Protrusion-Recess Assembly with Protective Agent Gap Formation
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Solution Overview
Problem
Accurate alignment of members with protrusions and recesses is challenging due to gaps and tilting issues, leading to unnecessary forces and potential damage in the assembly process.
Innovation Solution
A manufacturing method involving the use of a protective agent between the side surfaces of a protrusion and recess, which is released after assembly to create a gap, ensuring precise alignment and avoiding direct contact forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the protrusion and recess are fitted closely to achieve accurate alignment, then alignment precision is improved, but it becomes difficult to insert them coaxially and they may tilt during assembly
Solution Approach 1:
A protective agent is introduced as an intermediary substance between the protrusion and recess. This agent allows the protrusion to be inserted smoothly into the recess without direct contact, preventing tilting while maintaining alignment precision. After assembly, the protective agent is released, creating a gap that prevents unnecessary force application.
Solution Approach 2:
The protective agent is applied to the protrusion or recess surface before the assembly operation. This preliminary action prepares the surfaces to facilitate smooth insertion and coaxial alignment, preventing tilting during the fitting process while maintaining precise alignment.
2Ease of operation
If a tapered chamfered portion is provided to facilitate fitting, then ease of insertion is improved, but the protrusion may be inserted at an angle causing tilting and unnecessary forces
Solution Approach 1:
The protective agent serves as a mediator that allows the protrusion to be inserted without direct contact with the recess surface. This eliminates the need for tapered chamfered portions that could cause tilting, while still facilitating smooth insertion and maintaining accurate coaxial alignment.
3Manufacturing precision
If the protrusion adheres closely to the recess for accurate alignment, then alignment precision is improved, but unnecessary forces are applied to the members during assembly
Solution Approach 1:
The protective agent acts as a temporary intermediary that enables precise alignment during insertion without creating direct contact forces. After assembly, the protective agent is released to create a gap, eliminating unnecessary force application while maintaining alignment precision.
Solution Approach 2:
The protective agent is applied before assembly to enable precise alignment without force. After the alignment function is fulfilled, the protective agent is released to create a gap, preventing unnecessary force application during subsequent operations.
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
Enables accurate coaxial alignment of members with reduced stress and force application, preventing damage and improving assembly quality.
Implementation Method 1
releasing the protective agent to the outside so as to form the gap between the protrusion and the recess, the protective agent being arranged between the side surface of the protrusion and the side surface of the recess
Data Source
AI summary
This assembly member production method includes a step for disposing a coating agent at the lateral surface of a protruding part of a first member and the lateral surface of a recessed part of a second member so as to be able to be discharged to the outside after the second member is assembled to the first member. The production method includes a step for fitting the protruding part and the recessed part and assembling and fixing the second member to the first member. The production method includes a step for discharging outward the coating agent disposed between the lateral surface of the protruding part and the lateral surface of the recessed part and forming a gap between the protruding part and the recessed part.