Rotary Abrasive Tool Hub With Replaceable Pinned Segments
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Solution Overview
Problem
Existing rotary abrasive machining tools face difficulties in individually replacing damaged or worn abrasive segments without disturbing the rest, requiring profiling of all segments and using excessive material.
Innovation Solution
The use of pin elements that extend through both the abrasive segments and the hub allows for individual segment replacement and realignment, reducing material volume and enabling simpler profiling and cost reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If abrasive segments are secured using flanges or rings as in prior art, then the segments are held firmly in position, but individual segment replacement becomes difficult and requires disturbing all segments
Solution Approach 1:
The mounting structure is segmented by providing individual mounting slots in the hub for each abrasive segment, allowing each segment to be independently mounted and removed without affecting other segments. This is achieved through separate radial slots and individual retention mechanisms for each segment position.
Solution Approach 2:
The retention function is extracted from a unified flange or ring structure and distributed to individual mounting features integrated into the hub. Each abrasive segment has its own dedicated mounting slot and retention mechanism, allowing independent extraction and replacement of segments.
2Loss of time
If all abrasive segments are profiled together as in prior art, then uniformity is maintained, but time and complexity increase when only one segment needs replacement
Solution Approach 1:
The profiling operation is segmented so that each abrasive segment can be profiled independently after installation. The hub's mounting structure allows segments to be positioned individually, enabling selective profiling of only the replaced segment rather than requiring all segments to be profiled together.
Solution Approach 2:
The mounting structure is designed with pre-formed radial slots and retention features that guide and pre-position abrasive segments correctly before profiling. This preliminary positioning ensures proper alignment is achieved during installation, reducing or eliminating the need for subsequent profiling of all segments.
3Strength
If abrasive segments are designed with larger material volume as in prior art, then durability and strength are improved, but material cost and production cost increase significantly
Solution Approach 1:
The abrasive segments are designed with local quality by concentrating material only where needed for the abrading function. The segments have reduced overall volume with material strategically placed at the cutting edge and minimal backing, rather than uniform thick construction. This maintains cutting effectiveness while reducing material consumption.
Solution Approach 2:
The abrasive segments are designed as inexpensive, easily replaceable components with reduced material volume. The individual mounting structure enables quick replacement of worn segments, making the system tolerant of shorter-lived, lower-cost segments rather than requiring durable, expensive segments that must protect against all failure modes.
Data Source
AI summary
This disclosure relates to a rotary abrasive machining tool comprising a hub with a plurality of axially extending radial slots in an outer circumference thereof, and a plurality of abrasive segments, typically polycrystalline diamond, located in the radial slots.