Adjustable Power Supply Terminal for Wire EDM Stability
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Solution Overview
Problem
In multi-wire electrical discharge machining, variations in contact pressure between the power supply terminal and the wire group lead to unstable power supply and increased wear, making long-term stable machining difficult.
Innovation Solution
A power supply unit with a mounting portion for the power supply terminal and an adjusting portion to adjust the inclination of the mounting portion across the wire group's running direction, ensuring parallel contact and reducing pressure variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the power supply terminal is pressed hard against the wire group to stably supply power, then the power supply stability is improved, but the degree of wear of the power supply terminal and damage of the wire increases
Solution Approach 1:
The mounting portion is designed to be adjustable in inclination angle, allowing the contact configuration to be optimized dynamically. By adjusting the inclination angle within a specific range, the system achieves stable power supply without excessive contact pressure, thereby reducing wear while maintaining reliability.
2Duration of action of moving object
If the power supply terminal is not pressed hard against the wire group, then the wear and damage are reduced, but the power supply stability deteriorates due to contact pressure variation
Solution Approach 1:
The inclination angle of the mounting portion is changed as a key parameter to optimize the contact characteristics. By adjusting this angle, the contact pressure distribution is optimized to achieve both stable power supply and reduced wear, resolving the contradiction between reliability and service life.
3Device complexity
If the power supply terminal contacts the wire group at an arbitrary angle, then the device complexity is reduced, but the contact pressure variation increases leading to unstable power supply
Solution Approach 1:
Instead of fixing the mounting portion at a rigid arbitrary angle, the design allows adjustment of the inclination angle. This dynamic adjustment capability enables optimization of contact pressure distribution while maintaining relatively simple device structure, achieving stable power supply without significant complexity increase.
Data Source
AI summary
Provided is a power supply unit, which is to be used for a multi-wire electrical discharge machining apparatus arranged to slice a material to be machined by an electrical discharge generated between a wire group including a plurality of turns of a wire arranged in parallel and the material to be machined, and to which a power supply terminal to be brought into contact with the wire group at a time to supply a voltage to the wire group is mounted, the power supply unit including: a mounting portion to which the power supply terminal to be brought into contact with the wire group at a time is mounted; and an adjusting portion arranged to adjust an inclination of the mounting portion in a direction crossing a running direction of the wire group.