Sewage pump motor shaft friction welding method

Abstract

The invention discloses a sewage pump motor shaft friction welding method. Round steel 0Cr18Ni9Ti and round steel 42CrMo are sawn into sections through a sawing machine and the round steel 0Cr18Ni9Ti (1) is clamped in a rotation clamp of a friction welding machine; the outer circle of the round steel 42CrMo (2) is provided with a restraining sleeve (3), and the round steel 42CrMo is clamped in a moving clamp of the friction welding machine; the rotating speed is 1,110 rpm, the starting friction pressure ranges from 80 MPa to 90 MPa, friction welding is carried out for 1.2 seconds to 2.0 seconds, and the progressing speed is 1.5 mm / s; the rotating speed is 1,450 rpm, the progressing speed is 3.5 mm / s, the two-level friction pressure ranges from 160 MPa to 180 MPa, and the friction welding is carried out for 5 seconds to 7 seconds; the rotating speed is 1,300 rpm, the progressing speed is 3.5 mm / s, the three-level friction pressure ranges from 100 MPa to 120 MPa, and brake is started after friction welding is carried out for 7 seconds to 8 seconds; and at the same time, upsetting pressure of 240 MPa to 270 MPa is exerted, and the upsetting pressure is kept for 6 seconds to 8 seconds.

Description

technical field [0001] The invention relates to a friction welding method for a sewage pump motor shaft on a continuous drive friction welding machine. Background technique [0002] With the progress of society, the continuous improvement of living standards and the strengthening of environmental protection awareness, industrial wastewater and domestic sewage must be treated effectively before they can be discharged or recycled to achieve sustainable development. The motor shaft of the sewage pump extends into the sewage pump to become the pump shaft of the sewage pump. The motor shaft of the sewage pump and the pump shaft of the sewage pump are the same shaft. Corrosion, stainless steel 0Cr18Ni9Ti is usually used. In order to reduce the product cost, the motor shaft inside the sewage pump motor is usually made of alloy structural steel 42CrMo, and the two materials are welded together to make the sewage pump motor shaft. At present, the welding end surface of stainless ste...

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Problems solved by technology

[0003] In order to solve the problem that the stainless steel 0Cr18Ni9Ti cut by the sawing machine and the alloy structural steel 42CrMo cannot be directly welded, it is necessary to process the welding end face flat and process the welding groove, and use carbon dioxide gas shielded welding to weld the two materials into one to make the sewage pump motor shaft. The welding wire needs to be dried before welding, which increases the auxiliary working time, reduces the production efficiency, and increases the production cost; it is necessary to increase the mechanical processing equipment, arrange the processing procedures, and increase the welding parts transfer link, resulting in long manufacturing time, high production costs, and corporate benefits. Low; and there are pores, slag inclusions, coarse grains inside the weld, and intergranular corrosion is prone to occur. The weld strength of the sewage pump motor shaft is low, and it is easy to break from the weld, and the sewage pump motor shaft is scrapped in batches.

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