Cold heading: It is the use of metal plasticity, using cold mechanics for pressure or cold drawing, to achieve the purpose of metal solid deformation. The method of forging the top of a bar or wire at room temperature.
Cold headings are mainly used to make bolts, nuts, nails, rivets, and steel balls. Forging blank material can be copper, aluminum, carbon steel, alloy steel, stainless steel and titanium alloy, material utilization rate of up to 80 ~ 90%. The cold heading is carried out on a dedicated cold heading machine, which facilitates continuous, multi-station, and automated production.
In the cold heading machine, the processes of cutting, honing, accumulating, forming, chamfering, twisting, shrinking and trimming can be performed in sequence. High production efficiency, up to 300 pcs/min, and maximum cold-worked workpiece diameter of 48 mm. Cold Heading Bolt Process Diagram A typical procedure for cold heading bolts. Multi-station nut automatic cold heading machine Multi-station nut automatic cold heading machine. The bar stock is automatically fed into a certain length by a feeding mechanism, and the cutting mechanism cuts it into billets, which are sequentially sent to the accumulating press forming and punching stations for forming by a clamp transfer mechanism.
On the surface, cold-headed products look more beautiful than hot-headed products, and have a good finish. In terms of use, the heat-retaining nuts generally have higher hardness than cold-headed products, and the strength is higher. For users with high requirements, materials are very large. the difference.