我厂过去采用普通车床加工起重机的滑轮,效率低,劳动强度大,而且铸铁材料在加工时粉尘飞扬,严重影响操作工人的健康。1973年我厂设计制造了两台加工滑轮的半自动专用机床,大大地改善了劳动条件,提高了劳动生产率;而且机床具有结构紧凑、造价低等 In the past, our factory used ordinary lathe to process the pulley of the crane, which was inefficient and labor-intensive. And the dust of the cast iron material was flying during processing, which seriously affected the health of the operators. In 1973, our factory designed and manufactured two semi-automatic special machine tools for processing pulleys, greatly improving working conditions and improving labor productivity. Moreover, the machine tool has the advantages of compact structure and low cost