Rotary ultrasonic-assisted fine electrolytic grinding and broaching device and method

Abstract

The invention provides a rotary ultrasonic-assisted fine electrolytic grinding and broaching device and method. According to the rotary ultrasonic-assisted fine electrolytic grinding and broaching device and method, on the basis that a pre-formed hole is obtained through electrolytic drilling and grinding by a fine electrolytic machine tool, online tool-changing operation is conducted on the machine tool to avoid positioning errors, axial ultrasonic vibration is applied to a rotary spindle of the machine tool, and electrolytic grinding and broaching are conducted on the pre-formed hole througha high-frequency pulse power supply. An electrolyte is disturbed through the cavatition and enhanced mass transfer effect of ultrasonic vibration to promote separated-out gas and other electrolytic products in a machining area to be discharged in time, so that the gas flow field and the gap electric field are more uniform, and the machining efficiency, the repeated machining precision and the surface machining quality are improved. Slight removal of workpieces is achieved through the high-frequency pulse power supply, so that the machining locality and the dimension controllability are improved, and precise adjustment of matching between electrolytic machining and mechanical grinding is facilitated. By adoption of the rotary ultrasonic-assisted fine electrolytic grinding and broaching device and method, the small hole machining precision and the surface machining quality are improved while the machining efficiency is ensured.

Description

technical field [0001] The invention belongs to the technical field of electrolytic grinding composite processing, and in particular relates to a rotary ultrasonic-assisted micro electrolytic grinding hole reaming processing device and method. Background technique [0002] The small hole structure is widely used in many engineering fields, such as 3D printer nozzles, engine fuel nozzles, air film cooling holes in aeroengine blades, special-shaped holes on chemical fiber spinnerets, and small holes on instruments and meters. The surface quality of the hole wall often determines the quality and performance of small hole parts, so the demand for ultra-precision machining of small holes is becoming more and more urgent. [0003] Electrolytic grinding composite processing has the advantages of high surface processing quality and processing accuracy in many small hole processing methods. The Chinese invention patent with the publication number "CN 103447640A" discloses an electrol...

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Problems solved by technology

[0003] Electrolytic grinding composite processing has the advantages of high surface processing quality and processing accuracy in many small hole processing methods. The Chinese invention patent with the publication number "CN 103447640A" discloses an electrolytic grinding device that realizes rotating liquid and its working method, electrolytic grinding can be performed on parts with inner holes and inner cavities, but the surface processing quality and machining accuracy of the small holes still cannot meet the needs of some fine workpieces or ultra-precision machining

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