The combined bolt refers to a three-component assembly that is fastened together by an outer hexagonal bolt, a spring washer and a flat washer. Combination bolts are also called outer hexagon combination screws, also known as hexagon combination bolts.
Production Process：
The production process of combined bolts is to punch out the outer hexagonal bolt pier first, and then put the elastic flat pad on the manual or automatic pad threading machine. Then I rub my teeth. If the quantity is large, an automatic pad threading machine is used. If the quantity is too small, workers generally wear the elastic flat pad. Of course, the spring flat washers used in the combination bolts are generally professionally used to make combination screws. Other commonly used spring washers and flat washers are not acceptable for combination screws. So many of them are custom-made elastic flat pads. The choice of spring pad, the material is very important.Bad spring pads are combined on the combination screw, which is easy to break, or it is pressed down and cannot bounce.
Precautions：
The cross outer hexagonal bolts are produced, and then the three assemblies are combined with elastic flat pads. Generally, this combination bolt is produced, because the spring washer is not handled properly, it is easy to break. Therefore, our company generally hardens first, and then removes hydrogen after hardening, and electroplating after hydrogen removal. : 1. Matters needing attention in the quality of high-strength composite bolts. The surface of the combination bolt should be checked for burrs or scratches. There is no oil stain, or rust. It is necessary to check the material of the combination screw, which is used in different high strengths, and the grade strength should be consistent with it. 2. In terms of the use of combined bolts and nuts, they should be of the same grade as the nuts and used together. 3. When installing and using combination bolts, it should be done under reasonable weather conditions and not in the rain. 4. When installing, it is forbidden to use excessive force or excessive force. Lead to sliding teeth, or locking phenomenon.
