Cutting Insert Surface Geometry for Chip Flow and Discharge
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Solution Overview
Problem
Existing cutting tools face challenges in effectively managing chip flow and discharge during machining processes, leading to potential chip clogging and reduced durability due to the geometry of the cutting edge and surface interactions.
Innovation Solution
The cutting insert features a unique design with a second portion having a triangular upper surface, a rising surface inclined upward, and a recessed connecting surface, allowing for controlled chip flow and enhanced discharge through acute angles and curved surfaces, reducing the likelihood of chip clogging and improving durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional cutting edge geometry is used, then the cutting tool can maintain simple structure, but chip flow control is poor leading to chip clogging
Solution Approach 1:
The cutting insert is divided into multiple functional surfaces: upper surface, connecting surface, and rising surface. Each surface serves a specific purpose in chip flow control, with the connecting surface featuring an acute angle configuration to effectively guide and discharge chips, preventing clogging while maintaining manageable structural complexity.
Solution Approach 2:
The invention introduces a three-dimensional surface configuration with acute angles between the upper surface, connecting surface, and rising surface. This spatial arrangement creates effective chip flow paths in multiple dimensions, transforming the conventional two-dimensional cutting edge geometry into a three-dimensional chip management system.
2Ease of operation
If the cutting edge geometry is optimized for chip discharge, then chip clogging is reduced, but tool durability decreases due to increased wear
Solution Approach 1:
Different surfaces of the cutting insert are given different geometric properties: the upper surface has a specific orientation for chip reception, the connecting surface features an acute angle for effective chip discharge, and the rising surface provides support. This localized optimization of surface qualities achieves both good chip dischargeability and durability through appropriate geometric distribution.
Solution Approach 2:
The connecting surface is configured with a curved shape that creates an acute angle with both the upper surface and rising surface. This curvature design smoothly guides chips along the discharge path while distributing mechanical stresses, reducing stress concentration points that would otherwise lead to premature tool failure.
3Ease of manufacture
If the cutting insert uses a simple surface configuration, then manufacturing is easier, but chip flow management is ineffective
Solution Approach 1:
The complex chip flow management function is achieved by segmenting the cutting insert into distinct surfaces: upper surface for chip reception, connecting surface with acute angle for chip redirection, and rising surface for support. This segmentation allows each surface to be manufactured using standard processes while collectively achieving effective chip flow management.
Data Source
AI summary
There is a demand for a cutting insert capable of machining a workpiece under a wide range of cutting conditions. The cutting insert has a first portion, and a second portion protruding from a front end of the first portion. The second portion has an upper surface, a cutting edge, a rising surface, and a connecting surface having a recessed curved surface shape. The rising surface is located closer to the first portion than the upper surface, and is inclined upward with increasing distance from the upper surface. The connecting surface is located between the upper surface and the rising surface, and is connected to the upper surface and the rising surface. In a cross section having a bisecting line of a first corner, a virtual extended line of the upper surface and a virtual extended line of the rising surface intersect at an acute angle.