The exposed length of the steel structure bolt is not e […]
The exposed length of the steel structure bolt is not enough. It should be replaced with a longer bolt. The bolt and the nut cannot be welded together by electric welding. This operation has the following drawbacks:
1. The strength of bolts and nuts that are welded by electric welding will be greatly reduced, because electric welding is a process of melting and recrystallization of materials. The bolt is originally a key connector, and the recrystallization after high temperature causes the mechanical of the bolt and nut material. Performance is severely degraded.
2. The welding stress existing in welding will cause the bolt and nut to be easily broken and the danger of fracture
3. The bolts and nuts that are welded together are not easy to disassemble. When the pre-tightening force is insufficient, the bolts and nuts are welded, and there is no way to tighten the bolts and nuts.
Therefore, if the exposed length of the steel structure bolt is not enough, the longer bolt should be replaced.