Turning Insert Top Contact Surfaces for Stable Load Distribution
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Solution Overview
Problem
Existing turning tools face limitations in design flexibility due to the mutual design constraints between the stop surfaces of the insert seat and the contact surfaces of the cutting insert, which affects the guidance, stability, and load distribution during cutting operations.
Innovation Solution
The turning tool design features a cutting insert with contact surfaces arranged on the top surface, extending at an angle relative to the reference planes, allowing for increased flexibility in design and enabling improved load distribution and stability. The insert seat includes stop surfaces positioned to receive these contact surfaces, facilitating a fixed position for the cutting insert.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the contact surfaces are arranged on the circumferential side surface of the cutting insert, then the insert seat can be designed to be form-fitting and slim, but the design flexibility of the contact surfaces and stop surfaces is limited
Solution Approach 1:
The contact surfaces are relocated from the circumferential side surface to the top surface of the cutting insert. This dimensional change allows the contact surfaces to extend in planes forming angles with reference planes, providing greater design flexibility for both the contact surfaces and the corresponding stop surfaces in the insert seat, while maintaining a slim and form-fitting insert seat structure.
2Adaptability or versatility
If the contact surfaces extend at an angle on the top surface, then design flexibility and load distribution are improved, but the positioning precision requirements increase
Solution Approach 1:
The contact surfaces are designed with different orientations and extensions on the top surface, with each surface extending in a plane forming a specific angle with reference planes. This local differentiation allows optimized load distribution in various directions while maintaining precise positioning through the corresponding stop surfaces in the insert seat.
3Reliability
If the stop surfaces are positioned at upper parts of the side wall sections, then the cutting insert guidance is improved, but the insert seat height increases
Solution Approach 1:
The contact surfaces are arranged on the top surface extending at angles, allowing the stop surfaces to be positioned at upper parts of the side wall sections for improved guidance stability. The angular extension of contact surfaces compensates for the increased height by providing better geometric constraint and guidance for the cutting insert.
Data Source
Figure 1a~1d
Figure 2a~2d
Figure 3~7
AI summary
The invention relates to a turning tool (1) comprising a tool body (2) and a cutting insert (3a). The tool body comprises an insert seat with a bottom surface and two side wall sections. A stiff member (16) interconnects the side wall sections at upper parts thereof and is provided with stop surfaces. The cutting insert (3a) comprises top (7) and bottom surfaces interconnected by a circumferential side surface (9) and two opposite nose portions (10a) provided with cutting edges. The cutting insert further comprises contact surfaces (17a-17d) on the top surface thereof associated with and configured to bear against to get support by the stop surfaces on the stiff member in a mounted state of the tool. The invention also relates to a cutting insert and tool body for such a tool and methods for producing a turning tool and a cutting insert.