基于增材制造工艺的机械臂三轴座V法成形  

Vacuum Molding Process for Robotic Arm Triaxial Housing Based on Additive Manufacturing Technology

作　　者：左春林 董选普[1] 林少凯 ZUO Chun-lin;DONG Xuan-pu;LIN Shao-kai(State Key Laboratory of Material Processing and Die&Mold Technology,Huazhong University of Science and Technology,Wuhan 430074,Hubei,China)

机构地区：[1]华中科技大学材料成形与模具技术国家重点实验室,湖北武汉430074

出　　处：《铸造》2020年第2期191-195,共5页Foundry

摘　　要：通过熔融沉积成形工艺打印了铝合金机械臂三轴座造型外模模样,通过3DP(三维快速印刷成形)工艺打印了机械臂三轴座铸型砂芯。分析了造型外模模具的尺寸精度与表面粗糙度、砂芯的强度等工艺参数。将造型外模模具与砂芯用于V法造型铝合金浇注。结果表明:机械臂三轴座造型外模模具线收缩为0.301%,体积收缩率为1.121%,铸型砂芯24 h抗拉强度为1.424 MPa,机械臂三轴座铸件线收缩为0.342%,体积收缩率为1.253%,表面粗糙度为3.314μm,满足铸件质量要求。Aluminum alloy robotic arm triaxial housing pattern was printed by fused deposition modeling(FDM) process, and the sand core for the robotic arm housing casting was printed by three-dimensional rapid printing(3 DP) molding process. The process parameters such as dimensional accuracy and surface roughness of pattern as well as strength of sand core were analyzed. The pattern and sand core were used for vacuum molding process in aluminum alloy casting experiment. The results indicate that the linear contraction and volume contraction of the robotic arm housing pattern is respectively 0.301% and 1.121%, the 24 h final strength of sand core is 1.424 MPa;the linear contraction and volume contraction of the robotic arm housing casting is respectively 0.342% and 1.253%, and the surface roughness is 3.314 μm, which meets the casting quality requirements.

关 键 词：熔融沉积成形 3DP V法造型 机械臂三轴座 

分 类 号：TG249[金属学及工艺—铸造]