Wire Guide Fixing Mechanism for Wire EDM
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Solution Overview
Problem
The existing fixing mechanisms for wire guides in wire electric discharge machines suffer from low restoration accuracy and high maintenance costs due to loose-fitting screw configurations, leading to errors in positioning and prolonged measurement times during wire guide exchanges, which hinder productivity.
Innovation Solution
A fixing mechanism that separates the wire guide into a consumable part and a highly-accurately machined fixing part, utilizing V-shaped planar parts, convex and concave fittings, and cylindrical features to enhance positional accuracy and allow for cost-effective reuse of the fixing part, thereby improving the restoration accuracy and reducing the need for frequent measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a screw part with both positioning and fixing roles is used, then the structure is simplified, but the restoration accuracy of the wire guide fixing position deteriorates due to loose-fitting structure
Solution Approach 1:
The screw part is divided into two separate functional components: a positioning screw that provides precise XY direction positioning through a loose-fitting structure, and a fixing screw that secures the wire guide to the wire guide supporting part. This segmentation allows each screw to be optimized for its specific function, resolving the contradiction between structural simplicity and restoration accuracy.
2Adaptability or versatility
If the wire guide is exchanged frequently to adapt to different machining conditions, then the adaptability is improved, but the productivity deteriorates due to long measurement time required for each exchange
Solution Approach 1:
The positioning screw and fixing screw are pre-configured with specific functions and structures that enable rapid positioning and securing of the wire guide. The positioning screw's loose-fitting structure allows for quick insertion and positioning, while the fixing screw provides immediate secure attachment, eliminating the need for time-consuming measurements after each wire guide exchange.
3Ease of manufacture
If a loose-fitting screw structure is used, then the ease of manufacture is improved, but the positioning accuracy deteriorates due to gap between male and female screws
Solution Approach 1:
The screw mechanism is segmented into positioning and fixing functions. The positioning screw uses a loose-fitting structure that is easy to manufacture, while the fixing screw provides secure attachment. This segmentation allows the system to benefit from the manufacturing ease of loose-fitting structures without sacrificing overall positioning accuracy.
Solution Approach 2:
The positioning screw acts as an intermediary between the wire guide and the wire guide supporting part, providing preliminary positioning in the XY direction before the fixing screw secures the assembly. This intermediary positioning mechanism compensates for the gaps in the loose-fitting structure, maintaining positioning accuracy while preserving manufacturing ease.
Data Source
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AI summary
On a wire guide supporting face (12c) of a wire guide supporting part (12) which supports a wire guide (14) of a wire electric discharge machine, two wall faces (12a, 12b) which are orthogonal to the wire guide supporting face (12c) are arranged in a V shape. On the other hand, two planar parts (14a, 14b)which are abutted on the two orthogonal wall faces (12a, 12b) of the wire guide supporting part (12) are formed on the wire guide. Then, the wire guide (14) is fixed on the wire guide supporting part with a screw in a state in which the two orthogonal wall faces (12a, 12b) of the wire guide supporting part (12) and the two planar parts (14a, 14b) of the wire guide (14) are respectively abutted on each other.