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首页> 外文会议>National Conference on Precision Engineering(COPEN 2003-04); 20031219-20; Bangalore(IN) >Analysis of Die Clearance Distribution in a Presstool Assembly
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Analysis of Die Clearance Distribution in a Presstool Assembly

机译：压机装配中的模具间隙分布分析

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摘要

In the design of a precision presstool, it is necessary to assign tolerances to all dimensions. The combinations of these tolerances must be sufficiently tight to guarantee, that the tool will perform as intended. The quality of a presstool can be judged by the quality of the sheared surface of the blanked/pierced component. One of the critical parameter of the blanking/piercing operation is the die clearance. It is the diametrical clearance between the punch and die. Theoretically, the die clearance should be evenly distributed around the punch. But, when tolerances are assigned to various components of the presstool, uneven distribution of die clearance results, which affects the quality of the sheared surface. Experiments are conducted on samples with different die clearances. The samples are examined using microscope to determine the quality of the sheared surface. A mathematical equation is arrived to relate the dimensional tolerances of the presstool and the quality of the sheared surface on the samples.
机译：在精密压力机的设计中，必须为所有尺寸分配公差。这些公差的组合必须足够紧，以保证工具能够按预期运行。压制工具的质量可以通过冲切/冲切的组件的剪切表面的质量来判断。落料/冲孔操作的关键参数之一是模具间隙。它是冲头和模具之间的径向间隙。理论上，模具间隙应在冲头周围均匀分布。但是，当为压力机的各个组件分配公差时，会导致模具间隙的分布不均匀，从而影响剪切表面的质量。实验是在具有不同模具间隙的样品上进行的。使用显微镜检查样品以确定剪切表面的质量。得出了一个数学方程，将压力工具的尺寸公差与样品上剪切表面的质量联系起来。

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