Rotary Grinding Tool with Diametrically Opposite Openings

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Solution Overview

Problem

Conventional grinding tools do not allow the grinder to monitor the grinding result during the process, leading to imprecise results and the need for frequent interruptions to check machining depth, especially when working with composite materials like glass fiber reinforced plastics.

Innovation Solution

A grinding tool with a rotating grinding body featuring diametrically opposite openings on its lateral surface, allowing the grinder to observe the grinding surface through the rotating tool, ensuring continuous monitoring without stopping, and optionally a hollow-cylindrical design for improved air cooling and dust extraction.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If conventional solid grinding wheels are used, then the grinding structure is simple and robust, but the grinder cannot observe the grinding surface during the process

Engineering Contradiction:
Improvevisibility of grinding surfaceVSAvoidgrinding wheel structure
Core Design Contradiction:
Loss of informationVSDevice complexity

Solution Approach 1:

The grinding wheel is segmented by introducing radial slots that divide the wheel structure into sections. These slots create transparent pathways allowing light to pass through the grinding wheel, enabling the grinder to observe the grinding surface during operation while maintaining the overall structural integrity of the wheel.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The grinding wheel incorporates a porous or translucent structure with radial slots that allow optical penetration. This design enables visibility through the grinding wheel without compromising its mechanical strength, as the slots are positioned to allow observation while the grinding peripheral surface remains intact for effective material removal.

Inventive Principle:
Principle #31Porous materials

2Measurement precision

If the grinder interrupts the grinding process to check machining depth, then they can assess the grinding result, but new grinding surfaces are created and precision is reduced

Engineering Contradiction:
Improvegrinding depth controlVSAvoidgrinding process continuity
Core Design Contradiction:
Measurement precisionVSLoss of time

Solution Approach 1:

The radial slots in the grinding wheel enable continuous observation of the grinding surface during the entire grinding process. The grinder can monitor material removal in real-time without interrupting the grinding action, maintaining continuous useful action while achieving precise depth control through visual feedback on the bonding layer shading changes.

Inventive Principle:
Principle #20Continuity of useful action

3Object-affected harmful factors

If conventional grinding wheels without openings are used, then the structural integrity is high, but dust extraction and cooling are insufficient

Engineering Contradiction:
Improvedust removal efficiencyVSAvoidgrinding wheel structural integrity
Core Design Contradiction:
Object-affected harmful factorsVSStrength

Solution Approach 1:

The radial slots segment the grinding wheel structure, creating channels that facilitate dust extraction and air flow. These segmented pathways allow efficient removal of grinding debris and improved cooling without significantly compromising the overall structural integrity, as the slots are positioned to maintain wheel strength while enabling harmful factor removal.

Inventive Principle:
Principle #1Segmentation

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

Enables continuous monitoring of the grinding process, improving precision and reducing interruptions by providing a clear view of the grinding surface and efficient dust removal, even at varying processing depths and lighting conditions.

Implementation Method 1

openings (4a, 4b) passing through the grinding body on sides (6, 7) of the cylindrical surface which are diametrically opposite with respect to the axis of rotation (3) in such a way that the grinder can see through the rotating grinding body during grinding

Methodology Applied
Scientific EffectLight transmission: Light

Data Source

PatentEP2991804B1Rotary grinding tool
Publication Date: 2022.02.23 BAYERISCHE MOTOREN WERKE AG
  • EP2991804B1 patent drawingFigure 1
  • EP2991804B1 patent drawingFigure 2
  • EP2991804B1 patent drawingFigure 3~4

AI summary

The invention relates to a grinding tool (1) having a grinding body (2) rotatable about an axis of rotation (3), wherein at least two openings (4a, 4a) extending through the grinding body (2) are arranged on sides of the lateral face (6) which are diametrically opposite in relation to the axis of rotation (3) , such that during grinding a grinder is able to look through the rotating grinding body (2).