Angled Grinder Motion for Uniform Disk Surface Grinding

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Solution Overview

Problem

Existing methods for grinding large disk-shaped workpieces struggle to maintain consistent surface roughness, leading to variations that can result in defective products.

Innovation Solution

A grinding processing apparatus with a rotary table, grinder, holding unit, and controller that controls the rotation and movement of the grinder to ensure uniform contact and pressure across the workpiece surface, using a combination of rotational and horizontal movements to reduce surface roughness variations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If automatic grinding processing apparatus is used, then grinding efficiency is improved, but surface roughness variation increases

Engineering Contradiction:

Improvegrinding efficiencyVSAvoidsurface roughness variation

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The grinding process is divided into multiple stages with different grinding stones having different grits (coarse, medium, fine). Each stage performs a specific function in the grinding sequence, allowing systematic improvement of surface finish while maintaining productivity through automated multi-stage processing

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The apparatus dynamically adjusts grinding parameters including rotation speed of grinding stones, feed rate, and pressure application based on the grinding stage and workpiece material. This dynamic control enables consistent surface roughness across different grinding zones while maintaining high productivity

Inventive Principle:

Principle #15Dynamics

2Manufacturing precision

If hand grinding by human is used, then surface roughness control is improved, but productivity decreases

Engineering Contradiction:

Improvesurface roughness controlVSAvoidgrinding speed

Core Design Contradiction:

Manufacturing precisionVSProductivity

Solution Approach 1:

The apparatus incorporates sensors and control systems that automatically monitor and adjust grinding parameters without human intervention. The system self-regulates pressure, speed, and feed rate to maintain optimal surface roughness, replacing manual sensory perception with automated feedback control

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

Manual human operation is replaced with an automated mechanical control system that uses motors, sensors, and programmable logic to control the grinding process. This substitution eliminates variability in human operation while maintaining precision through electronic control

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Device complexity

If single-stage grinding is used, then device complexity is reduced, but surface roughness consistency deteriorates

Engineering Contradiction:

Improvegrinding process simplicityVSAvoidsurface roughness consistency

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The apparatus changes multiple parameters simultaneously across different grinding stages including stone grit size, rotation speed, feed rate, and pressure. This coordinated parameter change enables consistent surface roughness through optimized process conditions at each stage

Inventive Principle:

Principle #35Parameter changes

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 apparatus effectively reduces surface roughness variations, ensuring consistent grinding results on large disk-shaped workpieces by controlling rotational speed, contact pressure, and movement patterns, thereby improving product quality.

Implementation Method 1

a rotation unit (22) that grinds a surface of the workpiece (P) by rotation

Methodology Applied

Scientific EffectFriction: Friction

Implementation Method 2

holding unit (30) that holds the grinder (20) such that a rotation axis (C2) of the rotation unit (22) forms an angle

Methodology Applied

Scientific EffectMechanical Force: Mechanical Force

Data Source

PatentUS20260008153A1Grinding processing apparatus

Publication Date: 2026.01.08 NITERRA MATERIALS CO LTD

AI summary

A grinding processing apparatus according to an embodiment includes: a rotary table configured to be rotatable and to hold a workpiece; a grinder including a rotation unit and configured to grind a surface of the workpiece held by the rotary table by rotation of the rotation unit; a holding unit configured to hold the grinder such that a rotation axis of the rotation unit forms an angle exceeding 0 degrees and being 60 degrees or less to a vertical axis; a horizontal movement slider configured to slide the holding unit in a horizontal direction in a state where a tip tool of the rotation unit is in contact with the workpiece; and a controller configured to control rotation of the rotary table and the rotation unit, and to control the grinder to linearly slide between a center side and an outer peripheral side of the workpiece.