Tool Holder Anti-Rotation via Asymmetric Positioning Surfaces
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing tool holders fail to ensure reliable and correct installation of cutting plates and support plates, leading to potential misalignment and reduced tool effectiveness.
Innovation Solution
The support plate and cutting plate are designed with non-circular positioning surfaces on their peripheral surfaces, which can only align correctly with specific contact surfaces on the tool holder, preventing incorrect installation and providing anti-twist protection through a pin-and-bore mechanism and lateral support collar.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If round cutting plates and support plates are used, then ease of manufacture is improved, but reliability of correct installation deteriorates due to potential rotation and misalignment
Solution Approach 1:
The patent applies asymmetry by introducing non-circular positioning surfaces (flat or angled surfaces) on the otherwise round cutting plate and support plate. These asymmetric features create a unique orientation that prevents rotation, ensuring the plates can only be installed in the correct position while maintaining the overall circular shape for ease of manufacture
2Reliability
If positioning surfaces are added to prevent rotation, then reliability of installation is improved, but device complexity increases
Solution Approach 1:
The patent applies local quality by adding positioning surfaces only at specific locations on the peripheral surface of the round plates, rather than changing the entire plate geometry. This localized modification prevents rotation and ensures correct installation while minimizing the impact on overall device complexity and maintaining manufacturing simplicity
3Reliability
If anti-twist protection is added through pin and bore mechanism, then reliability is improved, but ease of operation deteriorates due to more complex assembly
Solution Approach 1:
The patent merges the anti-twist protection function with the existing pin-and-bore clamping mechanism. The positioning surfaces work in conjunction with the clamping claws and pins, combining multiple functions (positioning, anti-rotation, and clamping) into a unified assembly process that maintains ease of operation while ensuring reliable installation
Data Source
Figure 1~2
Figure 3~4
AI summary
The invention relates to a tool holder (1) for a cutting tool comprising a support plate (2), a cutting plate (3) and a clamping jaw (4), wherein the support plate (2) is attached in a support plate seat (5) on the tool holder (1) and rests against a support plate contact surface (6) on the tool holder (1), the cutting plate (3) is located in a cutting plate seat (7) on the support plate (2) and rests against a cutting plate contact surface (8) on the tool holder (1), and the clamping jaw (4) is attached to the tool holder (1) and, with a clamping lug (9), presses the cutting plate (3) onto the support plate (2) and simultaneously pulls it against the cutting plate contact surface (8).To ensure that a cutting insert and a support plate can be reliably attached to the tool holder in only two installation positions, it is proposed that the support plate (2) and the cutting insert (3) are round and each have two positioning surfaces (11, 12) opposite each other with respect to the longitudinal axis (10) on their circumferential surfaces, which deviate from the round shape, the support plate contact surface (6) and the cutting insert contact surface (8) are adapted to the positioning surfaces (11, 12), and that the support plate (2) and the cutting insert (3) can only be attached to the tool holder (1) if the positioning surface (12) of the support plate (2) rests against the support plate contact surface (6) and the positioning surface (11) of the cutting insert (3) rests against the cutting insert contact surface (8).