Research On Trajectory Control Method Of CFRP Based On Five Axis Platform

Carbon fiber reinforced polymer(CFRP)has been widely used in aerospace,automotive,sports and other fields because of its high strength,high modulus,fatigue resistance,creep resistance,low thermal expansion coefficient and so on.The traditional composite molding process mainly includes autoclave molding,transfer molding(RTM),winding,automatic placement technology,all need to die as basis and support for forming complex forming process,forming long cycle and high cost.Due to the demoulding,the traditional forming method is difficult to form the complex structure.3D printing technology developed a new technique for providing fast low cost carbon fiber structure products,no mould,molding theory can be arbitrarily complex configurations;the thermoplastic resin prepreg fused deposition modeling,simple manufacturing process,low cost.But the traditional 3D printing is formed by the line in the XY plane into the surface,and then the surface of the Z axis in the direction of the accumulation of body,suitable for traditional plastic,metal and other homogeneous materials.But for the carbon fiber composite material structure with anisotropic characteristics,the traditional method of planar layered Z non reinforced,the orientation of fibers in the direction of transmission cannot force optimization layout,greatly reduce the mechanical properties of molding products.Therefore,a continuous carbon fiber fused deposition method based on five degree of freedom motion platform is proposed,which can meet the requirement of the printing of the fiber direction according to the arbitrary space curve.Based on the design principle of the five axis Longmen machine tool,the mechanical structure of the five axis motion platform is constructed,which includes the XYZ of the three translational axes and the A axis around the Y axis and the B axis rotating around the Z axis.The PC+PMAC multi axis motion controller is used to build the five axis platform control system,the control card is set up,and the motion stability of the test platform is realized.Kinematics analysis was carried out on the platform using the kinematics model of five axis linkage machine tool,through the postprocessing technique to realize the path planning and trajectory generation of the simulation using VERICUT software to verify the path reliability,then make use of the five axis platform finished printing.The experimental results show that the five axis platform built in this paper has the ability of 3D printing with five axis linkage,and achieves the expected goal.