Nonlinear Finite Element Analysis Of ZR Mill's Key Transmission Parts

Sendzimir mill is one of the key equipments in silicon steel strip production. In the wake of the increase demand to this electric steel and the raise requirement to the produce quality, the load of the roll's main transmission has been increased, and the downtime of the accidents cased by it becomes a problem that need to solve urgently. So it has extremely vital significance in enhancing the mill's productivity, guaranteeing the safety in production reduce the accident rate and improving the product quality to research the strength and load-bearing ability of Sendzimir mill's key transmission parts. This article takes the important equipment of Sendzimir ZR22BS-42 mill's main transmission system—safety pin and gear case's oblique tooth gear—as the research object, analyses its strength and load-bearing ability by using nonlinear finite element method.As to the finite element analyses of the gear case's oblique tooth gear, the key problem is how to built tooth profile model accurately. This thesis applies parameterization technique to build the tooth profile model of the gear case's oblique tooth gear in three-dimensional entity mold making software PRO/E, meanwhile, carry out the gear's assembly and motion emulate, check motion's interference. This part of work is the preparation of the finite element method calculation.Gear contact nonlinear analysis implicates up a lot of elements, so it is a complex problem. The pretreatment of the gear model is the key step in gear contact analysis. This thesis firstly researches the ZR mill gear case's oblique tooth gear model's simplify, and then discusses the load and boundary condition's selection of gear contact analysis. On the influence of different mesh density to gear contact analysis's result, this thesis use the method of ceaseless make dense mesh and experimental calculating finally compare the calculating result, to ensure this ZR mill gear case's oblique tooth gear has the mesh density in reason. Above this bases, the article also researches the influence of friction between two gears to the calculating result. According the analytic result of this thesis, it obvious that, the maximum gear contact stress and the maximum gear root main stress always strengthen along with the friction coefficient become higher and higher, however, if the friction coefficient become much higher gradually and equally, the strengthen trend of maximum gear contact stress and the maximum gear root main stress will become much weaker gradually and equally. In that case, make the stress-check calculating of gear, must be use the stress value of the maximum friction coefficient and check it. This work has actual referenced significance to the likeness gear contact finite element analysis. At last, check the gear contact stress and gear root stress's punishing stress and research the gear's load-bearing ability of this ZR mill gear case's oblique tooth gear by the calculation result. This...