Cutting Tool Recess Geometry for Flush Edge Banding

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Solution Overview

Problem

Existing methods for flush cutting edge bands, particularly thin pre-coated edge bands, require skill and can damage surfaces due to the risk of splitting or surface scratches, especially when using chisels or cutting knives, and are not user-friendly for inexperienced individuals.

Innovation Solution

A cutting tool with a recess open in the direction of advancement, featuring parallel side surfaces for guiding and stopping the edge band, and a cutting surface at an angle to prevent splintering, combined with a chip guide for smooth removal of cut sections, allowing for intuitive operation without additional guides or adjustments.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If a chisel is used to cut the edge banding flush, then the cutting edge can be sharp for clean cuts, but the workpiece surface is at risk of damage from nicks and scratches

Engineering Contradiction:

Improvecutting precisionVSAvoidsurface damage risk

Core Design Contradiction:

Manufacturing precisionVSObject-affected harmful factors

Solution Approach 1:

The tool separates the cutting function from the support function. The support surface provides stability and protection, while the cutting edge performs the trimming action, preventing the workpiece surface from bearing the full load during cutting

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The tool design incorporates a support surface that contacts the workpiece before cutting begins, providing a cushioning effect that prevents direct transmission of cutting forces to the workpiece surface, thereby preventing damage

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

2Productivity

If a chisel is used with long-fiber solid wood edge banding, then cutting can be performed, but the wood grain may split due to wedge effect

Engineering Contradiction:

Improvecutting capabilityVSAvoidwood grain splitting

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

Instead of pushing the cutting edge into the material from below (which creates wedge effect), the tool supports the workpiece from below and cuts from above, inverting the traditional cutting direction to eliminate the splitting problem

Inventive Principle:

Principle #13The other way round (Inversion)

3Object-affected harmful factors

If a file or metal piece is used to push off the edge banding, then splitting is prevented, but positioning the tool requires practice and routine

Engineering Contradiction:

Improvesplitting preventionVSAvoidtool positioning difficulty

Core Design Contradiction:

Object-affected harmful factorsVSEase of operation

Solution Approach 1:

The tool's support surface automatically positions itself on the workpiece surface during operation, eliminating the need for the user to manually position and align the tool. The geometry of the support surface guides the tool into the correct position

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The support surface has a larger contact area that can be visually identified, helping users easily locate and position the tool on the workpiece without requiring extensive practice

Inventive Principle:

Principle #32Color changes

4Manufacturing precision

If a cutting blade is used for flush cutting, then clean cuts can be achieved, but the blade dulls quickly and needs frequent resharpening

Engineering Contradiction:

Improvecut qualityVSAvoidblade service life

Core Design Contradiction:

Manufacturing precisionVSDuration of action of stationary object

Solution Approach 1:

The tool uses a support surface with optimized geometric parameters (angle, area, position) that change the cutting conditions to reduce blade wear while maintaining cut quality, allowing the blade to last longer

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentEP3050686B1Method of use of a cutting tool with a metal body for flush cutting fixed edges strips protruding from the front sides of workpiece plates

Publication Date: 2019.10.16 REINES WOLFGANG

Figure 1~2
Figure 3~4

AI summary

The invention relates to a cutting tool (1) with a metal body (2) for flush-cutting edge banding (15) attached to the end faces of workpiece panels (14), wherein the edge banding (15) is manually displaceable with a section (19) on the workpiece panel (14) and wherein the metal body (2) has a recess with cutting edges (7, 8) in the area of its support surfaces (9, 10) on the workpiece panel (14). To enable the cutting tool to be used quickly and without detailed instructions for flush-cutting protruding edge banding made of melamine, plastic, and solid wood attached to workpiece panels, without damaging the edge banding, the invention provides that the recess is open in the feed direction (12) of the metal body (2) and has parallel side surfaces (3, 6), at least one of which (3) serves as a stop and guide surface for the outside of the section (19) of the edge banding (15).that immediately behind the side surface (3) a cutting surface (4) with two cutting edges (7, 8) is arranged in the area of the support planes (9, 10) of the workpiece plate (14), that the cutting edges (7, 8) and the cutting surface (4) are at right angles to the support planes (9, 10) of the metal body (2) and bluntly repel the section (19) of the edge band (15), and that the repelled section (19) of the edge band (15) can be fed to a chip guide (5, 6) arranged behind the cutting surface (4).