Structural Design And Motion Test Study On Aticulated 3D Printer Used In Building

The technology of 3D printing used in building attracts tremendous attention because of its many advantages such as little energy consumption,low pollution emissions,high production efficiency and so on.Now,most of the building 3D printers are huge gantry mechanical structure at home and abroad.They have many disadvantages such as large space occupation,low space utilization,not flexible movement,high cost and so on.Besides,there are less printers used for printing small and medium size building materials such as brick,blocks and so on now.However,these materials are essential during the building progress.It will be very wasteful if companies use huge mechanical structure to print small and medium size building materials.To solve those problems above,this thesis designs a kind of articulated 3D printer used for printing small and medium size building components.According to the performance requirement of building 3D printer,this thesis proposed a design plan of 3D printer.The thesis determined performance parameters,and configuration scheme,addressing scheme,transmission scheme of the printer.Then the thesis designed the structure of the printer.According to the structure of the printer,this thesis established its kinematic model and analyzed its positive and inverse kinematics and workspace.Then the thesis used Matlab to verify the validity.The thesis analyzed the force condition and listed the equations of joint forces and moment to establish dynamic model.Then,this thesis calculated the values of the forces and moment by the programs and used software to analyze the dynamic simulation.The last results verified the validity of the theory analysis.The thesis considered the theory values of the forces and moment as the finite element analysis boundary conditions.The thesis used software to analyze the finite element static characteristics and modal to verify the rigidity,strength,inherent frequency of the printer which satisfied the material requirements.Then the thesis used the Ansys to conduct lightweight design to promote the performance of the printer.Then,the thesis ensured the overall plan of the control system which meant the thesis used PC and motion control card.The thesis completed the establishment of the hardware and software control system,assemble the prototype.Based on these work,the thesis conduct the experiments.The experimental results indicate the printer possesses well load capacity and movement capacity,and the design of the printer is reasonable.