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

A technology of bearing inner ring and forging molding, applied in the field of forging of bearing rings, can solve the problems of high production cost, low production efficiency, harsh working environment, etc., to reduce noise and smoke pollution, reduce forging time, and save electricity. energy effect

Inactive Publication Date: 2009-11-04
瓦房店世强轴承制造有限公司
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  • Summary
  • Abstract
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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

Method used

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Examples

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Embodiment Construction

[0011] The forging forming method of the inner ring of the rolling mill bearing, the size of the finished inner ring in this example: the outer diameter is 312mm, the inner diameter is 280mm, and the height is 220mm. Blank size: outer diameter 317 +2 mm, inner diameter 274 -2 mm, height 230 +2 mm. Blanking 39.5kg, material core weight 0.3kg, fire consumption 1.5kg, forging weight 37.7kg, bearing inner ring processing method:

[0012] 1. Send the material section into the gas generator and heat it to 1100°C;

[0013] 2. Put the material section out of the furnace into a 750kg electric air hammer, pier the heated material section on the 750kg electric air hammer, and then use a Φ90mm thick and 270mm long clamping rod to put it into the punching hole together with the clamping rod The inner ring of the V-shaped clamp groove is forged and drawn to increase the density of the material. After the drawn length is 243-238mm, the flat width is 235mm. It takes 30 seconds from the di...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00B21H1/12B21J5/06B21K1/04
Inventor 周世强
Owner 瓦房店世强轴承制造有限公司
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