The Research On Process Parameter Optimization Of 3D Inkjet Printing

With the globalization of the economy,market competition will become more and more fierce,and whether products can respond quickly to the market has become the key to the success of enterprises.3D printing technology of 3D inkjet printing technology has obvious advantages in forming speed,formable material type,equipment price,operation and maintenance cost,etc.It has good development potential and broad application prospects,and represents the development direction of 3D printing technology.In the existing three-dimensional inkjet printing process,the accuracy of the printed part is affected by data processing,powder material and adhesive impact permeation,in which the impact and penetration of the binder,the forming direction in the data processing,and the layer thickness are the main errors.source.Based on this,the paper carries out the following research:(1)Numerical simulation of the impact and penetration process of the binder in the porous material of the sand body,using COMSOL simulation software to numerically simulate the impact and penetration process of the binder,respectively study the solution properties on the impact and the characteristics of the sand bed.influences.At the same time,the experimental method is used to collect the spreading radius of droplet,and the size of the droplet unit is obtained.The experimental results are compared with the simulation results to verify the effectiveness of the simulation method.Finally,through simulation and experiment,it was found that the furan solution was used in the impact,and the printing parts using the BSS100 powder bed in the penetration were more efficient in forming and the molding precision was higher.(2)For the influence of different forming directions and layer thickness on the forming precision and forming efficiency of the workpiece,by analyzing the geometric characteristics of the model in the 3D inkjet printing process and the printing data processing,the forming direction and the layer thickness are established as variables.A multi-objective model targets molding accuracy and molding efficiency.(3)For the shortcomings of NSGA-II algorithm,an improved ladder adaptive algorithm and double sorting algorithm are proposed.The simulation test shows that the improved stepadaptive algorithm has certain advantages in algorithm convergence precision,jump-out local optimal solution and improved double-sequencing algorithm in algorithm optimization ability and population diversity.Combining the improved ladder adaptive algorithm and double sorting algorithm with NSGA-II algorithm,an improved multi-objective based SDNSGA-II algorithm is proposed.(4)Through simulation test comparison,the improved SD-NSGA-II algorithm performs better than the NSGA-II algorithm in the distribution of convergence and optimal solution set.The multi-objective program based on the forming direction and layer thickness is written by Matlab software.Then the experiment shows that the SD-NSGA-II algorithm can solve the better solution for the specific model compared with the NSGA-II algorithm.Therefore,the optimization of the molding direction and the layer thickness of the model is completed,and finally the molding precision and the molding efficiency of the model are effectively improved.