Design And Simulation On The Cantilevered NC Assembling Machine For The Assembled Camshaft

With the development of modern auto industry,The manufacture technological lever of engine parts have become increasingly high demand.For this reason,exploiting the manufacture technique of key engine parts means great to improve the competitiveness of automotive industry and promote the development of the auto industry.The camshaft of car engine is one of the key components,with complex structure and the high precision.The traditional processing methods of camshaft have so many defects that they have gradually fall behind the times and unable to met the High-performance requirements of contemporary cars.In recent years,Assembled camshaft,as a new processing method,has rapidly developed,which cams,mandrel and other components are shaped independently,and then they are installed to mandrel in some combining manners to be an integrative camshaft.Compare to the traditional camshaft production method,the assembled camshaft is has many merits,such as,light weight,low processing cost,reasonable material using,high bonding strength and good economy.Knurling connection method which is a new connection method of assembled camshaft is researched and developed by the Roll Forging Research Institute of Jilin University independently develops.The process feasibility of knurling connection method is proved by connection intensity experiment.In order to make the technology realize industrialization,on the basis of the existing theories,the design of NC Assembly Machine for the Assembled Camshaft is the key.Therefore,the main study content of this thesis is to design NC Assembly Machine for the Assembled Camshaft based on the knurling connection technology.According to the design size,this paper combines with the modern computer and uses the CATIA software to establish the dummy machine and to do the kinematics analysis.The main work of this paper has been done as following:1.Study of knurling connection mechanismThe connection technology of assembled camshaft decide its manufacturing technique and equipment.On the basis of explaining the various connection methods and types,the paper deeply studies knurling connection mechanism,and discusses the possibility which these method are used in production.2.Analysis of overall program and assembly process design for assembly machineAccording to the properties of the knurling joint process,structural concept of Assembly Machine is analyzed and assembly process is formulated;On the basis of it,the overall structure of the assembly machine is programmed and designed.3.Design of the mechanical systemsThe machine is based on the principles of rational function,high accuracy,high reliability, and good economy,the structure of cantilever frame,main transmission,clamping gyrating system,knurling system and rotary feed system have been designed.The work principle and the action flow of each system are summarized.4.3D solid modeling,virtual assembling and interference checking of Assembly MachineThe components of the Assembly Machine were designed in CATIA with 3D model,and then completed virtual assembly.On the basis of above,Interference detection of the DMU was done,certain intervention issues that are probably ignored in the design process are explored,and the unreasonable structure design or size was timely modified for the optimal design.To sum up,knurling connection mechanism of the assembled camshaft is researched in this paper,on the basis of technical feature of the knurling connection,assembly process of camshaft are worked out;The mechanism system of assembling machine is designed,also the hydraulic pressure system and the NC system of assembling machine are preliminarily planed.It offers the theoretical foundation and realistic directive significance for the total design of the New Cantilever NC Assembling Machine for the Knurling Assembled Camshaft.The Research of this paper on the Cantilevered NC Assembling Machine has higher-value In the assembled camshaft field,improving the processing efficiency and precision of camshaft,boosting the technique renovation of the engine industry of our country.