Threaded Bar Deburrer With Conical Guide

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Solution Overview

Problem

Existing deburring devices struggle to achieve uniform deburring of rod-shaped elements, particularly threaded rods, with large diameters, often resulting in complex manual processes and potential damage to threads due to the lack of effective guidance and protection during the deburring process.

Innovation Solution

A deburring device with a conical guide section and a rounded insertion section allows for wobbling rotation of the rod-shaped element, ensuring uniform deburring and protecting the thread, even at maximum diameter, by incorporating a conical guide section with a specific angle of inclination and a large opening angle for the deburring section, and a holding device attachable to a drill or electric screwdriver.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If a conventional deburring device with a straight guide section is used, then the device structure is simple, but uniform deburring cannot be achieved with large diameter rod-shaped elements

Engineering Contradiction:

Improveuniform deburringVSAvoidguide section structure

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The guide section is designed with a conical shape instead of a straight cylindrical form. This curvature allows the rod-shaped element to perform a controlled wobbling rotation during deburring, ensuring that the entire circumferential surface contacts the deburring means uniformly, thereby achieving consistent deburring results on large diameter elements.

Inventive Principle:

Principle #14Spheroidality (Curvature)

Solution Approach 2:

The conical guide section enables dynamic wobbling motion of the rod-shaped element during the deburring process. This dynamic movement ensures continuous contact between the deburring means and the entire circumferential surface of the rod, preventing stationary contact points that would cause uneven deburring.

Inventive Principle:

Principle #15Dynamics

2Ease of operation

If manual filing is used for deburring, then some level of deburring can be achieved, but the process is complex and requires manual skill

Engineering Contradiction:

Improvedeburring operationVSAvoiddeburring process

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The device enables self-service deburring by allowing the rod-shaped element to automatically perform wobbling rotation within the conical guide section during machine operation. This self-adjusting mechanism eliminates the need for manual skill or complex manual filing operations, as the geometry itself ensures uniform contact and deburring.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The invention replaces complex manual mechanical filing operations with a simpler machine-based system. The conical guide section combined with rotational driving means substitutes for skilled manual manipulation, transforming a skill-dependent manual process into an automated mechanical operation.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Manufacturing precision

If the guide section diameter matches the rod diameter closely, then guidance precision is high, but the rod cannot perform wobbling rotation for uniform deburring

Engineering Contradiction:

Improvedeburring uniformityVSAvoidguidance precision

Core Design Contradiction:

Manufacturing precisionVSMeasurement precision

Solution Approach 1:

The conical guide section provides a gradually changing diameter that maintains close guidance while allowing controlled wobbling motion. The tapered geometry ensures the rod remains centrally positioned while permitting the necessary rotational movement for uniform deburring contact.

Inventive Principle:

Principle #14Spheroidality (Curvature)

4Object-affected harmful factors

If a large opening angle deburring section is used, then thread protection is improved, but deburring effectiveness on radial burrs may be reduced

Engineering Contradiction:

Improvethread damageVSAvoidburr removal efficiency

Core Design Contradiction:

Object-affected harmful factorsVSProductivity

Solution Approach 1:

The combination of conical guide section and large opening angle deburring section creates dynamic wobbling rotation that ensures the deburring means contacts the entire circumferential surface. This dynamic contact pattern allows effective burr removal while the large opening angle prevents excessive radial forces that could damage threads.

Inventive Principle:

Principle #15Dynamics

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 device ensures uniform and symmetrical deburring results, protecting the thread and preventing radial damage, facilitating easy insertion and effective removal of burrs without manual skill requirements, even with large diameters.

Implementation Method 1

The conical guide section allows a wobbling rotation of the rod-shaped element, even if the diameter of the rod-shaped element essentially corresponds to the maximum diameter of the deburring section on the guide section.

Methodology Applied

Scientific EffectWobbling rotation:

Data Source

PatentEP2532458B1Threaded bar deburrer

Publication Date: 2017.03.29 HILTI AG

AI summary

The burr removal apparatus (1) has a rotational axis formed by a base body (2) with two opposite-lying ends (3,4). A receptacle (5) is formed at one end of the base body for a rod-shaped element. The receptacle has a deburring portion, where a guide portion is formed between the deburring portion and the former end of the base body. The guide portion is formed in a conical manner, particularly in a cone-shaped manner. An independent claim is also included for a method for deburring a rod-shaped element.