Industry Dynamics

Basic knowledge
Riveting technology is actually a special connection technology, through the rivets or rivetless connection technology to connect the parts together, now the riveting process has been very advanced, in addition to the traditional meaning of riveting, deformation, extension, molding technology also incorporates the riveting technology, such as a small car 60% of the parts need to be used to the riveting technology, from a simple scissors to the complexity of the aircraft, the riveting technology have a From simple scissors to complex airplanes, riveting technology has its place. Riveting technology is closely related to modern industry and the structure of riveted parts affects appearance, function and texture.

1. Definition of riveting
The use of rivets to join two or more pieces of work is called riveting. There are 3 basic types of riveted joints.
1) Strong riveted joints: Riveted joints with strength as the basic requirement, which are required to be able to withstand strong pressure, without any special requirements on the tightness of the joint. Such as: frame, bridges, vehicles, cranes, etc. belong to this category of riveting.
2) strong dense riveting: both the strength and tightness of the riveting requirements, this riveting requirements can withstand strong pressure, but also requires a fairly tight joints. Such as: boilers, compressed air tanks and other high-pressure vessels.
3) Tight rivets: only to the basic requirements of tightness rivets, this riveting can not withstand strong pressure, can only withstand uniform and small pressure, but its seams, to keep tight, has prevented leakage. Such as: water tanks, gas tanks, oil tanks structure belongs to the tight riveting.

From the connection can be divided into
Activity riveted: the combined parts can be rotated, not a rigid connection.
Such as: scissors, pliers.
Fixed riveted: the combined parts can not move each other, which is a rigid connection.
Such as: frame, three rings on the nameplate lock, bridge construction.
Dense seam riveted: riveted seam tight, no leakage of gas, liquid, which is a rigid connection.

2. there are three basic forms of riveted joints: butt joints, lap joints, corner joints. 3.

3. riveting can be divided into two ways: cold riveting and hot riveting.
Riveting with rivets at room temperature is called cold riveting.
The riveting of rivets at room temperature is called cold riveting. The riveting of rivets that are pre-heated is called hot riveting.

4. There are several types of rivets in common use: semi-circular head, countersunk head, semi-countersunk head, flat head, flat cone head, flat round, flat. 5.

5. Rivet length determined by the formula: L1.128 (total thickness of the sheet) + 1.4d (diameter), the total thickness of the sheet shall not exceed four times the diameter of the rivet. 6.

6. rivet length and riveting quality relations: rivets too long, rivets pier head is too large, the nail bar is easy to bend: rivets too short, the pier thickness is not enough, the nail head molding is incomplete, affecting the riveting strength and tightness.

7. Advantages of riveting
1) Low cost of riveting. In the case of the same quality, the cost of riveted joints is much lower than welding, as long as it can meet the performance of the use, the producers are usually using low-cost methods;
 2) Convenient production, easy to automate production. Riveting as long as the rivets are finished; and welding in this regard, the automation of the quality is not good control, after welding may appear deformation and other problems, and some follow-up processes, which also leads to high costs.

Believe that see this, you should have a new view of riveting it.