辊位参数对大口径薄壁焊管成型质量的影响

发布时间：2018-01-06 03:45

本文关键词：辊位参数对大口径薄壁焊管成型质量的影响　出处：《武汉科技大学》2016年硕士论文　论文类型：学位论文

【摘要】：排辊成型技术是一种较为先进的直缝焊管生产技术,目前国内先进的排辊成型机组主要是从国外引进,但是供应商却对设备的设计和开发技术保密,导致国内厂家开发新产品尤其是生产大口径薄壁焊管时,技术人员往往只能以现场试生产时出现的产品缺陷凭直觉、经验反复调整辊位来解决,具有盲目性,也增加了人力、物力和时间成本。基于此背景,本文针对HFW660直缝焊管排辊成型机组,以用X60管线钢生产Φ508mm、壁厚6.2mm的焊管为例,使用数值仿真技术探究了辊位参数对大口径薄壁焊管成型质量的影响。使用ABAQUS对焊管排辊成型过程进行全流程仿真,将仿真结果与现场测量数据进行对比,验证了所建立模型的正确性。对仿真结果分析发现:排辊成型段变形量小,会将较大变形量集中到精成型第一道次处;最大纵向应变在边部,容易产生边浪和鼓包;最大应力、等效塑性应变均在带钢边缘。在此基础上,对辊位参数进行调整,以期获得较优的工艺参数。由于轧辊数量大,以调整后的成型底线和开口度来表示整体新的辊位,结果表明:下山量不合适,会影响管坯边部的成型质量,在保证边部形态好的前提下,通过调整排辊减小开口度,可以增大排辊成型段的变形量,使带钢的变形更加充分。该研究旨在为现场生产消除缺陷和工艺优化提供参考。
[Abstract]:Row roll forming technology is a relatively advanced production technology of straight seam welded pipe. At present, the advanced domestic roll forming machine is mainly imported from abroad, but the supplier keeps secret the design and development technology of the equipment. As a result, when domestic manufacturers develop new products, especially the production of large-caliber thin-walled welded pipes, technicians can only rely on intuition and experience to adjust the roller position by intuition and experience, which is blind. The manpower, material resources and time cost are also increased. Based on this background, this paper deals with the production of 桅 508mm by using X60 pipeline steel for HFW660 straight-welded pipe row roll forming machine. The influence of roll position parameters on the forming quality of large-caliber thin-walled welded pipe was investigated by numerical simulation technique for the welded pipe with a wall thickness of 6.2 mm. ABAQUS was used to simulate the whole process of the forming process of the welded pipe. The simulation results are compared with the field measurement data to verify the correctness of the established model. The simulation results show that the deformation of the roll forming section is small and the large deformation will be concentrated at the first step of the fine forming. The maximum longitudinal strain is at the edge, which is easy to produce edge-wave and bulging. The maximum stress and equivalent plastic strain are all at the edge of the strip. On this basis, the roll position parameters are adjusted in order to obtain better technological parameters. The new roll position is expressed by adjusting the bottom line and the opening degree. The result shows that the inappropriate downhill quantity will affect the forming quality of the tube billet edge and ensure the good shape of the edge part. By adjusting the row roll to reduce the opening degree, the deformation of the forming section of the row roll can be increased, and the deformation of the strip steel can be made more fully. This study aims to provide a reference for the field production to eliminate defects and optimize the process.
【学位授予单位】：武汉科技大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TG306

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