扭剪型螺栓使用扭剪型扳手施工,其根部使用正反向扭桿直接通過“梅花頭”夾緊螺桿本身,故施擰時不會發(fā)生同轉(zhuǎn)現(xiàn)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:利用螺桿達(dá)到預(yù)拉力值時,材料所能承受對應(yīng)的剪力,來設(shè)計削弱梅花頭的根部截面,達(dá)到剪斷的目的。在施加扭矩聚集材料內(nèi)拉應(yīng)力達(dá)到設(shè)計值(“緊固軸力”)的同時,其材料的對應(yīng)抗剪強度恰好能使梅花頭削弱截面擰斷。
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.
