Simulation And Optimization Of Gearbox Transmission Shaft Production Line Based On Digital Factory

As a key component of automobiles,the design of gearbox drive shaft includes production line planning,automation control,interaction design and other multidisciplinary fields.The current design method of gearbox transmission shaft production line is the traditional serial design method,which has the problems of design interaction obstacles,high rework rate of finished products and low productivity.In view of the above problems,this paper proposes a digital factory-based gearbox transmission shaft production line design simulation and optimisation method.Through the digital factory simulation technology,the parallel design of gearbox drive shaft production line,complete the equipment layout planning,using software in the loop virtual debugging technology,complete the virtual mapping of the production line I / O signals and process simulation,and finally the analysis of the robot assembly trajectory of the drive shaft,complete the optimisation of the trajectory of the assembly robot,to improve the assembly efficiency.The main work is as follows:(1)By analysing the needs and production goals of gearbox transmission shaft production line,the digital factory framework of gearbox transmission shaft production line is established based on four aspects,namely,control layer,connection layer,model layer and function layer,which provides basic support and theoretical basis for the establishment of transmission shaft digital factory.(2)According to the digital factory framework and the established production line component models of robot and AGV,the overall design and layout of the traditional shaft production line is completed through digital simulation technology,on which the basic work of production line simulation such as model definition,path planning and interference checking is completed,and the digital factory model of the gearbox transmission shaft production line is finally obtained.On the other hand,the production process simulation is completed on the digital factory model layer of gearbox transmission shaft production line to verify the feasibility of the transmission shaft assembly process.(3)According to the digital factory model of the transmission shaft production line,the OPC signal interface is adopted,and the software-in-the-loop virtual debugging technology is used to complete the electrical and PLC control of the production line during the design stage of the gearbox transmission shaft production line.The on-site commissioning process of the transmission shaft production line is simulated and verified in advance,which effectively shortens the on-site commissioning cycle.(4)In the digital factory function layer,the industrial robot assembly link is selected as the application scenario,and for the problems of low robot efficiency and unstable operation during the robot assembly of drive shaft assembly in this scenario,3-5-3segmented polynomial interpolation is used for trajectory planning in the joint space to realise the smooth operation characteristics of the assembling robot,and an improved particle swarm algorithm is utilised to effectively combine the 3-5-3 polynomial interpolation function and the particle swarm algorithm with the time as the fitness function.Using an improved particle swarm algorithm with time as the fitness function,the 3-5-3 polynomial interpolation function is combined with the particle swarm algorithm to improve the efficiency of the robotic arm in the assembly process.Comparison of simulation experiments shows that the algorithm adopted in this paper can increase the efficiency of drive shaft assembly by two times,which can fully meet the requirements of the production of drive shafts.The gearbox transmission shaft production line designed by this research topic,based on digital factory technology in the production line design stage of the production line simulation and virtual debugging,effectively solves the traditional serial design of the transmission shaft production line of the design cycle is long,poor interactivity and prone to rework problems;on the trajectory of the robot in the assembly process to improve the efficiency of the assembly of the transmission shaft.Responding to the industry 4.0 policy,it is of great significance to promote the intelligent transformation and digital transformation of manufacturing industry.