Press-Fit Joined Member Assembly for Stable High-Strength Joints
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Solution Overview
Problem
Conventional welding methods require skilled expertise, making it difficult to detect joining strength and leading to inconsistent product quality, and are not suitable for materials with low heat resistance.
Innovation Solution
A method of joining members using press working, where bridge-shaped portions of one work member engage with corresponding openings in another, with a connecting member inserted and pressed to form a stable and strong joint, eliminating the need for high heat treatment and skilled labor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If welding is used to join members, then joining strength is improved, but product quality consistency deteriorates due to worker skill dependency
Solution Approach 1:
The patent replaces the welding process (thermal/mechanical system requiring skill) with a press-fit mechanical joining system. The bridge portion is inserted into the opening and fixed with a connecting member through press working, eliminating dependency on worker welding skills while maintaining high joining strength and achieving consistent quality through standardized mechanical operations.
2Strength
If welding is used to join members, then joining strength is improved, but detection of joining strength becomes difficult
Solution Approach 1:
The patent utilizes visual inspection capabilities by designing the bridge portion and opening interface to allow direct observation of the joining state. The press-fit mechanical connection creates visible indicators of proper assembly, enabling easy detection and measurement of joining quality without complex testing equipment.
3Strength
If welding is used to join members, then joining strength is improved, but applicability to low heat resistance materials deteriorates
Solution Approach 1:
The patent replaces the welding process (which generates high heat) with a press-fit mechanical joining system. This substitution eliminates thermal effects entirely, allowing the method to be applied to materials with low heat resistance that would be damaged or degraded by welding temperatures, while still achieving high joining strength through mechanical interlocking.
4Ease of operation
If press working is used to join members, then ease of operation is improved, but joining strength must be maintained at high levels
Solution Approach 1:
The patent incorporates a bridge portion pre-formed with an insertion hole and an opening pre-formed in the workpiece. These preliminary structural preparations enable straightforward press-fit assembly operations while ensuring that the geometric configuration provides sufficient mechanical interlocking strength. The connecting member is then simply pressed into the pre-prepared insertion hole to complete the high-strength joint.
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
This method enables the production of members with high strength and stable joints, independent of worker skill, suitable for materials with low heat resistance, enhancing working efficiency and ensuring consistent quality without the need for high heat treatment.
Implementation Method 1
press working step where the first bridge portion of the first work member, the second opening of the second work member and the connecting member are integrally formed with each other by pressing
Data Source
AI summary
A method of manufacturing a joined member where joining portions of at least two members are integrally formed with each other by press working thus joining said at least two members, the method comprises an engaging step, an inserting step, and a press working step.