Press-Fit Machined Article Structure for Minute Slit Precision
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional machining techniques face difficulties in forming holes of minute dimensions, as they are challenging to precision-machine.
Innovation Solution
The method involves an electric press machine that uses a combination of inner and outer peripheral recesses and slits between two members to create precisely machined slits of minute dimensions by fitting a second member into a first member, allowing for precise machining of minute holes and slits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional machining techniques are used to form holes of minute dimensions, then the machining process is difficult and precision is hard to achieve, but if alternative methods are adopted, then manufacturing complexity increases
Solution Approach 1:
The invention divides the formation of minute holes into two distinct stages: first forming large-diameter holes through conventional machining, then creating the final minute dimensions through a second pressing operation that forms the inner peripheral portion. This segmentation allows each stage to be optimized independently, achieving high precision for minute holes while maintaining ease of manufacture for the overall process.
Solution Approach 2:
The invention performs preliminary machining to create large-diameter holes before conducting the final pressing operation to achieve minute dimensions. This preliminary action prepares the workpiece in advance, making the subsequent precision pressing easier to execute and control, thereby resolving the contradiction between precision and manufacturing ease.
2Manufacturing precision
If a single pressing operation is used to form both outer and inner peripheral portions, then the process is simple, but precision control for minute dimensions is difficult
Solution Approach 1:
The pressing process is segmented into two separate operations: a first pressing that forms the outer peripheral portion with large dimensions, and a second pressing that forms the inner peripheral portion with minute dimensions. This segmentation enables independent optimization of each pressing operation, allowing precise control of clearances between the inner and outer peripheral portions while managing overall process complexity through systematic division.
Solution Approach 2:
The invention applies different pressing conditions and tooling configurations to different regions of the workpiece. The first pressing focuses on forming the outer peripheral portion with appropriate clearance, while the second pressing specifically targets the inner peripheral portion to achieve minute dimensions. This localized approach to quality control enables precise clearance management without requiring overly complex global process control.
Data Source
AI summary
A machined article 100 includes a first member 101 including an inner peripheral portion 101a formed by a hole, and a second member including an outer peripheral portion 102a fitted into the inner peripheral portion 101a of the first member 101. At least either an inner peripheral recess 101b to be formed in part of the inner peripheral portion 101a of the first member 101 or an outer peripheral recess 102b to be formed in part of the outer peripheral portion 102a of the second member 102 is formed. A slit 103 penetrating from a front to a back is formed at a position to which the inner peripheral recess 101b or the outer peripheral recess 102b corresponds, between the first member 101 and the second member 102.