Do you know how long bolts are made?

Some people may think that the production of long bolts is easy. However, this is not the case. The production of long bolts goes through many processes, and each step is crucial.

1. Wire drawing, through the external force to make the metal wire through the mold to reach the required cross-sectional area shape and size.

2. Cold heading: The head of long bolt is made by punching, bending, stretching and other processing methods of the mold on the material without heating.

3. Spinning, simply speaking, is a method of rolling the blank material into spiral grooves by using the relative motion of two washboards.

4. Heat treatment is a kind of metal thermal processing technology in which the metal materials are placed in a certain medium for heating, heat preservation and cooling, and their properties are controlled by changing the metal structure on the surface or inside of the material, so as to make it have the mechanical, physical and chemical properties required.

5. Electroplating, the process of attaching a metal film to the surface of metal or other material products by electrolysis, so as to prevent metal oxidation, improve wear resistance, electrical conductivity, reflective property, corrosion resistance, and improve the appearance.

6. Test, including hardness test, salt spray test, etc., to measure the performance and precision of long bolts.

7. Packaging, packaging according to customer requirements, to protect the product in the transportation process.

8. Finished products,long bolts qualified for sale after inspection shall be deemed as finished products.

Shi Shi Tong has 32 years of experience in screw custom artisans, skilled, production process level check, 22 years committed to the development and production of non-standard screws, long bolts, titanium screws, if you have related needs, please contact us, looking forward to working with you.

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