一、前言衡量薄板冲压成形性能尺度的有塑性变形比(R值)和加工硬化系数(n值)。川崎制铁株式会社已制作了能借助拉伸试验直接测定这些值的装置,而不需要烦琐的计算。下面就介绍该装置的概况。 First, the foreword Measuring the sheet metal forming performance scale plastic deformation ratio (R value) and work hardening coefficient (n value). Kawasaki Steel Co., Ltd. has produced a device that can directly measure these values ​​by means of a tensile test without requiring cumbersome calculations. The following describes the device overview.