Bearing Ring Inversion Geometry for Consistent Forming Quality
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Solution Overview
Problem
The design of punches and dies for inversion working in bearing ring member manufacturing is challenging, leading to variations in design quality and reduced work efficiency due to reliance on experience, making it difficult to consistently perform inversion working satisfactorily.
Innovation Solution
A method involving a punch with a first R surface and a die with a second R surface and a tapered surface, allowing for geometrically determined inversion steps to facilitate the design and manufacture of bearing ring members, with specific conditions to prevent sliding and biting during deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a tapered punch and composite R shape die are used for inversion working, then the bearing ring member can be manufactured, but the design is difficult and relies on experience, causing large differences between designers
Solution Approach 1:
The invention changes the geometric parameters of the punch and die by specifying exact formulas for the R-surface radius (R1 = (D1-D2)/8 + t/2) and taper angle (α = 15°), transforming an experience-based design into a calculated design that ensures consistent inversion working quality across different designers
Solution Approach 2:
The invention creates a standardized design model with specific geometric parameters that can be copied and applied universally, eliminating the need for each designer to independently develop tapered shapes and composite R shapes through experience
2Reliability
If design relies on experience, then inversion working can be performed, but work efficiency decreases due to design concentration on specific designers
Solution Approach 1:
The invention makes the design process self-service by providing explicit formulas and parameters that any designer can use independently, eliminating the need to concentrate design work on experienced designers and enabling broader participation while maintaining reliability
Solution Approach 2:
The invention performs preliminary calculation of the optimal geometric parameters before manufacturing, establishing the R-surface radius and taper angle through formulas rather than trial and error, which streamlines the design process and improves work efficiency
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
Facilitates the design and manufacture of bearing ring members by ensuring satisfactory inversion working through geometric calculations, reducing designer variability and improving work efficiency.
Implementation Method 1
an inversion step of deforming a workpiece having an annular shape by sandwiching the workpiece between a punch disposed on a first side in a predetermined direction and a die disposed on a second side opposite to the first side
Data Source
AI summary
A method for manufacturing a bearing ring member includes an inversion step of deforming a workpiece having an annular shape by sandwiching the workpiece between a punch disposed on a first side in a predetermined direction and a die disposed on a second side. The punch has a first R surface formed in a circular arc shape. The die has a second R surface formed in a circular arc shape, and a tapered surface inclined with respect to the predetermined direction. The inversion step includes a first step of deforming the workpiece using the punch and the die in a state where the first R surface and the second R surface are in contact with the workpiece, and a second step of deforming the workpiece using the punch and the die in a state where the first R surface and the tapered surface are in contact with the workpiece.