为了研究主要工艺参数对基于球形旋轮的锥形件无模旋压成形极限的影响规律，通过球形旋轮锥形件旋压成形试验，开展旋压件半锥角、旋轮进给速率、板料初始直径、旋轮半径4个主要工艺参数对旋压件成形极限的影响规律研究。结果表明，旋压件半锥角减小导致旋轮在板料轴向的进给增大，以及板料与旋轮的接触面积增大，旋压件易出现起皱或开裂现象。此外，旋压件半锥角减小会使芯轴圆角处板料的弯曲程度增大，旋压件也易出现开裂现象。旋轮进给速率增加使板料与旋轮之间的接触面积增大，旋压件易出现起皱现象，旋轮进给速率减小，旋轮对板料的成形时间延长，旋压件易出现开裂现象。增加板料的初始直径会使板料径向所受拉应力的时间增加，导致旋压件在顶面圆角处易出现开裂现象，而旋压件半锥角减小导致板料的变形增大，旋压件法兰的起皱风险增加，导致旋压件法兰易出现起皱现象。半径较小的旋轮在成形时板料径向拉应力的持续时间较长，导致旋压件易出现开裂现象；半径较大的旋轮在旋压成形末期板料所受的周向压应力增大且持续时间较长，导致旋压件外缘易出现起皱现象。

In order to study the influence law of main process parameters on forming limit of conical parts in dieless spinning based on spherical roller， the influence of four main process parameters， such as spinning part half-cone angle， feed rate of the spinning roller， initial diameter of the sheet metal and roller radius， on the forming limit of the spinning part was studied through the spinning forming experiment of the conical part with spherical roller. The results show that the decrease of the half-cone angle of the spinning part leads to the increase of the feed of the spinning roller in the axial direction of the sheet material and the increase of the contact area between the sheet material and the spinning part roller. The spinning part is prone to wrinkles or cracking. In addition， the decrease of the half-cone angle of the spinning part will increase the bending degree of the sheet material at the round corner of the mandrel， and the spinning part is prone to crack. The contact area between the sheet and the roller increases with increasing the feed rate of the roller. The spinning part is prone to appear wrinkle. When the feed rate of the roller decreases， the forming time of the roller to the sheet is prolonged， and the spinning part is prone to appear crack. The increase of the initial diameter of the sheet metal increases the time of the tensile stress on the radial direction of the sheet metal， which leads to the cracking of the spinning part at the top fillet. While the decrease of the half-cone angle of the spinning part leads to the increase of the deformation of the sheet metal and the risk of wrinkling of the part flange. The flange of the part is more likely to wrinkle. The radial tensile stress of the sheet metal with a smaller radius is longer in duration during forming， which leads to cracking of spinning parts more easily. The circumferential compressive stress of the sheet metal with a larger radius increases and lasts longer in duration at the end of spinning forming， resulting in the outer edges of the spinning parts being prone to wrinkles.