载重汽车的纵梁和横梁,一般都是用钢板在机械压力机或液压机上加工的。其工序有二:先进行剪切和冲孔,然后拉伸成凵形梁。梁的形状和板料厚度与各种汽车的结构有关系。对大梁的尺寸精度要求,特别是对底面平直度和侧边垂直度的要求都在不断地提高。同时对材料质量的要求也越来越高。目前,加工的板料抗拉强度在65公斤/毫米~2以上,例如材料FB65Q。这种发展,需要用较大的压力。本文介绍设计板料成形液压机应考虑的重要因素,并介绍两种现代的板料成形液压机。同时报导了研究的情况。一、单用途或多用途压机的选择 Rigid beams and beams, are generally used in the mechanical plate or hydraulic press machine processing. The process has two: first cut and punching, and then stretch into 凵 shaped beam. The shape of the beam and the thickness of the sheet are related to the structure of the various cars. The requirements on the dimensional accuracy of the girder, especially on the flatness of the bottom and the verticality of the side, are constantly increasing. At the same time the material quality requirements are getting higher and higher. At present, the tensile strength of the processed sheet is above 65 kg / mm ~ 2, for example, material FB65Q. This kind of development needs more pressure. This article describes the important factors that should be considered in designing sheet metal forming presses and introduces two modern sheet metal forming presses. At the same time reported the research. A single or multi-purpose press choice