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采用有限元分析软件Deform对汽车半轴热摆辗成形过程进行分析,重点研究了热辗压成形过程中等效应力分布及变化规律。研究结果表明:在成形过程中,工件最大变形程度出现在半轴的法兰区域,且在成形过程中逐渐向底部移动,最大等效应力从开始阶段的193 MPa增加到成形结束时的302 MPa;此外,摩擦系数从0.1增加到0.5时,最大等效应力从235 MPa增加到304 MPa。并通过实验验证了模具下模表面涂抹Mo S2或者机油润滑剂,可以有效减小工件变形程度。
The finite element analysis software Deform is used to analyze the hot roller forming process of the semi-axle of a car. The stress distribution and variation regularity during the hot rolling process are mainly studied. The results show that during the forming process, the maximum deformation of the workpiece occurs in the flange area of the semi-shaft and gradually moves to the bottom during the forming process. The maximum equivalent stress increases from 193 MPa at the initial stage to 302 MPa at the end of forming In addition, when the friction coefficient increases from 0.1 to 0.5, the maximum equivalent stress increases from 235 MPa to 304 MPa. Experiments show that Mo S2 or oil lubricant can be applied to the surface of the die, which can effectively reduce the deformation of the workpiece.