Cutting Insert Asymmetric Back Face High-Feed Clamping
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Solution Overview
Problem
Existing cutting tools face issues with clamp screw damage and inadequate clamping force during high-feed processing, leading to separation of the cutting insert from the holder.
Innovation Solution
The cutting insert features a non-symmetric convex 'V' shape on its back side face portion, with inclined faces at different angles, dispersing force applied to the clamp screw and enhancing clamping security, while also simplifying manufacturing and improving mounting precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a conventional symmetric back cross-section structure is used, then longitudinal resistance can be supported stably, but lateral cutting resistance cannot be adequately countered during high-feed processing, leading to clamp screw damage
Solution Approach 1:
The back cross-section of the cutting insert is designed with an asymmetric structure where the first back side face has a different inclination angle than the second back side face. This asymmetry creates unequal contact areas with the holder jaws, allowing the larger contact area to bear more of the lateral cutting resistance, thereby preventing clamp screw damage during high-feed processing while maintaining stable longitudinal support
2Reliability
If a non-symmetric convex 'V' shape is used on the back side face portion, then force is dispersed and clamping is improved, but manufacturing complexity increases
Solution Approach 1:
The non-symmetric convex 'V' shape is implemented only on the back side face portion of the cutting insert, while other portions maintain conventional simple geometries. This localized application of complexity achieves the force dispersion and improved clamping benefits without requiring complete redesign of the entire insert, thus limiting the increase in manufacturing complexity
Data Source
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AI summary
The cutting insert according to the present invention comprises an upper face and a lower face; a front side face portion and a back side face portion, the front and back side face portions connecting the upper face and the lower face; and a through-hole passing through the upper face and the lower face, wherein a cutting edge is formed in the front side face portion, and the back side face portion is provided with a first inclined face and a second inclined face which are inclined forwardly at different angles, respectively, with respect to a plane normal to a rotational axis, and the first inclined face is longer than the second inclined face so that the back side face portion has a non-symmetrical convex "V" shape.