小直径直缝焊管柔性成形机设计研究

发布时间：2018-04-29 19:42

本文选题：小直径焊管 + 辊弯成形　；参考：《南京理工大学》2017年硕士论文

【摘要】：随着智能机械制造技术的发展,辊弯成形技术不断成熟,柔性辊弯成形越来越受企业的青睐。为了迎合这一趋势,本文针对小直径直缝焊管柔性辊弯成形的关键技术进行了研究,本文的主要内容如下:首先本文论述了直缝焊管成形机组的理论研究现状,介绍了国内外的研究现状,并提出针对小直径直缝焊管柔性辊弯成形机组的研究。其次,主要阐述了带钢在辊弯成形中变形原理与特点,总结了直缝焊管柔性成形的原理,确定柔性辊弯成形的方案,描述了柔性辊弯成形机组中各个成形段的结构特点。再次,本文主要是利用三半径成形法进行变形图设计,根据分组平辊与排辊变规格成形调整的需要,找出所需成形排辊成形道数,修正不同直径管由于成形辊位置调整辊的形状对变形图的影响,计算出Ф50mm、Ф90mm直缝焊管的辊花图设计参数,并绘制出辊花图。最后通过有限元模拟板带的成形过程,分析板带的横向等效塑性应变、纵向应变、及横向相对曲率分布,为辊弯成形机架结构设计提供依据。最后,设计小直径直缝焊管的成形机组。由于辊弯成形不同成形段所需要的机组有相似部分,本文为了简化柔性成形机组结构尽量减少机架类形,主要设计出以下机架:钢带的校平装置,W平辊机架,分组平辊机架和排辊立辊机架,通过这几种机架的组合构成整个柔性机组,然后根据设计好的机架,针对W平辊机架计进行模拟仿真,得出机架应力应变云图,以及变形图,并验证设计的合理性。对实际的焊管成形具有一定的借鉴意义。
[Abstract]:With the development of intelligent mechanical manufacturing technology, roll bending technology is becoming more and more mature, flexible roll forming is becoming more and more popular in enterprises. In order to meet this trend, the key technology of flexible roll bending forming of small diameter straight welded pipe is studied in this paper. The main contents of this paper are as follows: firstly, this paper discusses the present situation of the theoretical research of straight welded pipe forming machine. This paper introduces the research status at home and abroad, and puts forward the research of flexible roll forming machine for small diameter straight welded pipe. Secondly, the deformation principle and characteristics of strip steel in roll bending forming are expounded, the principle of flexible forming of straight welded pipe is summarized, the scheme of flexible roll forming is determined, and the structural characteristics of each forming section in flexible roll forming machine group are described. Thirdly, this paper mainly uses the three-radius forming method to design the deformation diagram, according to the needs of adjusting the forming of the group flat roll and the row roll, find out the number of the forming pass of the forming roll. Due to the influence of roll shape on deformation diagram of different diameter tubes, the design parameters of roll pattern of 50 mm and 90mm straight seam welded pipe are calculated and the roll pattern is drawn. Finally, the transverse equivalent plastic strain, longitudinal strain and transverse relative curvature distribution are analyzed by simulating the forming process of sheet and strip by finite element method, which provides the basis for the structural design of roll bending forming frame. Finally, the forming machine of small diameter straight welded pipe is designed. In order to simplify the structure of flexible forming unit and reduce the shape of frame as much as possible, the following frame is designed: the leveling device of steel strip and the flat roll frame. Divided into flat roll frame and row roll vertical roller frame, through the combination of these several kinds of frame constitute the whole flexible unit, then according to the designed frame, carry on the simulation for W flat roll rack gauge, obtain the frame stress strain cloud diagram, as well as the deformation diagram, The rationality of the design is verified. It has certain reference significance to the actual welded pipe forming.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TG305

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