Electrolysis machining process method and tool fixture of equal-thickness arc-shaped end face impeller

Abstract

The invention discloses an electrolysis machining process method and tool fixture of an equal-thickness arc-shaped end face impeller and belongs to the technical field of electrolysis machining. According to the electrolysis machining method, cathode blocks with the number being the same as that of blades are adopted and uniformly distributed along the center of the impeller, rapid feeding is performed in the axial direction of the impeller when machining is performed, and one-time machining and forming of the thin-wall blades and an arc-shaped end face base body of the overall impeller can be completed. Nearly-forming hook face radians at the bottom ends of the cathode blocks for machining are large, arc-shaped curved lines where the included angle theta i=30 degrees is located serve as boundaries to divide different areas, linear interpolation finishing is performed according to actual machining experience and machining results, and requirements for the normal direction and lateral balance can be met simultaneously. By means of the electrolysis machining method, one-time machining and forming of the overall impeller can be achieved, machining efficiency is improved, and high practical value is achieved.

Description

technical field [0001] The invention belongs to the technical field of numerical control electrolytic machining, and in particular relates to an electrolytic machining process and a tooling fixture for equal-thickness arc-shaped end face impellers. Background technique [0002] Curved end impellers are widely used in aero-engines and aero-borne equipment. This type of impeller mainly works under the conditions of high temperature, high pressure and high speed, and adopts difficult-to-cut materials such as stainless steel, high-temperature heat-resistant alloys and titanium alloys. The overall structure of the impeller is complex, the blades are thin, the space between the blades is small, and the precision requirements are high, making its processing and manufacturing very difficult, which has become a technical difficulty in aviation manufacturing. [0003] At present, such integral impeller processing methods mainly include CNC milling, precision die forging, electric dis...

AI Technical Summary

Problems solved by technology

However, nesting-type electrolytic machining needs to process each blade one by one, and the processing efficiency is low; moreover, in order to ensure a uniform flow field during processing, there will be a wedge-shaped margin between each adjacent blade, and the wedge-shaped margin will be removed. It is easy to cause secondary processing to the processed matrix surface

At present, there is no electrolytic machining technology that can not only process multiple blades at the same time, but also complete the one-time forming of the curved surface of the impeller.

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