双旋转毂式矫直机的参数研究及矫直效果分析

发布时间：2018-02-02 13:09

本文关键词： 转毂式矫直电镍导电棒矫直参数矫直质量有限元模拟　出处：《昆明理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：在国民经济快速发展的今天,镍这种多功能型的金属材料被越来越多的行业所应用。目前世界上生产镍以电解精炼方法为主,电流经电解槽流向导电棒,经吊耳流向种板。但是导电棒在使用过程中常因为受载、敲打等原因发生弯曲变形。使用弯曲变形的导电棒会影响电镍的电解效率和制作始极片的自动化程度,严重的会发生安全事故,所以导电棒再次使用前必须进行矫直。国内现在存在管棒材专用的矫直机,但是因为矫直精度低、矫直质量不稳定、存在矫直盲区等原因没被大部分企业认可接受。转毂式斜辊矫直机是一种新型的矫直装置,可以用于矫直导电棒,但是因为结构参数设置、工艺参数调节等原因使转毂式斜辊矫直机不能很好满足生产实际需要。本课题以转毂式斜辊矫直机为研究对象,利用单旋转毂式矫直机随机对50根电镍导电棒进行实验并测量其矫直前后的平直度,从而发现该种矫直机的弊端并在此基础上进行设计和改进。根据金属弹塑性弯曲理论,分析了强化金属材料管材在弯曲时的塑性区变形分布规律,并建立了管材弯曲时的曲率比方程和弯矩比大小;推导出管材弯曲时的能量比和精度范围。在单旋转毂式矫直机的工作原理基础上,得到双旋转毂矫直机的简化力学模型和压弯挠度,分析了其矫直优点,设计了辊子排布方式,计算了辊距、辊形等机构参数和矫直速度、辊子斜角等工艺参数。应用有限元分析软件Deform 3D进行模拟仿真,对导电棒从咬入到稳定矫直再到顺利抛出的矫直过程进行动态观察,对矫直过程中导电棒的等效应力分布和矫后导电棒平直度进行了着重分析研究。采用单一变量法分别研究了转毂的旋向、拉料速度差以及螺旋导程对矫直效果的影响。本文将实验分析和有限元模拟结合起来对导电棒的矫直过程进行研究,结合单旋转毂式矫直机的不足,设计出双旋转毂式矫直机,并研究特定的矫直参数对矫直效果的影响,为双旋转毂式矫直机的设计和实际矫直提供了理论依据,具有一定的实用价值和指导意义。
[Abstract]:With the rapid development of the national economy, nickel, a multifunctional metal material, has been used in more and more industries. At present, nickel is produced mainly by electrolytic refining, and the current flows to the conducting rod through the electrolytic cell. However, during the use of conductive rods, bending deformation often occurs due to load, beating and other reasons. The use of bending deformed conductive rods will affect the electrolysis efficiency of nickel electrolysis and the automation degree of the initial electrode. Serious safety accidents will occur, so the conductive rod must be straightened before re-use. There is a special straightener for tube bar in China now, but because of the low straightening accuracy, the straightening quality is unstable. The reason of straightening blind area is not accepted by most enterprises. The hub inclined roll straightener is a new type of straightening device, which can be used to straighten the conductive rod, but because of the structure parameter setting. The adjustment of process parameters makes the hub tilting roller straightening machine can not meet the actual production needs well. This topic takes the hub type inclined roll straightening machine as the research object. A single rotating hub straightener was used to test 50 electric nickel conducting rods at random and the straightness before and after straightening was measured. Based on the theory of metal elastic-plastic bending, the deformation distribution law of plastic zone of reinforced metal pipe in bending is analyzed. The curvature ratio equation and bending moment ratio are established. Based on the working principle of single rotating hub straightener, the simplified mechanical model and bending deflection of double rotating hub straightener are obtained, and the advantages of straightening are analyzed. The arrangement of roller is designed, and the parameters of roller spacing, roll shape, straightening speed and roll angle are calculated. The finite element analysis software Deform 3D is used to simulate and simulate. The dynamic observation was carried out on the straightening process of conducting rod from biting in to stabilizing straightening and then to throwing out smoothly. The equivalent stress distribution of conducting rod and the straightness of conducting rod after straightening are studied emphatically. The rotation direction of the hub is studied by single variable method. In this paper, the experimental analysis and finite element simulation are combined to study the straightening process of the conductive rod, combined with the shortcomings of the single rotating hub straightener. The double rotating hub straightener is designed, and the influence of certain straightening parameters on the straightening effect is studied, which provides a theoretical basis for the design and practice of the double rotating hub straightener. It has certain practical value and guiding significance.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TG333.23

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