First, the stud specifications
1. Double-headed stud bm = 1dGB897-88;
2. Double-headed stud bm = 1.25dGB898-88;
3. Double-headed stud bm = 1.5dGB899-88;
4. Double-headed studs bm = 2dGB900-88;
5. Equal-length double-headed studs Class B GB901-88;
6. Welding studs GB902.1-89 for manual welding;
7. Welding studs for motor arc welding GB902.2-89;
8. Welding studs GB902.3-89 for energy storage welding;
9. Equal-length double-headed stud C-class GB953-88;
10. Screw GB / T15389-94.
Second, the use of studs
1. bm = 1d studs are generally used for the connection between two steel connected parts; bm = 1.25d and bm = 1.5d studs are generally used for the connected parts made of cast iron and steel. Bm = 2d double-headed studs are generally used for the connection between aluminum alloy connected parts and steel connected parts. The former connection piece has an internally threaded hole, and the latter connection piece has a through hole.
2. The threads at both ends of the equal-length double-headed studs must be matched with nuts and washers for two connected parts with through holes. One end of the welding stud is welded to the surface of the connected part, and the other end (threaded end) is passed through the connected part with a through hole, and then a washer is fitted, and a nut is screwed on, so that the two connected parts are connected as a whole.
3. One end of the welding stud is welded to the surface of the connected part, and the other end (threaded end) passes through the connected part with a through hole, and then put a washer and screw on the nut, so that the two connected parts are integrated into a whole .
Difference between studs and bolts
1. Studs do not have a head, but only a type of fastener with external threads at both ends. When connecting, one end of it must be screwed into a part with an internally threaded hole, the other end must be passed through the part with a through hole, and then the nut is screwed on so that the two parts are firmly connected into a whole. This type of connection is called a stud connection and is also a detachable connection. It is mainly used in situations where one of the connected parts has a large thickness, requires a compact structure, or is not suitable for bolting due to frequent disassembly.
2. The bolt is a bolt head with a bolt head at one end, usually a hexagon, an outer cylindrical inner hexagon, or a countersunk head with a flat or cross slot, and the other end has a threaded fastening on the whole section or part of the length. When tightening parts, only the threaded end needs to be equipped with a nut to achieve tightening.
3. The stud is also called a double-headed stud. The structure is provided with threads at both ends. When using it, you need to screw one end to a fixed part first, then put a fastener, and then tighten the nut at the other end. Fastening effect.