Design And Trajectory Planning Of Composable 3D Printer

With the development of technology and the economy,the traditional assembly line production methods are unable to meet the demand for diverse and individual products,which has led to the gradual introduction of 3D printing technology into people’s daily lives.In order to adapt to the needs of a wider range of users and different usage environments,3D printing equipment designs are emerging,but most of the existing equipment is based on a longitudinal stacking and forming method,which produces a solid surface with an obvious stepping effect:1.Proposes a combinable 3D printer structure,analyses the kinematic principle,establishes a UG model of the overall structure of the five-axis 3D printer,including three mutually perpendicular linear axes,two rotation axes,A-axis and C-axis,in which the A-axis drives the rotation of the print nozzle and the C-axis drives the rotation of the printing platform;selects the motion components that can achieve multi-coordinate combined motion,designs the screw extrusion device and the mounting frame,etc.2.For the stability analysis of the complex mechanical structure of the combinable 3D printer,a simplified ANSYS model is established,and the solid material properties are set in the software,the structural mesh properties are defined and the whole machine load is applied,and the overall deformation and maximum stress values are solved to meet the accuracy of use.Through the modal analysis of the whole machine,the study of the first six orders of vibration can be seen that the overall value of the machine’s inherent frequency is small,and the main deformation is concentrated in the guide bar,the whole machine is not easy to produce resonance.3.In order to check the rationality of the motion,a virtual prototype of the combinable 3D printer was built in ADAMS,slip drives were added to the linear axes and rotation drives were added to the rotating axes,and a stage time STEP function was designed for the kinematics of the whole machine components to obtain the velocity and displacement curves of the moving parts.The material properties of the components were added,the linear slide and linear actuator were set to run at a constant speed,and the dynamics of the main stressed components during motion were analysed,resulting in the selected components meeting the force requirements.4.Designed the control flow of the multi-coordinate combinable trajectory,selected the S7-1200 series PLC as the control core,and designed the control circuit of each axis drive and motor.Assigned the connection ports of each axis drive to the PLC and created the hardware configuration of each axis drive in the TIA Portal.Design of the initial motion program module for each axis,complete with drive commissioning and motion program verification.The rationality of the combinable 3D printer was verified by running the rectangular,circular and sector motion trajectory program in the prototype and plotting the multi-coordinate combined motion trajectory.