Grindstone Binder Spherical Fillers Prevent Workpiece Damage

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Solution Overview

Problem

Grindstones with angular fillers enhance mechanical strength but can cause defective processing due to sharp projections interfering with workpieces during grinding.

Innovation Solution

Incorporating spherical ceramic fillers with an aspect ratio of 0.7 or higher into the binder of grindstones to reinforce the binder and prevent projections from colliding with workpieces.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If angular filler particles are used in the binder, then mechanical strength of the binder is enhanced, but sharp angular parts project from the binder and cause defective processing

Engineering Contradiction:

Improvemechanical strength of binderVSAvoiddefective processing

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

The patent applies the spheroidality principle by replacing angular filler particles with spherical filler particles in the binder. The spherical shape eliminates sharp angular parts that would otherwise project from the grindstone surface and collide with workpieces. This curvature transformation maintains the reinforcing effect on binder strength while preventing defective processing caused by projecting angular parts.

Inventive Principle:

Principle #14Spheroidality (Curvature)

2Strength

If size of angular filler is enlarged to enhance strength, then mechanical strength increases, but projecting angular parts collide against workpiece during processing

Engineering Contradiction:

Improvestrength of grindstoneVSAvoidprocessing efficiency

Core Design Contradiction:

StrengthVSProductivity

Solution Approach 1:

The patent resolves this contradiction by using spherical filler particles instead of angular ones. This allows enlargement of filler size to enhance strength without the harmful effect of sharp projections. The spherical geometry ensures that even larger particles do not create defective processing, thus maintaining high processing efficiency while achieving the desired strength enhancement.

Inventive Principle:

Principle #14Spheroidality (Curvature)

Solution Approach 2:

The patent changes the geometric parameter of the filler particles from angular to spherical shape. This parameter change fundamentally alters the interaction between filler particles and workpiece, allowing for optimization of particle size to enhance strength without compromising processing quality. The spherical shape parameter enables larger particles to be used beneficially.

Inventive Principle:

Principle #35Parameter changes

3Duration of action of stationary object

If filler is added to binder, then mechanical strength is enhanced and useful life is prolonged, but angular parts may interfere with workpiece

Engineering Contradiction:

Improveuseful life of binderVSAvoidinterference with workpiece

Core Design Contradiction:

Duration of action of stationary objectVSObject-affected harmful factors

Solution Approach 1:

The patent applies spheroidality by using spherical filler particles to reinforce the binder. This shape modification allows the filler to perform its reinforcing function, extending the useful life of the binder, while simultaneously eliminating the harmful interference that angular particles would cause to workpieces during processing.

Inventive Principle:

Principle #14Spheroidality (Curvature)

Data Source

PatentUS20240066665A1grindstone

Publication Date: 2024.02.29 DISCO CORP

AI summary

A grindstone includes abrasive grains and a binder for fixing the abrasive grains, and the binder contains a spherical filler for reinforcing the bonding material.