Dove Tail Anvil Projecting Element for Insert Positioning
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Solution Overview
Problem
Existing cutting tools face challenges in insert positioning accuracy, particularly during threading, due to the use of anvils with different top and bottom angles, and require a versatile and durable anvil design compatible with various geometries.
Innovation Solution
A metal cutting tool with a replaceable anvil having a projecting element of dove tail shape, mirror symmetrical about a plane, and a fastening mechanism that includes a U-shaped clamp or set screw for secure attachment, eliminating the need for an anvil sleeve and allowing compatibility with different holders.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an anvil sleeve is used to fasten the anvil in the seat, then the anvil can be secured in place, but the insert positioning accuracy deteriorates, especially at threading
Solution Approach 1:
The patent removes the anvil sleeve component entirely and replaces it with a projecting element that is integrally formed with the anvil body. This extraction of the sleeve eliminates the source of positioning inaccuracy while maintaining the fastening function through the projecting element's interaction with the seat's pin.
Solution Approach 2:
The projecting element is merged with the anvil body as an integral structure, eliminating the need for a separate anvil sleeve. This merging reduces the number of components and eliminates the positioning errors that occur with sleeve-based fastening systems.
2Manufacturing precision
If anvils with different top and bottom angles are used for different thread helix angles, then threading accuracy is improved, but the device complexity increases
Solution Approach 1:
The projecting element is designed with mirror symmetry about a plane, allowing a single anvil design to accommodate different thread helix angles and orientations. This universal design eliminates the need for multiple specialized anvils while maintaining threading accuracy.
Solution Approach 2:
The projecting element incorporates asymmetric reaction surfaces at different angles relative to the symmetry plane, allowing the same component to function correctly for different thread configurations. The asymmetric geometry enables adaptation to various helix angles without requiring different anvil types.
3Strength
If a center hole is made smaller for P-lever clamping, then the clamping rigidity is improved, but the anvil compatibility with other holders deteriorates
Solution Approach 1:
The projecting element design enables the anvil to be compatible with multiple holder types including P-lever, C-lock, and center screw holders. The integral projecting element adapts to different fastening mechanisms without requiring different anvil designs, maintaining both rigidity and versatility.
4Stability of the object's composition
If the projecting element is made rigid, then the insert clamping stability is improved, but the ease of manufacture deteriorates
Solution Approach 1:
The projecting element is formed as an integral part of the anvil body, typically through sintering or casting processes. This merging allows the rigid structure to be manufactured as a single piece, maintaining clamping stability while simplifying production compared to assembling multiple components.
Data Source
AI summary
A metal cutting tool includes a tool holder, a seat in the tool holder defined by side walls and a bottom surface. A replaceable element formed by an insert seating anvil is positioned in the seat and secured by a fastening device. A cutting insert is supported on a base surface of the anvil. The anvil has a projecting element formed integrally with the anvil. The projecting element is rigid and has a dove tail shape in top view, wherein the projecting element base and lower surfaces form coplanar extensions of the base and lower surfaces of the rest of the anvil.