我厂需经常加工螺纹较长的调节螺杆、圆柱管螺纹等。过去一直采用车削方法加工,不仅生产效率低,而且质量差。特别对细长螺杆(L/d>50～100),因长径比值较大,刚性差,在切削过程中工件极易产生弯曲和振动,形成腰鼓形,以致不易得到理想的牙形,它的螺距几何精度以及表面粗糙度达不到要求。 I often need long-term processing plant thread adjustment screw, cylindrical pipe thread. In the past, the turning method has been used to process not only low production efficiency but also poor quality. Especially for the slender screw (L / d> 50-100), due to the large ratio of length to diameter and poor rigidity, the work piece is easy to produce bending and vibration during the cutting process, forming waist drum shape so that the ideal tooth shape is not easy to obtain The pitch of the geometric accuracy and surface roughness can not meet the requirements.