Asymmetric Cutting Insert Structure for Stable Grooving Fixation
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Solution Overview
Problem
Existing cutting tools for grooving processes face challenges in stabilizing the insert during the cutting process, leading to potential instability and increased risk of cracks around the through hole due to uneven load distribution and excessive stress on the fixing tool.
Innovation Solution
The cutting insert design features a first concave part located away from the imaginary line connecting the cutting edge and the central axis of the through hole, allowing for stable fixation by distributing the load across the holder's periphery and reducing the likelihood of cracks, while also ensuring durability through strategic surface configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the concave part is located on the imaginary line connecting the cutting edge and the central axis of the through hole, then the insert can be constrained to the holder, but the load is concentrated causing instability and crack risk
Solution Approach 1:
The patent positions the concave part asymmetrically relative to the imaginary line connecting the cutting edge and the through hole center. Specifically, the concave part is located at a position where its projection on the upper surface does not coincide with the imaginary line, creating an asymmetric load distribution that prevents concentration of forces at critical points, thereby enhancing both insert stability and holder strength.
Solution Approach 2:
The patent creates a localized stress distribution pattern by positioning the concave part at a specific offset location. This local quality change ensures that the principal force is distributed to specific regions of the holder that can better withstand the loads, preventing crack initiation at the through hole perimeter while maintaining effective constraint of the insert.
2Duration of action of stationary object
If the concave part is positioned to distribute load evenly, then holder durability improves, but insert constraint stability may be compromised
Solution Approach 1:
The asymmetric positioning of the concave part creates an optimized balance between load distribution and constraint stability. The specific offset location ensures that while the load is distributed away from the through hole to prevent cracks, the geometric relationship between the concave part and holder convex part maintains sufficient constraint forces to prevent insert instability during cutting operations.
Data Source
AI summary
An insert may include a main body. The main body may include a first surface, a second surface, a side surface, a first cutting edge and a through hole. The side surface may be located between the first surface and the second surface. The first cutting edge may be located on at least a part of a ridge line where a first side surface of the side surface intersects with a second side surface adjacent to the first side surface. The through hole may open into the first surface. The main body may further include a first concave part located from the first surface to the side surface. The first concave part may be located away from an imaginary straight line connecting the first cutting edge and a center of the through hole in a front view of the first surface.