A Constant Pressure Difference Intermittent Rotating Extrusion Abrasive Flow Polishing Device

Abstract

The invention relates to an efficient constant pressure difference intermittent rotating extrusion abrasive flow polishing device and belongs to the technical field of intermittent rotating extrusion abrasive flow automatic polishing of large-size complicated curved parts with higher uniformity requirements on surface quality. The abrasive flow polishing device is a rotating grinding and polishing device where a hydraulic motor drives a gear and is engaged with a negative clearance turntable bearing; sealing rings are mounted on junction surfaces to achieve static sealing of a high-pressure abrasive; dynamic sealing of the high-pressure abrasive is achieved by mounting quick-wear sealing rings at rotating friction parts for sealing and mounting special combined high-pressure abrasive sealing ring and high-pressure abrasive seals in places where pistons extrude the abrasive; and finally, intermittent rotation grinding and polishing of the high-pressure abrasive is achieved. The device solves the problems of excessive grinding and rounding in the traditional abrasive flow extrusion, and achieves aerodynamic performances and efficient precise uniform polishing of complicated curved surfaces such as impellers and blades with the higher surface uniformity requirements. The device can reduce surface roughness Ra of various complicated parts to below 0.8.

Description

technical field [0001] The invention relates to a constant pressure difference intermittent rotary extrusion abrasive flow polishing device, which belongs to the technical field of automatic polishing of intermittent rotary extrusion abrasive flow for large-scale complex curved surface parts requiring high uniformity in surface quality. Background technique [0002] Mechanical products with complex curved surfaces, such as aero-engine blisks, impellers, blades, thin-walled parts, pump valve bodies and elongated holes, need to be processed by ultra-finishing after grinding, milling, EDM or other special processing To achieve uniform, low roughness and smooth surface processing requirements on the surface of the workpiece to be processed. At present, enterprises mainly use whetstone or manual polishing process, while the traditional extrusion abrasive flow technology will produce "rounding" and "over-polishing", which greatly affects the uniformity of the product surface. Thi...

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