QT500主轴内浇口位置对渣分布的影响

Influence of Ingate Position on Slag Distribution in the production of Ductile Iron Main Shaft

采用冷铁模工艺生产球墨铸铁500-14主轴,研究内浇道位置对铸件浮渣缺陷的影响。结果表明,内浇道位置不同,由于卷气或涡流引起的二次渣会出现在主轴大法兰拐角内侧及大法兰外端上平面。当内浇道靠近主轴内孔侧时,主轴大法兰拐角内侧浮渣较少,大法兰外端上平面浮渣较多;相反,当内浇道远离主轴内孔侧时,大法兰拐角内浮渣较多,大法兰外端上平面浮渣较少。通过改变内浇道位置并减小分度圆直径,可以减少相关位置的浮渣。批量生产此产品100余件,经磁粉探伤检测,夹渣均在可控范围内。

The influence of the position of inner runner on the scum defect of casting nodular cast iron 500-14 spindle was studied. The results show that the secondary slag caused by air entrapment or eddy current will appear in the inner corner of the main shaft flange and the upper plane of the outer end of the large flange. When the inner runner is close to the inner hole side of the spindle,there is less scum in the inner corner of the large flange of the spindle,and more scum in the upper plane of the outer end of the large flange. On the contrary,when the inner runner is far away from the inner hole side of the main shaft,there is more scum in the corner of the large flange and less scum in the upper plane of the outer end of the large flange. By changing the position of the inner runner and decreasing the diameter of the hot spot,the scum at the relevant position can be reduced. More than 100 pieces of this product were produced in batch,and the slag inclusion was all within the controllable range by magnetic particle flaw detection.