Movement Structure Analysis Of 3D Printer

In order to improve the forming precision of 3D printer,this paper discusses the structural stability of 3D printer and the influence on the accuracy of 3D printer from the structure of mechanical movement of 3D printer.At present,the mechanical structure of popular 3D printers in the market can be roughly divided into several types such as triangular type,rectangular type and delta type.The article mainly chooses two representative models prusa I3 and MEM300,among which prusa I3 belongs to triangular type,MEM300 type printing is rectangular type.Solid Works software was used to make solid modeling of the main structure of the 3D printer with two structure types.Then the finite element dynamic analysis of the obtained model was carried out to discuss the structural stability of the 3D printer.According to the theoretical analysis of the finite element method,the actual defects in the 3D printer structure are optimized and improved,which provides a reliable theoretical guide for the actual optimization and improvement experiment.For the prusa I3 structure type of 3D printer,there is a more pronounced vertical stripe effect on the vertical surface of the object that was modeled prior to the optimization.And finite element analysis shows that there is a serious deformation in the nozzle system of the 3D printer,the column,and the bottom hot bed.In the optimization of the nozzle system,the remote feeding method is adopted,the stability of the optical axis diameter,material and nozzle structure of the supporting nozzle system was analyzed,and a reasonable solution is obtained.In the column and the bottom hot bed for processing,the method used to increase the auxiliary fixed structure.After the change of the overall model,the deformation is greatly reduced and the modal analysis frequency is also greatly improved in the finite element analysis experiment,and the texturing effect on the vertical surface of the actually printed shaped object is also better.For the MEM300-based 3D printer,we analyzed the effect of the speed of the feed-structured Polaroid motor on the stability of the printer's styling structure.Firstly,simulation parameters of different types of Polarizing motor were simulated by using simulation software,and the discrete Fourier transform was used to get the frequency domain curve of velocity parameters.Secondly,the frequency domain speed parameter of the polarization motor is taken as the driving parameter of the finite element spectrum response analysis,and the response of the structure of MEM300 is analyzed.Finally,according to the theoretical result of spectral response analysis,the polarization motor of the printer was replaced and the actual printing experiment was carried out,and it verified that the reasonable speed range of the polarization motor was in the range of 36-40r/s,the optimized printer feed efficiency and model surface profile,compactness,has been better improved.Comparing two types of mechanical structure of the 3D printer,to improve the forming accuracy and stability of the printer,you need to reduce the amount of movement and vibration intake of 3D printers in modeling process.Additionally,the symmetry of the structure design should be maintained as far as possible.It is helpful to improve the vibration mode frequency of the whole model.Improve the stability of the 3D printer during operation.