筒形零件强制润滑拉深中极限变形程度的研究(CAD与proE)

筒形零件强制润滑拉深中极限变形程度的研究
摘要
本文主要说明的是在零件被拉深时考虑到材料的流动性及摩擦还有塑性变形等的综合因素对筒形零件的成型产生的影响。对强制润滑拉深进行变形力学分析，阐述了拉深与强制润滑拉深的变形过程及原理，导出了拉深应力公式，求出极限拉深系数。同时进行了系统的实验测示以及结合以往资料的结论，证明了实验的合理性。以及结合理论分析与实际例证给出了一些对影响拉深极限变形的因素。
通过对几种常用材料的筒形零件的拉深试验表明，强制润滑拉深其变形程度大，一次拉深最小拉深系数达0.37，相比常规润滑拉深的最小拉深系数要小0.18以上；拉深高度与直径比大于1.3也要比常规润滑拉深要高出0.12以上；所以强制润滑拉深能显著的提高拉深的成形极限，本文众多的实验数据也能证明这一点。而且所用的拉深模具也不复杂，在许多方面优于弹性凹模和工具模拉深。强制润滑拉深件质量高，凹模不易磨损；工艺装置简单，是一种经济效益显著的拉深工艺。

关键词　强制润滑；拉深；极限变形；筒形零件
Forced lubrication of cylinders in drawing the maximum reduction of Summary
Abstract
This paper shows that deep in the part pulled into account the mobility and friction materials have a combination of factors such as plastic deformation on the cylindrical part of the forming impact. Drawing on the forced lubrication for mechanical analysis of deformation, described drawing drawing and lubrication to the deformation process and the principle of drawing stress formula is derived, obtained limiting drawing coefficient. The same time the system combined with previous experimental measurements and data show the conclusion that the experiment is reasonable. And the combination of theoretical analysis and practical examples are given some of the impact of the factors drawing the limit deformation.
Through the barrel of several commonly used materials, deep drawing parts of the test showed that the lubrication to a large degree of drawing deformation, one drawing the smallest drawing coefficient of 0.37, compared to conventional minimum lubrication drawing coefficient is smaller than 0.18 ; deep drawing height to diameter ratio greater than 1.3 is also drawing more than conventional lubrication to higher than 0.12; so the lubrication drawing can significantly improve the deep drawing forming limit, this large number of experimental data to prove this point. And dies used in drawing is not complicated and in many ways better than the flexibility and tools to model the die drawing. Forced lubrication of deep drawing parts of high quality, die hard wear; process simple device, is a significant economic benefit drawing technology.

Keywords  foreed lubrieating;Tensile; Limit deformation；Barrel Parts

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