1.有一锥体塞规如图1所示,求大头直径D是多少?(磨工)2.如图2所示,若采用加强刀尖的90°偏刀车削缺圆台肩轴外圆时,为了保护刀尖,要选择最小的刃倾角λ_(min),求证其几何关系为:sinλ_(min)=b/(R-t)式中:b为刀尖接触点平行于接触面的偏心距,当工件与刀刃同时接触时刀刃延长线的偏心距。R为工件半径,t为切削深度。 1. There is a cone Cypriot gauge shown in Figure 1, seeking the bulk diameter D is how much? (Grinder) 2. As shown in Figure 2, if the use of enhanced nose tip 90 ° Pogo shoulder circular cylindrical when missing , In order to protect the tip, to choose the minimum inclination angle λ_ (min), verify the geometric relationship is: sinλ_ (min) = b / (Rt) Where: b is the tool nose point parallel to the contact surface of the eccentricity, When the workpiece and the blade edge simultaneously contact extension of the eccentricity of the blade. R is the workpiece radius, t is the depth of cut.