Helical Nicked Cutting Tool for Workpiece Vibration Suppression
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Solution Overview
Problem
Conventional cutting tools are limited in suppressing workpiece vibration during cutting, which affects the quality of the cut surface and tool performance.
Innovation Solution
A cutting tool design featuring a shaft with helically disposed main cutting edge portions, including first and second nick portions with opposite helix angles, varying widths and depths, and a diamond coating to enhance strength and tool life, effectively reducing vibration and improving surface finish.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional cutting tools with uniform nick portions are used, then the structure is simple, but workpiece vibration is not sufficiently suppressed
Solution Approach 1:
The patent applies asymmetry by configuring nick portions with different widths and/or depths at different positions along the cutting edge. Specifically, the nick portions have varying dimensions (first nick portion with width W1 and depth D1, second nick portion with width W2 and depth D2 where W1≠W2 and/or D1≠D2). This asymmetric configuration creates varied cutting resistance patterns that effectively suppress workpiece vibration during cutting operations.
Solution Approach 2:
The patent applies local quality by making different sections of the cutting edge have different nick characteristics. The nick portions are selectively positioned at specific locations along the cutting edge with locally optimized widths and depths. This allows each local region to have tailored cutting properties, improving overall vibration suppression while maintaining structural feasibility.
2Object-affected harmful factors
If nick portions with varying widths and depths are implemented, then workpiece vibration is suppressed, but manufacturing complexity increases
Solution Approach 1:
The patent applies parameter changes by systematically varying the dimensional parameters (width and depth) of nick portions along the cutting edge. The nick portions have controlled variations in width (W1, W2, ...) and depth (D1, D2, ...) within specific ranges. This parameter variation approach allows vibration suppression while maintaining manufacturability through standardized fabrication processes with controlled tolerances.
Data Source
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AI summary
A cutting tool according to one aspect of the present disclosure includes a shaft portion and two or more main cutting edge portions. The shaft portion extends along a central axis. The shaft portion has an outer peripheral surface. The outer peripheral surface surrounds the central axis. The two or more main cutting edge portions are helically disposed on the outer peripheral surface. The main cutting edge portions have a main cutting edge. The main cutting edge has a helix angle. In a section within ±30% of a blade length of a region from a center of the region in a direction along the central axis, the main cutting edge portions have at least one first nick portion and at least one second nick portion. The main cutting edge portions are formed in the region. The first nick portion and the second nick portion have helix angles in an opposite direction with respect to the helix angle. The relationship between the first nick portion and the second nick portion satisfies at least one of a first condition and a second condition. The first condition is that a width of the first nick portion is different from a width of the second nick portion. The second condition is that a depth of the first nick portion is different from a depth of the second nick portion.