A method for rolling and forming female rotor blanks of screw compressors

Abstract

The invention discloses a female rotor blank rolling method of a screw compressor, and belongs to the technical field of metal plastic forming. Identical wedge-shaped molds and spiral molds are respectively mounted on two rollers of a wedge cross rolling mill, and rotate in the same direction. Bars are driven by the rollers to reversely rotate; firstly, step shafts at two ends of a screw female rotor are formed by the wedge-shaped molds; then, middle spiral bodies are formed by the spiral molds; the forming of the step shafts at the two ends of the screw female rotor and the spiral bodies is finished in the process of rotating the rollers for one lap; and one or more screw compressor female rotor blanks can be produced through one lap of rotation of the rollers. A novel less-cutting and no-cutting plastic working process is used for forming the blanks approaching final shapes and having the spiral grooves and the step shafts, so that the production efficiency of screw rotors, the material utilization rate and the forming quality are improved.

Description

technical field [0001] The invention belongs to the technical field of metal plastic forming, and in particular provides a rolling forming method of a female rotor blank of a screw compressor. Background technique [0002] Relying on a series of unique advantages such as simple structure, low noise, high reliability, good dynamic balance, strong adaptability, energy saving and high efficiency, screw compressors have become the fastest-growing type of compressors in recent years and are widely used. Used in industrial fields such as air power, refrigeration and air conditioning, petrochemical industry, etc. However, the main part of the screw compressor, the screw female rotor tooth shape is complex and asymmetric, and its pitch is large, the helix angle is large, the tooth height radius is large, and the processing is difficult. At present, the main manufacturing process of the screw female rotor is to firstly use the casting process to produce a stepped cylindrical blank, ...

AI Technical Summary

Problems solved by technology

The existing technology has many processing steps, low production efficiency, long cycle and high energy consumption.

Especially for rough machining of spiral grooves, the cutting volume is large, the tool wears fast, and the material utilization rate is low, which is difficult to meet the development needs of green manufacturing and resource-saving society.

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