Polishing method for rotating abrasive stream of entire impeller part

Abstract

The invention discloses a polishing method for rotating an abrasive stream of an entire impeller part. The polishing method is characterized by comprising the following steps of: firstly, protecting non-polished faces, such as upper and lower end faces of an impeller and outer edges of blades, by virtue of a special shape clamp cover, and integrally fixing with a workpiece; secondly, properly buffering and adjusting before the workpiece is polished by abrasive through an abrasive stream drainage device, so that a pressure field in a sealing cavity is uniformly distributed; thirdly, driving an equipment spindle and the workpiece to rotate by using a power system consisting of a motor and a speed reducer; and finally, converting to a high-pressure water cleaning system to wash the workpiece and an equipment pipeline after polishing. According to the polishing method provided by the invention, the problems in a polishing process of the entire impeller part of easiness of interference, excessive polished blades, chamfering, dead angle and uniform polishing can be solved; the abrasive circularly flows in double directions so as to be easy to recycle; the machining efficiency is improved; and clean-in and clean-out in a machining process can be realized through the water washing system after the polishing process.

Description

technical field [0001] The invention relates to a polishing process method, in particular to an automatic polishing process method for rotary parts such as an integral impeller or a blisk, which cleans in and out with a rotating abrasive flow. The invention relates to a rotary abrasive flow polishing method for rotary parts such as integral impellers or blisks, which mainly includes: a material / liquid supply system capable of realizing timing and bidirectional supply and controlling abrasive flow and cleaning liquid, which can rotate forward and reverse at the same speed Adjustable spindle system and device body, as well as a clamp cover that clamps the impeller to form a sealed cavity and protects the non-polished edge and the upper and lower edges, as well as the flow guide structure that guides the abrasive, etc. Background technique [0002] Rotary parts such as integral impellers and blisks in mechanical products such as aero-engines and compressors need to be polished ...

AI Technical Summary

Problems solved by technology

At present, enterprises mainly use manual polishing process. It takes a long time to polish a part, and the polishing texture is chaotic and irregular, which leads to high labor intensity and serious environmental pollution.

The main difficulties in the processing of such parts are: (1) the parts to be processed are mostly complex curved surface structures; (2) the materials to be processed are mostly high-temperature alloys, titanium alloys, stainless steel and other difficult-to-machine materials; (3) the surface roughness of the processing The requirements are high, and the surface roughness after polishing should be below Ra0.8

[0003] The use of abrasive flow technology to polish the surface of special-shaped inner cavity parts such as pipes is a good process method. However, the current abrasive flow technology mainly uses single-pass polishing for complex parts such as integral impellers, blisks and other rotary parts. Single-out one-way abrasive flow processing method; for the polishing of simple parts, such as pipes, bearing rings, cylinders and other smooth inner wall surfaces, repeated polishing can be achieved, mainly because the parts are simple, the fluid control is convenient, and The fluid can flow through the inner wall surface evenly, but for parts with complex surfaces, the pressure field in the polishing area is not uniform due to the difficulty of controlling the fluid abrasive and the inhomogeneity of the abrasive flow into the flow channel of each blade (cascade). , which in turn leads to uneven processing quality or local over-polishing. For the one-way abrasive flow processing method with one-in and one-out, the abrasive is not easy to recycle, the processing efficiency is low, and the surface of the part after polishing needs to be cleaned.

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