扭剪型螺栓使用扭剪型扳手施工,其根部使用正反向扭杆直接通过“梅花头”夹紧螺杆本身,故施拧时不会发生同转现象。
The torsion shear type bolt is constructed with a torsion shear wrench, and the root of the bolt is clamped by the forward and reverse torsion bar directly through the "plum head", so the phenomenon of simultaneous rotation will not occur when the bolt is screwed.
原理是:利用螺杆达到预拉力值时,材料所能承受对应的剪力,来设计削弱梅花头的根部截面,达到剪断的目的。在施加扭矩聚集材料内拉应力达到设计值(“紧固轴力”)的同时,其材料的对应抗剪强度恰好能使梅花头削弱截面拧断。
The principle is: when the screw reaches the pre tension value, the material can bear the corresponding shear force to design and weaken the root section of plum blossom head to achieve the purpose of cutting. At the same time, the corresponding shear strength of the material can just make the plum blossom head weaken the section to be broken.
