图1所示框架是用角铁弯制,在下料时如何计算一直是困扰我们的难题,后经研究,探讨如下。 图2为框架成品的 一角,显而易见,图中 以r为半径的1/4圆 部分应预先处理掉,方 能保证顺利弯曲。经过 这样处理,可看作是对 一厚为δ的板材进行弯 制,它的内侧受挤压,外侧被拉伸,必有一中间层,即图示FG层,在弯制 The frame shown in Figure 1 is made of angle iron, and how to calculate it in the blanking has always been a problem that plagued us. After the study, it is discussed as follows. Figure 2 is the corner of the frame finished product, it is clear that the figure to r radius of 1/4 circle part should be pre-processed to ensure smooth bending. After this treatment, can be seen as a thick sheet of δ for bending, the inside of the extrusion, the outside is stretched, there must be an intermediate layer, that FG layer shown in the bending