本文应用滑移线场理论，研究了方盒形件拉深毛坯的展开尺寸计算方法，给出了有关的计算公式。

Applying the theory of slide line field, the paper discusses the method of determining the sizes of blank for square box and gives the relevant calculating formulae.

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具有特殊斜面的冲压件展开尺寸计算在众多的冲压工艺书籍和模具设计手册中鲜有论述，在实际工作中是个难题。

Calculation of development size of pressing with special incline is not discussed in many press technology books and die design manuals, and it is a difficult problem in real working.

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本文提出了复杂拉深件展开尺寸的计算方法。

In this paper calculation method of complex drawing piece on unfold size is given.

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