Chamfering Tool Wing Spacing for Chip Evacuation

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Solution Overview

Problem

Existing chamfering tools face challenges in chip removal and safety due to exposed cutting bodies, which can lead to injury and clogging, and are often material-intensive and costly to produce.

Innovation Solution

A calibrating and chamfering tool with a wing partially spaced from the base plate for chip removal and a protective sleeve to prevent direct contact, featuring a milling body design with a centering body and drive pin, and a separate plastic protective sleeve for enhanced safety and reduced manufacturing costs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the cutting body is exposed to ensure chip removal, then chip evacuation is improved, but safety deteriorates due to risk of accidental contact

Engineering Contradiction:

Improvechip removalVSAvoidsafety risk

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The tool is segmented into functional zones: the exposed cutting body for chip removal and the separate protective sleeve for safety. The protective sleeve is divided into regions with different radial distances, allowing chip evacuation paths while maintaining safety barriers where needed.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The protective sleeve acts as an intermediary element between the operator and the exposed cutting body. It provides safety protection while allowing chip removal through strategically positioned gaps and radial distance configurations.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Object-affected harmful factors

If the cutting body is surrounded by protective structure, then safety is improved, but chip removal capability deteriorates

Engineering Contradiction:

ImprovesafetyVSAvoidchip removal

Core Design Contradiction:

Object-affected harmful factorsVSProductivity

Solution Approach 1:

The protective sleeve has non-uniform structure with varying radial distances at different angular positions. Some regions have larger radial distances to facilitate chip removal, while others maintain closer protection. This local variation in protective quality allows simultaneous achievement of safety and chip evacuation.

Inventive Principle:

Principle #3Local quality

3Productivity

If recesses are ground into the milling body for chip removal, then chip evacuation is improved, but manufacturing cost and complexity increase

Engineering Contradiction:

Improvechip removalVSAvoidmanufacturing cost

Core Design Contradiction:

ProductivityVSEase of manufacture

Solution Approach 1:

Instead of modifying the milling body by grinding recesses (which is costly and complex), the chip removal function is extracted and achieved through the protective sleeve's structural design. The sleeve's radial distance variations and gap configurations provide chip evacuation paths without requiring complex modifications to the milling body itself.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentEP2497589B1Calibrating and chamfering tool for tubular workpieces

Publication Date: 2013.11.20 PROPRESS

Figure 1
Figure 2a
Figure 2b

AI summary

The calibrating- and chamfering tool (1) has a centering body (2), a wing (3,3 '), on which a cutting edge is formed and a surface section (7) for a radially protruding base plate. The wing is sectionally spaced from the surface section for the base plate in the axial direction (x) so that a free space (11,11') is provided for the removal of chips.