Research And Design Of 3D Printing Device Based On Concrete Material

With the rapid development of the domestic economy,there is an increasing demand for construction industry for national development and construction,3D printing technology integration of manufacturing industry has led to huge changes in the construction industry,accelerating the automation progress of the construction industry will be a quality solution to meet the development of the times and solve the current problems.Therefore,construction 3D printing equipment has a huge market and a broad space for development.Concrete is one of the most widely used building materials in construction projects.According to the current stage of enterprise requirements and development status,this thesis proposes to design a concrete-based 3D printing device to achieve the needs of improving construction efficiency,reducing labor intensity and green production.In this thesis,a combination of hardware selection,structural design,simulation analysis and experimental study is used to carry out the research and design of the concrete-based 3D printing device.Firstly,the overall design of the control system of the printing device is chosen with the control scheme of"upper computer+lower computer",and the hardware and software of the control system are selected and designed,including industrial control machine,PLC,servo motor and driver,and electronic components.Secondly,the design of 3D printing equipment is proposed according to the actual demand,the mechanical structure of the equipment is analyzed and designed,and the mechanical structure of the equipment is verified through static simulation analysis,the simulation results show that the stress is within the permissible range,and the deformation is very small and negligible.The detailed parameters of the motor and reducer are listed.Then,the overall structure of the extrusion device of the concrete 3D printing equipment is designed,and the drive unit of the extrusion device is calculated and selected;meanwhile,the key parameters of the extrusion device are analyzed hydrodynamically using the control variable method,and the variation range of the key parameters is set according to the design requirements.The optimized model is subjected to fluid simulation analysis,and it is verified that the optimized model is more in line with the expected value,and the internal flow field is smooth and no backflow phenomenon occurred;the fluid-solid coupling analysis is conducted on the extrusion device,and the maximum deformation of the device is 1.396×10^-5mm,and the deformation is negligible to the extrusion device,which verifies the design of the extrusion device.This verifies the feasibility of the extrusion device design.Finally,according to the requirements of the research topic combined with the structure of the 3D printing device designed in this thesis,a small concrete 3D printing experimental platform is designed and built.With the help of the printing experimental platform,printing experiments are conducted,and then the correctness of the concrete 3D printing device designed in this thesis is verified,and the whole process of experimental device,experimental materials and experimental verification is systematically analyzed.This thesis designs a 3D printing device based on concrete material,which is important for future research on architectural 3D printing technology and the development of architectural 3D printing devices.