Variable-Width Groove Cutting Insert for Chatter Suppression
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Solution Overview
Problem
Conventional cutting inserts with grooves (nicks) have lower resistance during cutting, leading to inadequate chatter suppression, especially under severe cutting conditions, necessitating improved chatter suppression effects for enhanced productivity.
Innovation Solution
A cutting insert design featuring a peripheral side surface with grooves that extend between opposing end surfaces, where the groove width varies, with a linear part and a width varying part, and differing opening widths on each end surface, providing enhanced cutting edge configurations and rotational symmetry for improved cutting performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional grooves with constant width are used, then the structure is simple, but the chatter suppression effect is insufficient under severe cutting conditions
Solution Approach 1:
The groove width is made non-uniform along its length, with different sections having different widths. Specifically, the groove includes a first section with width W1, a second section with width W2, and a third section with width W3, where at least two of these widths are different. This local variation in groove geometry creates different cutting resistances at different positions, effectively suppressing chatter vibrations while maintaining overall structural simplicity.
2Productivity
If cutting conditions are intensified to improve productivity, then productivity increases, but chatter vibrations worsen
Solution Approach 1:
The non-uniform groove structure creates periodic variations in cutting resistance as the cutting edge passes through different groove sections. This periodic variation in resistance disrupts the periodic nature of chatter vibrations, effectively suppressing chatter even under intensified cutting conditions that aim to improve productivity.
Data Source
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AI summary
In a cutting insert 10 according to the present invention, first cutting edges 21 and second cutting edges 31 are respectively formed in a first end surface 20 and a second end surface 30 which are opposed to each other; at least one groove 41 is formed in a peripheral side surface 40 which connects the first end surface 20 and the second end surface 30; and, while one end of the groove 41 reaches the first end surface 20, another end thereof reaches the second end surface 30, and an opening width in the first end surface 20 is different from an opening width in the second end surface 30.