Clamp Pocket Cutting Tool for Dense Insert Mounting
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Solution Overview
Problem
Existing cutting tools face challenges in maximizing the number of cutting inserts on a tool body of a given diameter due to space constraints, particularly with traditional fastening mechanisms that require significant space for screws and threaded holes, limiting the efficient use of space between insert seats.
Innovation Solution
A cutting tool design featuring a clamp and clamping mechanism with a screw that allows for efficient and reliable securing of cutting inserts using a single-threaded screw, where the clamp can tilt and move transversally, reducing the need for tight tolerances and minimizing space usage, enabling more inserts to be mounted on a tool body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional screw fastening means is used through a through hole in the cutting insert, then reliable securing of the cutting insert is achieved, but large space is required in the tool body between insert seats
Solution Approach 1:
The clamp is moved from a traditional through-hole fastening approach to a pocket-based system where the clamp operates in a dedicated clamp pocket adjacent to the insert seat. This spatial reorganization allows the fastening mechanism to function reliably while minimizing the space required between insert seats, as the clamp pocket provides a confined area for the clamping action without requiring extensive space in the tool body.
Solution Approach 2:
The clamp is received within a clamp pocket that is integrated into the tool body structure, nesting the fastening mechanism within an existing spatial framework. This nesting approach allows the clamp and its associated screw to be housed in a compact configuration adjacent to the insert seat, reducing the overall space requirement compared to traditional through-hole fastening that requires space both in front of and behind the insert.
2Productivity
If more cutting inserts are mounted on the tool body, then productivity is improved, but space constraints and manufacturing precision requirements increase
Solution Approach 1:
The clamp acts as an intermediary element between the screw and the cutting insert, providing a mechanical advantage that amplifies the clamping force. The clamp's lever arm, extending from the clamp pocket toward the insert seat, allows a relatively small screw torque to generate sufficient clamping force on the insert. This intermediary mechanism reduces the precision requirements for both the screw-insert engagement and the clamp positioning, enabling tighter tolerances to be achieved more easily.
Solution Approach 2:
The clamp is designed with the ability to tilt and move transversally relative to the screw axis, providing dynamic adjustment capability. This movement freedom allows the clamp to self-align and compensate for minor variations in insert positioning or clamp pocket dimensions, reducing the impact of manufacturing tolerances. The dynamic nature of the clamp mechanism enables reliable clamping even when precise pre-positioning is difficult to achieve, thereby supporting higher insert counts without proportionally increasing precision requirements.
Data Source
AI summary
A cutting tool including a tool body with an insert seat and an associated clamp pocket, a cutting insert releasably mountable in the insert seat, a clamp received in the clamp pocket and a screw that extends with play through a through hole in the clamp and is engaged in a hole at the bottom of the clamp pocket, is provided. Upon tightening of the screw, the clamp will slide against an inclined guide surface in the slide pocket via a slide surface on the clamp, which will force the clamp to move transversally to the screw shaft towards the cutting insert such that a clamp protrusion on the clamp is moved into a recess in the cutting insert and clamping surfaces on the clamp are pressed tightly against corresponding contact surfaces on the cutting insert.