Research On Process Planning Proceeding For Automotive Manufacturing And Pivotal Simulation Technique Based On Digital Factory

With the globalization development of economic and market the competition among the car manufacturers are more and more fierce.It is the key problem that how to produce the market needed high quality cars quickly and more accurately.Advanced manufacturing technology is a commendable method for this key problem,and the digital factory(DF)is the core technology of the advanced manufacturing technology.The digital factory technology produces all-wave technology transform of process planning and production line layout from planning flow to process realization.The digital factory technology can reduce the period of planning and designing,reduce error rate,reduce the period of produce,reduce the cost the planning and production.And then it provides strong technology support to flexibility production and rapid market supply.Currently we use the digital factory technology still in the local application stage in our country,there is no deep transform on procedure and technology.Some automobile manufactures use PLM platform,but nearly no one achieve nature change in work flow and implement,no matter joint investment automobile manufacture or our own automobile manufacture.Base on the above reasons this article proposes practicability procedure of process planning and implementation procedure base on the digital factory platform by some planning and implementation projects,and researches the parameters and methods of simulation technology during planning and implementation.The major content of this article is as follow:1.Digital factory technology provides a 3D visual planning platform,process simulation platform and pro for automotive manufacturing process analysis platform.DF provides a full range of virtual manufacturing technology support for automotive manufacturing.By analyzing the existing domestic automotive manufacturing process planning proceeding this paper propounds the process planning proceeding of automotive manufacturing based on digital factory,and the software security and the external security to keep the new proceeding effective functioning.This paper expounds the digital factory technical suppor,including digital technology planning,process simulation and plant simulation,to each stagecombined base on various stages of the process planning and the actual project experience.2.Process simulation is the bridge of process planning and production lines implementing.Process simulation provides a virtual simulation technology support for process validation and process solutions.This paper defines the concept of process simulation,simulation point of intervention,simulation scope of analysis and simulation input and output base on a number of process simulation projects,clearly articulateds process simulation content and form of technical support,and researches the simulation process,device definition,simulation input and output form,human-computer simulation in detail.This paper propounds a practical standard proceedingof process simulation base on body shop planning,and relying on the actual simultaneous engineering project of body shop expounds the technical support of process simulation for product design and process planning.3.Automobile manufacturing is pipeline operations,and the development of modern equipment and technology increases the level of automation of production lines.Machinery brings break down and a lot of mechanical uncertainty.Process logistics simulation provides a whole analyse technical support to the whole manufacture proceeding.This paper,by analyzing the process logistics simulation point of intervention,the scope of simulation analysis,simulation input and output,clearly defines the content and form of simulation technical support.This paper expounds two methods and corresponding formulas of setting cycle time and the formula of init setting for buffer capacity and researches how to use genetic algorithm to analyse buffer capacity.This paper put out some modeling forms of different stages and some effective forms of simulation analyse and explain in detail base on some practical projects.4.Digital factory technology can also provide effective simulation support for the physical logistics planning and actual operation.The paper first analyzes the physical logistics simulation point of intervention,the scope of analysis for the simulation,simulation input and output,defines the content and form of physical logistics simulation technology support,then researches the form of simulation input,standardized modeling simulation,the various types of simulation analysis results.This paper defines the form of simulation input and simulation results,and how to model standardized modules of the logistics system,and finally explains them in detail base on some actual projects.