DISA线生产汽车转向节渣孔缺陷的防止措施

Slag Inclusion Preventing Measures of Automobile Steering Knuckle Produced on DISA Line

介绍了采用DISA垂直挤压造型线生产汽车转向节的生产工艺,根据铸件减震器孔内浇道附近产生的渣孔缺陷进行了大量分析,认为渣孔缺陷是由于3个冒口(内浇道)处铁液的流量分配不合理造成的。为验证不同冒口(内浇道)截面尺寸对渣孔缺陷的影响,设计了4种工艺方案,经验证,采取增加#1和#2冒口进铁液流量、减少#3冒口进铁液流量的工艺方式,使三者比例关系为F1内:F2内:F3内=2.4:2.4:1,可使汽车转向节减震器孔处渣孔单项废品率降低至0.12%。

The production technology of using DISA vertical extrusion line to produce automobile steering knuckle was introduced.According to a large number of analysis of slag inclusion defects near the ingate at the casting shock absorber hole,it was considered that the slag inclusion defects were caused by the unreasonable flow distribution of iron liquid at three risers(ingates).In order to verify the influence of different riser(ingates)section size on slag inclusion defects,four method schemes were designed.Verification showed:by increasing iron liquid flow through#1 and#2 risers,and reducing iron liquid though#3 riser,to make their ratio relation as F1ingate:F2ingate:F3ingate=2.4:2.4:1,it was possible to decrease the slag inclusion defects near the ingate at the casting shock absorber hole to 0.12%.