Asymmetric Rotary Cutting Tool Layout for Feed Mark Reduction
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Solution Overview
Problem
Rotary cutting tools in existing technologies often generate feed marks on cut surfaces and suffer from deteriorated circularity during processing.
Innovation Solution
A rotary cutting tool design featuring three to five cutting blades arranged at unequal intervals on the circumference, with specific rotation angles between each blade, and a coolant system to minimize cutting resistance and improve surface quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If equal interval blade arrangement is used, then manufacturing is simple, but feed marks are generated and circularity deteriorates
Solution Approach 1:
The patent applies asymmetry by arranging five cutting blades at unequal angular intervals (60°, 75°, 60°, 75°, 90°) around the rotational axis instead of equal intervals. This asymmetric distribution prevents periodic contact with the workpiece, eliminating feed marks and improving circularity while maintaining manufacturing feasibility through precise angular positioning.
2Ease of manufacture
If equal interval blade arrangement is used, then manufacturing is simple, but feed marks are generated on cut surface
Solution Approach 1:
The asymmetric angular arrangement of blades (60°, 75°, 60°, 75°, 90°) ensures that successive blades contact the workpiece at different angular positions, preventing the formation of periodic feed marks on the cut surface while remaining manufacturable through precise angular positioning during assembly.
3Manufacturing precision
If unequal interval blade arrangement is used, then circularity is improved, but device complexity increases
Solution Approach 1:
The patent implements a moderately complex asymmetric arrangement with five blades at specific angles (60°, 75°, 60°, 75°, 90°) that improves circularity while avoiding excessive complexity by using a limited number of discrete angular positions that can be precisely set during manufacturing and assembly.
Data Source
AI summary
A rotary cutting tool includes a first cutting blade, a second cutting blade, a third cutting blade, a fourth cutting blade, and a fifth cutting blade on a circumference, in which a rotation angle from the first cutting blade to the second cutting blade is 60±1°, a rotation angle from the second cutting blade to the third cutting blade is 75±1°, a rotation angle from the third cutting blade to the fourth cutting blade is 60±1°, a rotation angle from the fourth cutting blade to the fifth cutting blade is 75±1°, and a rotation angle from the fifth cutting blade to the first cutting blade is 90±1°.