Radially Movable Peeling Tool for Straightness Error Compensation

Solution Overview

Problem

Existing peeling tools struggle to achieve high dimensional accuracy and surface quality on hydraulic cylinders, particularly with hot-rolled pipes that have low dimensional accuracy and significant curvature, due to issues with tool rigidity and poor handling of straightness errors.

Innovation Solution

A peeling tool design featuring a rigid tool head with a knife holder that prevents tilting and allows radial movement, equipped with fixed peeling knives and a counterforce generating element, along with a torque transmission device and adjustable circumferential diameter, to maintain consistent cutting edge position and counteract passive forces, ensuring high surface quality even with low dimensional stability blanks.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a peeling tool with radial movement capability is used on hot-rolled pipes, then the tool can accommodate curvature variations, but dimensional accuracy and surface quality deteriorate due to low tool stiffness

Engineering Contradiction:

Improveability to handle straightness errorsVSAvoiddimensional accuracy

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The knife holder is designed with radial movement capability relative to the tool head, allowing the cutting edge to dynamically adjust its position to follow the tube's curvature variations and straightness errors while maintaining cutting contact

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The tool head diameter is made adjustable to match the nominal inner diameter of the tube, and the knife holder's radial position is variable to compensate for curvature variations, enabling the tool to adapt to different tube geometries while maintaining precision

Inventive Principle:

Principle #35Parameter changes

2Manufacturing precision

If the knife holder is rigidly fixed to prevent tilting, then cutting edge position stability improves, but the tool cannot accommodate straightness errors in the tube

Engineering Contradiction:

Improvecutting edge position stabilityVSAvoidability to follow straightness errors

Core Design Contradiction:

Manufacturing precisionVSAdaptability or versatility

Solution Approach 1:

The knife holder is designed with radial movement capability relative to the tool head, allowing the cutting edge to dynamically adjust its position to follow the tube's curvature variations and straightness errors while maintaining cutting contact

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The tool is segmented into a rigid tool head for stability and a movable knife holder for adaptation, separating the functions of maintaining cutting edge stability and accommodating tube geometry variations

Inventive Principle:

Principle #1Segmentation

3Adaptability or versatility

If peeling knives are made radially movable to accommodate curvature, then adaptability to hot-rolled pipes improves, but tool stiffness in radial direction decreases

Engineering Contradiction:

Improveability to process hot-rolled pipesVSAvoidradial stiffness

Core Design Contradiction:

Adaptability or versatilityVSStrength

Solution Approach 1:

The knife holder is designed with radial movement capability relative to the tool head, allowing the cutting edge to dynamically adjust its position to follow the tube's curvature variations and straightness errors while maintaining cutting contact

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The tool is segmented into a rigid tool head for stability and a movable knife holder for adaptation, separating the functions of maintaining cutting edge stability and accommodating tube geometry variations

Inventive Principle:

Principle #1Segmentation

Data Source

PatentEP2905101B1Peeling tool

Publication Date: 2021.11.03 ECOROLL WERKZEUGTECHN

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Figure 4~5
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AI summary

The invention relates to a peeling tool with a tool head (1), at least one peeling blade (6.1), at least one counterforce generating element (6.2, 6.3, 8.2), by means of which a counterforce (Fg) to a passive force (Fp) applied to the peeling blade can be generated, and a knife holder (4) on which the at least one peeling knife (6.1) and the at least one counterforce generating element (6.2, 6.3, 8.2) are fixed. According to the invention, the knife holder (4) is mounted on the tool head (1) so that it can be moved in the radial direction relative to the tool head (1).