Reversible Cutting Insert Geometry for Axial and Radial Rake Balance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing indexable reversible cutting inserts and tools face limitations in achieving optimal rake angles for efficient metal cutting, particularly in milling operations, as they often require compromise between axial and radial rake relations, leading to suboptimal performance in terms of power consumption and chip removal.
Innovation Solution
The design of an indexable reversible cutting insert with two opposing polygonal end surfaces and a peripheral surface, featuring a 45° rotational symmetry, allows for a positive axial rake and negative radial rake configuration, enhancing cutting efficiency by optimizing the geometry of cutting edges and rake surfaces, thereby reducing power requirements and improving chip removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a cutting insert is designed with conventional geometry, then it can be used in standard milling operations, but it cannot achieve optimal rake angles for efficient metal cutting, leading to increased power consumption and poor chip removal
Solution Approach 1:
The cutting insert employs asymmetric geometry where the end surfaces are rotated 45 degrees relative to each other, creating non-parallel configurations that enable optimal positive axial rake and negative radial rake angles simultaneously. This asymmetric design allows the cutting edges to engage the workpiece at optimized angles, improving cutting efficiency while reducing power consumption compared to conventional symmetric inserts.
Solution Approach 2:
The invention utilizes the rotational dimension by rotating one end surface 45 degrees relative to the other, effectively using the angular/rotational dimension to create multiple optimized cutting edges. This dimensional approach allows the same insert body to present different rake angle configurations during operation, enabling optimal cutting geometry without requiring multiple separate inserts.
2Productivity
If a cutting insert is designed with conventional geometry, then it can maintain structural simplicity, but it cannot optimize both axial and radial rake relations, leading to suboptimal chip removal
Solution Approach 1:
The cutting insert employs asymmetric geometry where the end surfaces are rotated 45 degrees relative to each other, creating non-parallel configurations that enable optimal positive axial rake and negative radial rake angles simultaneously. This asymmetric design allows the cutting edges to engage the workpiece at optimized angles, improving cutting efficiency while reducing power consumption compared to conventional symmetric inserts.
Solution Approach 2:
The cutting insert is designed as a universal tool that can achieve multiple cutting functions with a single geometry. By rotating the end surfaces 45 degrees relative to each other, the insert can present different cutting edges with optimized rake angles for various milling operations, eliminating the need for multiple specialized inserts and simplifying tool management while maintaining geometric optimization.
Data Source
Figure 1A~1B
Figure 1C
Figure 1D~1E
AI summary
A cutting insert has polygonal first and second end surfaces which are connected by a peripheral side surface, each end surface defining first and second end planes, respectively. The peripheral side surface has first peripheral side portions alternated in the circumferential direction with second peripheral side portions. The first peripheral side portions are inverse copies of the second peripheral side portions. Each peripheral side portion includes first and second sub-faces which form different angles with the first and second end planes. The first and second sub-faces intersect one another between the first and second end planes to form a line which is parallel to the first and second end planes.