Longitudinal torsion composite supersonic vibration machining device

Abstract

The invention discloses a longitudinal torsion composite supersonic vibration machining device. The longitudinal torsion composite supersonic vibration machining device comprises a longitudinal supersonic vibration energy converter and an ultrasonic amplitude transformer arranged at the front end of the longitudinal supersonic vibration energy converter and integrally connected with the longitudinal supersonic vibration energy converter. The longitudinal supersonic vibration energy converter comprises a back cover plate, a piezoelectric ceramic piece, an electrode plate, a front cover plate, an insulating sleeve and a pre-tightening bolt for connecting the back cover plate, the piezoelectric ceramic piece, the electrode plate, the front cover plate and the insulating sleeve. The ultrasonic amplitude transformer comprises an amplitude transformer index section and an amplitude transformer cylindrical section, the amplitude transformer index section and the front cover plate are designed into a whole, the amplitude transformer cylindrical section is used for being connected with a machining tool, the surface of the amplitude transformer index section is provided with four same spiral grooves, part of longitudinal vibration generated by the longitudinal supersonic vibration energy converter can be converted into torsion vibration through the spiral grooves, and therefore the longitudinal torsion composite supersonic vibration can be generated one the end face of the amplitude transformer cylindrical section. The longitudinal torsion composite supersonic vibration machining device has the advantages of being simple in structure, large in torsion component, high in converting efficiency and the like.

Description

technical field [0001] The invention relates to the technical field of mechanical processing, in particular to a longitudinal-torsion compound ultrasonic vibration processing device. Background technique [0002] In recent years, some new hard and brittle composite materials such as C / SiC and C / C have been used more and more in aerospace, automobile, energy and other fields, but these hard and brittle composite materials are not as easy to process as traditional materials. Traditional mechanical processing methods are prone to defects such as fiber tearing, delamination, and burrs, and the tool wear is severe and the efficiency is low. Ultrasonic vibration processing technology is considered to be one of the most suitable methods for processing hard and brittle composite materials. It is in the traditional Based on the relative movement of the workpiece and the tool in machining, ultrasonic vibration is applied to the workpiece or the tool to obtain better processing perform...

AI Technical Summary

Problems solved by technology

However, due to the technical difficulty in realizing tangentially polarized piezoelectric ceramics, the application of longitudinal-torsional composite ultrasonic vibration is limited.

At present, there are mainly two methods to realize longitudinal-torsional composite ultrasonic vibration. One is to polarize the piezoelectric ceramic along the tangential direction, but it is technically difficult to achieve. The usual method is to first cut the piezoelectric ceramic sheet into several fan-shaped sheets, Separately tangentially polarize each sector-shaped piezoelectric ceramic sheet, and then bond each sector-shaped piezoelectric ceramic sheet together. This method is complex in process, high in scrap rate, and prone to incomplete polarization of the ceramic sheet, electrical breakdown, etc. The problem is that it is difficult to manufacture an ideal transducer; the second is that in recent years, the use of a torsional vibration module connected to the front end of the transducer to achieve torsional vibration, such as patent CN200710009459.8, uses the method of opening a chute at the end of the horn To achieve torsional vibration, although a certain effect has been achieved, the torsional vibration component of this method is small, and the advantages of longitudinal-torsional composite ultrasonic vibration cannot be fully utilized, and the processing efficiency is low, which limits the processing effect

However, although the giant magnetostrictive longitudinal-torsional composite vibration ultrasonic transducer described in the patent CN103203312A has realized the longitudinal-torsional composite ultrasonic vibration, the energy conversion efficiency is low and the device is complicated.

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