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本文对强制润滑深拉深进行变形力学分析,导出了拉深应力公式,求出极限拉深系数;提出了拉深力和凹模腔内液休压力的理论计算公式。同时进行了系统的实验测示,计算结果和实验测示相符。在实验的基础上,给出了强制润滑深拉深的合理单位压边力及其它工艺参数。通过对几种常用材料的圆筒形零件的拉深实验表明,强制润滑深拉深其变形程度大,一次拉深的最小拉深系数达0.37,拉深高度与直径比大于1.3—1.5;拉深零件质量高,凹模不易磨损,工艺装置简单,是一种经济效益显著的深拉深新工艺。
In this paper, the deformation mechanics analysis of the deep drawing of forced lubrication is carried out, the formula of drawing stress is deduced, and the ultimate drawing coefficient is obtained. The theoretical formula of drawing force and liquid pressure in the cavity is proposed. At the same time, a systematic experimental test was performed. The calculated results are consistent with the experimental measurements. Based on the experiment, a reasonable unit blank holder force of forced deep drawing and other process parameters are given. Through the deep drawing experiments of several commonly used cylindrical parts, it shows that the depth of deformation of forced lubrication is large, the minimum drawing coefficient of one drawing is 0.37 and the ratio of drawing height to diameter is larger than 1.3-1.5. Deep parts of high quality, die is not easy to wear, process device is simple, is a significant economic benefits of deep drawing new technology.