Ultrasonic-plasma electrolytic composite processing method and processing device for workpiece

Abstract

The application discloses an ultrasonic-plasma electrolytic composite processing method and a processing device for workpieces. The processing method comprises the following steps: providing electrolyte solution between the non-metallic layer and the tool electrode; connecting the metal layer to the positive pole of the electrolytic machining power supply, connecting the tool electrode to the negative pole of the electrolytic machining power supply, and applying a DC voltage between the metal layer and the tool electrode; The tool electrode is moved relative to the non-metal layer from the side of the non-metal layer away from the metal layer, and the ultrasonic wave is guided to the non-metal layer. In the above method, the surface of the non-metallic layer is firstly processed by ultrasonic waves guided to the non-metallic layer. During the ultrasonic processing, the induced plasma can promote the circulation of the ultrasonic processing solution, so that the ultrasonic processing products can be quickly discharged from the processing area. After the non-metallic layer is processed, the metal layer is exposed, so that the metal layer is processed in parallel by ultrasonic electrolysis.

Description

technical field [0001] The present application relates to the technical field of material processing, in particular to an ultrasonic-plasma electrolytic composite processing method and processing device for workpieces. Background technique [0002] With the development of aviation and aerospace technology, the operating temperature requirements of hot end components are getting higher and higher, which has reached the limit of the use of superalloys and single crystal materials. For example, the blades at the front and rear ends of the aero-engine combustor, the heated nozzles and impellers of the gas turbine, their working temperature reaches above 1000°C, which is close to or exceeds the limit service temperature of the base material (usually high-temperature nickel alloy, heat-resistant about 1075°C). In this extremely harsh high-temperature environment, the material is prone to high-temperature oxidation and thermal stress deformation, which affects the performance of th...

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Problems solved by technology

However, since nickel alloy materials with thermal barrier coatings are multilayer materials, although ultrasonic machining has good processing characteristics for ceramic-based thermal barrier coating parts, it is easy to cause free metal parts for metal-based parts with good toughness. Abrasives are bonded to the metal surface, reducing processing efficiency, so ultrasonic processing of nickel alloy materials with thermal barrier coatings also has certain limitations

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