Wire EDM Guide Position Correction for Accurate Taper Machining
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Solution Overview
Problem
Existing wire electric discharge machines face challenges in accurately determining the position information of the supporting points of the upper and lower guides, which significantly affects the shape of the workpiece during tapering machining processes.
Innovation Solution
A correction device and method that includes a storage unit, inclination control unit, measurement unit, and information correction unit to accurately determine and correct the position information of the supporting points of the upper and lower guides by measuring the relative movement of the guides and wire electrode with respect to a measurement site, using a support platform and servomotors to control the guides' positions and movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the wire electrode is caused to be inclined by making the relative positions between upper guide and lower guide different, then the tapering machining process can be performed, but the position information of the supporting points becomes inaccurate
Solution Approach 1:
The patent applies preliminary action by measuring and correcting the position information of the supporting points before performing the tapering machining process. The correction device calculates the actual positions of the upper and lower guide supporting points based on the inclination angle and distance between guides, and stores this corrected position information for use during machining. This preliminary correction ensures that the position information is accurate even when the guides are positioned at different heights to create the inclined wire electrode for tapering operations.
2Measurement precision
If the upper guide and lower guide are positioned at different heights to incline the wire electrode, then relative movement measurement becomes necessary, but the complexity of the measurement system increases
Solution Approach 1:
The patent uses a measurement object as an intermediary element to facilitate the measurement of relative movement between the upper and lower guides. The measurement object includes a measurement site positioned at a known location, and the system measures the relative movement between this measurement site and the guides. This intermediary approach simplifies the measurement system compared to directly measuring the complex relative movements of the inclined wire electrode and both guides simultaneously.
Data Source
AI summary
Provided are a wire electric discharge machine, a correction device, and a correction method which accurately correct position information indicating the position of a supporting point of each of an upper guide and a lower guide. The correction device includes: a storage unit that stores the position information; an inclination control unit that causes a wire electrode to incline at a predetermined angle; a measurement unit that measures a relative movement amount from a state in which the lower guide and a measurement site are separated by a predetermined distance in a relative movement direction to a state in which the wire electrode inclined at the predetermined angle reaches the measurement site; and an information correction unit that corrects the position information of the storage unit on the basis of the predetermined angle and the relative movement amount.