Process for forming spare billet of wheel rim without inner tube with constant strength variable cross-section

Abstract

The invention relates to a process for forming a spare billet of a wheel rim without an inner tube with a constant strength variable cross-section, which comprises the following step that a casting billet steel bar is processed into a spare billet through the working procedures of heating, punching, baiting, thermal ring rolling, sizing and spreading and scale removing. Because the process adopts the casting billet steel bar as a raw material, the cost is reduced. In the process of the thermal ring rolling, the cast structure of the casting billet steel is changed into a forge structure. The processing of sizing and spreading carried out afterwards not only can improve the spare billet precision of the wheel rim, but also can improve the strength of the wheel rim by 20 percent through cold machining. The wheel rim manufactured by the process has no welding lines, and a manufactured wheel does not have air leakage in the process of use, can be used as a wheel without an inner tube of a high-speed heavy-load transport vehicle and has the advantages of safety, reliability, low oil consumption, and the like. Used heating equipment, punching equipment, ring rolling equipment and sizing and spreading equipment can all be selected from home equipment. The process for forming a spare billet of a wheel rim without an inner tube with a constant strength variable cross-section has less investment and low production cost.

Description

technical field [0001] The invention relates to a manufacturing technology of a tubeless steel wheel of a truck, and a blank forming process of a wheel rim with variable cross-section and equal strength for a tubeless tire. Background technique [0002] Steel wheels are the wheels that are widely used in automobiles, especially on trucks. Steel wheels generally consist of two parts, the spokes and the rim, which are manufactured separately and then welded together. The rim is the carrier part of the tire, and the spokes are the connecting parts between the wheel and the car. At present, the billet preparation process for large-scale production of wheel rims at home and abroad can be summed up in the following two schemes: 1. Use steel strips to roll into section steel, and then roll and weld the blanks to prepare blanks; Blank. The rims manufactured by these two schemes are welded with section steel or strip steel, and there is a through weld on the rim. It is difficult ...

AI Technical Summary

Problems solved by technology

It is difficult to ensure that the welded seam on the rim does not leak air under frequent alternating stresses during use of the wheel manufactured with such a welded rim

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