Cutting Tool Clamping Wedge With Embedded Force Sensor
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Solution Overview
Problem
Existing cutting tools face challenges in accurately measuring forces near the cutting edge without compromising mechanical stability, as sensors are often difficult to mount close to the processing point due to space and stability constraints.
Innovation Solution
A cutting tool design featuring a sensor integrated into a recess within the clamping element, which allows for precise placement near the cutting edge without affecting the tool's stability, using a clamping element with a recess to house the sensor and a separate fastening element for secure attachment, enabling accurate force measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sensor is mounted as close as possible to the cutting edge, then measurement precision is improved, but mechanical stability deteriorates
Solution Approach 1:
The clamping element is divided into functional zones: a first clamping surface for securing the cutting insert, a second clamping surface for securing the clamping element itself, and a recess area for housing the sensor. This segmentation allows the sensor to be positioned close to the cutting edge while the separate clamping surfaces maintain mechanical stability.
Solution Approach 2:
The sensor is nested within a recess in the clamping element, placing it in immediate proximity to the cutting insert for accurate force measurement. The recess integrates the sensor into the clamping element structure without adding external components that would compromise stability.
2Ease of manufacture
If the sensor is mounted at the connection point, then ease of manufacture is improved, but measurement precision deteriorates
Solution Approach 1:
The clamping element serves multiple functions: it clamps the cutting insert via the first clamping surface, secures itself to the holder via the second clamping surface, and houses the sensor in its recess. This multi-functionality integrates measurement capability into the existing clamping structure, maintaining ease of manufacture while improving measurement precision through closer proximity to the cutting edge.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration allows for precise and accurate force measurement close to the cutting edge while maintaining tool stability, with the sensor being positioned to minimize interference and optimize clamping force, resulting in improved measurement accuracy and tool performance.
Implementation Method 1
EP 1 984 142 B1, for example, discloses that piezoceramic sensors can be used to measure the compressive, tensile and shear forces exerted on the cutting body or the holder of the tool
Data Source
AI summary
Tool for machining a workpiece, comprising a cutting insert having at least one cutting edge, a cutting insert holder comprising a cutting insert receptacle for receiving the cutting insert, a clamping element acting as a clamping wedge, which can be fastened in the cutting insert receptacle for clamping the cutting insert in the cutting insert holder, a fastening element for fastening the clamping element in the cutting insert holder and simultaneously clamping the cutting insert in the cutting insert holder, and a sensor configured to generate a measurement signal that is dependent on a force acting on the cutting insert, wherein the clamping element comprises a recess in which the sensor is arranged.