Deburring Tool Rocker Mechanism for Precise Bore Chamfering

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Solution Overview

Problem

Existing deburring tools face issues with complexity, unreliability, and imprecision in adjusting and resetting cutting blades, leading to potential blade loss and inconsistent chamfer sizes due to friction and vibration during machining processes.

Innovation Solution

A deburring tool with a simplified and reliable mechanism for adjusting and resetting cutting blades, using a spring-loaded rocker system with a torsion spring and a new adjustment mechanism that ensures reproducible and precise chamfer size control, allowing easy blade replacement and secure engagement.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If an eccentric piece is used to retract the rocker for blade changes, then blade replacement is enabled, but the mechanism becomes complex and costly

Engineering Contradiction:

Improveblade replacement capabilityVSAvoidmechanism complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The invention extracts the complex eccentric piece mechanism from the system and replaces it with a simple axial displacement of the knife housing. The rocker is directly retracted axially without requiring an eccentric conversion mechanism, thereby eliminating unnecessary complexity while maintaining blade replacement capability

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

Instead of using an eccentric piece to convert axial motion into radial motion for rocker retraction, the invention inverts the approach by directly displacing the knife housing axially, which automatically causes the rocker to disengage and retract without complex mechanism

Inventive Principle:

Principle #13The other way round (Inversion)

2Adaptability or versatility

If the rocker is moved axially backwards against the torsion spring, then blade changes are enabled, but frictional forces prevent reliable resetting

Engineering Contradiction:

Improveblade change functionVSAvoidrocker resetting reliability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The invention segments the blade change process into distinct phases: axial displacement of the knife housing for blade removal, and automatic spring-driven return for resetting. This separation ensures that the torsion spring only needs to overcome minimal friction during return, improving reliability

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The torsion spring is pre-loaded to provide sufficient resetting force before the blade change operation begins. This beforehand energy storage ensures that the rocker can reliably overcome frictional forces during the return stroke, maintaining consistent resetting behavior

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Adaptability or versatility

If an adjusting screw is used to control radial position of the rocker, then chamfer size can be adjusted, but the adjustment becomes imprecise due to vibrations

Engineering Contradiction:

Improvechamfer size adjustabilityVSAvoidadjustment precision

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The invention replaces the adjusting screw mechanism with a direct rotational adjustment of the knife housing relative to the base body. This eliminates the screw-and-thread interface that is susceptible to vibration-induced displacement, providing more stable and precise chamfer size control

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The adjustment function is merged directly into the knife housing rotation mechanism. By rotating the knife housing itself to adjust the radial position of the cutting blades, the system combines the adjustment function with the existing structural component, eliminating separate adjustment mechanisms that could be affected by vibrations

Inventive Principle:

Principle #5Merging (Combining)

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 tool provides simpler, more reliable, and precise deburring operations with consistent chamfer sizes, reducing blade loss and maintaining process reliability by enhancing the rocker's engagement and adjustment mechanism.

Implementation Method 1

a spring-loaded rocker system with a torsion spring

Methodology Applied

Scientific EffectTorsion spring: Torsion Spring

Implementation Method 2

spring-loaded rocker system

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentEP4289537B1Deburring tool for forward and backward deburring of bore edges

Publication Date: 2025.08.06 HEULE WERKZEUG

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Figure 2~3
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AI summary

Deburring tool for deburring bores with a paired arrangement of cutting blades (2, 2a) and a rotating tool holder (1), wherein in a blade recess (20) of a blade housing (3) the cutting blades (2, 2a) are oppositely driven with radially outwardly pointing, conical cutting edges (27, 28) by a rotatable rocker arm (4) arranged in a base body (6) of the tool holder (1) and the rocker arm (4) is rotatably mounted about an axial longitudinal axis in the tool holder (1) and is spring-loaded in the axial direction, wherein for changing the cutting blades (2, 2a) the blade housing (3) is axially displaceable and lockable on the rocker arm (4) and the base body (6).