Single-excitation ultrasonic elliptical vibration micro-machining work platform

Abstract

The invention discloses a single-excitation ultrasonic elliptical vibration micro-machining work platform. The single-excitation ultrasonic elliptical vibration micro-machining work platform comprises a vibration isolation platform, a transverse moving work platform, a longitudinal moving work platform, a shell unit, an ultrasonic vibration transducer, an ultrasonic wave power supply, an elliptical vibration mode converter and a small work platform, wherein the ultrasonic vibration transducer is placed in the shell unit; the small work platform is arranged at the front end of the elliptical vibration mode converter; the shell unit comprises a front baffle, a sleeve and a rear baffle; the ultrasonic vibration transducer comprises a bolt, a rear cover plate, a piezoelectric ceramic piece, an electrode plate and a front cover plate; the rear cover plate, the piezoelectric ceramic piece, the electrode plate and the front cover plate sequentially sleeve the bolt; the rear cover plate, the piezoelectric ceramic piece, the electrode plate and the front cover plate are connected to one another and are tightly pressed together via the bolt; the elliptical vibration mode converter is arranged at the front end of the front cover and has a wedge-shaped structure; and longitudinal ultrasonic vibration generated by the ultrasonic vibration transducer can be converted into longitudinal and bent composite ultrasonic elliptical vibration at the tail end of the elliptical vibration mode converter and on the small work platform by the elliptical vibration mode converter, so that workpieces on the small work platform can be driven to perform ultrasonic elliptical vibration.

Description

technical field [0001] The invention relates to the technical field of micromachining of hard, brittle and difficult-to-machine materials, and in particular relates to a micromachining working platform for auxiliary machining by using single-excited ultrasonic elliptical vibration. Background technique [0002] The high-efficiency, high-quality and high-reliability machining of hard, brittle and difficult-to-machine materials is still a difficult problem in the world. The typical characteristics of hard and brittle materials are high brittleness, low fracture toughness, and the elastic limit is very close to the strength. During processing, when the load on the material exceeds the elastic limit, fracture damage will occur, and cracks and pits will be formed on the processed surface. Serious Affect its surface quality, processing efficiency and material reliability. In order to solve the processing problems of such materials, the manufacturing fields of various countries ha...

AI Technical Summary

Problems solved by technology

In 2007, Zhao Bo et al. proposed a two-dimensional ultrasonic vibration auxiliary processing device for processing large structural parts, which applied ultrasonic vibrations in two directions to the workpiece through two generators respectively. Many aspects have shown excellent performance, but this technology has the phenomenon that the vibration velocity is unstable when the load, temperature and cutting conditions change during processing, and the instability of the vibration velocity will lead to the resonance frequency drift and vibration in ultrasonic machining. There are a series of problems such as reduced amplitude, reduced processing efficiency, and unstable processing quality, and the adjustment of its resonance state involves the matching of two ultrasonic generators and transducers with the workpiece, which is difficult to implement

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