Slitted Working Jig for Uniform Radial Plastic Deformation
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Solution Overview
Problem
Conventional plastic working devices struggle to simultaneously deform multiple circumferential positions of a workpiece in the radial direction without degrading the outer appearance or compromising the strength of the target portions.
Innovation Solution
A working jig with a body featuring a center hole, multiple slits, chuck elements, punching portions, and an aperture, allowing for simultaneous plastic deformation of multiple circumferential positions of a workpiece, along with a die set and manufacturing method to produce the working jig with high accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a load is applied to a circumferential position of the workpiece from the outside in the radial direction, then the target portion can be plastically deformed, but the workpiece is awkwardly deformed and the outer appearance is degraded
Solution Approach 1:
The working jig divides the workpiece into multiple target portions at different circumferential positions. By providing multiple punching portions (first, second, third, and fourth punching portions) that simultaneously plastic work four different target portions, the device achieves uniform deformation distribution while maintaining the workpiece's outer appearance.
2Productivity
If target portions are formed at two circumferential positions by applying load from both sides, then more positions can be worked, but the central axis of the first component may deviate from the central axis of the second component
Solution Approach 1:
The working jig is segmented into multiple independent punching portions (first, second, third, fourth punching portions) arranged at different circumferential positions. Each punching portion can independently plastic work a target portion while maintaining precise axial alignment through the jig's structured design, enabling simultaneous processing of four target portions without axis deviation.
Solution Approach 2:
The working jig employs an asymmetric arrangement of punching portions at different circumferential positions (with specific angular separations) to achieve uniform deformation distribution. This asymmetric configuration allows simultaneous plastic working of multiple target portions while maintaining precise axial alignment between the first and second components.
3Stability of the object's composition
If diameter reduction processing is applied by a plurality of striking members, then the whole circumference can be evenly plastically deformed, but very large facilities are required and it is difficult to deform part of a tiny workpiece
Solution Approach 1:
The working jig segments the plastic working function into multiple punching portions (first, second, third, fourth punching portions) that can simultaneously process multiple target portions. This segmentation enables uniform plastic deformation of the workpiece circumference while using a compact device structure that can handle tiny workpieces without requiring large facilities or excessive grip.
Solution Approach 2:
The working jig transitions from conventional radial striking methods to a multi-dimensional approach by providing punching portions at different circumferential positions and depths. This dimensional arrangement allows simultaneous plastic working of multiple target portions in a compact configuration, eliminating the need for large facilities while maintaining uniform deformation.
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 efficient and accurate plastic working of multiple positions on a workpiece simultaneously, maintaining the integrity of the workpiece's outer appearance and strength, while also accommodating smaller workpieces.
Implementation Method 1
plastically working a workpiece... plastically deforming part of the first component toward the second component in the radial direction by the load
Data Source
AI summary
According to an embodiment, a working jig has a body formed of metal having wear-resistance. A tapered surface is formed in an outer circumference of a distal end portion of the body. The tapered surface has a shape in which a diameter decreases toward an end face of the body. A center hole is formed in the body. Slits are formed at a plurality of positions in a circumferential direction of the body. The slits extend from the end face to positions in a length direction of the body in a direction along an axis. Chuck elements are formed between the slits which are adjacent to each other in the circumferential direction of the body. Punching portions are formed at distal ends of the chuck elements, respectively.