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苏联罗曼诺夫斯基著《冷压手册》用(H/B)～(r/B)的关系图给出了盒形件一次拉深的成形极限。要确定一个盒形件能否一次拉深获得,只要根据盒形件的三个主要参数:宽度B、高度H和侧壁间的圆角半径r,就能从图上判断出来。国内的冲模设计资料都引用了这个图线。1979年版的罗氏《冷压手册》将盒形件的(H/B)～(r/B)图中一次拉深的范围扩大了一些,也就是将一次拉深成形极限提高了一些。然而超过1979年版罗氏《冷压手册》给出的一次拉深成形极限的盒
Soviet Union Romanovski “cold handbook” with (H / B) ~ (r / B) of the relationship between the box-shaped pieces of a drawing of the forming limit. To determine if a box can be drawn at a time, just look at the chart based on the three main parameters of the box: the width B, the height H, and the fillet radius r between the sidewalls. Domestic die design data are quoted this line. The 1979 edition of the Roche Cold Handbook expands the range of one draw at (H / B) ~ (r / B) in a box and increases the one-draw forming limit a little. However, it exceeded the box of the 1979 edition of the Cold Rolling Handbook for drawing a forming limit