Cutting Insert With Multi-Level Chip Breakers
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Solution Overview
Problem
Existing cutting inserts for machining workpieces are optimized for specific cutting depths and feed rates, leading to poor chip formation outside these parameters, and struggle with varying material types such as soft and tough metallic materials.
Innovation Solution
A cutting insert design featuring three consecutive chip breakers at different levels, with varying plateau levels and an increased rake angle that decreases from the cutting corner, ensuring good chip control across different feed speeds, cutting depths, and material types by utilizing multiple chip breakers effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cutting insert is optimized for a specific cutting depth and feed rate, then good chip control is achieved at those parameters, but chip formation deteriorates outside the optimized application area
Solution Approach 1:
The chip breaker structure is divided into multiple discrete chip breakers (first chip breaker, second chip breaker, third chip breaker) arranged at different positions and orientations. Each chip breaker is designed to handle specific cutting conditions, allowing the system to adapt to varying feed rates and cutting depths by engaging different chip breakers appropriately, thus resolving the contradiction between optimized performance at specific parameters and adaptability across a range of parameters.
Solution Approach 2:
The cutting insert employs a dynamic chip breaker system where the effectiveness of different chip breakers changes based on operating conditions. The chip breakers are positioned and oriented to become actively engaged or disengaged depending on feed rate and cutting depth, enabling the insert to maintain reliable chip control across varying application parameters rather than being fixed to a single optimized point.
2Reliability
If chip breakers are added to improve chip control, then chip formation improves, but the structure becomes more complex
Solution Approach 1:
Multiple chip breakers with different functions and orientations are merged into a single integrated cutting insert structure. The first, second, and third chip breakers are combined with the cutting edge and rake face to form a unified tool design, achieving comprehensive chip control for various cutting conditions without requiring multiple separate tools or excessively complex auxiliary structures.
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The invention relates to a cutting insert (1) for a cutting tool. In a radial direction Q, which extends in a main plane H from the cutting corner (4) to a center Z of the cutting insert (1), the following are formed in the following sequence: a falling cutting surface (8), a chip guiding stage base (9; 9a, 9b, 9c) adjacent to the cutting surface, a first chip guiding stage (11), which is adjacent to the chip guiding stage base and has a first surface (11a) rising from the chip guiding stage base and a first plateau (11b) adjacent thereto, a second chip guiding stage (12), which has a second surface (12a) rising from the first plateau (11b) and a second plateau (12b) adjacent thereto, and a third chip guiding stage (13), which has a third surface (13a) rising from the second plateau (12b) and a third plateau (13b) adjacent thereto.