Strain gauge integrated three-dimensional turning force sensor

Abstract

A strain gauge integrated three-dimensional turning force sensor comprises a sensor main structure, wherein a turning tool is installed in a turning tool slot of the sensor main structure, a first vertical octagonal semi-ring and a second vertical octagonal semi-ring are arranged on an upper surface and a lower surface of a middle portion of the sensor main structure respectively, a front side and a rear side of the middle portion of the sensor major structure are connected with a first horizontal octagonal semi-ring and a second horizontal octagonal semi-ring respectively, a tail portion of the sensor major structure is provided with a sensor handle, a foil-type resistance strain gauge is respectively packaged on an inner surface and an outer surface of each octagonal semi-ring, by means of an elastomeric structure, dynamic characteristics of a measuring cell are improved, and accurate measurement of three-dimensional turning forces is achieved. The strain gauge integrated three-dimensional turning force sensor not only can measure dynamic forces, but also is applied to measuring static forces, assembling and maintaining of the strain gauge integrated three-dimensional turning force sensor are more simple and reliable, and costs are reduced.

Description

technical field [0001] The invention relates to the technical field of intelligent manufacturing equipment, in particular to a strain gauge integrated three-dimensional turning force sensor. Background technique [0002] In metal cutting, turning is one of the most common processing methods. Turning force is an important index to reflect the turning process. The magnitude of the turning force is closely related to the change of the turning process. Every small change in the turning state can be reflected by the change of the turning force. Turning force is closely related to tool wear, machining accuracy, turning temperature, power consumption, etc. Therefore, how to accurately measure turning force is very important to improve machining performance. [0003] Traditional turning force dynamometers mainly include mechanical, hydraulic, capacitive, inductive, piezoelectric, and strain gauge types. Among them, the mechanical and hydraulic types can only measure the average cu...

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Problems solved by technology

Among them, the mechanical and hydraulic types can only measure the average cutting force due to their low rigidity and large inertia, which are of low value in practical engineering applications; The structure of the dynamometer is complex, and the capacitive and inductive dynamometers are non-proportional links, so there are still shortcomings of static linearity errors; compared with the strain gauge dynamometer, the piezoelectric dynamometer has a higher natural frequency and is suitable for dynamic measurement, but the static force cannot be tested due to charge leakage, and the position error of the piezoelectric dynamometer is large, it is easy to break down the electron tube, it is extremely inconvenient to maintain, the assembly accuracy is high, the debugging is troublesome, the price is expensive, and it is greatly affected by the use. limit

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