Threading Insert With Inclined Wedge Clamping
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Solution Overview
Problem
Conventional cutting inserts for threading have limited clamping capability, which restricts the cutting efficiency, especially when dealing with large pitch thread grooves, and there is a need to enhance the clamping capability to improve cutting performance.
Innovation Solution
A cutting insert design featuring two opposing end surfaces with a peripheral side surface that includes different side surface portions, forming cutting edges at intersecting ridgelines, with inclined portions and chip breaker grooves, and a tool body with insert seats that engage these features to enhance clamping, allowing for increased cutting efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the cutting insert uses conventional clamping structure with through holes near the center, then the structure is simple and easy to manufacture, but the clamping capability is limited and cannot handle high cutting forces
Solution Approach 1:
The invention transitions from conventional through-hole clamping to a multi-dimensional engagement system. The inclined portion on the insert engages with the inclined surface of the insert seat, creating a wedge-like mechanical interlocking effect that adds a new dimension to the clamping mechanism, significantly enhancing clamping capability without complicating the insert structure
Solution Approach 2:
The inclined portion acts as an intermediary element between the cutting insert and the insert seat. This inclined surface engagement serves as a mechanical mediator that distributes and amplifies the clamping force, enabling the system to handle high cutting forces while maintaining structural simplicity
2Productivity
If the cutting condition is heightened to improve cutting efficiency, then the productivity increases, but the cutting force increases which exceeds the clamping capability of conventional inserts
Solution Approach 1:
The inclined engagement structure creates a counteracting mechanical advantage that balances the increased cutting forces. The wedge-like interaction between the inclined portion and insert seat generates opposing forces that stabilize the insert under high loading conditions, enabling heightened cutting conditions without compromising clamping stability
3Stability of the object's composition
If the through holes are formed closer to the center for conventional clamping, then the manufacturing is simple, but the stability of the cutting insert is impaired under high cutting forces
Solution Approach 1:
The invention introduces asymmetry through the inclined portion that engages with the inclined surface of the insert seat. This asymmetric geometry creates a mechanical interlocking effect that significantly enhances insert stability under cutting forces, while the asymmetry is integrated into the overall insert shape without requiring additional complex manufacturing steps
Data Source
AI summary
A cutting insert for threading of the present invention includes two opposing end surfaces and a peripheral side surface extending therebetween. The peripheral side surface has a first side surface portion and a second side surface portion arranged at different positions in a circumferential direction. A cutting edge is formed at an intersecting ridgeline portion between the first end surface and the first side surface portion and at least a portion of this cutting edge has a shape corresponding to a thread groove. The second side surface portion has an inclined portion which enlarges outward from the side of the first end surface toward the side of the second end surface. This inclined portion is configured to engage with a side wall surface of a tool body so as to prevent floating of the cutting insert.