? introduce
Core-pulling rivets (blind? Rivets)? -Rivets (rivets? Body)? Core (rivet? Terrier? Or? Rivets? Mandrel? )。 It is a kind of rivet used for single-sided riveting, but it must be riveted with a special tool-riveting gun (manual, electric and pneumatic). When riveting, use a special riveting gun to pull the rivet core to make the rivet expand and play a riveting role. This kind of rivet is especially suitable for riveting occasions where it is inconvenient to use ordinary rivets (riveting from both sides), so it is widely used in buildings, automobiles, ships, airplanes, machines, electrical appliances, furniture and other products. Among them, open flat round head core-pulling rivets are the most widely used, countersunk head core-pulling rivets are suitable for riveting occasions requiring smoothness, and closed core-pulling rivets are suitable for riveting occasions requiring higher load and certain sealing performance.
Check the finished products of core-pulling rivets: rivet diameter, rivet stem length, rivet cap thickness and cap diameter, total core length, exposed core size, rivet cap size and assembly outer diameter can all be considered. In actual inspection, we can measure the weak links of products, such as tensile strength, shear strength, nail core anti-falling, etc.
The key is to pay attention to the rivet, the rivet foot is insufficient, whether it is riveted in place; Or because the core cap is too big, the rivet mouth can't be pulled down; There is also jumping, that is, the tension of the nail core is too low or the fracture size is too thin.
The working principle of core-pulling rivet is realized by pulling the core head with a force from the inside out. In order to better apply core-pulling rivets, we must first understand the working principle of core-pulling rivets in detail.
? type
1. Ordinary open-ended core-pulling rivets
Open? Countersunk (flat head) core-pulling rivet
2.？ Closed core-pulling rivet? (Also known as waterproof rivets)
Closed countersunk core-pulling rivet
What are the main materials? Aluminum, iron, stainless steel, copper.
3. Structural rivets
The biggest difference between structural rivets and ordinary rivets is high strength, and the most typical feature is that the core is locked in the rivet body after riveting. Many people may think that the core of ordinary rivets remains in the rivet body after riveting, but it is actually loose. Structural rivets pay attention to a core retention (? Mandrel? retetion？ Load? )
C. structural rivets (structure? Rivets include many kinds, such as monobolt, hemlok and so on. Single-drum rivet (Avinox? ,? Avibulb)？ , internal lock drawing rivet (? interlok？ Megner Locke? ), steel double-drum rivets and stainless steel double-drum rivets (Stavex), double-lock rivets (Hucklok)? , BMW rivets (BOM). Wait? These structural rivets are mainly used in automobiles, railways and aviation.
There are products that the market needs, such as? Open rivet? Keywords single and double drum rivet, hippocampus nail, light music rivet,
Core-pulling rivet is also an important tool for riveting, which generally needs double-sided operation. The appearance of core-pulling rivets makes single-sided operation easier. Riveting is to use a metal cylinder or metal tube (rivet) with a diameter slightly smaller than the perforation to pass through the workpiece to be riveted, and tap or press the two end faces of the rivet, so that the metal column (tube) is deformed and thickened, and rivet heads (caps) are formed at both ends, so that the workpiece cannot be separated from the rivet. When an external force is applied to separate the workpiece, the nail rod and the nail cap bear the generated shear force to prevent the workpiece from separating.
As one of the architectural foundations, the principle of core-pulling rivets, the above is the relevant information of rabbit finishing. Rabbit suggested that before using the core-pulling rivet, we should pay attention to all parts of the core-pulling rivet, otherwise the building foundation will not be laid well, and the subsequent building will be meaningless, so everyone should check it every time, hoping that this information of rabbit can solve everyone's problems.