Conical Ball Spacer Pocket for Collision-Free Lapping
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Solution Overview
Problem
Balls used in machining processes are prone to damage due to collisions during lapping and grinding operations, particularly for larger ceramic balls.
Innovation Solution
An apparatus with a spacer having a pocket with varying diameters and a guide element to accommodate and guide balls, preventing direct contact and damage, while allowing uniform grinding and lapping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If balls are machined in a ball groove without spacers, then productivity is improved by allowing multiple balls to be processed simultaneously, but the risk of ball-to-ball collision and damage increases
Solution Approach 1:
A spacer is introduced as an intermediary element between adjacent balls in the ball groove. The spacer physically separates the balls, preventing direct contact and collision while allowing both balls to be processed simultaneously in the same groove, thus resolving the contradiction between productivity and reliability
Solution Approach 2:
The ball groove is effectively segmented into separate zones by the spacer, creating individual processing zones for adjacent balls. This segmentation allows multiple balls to be processed simultaneously while preventing harmful interactions between them
2Reliability
If a spacer with a fixed diameter pocket is used, then ball-to-ball collision is prevented, but the spacer cannot adapt to changing ball diameters during the machining process
Solution Approach 1:
The spacer pocket is designed with a conical shape (varying diameter from top to bottom) rather than a fixed cylindrical shape. This dynamic geometry allows the pocket to accommodate balls of different diameters at different stages of machining, maintaining reliability while adapting to dimensional changes
Solution Approach 2:
The pocket diameter parameter varies along the depth of the spacer, creating a gradient structure. This parameter change allows the spacer to accommodate balls as their diameter changes during machining, combining collision prevention with adaptability
3Adaptability or versatility
If the pocket diameter is made larger to accommodate larger balls, then larger balls can be processed, but the spacer may not provide adequate separation for smaller balls
Solution Approach 1:
The conical pocket geometry provides a dynamic fit where the spacer adapts to different ball sizes. The varying diameter ensures that smaller balls are held securely for effective separation while larger balls can also be accommodated, maintaining reliability across different sizes
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
Reduces the risk of ball-to-ball collisions, protecting the balls from damage and ensuring uniform machining by allowing free rotation and adaptation to changing diameters during the process.
Implementation Method 1
As the balls roll on the surfaces of the ball groove or disc, a sliding movement of greater or lesser magnitude may occur, this being referred to as the lapping movement
Implementation Method 2
the apparatus has at least one spacer, which has a main body with a pocket, in which a ball can be accommodated
Data Source
AI summary
An apparatus for lapping and/or grinding balls includes at least one disc having at least one encircling ball groove configured to receive and guide a plurality of balls, and a plurality of spacers each having a pocket configured to receive a respective one of the plurality of balls. Each of the pockets has a first region having a first diameter and a second region having a second diameter smaller than the first diameter.