), completion of 1MJ machining during 2FO machining, etc., and convert them into images. At that time, you can check the machining status by comparing it with the standard image at that time and using a computer, so you can perform stable electrical discharge machining.

[Brief explanation of the drawing]

The figure is a schematic diagram of one embodiment of the present invention. 1 is a camera, 2 is a REDM body, 5 is an image processing device, 4
017 image, 5 a comparison judgment circuit, and 6 a memory circuit.

Claims (1)

[Claims] In electrical discharge machining equipment such as R-EDM (ram-type electrical discharge machining equipment) and W-EDM (wire-cut electrical discharge machining equipment), the machining status is checked using a camera or image sensor and its output and normal status. An automatic electrical discharge machining device equipped with a monitoring device that constantly compares the stored contents of a computer or an NC device and outputs a control signal.