Helical Nick Cutting Edge Structure for Vibration-Suppressed Machining
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Solution Overview
Problem
Conventional cutting tools face limitations in suppressing workpiece vibration during cutting operations.
Innovation Solution
A cutting tool design featuring at least two main cutting edge portions with helically disposed first and second nick portions having opposite helix angles, differing widths and depths, and a specific relationship to suppress vibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional cutting tools with single helix angle cutting edges are used, then the cutting structure is simple, but workpiece vibration cannot be effectively suppressed
Solution Approach 1:
The cutting edge is segmented into multiple distinct portions: main cutting edge portions with first helix angle, first nick portions with second helix angle, and second nick portions with third helix angle. This segmentation allows each portion to contribute differently to cutting and vibration suppression, resolving the contradiction between simple structure and vibration control effectiveness.
Solution Approach 2:
The cutting tool employs asymmetric helix angle configuration where different cutting edge portions have different helix angles (first, second, and third helix angles). This asymmetry disrupts regular vibration patterns and prevents resonant frequencies, effectively suppressing workpiece vibration while maintaining a manageable structural complexity through systematic design.
2Object-affected harmful factors
If multiple nick portions with different helix angles are introduced, then workpiece vibration is suppressed, but manufacturing complexity increases
Solution Approach 1:
The nick portions are pre-formed on the cutting edges during manufacturing with specific helix angles and geometries. This preliminary action ensures that the vibration-suppressing features are already in place before the cutting operation, eliminating the need for complex real-time adjustments or post-processing, thereby reducing overall manufacturing complexity.
Solution Approach 2:
The invention utilizes parameter changes in helix angles (first, second, and third distinct helix angles) and nick portion geometries (different widths and depths) to achieve vibration suppression. By optimizing these parameters during the design and manufacturing stage, the cutting tool achieves superior vibration control without requiring overly complex manufacturing processes.
3Manufacturing precision
If nick portions with varying widths and depths are used, then cutting performance and vibration suppression are improved, but precision requirements increase
Solution Approach 1:
The nick portions are designed with varying widths and depths to create dynamic cutting characteristics that adapt to different cutting conditions. This dynamic design allows the cutting edge to interact with the workpiece in a controlled manner, improving cut surface quality while the systematic variation in dimensions provides clear manufacturing guidelines that prevent excessive complexity in geometry control.
Data Source
AI summary
A cutting tool according to one aspect of the present disclosure includes a shaft portion and cutting edge portions. The main cutting edge portions have a main cutting edge. 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 first and second nick portions. The main cutting edge portions are formed in the region. 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.