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初紧和终紧扭剪型高强螺栓都必须用扭剪型电动扳手吗

来源:https://www.xjnwz.com 日期:2020-09-18 发布人:admin

bai终紧扭剪型高强螺栓必须用扭剪型电动扳du手,因为扭剪型高强zhi螺栓的终紧必须要把它的梅花头打dao断,只有扭剪型电动扳手才能。现在高强螺栓的分类分为大六角高强螺栓和扭剪型高强螺栓,每种高强螺栓的紧固都必须先初紧再终紧。

For the final tightening of high-strength bolts, the twist shear type electric wrench must be used, because the final tightening of the torsional shear high-strength bolt must break its plum head, only the torsional shear type electric wrench can. At present, high strength bolts are classified into large hexagon high strength bolts and torsion shear high strength bolts. Each kind of high strength bolts must be tightened initially and then finally.
电动扭矩扳手
高强螺栓的紧固都必须先初紧再终紧,扭剪型高强螺栓的初紧可以选择冲击电动扳手、定扭矩电动扳手或扭剪型电动初紧扳手,并且一般达到终紧扭矩的50-60%就可以了。
High strength bolts must be tightened first and then finally. For the initial tightening of high-strength bolts, impact electric wrench, constant torque electric wrench or torsion shear type electric initial tightening wrench can be selected, and generally reach 50-60% of the final tightening torque.
特殊状态下可以允许用扭距扳手按大六角高强螺栓的作业方法代替,只需达到相当的扭矩,保证相应轴力即可,梅花头保留无妨。
Under special conditions, it is allowed to use torque wrench to replace the operation method of large hexagon high strength bolt. It only needs to reach a certain torque and ensure the corresponding axial force, and the plum head can be retained.