Research On ABS Fused Deposition Modeling’s Heat Transport And Bonding Mechanisms Based On Ultrasonic Vibration

Fused deposition modeling,one of the rapidly evolving 3D printing technologies in recent years,is widely utilized in the production of goods like crafts,medical equipment,automobile and aerospace parts,etc.The mechanical and mechanical qualities of items created using other methods,such as injection molding,are superior to those produced using FDM manufacturing due to this process’ effect.In order to address this issue,a finite element analysis model of FDM molded parts was created,and the effects of various process parameters(such as the hot bed temperature,extrusion temperature,and delamination thickness)on the temperature field and stress field during the fused deposition modeling process were examined.Experiments confirm that the simulation is accurate.The influence effect and mechanism of ultrasonic vibration assisted fused deposition modeling were utilized to examine the impact and mechanism of its influence on the molded parts in order to further improve the mechanical characteristics of the sample parts.First,a finite element analysis model of FDM molded parts is created using life and death unit technology and APDL based on the FDM transient thermal direct coupling model.The influence of each process parameter on the heat transfer and bonding quality of the wire is then analyzed by numerical simulation of various process parameters,and the impact of various process parameters on the mechanical properties of the molded parts is investigated.The findings demonstrated that there was a consistent relationship between the influence of several process parameters on the tensile strength and compressive strength of the sample,with layer thickness having the largest impact and hot bed temperature,layer thickness,and extrusion temperature having the least impacts.The tensile strength and compressive strength of the molded components can be improved by appropriately raising the extrusion temperature while keeping it from rising too high,raising the hot bed temperature,and lowering the layering thickness.A method of introducing ultrasonic vibration under the forming substrate of the fused deposition modeling equipment is proposed,and it is based on the conclusion of the numerical simulation,in order to further improve the mechanical properties of the molded samples.This will increase the bonding strength between the filaments during the deposition process,reduce the risk of filament breakage,and improve the mechanical properties of the molded samples.Tensile and compression experiments were conducted by varying the ultrasonic power while maintaining the other process parameters in order to investigate if ultrasonic vibration impacts the mechanical characteristics of molded parts.The findings demonstrate that appropriately increasing ultrasonic power can enhance the tensile and compressive strength of molded parts.Additionally,SEM analysis of the tensile specimen section demonstrates that ultrasonic vibration can enhance the bonding strength between layers,tighten the bond between layers,and thereby enhance the mechanical properties of molded parts.In the end,the FDM molding process is optimized using the response surface method,and the influence of ultrasonic power and process parameters(such as extrusion temperature,hot bed temperature,and delamination thickness)on the mechanical properties of molten deposition products is investigated.The quadratic regression equation and data analysis response surface are obtained by analyzing the variance using software.Extrusion temperature233.85℃,hot bed temperature 93.38℃,delamination thickness 0.1 mm,and ultrasonic power43.09 W were the ideal process parameter combinations to achieve tensile strength.Extrusion temperature 237.40℃,hot bed temperature 100℃,delamination thickness 0.1 mm,and ultrasonic power 37.55 W are the ideal process parameters for compressive strength.