3D打印模样技术熔模铸造工艺最小铸出壁厚的研究

Study on Minimum Cast Wall Thickness of Investment Casting Technology Based on 3D Printing Pattern

基于蜡模3D打印技术,探索了熔模铸造工艺不同壁厚零件的充型情况。结果表明,3D打印可制备0.5mm及以上蜡模模具,但在浸蜡过程中0.5mm及1.0mm的蜡模均发生明显变形,不满足精度要求,满足浸蜡要求的蜡模最小厚度为1.5 mm;熔模铸造过程中,0.5~2.0 mm厚的铝铸件充型过程出现不同程度的浇不足问题,壁厚2.5 mm的充型良好;0.5~2.5 mm厚的铸铁件充型良好,无明显缺陷。

Based on the wax mold 3D printing technology,the mold filling situation of parts with different wall thickness in investment casting process was explored. The results show that the 0. 5 mm and the wax mold can be prepared by 3 D printing,but the 0. 5 mm and 1. 0 mm wax mold are obviously deformed in the process of paraffin dipping,and the minimum thickness of the wax mold meeting the requirements of paraffin dipping is 1. 5 mm. In the process of investment casting,the filling of aluminum castings with 0. 5 ~ 2. 0 mm thickness appears different degree of insufficient casting,and the filling of aluminum castings with 2. 5 mm wall thickness is good. The cast iron of 0. 5 ~ 2. 5 mm thickness has good filling and no obvious defects.