Research On The Improvement Of FDM Heating Device And Influence Of Temperature On Forming Parts

Fused Deposition Manufacturing is one of the Rapid Prototyping technologies, With the help of computer to get three-dimensional model slicing data, it can build each layer of the entity according to the slicing data in the actual machining process and the three-dimensional geometric entities by layers stacking. With the widely application in the field of manufacturing industry all over the world in recent years, FDM shows us that it has a glorious prospect and great social value by the research of its related technologies.But beneath the polished appearance of FDM, the formed parts is usually of low accuracy and low intensity, and those problems have become the bottleneck of the further development of FDM. The research subject of this article is introduced to solve problems of low accuracy and low intensity based on a combination of milling FDM composite molding method. Due to the entire manufacturing process following with action of thermal field, this paper proposes a new heating device that has four electrothermal pipe, this device has faster heating-rate and cooling-rate than the traditional heating device. The new heating device is proposed to meet the requirement of timely extrusion and timely stop,parts of higher intensity and higher accuracy can be achieved. The main research contents are as follows:(1) Introduce the research background and significance, and illustrate the reason and practical significance of proposing the new heating device base on the analysis of the problems existing in the composite molding method. The main research content is also put forward.(2) The numerical simulation of temperature field is studied on the heating device by ANSYS. Determine the types of temperature field under different working conditions, and established the relevant finite element model of the heating device. Set up the correct boundary conditions and reasonable assumption for the analysis.(3) Complete the numerical simulation of temperature field in three different kinds of working conditions, including stable work, heating and cooling. According to the result of simulation, finally get the temperature distribution nephogram and variation curve.(4) Build experimental platform to test the actual rate of heating and cooling of the heating device. Plot the actual temperature curve based on the experimental results and verify the rationality of the simulation. Finally take measures to improve the process as to improve the quality of formed parts.(5) Process experimental samples in same size respectively under different molding temperature, and measure related parameter of the samples. According to the measurement data, study the trend of variation in the forming parts with the change in molding temperature.