Rhombus Cutting Insert With Segmented Engagement For Clamping Stability
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Solution Overview
Problem
Existing cutting tools face challenges in evenly distributing clamping force and providing stable three-point clamping, as well as resisting lateral cutting force components during metal cutting processes, particularly in turning operations.
Innovation Solution
A generally rhombus-shaped indexable cutting insert with alternating obtuse and acute corner surfaces, featuring a central axis for indexability and engagement surfaces with primary and secondary elements, ensures even clamping force distribution and resistance to lateral forces through a three-point clamping configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional cutting inserts are used with simple engagement configurations, then the device complexity is low, but the clamping force distribution is uneven and lateral cutting force resistance is insufficient
Solution Approach 1:
The engagement configuration is segmented into multiple discrete elements: primary engagement elements (protrusions and recesses) for basic positioning, and secondary engagement elements (additional protrusions and recesses) for enhanced stability. This segmentation allows each element to perform a specific function in the clamping and force resistance system, achieving reliable three-point clamping while maintaining manufacturability through modular design.
2Strength
If the cutting insert uses a rhombus shape with alternating corner surfaces, then the lateral cutting force resistance is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The cutting insert employs a rhombus shape with alternating obtuse and acute corner surfaces, creating an asymmetric geometry that provides superior resistance to lateral cutting forces. The alternating pattern of corner surfaces with different angles optimizes the distribution of lateral forces during cutting operations, enhancing the insert's strength and stability while maintaining manufacturability through standard forming processes.
Data Source
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AI summary
A rhombus-shaped cutting insert has opposing upper and lower surfaces, and a peripheral side surface extending there between having alternating obtuse and acute corner surfaces separated by four relief surfaces. The cutting insert is removably secured in an insert receiving pocket of a tool holder and indexable about a central axis. A nose cutting edge is formed at the intersection of one of the upper and lower surfaces with each of the two acute corner surfaces. One of the upper and lower surfaces has an engagement surface having a single primary and four secondary engagement elements. The primary and secondary engagement elements or portions thereof, exhibit mirror symmetry about primary and secondary engagement planes. The primary engagement plane contains the central axis and intersects each nose cutting edge, and each secondary engagement plane does not contain the central axis and forms an acute engagement angle with the primary engagement plane.