Production and storage methods of hex head bolt

Whether it is furniture assembly or electrical assembly, it is inseparable from the assistance of hex head bolts, so that they can be tightly bonded together and will not appear loose, so it brings great convenience to our daily life. So what is the production process and storage method of hex head bolts? Let's take a look.

Here is the content list:

l The production process of hex head bolt

l Storage method of hex head bolts

The production process of hex head bolt

Annealing process: The product is put into the furnace, then closed with the lid, and then the temperature is slowly increased to the specified temperature, this step takes 3-4 hours. Then the temperature is slowly raised to 550 degrees, which takes 3-4 hours, and finally, the hex head bolt is allowed to cool naturally to room temperature. This process can adjust the crystalline organization, reduce the hardness and improve the processability of the wire at room temperature.

Acid washing process: The purpose of acid washing is to remove the oxidation film of the wire. First, the whole hexagonal disc is invaded into three hydrochloric acid tanks at room temperature and concentration of 20-35 for a few minutes respectively. The hydrochloric acid corrosion is then removed from the wire surface with water. To produce a tighter film in the next process, oxalic acid is used to increase the activity of the metal. After the hexagonal disc is invaded with phosphate, the treatment solution is allowed to dissolve with the steel to form a compound that will attach to the surface of the screw to form a skin. The residue on the surface is then removed with water and the lubricant is used to increase the lubricity of the hex head bolt.

Forming process: There are two kinds of forming for hex head bolts: four dies and four punches or three dies and three punches. The first step is to put the product into the heating equipment and set the heating time and temperature according to the product specification. In the second step, after heating, the product is moved to the molding machine and molded. Finally, the product is shrunk by extruding it with a rod-binding machine.

Lapping process: The formed semi-finished product is lapped or tapped to achieve the required thread.

Heat treatment process: To improve the mechanical properties of the hex head bolt, eliminate residual stress and improve the machinability of the metal, the product needs to be heat treated. Depending on the needs of the product, both preparatory heat treatment and final treatment can be used.

Surface treatment process: The surface of the hex head bolt is covered by electroplating, thermal galvanizing, and mechanical galvanizing to make the product surface beautiful and anti-corrosive.

Storage method of hex head bolts

1. Before putting the hex head bolt into the warehouse, mark the factory time of this batch of goods, and try not to mix multiple batches.

2. The warehouse should be dry, and do a good job of indoor moisture-proof measures to prevent the hex head bolt from rusting.

3. Do not stack too high in the warehouse. Because the high-strength hexagonal bolts will be heavy, if the pile is too high, it is not conducive to handling, and fear that it will fall and hit people.

4. Store the hex head bolt in strict accordance with the warehouse requirements, to protect the product for a longer time.

The above is the relevant content about the production and storage methods of hex head bolts. If you are interested in a hex head bolt, you can contact us, our website is www. suqingfasteners.com. I look forward to your arrival very much and hope to cooperate with you.