Cassette-Based Cutting Tool for Adjustable Insert Positioning
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Solution Overview
Problem
The design and machining of cutting tool holder bodies are complicated when trying to position cutting inserts at specific angles relative to the tool holder body, and existing tools lack flexibility in application.
Innovation Solution
A cutting tool design featuring a cassette with an insert clamp and a cylindrical base that fits into a tool holder body, along with a wedge clamp to secure the cassette, allowing for adjustable positioning of the cutting edge and simplifying the tool holder body design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the cutting insert is positioned at specific angles relative to the tool holder body, then the cutting edge defines the desired angle with the longitudinal axis, but the design and machining of the tool holder body becomes complicated
Solution Approach 1:
The tool system is divided into separate functional components: a standardized tool holder body and a replaceable cassette assembly. The cassette contains the cutting insert and positioning mechanisms, separating the complex angular positioning function from the simple tool holder body. This allows the tool holder body to remain simple while the cassette handles the complex insert positioning at specific angles.
Solution Approach 2:
The cassette acts as an intermediary component between the tool holder body and the cutting insert. It provides the abutment surface and positioning features that enable precise angular positioning of the insert, while the tool holder body itself remains simple and easy to manufacture. The cassette mediates the complex positioning requirements without complicating the tool holder body design.
2Manufacturing precision
If the cutting insert is positioned at specific angles relative to the tool holder body, then the rake and relief surfaces are properly oriented, but the machining of insert-receiving recesses becomes complicated
Solution Approach 1:
The insert-receiving recesses are moved from the tool holder body to the cassette assembly. The tool holder body only requires simple cylindrical openings, while the cassette contains the complex recesses and abutment surfaces needed for proper insert orientation. This segmentation makes the tool holder body easy to manufacture while maintaining precise rake and relief surface orientation through the cassette's design.
Solution Approach 2:
The cassette serves as an intermediary that contains all the complex machining features for insert positioning. The abutment surfaces and recesses are machined in the cassette rather than the tool holder body, allowing precise orientation of rake and relief surfaces while keeping the tool holder body simple to manufacture.
3Device complexity
If a conventional tool holder body design is used, then the structure is simple, but the tool lacks flexibility in application
Solution Approach 1:
The system transitions from a static, fixed-function tool holder body to a dynamic, adaptable cassette-based system. The tool holder body remains simple and static, while the cassette can be changed to provide different cutting insert configurations, angles, and orientations. This allows the same simple tool holder body to adapt to various applications by simply changing the cassette.
Solution Approach 2:
The standardized tool holder body with cylindrical openings becomes a universal component that can accommodate multiple types of cassettes. Each cassette is designed for specific applications, but all interface with the same simple tool holder body structure. This provides versatility and flexibility in application while keeping the tool holder body design simple.
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 design simplifies the tool holder body design and enhances flexibility by allowing for easier adjustment of the cutting insert's orientation and position, improving the tool's functionality and machining precision.
Implementation Method 1
a cassette clamp comprising a wedge for clamping the cassette relative to the tool holder body
Implementation Method 2
an insert clamp for clamping the insert relative to an abutment surface of the cassette
Data Source
AI summary
A cutting tool includes a cutting insert, the insert including a cutting edge. The cutting tool also includes a cassette including an insert clamp for clamping the insert relative to an abutment surface of the cassette, and a generally cylindrical base portion. The cutting tool also includes a tool holder body, the tool holder body having a cylindrical opening in which the base portion of the cassette is disposed. A cassette clamp including a wedge is provided for clamping the cassette relative to the tool holder body. The cutting edge extends beyond a periphery of the tool holder body when the insert is clamped relative to the abutment surface of the cassette and the cassette is clamped relative to the tool holder body.