关键词: 单螺杆, 单次包络, 成形加工, 成形误差

Abstract:  The single envelope forming method was one of the most main machining methods for the parts with tooth characteristics. According to the structural characteristics of CP type single screw gullets and the principles of space meshing， a calculation method of single envelope forming for CP type single screw gullets was studied. The method included the section edge shape calculation of rotary cutters， the equations of theoretical and envelope forming screw gullets creation， and single envelop forming errors analysis. The single envelope forming model of a common single screw gullet was calculated and optimized by using this method， the single envelope forming errors of the optimized reference tooth profile were calculated. The results show that error values are large， it indicates that the single envelope forming method may not be applied to the one-step forming of CP type single screw gullets. 

Key words: single screw, single envelope, forming processing, forming error