Button head self tapping screws process

The production of button head self tapping screws has always required a standard process. Don’t look at the size of the screws, but the screwing process must not be underestimated. The screws are small, and the process can be produced quite a lot! Through the screw, the factory sees the screwing process.

How is the screw made? In fact, from the process, I believe you will have a clearer understanding. The button head self tapping screws production process mainly includes seven steps of annealing, pickling, drawing, forming, caulking, heat treatment, and surface treatment.

Annealing is mainly to heat the wire to a suitable temperature for a certain period of time, and then slowly cool to adjust the crystal, reduce the hardness, and improve the normal temperature processability of the wire.

Pickling is designed to remove the oxide film on the surface of the wire and form a phosphate film on the metal surface to reduce the scratching of the tool during the wire drawing and cold pier or forming process.

Draw the line to pull the unit to the required wire diameter.

Molding is the cold casting (or hot casting) of the wire to achieve the shape and length (or thickness) of the semi-finished product.

Tooth decay is the tanning or tapping of a formed semi-finished product to achieve the desired thread.

Heat treatment can be carried out according to different objects and purposes

Surface treatment, that is, an appearance processing program of the button head self tapping screws, is a process of forming a coating layer on the surface of the workpiece by a certain method, and the purpose thereof is to impart an effect of surface appearance and corrosion resistance of the product, and the surface treatment method is mainly performed. Electroplating, hot-dip galvanizing, and mechanical plating.

Did you feel the magic of the screwing process? If you want to purchase or customize screws, please contact the Shi Shi Tong screw factory.

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