Research On Frame Strength And Active Status Of The φ8-32mm Straightening Machine

In recent years, the development of iron and steel industry is vigorous, and the demand for round-steel is rising sharply. But in the process of rolling, forging and drawing, due to forcing, uneven cooling and heating or transportation and stacking, round-steel will produce bending and distortion in different degree, or internal residual stress, which will affect the quality of finished products. Therefore, these defects are necessary to be eliminated in production via straightening. The cross-roll straightener is a finishing equipment straightening the rods. The intensity and the rigidity of the straightening machine rack decides the precision of straightening precision in active status, immediate influence the quality of rods and bars and the rate of yield.This topic originates from the participation Baoshan Steel CorporationΦ8-32mm two roller rods and bars straightening machine project, because the theory predicted value of the straightening strength is small, but the design and the computation of the biggest straightening strength have the important influence to the tube rods and bars' straightening diameter scope. The straightening scope in the thick rods and bars straightening effect is not very ideal in actual straightening, even presents the phenomenon that the holding-down was went against. This article according to the situation of rectifying as well as three curvature mechanical model, proposed mechanical model suits curvature inflection roller shape in this straightening machine, and computations biggest straightening strength of this mechanical model. Through three dimensional modelling of the straightening machine by solidworks and simulation by the finite element analysis software ANSYS and dynamics analysis software ANSYS/LS-DY NA, the article obtains a value of reliable biggest straightening strength, and has carried on a series of analyses of the rigidity and intensity about the straightening machine.This article obtains the biggest straightening strength through the simulation, the straightening strength small question which in the solution actual straightening meets. Through to the pre-stressed rack just the strength analysis and the ANSYS static state stress analysis, obtained the stress displacement to distribute the rule, reduced the stand stretch to the roller seam influence, enhanced the straightening precision stability.