无芯模旋压道次规划方法研究（英文）

发布时间：2018-04-15 23:03

本文选题：无芯模旋压 + 道次规划　；参考：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》2017年06期

【摘要】：目的:通过优化无芯模旋压轨迹提高成形件形状精度,同时保持壁厚以防止过度减薄。创新点:针对轨迹形状设计,提出利于形状误差抑制的"几何相似性原则"和利于壁厚保持的"小曲率原则"。针对道次间距设计,提出利于形状误差抑制的终道次"大变形量原则"和利于壁厚保持的"变形量均匀分配原则"。方法:首先,根据不同的前道次轨迹形状与目标件复杂轮廓形状的结合衍生出四种成形方式(表1)。通过试验比较不同成形方式对成形件形状精度和壁厚的影响。而后比较等道次倾角差(EPA)、等外径差(EDD)和等平均环向应变(EHS)成形量分配方法对成形质量的影响(图13~16)。最后,根据终道次对成形质量的关键性影响,提出基于终道次优先的等平均径向应变道次轨迹规划方法。结论:基于终道次优先的等平均径向应变道次轨迹(RF+(FPEHS))规划方法,能够在有效抑制形状偏差和提高形状精度的同时较好地保持壁厚以防止过度减薄,是一种较优的道次轨迹规划方法。
[Abstract]:Objective: to improve the shape accuracy of the forming parts by optimizing the spinning path of the coreless die while keeping the wall thickness to prevent excessive thinning.Innovation: for trajectory shape design, the "geometric similarity principle" and the "small curvature principle" which are favorable to shape error suppression and wall thickness preservation are proposed.According to the design of the interval, the "large deformation principle" and the "uniform distribution principle" of the end pass are put forward, which are favorable to the shape error suppression and the wall thickness keeping.Methods: firstly, four kinds of forming methods were derived according to the combination of different previous trajectory shapes and complex contour shapes of target parts (Table 1).The effects of different forming methods on the shape accuracy and wall thickness of forming parts were compared by experiments.Then, the effects of equal pass inclination difference (EPAA), equal outer diameter difference (EDDD) and equal mean circumferential strain (EHS) on the forming quality were compared (Fig. 1316).Finally, according to the critical effect of end-pass on forming quality, an equal-average radial strain path path planning method based on end-pass priority is proposed.Conclusion: the equal-average radial strain track trajectory planning method based on end-pass priority can effectively suppress shape deviation and improve shape accuracy, while keeping wall thickness to prevent excessive thinning.It is an optimal path path planning method.
【作者单位】： State
【基金】：Project supported by the Zhejiang Provincial Natural Science Foundation of China(No.LY15E050003) the National Natural Science Foundation of China(No.51675470) the Fundamental Research Funds for the Central Universities,China(No.2015QNA4003)
【分类号】：TG306

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