Rotary Cutting Tool Grooves for Chip Breaking and Surface Precision
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Solution Overview
Problem
Conventional rotary cutting tools face difficulties in effectively cutting off chips, leading to elongated and wide chips that can damage the processed surface and reduce processing precision.
Innovation Solution
The rotary cutting tool incorporates grooves in the rake face of the cutting edge tip, oriented obliquely with respect to the rotation axis, where the front ends of the grooves are positioned at the front cutting edge and the rear ends are inside the outer peripheral cutting edge, ensuring an irregularity of 30 μm or less, facilitating chip cutting and curling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional rotary cutting tools are used, then the tool structure is simple, but the chips are elongated and wide causing surface damage and reduced precision
Solution Approach 1:
The rake face is segmented into multiple zones by providing grooves at different positions and orientations. First grooves are provided at the front cutting edge portion, second grooves at the outer peripheral cutting edge portion, and third grooves in between, creating distinct chip control zones that prevent elongated chip formation and improve processing precision
Solution Approach 2:
Different groove configurations are applied to different regions of the rake face according to local chip formation needs. The front cutting edge portion receives first grooves for initial chip breaking, the outer peripheral portion receives second grooves for chip curling control, and intermediate regions receive third grooves, optimizing chip control locally throughout the tool
2Productivity
If grooves are added to control chips, then chip cutting efficiency improves, but the device complexity increases
Solution Approach 1:
The chip control function is segmented across multiple groove types positioned at different locations. First grooves at the front cutting edge provide initial chip breaking, second grooves at the outer periphery enhance chip curling, and third grooves in intermediate zones refine chip formation, collectively improving chip cutting efficiency through distributed functionality
Solution Approach 2:
The groove system performs multiple functions simultaneously: first grooves break chips at the front edge, second grooves curl chips at the periphery, and third grooves control intermediate chip formation. This multi-functional groove configuration improves chip cutting efficiency while consolidating multiple chip control operations into a single integrated tool structure
Data Source
AI summary
A rotary cutting tool includes a tool body and a cutting edge tip provided at the tool body. At least one first groove is provided in a rake face of the cutting edge tip, the first groove has a portion inclined with respect to a rotation axis, and a front end of the first groove is provided at a front cutting edge. A rear end of the first groove is provided on an inner side with respect to an outer peripheral cutting edge, and an irregularity of the outer peripheral cutting edge is 30 μm or less.