3D打印砂模浇道曲线化设计与性能仿真

Curved design and performance simulation of 3D-printing sand mold runner

砂模3D打印是一种新型砂模造型手段,具有极高的设计灵活性,不受模具局限。利用这一点,可以优化浇注系统结构,减少铸造缺陷产生。从铸造缺陷的成因入手,对传统浇道局限性与新工艺下的优势进行分析;为改进传统浇道金属液入流时稳定性不佳的缺陷,针对浇注过程中影响铸件质量的主要因素,研究利用浇道曲线化来提升浇注性能的可行性,基于ProCAST数值仿真对两种曲线结构进行性能分析;最终对某厂铸造试验件进行浇道曲线化案例设计与浇注仿真试验,验证其有效性。浇道曲线化能够优化金属液流态,减少铸造缺陷产生,达到优化铸造工艺、提升产品质量的效果。

3D-printing sand mold is a new type of sand casting featuring flexible design and without any limitations in mold. Based on this, the casting system can be further optimized, in order to minimize casting defects. Proceeding from the cause of casting defects, a comparision is made between traditional and new runners, and an analyais on the advantages of new process- es is conducted. In order to eliminate the poor stability of metal liquid inflow of traditional runners, based on the main factors affecting the casting quality, the curved runner is adopted to improve the feasibility of casting performance. Based on the Pro- CAST numerical simulation, the performance analysis of the two curved structures is carried out. Finally, the curved design and simulation experiment are conducted on the casting sample manufactured by a factory, in order to verify its effectiveness. The curved runner optimizes the metal liquid inflow, and minimizes casting defects, thus ensuring the optimized casting processes and the enhanced product quality.