Piezoelectric type ultrasonic rotary main shaft device

Abstract

The invention relates to a piezoelectric type ultrasonic rotary main shaft device, which is provided with a main shaft, a shaft housing, an amplitude transformer, a transducer and a current-collecting device and is characterized in that the main shaft is internal and external composite axes; the external shaft is a hollow shaft and is provided with a supporting bearing; the supporting bearing is compressed and fixed by a front bearing flange and a back bearing flange between the external shaft and the shaft housing; a positioning spacer and a sleeve are arranged between each bearing; the amplitude transformer is provided with a flange part which is connected with the end socket of the external shaft by a flange and a bolt; only the flange at the wave node of the amplitude transformer is connected with the external shaft; the middle part of the external shaft is provided with a drive gear which transfers rotary power. High-frequency vibration signals generated by a supersonic generator provided by the exterior are transferred to the transducer by the current-collecting device of rotary motion; the axial supersonic vibration generated by the piezoelectric chip of the transducer is amplified by the amplitude transformer, and then acts on a tool head. The main shaft device has simple and compact structure, is easy to assemble and maintain, has high ultrasonic energy transmission efficiency, and can process parts with larger size.

Description

technical field [0001] The invention belongs to the technical field of material processing, and mainly relates to a piezoelectric ultrasonic rotating spindle device used on a milling machine. Background technique [0002] The demand for highly stressed parts is now growing all the time and is even more important in medical technology, the optics industry, the automotive industry and many other industries. Most of these high-stress parts use hard and brittle new materials with excellent properties such as light weight, corrosion resistance, high temperature resistance and wear resistance. For hard and brittle new materials, traditional metal cutting is used, such as processing with diamond tools on a grinding machine. The wear of the tool is very serious, that is, a corresponding special machine tool is required, and the processing cost is very high. Ultrasonic machining is an ideal processing method for hard and brittle materials. Compared with the traditional processing m...

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Problems solved by technology

The design problem of the armature in this transmission method cannot be well solved, so that the energy is lost in the transmission process, and it is unstable

Therefore, it can only meet the processing of some small parts, but it cannot be applied to relatively large parts.

[0004] The main shortcomings of the existing CNC milling machine rotary ultrasonic spindle device are complex structure, difficult maintenance and assembly, high processing cost, low ultrasonic energy transmission efficiency, and low equipment processing efficiency. Therefore, it has not been widely used in actual production.

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