Research On Structural Design And Optimization Of Parallel 3D Printer

3D printing technology has developed rapidly.Among them,3D printers represented by fused deposition modeling(FDM)are most well known.The 3D printer is popular because of its low cost,high material utilization rate,and no pollution.In the printing process,it is found that when the indoor temperature is low,the printing accuracy is low,and when the temperature is high,the printing precision is high.Considering that FDM is sensitive to temperature,and in the northeast,the indoor temperature difference between winter and summer reaches 30?.Based on this background,this paper independently designed a constant temperature heating device,which can control the temperature in the printer chamber to compensate the temperature of low temperature printing,reduce the cooling rate of molten materials,and improve printing accuracy.In addition,this paper also independently designed the sports system,transmission system,overall frame and other components.The 3D software CATIA was used to complete the 3D modeling of the entire component and mechanical system,and the finite element analysis and improvement of the structure were carried out to ensure the reasonable structural design.The test analysis was carried out using a self-designed 3D printing system.Taking the rectangular parallelepiped as the printing model,the accuracy of the three printing directions at different environment temperatures was measured.The results show that when the ambient temperature is 5?,the error of three printing directions is relatively large;when the ambient temperature is increased to 20?,the accuracy of each direction is improved,indicating that improving the ambient temperature can effectively improve the 3D printing quality and accuracy.Orthogonal test was carried out with three parameters: ambient temperature,layer thickness and printing speed.The results of X-direction,Y-direction and Z-direction were analyzed by orthogonal test range analysis and variance analysis.The analysis results show that the ambient temperature has a great influence on the 3D printing accuracy in three directions.the layer thickness has a greater influence on the Z direction,and the printing speed has less influence on the three directions.Through the printing results of the self-developed 3D printing system,it can be found that the printing accuracy at low temperature is effectively improved,the error caused by low temperature can be solved,and the printing quality can be improved.The design can provide technical support for 3D printing.