DZ0309轮毂铸件的工艺改进

DZ0309轮毂铸件原采用Z1410AS造型机生产,每型2件,内孔由手工制作的油砂芯形成。生产结果显示:(1)内孔尺寸精度差,单件铸件型砂用量大;(2)每型件数过少,型板面积利用率低;(3)铸件工艺出品率较低;(4)铸件顶面夹渣、石墨漂浮缺陷严重。对缺陷原因进行了分析后,采用了如下改进措施:(1)对原工艺进行了改进;(2)采用静压造型线生产铸件;(3)取消砂芯,铸件内孔改为由吊砂形成;(4)采用陶瓷网挡渣。结果铸件表面质量明显改善,经济效益也相应得到提高。

Casting Method Improvement of DZ0309 Wheel Boss

The DZ0309 wheel boss had been produced originally with Z1410AS molding machine. There was two castings per mold and the inner hole was formed by using manually made oil sand core. Production result showed： （1）dimension aceuraey of the inner hole was poor and the molding sand consumption per casting was big; （2）casting number per mold too less and the area usage rate of the molding plate was low; （3）process yield rate of casting was relatively low; （4）there was severe slag inclusion and graphite floatation defects on the top surface of the casting. The defects reason were analyzed and the improving measures were adopted including： （1）the former casting method was improved; （2）producing the casting on SEIATZU molding line; （3） cancelling sand core and the inner hole was formed by sand cod; （4）the ceramic filter was used for slag skimming. As the result, the surface quality of the casting was obviously improved, and the economic effect also enhanced relatively.