programming by the plane curve unwrapped from the helix curve and cutting layer by layer, we created the variable pitch screw on the 3.5 axis nc milling.
文章基于3.5轴数控铣床,利用螺旋线展开的平面曲线编程,分层切削,加工出变螺距螺纹;
the variable pitch screw driving mechanism could be designed according to the requirements of the rapier motion.
从分析实例可见,根据给定条件设计的变导程螺旋传动能满足所提出的运动规律要求。
compression cancellous bone screw with both ends thread is a variable pitch screw designed to provide rigid 'fixation of cancellous bone fracture.