Surface 3D Printing Hierarchical Slicing Algorithm And Path Planning

The conformal bearing antenna is an antenna that is conformal to the aircraft and has the functions of transmitting and receiving electromagnetic signals and bearing functions.Compared with the planar array antenna,it has high integration,can maintain the aerodynamic characteristics of the carrier,and has a small radar scattering cross-sectional area and a large antenna aperture,etc.The multi-material integrated forming technology is a potential manufacturing method of a conformal bearing antenna,which can quickly realize the printing of the structural part and the electromagnetic part of the conformal bearing antenna in sequence.Compared with the traditional manufacturing method,the process is simple and the manufacturing cost is low cost,easy to form complex surfaces and other advantages.However,the staircase effect caused by the traditional flat slicing 3D printing method will lead to poor electrical conductivity and connectivity of the curved circuit.The surface 3D printing method must be adopted,and the problems of surface slicing printing model generation and curved printing path planning must be solved urgently.To this end,the following work is carried out in this paper.Aiming at the problem of the decrease of electrical conductivity caused by the step effect of plane layered slices,a method of surface layered slices growing along the normal direction of the surface is proposed.Aiming at the problem of shrinking and distortion of the new surface caused by the inward growth of the surface from the outer surface,taking the boundary of the part as the goal,a surface extension model is established to realize the complete layering of the surface.Aiming at the problem of low filling rate when filling non-expandable surfaces by the uniform filling method,an isometric parallel curve filling method is proposed.According to the filling accuracy requirements,a spatial isometric curve network model is established by fitting the surface.Filling the pixels increases the filling rate of the non-expandable surface and improves the printing accuracy.Aiming at the sawtooth effect of the filling boundary of the single-layer area,a boundary compensation filling method suitable for the array nozzle is proposed,the boundary step effect model is established,and the boundary is analyzed.In order to improve the printing accuracy of the edge of the single-layer area,selecting the appropriate size of droplets and combining with small movements can improve the void area.Aiming at the problem of low printing efficiency of non-expandable surfaces,an optimization model for segmented surface printing was established to determine the optimal printing direction and optimal segmentation scheme,which improved the printing efficiency under the premise of ensuring printing accuracy.Aiming at the problem of the interference between the concave surface printing nozzle and the workpiece,a nozzle interference detection model is established,and a nozzle vector adjustment algorithm based on the artificial potential field method is proposed.The distance between the workpiece and the nozzle surface at each position of the initial path is analyzed,and the nozzle vector adjustment standard is established,to realize the concave surface printing path planning.Finally,a set of surface printing model generation and path planning software is developed.The experimental results show that compared with the traditional method,the filling rate is increased by 13.05%,the printing efficiency is increased by 60%,and the electrical conductivity is increased by 50%.