基于超张拉伸的高强度螺栓预紧力控制方法  

Control Method of High-strength Bolt Pre-tightening Force Based on Overstretching

作　　者：李勇 阳雪兵 吴威 蔡帅 LI Yong;YANG Xue-bing;WU Wei;CAI Shuai(Harbin Electric Corporation Wind Power Co.,Ltd.,Xiangtan 411101,China)

机构地区：[1]哈电风能有限公司,湘潭411101

出　　处：《价值工程》2022年第20期65-67,共3页Value Engineering

摘　　要：预紧力衰减是高强度螺栓紧固时必然存在的问题,在螺栓采用拉伸法紧固时尤其突出,当衰减后的残余预紧力不能满足设计要求时,将威胁设备的运行安全。本文提出了超张拉伸补偿预紧力衰减的方法,通过理论假设和实际工况验证,对超张拉伸的参数选择、施工过程、适用范围做了初步探讨。Preload attenuation is an inevitable problem when high-strength bolts are fastened,especially when the bolts are tightened by the tension method.When the residual preload after attenuation cannot meet the design requirements,it will threaten the operation safety of the equipment.In this paper,a method for compensating for the attenuation of pretension force by overstretching is proposed,and the parameter selection,construction process,and application scope of overstretching are preliminarily discussed through theoretical assumptions and verification of actual working conditions.

关 键 词：高强度螺栓 预紧力衰减 残余预紧力 超张拉伸 

分 类 号：TF303[冶金工程—冶金机械及自动化]