Device and method for rolling forming of spindle nose of vehicle axle of semi-trailer difficult to form

Abstract

The invention discloses a device and method for rolling forming of a spindle nose of a vehicle axle of a semi-trailer difficult to form, and belongs to the technical field of steel pipe hot-diameter shrinkage forming. According to the device and method for rolling forming of the spindle nose of the vehicle axle of the semi-trailer difficult to form, on the basis of the prior art, due to the fact that a roller axial position is adjusted during rolling, the number of deformed areas in a roller cavity is reduced, loads of pushing a roller are reduced, instability and deformation caused by oversized hollow shaft blank stress outside the roller cavity are prevented, and therefore primary rolling forming can be conducted on the spindle nose difficult to form. The key of online adjustment of the roller axial position is that two ends of the roller are provided with bearings capable of moving axially, a hydraulic mechanism is arranged on a non-feeding side shaft end, one end of the hydraulic mechanism is arranged on a bearing seat, and the other end of the hydraulic mechanism is arranged on a boss fixedly connected with a roller shaft. The device and method for rolling forming of the spindle nose of the vehicle axle of the semi-trailer difficult to form not only can carry out forming of an ordinary spindle nose, but also can achieve primary rolling forming of the spindle nose difficult to form, and therefore cost increase caused by secondary rolling is avoided.

Description

Technical field [0001] The invention belongs to the technical field of steel pipe heat shrinkage forming, and in particular relates to a rolling forming device and method for an integral hollow semi-trailer axle head. Background technique [0002] Currently, semi-trailer axles are generally integral hollow axles made of seamless steel tubes. Both ends of the axle are generally formed by cross rolling or extrusion. When forming complex and difficult-to-form shaft heads, due to the large shrinkage or thickening of the end of the shaft blank, it generally needs to be formed by secondary rolling or multiple extrusion. [0003] The semi-trailer axle cross-rolling forming generally adopts a device similar to that described in Patent 200920237583.4. Four rolls are symmetrically distributed in the circumferential direction of the tube blank, and the rolls are aligned axially, and the space between the four rolls forms a roll cavity. After the end of the shaft blank is heated to the rolli...

AI Technical Summary

Problems solved by technology

Double rolling not only requires an additional set of rolls and energy consumption for secondary heating, but also significantly reduces the output of the rolling mill

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