Tool Holder Nub Clamping Mechanism for Cutting Insert Security
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Solution Overview
Problem
Existing tool holder mechanisms for clamping cutting inserts are difficult to manufacture with tight tolerances, making them costly and challenging to produce effectively.
Innovation Solution
A tool holder design featuring a pair of notches on the cutting insert and corresponding nubs on the clamp that securely engage to hold the insert in place, allowing for easier manufacturing and improved clamping efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conical bore mechanism is used to tilt the locking pin into abutment with the cutting insert, then the clamping reliability is improved, but the manufacturing precision requirement increases and manufacturing difficulty increases
Solution Approach 1:
The clamping mechanism is segmented into distinct functional elements: the clamp body, the locking pin, and the cutting insert with notches. The locking pin is separated from the clamp body and positioned independently, eliminating the need for a complex conical bore while maintaining clamping reliability through the notched engagement geometry.
Solution Approach 2:
Instead of tilting the locking pin into abutment using a conical bore, the invention inverts the approach by providing notches on the cutting insert that directly receive and engage with the locking pin. This reverses the traditional mechanism, simplifying the clamp body structure and reducing manufacturing precision requirements.
2Reliability
If a conical bore mechanism is used to tilt the locking pin, then the clamping reliability is improved, but the device complexity increases
Solution Approach 1:
The clamp structure is segmented into simpler components: a clamp body with a straightforward bore, a separate locking pin, and a cutting insert with notches. This segmentation eliminates the need for a complex conical bore integration, reducing overall device complexity while maintaining functional effectiveness.
Solution Approach 2:
The invention simplifies the clamp structure by inverting the traditional approach: instead of a complex conical bore mechanism to tilt the locking pin, the cutting insert itself provides the geometric feature (notches) that enables reliable engagement with a simpler locking pin arrangement.
3Reliability
If tight manufacturing tolerances are maintained for the conical bore, then the clamping reliability is improved, but the manufacturing cost increases
Solution Approach 1:
By segmenting the clamping system into modular components with standardized features (notches on the insert, simple bore in the clamp), the invention enables manufacturing with relaxed tolerances. This segmentation allows each component to be manufactured independently at lower cost while maintaining overall system reliability through the notched engagement.
Solution Approach 2:
The invention reduces manufacturing cost by inverting the approach: instead of requiring tight tolerances on the clamp body's conical bore, the cutting insert is given the precise geometric features (notches) that define the engagement geometry. This shifts the precision requirement to the insert, which is typically manufactured with high precision anyway, while allowing the clamp to be made more economically.
Data Source
AI summary
A tool holder includes a tool holder body with an insert-receiving pocket and a clamp for clamping a cutting insert. The clamp includes a pair of downwardly extending nubs that engage a pair of notches in the cutting insert when the clamp is brought into pressing engagement with the insert, thereby securely clamping the cutting insert in the insert-receiving pocket of the tool holder.