Method for efficient discharge milling with hollow long electrode

Abstract

A discharge mill technology using simple hollow long electrode is based on the numeral control technique and features use of simple hollow long electrode plus guider. The said electrode features simple cross-section, hollow structure for delivering liquid and high length-radium ratio (more than 3:1). Its advantages are high productivity to Ti-alloy, refrectory alloy and stainless steel.

Description

technical field [0001] The invention relates to a high-efficiency electric discharge milling forming method, in particular to a high-efficiency electric discharge processing method based on numerical control technology and using a simple hollow long electrode to perform high-efficiency milling through electric discharge (such as electric arc and electric spark). Background technique [0002] In aerospace, military industry, gas turbine, mold and other fields, there are many parts of special materials that need to be processed, such as titanium alloy, high temperature heat-resistant alloy, stainless steel, etc. These materials have strong viscosity, poor thermal conductivity, and poor machinability. The processing efficiency is extremely low, and the tool cost is also very high, which seriously restricts the technological progress and development of these industries. In recent years, with the rapid development of electrical machining technology and technological level, millin...

AI Technical Summary

Problems solved by technology

For high-efficiency milling electric machining, due to the large electrode loss, the resulting problem is that the dimensional accuracy and profiling accuracy of the processed workpiece are greatly reduced, especially for multi-cavity processing, and the dimensional accuracy of each cavity cannot be guaranteed.

However, the two methods have their own advantages and disadvantages. If the first method is adopted, the accuracy problem can be solved obviously, but the time spent on detection will double the processing efficiency.

If the second method is used, although it has no effect on the processing efficiency, due to the uncertainty of the process conditions, the deviation between the compensation amount of the electrode and the actual loss will become larger and larger as time goes by, which will eventually make the processing accuracy error too large. Accuracy requirements cannot be guaranteed

In short, the above two methods are difficult to achieve the best of both worlds in practice.