本文描述了用铝坯料通过拉深工艺成形皮碗的实验。比较了两套类似的工具，一套有氮化钛涂层，另一套没有涂层。在每一组中，不同边缘半径的冲头和模具以不同的组合使用。观察和分析了这些几何参数的影响、氮化钛涂层对极限拉伸比的好处，以及所需的冲压力。

THIS PAPER DESCRIBES EXPERIMENTS IN WHICH CUPS WERE FORMED USING ALUMINUM BLANKS BY THE DEEP DRAWING PROCESS. TWO SIMILAR SETS OF TOOLS, ONE WITH A TITANIUM NITRIDE COATING AND THE OTHER WITHOUT, WERE COMPARED. IN EACH SET, PUNCHES AND DIES OF DIFFERENT EDGE RADII WERE USED IN VARIOUS COMBINATIONS. THE EFFECTS OF THESE GEOMETRICAL PARAMETERS, THE BENEFITS OF TITANIUM NITRIDE COATINGS UPON THE LIMITING DRAW RATIO, AND PUNCH FORCE REQUIRED WERE OBSERVED AND ANALYZED.