What is the process of screw processing and production?

Screw fasteners are used in all aspects of our lives, from airplanes, high-speed rails, ships, to mobile phones, Watches, glasses, etc. have screw fasteners. Screw fasteners play an important role in our life and economic development. So how are screw fasteners produced?

1. The metal material for screw processing generally uses the wire that has been made into the spiral award in advance, because the wire is in the After forging, it will be deformed and thickened, so when we make screws, we need to choose a wire with a slightly thinner shaft portion of the screw according to our needs.

2. The wire diode screw wire that is fed to the proper length position is straightened by the machine and then fed again into the cold heading equipment.

3. First, the punch movement prepares the wire, then the punch moves, again forging the wire and making it The finished product is formed. In the cold heading process, the number of fixed dies (pressing dies) and stamping (flattening) dies (punches) is not the same. Some complex screws may require multiple punches to form together, which requires multi-station equipment to form the screws.

4. After the movement of the punch, the head of the screw has been completed, but the part of the screw shaft is not yet Thread, the forming method of screw thread teeth is thread rolling. Thread rolling is to use two relatively rotating thread rolling die (screwing wrench) engraved with thread teeth to extrude the cylindrical blank formed by multi-station or heading machine in the middle.

5. After heading and rubbing, the whole screw has been produced. Of course, in order to make the appearance of the screw Brighter, better performance, generally do surface treatment process. Such as cleaning and passivation of stainless steel screws, surface electroplating of carbon steel screws, etc. Made of screw fasteners in various colors.

Note: When producing screw fasteners, it should be noted that the molds required for each screw are different. The same, so non-standard screws will require additional mold production.