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以连续锻造大变形过程为研究对象,建立了变形过程的数学模型。采用Marc有限元软件对侧压过程进行了仿真分析,并对模具结构进行优化。结果显示,连续锻造大变形过程中,板坯塑性变形不断增加,坯料内部的应力分布呈现与表面平行的层状结构;4个边界的应力大于心部的应力,出现了双鼓的分布;单斜面模具的模角在8°时,板坯没有发生翘曲现象。翘曲高度随着模角的增加而增加,形成对称的抛物线形状。对于设计的4种双斜面模具结构,最优的模具结构是α为15°、β为25°、x为80 mm,其接触面积和压力的增幅最大。
Taking continuous forging large deformation process as the research object, a mathematical model of deformation process was established. The Marc finite element software was used to simulate the side pressure process and the mold structure was optimized. The results show that during the continuous forging large deformation process, the plastic deformation of the slab continuously increases, and the stress distribution in the slab shows a layered structure parallel to the surface. The stress at the four boundaries is greater than the stress in the core, Bevel mold angle of 8 °, the slab did not occur warping phenomenon. Warp height increases with die angle, forming a symmetrical parabolic shape. For the four double-inclined mold structures designed, the optimum mold structure is that α is 15 °, β is 25 ° and x is 80 mm, and the contact area and pressure increase most greatly.