| In the context of technological progress and the dynamic development of industrial practice,intelligent manufacturing technology is the most important trend in the future development of global manufacturing industry.China needs to rely on technological innovation to move forward from a "big manufacturing country" to a "strong manufacturing country".Among them,digitizing objects in the real physical world,creating highly restored entities in the digital world,and further understanding and optimizing the operation rules of physical entities,namely digital twins,through simulation and analysis of the digital world,is an effective way of technological innovation.On the other hand,in the practice of enterprises,it is found that motor manufacturing enterprises have the problem of low assembly efficiency,mainly because of the large variety of small motors,high requirements for accuracy during assembly,and complex assembly process,which makes the assembly efficiency of small motors low,the assembly process management difficult,and there are many factors affecting the assembly process.Traditional methods are usually difficult to monitor the assembly process of small motors quantitatively,accurately,and visually,It is also difficult to find the problems in the assembly process comprehensively and effectively.In order to effectively solve the problems of low assembly efficiency and difficult management of small motors,this paper uses digital twin technology to propose a research on modeling and simulation of small motor assembly process based on digital twin,designs a small motor digital twin assembly system,realizes digital twin simulation and visual monitoring of assembly process,and enables enterprises to model Simulation and visual monitoring can help workers improve their cognitive ability of small motor assembly environment and assembly process,and provide managers with a management method to improve the assembly efficiency of small motors.The main research contents of this paper are as follows:(1)Taking the assembly process of small motor as the research object,the assembly process flow of small motor is analyzed,and a small motor digital twin assembly system is designed and developed.The system requirements are analyzed,and the design principles of the system are proposed to provide technical support for the development of the system.At the same time,according to the actual requirements of the system,the system is divided into four functional modules: human-computer interaction interface,assembly process knowledge base,assembly environment roaming,and virtual assembly simulation.The digital twin system architecture of small motor assembly process is established by virtue of the five dimensional model of digital twin,and the overall development process of the system is planned.(2)By collecting information related to small motor assembly,the geometric model,behavioral model,and logical model of small motor assembly process are established,and these models are analyzed,composed,and assembled to form a digital twin model,and a digital twin world is constructed,which mainly contains the three-dimensional world of mechanical equipment,small motor parts,operation employees,and assembly environment in the small motor assembly process,and combined with the constructed In combination with the constructed behavioral and logical models,it is possible to realize correct and rigorous assembly process operations in the twin world,which plays a supporting role for the subsequent simulation.(3)The digital twin model of small motor assembly process is simulated.Firstly,the data of relevant assembly process system is collected,sorted,classified and transmitted.Then use the Unity 3D virtual engine development platform to build the virtual assembly scene of small motors.Finally,through the settings of virtual scene lights,object materials,cameras,etc.,1:1 restore the real assembly scene,enhance the realism of the virtual scene,and enhance the immersion experience of system users.Then,the assembly process of small motor is simulated from three aspects: assembly equipment layout simulation,assembly process simulation and assembly data simulation.Finally,the whole assembly process results are simulated and analyzed with Flexsim software.From the perspective of managers and employees,the problem of poor assembly efficiency of small motors is effectively improved with the help of digital twin technology. |
