金属材料的各种力学性能及其板材的冲压性能,例如屈服点σ_s、规定非比例伸长应力σ_p、抗拉强度σ_b、塑性应变比γ值、拉伸应变硬化指数 n 值等等,都可以通过标准试样的拉伸试验而得到。日前,国内对这些性能的测定大部分采用读数法或作图法,即缓慢加载、逐点读数、记录或作出拉伸曲线,然后人工整理实验结果。用这种方法测定各种性能,不仅速度慢,而且综合误差较大。我们从研究金属材料的力学及冲压性能的需要出发,研制了 JLC—I 型金属材料拉伸 Various mechanical properties of metal materials and sheet metal stamping properties, such as yield point σ_s, provides non-proportional elongation stress σ_p, tensile strength σ_b, plastic strain ratio γ value, tensile strain hardening index n value, etc., can be Obtained by the tensile test of a standard specimen. Recently, most of the domestic measurement of these properties using the reading method or mapping method, that is slowly loaded, point by point readings, record or make the tensile curve, and then manually organize the experimental results. Using this method to measure a variety of properties, not only slow, and the larger the overall error. We study the mechanical properties of metal materials and stamping performance needs, developed a JLC-I-type metal material stretching