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采用标准钻头,将切削刃磨成圆弧形,其刀刃上任意一点的法向前角有多大呢?沿着刀刃法向前角是怎样变化的呢? 下面分析如图所示的圆弧刃钻头。圆弧中心C的位置用坐标x_c表示,切削刃上任一点A所在圆的半径为R_x,钻心直径为2a。A点的位置亦可用角度μ_x来确定,显然: sinμ_x=a/(R_x) (1) μ_x—刀刃上A点的径向线与钻头刀刃在端
Using a standard drill, grinding the cutting edge into a circular arc, the blade at any point of the normal rake angle is how much? Along the blade normal rake angle is how to change? The following analysis as shown in the arc edge drill. The position of the arc center C is expressed by the coordinate x_c. The radius of the circle where any point A is located on the cutting edge is R_x, and the diameter of the center of the drill is 2a. The position of point A can also be determined by the angle μ_x, obviously: sinμ_x = a / (R_x) (1) μ_x - The radial line at the point A on the cutting edge coincides with the angle