Abstract: Aiming at designing the tapered end blank rotary-cutting forming device and getting cross wedge rolling without concave， the influences of parameters were analyzed， and the main structure of the device was designed. The best combination was obtained by analyzing the influences of baffle gap， base circle diameter， widening angle during the forming processes. Furthermore， a differential gear train transmission mechanism of the rotary-cutting tool was proposed. And according to the requirements of the processes， a reasonable transmission ratio distribution of the differential gears was determined. The device was designed and manufactured， and the experiments were carried out. The results show that the quality of the tapered end obtained by rotary-cutting forming is good， and the size of the tapered end of test is the same as the simulated ones. The feasibility of the rotary-cutting forming processes of the tapered end blanks and the rationality of the structure design of the rotary-cutting forming are verified. 

Key words: cross wedge rolling, tapered end, rotary-cutting forming, design of structure, experiment device

摘要： 为开发锥形端坯料辊切成形装备进而实现轧制无凹心成形，研究了辊刀结构参数对辊切成形质量的影响，并设计了辊切装置的主要结构。通过分析辊切成形过程中辊刀挡板间隙、基圆直径和展宽角三个结构参数对锥形端成形质量的影响规律，确定了辊刀最佳结构参数组合。进而提出了可实现辊刀绕坯料公转的同时逐步自转的差动轮系传动机构，并根据辊切成形工艺要求，确定了差动轮系合理的传动比分配。最后设计并制造了辊切成形装置，完成了锥形端坯料辊切实验。结果表明，通过辊切成形得到的锥形端成形质量较好，且实验辊切锥形端与仿真模拟锥形端尺寸基本一致，验证了锥形端坯料辊切成形工艺的可行性及辊切装置结构设计的合理性。

关键词: 楔横轧, 锥形端, 辊切成形, 结构设计, 实验装置