Cutting Insert With Segmented V-Clamping For Grooving Stability
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Solution Overview
Problem
Cutting tools and inserts face challenges in stability and resistance to transverse forces during turning operations, with a high risk of fracture under axial direction machine feed in grooving operations, and unreliable clamping contact throughout the process.
Innovation Solution
A cutting tool design featuring an insert holder with V-shaped clamping surfaces of different wedge angles and a cutting insert with mirror symmetry, where clamping contact occurs at specific sections, distributing forces effectively to enhance stability and reduce the risk of fracture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If V-shaped clamping surfaces with obtuse wedge angles are used to support central main forces, then the risk of insert fracturing is minimized, but transverse force support is reduced
Solution Approach 1:
The clamping system is segmented into multiple V-shaped clamping surfaces with different wedge angles. The first V-shaped clamping surface (obtuse angle) supports axial direction forces, while the second V-shaped clamping surface (narrower angle) supports transverse forces. This segmentation allows each surface to be optimized for its specific force direction, resolving the contradiction between axial strength and transverse stability.
Solution Approach 2:
Different regions of the clamping system are given different local qualities through varying wedge angles. The first V-shaped clamping surface has an obtuse wedge angle optimized for absorbing axial direction machine feed forces, while the second V-shaped clamping surface has a narrower wedge angle optimized for supporting transverse forces. This local differentiation resolves the contradiction by providing specialized support for each force direction.
2Reliability
If a small gap exists between ridge and flute side surfaces to accommodate manufacturing accuracies, then the risk of insert fracture is reduced, but initial transverse movement occurs at commencement of operation
Solution Approach 1:
The wedge angle parameter of the V-shaped clamping surfaces is specifically designed and optimized. The first V-shaped clamping surface uses an obtuse wedge angle to minimize fracture risk, while the second uses a narrower angle to reduce initial transverse movement. By carefully selecting and differentiating these angular parameters, the system accommodates manufacturing accuracies while minimizing both fracture risk and initial movement.
3Stability of the object's composition
If multiple V-shaped clamping surfaces with different wedge angles are introduced to support both axial and transverse forces, then stability and force distribution are improved, but device complexity increases
Solution Approach 1:
The V-shaped clamping surfaces serve multiple functions within a unified clamping system. Each V-shaped surface is designed to handle specific force directions (axial or transverse), but collectively they provide comprehensive support for all operational forces. This multi-functionality approach improves stability without proportionally increasing complexity, as the same basic V-shaped geometry is reused with different angular parameters.
Data Source
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AI summary
A cutting tool for grooving and turning operations has a removably securable cutting insert. The cutting insert is clamped in an insert holder with a longitudinally extending insert receiving slot lower surface. The insert receiving slot lower surface has two separate contact sections, including a first contact section at a rear end having a V-shaped clamping surface with a wedge angle a1 in clamping contact with a first V-shaped clamping surface of the cutting insert lower surface also with a wedge angle a1, and a second contact section at a front end having a V-shaped clamping surface with a wedge angle a2 making clamping contact with a second V-shaped clamping surface of the cutting insert lower surface also with a wedge angle a2, where a1 and a2 are different.