金属冲件的弹性变形,在一定的条件下,是客观存在的。决定这种变形的主要因素有:间隙、厚度、结构及刃口的圆角。这点,笔者曾在去年本刊第三期《论弹涨系数》一文中指出。这里仅对其中某些内容作些补充说明。 一、间隙对弹涨系数影响的试验 间隙是冲裁中的一项重要因素。间隙的大小不仅涉及到模具的寿命,而且影响到冲件的精度。所以,根据冲件的精度要求。选择合理的冲裁间隙是非常必要的。我们在弹 Metal pieces of elastic deformation, under certain conditions, is an objective reality. The main factors that determine this deformation are: gap, thickness, structure and edge fillet. This point, I wrote in the third issue of last year, “on the bullet coefficient,” a article pointed out. Here only some of these contents for some additional explanation. First, the gap on the run-up coefficient of the test gap is an important factor in blanking. The size of the gap involves not only the life of the mold but also the accuracy of the punch. So, according to the accuracy requirements of pieces. Choose a reasonable blanking gap is very necessary. We are playing