Cutting Insert Lower Groove Geometry for Load Distribution
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Solution Overview
Problem
Cutting inserts used in turning processes face durability issues due to uneven wedge angles, leading to positional deviations and reduced longevity under cutting loads.
Innovation Solution
A cutting insert design featuring a lower surface with a V-shaped groove divided into regions with varying wedge angles, where the smallest angle is positioned between larger angles to distribute cutting loads effectively, enhancing durability and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the wedge angle in the second surface component is made smaller to improve cutting performance, then cutting load transmission is improved, but durability of the cutting insert deteriorates
Solution Approach 1:
The lower surface is divided into multiple surface components (first surface component and second surface component) with different wedge angles. The first surface component has a larger wedge angle for durability, while the second surface component has a smaller wedge angle for cutting performance, allowing both requirements to be satisfied simultaneously in different regions.
Solution Approach 2:
Different regions of the lower surface are assigned different wedge angles according to their specific functional requirements. The region closer to the front end surface receives larger wedge angles for durability, while the region closer to the rear end surface receives smaller wedge angles for optimal cutting load transmission.
2Reliability
If the wedge angle is increased to improve durability, then insert longevity is improved, but cutting load transmission deteriorates
Solution Approach 1:
The lower surface is segmented into multiple surface components with different wedge angles. This segmentation allows the first surface component to have larger wedge angles for durability while the second surface component has smaller wedge angles for cutting load transmission, resolving the contradiction between these two requirements.
Solution Approach 2:
Each surface component is assigned a locally optimized wedge angle based on its position and function. The first surface component (closer to front end) uses larger wedge angles for durability, while the second surface component (closer to rear end) uses smaller wedge angles for cutting performance.
Data Source
AI summary
A cutting insert may include an upper surface, a lower surface, a front lateral surface and a rear lateral surface. The upper surface may include a first upper cutting edge and an upper constraining surface. The lower surface may include a lower constraining surface. The lower constraining surface may include a lower groove. The lower groove may include a first region, a second region and a third region. The first region may be located on a side opposite to the upper constraining surface. A wedge angle of the first region may be a first angle, a wedge angle of the second region may be a second angle, and a wedge angle of the third region may be a third angle. The first angle may be smaller than each of the second angle and the third angle.