摘要
3D打印机是精密加工设备,机体结构的受力、温度变化、材料流体流速变化等因素对加工精度都会产生较大的影响。针对受载荷、温差、流速等因素的影响,3D打印机的机体会产生变形,从而导致加工误差的现象进行了详细分析。在设计过程中建立3D打印机挤出机构、工作台的CAD及有限元模型,通过模型的受力变形、流体分析、温度变化分析,找出机体变形的最大点;将挤出机构结构温度场耦合场、内部流体不可视转化为可视化,便于设计模型调整并优化处理;在对运算分析所得的数据进行研究基础上,进行整机机体的设计完善和优化,为3D打印机的优化设计提供科学有效的方法和必要的理论依据。
The 3D printer is a precision machining equipment. The force of the structure of the body, the change of temperature, the change of the flow velocity of the material and so on will have a great influence on the machining precision. In view of the influence of load, temperature difference and velocity, the deformation of the 3D printer’s body will be caused, and the phenomenon of machining error will be analyzed in detail. In the process of design, the CAD and finite element model of the 3D printer extrusion mechanism, the worktable are established. The maximum point of the body deformation is found through the force deformation, the fluid analysis and the temperature change analysis of the model, and the visualization of the coupling field and the internal fluid in the temperature field of the extruder structure is converted to the visualization, which facilitates the adjustment and optimization of the design model. On the basis of the analysis of the data obtained from the operation analysis, the design of the whole machine body is perfected and optimized, which provides a scientific and effective method and necessary theoretical basis for the optimization design of the 3D printer.
出处
《机械工程与技术》
2018年第2期130-137,共8页
Mechanical Engineering and Technology
基金
2016年江苏省淮安市基金项目支持(HAP201680)。
