我厂生产的各种铸钢滑轮，以前为了补缩轮槽根部与轮辐构成的热节，轮槽都不铸出（图1），而由机加工完成，切削工作量大．且铸造工艺出品率仅为55％。图1原滑轮工艺简图（轮缘处设且3个边冒口，内浇口由边冒口引入）为了提高工艺出品率，减少切削工作量，我们对原工艺作了改进 I plant a variety of cast steel pulleys, in the past to make up for the rotation of the wheel root and the spokes of the heat section, the wheel groove is not cast (Figure 1), and completed by the machining, cutting workload. And the casting process yield is only 55%. Figure 1 The original pulley technology diagram (set at the rim with three sides riser, the gate from the riser introduced) In order to improve the process yield, reduce the cutting workload, we made improvements to the original process