A wireless transmission piezoelectric four-component dynamometer device

Abstract

A wireless transmission-enabled piezoelectric four-component dynamometer device. An upper dynamometer cover (1) is provided with multiple battery accommodating openings. A battery (7) and a circuit portion (12) are connected via a rear battery cover (5). A three-directional piezoelectric force sensor (9) is located between the upper dynamometer cover (1) and a main dynamometer body (2). The circuit portion (12) is rigidly connected to the upper dynamometer cover (1) and a lower dynamometer cover (3). The lower dynamometer cover (3) has one end rigidly connected to the main dynamometer body (2) and the other end connected to a cutting tool. The invention uses the battery (7) to supply power and transmits to a main machine, and in real time, force application conditions at a main shaft of a lathe during critical states of the main shaft such as starting or stopping and during normal-speed rotation and variable-speed rotation. The invention modifies signal output techniques of conventional dynamometers and the structure of a stator plus a rotor, has advantages of a compact structure, a small volume, high rigidity, high intrinsic frequency, high sensitivity, etc., and achieves dynamic testing of four components including an axial force, a tangential force, a radial force, and a torque. An upper cutter handle structure of the upper dynamometer cover (1) is replaceable, and can have other structural forms, thereby providing replaceability.

Description

technical field [0001] The invention belongs to the technical field of piezoelectric sensing force measuring devices, and relates to a device for real-time measurement of axial force, radial force, tangential force and torque on a tool during milling, drilling and other machining processes by means of wireless transmission Devices and methods. Background technique [0002] The machine tool monitors the force on the spindle during the machining process, and can deal with the force on the spindle in time to avoid the phenomenon of spindle breakage, thereby improving the service life of the machine tool spindle. At present, there are mainly two types of measurement of cutting force in the process of machine tool processing at home and abroad: strain type and piezoelectric type. [0003] Strain type cutting force dynamometer mainly uses strain gauge as the main sensitive element, and measures the stress of the object under test through the principle that the strain gauge deform...

AI Technical Summary

Problems solved by technology

The traditional piezoelectric dynamometer used to measure the cutting force needs a signal line to transmit the signal generated by the piezoelectric induction to the charge amplifier. After the process of charge amplification, it is collected by the acquisition card and transmitted to the host computer, so it can only Installed between the workpiece and the workbench, usually these dynamometers are large in size and mass, which causes great inconvenience to installation and transportation.

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