Solid core bolts are generally divided into copper, aluminum, iron and stainless steel plates according to material zoning, white zinc plating, color zinc plating, blue zinc plating, bright nickel plating, etc. according to the metal surface treatment method, solid core bolts can be divided into small flat head, round mouth, sink one, etc. according to the division of rivet head, the actual selection is based on the requirements of consumers. Solid bolt can be widely used in CNC blade, stationery account book, hardware lock, hat car hardware case leather goods, baby carriage, clutch steel plate, motorcycle accessories and electrical products, including all aspects of daily life.

Self piercing riveting technology is often used for the riveting technology of solid core bolt. The punching needle promotes the downward fitness movement of the solid core bolt. The knife edge under the bolt flushes away the riveting raw material and falls down from the cavity. After the bolt reaches the mold cavity, the body-building exercise is stopped. With the further sliding of the punch pin, the concave platform of the inner hole of the punch pin is opposite to the riveted raw material When the material is pressurized, it will produce plastic deformation and do axial flow inward, so that it can firmly wrap the waist drum bolt, and then produce a stable locking shape. This kind of riveting process is only used for plastic deformation of metal materials and the connection between metal materials. Another kind of bolt self punching technology is waterproof lantern rivet. The bolt appearance is not waist drum shape, but there is a circular concave groove on the bolt. When the punch falls down to the critical point, the riveted raw material of the next layer is extruded to form the axial fluidity, which fills the concave edge ring groove of the concave groove, while the upper inner hole of the bolt causes "upsetting", and the double-layer raw materials are riveted together. The technical advantage of self piercing riveting depends on the raw materials with different characteristics, coating and difficult to be connected by riveting. The riveting firmness is better than welding, and the riveting quality is stable To achieve solid and consistent riveting results, automobile rivets are customized and the whole process of riveting is cleaned up without smoke, which significantly saves energy compared with electric welding. The whole process of riveting is very easy to carry out automation technology, and the technology of self piercing riveting is also defective. When connecting thick steel plates, the compressive strength of self piercing riveting is smaller than that of welding. When riveting, there is a prominent "rivet" at the end Because the whole process of riveting must be under great working pressure and the riveting equipment is relatively heavy, when self piercing riveting is carried out, both sides of the raw materials at the riveting position must be touched (one side is a punching pin, the other side is a grinding tool), and riveting in public is not allowed.