Screws appear in all aspects of our lives. From airplanes, high-speed trains to mobile phones, watches, etc., there are screws. Screws play a major role in our lives and economic development. So how are screws produced? Haimok Precision Machinery (Kunshan) Co., Ltd. is here to tell everyone.

The metal material for manufacturing screws generally uses wires that have been made into propellers in advance. The European standard screw punch screws are transported to the appropriate length of the wire diode screw wire to be straightened by machinery and equipment, and then transported to the cold forging machine equipment. Cold heading punch

First, the punch moves to prepare the wire for forming, and then the second punch moves to forge the wire again and make the finished product into shape. The number of fixed dies and stamping dies in the cold heading process are different. There are many European standard screw punches. Complex screws may require multiple punches to form together, which requires multi-station equipment to form the screw. The head of the screw that passes through the movement of the punch has been completed.

But the part of the screw shaft is not threaded. The forming method of the screw thread is cold heading punch thread rolling. The thread rolling uses two relatively rotating thread rolling dies with engraved thread teeth. The extrusion process passes through multiple stations or A cylindrical blank formed by a heading machine.

After heading and threading, the entire screw has been produced. Of course, in order to make the appearance of the screw brighter and better, the rotary cutting tool holder usually has a surface treatment process, such as cleaning and passivation of stainless steel screws, electroplating on the surface of carbon steel screws, etc. .