Grinding Wheel Through-Holes for Dust-Free Chamber Cleaning

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Solution Overview

Problem

In grinding apparatuses, grinding dust adheres to the inner walls of the grinding chamber, potentially falling onto the workpiece during finish grinding, causing damage to the workpiece or abrasive members, and can accumulate to form larger dust particles that drop by gravity, damaging the workpiece or abrasive members.

Innovation Solution

A grinding wheel with an annular base and through holes that extend from the inner to the outer surface, utilizing centrifugal force to scatter grinding water and wash away dust from the chamber walls, preventing dust from adhering to the workpiece and improving chamber cleaning efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If grinding water is supplied along the inner circumferential surface of the grinding wheel, then cooling and lubrication during grinding is improved, but grinding dust adheres to the inner wall of the grinding chamber and may drop onto the workpiece causing damage

Engineering Contradiction:

Improvecooling effectVSAvoidgrinding dust adhesion

Core Design Contradiction:

TemperatureVSObject-affected harmful factors

Solution Approach 1:

The invention divides the grinding wheel structure into multiple segments by providing plural through-holes at different radial positions. This segmentation allows grinding water to be discharged at multiple locations, creating multiple cleaning zones that prevent dust accumulation across the entire chamber, thereby resolving the contradiction between cooling effectiveness and dust adhesion prevention

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention introduces an intermediary mechanism where grinding water serves dual purposes: first as a cooling medium during grinding, then as a cleaning agent discharged through the through-holes to wash away dust from the chamber walls. This intermediary use of the same fluid resolves the contradiction by transforming the cooling water into a protective cleaning agent

Inventive Principle:

Principle #24Intermediary (Mediator)

2Quantity of substance

If grinding water containing grinding dust sticks to the inner wall of the grinding chamber, then the chamber walls become coated with dust, but this dust may combine to form large particles that drop by gravity onto the workpiece or abrasive members causing damage

Engineering Contradiction:

Improvegrinding water retentionVSAvoidworkpiece protection

Core Design Contradiction:

Quantity of substanceVSReliability

Solution Approach 1:

The invention applies preliminary action by continuously discharging grinding water through the through-holes during the grinding process. This continuous discharge prevents dust accumulation before it can form large particles, proactively eliminating the hazard rather than reacting to it after formation

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The invention converts the harmful effect of grinding dust adhesion into a beneficial cleaning action. By discharging grinding water through strategically positioned through-holes, the system uses the dust-laden water to wash and clean the chamber walls, transforming what would be a harmful accumulation into a useful self-cleaning mechanism

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Object-affected harmful factors

If multiple through holes are provided in the annular base, then grinding water is scattered in different directions improving chamber cleaning, but the structure of the grinding wheel becomes more complex

Engineering Contradiction:

Improvechamber cleaning effectivenessVSAvoidgrinding wheel structure

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The invention applies the porous materials principle by providing multiple through-holes in the annular base, creating a porous-like structure that allows fluid passage. This simple hole-pattern approach achieves multi-directional water scattering and effective chamber cleaning without requiring complex mechanical components, thereby resolving the contradiction between cleaning effectiveness and structural complexity

Inventive Principle:

Principle #31Porous materials

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

Prevents grinding dust from adhering to the workpiece by effectively washing away dust from the chamber walls, reducing the risk of damage and maintaining a clean grinding environment, thereby ensuring accurate finish grinding without damage to the workpiece or abrasive members.

Implementation Method 1

the grinding water is scattered in different directions from the through holes

Methodology Applied

Scientific EffectCentrifugal force: Centrifugal Force

Data Source

PatentUS9731400B2Grinding wheel and cleaning method for grinding chamber

Publication Date: 2017.08.15 DISCO CORP

AI summary

A grinding wheel includes an annular base and a plurality of abrasive members fixed to the lower surface of the base and arranged annularly. The base has a plurality of through holes for discharging a grinding water. The plural through holes radially extend from the inner side surface to the outer side surface of the base. The plural through holes are arranged at given intervals in the circumferential direction of the base so that the grinding water is scattered in different directions from the through holes.