Bearing ring forging machining process and machining system

Abstract

The invention discloses a bearing ring forging machining process and machining system, and relates to the technical field of bearing ring forging machining. The process includes the following steps that firstly, a steel material section of a high-carbon chromium bearing is heated to 1130 DEG C to 1180 DEG C; secondly, the heated material section is forged in the axial direction, and a material section subjected to upsetting is obtained; thirdly, the material section subjected to upsetting is extruded so that the middle portion of the material section subjected to upsetting can be indented, theindented portion of the middle portion of the material section is punched through, and a material section subjected to axial punching is obtained; fourthly, ring rolling is conducted on the materialsection, subjected to axial punching, through a numerical control ring rolling machine, and a ring is obtained; fifthly, the ring is air-cooled for 6 min to 8 min to 600 DEG C or below; and sixthly, spheroidizing annealing is conducted on the air-cooled ring through a double-layer roller hearth type nitrogen protection annealing furnace. The machining system comprises a heating furnace, a punchingmachine, the numerical control ring rolling machine, an air cooling machine and the double-layer roller hearth type nitrogen protection annealing furnace. By means of the bearing ring forging machining process and machining system, the surface roughness degree of the bearing ring can be decreased, no decarburized layers are generated after spheroidizing annealing, and therefore the cutting machining allowance is reduced, steel is saved, and the raw material utilization rate is increased.

Description

technical field [0001] The invention relates to the technical field of forging processing of bearing rings, in particular to a forging processing technology of bearing rings and a processing system thereof. Background technique [0002] Bearings include rings, rolling elements, and cages. Most bearing rings use high-carbon chromium bearing steels with grades of GCr15, G8Cr15, GCr15SiMn, GCr15SiMo, GCr18Mo, and 100Cr6. During the forging process of existing bearing rings, due to Ordinary ring rolling machine has low processing precision, which makes the surface of the bearing ring rough, and the decarburization layer of the bearing ring is thickened due to the impure gas atmosphere in the annealing furnace, which increases the allowance for subsequent cutting and causes steel waste . Contents of the invention [0003] The present invention aims at the above-mentioned deficiencies in the prior art, and provides a low surface roughness, zero decarburization layer bearing rin...

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Problems solved by technology

[0002] Bearings include rings, rolling elements, and cages. Most bearing rings use high-carbon chromium bearing steels with grades of GCr15, G8Cr15, GCr15SiMn, GCr15SiMo, GCr18Mo, and 100Cr6. During the forging process of existing bearing rings, due to Ordinary ring rolling machine has low processing precision, which makes the surface of the bearing ring rough, and the decarburization layer of the bearing ring is thickened due to the impure gas atmosphere in the annealing furnace, which increases the allowance for subsequent cutting and causes steel waste

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