Thin electrode for electrolytic machining of integral wheel

Abstract

The invention relates to an electrolytically-processed slice electrode of an integral impeller and pertains to the field of electrolytic processing. The invention is characterized in that the slice electrode is a twisted profile and the twist extent is similar to a blade profile; one side of the slice electrode is a processing surface and the other side is a non-processing surface; the non-processing surface is coated with an insulation layer; wherein the thickness of the insulation layer varies along the axial direction of a cathode slice, the insulation layer close to the mounting end of the cathode slice is thicker and the coating layer close to the processing end is thinner; the slice electrode is vertically arranged on an electrode fixture. With twisted profile, the invention can process deformed and narrow impeller slots; the insulation layer with optimized thickness coated on the non-processing surface of the cathode prevents the secondary erosion on the non-processing surface and increases the intensity of the cathode slice, thus achieving the stable feeding of the cathode slice in the processing and ensuring smoothness and stability of a flow field in the processing area.

Description

technical field [0001] The invention relates to a sheet cathode for electrolytic processing of an integral impeller, belonging to the field of electrolytic processing. Background technique [0002] Electrolytic machining processes the workpiece based on the principle of anode dissolution. During the processing, the anode of the workpiece is connected to the positive pole of the power supply, and the cathode of the tool is connected to the negative pole of the power supply. During the passage, the anode workpiece gradually dissolves, thereby processing the workpiece into shape. Electrolytic machining has the advantages of no loss of tools, good surface quality, complex cavity, surface, and hole, and is not limited by the strength and hardness of materials. It has been widely used in aerospace, weapons, automobiles, medical equipment and other industries. widely used. Especially in the manufacturing process of the overall impeller and blade of aero-engine, with the developme...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems that the cathode has a narrow application range and poor versatility in impeller electrolytic machining, and that the electrode cannot be inserted into the narrow impeller channel with space distortion, it is impossible to process the blade profile, etc., the present invention proposes a new thin cathode, Its surface is twisted and complex, and it can enter the special-shaped and narrow impeller groove for precision electrolytic machining of blades; the non-processed surface of the cathode is coated with an insulating layer with optimized thickness to prevent secondary corrosion of the non-processed surface, and at the same time enhance the strength of the cathode sheet , realize the stable feeding of the cathode sheet during processing, and ensure the uniform and stable flow field in the processing area

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