Tangential Cutting Inserts With Fan-Shaped Edges
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Solution Overview
Problem
Conventional indexable cutting inserts with sinusoidal and helical cutting edges face challenges due to insufficient space in tool holders, leading to weak support and reduced performance during cutting operations, as the complex edges and surfaces create unstable connections.
Innovation Solution
The design of tangential cutting inserts with a fan-shaped cutting portion and a square base portion, along with tool holders featuring helical insert pockets and coolant outlets, provides stable support and efficient coolant distribution, enabling the formation of a continuous sinusoidal and helical cutting edge while maintaining indexability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If conventional rectangular or square cutting inserts are used to form sinusoidal and helical cutting edges, then the cutting edge complexity is achieved, but the insert support stability deteriorates due to insufficient space in the tool holder pocket
Solution Approach 1:
The cutting insert is divided into two distinct portions: a base portion with a square profile for stable support in the tool holder pocket, and a cutting portion with a fan-shaped profile that extends beyond the base portion to form the sinusoidal and helical cutting edges. This segmentation allows each portion to optimize its function independently.
Solution Approach 2:
The cutting portion extends in a radial direction beyond the base portion, creating a three-dimensional fan-shaped structure. This dimensional extension provides the necessary space for complex sinusoidal and helical cutting edges while maintaining a compact base for stable support in the tool holder.
2Adaptability or versatility
If the cutting insert has extended fan-shaped surfaces for sinusoidal and helical edges, then the cutting edge functionality is improved, but the connection strength between insert and tool holder deteriorates
Solution Approach 1:
The insert is segmented into a base portion that interfaces with the tool holder pocket for strong mechanical connection, and a cutting portion that extends outward to provide the complex sinusoidal and helical cutting functionality. The segmentation ensures that the extended cutting surfaces do not compromise the connection strength at the base.
3Shape
If tool holder pockets are designed with complex surfaces to accommodate sinusoidal and helical cutting edges, then the cutting edge complexity is achieved, but the connection reliability deteriorates due to weak connections
Solution Approach 1:
Instead of making the tool holder pocket complex to accommodate the cutting edges, the invention inverts the approach by making the cutting insert itself complex with fan-shaped surfaces that extend from a simple square base. This allows the tool holder pocket to remain simple and reliable while the insert provides the necessary cutting edge complexity.
Data Source
AI summary
Cutting tool systems including a tool holder and tangential cutting inserts are disclosed. The tangential cutting inserts have indexable cutting edges that may be sinusoidal-shaped and helical-shaped. The tangential cutting inserts have integrated fan and base portions. The tool holders comprise a plurality of insert pockets structured and arranged to receive the indexable tangential cutting inserts. The cutting tool systems provide cutting tools with effectively longer sinusoidal and helical cutting edges at their cutting rake faces and a strong support when seating in insert-receiving pockets on the tool holder.