Research On Technology And Productivity Improvement Of Aluminium Alloy Panel Hemming

At present,the world is faced with many problems such as serious environmental pollution,energy shortages,car ownership increase and so on.In order to solve these problems,lightweight technology has been gradually applied to the automotive industry.Lightweight technology can not only reduce the body quality,but also improve fuel efficiency.The use of lightweight aluminum alloys instead of steel on body panels not only reduces body mass but also improves fuel efficiency.Aluminum alloys have low density,good wear resistance and corrosion resistance,high strength,good formability,high hardness,high thermal shock resistance,high modulus,high fatigue strength,but aluminum alloy materials Thin and thin,and the process is easy to pull cracks,which put higher requirements on the connection process of aluminum alloy body panels.In recent years,the traditional wrapping process has not been able to keep pace with the development of the automotive industry.The connection technology of the body parts of foreign automobile companies mostly uses the robotic edge-rolling technology.Therefore,in this paper,the method of combining the finite element analysis method and experimental verification is used to study the robotic trimming process of aluminum alloy auto body panels.Based on the mechanics theory of sheet metal forming,this paper uses ABAQUS software to establish a plane-linear robotic hemming model.The stress and deformation of the board during the rolling process are studied.The TCP-RTP,fillet radius and roller diameter are discussed.The influence of other parameters on the quality of the piping provides advice on setting the piping parameters.Orthogonal experiment method is used to optimize the edge parameters.The effects of TCP-RTP,fillet radius and roller diameter on the quality of the rolling(indentation and ingression)were analyzed.It was found that the fillet radius was a significant factor,followed by TCP-RTP,and the wheel diameter had the least effect.A robotic edge-rolling experimental platform was built to verify the aluminum alloy's edge forming characteristics.Two sets of experiments were set up,and the influence of different TCP-RTP and edge force on the quality of the rolling was discussed.The experimental results and simulation results were compared and analyzed.Comparison of the forming characteristics of steel plate parts and aluminum alloy plate parts to verify the feasibility of aluminum alloy plate parts applied to the body covering parts.At the same time,the efficiency of robotic trimming is relatively low.It is also an important issue to improve the trimming efficiency of robots.This article combines actual production scenes with an engine hood as an example to use ROBCAD software to build a robotic island roll edge island under the premise of ensuring product quality.By rationalizing the number of robots and optimizing the trajectory of the robot,the efficiency of the robot's piping was improved,and the production cycle of the engine hood production line of the model was increased to 30 JPH to meet the factory capacity requirements.