Wire EDM Die Guide Compensation for Accurate Electrode Angle
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing methods for improving machining accuracy in wire electrical discharge machines are ineffective when the position of the wire electrode, as defined in the machine coordinate system, differs from its actual position, leading to incorrect angles and reduced accuracy even after compensating for axis movements.
Innovation Solution
A control device and method that includes a storage unit for holding position information, a movement control unit to adjust die guides, a dimension acquisition unit for measured dimensions, a computation unit to calculate actual holding positions, and a compensation unit to rewrite stored information based on actual positions, ensuring the wire electrode is inclined at the specified angle during machining.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the wire electrode position is shifted from the machine coordinate system, then the wire electrode inclines at an incorrect angle, but machining accuracy is still poor even after axis movement compensation
Solution Approach 1:
The system performs preliminary measurement of the wire electrode's actual holding positions at both die guides before machining. These measured positions are stored and used to calculate compensation values in advance, so that when machining begins, the correct compensation is already applied to ensure the wire electrode inclines at the specified angle, preventing machining accuracy issues before they occur
Solution Approach 2:
The system measures the actual holding positions of the wire electrode at the first and second die guides, compares these measurements with the machine coordinate system positions, and uses this feedback to calculate and apply compensation values. This closed-loop feedback mechanism ensures that any deviation in wire electrode position is detected and corrected to maintain the specified inclination angle
2Manufacturing precision
If compensation values are calculated based on test workpiece dimensions, then axis movements are compensated, but the wire electrode may still be inclined at the wrong angle due to position shifts
Solution Approach 1:
The compensation system is segmented into distinct functional components: a measurement unit that measures actual holding positions, a storage unit that stores these positions, a calculation unit that computes compensation values, and a control unit that applies compensation. This segmentation allows each component to perform its specific function efficiently, managing the overall system complexity while achieving accurate wire electrode angle control
Data Source
AI summary
A wire electrical discharge machine acquires measured dimensions of a test workpiece that has been machined with a wire electrode inclined at a given angle with respect to a running direction in which the wire electrode runs; and calculates, based on the measured dimensions, first actual information indicating an actual holding position at which the wire electrode is actually held at a first die guide for guiding the wire electrode to a workpiece, and second actual information indicating an actual holding position at which the wire electrode is actually held at a second die guide for guiding the wire electrode sent from the workpiece, and, when necessary, the wire electrical discharge machine rewrites first information and second information stored in a storage unit to the calculated first actual information and second actual information.