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Shenzhen combination screw manufacturers how to classify products
Combination of ordinary screw is what we call the combination of riveting screws, mainly for the common parts of the car assembly screw operation. Generally speaking, the type of combination screw structure in accordance with the combination of screw temperature, the scope of application and combination of screw tolerance can be divided into three categories.
First, according to the combination of screw temperature classification
1, according to the combination of rivets when the screw heating temperature is divided into cold riveting, hot riveting and mixed riveting. Cold riveting is the combination of rivets at room temperature under the screw, cold riveting equipment, large impact, request rivets with excellent plasticity, small deformation resistance.
2, hot riveting is heated to a certain temperature rivets will stop after a combination of screws, rivets heat so that the strength and plasticity increased, so that deformation resistance greatly reduced and simple combination of screw forming.
3, the combination of external force required for screws and cold riveting was significantly reduced, so the larger diameter rivets and large quantities of combination screw, the general selection of hot riveting.
4, mixed riveting riveting head is the first local heating, mainly for larger diameter rivets combination screw.
5, the local heating rivet head, the rivets can be combined in the processing of the screw process. Rivet does not change the shape of the rod, and insist on technical stability.
Second, according to the use of combination screw classification
1, according to the nature and scope of operation of the components, the combination of screws can be divided into a solid combination of screws, screws and close combination of tight combination of three screws.
2, a solid combination of screws and rivets and components can withstand a great effect, but the tightness of the joints without special requirements.
3, tight combination of screws both requests rivets and components can withstand greater force, but also request the seam with excellent tightness, so that under certain pressure effects, the liquid or gas will not cause leakage.
4, close combination of screws do not require rivets and components to withstand greater force, but pleasing seam with excellent tightness to prevent leakage, leakage or leakage.
5, tight combination of screws and tight combination of screws and solid combination of screws is not the same as in the sandwich inside and outside along the riveting seam with sealing materials, and the use of riveting their own expansion blocking the riveting and nail holes along the leakage path, and then reach the structure Of the seal.
Third, according to the combination of screw force classification
1, according to the combination of the screw when the force of the rivets, the combination of screws can be divided into the impact of combination screws, pressure combination screws and special combination screws.
2, the impact of the combination of screws is the combination of screws in the process, the use of rivets front Wotou impact energy to hammer the end of the rivets, short-term acceleration obtained by the Wotou, the rapid formation of a larger impact, and then make Rivet rod upsetting, forming head and combination of screws.
3, the power source for handmade rivets hammer and pneumatic air hammer.