What is the difference between large hexagonal high-strength bolts and torsion shear high-strength bolts?
What is the difference between large hexagonal high-strength bolts and torsion shear high-strength bolts?
High strength bolts are mainly used in steel structural engineering to connect the connection points of steel structural steel plates. High strength bolts can be divided into two types based on construction technology: large hexagonal high-strength bolts and torsional shear type high-strength bolts. Their connection performance and mechanical properties are the same, and the axial force of the bolts is determined by the torque size. However, fundamentally, there are still significant differences between the two. Let's take a look at the difference between large hexagonal high-strength bolts and torsional shear type high-strength bolts.
1. From the perspective of appearance
The appearance of high-strength bolts with large hexagonal heads is different from that of torsion shear type high-strength bolts, and the large hexagonal head is a hexagonal type. The torsion shear type head is semi circular, and there is also a plum blossom head at the end of the bolt.
For steel structures: large hexagonal bolts, nuts, washers
Steel structure: torsion shear type high-strength bolt connection pair
2. From the perspective of installation method
Install high strength bolts with large hexagonal heads using a torque wrench. During the installation process of torsional shear type high-strength bolts, they are controlled by the plum blossom head at the tail, and the reverse force of the torque is used to tighten the bolts in reverse until the straight toothed tail end of the bolts is broken.
3. From the perspective of supporting methods
The matching of large hexagonal high-strength bolts and torsion shear high-strength bolts is different. Each set of large hexagon is equipped with one bolt, one nut, and two flat washers. The torsion shear type consists of a bolt, a nut, and a flat washer.
4. From the perspective of torque control
The torque of large hexagonal high-strength bolts is controlled by construction tools, while torsion shear high-strength bolts belong to self scalar bolts. The construction tightening torque is determined by the diameter of the incision between the screw and the end of the bolt's plum blossom head, which is controlled by its breaking torque. Special electric wrenches should be used during construction.
Overall, large hexagonal high-strength bolts belong to the high-strength grade of ordinary screws, while torsional shear high-strength bolts are an improved version of large hexagonal high-strength bolts. Although they are the same type of bolt, there are still significant differences in some subtle aspects. Compared with the two, the torsional shear type high-strength bolt has the advantages of convenient construction, intuitive inspection, good stress, and quality assurance. It is widely used in high-rise steel structural engineering.
