Method for radially rolling and forming ring piece with three steps and complicated section

Abstract

The invention relates to a method for radially rolling and forming a ring piece with three steps and a complicated section. The method includes sawing a cylindrical bar into a material section with a proper size, uniformly heating the material section so that the temperature of the material section is increased from the room temperature to the austenite temperature, keeping the austenite temperature of the material section for a certain period, performing rounding, heading and die forging for the material section to obtain a pre-forged piece with concave holes at two ends, finally piecing the middle of the pre-forged piece and punching a slug of the pre-forged piece to obtain an annular blank for rolling; feeding the blank into a furnace to heat the blank, taking out the blank from the furnace after the temperature of the blank reaches the target temperature and the target temperature of the blank is kept for a certain period, placing the blank into a closed hole pattern of a radial ring rolling mill to perform rolling and forming for the blank and repeatedly rotationally rolling the blank to enable to the blank to deform so as to obtain an annular forged piece with the specified shape, the specified size, three steps and a complicated section; and performing normalizing and tempering heat treatment for the forged piece to guarantee the mechanical property of the forged piece and finally cutting and processing the forged piece to form the finished ring piece. A near-net-shape precise forming mode is adopted, follow-up machining allowance is small, utilization rate of materials is high, forging heating number is reduced, energy consumption is saved, and the method has the advantages of high production efficiency and low cost.

Description

technical field [0001] The invention relates to a ring rolling forming method, in particular to a radial rolling forming method of a complex section ring with three steps. Background technique [0002] With the rapid development of my country's industry, the number of large and complex cross-section ring parts required by locomotives, large bearings, heavy motors, petrochemicals, machinery, wind power generation, marine engineering and other industries has increased sharply, and free forging, steel plate cutting or Production methods such as coil welding are far from meeting the needs of industrial development. In recent years, the method of rolling and rolling has been widely used to produce ring parts at home and abroad. It has high efficiency, saves materials, and is an advanced process method with less cutting and no cutting. At present, various countries in the world have conducted extensive research on the production and processing technology of ring parts. The size ra...

AI Technical Summary

Problems solved by technology

The main problems of this process for producing complex cross-section rings with steps are: (1) large machining allowance and low material utilization; (2) low production efficiency and high labor intensity; (3) ring rolling process There are too many medium fires, the forgings need to be heated repeatedly, and the energy consumption is high; (4) The ring rolling precision is low, the shape and size are difficult to guarantee, and the scrap rate is high; (5) The production cost is high

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