Method for forging and molding inner rings of rolling-mill bearings

Abstract

The invention provides a method for forging and molding inner rings of rolling-mill bearings, which adopts a rolling-expanding mode to forge and mold in a heating-forging temperature range. The method comprises the following steps: feeding a material section into a gas generator and heating the material section to between 1,100 and 1,200 DEG C; taking out the material section from the gas generator and feeding the material section into an electric air hammer; upsetting and punching the heated material section on the electric air hammer; putting a clamp rod into a punched hole and putting the material section together with the clamp rod into a V-shaped clamp groove for forging and stretching so as to increase material density; opening width and finishing forging an inner ring rough of a rolling-mill bearing; conveying the inner ring rough of the rolling-mill bearing to a ring-rolling machine for reaming and rolling to reach the molding size of the inner ring rough of the rolling-mill bearing; and performing spray cooling on the inner ring rough which is rolled and reaches the size so as to finish forging and molding the inner ring of the rolling-mill bearing. The method has the advantages of high material utilization ratio, high production efficiency, low cost, noise reduction, environmental pollution reduction, little machining allowance and energy conservation.

Description

technical field [0001] The invention relates to a forging method of a bearing ring, in particular to a forging forming method of an inner ring of a rolling mill bearing. Background technique [0002] In the past, the processing method of the blank of the inner ring of the rolling mill bearing has a large weight and size. Most of the blanks are formed by high-temperature free forging and then transferred to mechanical processing. The efficiency is low, the processing amount of the blank is large and the material utilization rate is low, the coal consumption and electricity consumption per ton of forging are large, and the energy consumption is high, which leads to high production costs. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a forging method for the inner ring of rolling mill bearings with high material utilization rate, high production efficiency, low cost, reduced noise and environmental pollution, less...

AI Technical Summary

Problems solved by technology

[0002] In the past, the processing method of the blank of the inner ring of the rolling mill bearing has a large weight and size. Most of the blanks are formed by high-temperature free forging and then transferred to mechanical processing. Low efficiency, a large amount of reserved blank processing and low material utilization rate, large coal and electricity consumption per ton of forgings, high energy consumption, resulting in high production costs