Disc-Shaped Truer Forming via Multi-Groove Master Grinding Wheel
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Solution Overview
Problem
Conventional methods for truing chamfering devices struggle to change the shape of the truer accurately and efficiently, leading to reduced precision and increased costs due to the need for frequent replacement or reformation of grinding wheels, and result in suboptimal dimensional accuracy and edge shape quality.
Innovation Solution
A method involving a disc-shaped truer formed by multiple master grooves with different shapes, where the first groove adjusts the diameter and rough shape, and the second groove refines the edge shape, allowing for precise edge processing and corner rounding prevention, thereby improving the transfer rate and workability while maintaining quality uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single master groove is used for truing the chamfering wheel, then the device complexity is reduced, but the manufacturing precision of the edge shape deteriorates
Solution Approach 1:
The master grinding wheel is divided into multiple grooves (first groove for rough shaping, second groove for edge refinement) that perform different functions in sequence. This segmentation allows each groove to be optimized for its specific purpose, with the first groove removing material efficiently and the second groove precisely forming the final edge shape, thereby resolving the contradiction between device simplicity and manufacturing precision.
2Productivity
If the truer is processed quickly with a single groove, then the productivity is improved, but the manufacturing precision of the corner shape deteriorates
Solution Approach 1:
The truing process is segmented into two stages: rough shaping by the first groove (high productivity) and corner refinement by the second groove (high precision). This allows the corner R processing to be performed separately with optimized parameters, preventing corner rounding while maintaining overall processing efficiency.
Solution Approach 2:
The first groove performs preliminary shaping of the truer, removing the majority of material quickly. This preliminary action prepares the truer for the second groove, which then focuses on precise corner formation without the burden of excessive material removal, thereby achieving both productivity and precision.
3Device complexity
If the same groove is used for both rough shaping and edge refinement, then the device complexity is reduced, but the manufacturing precision of dimensional accuracy deteriorates
Solution Approach 1:
Different grooves are designed with different local qualities suited to their specific functions. The first groove has characteristics optimized for rough shaping (larger depth, different profile), while the second groove has characteristics optimized for precise edge formation (controlled depth, refined profile). This local quality differentiation enables each groove to perform its function with high dimensional accuracy.
Solution Approach 2:
The master grinding wheel structure is made dynamic and adaptable by incorporating multiple grooves that can be selectively engaged. The grooves have different depths and profiles that allow the system to adapt to different processing stages, enabling precise control over the truing process and dimensional accuracy of the final product.
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 reduces time and cost for truer formation, enhances the precision of the edge shape and dimensional accuracy of the groove, and prevents corner rounding, resulting in improved accuracy of the finally chamfered shape.
Implementation Method 1
a process A for adjusting a diameter and a rough shape of the truer by a master grinding wheel
Implementation Method 2
a process B for forming an edge of the truer into a target shape
Data Source
AI summary
A method of forming a truer in a truing where a groove of a grinding wheel used for grinding a chamfer portion of a wafer is formed by a truer having a disc-shape, wherein the method comprising: a process A for adjusting a diameter and a rough shape of the truer by a master grinding wheel for forming the truer; and a process B for forming an edge of the truer into a target shape, wherein the process A and the process B are performed by a plurality of master grooves having different shapes from each other, the plurality of master grooves being provided with the master grinding wheel or the process A and the process B are performed by a plurality of portions having different shapes from each other in at least one of the plurality of master grooves provided with the master grinding wheel.