FEM Analysis Of Head Deformation During Forming H-beam

H-beam is widely used in the construction of national economy in virtue of its excellent section properties. With the development of production and application of H-beam in our country, increasing requirements is raised on product specification variety, close tolerance of shape and dimensions. It is to require we to decrease the cost of production and increase enterprise's competitive strength.During the course of producing H-beam,we can manufacture the qualified production with the traditional way to distribute the depression of web and flange, but this way always leads to the head too long and waste much metal due to poor distribution of coefficient of extension, and the production is poor strengh with high residual stress.Studied the hot-rolling H-beam, using the dynamic analysis methods of elastic-plastic finite element method, with large commericial finite element software ANSYS/LS-DYNA, simulate the head deformation, reseach the head extention and distribution of residual stress, get the rational extention ratio distribution to make the length least and limited the residual stress to what they will allow.By the end of hot-rolled H-beam deformation in the simulation and experiment, breaking the traditional web and the flange extension of the coefficient of distribution method, and found both to shorten the tongue-shaped make the the residual stress not grow.Use of the tongue-shaped control program, the blank size in the experimental circumstances, the length of web and flange is shorter than the traditional procedures and the web and flange in the rolling process can be maintain a good appearance.In the course of the experiment and simulation was found inside flange of the level of roller pairs of the amount of reduction should be 2.5mm or less is appropriate, beneficial to the inside flange surface quality as well as the flange of the metal flow.Through the use of tongue-shaped length of the program, get the theory of residual stress field, evever than the traditional rolling schedule, no large areas of stress concentration area.