Adjustable Cutting Edge Mechanism for Controlled Material Removal
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Solution Overview
Problem
Existing methods for controlling the removal rate of hand-held material and tissue-cutting tools with effectors in surgery and manufacturing lack precision and efficiency, particularly in maintaining working space limits and adjusting cutting edges without significant changes in tool speed or position, leading to potential damage and inefficiencies.
Innovation Solution
A method and system that allow for precise control of the removal rate by mechanically adjusting the cutting edges' position and orientation relative to the tool effector in multiple positions, enabling rapid and precise material removal without significant speed changes, using position-based and signal-based controls to limit the removal rate and enforce preferred directions, with energy sourced from the tool's kinetic energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the cutting edges are adjusted to control material removal rate, then the precision of working space boundary adherence is improved, but the tool speed and position stability deteriorate due to significant speed changes
Solution Approach 1:
The cutting edges are made dynamically adjustable during tool operation, allowing the material removal rate to be modified without changing the overall tool speed. The cutting edges can be repositioned or reoriented in real-time to control removal rate while the tool maintains its rotational speed and positional stability, resolving the contradiction between precision control and speed stability.
2Manufacturing precision
If the tool rotational speed is reduced to control material removal rate, then the precision of working space boundary adherence is improved, but the productivity deteriorates
Solution Approach 1:
The cutting edge is divided into multiple segments or zones that can be independently controlled. By selectively activating or deactivating specific segments of the cutting edge, the material removal rate can be precisely controlled without reducing the overall tool rotational speed. This allows high productivity to be maintained while achieving precise working space boundary adherence through localized cutting control.
3Manufacturing precision
If a protective sleeve is used to limit cutting power, then the working space boundary adherence is improved, but the device complexity and operational efficiency deteriorate
Solution Approach 1:
The cutting tool is designed with multi-functional capability where the same cutting edge structure serves both high-precision boundary adherence and efficient material removal. The cutting edge can dynamically adjust its effective engagement without requiring additional protective sleeves or complex auxiliary structures. This universal design eliminates the need for separate protective mechanisms while maintaining both precision and operational efficiency.
Data Source
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AI summary
The invention relates to a method and a system for the controllable adjustment of the material removal rate of hand-guided material-cutting and tissue-cutting tools and of effectors in accordance with the features disclosed. The object of the invention is to develop a method, a system and a tool which permit the material removal rate of rapidly rotating tools to be controlled without the need for a substantial change in the speed of the tool or a substantial change in the pose, orientation or geometry of said tool. The method, system and tool can be, in particular, advantageously used for the precise observance of working area limits in the removal of material or tissue by means of rapidly rotating machine tools in the surgical and manufacturing fields, in order to produce freeform surfaces. The method, system and tool for the controllable adjustment of the material removal rate of hand-guided material-cutting and tissue-cutting tools and of effectors are characterised in that the material-cutting blades of the effector and/or at least one blade cover can be mechanically set in terms of their pose (position and orientation) in relation to the tool effector in at least two positions, or can be retracted and deployed without any significant change in the removal motion and while a constant speed is maintained.