我厂84年承接了铸造葛洲坝一号船闸人字闸门底枢轴瓦任务。该件是闸门的主要受力部件(图1),净重1400公斤,浇注重量达2800公斤,材料牌号ZQAL9-4铝铁青铜,技术条件规定加工后不允许任何铸造缺陷存在。1.工艺方案的确定据有关资料介绍,铝青铜有着体收缩大、 In 1984, our factory undertook the task of casting the Gezhouba No.1 shiplock gate at the end of the pivot bush. The piece is the main force of the gate parts (Figure 1), net weight 1400 kg, pouring weight of 2800 kg, material grade ZQAL9-4 aluminum bronze, the technical conditions require processing does not allow any casting defects exist. 1. Process Determination According to the information, aluminum bronze has a large body contraction,