Adhesive Holding Element for Precise Tool Guiding Without Surface Damage

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Solution Overview

Problem

Existing methods for supporting and guiding machine tools or workpieces are inadequate for precise machining, often causing damage to the workpiece and are difficult to handle due to the use of nails or screws for attachment.

Innovation Solution

A holding element with a detachable retaining element that uses a combination of adhesive and positive locking mechanisms, allowing for secure attachment to the workpiece without leaving residue and enabling precise positioning of machine tools.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If nails or screws are used to fasten the guide rail to the workpiece, then the guide rail achieves firm attachment, but the workpiece surface is damaged

Engineering Contradiction:
Improveattachment strengthVSAvoidworkpiece surface damage
Core Design Contradiction:
StrengthVSObject-affected harmful factors

Solution Approach 1:

The patent replaces the mechanical fastening system (nails or screws) with an adhesive bonding system. The adhesive agent is applied to the mounting surface of the support body, creating a chemical bond instead of a mechanical one, thereby avoiding penetration and damage to the workpiece surface while maintaining firm attachment.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the bonding mechanism from mechanical interlocking (nails/screws) to chemical adhesion. By using an adhesive agent with appropriate bonding properties, the attachment method transitions to a non-invasive approach that preserves the workpiece surface integrity while achieving the required attachment strength.

Inventive Principle:
Principle #35Parameter changes

2Manufacturing precision

If the guide rail is screwed to the substrate for precise workpiece machining, then positioning precision is improved, but handling becomes difficult due to fixed fastening points

Engineering Contradiction:
Improvepositioning precisionVSAvoidhandling ease
Core Design Contradiction:
Manufacturing precisionVSEase of operation

Solution Approach 1:

The patent segments the fastening function from the support body by using a separate adhesive agent. This allows the support body to be positioned and adjusted freely during handling, and the adhesive is applied only when final positioning is achieved, combining ease of handling with positioning precision.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent enables preliminary positioning and adjustment of the support body before the adhesive sets. The adhesive agent provides initial bonding that allows for fine-tuning of the position, and once positioned correctly, the adhesive cures to provide permanent fixation, thus achieving both ease of handling during setup and precision in the final position.

Inventive Principle:
Principle #10Preliminary action

3Object-affected harmful factors

If adhesive is used to attach the support body to the workpiece, then the workpiece surface is protected from damage, but the attachment firmness is insufficient for precise machining

Engineering Contradiction:
Improveworkpiece surface protectionVSAvoidattachment firmness
Core Design Contradiction:
Object-affected harmful factorsVSStrength

Solution Approach 1:

The patent optimizes the adhesive agent parameters to achieve both surface protection and firm attachment. By selecting an adhesive with appropriate viscosity, bonding strength, and curing properties, the system achieves sufficient attachment firmness for precise machining while maintaining the benefit of non-invasive bonding that protects the workpiece surface.

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 solution provides a firm hold on the workpiece, facilitating precise machining while avoiding damage and simplifying handling by allowing easy replacement of worn or non-adhesive retaining elements.

Implementation Method 1

an adhesive agent (70) having an adhesive surface (71) suitable for releasable adhesion to the working surface (H)

Methodology Applied
Scientific EffectAdhesion: Adhesive

Data Source

PatentEP3823788B1Holding element for a supporting and/or guiding device
Publication Date: 2026.03.25 FESTOOL GMBH
  • EP3823788B1 patent drawingFigure 1~8
  • EP3823788B1 patent drawingFigure 9~13
  • EP3823788B1 patent drawingFigure 14~18

AI summary

The invention relates to a holding element (60) for a device for supporting and/or guiding a machine tool (20) or a workpiece (W). The device has a contact body (40) with a contact surface (42) for placing on a working surface (H) of a workpiece (W) or a wall. The holding element (60) has an adhesive (70) for adhering to the working surface (H) and a securing means for a releasable hold on the contact body (40), wherein the securing means comprises at least one formfitting contour (90) for a formfitting hold on a holding element receiving area (55) of the contact body (40).