直角形支架工艺设计课件.doc

一、造型材料选择················································································1 二、浇注位置及分型面的确定··································································1 三、铸造工艺参数设计···········································································1 1.加工余量的选择···············································································2 2.铸件孔是否铸出的确定········································································2 3.起模斜度的确定···············································································2 4.铸造圆角的确定···············································································3 5. 铸造收缩率的确定···········································································4 6.考虑加工余量后的尺寸········································································4 四、造型方法的设计·················································································4 五、木模的设计·······················································································5 1.木模的外形设计················································································6 2.木模的设计尺寸················································································6 六、浇注系统和冒口设计·············································································7 1.浇注系统选择··················································································7. 2冒口的选择·····················································································7 七、铸型装配图设计·····················································································8 八、设计体会···························································································10 参考文献·························································································11 一、铸造合金和造型材料的选择 1. 铸造合金的选用 因为此次制造的直角形支架使用时负载比较大，要求具有比较高的强度，故采用铸钢ZG270-500 2. 造型材料~10%）来代替石英砂。在湿模造型时，小型和中小型钢铸件泥心砂可以采用小颗粒的半肥沙（粘土含量10~20%）作为附加物加入石英砂中。加入的耐火粘土，其工艺试样的抗压强度应为0.5~0.6kg/mm2。耐火粘土应该是白色或者淡灰色的，不应有可被肉眼看出的混杂物，如砂子、矿石、石灰等。碎粘土所含水分不应超过2%。（铸件材料是铸铁时，制造湿砂型的粘土砂所用粘土为膨润土，湿抗