The application of high strength steel plate in automobile tends to increase, which solves the difference between net weight and compressive strength of ordinary car plate. High strength steel plate is usually formed by stamping die, which is often used as the key parts of car body. Welding is often used for various forming and connection before body in white. However, the composition of carbon and aluminum alloy elements will harm the forgeability of thick steel plate. Before welding, the main welding parameters and processing technology shall be adjusted. Generally, galvanized sheet is widely used, and the compressive strength of thick steel plate is not as good as that of high-strength steel plate. The relativity of punching machine, sheet metal bending and forming is very easy. Zinc resistor is very big, which is harmful to the welding characteristics of thick steel plate. When selecting high strength steel plate or bolt connection plate, select high strength steel plate. The basic concept and processing characteristics of cold rolling riveting method: all aluminum lantern core pulling rivets have made it clear that the cold rolling riveting method is a riveting method which uses riveting rod to charge the bolt part and continuously shake around the management center until the bolt is formed. According to the cold rolling track of this kind of riveting method, it can be divided into swing rolling riveting method and axial riveting method. Swing rolling riveting method is easy to understand, and the rivet head only moves along the direction of the circle. However, the axial riveting method is complicated. Its riveting head track is red plum blossom shaped. Every time the rivet head is positioned according to the bolt positioning point, that is, the rivet head not only has fitness movement in the round direction, but also shakes and rolls along the axial direction. Compared with the two riveting methods, the quality of the parts riveted by the axial riveting surface is good, the high efficiency is slightly higher, and the riveting is more stable, and the riveting parts do not need to be clamped. Even if the bolt management center is slightly deviated from the main shaft bearing management center, the riveting work can be successfully completed. And the swing mill riveting machine must be the product workpiece accurate positioning, good is to clamp riveted parts. However, due to its complicated structure, high engineering cost and inconvenient maintenance, the axial riveting machine is generally not used in non unique places. On the other hand, the rotary riveting machine has the advantages of simple structure, low cost, convenient maintenance and good credibility. It can consider the riveting requirements of more than 90% parts, so it is favored by many people. In addition, using the basic principle of swing roller riveting, we can also produce double head riveting machine suitable for more riveting, which has its unique advantages in contemporary industrial production.
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