The Research Of Finite Element Simulation Of Tubular Product's Forming

Tubular products are more and more extensive used in aeronautics and astronautics, pipeline,petrochemical, light industry, automobile and life supplies and so on. Tubes plastic processing is to form the tubular products making use of plastic processing method. Tubes plastic processing is the secondary processing, so the tubes plastic processing belongs to the field of further machinery technology.This paper introduced the forming method of tubular products and finite element simulation using in the plastic forming briefly, and established the finite element model of tubular products of 20 steel. Then simulated the process of teetube's bulging forming using the finite element simulation software DYNAFORM and analyzed the stress, strain and other technological parameter that influenced the height and thickness of bulging forming, including the back pressure, internal pressure, amount of feed in the tops, anisotropy coefficient, friction coefficient, radius of rounded angle and so on. Find the regularity and the reason.Deformation amount of the tubular products is larger in the bulging forming, the influence of parameters is complicated. So it is difficult to illustrate its regularity. It is necessary to simulate the multi-tube -the bicycle frame connector to compared with the teetube in the internal pressure amount of feed and other parameter. Then optimized the simulation parameter and simulated the teetube and multi-tube again using the optimized parameter.Compared and analyzed with each other and the simulation parameter of 20 steel can be obtained, and be used to simulated the cross pipe to verify the correction of the simulation parameter.