基于SLS的诱导轮快速熔模铸造工艺研究  

Investment Casting Process of Induction Wheel Based on SLS

作　　者：杨来侠[1] 白祥 徐超[1] 王勃[1] 高扬 YANG Lai-xia;BAI Xiang;XU Chao;WANG Bo;GAO Yang(College of Mechanical Engineering,Xi'an University of Science and Technology,Xi'an710054,Shaanxi,China)

机构地区：[1]西安科技大学机械工程学院

出　　处：《铸造》2019年第10期1121-1126,共6页Foundry

基　　金：国家863项目计划项目：快速模具制造工艺与性能研究（2015AA042503）;国家自然科学基金：基于复合载药的可降解药物控释系统结构优化设计研究（51605379）

摘　　要：以诱导轮为例,开展了基于选择性激光烧结(SLS)的复杂曲面零件快速熔模铸造工艺研究。首先采用SLS成形聚苯乙烯(PS)工艺制作了叶轮树脂模型并进行浸蜡处理,其次采用硅溶胶工艺制得该诱导轮的型壳,最后采用PROCAST软件进行数值模拟,对可能产生的缩孔缩松进行预测,并进行实际浇注试验。结果表明,浸蜡前尺寸相对误差范围为-0.185%~3.22%,浸蜡后模型单面尺寸增加0.2~0.3 mm,平均表面粗糙度为0.647μm,表面粗糙度等级由3级上升到9级;在型壳预热温度1 115℃、浇注温度1 600℃、浇注速度1.5 kg/s进行浇注,保证铸件合格良好的内外质量。经测量后该铸件平均尺寸相对误差范围0.17%~0.19%;表面粗糙度平均值是0.693μm,达到试验预期。Taking the induction wheel as an example, the rapid investment casting process of complex curved parts based on selective laser sintering(SLS) was studied. Firstly, the impeller resin model was fabricated by SLS polystyrene(PS) process, and the waxing treatment was carried out. Secondly, the mold shell of the induction wheel was prepared by using the silica sol process. Thirdly, numerical simulation was conducted using PROCAST software to predict the shrinkage porosity that may occur, and the actual casting experiment was carried out. The desired results were achieved in the inspection tests. The relative error range of the pre-wax is-0.185%-3.22%, the single-sided size of the leaf after the waxing is increased by 0.2-0.3 mm, and the average surface roughness after waxing is 0.647 μm, which is raised from grade 3 to grade 9;casting is carried out at a mold shell preheating temperature of 1 115 ℃, a pouring temperature of 1 600 ℃ and a pouring speed of 1.5 kg/s to ensure good internal and external quality of the induction wheel;the relative error of the average size of the produced casting is 0.17%-0.19%, and the average surface roughness is 0.693 μm.

关 键 词：激光选区烧结 复杂曲面零件 熔模铸造 工艺参数 

分 类 号：TQ249.5[化学工程—有机化工]