挂绳架是抽油机驴头部位重要配件,主要承受径向载荷。生产中,在挂绳槽部位(图1),因热裂造成废品,在合金和工艺方面采取措施,使废品率得到了有效的控制。1挂绳架结构及原工艺方案挂绳架材质为ZG230-450,壁厚20 mm,铸件质量10.5 kg,挂绳槽部位为非加工部位,要求铸件表面光滑,无裂纹、砂眼等缺陷,铸件内部无缩松、气孔等缺陷。原铸造工艺(图2)浇注系统横截面积比 Hanging rope rack is an important part of pumping head donkey head, mainly to bear radial load. Production, in the lanyard slot parts (Figure 1), due to thermal cracking caused by waste, in the alloy and the process to take measures so that the rejection rate has been effectively controlled. 1 The structure of the hanger and the original craft plan The material of the hanger is ZG230-450, the wall thickness is 20 mm, the casting quality is 10.5 kg, the parts of the hanger groove are non-machined parts, the casting surface is required to be smooth, no cracks, Internal no shrinkage, porosity and other defects. The original casting process (Figure 2) casting system cross-sectional area ratio