斜轧穿孔机顶杆弯曲挠度及临界失稳力计算分析
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摘要
通过对斜轧穿孔过程中顶杆受力和运动约束进行分析,依据相关力学理论建立了顶杆临界弯曲失稳力和弯曲挠度分布计算模型。顶杆抗失稳能力随其直径和定心装置套数的增加迅速提高,随其长度的增加而减弱。顶杆最大弯曲挠度随顶杆阻力及顶杆长度的增加而增加,随其直径的增加而减小。在压力机上进行了压杆弯曲实验,证明了顶杆失稳弯曲变形不对称,当顶杆未安装定心装置时,最大弯曲挠度发生在距顶头端1/3顶杆长度位置;提出了在顶杆弯曲最大挠度点安装定心装置的新方法,可减少必需的定心装置套数并提高抗失稳能力。研究结果有助于预测顶杆失稳和确定定心装置套数及位置。
By analyzing the force and movement constraints of the mandrel during rotary piercing process,the calculation model of the distribution of critical bending unstable force and bending deflection of the mandrel was established based on the relevant mechanics theory. The stability resistance of the mandrel increases rapidly with the increase of mandrel diameter and the number of centering device sets,and decreases with the increase of the mandrel length. The maximum bending deflection of mandrel increases with the increase of the resistance and the mandrel length,and decreases with the increase of the mandrel diameter. The compression mandrel bending experiment was conducted on pressure machine,and the bending deflection deformation was confirmed to be asymmetric. The maximum bending deflection appears was one third of the mandrel length when none of the centering device is installed. A new method to install a centering device at the position where the maximum bending deflection appears was proposed which can satisfy the purpose of saving the number of centering device sets and improving the ability of unstable resistance. The research results can provide credit help for predicting mandrel instability and determining the number of centering device sets and the installation positions.
By analyzing the force and movement constraints of the mandrel during rotary piercing process,the calculation model of the distribution of critical bending unstable force and bending deflection of the mandrel was established based on the relevant mechanics theory. The stability resistance of the mandrel increases rapidly with the increase of mandrel diameter and the number of centering device sets,and decreases with the increase of the mandrel length. The maximum bending deflection of mandrel increases with the increase of the resistance and the mandrel length,and decreases with the increase of the mandrel diameter. The compression mandrel bending experiment was conducted on pressure machine,and the bending deflection deformation was confirmed to be asymmetric. The maximum bending deflection appears was one third of the mandrel length when none of the centering device is installed. A new method to install a centering device at the position where the maximum bending deflection appears was proposed which can satisfy the purpose of saving the number of centering device sets and improving the ability of unstable resistance. The research results can provide credit help for predicting mandrel instability and determining the number of centering device sets and the installation positions.
引文
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[12]张迎春,宁艳平,罗辉.三辊定心装置在无缝钢管穿孔机上的应用[J].锻压技术,2013,38(1):85-88.ZHANG Yingchun,NING Yanping,LUO Hui.Application of three-roll centering device in seamless steel tube punch[J].Forging&Stamping Technology,2013,38(1):85-88.
[13]侯帅.三辊定心装置的定位调整及控制[J].轧钢,2013,30(5):29-30.HOU Shuai.Adjustment and control of three roller Guides[J].Steel Rolling,2013,30(5):29-30.
[14]张轶蔚,严伟,汤立刚.三辊导向装置连杆机构的仿真优化设计[J].机械传动,2015,(4):70-76.ZHANG Yiwei,YAN Wei,TANG Ligang.Optimal design of the linkage mechanism simulation of three-roller guiding device[J].Journal of Mechanical Transmission,2015,(4):70-76.
[15]李恩学.穿孔机三辊定心位置控制方法的应用[J].冶金动力,2016,(2):54-58.LI Enxue.Application of 3-roll centering position control method for boring machine[J].Metallurgical Power,2016,(2):54-58.
[16]李莉,龙沾明.新型三辊抱芯装置的机构设计[J].钢管,2007,36(5):27-30.LI Li,LONG Zhanming.Design of mechanism of new type threeroll plug steadier[J].Steel Pipe,2007,36(5):27-30.
[17]汪狄敏.三辊抱芯装置的机构设计[J].包钢科技,2003,29(3):52-54.WANG Dimin.The mechanism design of the three-roll plug steadier[J].Science and Technology of Baotou Steel(Group)Corporation,2003,29(3):52-54.
