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针对大型关节轴承实际挤压成形后出现内外圈间隙分布不均匀的缺陷,采用Abaqus软件对GEG60大型关节轴承的二次挤压成形过程进行数值模拟,分析了轴承外圈回弹量分布情况及其成形机理。根据初始设计方案的不足,提出减小模具收口半径及模具半径和在轴承外圈的腰部及两端增加突起两种改进方案。研究结果表明,两种改进方案使外圈的回弹量更加均匀,不仅有效地改善了初始模具设计中内外圈间隙分布不均的问题,而且明显地提高了轴承内外圈金属流动速度分布的均匀性和内外圈之间的接触应力的均匀性。
Aiming at the defects of uneven distribution of gap between inner and outer ring after the actual extrusion of large-scale joint bearing, Abaqus software was used to simulate the secondary extrusion process of GEG60 large-scale spherical plain bearing, and the distribution of springback in the outer ring of bearing Forming mechanism. According to the shortcomings of the initial design scheme, it is proposed to reduce the radius of the mold closing and the radius of the mold and to increase the protrusion at the waist and both ends of the bearing outer ring. The results show that the two improved schemes make the rebound amount of the outer ring more uniform, which not only effectively improves the uneven distribution of the inner and outer rings in the initial mold design, but also obviously increases the uniform distribution of metal flow velocity inside and outside the bearing The uniformity of contact stress between the inner and outer rings.