Clutch Hub Runout Correction via Plastic Deformation
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Solution Overview
Problem
Conventional methods for correcting surface runout in armature surfaces of clutch hubs are inefficient, requiring extensive grinding time and reducing productivity.
Innovation Solution
A deformation processing apparatus that includes a support member, press mechanism, and fixing member to elastically support and correct the inclination of the armature surface using a cylindrical pressing member, allowing for precise adjustment and deformation of the hub member to align the armature surface perpendicular to the axial member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If grinding is used to correct surface runout, then manufacturing precision is improved, but productivity deteriorates due to extensive processing time
Solution Approach 1:
The patent replaces the conventional grinding process (mechanical removal of material) with a deformation processing method that uses a pressing member to apply localized force, causing plastic deformation of the hub member to correct the runout. This substitution eliminates the need for extensive material removal while achieving the same alignment precision, thereby dramatically reducing processing time and improving productivity
Solution Approach 2:
The invention changes the processing approach from subtractive (grinding) to deformative (pressing). By controlling the pressing force, position, and duration, the hub member's shape is modified to correct runout without requiring the time-consuming grinding process. This parameter change in the processing method resolves the contradiction between precision and productivity
2Productivity
If high-spin deformation processing is applied to reduce surface level, then productivity is improved, but it is not suitable for correcting runout in armature surfaces of clutch hubs
Solution Approach 1:
The patent applies local quality by positioning the pressing member to apply force at specific locations on the hub member rather than uniformly across the entire surface. The pressing member can be positioned at different radial and axial locations to correct runout in the armature surface area, making the deformation processing method specifically adaptable to clutch hub applications while maintaining high productivity
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 approach significantly reduces the time required to correct surface runout, enhancing productivity by allowing for accurate and quick alignment without the need for extensive grinding, thereby improving manufacturing efficiency.
Implementation Method 1
a support member for placing thereon the clutch hub with the axial member oriented downward and for elastically supporting the end surface of the armature
Implementation Method 2
the pressing member plastically deforms the plate surface of the hub member by using the locating portion as a fulcrum, and thereby an inclination of the axial member with respect to the end surface of the armature can be corrected
Data Source
AI summary
The clutch hub includes a sheet-metal hub member which has an axial member projected from the center of its plate surface, and also includes an annular armature which is fixed to an outer peripheral portion of the axial member. First mounting the axial member of the clutch hub downward on a support member and thereby elastically supporting the end surface of the armature by the support member; holding the axial member of the clutch hub using a chuck; locating a fixing member just under a portion of a maximum runout portion of an inner hub; contacting a cylindrical end surface of a pressing member with an upper surface of the inner hub using pressure; and plastically deforming the inner hub by a pressing force of the pressing member using the locating portion of the fixing member as a fulcrum, which thereby corrects an inclination of the axial member.