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正方形件的拉深工艺计算方法是矩形件拉深工艺计算的基础。本文从沿周边拉深变形程度尽可能达到均匀的设想出发,取周边平均拉深系数 m_(cp)与角部拉深系数 m_y 相等来求得合理的角间距δ=0.11r。采用角间距δ=0.11r 来进行正方形件末次拉深,其拉深系数为0.9,这数值已大于大部分材料的逐次拉深的最小拉深系数(m_n)。所以,大部分材料均能从圆筒形一次拉深得到正方形件。对于带凸缘的正方形件,其末次拉深必须满足沿周边拉深变形程度均匀的条件,采用角间距δ=0.11r 来进行带凸缘正方形件末次拉深,可得到理想的效果。本文介绍按参数δ=0.11r 进行正方形件拉深试验的结果,并对正方形件拉深工艺计算提出几点设想。
The drawing process of the square part is the basis of the calculation of the rectangular part drawing process. In this paper, starting from the assumption that the extent of deformation along the perimeter is as uniform as possible, a reasonable angular spacing δ = 0.11r is obtained by equating the averaged drawing coefficient m_ (cp) with the corner drawing coefficient m_y. For the last drawing of the square part with the angular spacing δ = 0.11r, the drawing coefficient is 0.9, which is larger than the minimum drawing coefficient (m_n) of most materials. Therefore, most of the material can be obtained from the cylindrical shape of a square drawing. For flanged square pieces, the last drawing must satisfy the condition of uniform deformation along the periphery. Using the angular spacing δ = 0.11r for the last drawing with flanged square pieces, the desired effect can be obtained. In this paper, we introduce the result of square part drawing test with parameter δ = 0.11r, and put forward several ideas for the drawing process of square part.