搓丝板是搓制螺纹的必不可少的工具。目前国内制造的搓丝板螺纹牙型一般采用滚压成形或铣加工后淬硬。滚压或铣加工成形的搓丝板只能做成单面搓丝板,并且对淬硬后的变形是无法修整的。故用该种搓丝板搓制的螺纹精度和表面粗糙度均较低。国外的搓丝板已广泛采用淬硬后直接磨削加工出螺纹牙型的方法,磨制搓丝板的螺纹牙型精度和表面粗糙度均比滚制的高。另外磨制搓丝板可以做成一块搓丝板有二个工作面,所以使用寿命可增加一倍。但制造磨制搓丝板的专用磨床国内至今尚属空 Roll plate is an essential tool for thread rubbing. Currently manufactured thread rolling thread profile generally used after rolling forming or milling hardened. Rolling or milling forming the rolling plate can only be made of single-sided rolling plate, and the deformation after hardening can not be trimmed. Therefore, the use of this type of thread rolling screw thread accuracy and surface roughness are low. Foreign rolling plate has been widely used directly after grinding hardened thread form, grinding thread rolling thread profile accuracy and surface roughness are higher than the rolling. In addition, the rolling mill plate can be made into a rolling plate has two facets, so the service life can be doubled. However, the manufacture of grinding screwdriver dedicated domestic grinder is still empty