Rotary Die Extrusion Process of Screw Pump Rotor

A technology of extrusion molding and screw pump, which is applied in the field of screw pump rotor rotary die extrusion molding technology, can solve the problems of very strict softening annealing and cooling process requirements, difficulty in turning the outer circle, and reduction of spheroidized cores, etc., to achieve improved resistance Scaling performance, reduction of metal surface oxide generation, reduction of material loss effect
CN112518239BActive Publication Date: 2022-02-08ZHEJIANG OCEAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZHEJIANG OCEAN UNIV
Publication Date
2022-02-08

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Abstract

The invention relates to the technical field of screw pumps, in particular to a rotary-die extrusion molding process for a screw pump rotor. The invention provides a screw pump rotor rotary die extrusion molding process, comprising: performing isothermal spheroidization annealing on the metal blank, and ultrasonically treating the metal blank for 8-30 seconds before annealing; turning the outer circle of the annealed metal blank, Then sandblasting and shot blasting treatment, the metal blank is placed in saponified oil and soaked for 10-30 minutes, and lubricated, wherein the saponified oil contains 0.5-8% nano-silicon carbide, and the nano-silicon carbide has a particle size of 20-60nm , 140-200nm nano-silicon carbide mixture, the mixing weight ratio is 1:2.8-4; at room temperature, put the lubricated metal billet into the extrusion cylinder for rotary extrusion molding to obtain the finished product.
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Description

technical field

[0001] The invention relates to the technical field of screw pumps, in particular to a rotary-die extrusion molding process for a screw pump rotor. Background technique

[0002] The screw pump is a rotary pump that relies on the volume change and movement of the meshing space formed by the pump body and the screw to deliver or pressurize the liquid. It has the characteristics of stable delivery medium, low turbulence of the discharge medium, weak pressure pulsation, small mechanical vibration, and low noise. Low, self-priming performance, good suction performance, high speed working ability, insensitive to the viscosity of the medium, simple and compact structure, small size, light weight, high efficiency, reliable work, long life, easy operation and easy maintenance. Therefore, the screw pump is widely used in the following four aspects: conveying liquid; realizing multi-phase mixed transportation of liquid, gas and solid; conveying viscous medium with extr...

Claims

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