Electrochemical machining high frequency pulse power source based on SOPC technology

Abstract

The invention relates to an electrochemical machining high frequency pulse power source based on an SOPC technology. The electrochemical machining high frequency pulse power source comprises an AC input end, a primary rectifying filter circuit, a full-bridge inverter circuit, a high-frequency variable voltage circuit, a secondary rectifying filter circuit, a chopper filter circuit and a pulse output end, and further comprises an energy release device, a load current detection circuit and a control system. The control system is connected with the full-bridge inverter circuit, the chopper filter circuit, the energy release device and the load current detection circuit. When the rise rate of currents detected by the load current detection circuit is continuously larger than a set value by four sampling periods, the control system controls the full-bridge inverter circuit and the chopper circuit to be turned off, and pulse signals are output to trigger the energy release device. According to the electrochemical machining high frequency pulse power source based on the SOPC technology, the energy release device is arranged, when an abnormal phenomenon happens to processing, the control system can timely trigger the energy release device to protect a processing electrode, the stability of the power source is improved, and full-digital control of the power source is achieved.

Description

Technical field [0001] The invention relates to a pulse power supply, in particular to a high-frequency pulse power supply for electrochemical machining based on SOPC technology. Background technique [0002] Electrochemical Machining (ECM) is a method of dissolving and removing materials based on anode metal in the form of "ions". The anode of the workpiece and the cathode of the tool are connected to a DC or pulsed power supply (generally 10V~25V). The electrochemical machining process has the advantages of high processing efficiency, no loss of tools, no heat-affected layer on the surface of the workpiece after processing, smooth structure surface, no internal stress, no cracks, and processing is not limited by the hardness of the material. It has been used in small, micro, thin, It has a significant advantage in the field of overall structure and special parts processing. [0003] Pulse Electrochemicial Machining (PECM) can be divided into low frequency (tens of Hz) or hig...

AI Technical Summary

Problems solved by technology

The SG3525 mainly realizes the voltage or current control of the power supply by adjusting the pulse width of the inverter, so it is not very suitable for the electrolytic power supply that is rectified, filtered and then chopped after inverter.

[0013] DC electrolysis power supply and inverter rectification electrolysis power supply have the disadvantage of low machining accuracy, so it is difficult to meet the requirements of high-precision electrolytic machining, and cannot give full play to the advantages of electrolytic machining technology

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