Cutting-Off Tool Breaker Geometry for Swarf Evacuation
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Solution Overview
Problem
Existing cutting-off processing tools often damage the processed surface of workpieces during the cutting process due to swarf contact.
Innovation Solution
The cutting-off processing tool design features a cutting edge with a first and second cutting edge portion, where the second front end is lower than the first, facilitating swarf evacuation parallel to the cutting direction, and varying widths and inclinations of breaker projection faces to enhance rigidity and reduce damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional cutting edge design is used, then the cutting process can be performed, but the processed surface of the workpiece is damaged by swarf contact
Solution Approach 1:
The invention introduces a height dimension difference between the first and second breaker projection faces, creating a three-dimensional swarf evacuation path. The first breaker projection face is positioned higher than the second, forming a gradient that guides swarf away from the processed surface in the height direction, preventing contact damage.
Solution Approach 2:
The cutting edge is designed with asymmetric breaker projection faces where the first breaker projection face has different height and width dimensions compared to the second breaker projection face. This asymmetric configuration creates a directional swarf flow path that asymmetrically directs debris away from the critical processed surface area.
2Productivity
If the first breaker projection face is positioned ahead of the second, then swarf evacuation is improved, but the structural complexity increases
Solution Approach 1:
The cutting edge is segmented into distinct functional zones: the first breaker projection face for primary swarf deflection, the second breaker projection face for secondary evacuation, and the rake face for chip formation. This segmentation allows each zone to perform its specific function efficiently, improving overall swarf evacuation while maintaining a modular structure that is relatively simple to manufacture.
Data Source
AI summary
The upper surface includes a first breaker projection face extending along the first side surface, a second breaker projection face extending along the second side surface, and a rake face located between the first breaker projection face and the second breaker projection face in top view. In a direction from the rear surface to the front surface, a first front end of the first breaker projection face is located ahead of a second front end of the second breaker projection face. A cutting edge has a first cutting edge portion and a second cutting edge portion. In a direction perpendicular to the reference surface, the second breaker projection face is lower than the first breaker projection face, and a boundary between the first cutting edge portion and the second cutting edge portion is lower than the second breaker projection face.