A method for press-fitting the shaft head and the middle section of the middle and rear axle housing assembly of the automobile

Abstract

The invention discloses a press mounting method for a shaft head and a middle section of an automobile middle and rear axle housing assembly. Automobile middle and rear axle housing assembly shaft head and middle section equipment is adopted for press mounting. The equipment comprises a lathe bed, longitudinal sliding rails, a tray assembly, two pressure head assemblies, two hydraulic cylinders, two refrigeration systems and a heating system; each pressure head assembly comprises a pressure head support and a sliding support; the pressure head supports are provided with pressure heads and positioning semi-rings; supporting semi-rings and fixed stroke components are arranged at the upper parts of the sliding supports; the tray assembly comprises a lower tray, an upper tray, a supporting frame, two fixing brackets and four disk surface positioning blocks; the fixing brackets are provided with positioning blocks; and a core rod centering mechanism is arranged between the lower tray and the upper tray. According to the press mounting method for the shaft head by using the equipment, the finished shaft head and the finished shaft section can be connected without subsequent machining, and the press mounting method has the advantages of no serious thermal deformation or harmful flue gas, and good press mounting quality.

Description

technical field [0001] The invention belongs to the field of manufacturing and assembling technology of automobile parts, and in particular relates to a method for press-fitting the axle head and the middle section of the middle and rear axle housing assembly of the automobile. Background technique [0002] The shaft head of the rear axle housing assembly of the automobile is the main load-bearing part of the automobile. The rear axle housing assembly of the automobile at home and abroad is generally connected to the middle section of the axle housing by electron beam welding, friction welding or electromagnetic induction heating and pressing. . When the shaft head and the middle section assembly are connected by welding, due to many factors affecting the welding quality, it is difficult to monitor and monitor the welding quality, and welding deformation will occur during the welding process, so only semi-finished shaft heads can be used And the welding of the middle sectio...

AI Technical Summary

Problems solved by technology

However, the press-fitting method adopted by this equipment is a fixed press-fitting method, and the middle section of the axle housing needs to be clamped and fixed on the fixture. The flange and the middle section of the axle housing have good concentricity, otherwise it will be difficult to press the workpiece accurately, and even if the press-fit is completed, a large assembly stress will be generated, so the equipment cannot realize automatic centering, and the operation of the assembler very high level

At the same time, the distance between the flange and the center of the middle section of the axle housing is adjusted by the limit plate and guaranteed by controlling the stroke of the oil cylinder. Therefore, the press-fit accuracy must be calculated in advance during press-fitting, and the equipment must be adjusted, resulting in cumbersome procedures during use and reduced assembly efficiency

[0004] In summary, the equipment and process in the prior art have low press-fit efficiency, poor press-fit quality, high requirements for equipment, and easy waste of resources and increased costs

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