The processing principle of special screws is disregarding professionals, and such simple knowledge shows off here. But this is not necessarily known to the average person unless you visit the screw factory. Screw and screw machines were first invented and manufactured by the British people for more than 200 years. There are two kinds of screw thread molding process is cutting: Second, extrusion processing.
Special screws
Machining is generally lathe machining. It is to find the iron bar that is the round bar of the material you need. The diameter of the round bar is the maximum outer diameter of the special screw. Tooth-type turning tool processing, the front of the tool to grind the size of the screw-shaped teeth This step is the key or else the assembly will have an effect. Then through the turning machine cutting thread, speaking of the popular point is to use the turning tool to blank out the excess material into a thread, this processing method is suitable for small batches, high-precision processing requirements. However, the processing cost is high and the efficiency is low.
Extrusion processing is processed by professional screw equipment, and the screw factory is known as the squeezing machine. The diameter of the iron rod is the middle value of the maximum dimension of the screw top and the minimum dimension of the bottom end of the screw. Using the flow properties of metal materials through high-speed extrusion molding die, extrusion processing can achieve batch production, and quality and stability. Low cost, high efficiency for large-scale, large-scale production.