Ultrasonic elliptical vibration extrusion device and vibration extrusion processing method for carrying out surface finishing of part by using same

Abstract

The invention discloses an ultrasonic elliptical vibration extrusion device and a vibration extrusion processing method for carrying out surface finishing of a part by using the same. The ultrasonic elliptical vibration extrusion device comprises an amplitude transformer, four excitation sources with the same structure and an extrusion tool, wherein the extrusion tool is arranged on the output section of the amplitude transformer; and the four excitation sources are respectively arranged in the four grooves of the excitation section of the amplitude transformer. In the vibration extrusion processing process, an extrusion head makes the ultrasonic vibration in an elliptic orbit relative to the processed surface of the part under the driving of the excitation sources through adjusting an extrusion contact angle between the part and the diamond extrusion head and the processing parameters of ultrasonic elliptical vibration extrusion device. On one hand, the device reduces an extrusion force by utilizing the pulse impact action of the ultrasonic vibration, and thereby, the extrusion process can be applied to thin-wall parts and long and thin parts; on the other hand, the front direct impact is avoided and the sliding friction of the extrusion head and the processed surface of the part is reduced even eliminated by utilizing the separation characteristic and the movement locus characteristic of the elliptical vibration, and thereby, the surface roughness of the processed surface of the part is reduced, and the service life of the extrusion head is prolonged.

Description

technical field [0001] The invention relates to an ultrasonic elliptical vibration extruding process suitable for ordinary lathes, boring machines and numerically controlled machine tools for strengthening and smoothing the inner and outer surfaces of parts. The dual-channel ultrasonic power supply is used to provide the excitation of the ultrasonic frequency of the ultrasonic transducer, so that the extrusion head moves on an elliptical track relative to the surface of the part, which greatly reduces the extrusion force and extrusion while completing the intensive finishing process of the part surface. The friction between the indenter and the part improves the service life of the extrusion head. Background technique [0002] Extrusion processing is a commonly used surface strengthening and finishing process. It is mostly used for internal and external surface processing of rotary parts. It is often used as the last machining process to affect the surface strength, stress s...

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Problems solved by technology

[0005] However, the ultrasonic one-way extrusion process has a pure impact effect, which makes the extrusion head receive an impact in each vibration cycle. Although this impact reduces friction, it makes the extrusion head easy to cause impact damage, so Extrusion head life extension is limited, and even in the case of improper vibration parameters, the life of the extrusion head can be severely shortened

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