Wire EDM Probe Offset Correction for Tilted Workpieces
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Solution Overview
Problem
Conventional wire electrical discharge machines struggle to maintain processing accuracy and perform automatic detection of the workpiece position when a workpiece is set with an inclination error relative to the mount surface, especially when using the probe measurement function in conjunction with the horizontal correction function.
Innovation Solution
A wire electrical discharge machine equipped with a mounting table, first and second guide portions, a probe, tilt information acquisition unit, and offset correction unit, which adjusts the relative position between the guide portions to align the wire electrode with the workpiece tilt, allowing for offset correction based on tilt information to maintain accuracy and enable automatic detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the probe measurement function is used together with the horizontal correction function, then automatic detection of workpiece position is enabled, but processing accuracy deteriorates when the wire electrode is tilted
Solution Approach 1:
The patent applies preliminary action by measuring and storing the offset between the probe and wire electrode before tilting the wire electrode. This pre-measured offset is then used to calculate corrected positions after tilting, enabling accurate workpiece detection even when the wire electrode is inclined relative to the workpiece
Solution Approach 2:
The patent replaces direct mechanical measurement with a computational approach. Instead of physically measuring positions after tilting, the system uses mathematical calculations based on pre-stored offset values and tilt angles to determine corrected probe positions, substituting mechanical measurement with computational geometry
2Manufacturing precision
If the relative position between guide portions is adjusted to align with workpiece tilt, then processing accuracy is maintained, but device complexity increases
Solution Approach 1:
The patent applies universality by making the probe movable integrally with the guide portions, allowing the probe to perform multiple functions: detecting workpiece positions and simultaneously tracking the tilt adjustments of the wire electrode. This integrated design eliminates the need for separate measurement systems for tilted configurations
Solution Approach 2:
The patent implements feedback by using the probe to detect workpiece positions and comparing these detections with calculated positions based on stored offsets and measured tilt angles. This feedback loop enables automatic correction of position data to account for wire electrode tilting, maintaining accuracy without manual intervention
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 maintains processing accuracy and enables automatic detection of the workpiece position even with inclination errors, ensuring precise machining by correcting offsets based on tilt information and adjusting the relative positions of the guide portions.
Implementation Method 1
performing electrical discharge machining on a workpiece by generating electric discharge between a wire electrode and the workpiece
Implementation Method 2
a probe configured to be movable integrally with the first guide portion and detect abutment against the workpiece placed on the mounting table
Data Source
Figure 1
Figure 2A~2B
Figure 3A~3B
AI summary
A wire electrical discharge machine (10) includes: a mounting table (14) having a placement plane (30) on which a workpiece (W) can be placed; a first guide portion (60) and a second guide portion (66) for stretching a wire electrode (12) therebetween. The first guide portion is integrally equipped with a probe (64). The relative position in the placement plane (30) between the probe (64) detecting its abutment with the workpiece (W) and the first guide portion (60) before moving the relative position between the first guide portion (60) and the second guide portion (66) is stored as an offset. This offset is corrected based on the tilt information indicating the tilt state of the workpiece (W) relative to the placement plane (30). Thus, it is possible to obtain the corrected offset in accordance with the tilt state of the workpiece (W) after changing the relative position between the first guide portion (60) and the second guide portion (66).