Specialized screw processing principle professionals are disregarded, so simple knowledge is showing off here. But for the majority of ordinary people, this is not necessarily known, unless you have visited the screw factory to learn. Screws and screw machines were first invented and manufactured by the British and have a history of more than 200 years. There are two processes for screw thread forming: one is cutting and the other is extrusion.

Cutting processing is generally lathe processing, which is to find an iron rod that is a round rod of the material you need. The diameter of the round bar is the maximum outer diameter of the special screw. For the processing of tooth-shaped turning tools, the front end of the turning tool must be ground to the size of the screw tooth shape. Otherwise, the assembly will be affected. Then the thread is cut through the lathe. The popular point is to hollow out the excess material of the round bar into a thread through the turning tool. This type of processing method is suitable for small batches and high-precision processing. However, the processing cost is high and the efficiency is low.

Extrusion processing is processed by professional screw equipment, which is called thread rolling machine in the screw factory industry. The diameter of the iron rod is the middle value between the maximum size at the top of the screw and the minimum size at the bottom of the screw. Utilizing the flow properties of metal materials through high-speed extrusion molding, extrusion processing can realize batch automated production with stable quality. Low cost, high efficiency, suitable for large-volume, large-scale production.