Structural Design And Optimization Of Large-scale Sand Mold 3DP Printing Equipment With Droplet Jetting

Sand mold 3D printing technology is a kind of rapid prototyping technology.With the development of sand mold 3D printing technology,it is widely used in industrial modeling,machinery manufacturing,aerospace,military,culture and art,archaeology,sculpture and other fields.At present,the research of sand mold 3D printing technology is mainly concentrated in the United States and Germany,and great breakthroughs have been made in the field of high-precision and large-scale sand mold 3D printing;China is still relatively backward,and the designed sand mold 3D printing equipment can not meet the printing needs of casting molds for aerospace large thin-walled parts.With the transformation and upgrading of the traditional casting industry and the proposal of the concept of green environmental protection,the requirements for the casting industry are becoming higher and higher.Therefore,the research on the independent and controllable 3D sand mold printing technology is also particularly important.Based on the working principle of micro drop jet sand mold 3D printing technology,a large sand mold 3DP printing equipment is designed,the mechanical system structure design and reliability design of 3D printer are completed,and the finite element simulation analysis and structural size optimization of key parts are carried out.According to the working principle of sand mold 3D printing technology,the structure design of 3D printing equipment is completed,and the 3D modeling of the equipment is completed with NX software;The reliability of 3D printing equipment is designed,and the distribution and prediction of reliability index are completed.Based on NX advanced simulation module,conduct finite element simulation analysis on key parts of sand mold 3D printing equipment to check whether its stiffness and strength meet the requirements;For the parts and components that can not meet the requirements,through the method of orthogonal test,the influence of the size of the parts and components on the stiffness and strength of 3D printing equipment is analyzed,the size that has a great influence on the stiffness and strength of 3D printing equipment in the parts and components is found,and the size of the parts and components is optimized by using the constraint optimization method to obtain the optimal value.The debugging platform of 3D sand mold printing equipment is built,the mechanical installation and debugging of 3D printing equipment are completed,the sand mold established by 3D modeling software is printed,the functional performance of 3D printing equipment is debugged and tested,and the problems encountered in debugging and testing are dealt with.The final test results show that the system runs stably and reliably,has good printing quality and high printing accuracy,and meets the design requirements.Finally,the research work of this paper is summarized,the shortcomings of this paper are pointed out,and the further improvement research direction is put forward.