Roller Design and Numerical Simulation of Three-roller Continuous and Synchronous Adjusting Straightness and Roundness Process on LSAW Pipes

doi:10.3901/JME.2021.10.148

Abstract

Abstract: The present straightening and rounding processes are performed individually. In order to achieve both the straightening and rounding processes simultaneously in a process and solve the problem of the ovality and straightness of LSAW pipes exceeding the standard after forming, a new three-roller continuous and synchronous adjusting straightness and roundness process on LSAW pipes is proposed. With the minimum ovality, straightness, and residual stress of LSAW pipes as the design objective, the numerical simulation of this process is carried out. The results show that the roller design scheme with “five sections” and the design ratio of the roller is 1∶2∶4∶2∶1 has better roundness and straightening effect. Besides, the ovality, straightness, and residual stress of the pipe are related to the elastic area ratio. The smaller the elastic area ratio is, the more unstable the micro-section of the pipe-wall will be. For the same material, the smaller the elastic area ratio is, the greater the deformation degree and the residual stress after deformation are. And when the elastic area ratio is 0.6 and 0.8, respectively, a good forming effect can be obtained. The roller curve of the rounding and straightening section is designed in the form of the hyperbola. The straightness of the pipe can reach 0.12%, and the ovality can reach 0.06%, meeting the industrial requirements of LSAW pipes. This process can realize the combined adjustment and control of straightness and ovality of LSAW pipes, thus shortening the production process and improving straightening and rounding efficiency.

Key words: LSAW pipes, straightness, ovality, residual stress, roller design, numerical simulation

CLC Number:

TG335

HUANG Xueying, YU Gaochao, ZHAI Ruixue, MA Rui, ZHOU Chao, GAO Cailiang, ZHAO Jun. Roller Design and Numerical Simulation of Three-roller Continuous and Synchronous Adjusting Straightness and Roundness Process on LSAW Pipes[J]. Journal of Mechanical Engineering, 2021, 57(10): 148-159.

