Cutting Insert Chip Breaker Segmentation for Load Reduction
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Solution Overview
Problem
Cutting inserts with polygonal shapes experience high cutting loads and inefficient cooling due to chip-chip breaker contact at two points, leading to unstable chip formation and reduced lifespan during machining, especially when cutting forged steel for vehicle components.
Innovation Solution
The cutting insert features main and corner cutting edges, chip breakers, convex dots, and bridges that allow the chip to contact at three points, reducing cutting loads and enhancing cooling by distributing heat effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the chip contacts the chip breaker at two points, then the chip breaker structure is simple, but the cutting load increases and chip formation becomes unstable
Solution Approach 1:
The chip breaker surface is segmented into multiple contact regions (first contact point, second contact point, third contact point) rather than a single continuous surface. This segmentation allows the chip to contact at multiple discrete points, distributing the cutting load and improving chip formation stability while maintaining structural simplicity.
2Device complexity
If the chip contacts the chip breaker at two points, then the chip breaker structure is simple, but chip curls are not uniformly formed and long chips are generated
Solution Approach 1:
The chip breaker is divided into multiple functional zones with different contact points that work sequentially to form uniform chip curls. The first contact point initiates curling, the second contact point refines the curl shape, and the third contact point ensures consistent chip size, achieving uniform chip formation without complex structures.
Solution Approach 2:
Different regions of the chip breaker are designed with specific local characteristics - each contact point has optimized geometry and positioning to perform its specific function in the chip curling process, ensuring uniform chip formation through localized quality optimization rather than uniform design.
3Device complexity
If the chip contacts the chip breaker at two points, then the cooling effect is limited, but the chip breaker structure remains simple
Solution Approach 1:
The chip breaker contact surface is segmented into multiple contact points that increase the total contact area between the chip and the chip breaker. This segmentation allows for more effective heat transfer from the cutting insert through the chip to the chip breaker, improving cooling efficiency while maintaining structural simplicity.
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
This configuration reduces cutting loads, improves chip uniformity and size consistency, and extends the lifespan of the cutting insert by enhancing heat transfer and cooling efficiency.
Implementation Method 1
chip breakers 70 which are formed between the upper surface 11 and the main cutting edges 20 and break a chip
Implementation Method 2
The cut chip may exchange heat while coming into contact with the chip breaker, and the discharge of the heated cut chip assists in cooling the cutting insert
Data Source
AI summary
The present disclosure relates to a cutting insert. The cutting insert according to the exemplary embodiment of the present disclosure has a dot formed between a main cutting edge and a chip breaker, and the dot has a bridge formed between the main cutting edges. Therefore, a chip, which is produced during a cutting process, may come into contact with three points on a main cutting edge land portion, the bridge, and the dot. The chip may discharge heat generated from the cutting insert while the chip comes into contact with the three points.