Optimization Design And Analyses And Research Of Isothermal Extrusion Die Structure For The Connecting Rod Lid

Extrusion technology as a kind of high efficiency and high quality ,the low consumption one does not have little processing technologiesof smear metal, have been developed rapidly in the plasticity of themetal material is processed. At present, the application in suchdepartments as the machinery , light industry , civil , space flight ,war industry , electric apparatus ,etc. is extensive day by day, havealready become indispensable importance in the process technology ofplasticity and processed one of the means. However, the ones thatextrusion die and designed are unreasonable, while working, one ofcorners in cavity, it can be more serious that the stress concentratesphenomenon, like this, die can produce flaw at one of corners in thecavity in type often after some time, with the constant enlargement ofthe flaw , cause the fracture of the die finally. So, in order to givefull play to the superiority which extrusion technology, it is extremelyessential to the research of the life-span of the extrusion die.The level of the life-span of extrusion die is to weigh one of theimportant indexes which the quality of the die, it not only influencesproduct quality but also influence the productivity and cost. There isa lot of factor that influences die life-span, to select suitablematerials with implementing correct hot treatment technology isfoundation to guarantee die life-span. But the design of the die is evenmore important to extrusion success used. If die design unreasonable,choose one different material can increase the life-span of the dieperhaps, but until the design of the die is rational , could make thedie receive strength evenly while working , stress centralized andlittle , difficult to receive partial year, best production capacityof die in this way realize.numerical simulation of extrution figuration is one of field aboutthe front subject of metal plasticity process. With the development oftechnology of the computer , have already begun to adopt the computermodelling technique to guide die design both at home and abroad. Throughtake shape mould of course go on high-accuracy number value calculatepinching, can understand in an all-round way the stress in the courseof extrusion moulding is distributed , predict the appearance of thecrackle , provide for designer craft analysis and scientific basis ofdie design, thus can improve the designing quality of the mould andshorten the design cycle of the mould . This paper, through giving definitely one correctly –isothermalextrusion die for the Automobile engine connecting rod lid carry onnumerical simulation , analyse concave structure form impact on concavemodel's intensity. Analyse through simulation , have optimized diedesign , has obtained rational concave model's structure finally, thuslengthenned the service life of the mould , has been analysed the die'sintensity finite element method at the same time . The line elastic finite element method regards ideal elastomer asthe research object, the deformation setting-up considered is on thebasis of the thing that suppose small and out of shape. Among thequestion, stress of material with is it present line sexual relationsto meet an emergency , meet broad sense moustache grams of law; Meetan emergency and displacement is the line sexual relations. Line elasticfinite element issue is it in order to solve linear equation group ,so only takes less calculation time to sum up. If adopt thehigh-efficient algebra equation group to ask the method of solving ,contribute to reducing the time that the finite element analyses. Lineelastic finite element generally including line elasticity quietstrength between analysis and line elastic power analyse two maincontents, the category that this subject studies is the line elasticityquiet strength analysis. This paper has discussed the step of the finite element algorithmand such key technology as the division of choosing , net of the unit ,dividing the net ,etc. in the finite element algorithm at first. Amongthem, should pay attention to while dividing the net, finite elementquality that net divide take shape to follow-up result of computationalanalysis have heavy influence very. The assurance that the finiteelement net divided should be possible reflects the form characteristicof the original curved surface model, figure of unit must control withinthe range of the certain one, because unit figure too much to will isit calculate time pass long and efficiency decrease to lead to the fact.The finite element method is similar to the computing technology fornumber value. When the net is the more intensive, the result ofcalculation generally says that be able to disappear solving accurately .Dense net can obtain accurate result under most situation, but ifpresent net density is it solve result close to theory solve very alreadyto ask sometimes, encrypt the net to calculating the precision improvesthe meaning not big again. And then, this paper has analysed the elastic finite element methodof the space question. This paper later utilize special CAD modelstructure die model, UG of software, turn into necessary curved surfaceParaSolid of model exchange the form file, then read and enter in thenumerical simulation software. This paper utilize finite elementanalyse software ANSYS to go on the numerical simulation of isothermalextrusion die for the connecting rod rid, can ask the distribution mapof the stress , according to the distribution that should be tried hardto have , have put forward the measure designed of improving, thusguarantee there is enough intensity in the cavity ; Through set up finiteelement model of isothermal extrusion die and analyse that can know tohis result, as to connecting rod lid if die is divised single styleconcave mould , prestressing force of ring to design, of corner stressconcentrate phenomenon to be relatively serious in cavity, die servicelife shorter. If adopt and increase the thick (namely strengthens theconcave model's external diameter ) method of concave model's wall tosolve, in the diameter than the situation that is greater than, it isfutile, waste the valuable mould steel. Improve through a series of,compare and analyse the simulation result, finally, adopting type oneof concave moulds of association of two layers got through, has reducedthe stress and concentrated the phenomenon greatly , reduce concavemould person who receive maximum , effect of strength , thus guaranteethere is enough intensity in the concave mould , lengthenned the servicelife of the mould at the same time ; Through this simulation , have provedfurther the application of the mould CAE system can offer a designerto carry on craft analysis and scientific basis of mold design, thuscan improve the designing quality of the mould and shorten the designcycle of the mould , have reduced the consumption and cost of the mouldmaterial . During the process of imitating , need introduction correspondingparameter, for instance unit type , material characteristic , unit size ,border terms ,etc.. If the parameter is input incorrectly, it is unableto draw the accurate result . This paper discusses parameter , finiteelement of simulation input method , analyse each interreaction ofparameter, have explained and imported to the influence that theparameter imitates the result correctly. The parameter of this...