Press fitting device for shaft head and intermediate section of rear axle housing assembly of car

Abstract

The invention discloses a press fitting device for a shaft head and an intermediate section of a rear axle housing assembly of a car. The device comprises a lathe bed, a longitudinal sliding rail, a tray assembly, two pressing head assemblies, two hydraulic cylinders, two freezing systems and a heating system, wherein each pressing head assembly comprises a pressing head supporting seat and a sliding supporting seat; a pressing head and a positioning half ring are arranged on each pressing head supporting seat; a supporting half ring and a stroke fixing part are arranged at the upper part of each sliding supporting seat; the tray assembly comprises a lower tray, an upper tray, a supporting frame, two fixing brackets and four tray surface positioning blocks; positioning blocks are arranged on the fixing brackets; and a mandrel centering mechanism is arranged between the lower tray and the upper tray. With the adoption of the device, all press fitting technology processes of the shaft head can be performed; the operation is convenient; the press fitting efficiency is high; the accuracy is high; and the automation degree is high.

Description

technical field [0001] The invention belongs to the field of automobile parts manufacturing equipment, and in particular relates to a press-fitting equipment for 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 section, after welding...

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 Improve assembly efficiency, and the above-mentioned equipment does not have the function of cooling and heating the shaft head, and the automation is low

Therefore, if the shaft head needs to be cooled and then press-fitted, additional cooling equipment and heating equipment are required, which greatly increases the cost of the enterprise

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