Asymmetric Cutting Insert Shank for Coolant Delivery
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Solution Overview
Problem
Existing cutting tools face challenges in achieving better engagement between the cutting insert and the holder, as well as ensuring adequate coolant coverage for various cutting edge locations.
Innovation Solution
A cutting tool design featuring an asymmetric insert shank with specific depressions and abutment surfaces that form coolant channels with the holder's clamping surface, providing a secure three-point abutment and improved coolant distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a symmetric insert clamping portion is used, then the structure is simple and easy to manufacture, but the engagement precision between cutting insert and holder is insufficient
Solution Approach 1:
The insert clamping portion is designed with an asymmetric cross-section featuring three distinct depressions and corresponding abutment surfaces arranged asymmetrically around the insert axis. This asymmetric configuration enables three-point engagement with the holder, significantly improving engagement precision and positioning accuracy compared to symmetric designs.
2Object-affected harmful factors
If coolant channels are not integrated into the insert shank, then the structure is simpler, but coolant coverage for various cutting edge locations is inadequate
Solution Approach 1:
The coolant channels are integrated directly into the insert shank structure, merging the coolant delivery function with the structural components. The first, second, and third depressions in the insert clamping portion form coolant channels that work in conjunction with the holder's clamping surface, ensuring comprehensive coolant coverage to all cutting edge locations through this merged design.
3Reliability
If multiple depressions and abutment surfaces are added to the insert clamping portion, then engagement precision and coolant coverage improve, but manufacturing complexity increases
Solution Approach 1:
The insert clamping portion is segmented into multiple functional zones with three distinct depressions (first, second, and third) and corresponding abutment surfaces. This segmentation allows each depression to serve specific dual purposes: providing precise positioning through abutment surfaces and forming coolant channels, thereby improving clamping reliability while maintaining manufacturing feasibility through modular design.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances engagement precision and coolant coverage, leading to improved tool performance and extended tool life by ensuring accurate clamping and efficient coolant delivery to critical cutting edge areas.
Implementation Method 1
the first and second depressions form coolant channels with a clamping surface of the holder
Data Source
Figure 1~2
Figure 3~5
AI summary
A cutting insert has a longitudinal insert axis A, a cutting head and an insert shank which extends rearwardly from the cutting head. The insert shank includes an insert clamping portion with an asymmetric cross section taken perpendicular to the insert axis A. The insert shank has a peripheral surface extending along at least a portion of the total length of the insert shank. The cutting insert has a first dividing plane P1. On one side of the first dividing plane P1, the peripheral surface comprises first and second longitudinally extending depressions. On the other side of the first dividing plane P1, the peripheral surface comprises first and second abutment surfaces separated by a third depression, the first and second depressions being separated by a third abutment surface.