References

[1] 李鹤林. 天然气输送钢管研究与应用中的几个热点问题[J]. 中国机械工程,2001,12(3):349-352. LI Helin. Some hot issues of research and application for natural gas transmission pipes[J]. China Mechanical Engineering,2001,12(3):349-352.
[2] ANSI/API Specification 5L,Specification for line pipe (forty-fifth edition)[S]. Washington:American Petroleum Institute,2012.
[3] 展培培,赵军,李平,等. 大型管件管端过弯矫圆三步法控制策略[J]. 材料科学与工艺,2014,22(2):97-103. ZHAN Peipei,ZHAO Jun,LI Ping,et al. Three steps control strategy of over-bending setting round for pipe-end of large pipes[J]. Materials Science and Technology,2014,22(2):97-103.
[4] 殷璟,赵军,屈晓阳,等. 大型管件扩径矫圆弹复分析[J]. 机械工程学报,2011,47(12):32-42. YIN Jing,ZHAO Jun,QU Xiaoyang,et al. Springback analysis of expanding and setting round for large diameter pipe[J]. Journal of Mechanical Engineering,2011,47(12):32-42.
[5] KARRECH A,SWIBI A. Analytical model for the expansion of tubes under tension[J]. Journal of Materials Processing Technology,2010,210(2):356-362.
[6] 殷璟,赵军,孙红磊,等. 大型管件的模压式精确缩径矫圆[J]. 光学精密工程,2011,19(9):2072-2078. YIN Jing,ZHAO Jun,SUN Honglei,et al. Precise compression and setting round by mold for large pipes[J]. Optics and Precision Engineering,2011,19(9):2072-2078.
[7] ZHAO Jun,ZHAN Peipei,MA Rui,et al. Prediction and control of springback in setting round process for pipe-end of large pipe[J]. International Journal of Pressure Vessels and Piping,2014,116(1):56-64.
[8] 展培培,赵军,尚京华,等. 大型管件管端过弯矫圆控制策略研究[J]. 中国机械工程,2013,24(9):1220-1224. ZHAN Peipei,ZHAO Jun,SHANG Jinghua,et al. Study on control policy of over-bending setting round for pipe ends of large pipes[J]. China Mechanical Engineering,2013,24(9):1220-1224.
[9] 于高潮,赵军,邢娇娇,等. 对称式三辊矫圆工艺研究[J]. 机械工程学报,2017,53(14):136-143. YU Gaochao,ZHAO Jun,XING Jiaojiao,et al. Research on the symmetrical three-roller setting round process[J]. Journal of Mechanical Engineering,2017,53(14):136-143.
[10] YU Gaochao,ZHAO Jun,ZHAI Ruixue,et al. Theoretical analysis and experimental investigations on the symmetrical three-roller setting round process[J]. The International Journal of Advanced Manufacturing Technology,2018,94(1/4):45-56.
[11] HUANG Xueying,YU Gaochao,ZHAO Jun,et al. Numerical simulation and experimental investigations on a three-roller setting round process for thin-walled pipes[J]. The International Journal of Advanced Manufacturing Technology,2020,107(16):355-369.
[12] DENG D,MURAKAWA H,LIANG W. Numerical and experimental investigations on welding residual stress in multi-pass butt-welded austenitic stainless-steel pipe[J]. Computational Materials Science,2008,42(2):234-244.
[13] LAW M,PRASK H,LUZIN V,et al. Residual stress measurements in coil,linepipe and girth welded pipe[J]. Materials Science and Engineering A,2006,A437(1):60-63.
[14] YAGHI A,HYDE T H,BECKER A A,et al. Residual stress simulation in thin and thick-walled stainless steel pipe welds including pipe diameter effects[J]. International Journal of Pressure Vessels and Piping,2008,83(11-12):864-874.
[15] 刘志亮,张立浦,刘才溢,等. 小断面管材二辊矫直机压扁量分析[J]. 钢铁,2014,49(8):54-58. LIU Zhiliang,ZHANG Lipu,LIU Caiyi,et al. Analysis of flattening amount of two-roller straightener for small section tubes[J]. Iron & Steel,2014,49(8):54-58.
[16] YU Gaochao,ZHAI Ruixue,ZHAO Jun,et al. Theoretical analysis and numerical simulation on the process mechanism of two-roller straightening[J]. The International Journal of Advanced Manufacturing Technology,2018,94(9-12):4011-4021.
[17] 赵军,宋晓抗,曹宏强,等. 大型直缝焊管多次三点弯曲压力矫直控制策略[J]. 哈尔滨工业大学学报,2014,46(1):90-96. ZHAO Jun,SONG Xiaokang,CAO Hongqiang,et al. Press straightening control strategy of multi-step three-point bending for LSAW pipes[J]. Journal of Harbin Institute of Technology,2014,46(1):90-96.
[18] 赵军,宋晓抗,曹宏强,等. 大型直缝焊管多点弯曲一次性矫直新工艺原理[J]. 机械工程学报,2014,50(2):92-97. ZHAO Jun,SONG Xiaokang,CAO Hongqiang,et al. Principle of multi-point bending one-off straightening process for longitudinally submerged arc welding pipes[J]. Journal of Mechanical Engineering,2014,50(2):92-97.
[19] 陈勇. 六辊矫直机辊型曲线设计方法探讨[J]. 钢管,2019,48(3):71-73. CHEN Yong. Discussion on roll profile curve design of 6-roll straightener[J]. Steel Pipe,2019,48(3):71-73.
[20] 刘志亮,刘才溢,杨士博,等. 复合辊型管材矫直机辊型设计及有限元仿真[J]. 锻压技术,2015,40(9):80-86. LIU Zhiliang,LIU Caiyi,YANG Shibo,et al. Design and numerical simulation analysis of roll shape on composite roller tubes straightener[J]. Forging & Stamping Technology,2015,40(9):80-86.
[21] 马立东,黄庆学,陈硕,等. 棒材二辊矫直机变曲率辊型优化[J]. 钢铁,2018,53(9):45-52. MA Lidong,HUANG Qingxue,CHEN Shuo,et al. Optimization of varying curvature profile of two-roll bar straightener[J]. Iron & Steel,2018,53(9):45-52.
[22] 王昌,胡志鑫. TA9管材十辊矫直过程仿真[J]. 现代制造技术与装备,2018(5):62-63. WANG Chang,HU Zhixin. TA9 tube ten roll straightening process simulation[J]. Modern Manufacturing Technology and Equipment,2018(5):62-63.
[23] 马自勇,马立峰,王荣军,等. 棒材高精度二辊矫直质量控制策略研究[J]. 机械工程学报,2017,53(20):77-88.MA Ziyong,MA Lifeng,WANG Rongjun,et al. Study on control strategies of two-roll straightening for bar high precision straightening[J]. Journal of Mechanical Engineering,2017,53(20):77-88.
[24] 王云. 矫直辊辊形曲线的设计计算与优化[J]. 钢管,2017,46(4):41-43. WANG Yun. Design calculation and optimization of roll shape curve of straightening rolls[J]. Steel Pipe,2017,46(4):41-43.
[25] 崔甫,杨会林. 对于矫直技术领域中一些认识新区的讨论[J]. 重型机械,2015(1):2-5. CUI Fu,YANG Huilin. New understanding in the field of straightening theory[J]. Heavy Machinery,2015(1):2-5.
[26] 于高潮,赵军,马瑞,等. 往复弯曲统一曲率定理及其试验验证[J]. 机械工程学报,2016,52(18):57-63. YU Gaochao,ZHAO Jun,MA Rui,et al. Uniform curvature theorem by reciprocating bending and its experimental verification[J]. Journal of Mechanical Engineering,2016,52(18):57-63.
[27] 赵军,于高潮,王浩然. 一种管材辊式连续矫形设备及加工方法:中国,201611012103.5[P]. 2016-11-17. ZHAO Jun,YU Gaochao,WANG Haoran. A roller-type continuous and synchronous adjusting straightness and roundness equipment and processing method for pipe:China,201611012103.5[P]. 2016-11-17.