Green Ball Grinding Device for High Sphericity
Solution Overview
Problem
The existing green ball grinding methods, particularly those involving self-rotating ceramic spheres, face challenges in achieving high sphericity due to restricted modification in the self-rotating direction, leading to insufficient sphericity and reduced grinding efficiency, and suffer from low mass productivity due to time-consuming processes in sandwiching and removing multiple green balls.
Innovation Solution
A method and apparatus that alternately apply load and modify the rotation axis of the green ball by reducing the load to allow gyroscopic precession, enabling isotropic working and improving sphericity, while incorporating a distance changing region and a ground particle removal mechanism to prevent clogging and maintain efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the green ball is continuously restrained by the upper and lower working plates during grinding, then the grinding process can be maintained, but the self-rotating direction of the green ball is restricted, leading to insufficient sphericity
Solution Approach 1:
The patent applies dynamics by periodically changing the restraint state of the green ball during grinding. The working plates alternately apply and release load on the green ball, allowing the rotation axis to dynamically adjust between constrained and free states. This dynamic control enables the green ball to achieve isotropic working conditions, improving sphericity while maintaining processability.
2Productivity
If the mesh of the rough faced constituent member and/or the hole provided at the working plate is used to allow passage of ground particles, then grinding can proceed, but the mesh and hole may be clogged by ground particles, inducing degradation in grinding efficiency
Solution Approach 1:
The patent extracts ground particles from the grinding zone by providing a ground particle removal mechanism that actively removes particles from the mesh and holes of the rough faced constituent member. This prevents clogging and maintains consistent grinding efficiency throughout the process.
3Productivity
If multiple green balls are sandwiched between upper and lower working plates for simultaneous processing, then mass productivity can be improved, but the task of sandwiching and removing the green balls is time consuming
Solution Approach 1:
The patent merges the sandwiching and removing operations for multiple green balls into a single integrated process. By simultaneously processing multiple green balls between the upper and lower working plates and coordinating their entry and exit, the system reduces the total time required for these operations while maintaining high mass 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
The method achieves higher sphericity and improved grinding efficiency by allowing isotropic working and reducing clogging, enabling the processing of multiple green balls simultaneously with increased productivity.
Implementation Method 1
modifying the rotation axis of the green ball by reducing the load lower than in the step of causing green ball grinding to proceed are executed alternately
Data Source
Figure 1~2
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AI summary
A green ball (91) grinding method includes the step (S20) of supplying a green ball (91) between a first surface (11) of a first member (10) and a second surface (21) of a second member (20) constituting a grinding apparatus (1), and the step of grinding the green ball (91) between the first surface (11)and the second surface (21) while the green ball (91) rotates around its own axis and in orbital motion. In the step of grinding the green ball (91), the step (S30) of causing the green ball (91) grinding to proceed while applying load between the green ball (91) and each of the first surface (11) and the second surface (21), and the step of modifying the rotation axis of the green ball (91) by reducing the load lower than in the step (S30) of causing the green ball (91) grinding to proceed are executed alternately.