加工六方形体常用立铣及分度的方法,但其效率较低,且等分精度不高。我厂加工的半轴零件有一段长140mm六方形体截面(见图1)。图中:六方形体外径:D_(emax)=39.83;D_(emin)=39.67;六方形体底径:D_(imax)=35.92;D_(lmin)=35.76。为了提高加工六方形体的工效和加工质量,我厂设计和试制一种展成的六方滚刀,其效果良好。一、滚刀的设计设计该滚刀可根据已知的工件形状和尺寸大小,按展成原理来求出刀具的法向齿形。当用展成刀具切 Six square body processing methods commonly used milling and indexing, but its lower efficiency, and the accuracy is not high. Our factory processing of semi-shaft parts has a length of 140mm hexagonal body cross-section (see Figure 1). In the figure: hexagonal body diameter: D emax = 39.83; D emin = 39.67; hexagonal body bottom: D imax = 35.92; D lmin = 35.76. In order to improve the efficiency of processing hexagonal body and processing quality, I plant design and trial production of a hexagonal hob, the effect is good. First, hob design and design The hob can be based on the known shape and size of the workpiece, according to the principle of expansion to obtain the tool’s normal profile. When using exhibition cut into cutters