1980年我厂与外商达成协议,决定出口一批抽油机。每台抽油机有、两根曲柄,每根曲柄的两面各有一条齿条(见图1),曲柄重519 kg。小批量生产时i是在B 5050型插床上用成形刀手摇分度单齿加工的。这种方法效率低、精度差、劳动强度大,还容易造成废品。为此我们对 Y 58型插齿机进行了 In 1980, our factory reached an agreement with foreign businessmen and decided to export a batch of pumping units. Each pumping unit has two cranks, each with a rack on each side (see Figure 1) and a crank weighing 519 kg. Small batch production i is in the B 5050-type slotted knife sharpening indexing single tooth processing. This method is inefficient, poor precision, labor-intensive, but also easily lead to waste. To this end we carried out the Y 58 gear shaper