在刺绣机Ｖ型导轨中作重复运动的686ＺＺ/ＹＡ轴承球面形状复杂。在外圈双面要加工Ｒｍｉｎ=1 0 +0 .0 2 ｍｍ ,Ｒｍａｘ=1 1 +0 .0 2 ｍｍ的双外球面 ,其难度就在于磨双外球面上 ,经过改造 ,在 3ＭＺ1 32内沟自动磨床上以二次磨削法完成了双外球面的磨加工。1　砂轮成形通常磨 The 686ZZ / YA bearing spherical surface that makes repeated movements in the V-shaped guide of the embroidery machine has a complicated shape. In the outer ring on both sides to be processed Rmin = 1 0 +0 .0 2 mm, Rmax = 1 1 +0. 0 2 mm double spherical, the difficulty lies in grinding double spherical, modified, in the 3MZ1 32 inner groove Automatic grinding machine with secondary grinding to complete the double-spherical grinding process. 1 wheel forming usually mill