加工如图1所示的摩托车的起动变速轴,备料后经车、钳、铣、刨、磨等几道工序加工而成。具体过程如下:一、备料起动变速轴的材料,可用型号为18CrMnTi或20CrMnTi的钢棒料。二、加工过程1、锯床下料:尺寸为φ40×135_(-0.50)毫米。2、用C 615车床粗车大头:先车端面,再车外圆为φ31~(±0.10)×70毫米;接着车 Processing as shown in Figure 1 start the motorcycle speed change shaft, after preparation of the car, pliers, milling, planing, grinding and other processes from several processes. The specific process is as follows: First, prepare the material of the starting speed shaft, available models 18CrMnTi or 20CrMnTi steel bar material. Second, the process 1, Saw cutting: size is φ40 × 135 _ (- 0.50) mm. 2, with C 615 lathe crude car bulk: first car face, then the car outside the circle is φ31 ~ (± 0.10) × 70 mm; then the car