无芯棒旋锻毛坯直径与壁厚比值的临界值的研究

Research on the Critical Value of the Ratio of Diameter to Wall Thickness of Blank Forging without Mandrel

摘要: 以旋锻毛坯为研究对象，采用无芯棒旋锻工艺，针对旋锻毛坯不同径厚比(毛坯直径与壁厚的比值)分别通过DEFORM-3D进行旋锻成型过程仿真，在给定的工艺进给参数下，研究不同径厚比下，毛坯旋锻过程中毛坯变形情况。将通过仿真得到的毛坯变形情况数据进行后处理，从而得到其旋锻过程中的应力值，进而最终得到不同径厚比下的毛坯的应力值，再与理论计算值比较，进而得出毛坯发生失稳或屈服时的临界值，为进一步提高产品成形质量的研究奠定基础。

Abstract: Taking the rotary forging blank as the research object, the coreless rotary forging process is adopted, and the rotary forging process is simulated by DEFORM-3D for different diameter-to-thickness ratios (ratio of blank diameter and wall thickness) of the rotary forging blank. Under the feed parameters, the deformation of the blank during the blank forging process was studied under different diameter-thickness ratios. The deformation data of the blank obtained by the simulation is post-processed to obtain the stress value during the swaging process, and finally, the stress value of the blank under different diameter-to-thickness ratios is obtained. The critical value of buckling or yielding lays the foundation for further research on improving product forming quality.