A chemical mechanical polishing method and polishing device for an integral impeller

Abstract

The invention discloses an integral impeller chemical and mechanical polishing method and a polishing device. According to the method, a chemical reagent is adopted to be mixed with an abrasive material to form polishing liquid; integral impellers are fully immersed in the polishing liquid, and the integral impellers are driven by a motor to rotate; and precision polishing of various parts of the surfaces of the integral impellers is performed under the joint actions of chemical corrosion softening by the polishing liquid and mechanical scraping removal. The polishing device includes the motor, a bolt, a coupling, a mounting plate, a supporting positioning plate, a connecting piece, a base, a container and plastic foam. The polishing method can be applied to polishing of various parts of the outer surfaces of integral impellers in various sizes and specifications, the versatility is high, the polishing efficiency is high, and the overall polishing quality is good; and the polishing device is simple in structure, easy to manufacture, convenient to operate, stable, reliable and low in cost.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing, and in particular relates to a chemical mechanical polishing method and polishing device for an integral impeller. Background technique [0002] The impeller is a key component of power machinery such as turbo engines and turbochargers. Compared with the traditional combined impeller, the new-generation integral impeller is characterized by the design and manufacture of a single blade and a disc as a whole, so that it has a compact structure and high strength. High, long service life and large thrust-to-weight ratio are widely used in aerospace, energy power, ships and other fields. [0003] At present, the processing methods of integral impellers at home and abroad include: precision forging, multi-axis CNC milling, electrolytic machining, abrasive flow machining, and manual polishing. Among them, precision forging manufacturing is a manufacturing process for the production of lar...

AI Technical Summary

Problems solved by technology

Among them, precision forging manufacturing is a manufacturing process for the production of large quantities of impellers. This process requires high equipment manufacturing accuracy, high manufacturing costs for abrasive tools, and poor versatility. It is generally used for the blank manufacturing of impellers; multi-axis CNC milling processing is At present, the most widely used processing method can realize the rough and finish machining of the impeller, but this processing method has high requirements on the rigidity of machine tools, tools, and fixtures, and it is necessary to write a special processing program. For impellers with small blade spacing Tool interference is easy to occur, the surface processing quality is average, and the roughness Ra≥1.6μm; electrolytic machining is usually used for the finishing of the overall impeller, and special electrodes need to be designed for different blades, and the early manufacturing and subsequent correction are difficult; abrasive flow polishing The processing is aimed at the fine polishing of the overall impeller. This process has very high requirements on equipment and high processing costs. There are many parameters that need to be controlled during the processing, such as pressure and cycle times; manual polishing is to improve the surface finish of the overall impeller. At present, most Enterprises still adopt this method, but manual polishing has low efficiency, high cost, poor consistency of blade surface accuracy, and is harmful to the health of operators

[0004] To sum up, the main problems existing in the overall impeller processing at home and abroad are: difficulty in manufacturing processing equipment, poor versatility, high cost, low processing efficiency, and poor overall processing quality

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