Wire Electrode Inclination for EDM Approach Damage Reduction
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Solution Overview
Problem
Wire electrical discharge machining often results in machining damage during cutting and escape processes due to excessive discharge and double machining on the approach portion, which is not effectively addressed by existing techniques.
Innovation Solution
A wire electrical discharge machine and method that inclines the wire electrode within a plane parallel to the machining surface during approach and escape sections, with controlled inclination angles set by a program to prevent machining damage by avoiding double machining.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the wire electrode approaches the workpiece for cutting machining, then the machining process can be performed, but machining damage as streaks is caused in the approach portion due to discharge starting before the final arrival position
Solution Approach 1:
The wire electrode is inclined in advance during the approach section before reaching the final cutting position. This preliminary inclination prevents discharge from occurring in the approach portion, eliminating machining damage streaks while maintaining the ability to perform cutting machining at the correct position
Solution Approach 2:
The wire electrode's inclination angle is dynamically adjusted during different machining sections. During the approach section, the electrode is inclined to prevent discharge; during the cutting section, the electrode returns to its normal position for proper machining. This dynamic adjustment resolves the contradiction between performing machining and avoiding approach portion damage
2Productivity
If the wire electrode performs approach and escape machining, then the cutting process can be completed, but the approach portion is machined twice causing conspicuous machining damage
Solution Approach 1:
The wire electrode is inclined in advance during both the approach section and the section before escape. This preliminary inclination prevents discharge during approach and escape operations, eliminating double machining damage on the approach portion while allowing the cutting process to be completed normally
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively reduces machining damage by avoiding double machining on the approach and escape portions, improving the accuracy and reducing the conspicuousness of machining damage as the number of cutting processes increases.
Implementation Method 1
machines the workpiece by discharge generated between the wire electrode and the workpiece
Data Source
AI summary
A wire electrical discharge machine includes an approach control unit. The approach control unit relatively moves a wire electrode with respect to a workpiece while inclining the wire electrode within a plane parallel to the machining surface to which the wire electrode approaches, in an approach section where the wire electrode performs cutting machining on the machining surface of the workpiece.