Working Head Rocking Mechanism for Precision Grinding
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Solution Overview
Problem
Conventional working apparatuses face challenges in maintaining machining uniformity and precision as workpieces decrease in size during the grinding and super-finishing process, often resulting in one-sided contact or interference issues with the grinding wheel, leading to potential damage to the workpiece.
Innovation Solution
A working head moving device with a trunnion support portion that allows the working head to rock about an axis of oscillation, maintaining a constant angle of intersection between the workpiece-contacted surface and the axis of rotation, coupled with a parallel link mechanism for smooth movement and precise positioning, preventing damage and ensuring uniform contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the working head is pressed against the workpiece during machining, then machining precision is improved, but as the workpiece size decreases, one-sided contact occurs leading to machining uniformity deterioration
Solution Approach 1:
The working head is designed to rock about an axis of oscillation perpendicular to the rotation axis, allowing dynamic adjustment of the contact position. This rocking motion compensates for workpiece size reduction during machining, maintaining uniform contact across the entire workpiece surface and preventing one-sided contact that would occur with a fixed positioning system.
Solution Approach 2:
The system changes the positional parameters of the working head by allowing it to rock between different contact positions. The axis of oscillation is positioned at a specific distance from the rotation axis, creating a rocking path that adjusts the contact point dynamically. This parameter change enables the working head to adapt to varying workpiece sizes and maintain machining uniformity throughout the process.
2Adaptability or versatility
If the working head is moved vertically to accommodate workpiece size reduction, then adaptability is improved, but the working head may interfere with and damage the workpiece
Solution Approach 1:
Instead of vertical movement, the working head employs rocking motion about an oscillation axis. This dynamic movement allows the working head to adapt to workpiece size reduction by adjusting the contact position through rocking, rather than moving vertically which would cause interference and damage to the workpiece.
Solution Approach 2:
The system transitions from vertical (one-dimensional) movement to rocking motion in a different dimensional plane. The axis of oscillation is positioned horizontally, allowing the working head to rock in an arc that accommodates workpiece size changes without vertical interference, thus avoiding workpiece damage while maintaining adaptability.
3Device complexity
If a fixed positioning system is used for the working head, then device complexity is reduced, but machining precision deteriorates as workpiece size changes
Solution Approach 1:
The positioning system incorporates a rocking mechanism that adds dynamic capability without excessive complexity. The working head rocks about a fixed oscillation axis, providing automatic adaptation to workpiece size changes through the rocking motion itself, rather than requiring complex active control systems or multiple adjustment mechanisms.
Solution Approach 2:
The working head's rocking motion automatically compensates for workpiece size changes without requiring external control or adjustment. The geometric relationship between the oscillation axis position and the rotation axis creates a self-adjusting system that maintains machining precision through its own motion characteristics, eliminating the need for complex feedback control.
Data Source
AI summary
The working head moving device adopted in the working apparatus for machining workpiece supported by the work setting section having the underside-abutting portion and the side-abutting portion can maintain proper machining conditions with adaptability to decrease in size of workpiece entailed by proceeding of machining, can perform machining on workpiece with high uniformity and precision, and can move the working head without causing damage to workpiece. There is provided the head moving system for moving the working head between the working-state position and the retracted-state position, and the head moving system has the trunnion support portion which allows the working head to rock about its oscillation axis perpendicular to the rotation axis of the rotary tool when the working head is pressed against workpiece in conformity with decrease of workpiece size entailed by proceeding of machining, thereby maintaining the angle of intersection of workpiece-contacted surface and the rotation axis invariant.