Hot-rolled wheel and manufacturing method

Abstract

The invention relates to a hot-rolled wheel and a manufacturing method. The hot-rolled wheel comprises a hub, a spoke and a tread, wherein the spoke and the tread are formed to an integrated structure; and the hub and the spoke are welded as a whole. The manufacturing method comprises the steps of blank-rough machining-heat treatment-fine machining molding in sequence; and the blank is manufactured by the following procedures: (1) blanking: a steel plate having the same thickness with the spoke is selected to cut a center hub hole and a plate blank with annular outer circle; and a seamless steel pipe or a forging pipe having the same outer diameter with the hub is selected to cut a hub rough-machined part; (2) the annular plate blank is put on a special wheel hot rolling mill for hot spinning to mold a blank semi-finished part; and (3) the hub rough-machined part is welded in a center hub hole of the blank semi-finished part to form a blank finished part. The hot-rolled wheel, manufactured by the method, prevents the defects of cast blanks and forged blanks, saves the time, the labor and the materials in subsequent processing, and largely reduces the production cost.

Description

technical field [0001] The invention relates to a wheel and a manufacturing method, in particular to a hot-rolled wheel and a manufacturing method used in low-speed light rail transportation or traffic, hoisting, and transportation machinery industries. Background technique [0002] At present, wheels used in low-speed light rail transportation or transportation and lifting and transportation machinery industries, when the diameter is greater than 350mm, are mostly manufactured in the form of casting or forging. Wheels produced by casting generally have rough internal structures and often have shrinkage. Casting defects such as pores, slag inclusions, rough casting appearance, and some processes are difficult to accurately control, resulting in unstable casting quality, high scrap rate, polluting the environment, and high energy consumption; wheels produced by forging and pressing are prone to cracks, and For the large-scale wheel forging used in the hoisting machinery indus...

AI Technical Summary

Problems solved by technology

[0002] At present, wheels used in low-speed light rail transportation or transportation and lifting and transportation machinery industries, when the diameter is greater than 350mm, are mostly manufactured in the form of casting or forging. Wheels produced by casting generally have rough internal structures and often have shrinkage. Casting defects such as air holes, slag inclusions, rough casting appearance, and some processes are difficult to accurately control, resulting in unstable casting quality, high scrap rate, polluting the environment, and high energy consumption; wheels produced by forging and pressing are prone to cracks, and For the forging and pressing of large wheels used in the hoisting machinery industry, the power of the forging equipment is high, and the subsequent processing of the wheel after forging and pressing is large, which not only wastes a lot of materials, but also has a long production cycle, which increases the production cost.

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