内孔沉槽的测量,一般靠进刀刻度来保证,车好后尺寸多少心中无数。我们利用几何定理:三角形两边中点的连线其长度等于底边之半。事先在两内卡钳上各做一个三角形缺口,找准中点,做为测点,如图所示。将卡脚伸入内孔沉槽。不管沉槽大小,内卡钳张大张小,中点始终不变,于是可用游标卡尺或千分尺测得AB长 Sinking of the hole measurement, generally by the knife to ensure that the size of the car after the size of the heart countless. We use the theorem of geometry: the length of the middle point on both sides of the triangle is equal to half of the base. Make a triangular notch on each of the two calipers in advance to find out the midpoint as a measuring point, as shown in the figure. Insert the card foot into the sink hole. Regardless of sinking size, the calipers Zhang Zhang small, mid-point is always the same, so you can use the caliper or micrometer measured AB length