[2]HAYASHI C,AKIYAMA M,YAMAKAWA T.Advancements in cone-type rotary piercing technology[J].Journal of Manufacturing Science&Engineering,1999,121(3):313-320.
[3]PATER Z,BARTNICKI J,KAZANECKI J.3D finite elements method(FEM)analysis of basic process parameters in rotary piercing mill[J].Metalurgija,2012,27(3-4):257–263.
[4]JOUN M S,LEE J,CHO J M,et al.Comparative study on mannesmann roll piercing processes between Dieschers guiding disk and Stiefels guiding shoe[J].Procedia Engineering,2014,(81):197-202.
[5]张家良,陈江.Φ50 mm穿孔机后台架的改进[J].钢管,1994,23(2):29-31.ZHANG Jialiang,CHEN Jiang.Modification ofΦ50 mm piercer outlet table[J].Steel Pipe,1994,23(2):29-31.
[6]王文章,杨德照,刘素华,等.简析Φ600 mm穿孔机组新结构[J].钢管,2012,41(6):26-29.WANG Wenzhang,YANG Dezhao,LIU Suhua,et al.A brief discussion on a new structure ofΦ600 mm piercing plant[J].Steel Pipe,2012,41(6):26-29.
[7]赵宏彬.穿孔机前后台设备选型分析及工程应用[J].冶金设备,2012,41(1):61-65.ZHAO Hongbin.Selection analysis and engineering application of the front and back table equipment in the piercing mill[J].Metallurgical Equipment,2012,41(1):61-65.
[8]杨德照,李亚凡,夏新潮,等.大型穿孔机顶杆预旋转装置的设计与研究[J].钢管,2012,41(1):55-57.YANG Dezhao,LI Yafan,XIA Xinchao,et al.Design and research of plug bar pre-rotating device for large piercing mill[J].Steel Pipe,2012,41(1):55-57.
[9]程波,朱旭甫,李聪杰,等.新型穿孔机预旋转装置的设计[J].冶金设备,2014,(2):38-39.CHEN Bo,ZHU Xufu,LI Congjie.Design of a new piercer re-rotation device[J].Metallurgical Equipment,2014,(2):38-39.
[10]高英南,王起干,干学义.新型三辊定心装置的研制与应用[J].钢管,1995,24(6):36-38.GAO Yingnan,WANG Qigan,GAN Xueyi.Development and application of a new type three-high centering system[J].Steel Pipe,1995,24(6):36-38.
[11]孙斌煜,张洪.三辊液压定心装置在穿孔机上的应用[J].钢管,2006,35(3):36-38.SUN Binyu,ZHANG Hong.Application of hydraulically-driven three-roll centering system of pipe piercing mill[J].Steel Pipe,2006,35(3):36-38.
[12]张迎春,宁艳平,罗辉.三辊定心装置在无缝钢管穿孔机上的应用[J].锻压技术,2013,38(1):85-88.ZHANG Yingchun,NING Yanping,LUO Hui.Application of three-roll centering device in seamless steel tube punch[J].Forging&Stamping Technology,2013,38(1):85-88.
[13]侯帅.三辊定心装置的定位调整及控制[J].轧钢,2013,30(5):29-30.HOU Shuai.Adjustment and control of three roller Guides[J].Steel Rolling,2013,30(5):29-30.
[14]张轶蔚,严伟,汤立刚.三辊导向装置连杆机构的仿真优化设计[J].机械传动,2015,(4):70-76.ZHANG Yiwei,YAN Wei,TANG Ligang.Optimal design of the linkage mechanism simulation of three-roller guiding device[J].Journal of Mechanical Transmission,2015,(4):70-76.
[15]李恩学.穿孔机三辊定心位置控制方法的应用[J].冶金动力,2016,(2):54-58.LI Enxue.Application of 3-roll centering position control method for boring machine[J].Metallurgical Power,2016,(2):54-58.
[16]李莉,龙沾明.新型三辊抱芯装置的机构设计[J].钢管,2007,36(5):27-30.LI Li,LONG Zhanming.Design of mechanism of new type threeroll plug steadier[J].Steel Pipe,2007,36(5):27-30.
[17]汪狄敏.三辊抱芯装置的机构设计[J].包钢科技,2003,29(3):52-54.WANG Dimin.The mechanism design of the three-roll plug steadier[J].Science and Technology of Baotou Steel(Group)Corporation,2003,29(3):52-54.