V-Shaped Corner Cutting Insert for Dual Rake Angles
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Solution Overview
Problem
Existing cutting inserts for milling tools lack the ability to efficiently provide both positive and negative axial rake angles, limiting their versatility and surface finish quality in metal cutting operations.
Innovation Solution
A cutting insert design featuring two opposing identical end surfaces, a peripheral surface with V-shapes oriented in opposite directions, and a through hole, allowing for four main cutting edges with positive and four with negative axial rake angles, along with a milling tool configuration that alternates these orientations for enhanced performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a cutting insert is designed with a single orientation, then the structure is simple, but it cannot provide both positive and negative axial rake angles
Solution Approach 1:
The cutting insert employs asymmetric corner geometry where diagonally opposite corners are differentiated into first corners and second corners. The peripheral surface forms V-shaped configurations with different orientations at these corners, enabling the insert to provide both positive and negative axial rake angles when mounted in different orientations. This asymmetric design allows a single insert to replace multiple specialized inserts.
Solution Approach 2:
The cutting insert is designed as a universal component that can function in multiple cutting operations requiring different rake angles. By incorporating V-shaped peripheral surfaces oriented in opposite directions at diagonally opposite corners, the insert can be mounted in different orientations to provide either positive or negative axial rake angles, eliminating the need for separate inserts for different cutting conditions.
2Adaptability or versatility
If multiple cutting inserts are used to provide different rake angles, then the versatility is improved, but the device complexity and number of components increases
Solution Approach 1:
The invention merges the functions of multiple specialized cutting inserts into a single multi-functional insert. By integrating V-shaped peripheral surfaces with opposite orientations at diagonally opposite corners, the insert combines the capabilities of both positive and negative rake angle inserts, reducing the total number of components needed in the tooling system.
Solution Approach 2:
The cutting insert serves as a universal component that can be configured for different cutting operations through orientation changes. The asymmetric corner design with V-shaped surfaces allows the same insert to provide both positive and negative axial rake angles, replacing multiple single-purpose inserts and simplifying inventory management.
3Adaptability or versatility
If the peripheral surface has V-shapes in opposite directions, then both positive and negative rake angles are achieved, but the manufacturing complexity increases
Solution Approach 1:
The peripheral surface is formed with asymmetric V-shaped configurations at diagonally opposite corners, oriented in opposite directions. This asymmetric geometry is achieved through precision machining or forming processes that create the specific corner configurations, enabling the insert to deliver both positive and negative rake angles while maintaining manufacturability through standardized forming techniques.
Data Source
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AI summary
A cutting insert (10) has eight identical main cutting edges (26). Four main cutting edges can operate with a positive axial rake and four can operate with a negative axial rake. The cutting insert has two opposing identical end surfaces (12) and a peripheral surface (14) extending between the end surfaces. The cutting insert is square - shaped in end views. Each end surface has four corners (22), two lowered corners (22) and two raised corners (22). A diagonal line (L) passes through the lowered corners of each end surface. For a given orientation of the cutting insert the peripheral surface has a V- shape in views along the two diagonal lines associated with each end surface, the two V- shapes being identical in form and oriented in opposite directions.