In the stainless steel screw and stainless steel nut forming process, cold heading (squeeze) technology is a processing technology. Cold rolling (extrusion) belongs to the category of metal pressure processing. It is suitable for mass production of stainless steel screws, stainless steel nuts, stainless steel gaskets, high-strength bolts, and high-strength nuts. This technology, in the production process, at room temperature, the external force applied to the metal, so that the metal in the design of a good mold, this method is called cold heading. Actually, in the production process of stainless steel screws, stainless steel nuts, stainless steel gaskets, high-strength bolts, and high-strength nuts, not only can only one kind of process be used to achieve production, but in addition to the upsetting deformation of metal during cold heading, Also accompanied by positive, negative, reverse extrusion, composite extrusion, stamping, rolling and other processes. Therefore, in the production process of stainless steel screws, stainless steel nuts, stainless steel flat pads, high-strength bolts, and high-strength nuts, there is a popular term for cold heading technology. To be precise, it should be called cold heading (squeezing). Cold squeezing has many advantages. The main advantages are summarized in the following aspects:
1. The utilization of steel is high. Such as processing stainless steel screws, stainless steel nuts, stainless steel flat pads, high-strength bolts, high-strength nuts. With the cutting method, the utilization rate of steel is only 25%-35%, while the utilization rate of steel can be as high as 85%-95% with the cold heading method. It is only the material head, tail, and some processes for cutting the head of the hexagon. Consumption.
2. High productivity. Cold-pressed stainless steel screw, stainless steel nut, stainless steel flat pad, high-strength bolts, high-strength nut molding efficiency than the average cutting process to be several times higher.
3. Good mechanical properties. Since the stainless steel screw nut is processed during the cold heading process, the metal fiber is not cut off, so the quality of the stainless steel screw and the stainless steel nut high strength bolt are much better.
4. Suitable for automated production. Stainless steel screws, stainless steel nuts, stainless steel flat washers, high-strength bolts, and high-strength nuts are basically symmetrical parts. They are suitable for high-speed automatic cold heading machines and are the main method for mass production.
Cold heading extrusion technology is a kind of advanced processing method that is widely used domestically and abroad. It is very promising. Cold heading is used to process stainless steel screws, stainless steel nuts, stainless steel flat washers, high-strength bolts, and high-strength nuts. High processing methods are commonly used in the fastener industry. Make full use of, improve the metal characteristics, grasp the mechanism of the deformation of metal properties, developed a scientific and reasonable fastener cold extrusion process. It is the core technology of fastener companies.