基于气压驱动的蜡模3D打印成形精度研究  

3D Printing Accuracy of Wax Mold Based on Pneumatic Drive

作　　者：莫海军[1] 梁道明 林晨彬 Mo Haijun;Liang Daoming;Lin Chenbin(School of Mechanical and Automotive Engineering,South China University of Technology)

机构地区：[1]华南理工大学机械与汽车工程学院

出　　处：《特种铸造及有色合金》2023年第2期185-190,共6页Special Casting & Nonferrous Alloys

基　　金：广东省科技创新专项资金资助项目(2019G011)。

摘　　要：快速模具制造可打印熔模铸造用的蜡模。对基于气压驱动的蜡模3D打印技术进行研究,采用单参数对比法,运用FLUENT软件对不同喷嘴直径、收缩角以及口模长度等喷嘴结构参数进行了数值模拟。以尺寸偏差作为线宽精度评价指标,采用正交试验法,对喷嘴结构参数进行成形线宽精度试验,得出优化的参数组合。并运用方差分析和多元非线性回归分析,研究喷嘴直径与收缩角、口模长度之间的相互耦合作用对打印线宽精度产生的影响。结果表明,蜡模打印线宽精度在喷嘴直径、收缩角和口模长度等因素的共同作用下的最优参数是喷嘴直径为0.6 mm、收缩角为80°、口模长度为1.0 mm。Rapid mold manufacturing can be utilized to print wax pattern for investment casting. 3D printing technology of wax pattern driven by air pressure was investigated, and the nozzle structural parameters including nozzle diameter, shrinkage angle and die length were numerically simulated and analyzed by single parameter comparison method and FLUENT. Taking the size deviation as the evaluation index of linewidth accuracy, the forming linewidth accuracy experiment of nozzle structural parameters was carried out by orthogonal experimental method to obtain a optimzed parameter combination. Variance and multiple nonlinear regression analysis were adopted to investigate the influence of the coupling among nozzle diameter, shrinkage angle and die length on the printing linewidth accuracy. The results indicate that the optimum parameters of wax pattern printing linewidth accuracy under the synergy of nozzle diameter, shrinkage angle and die length are presented as follows: nozzle diameter of 0.6 mm, shrinkage angle of 80°, and die length of 1.0 mm.

关 键 词：气压驱动 熔模铸造 结构参数 线宽精度 耦合作用 

分 类 号：TG249.5[机械工程—精密仪器及机械]