Riveting process of special-shaped bolts and nuts

Today I will introduce to youShaped bolts and nuts——The riveting process of blind rivet nuts. Blind rivet nuts, also known as rivet nuts, pull caps, and instant pull caps, are used for fastening various metal sheets, pipes and other manufacturing industries. It was developed to solve the shortcomings of thin metal plates and thin tube welding nuts, such as easy melting and easy tapping. It does not require tapping internal threads, no welding nuts, and the riveting efficiency is firm and easy to use.

1. Nominal diameter of rivet nut thread;

Before construction, first confirm the type and specification of the rivet nut according to the requirements of the drawing, ensure that the correct rivet nut is used, and prevent the use of lug specifications. The type of riveting nut should be based on the data in the riveting nut type specification table.

2. The thickness of the base plate and the size of the bottom hole determine the bottom hole size requirements of each model. If the riveting nut cannot be installed before the formal riveting, it must be confirmed whether the size of the bottom hole of the plate meets the requirement of 7 feet, and the riveting should be stopped.

3. Adjust the riveting machine

Check whether the air pressure is within the working air pressure range (0.5:0. 7 mpa). The tie rod and pneumatic riveting machine were assembled. Adjust the load length of the tie rod according to the length of the rivet nut. The tie rod should reach the last 2~3 threads of the rivet nut. At the same time, adjust the stroke of the rod to check whether the length of the rod is appropriate. If the stretched length is not satisfied, adjust the stroke until the stretched length is satisfied, and then perform batch operations.

4. Riveting

Put the riveting nut into the bottom of the well. It can only be easily inserted by hand, and cannot be forced into it with other tools. During installation, the rivet nut should protrude at least 0.1 mm from the workpiece. See Figure 2. Install after riveting. The rivet must be perpendicular to the surface of the workpiece, and the rivet head must be pressed against the workpiece. Test shrinkage after riveting (measure after installation, reinstall after finding installation problems).