Fixed abrasive ultrasonic machining device and method

Abstract

The invention discloses a fixed abrasive ultrasonic machining device and method, belongs to the machining field of hard and brittle materials, and can be used for abnormal hole machining and plane grinding. The fixed abrasive ultrasonic machining device comprises an X-Y-axis feeding device, a working trough, a column of a main shaft, a fixed abrasive tool, a Z-axis servo feeding device and an ultrasonic wave generation system, wherein the ultrasonic wave generation system uses an ultrasonic constant current power supply; the ultrasonic constant current power supply comprises a collecting unit for collecting currents and voltages of two ends of an ultrasonic transducer and a processing unit for calculating equivalent impedance of an ultrasonic machining system; the processing unit which compares the calculated equivalent impedance with an impedance set value adjusts the feeding speed of the fixed abrasive tool and / or the output current of an ultrasonic wave generator. The fixed abrasive ultrasonic machining device disclosed by the invention not only is simple in structure and high in machining precision, but also is fast in response speed, and the stability of a fixed abrasive ultrasonic machining process is improved.

Description

technical field [0001] The invention belongs to the technical field of ultrasonic processing, and in particular relates to a consolidated abrasive ultrasonic processing device and method. Background technique [0002] Hard and brittle materials such as optical glass, ceramics, and silicon carbide have superior physical, chemical, and mechanical properties, and have been increasingly used in industrial fields such as aviation, electronics, automobiles, metallurgy, bioengineering, and national defense. Electrochemical machining and EDM are difficult to process non-conductive materials. Laser processing can cause cracks in high temperature resistant hard and brittle materials. Ultrasonic machining has been proven to be an effective method for forming hard and brittle materials. Ultrasonic machining is a process that applies ultrasonic vibrations higher than 20kHz in a certain direction on a tool or workpiece to achieve part forming. ), can realize special-shaped hole machining...

AI Technical Summary

Problems solved by technology

The disadvantages of this kind of processing are: the tool itself will wear; when processing deep and small holes, it is difficult for the abrasive suspension to enter the processing area, and the processing efficiency is low; the flow of the abrasive suspension will reduce the processing accuracy

However, the structure of the machine tool for detecting the processing force is relatively complex, and the response speed of the force measuring instrument is usually slow. In the process of large workpieces and micro-ultrasonic processing, the processing force is far smaller than the workpiece's own weight, and it is difficult to guarantee the detection accuracy of the processing force.

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