Gear Contact Analysis And Gear Modification Research Based On The Element Methed

Gear transmission is a kind of important mechanical transmission mode, and itsapplication is extremely broad. The helical gear is used in gear transmission from a steel1580hot strip mill gear system. In the actual work, the tooth root fracture and the top position oftooth surface scratch close to the gear fault arise. Grasping the stress distribution in the workingprocess and researching modification technology are of great theoretical significance toimprove the bearing capacity and stability of the transmission.In this research, the steel1580hot strip mill main reducer gear was regarded as theresearch object. First of all, the Pro/e software was utilized to establish parametric model ofgear, and helical gear assembly without interference was achieved in combination with theprinciple of the bevel gear.Finite element analysis of helical gears was conducted to find the maximum bending stresson tooth root and the maximum contact stress on tooth surface. According to the results of finiteelement calculation of gear strength, the reasons of gear failure were found, and somesuggestions for improvement were put forward.Based on the theory of gear tooth profile, a method of gear optimum modificationcombined with the finite element software was presented: the two-dimensional model ofmodification gears was established. Finite-element static nonlinear calculation’s method wasutilized to analyze the top gear meshing position. Different modification parameters and gearmeshing contact stress the relationship between the gear meshing were obtained. The contactstress decreased with increasing modification when the modification amount reached a certainvalue. Continuing to increase the modification to reduce the stress has no effect on tooth contact.Therefore, the optimum modification amount of gear was attained.