Research And Application Of Automobile Lamp Design Based On CAD/CAE Technology

With the continuous development of the automotive industry,more and more people are paying attention to the lighting quality and appearance of the lights.The headlights are an important guarantee for the car to drive,providing good lighting and signal functions for safe driving of the car.The design of the car lights will directly affect the aesthetics and safety performance of the car.Through the understanding of the company's lighting industry,it is known that there are few designers in the lamp industry,and many of the core technologies of the lamps still need to be explored continuously,especially the new ideas and technologies applied in optical design.This paper applies CAD/CAE technology to the design and manufacture of taillight system as the research object,Optimized and improved the fogging phenomenon in the design of the lamp and researched the optical free-form surface design and the light guide technology of thick-walled parts.In this paper,the design and manufacturing methods of the lamps are mainly explained by the structure design of the lamp,the simulation of the optical design and the design of the lamp shell injection mold.Firstly,CATIA is used to design the main component structure in the taillight system,and each part is subjected to draft analysis and interference check to ensure the rationality of the part structure design.The thermal analysis is used to simulate the heat distribution of the lamp,and the ventilation hole is reasonably arranged at the position where the heat is concentrated,thereby increasing the air circulation inside the lamp and avoiding the phenomenon that the lamp is fogged.The biggest innovation of optical design simulation is the design of three different optical systems different from traditional mirrors,light guides and collimating lenses.Most of the earliest optical surfaces are designed as parabolic surfaces.The disadvantages are that the mirror structure is too large,the light intensity distribution is not uniform,it is not easy to control the light illumination direction,and the pattern processing is also required on the outer lens.The free surface is added on the basis of the original paraboloid.The light distribution of each small free surface and the shape of the surface are used to control the distribution of the light intensity of the whole vehicle.This design makes the light intensity distribution more uniform and easy to adjust.Light guide technology has been gradually applied to automotive lighting.Its biggest advantage is that it can turn the point source into a uniform surface light source,and greatly reduce the number of LED and reduce the production cost.This time,the innovative thickness is adopted.The wall light guide technology is designed with a position light that makes the brightness of the light wider.The CAE technology is used to analyze the mold flow of the injection mold to reduce the defects that may exist in the actual injection molding and ensure the quality of the production.Finally,the sample is subjected to photometric test and air tightness test to verify the accuracy of the structure and optical design of the lamp.Then the work piece is tested for three-coordinate precision,and the detected data is compared with the simulated warpage deformation data.Lamp manufacturing precision.The experimental data shows that the design and simulation method of the taillight is effective,and by studying the innovative optical design method,the optical lighting effect of the taillight is greatly improved,which is affirmed and highly evaluated by the customers and business leaders.I hope that through the elaboration of this article,we will accumulate more valuable experience for the progress of the domestic lamp industry.