The similarities and differences between cold heading and hot heading nuts of fasteners

Cold heading is to use the plasticity of metal to apply pressure or cold drawing with cold mechanics to achieve the purpose of solid metal deformation. As far as the surface is concerned, cold heading products look more beautiful than hot heading products, and the finish is better. In terms of use, hot heading nuts are generally harder than cold heading products, and the strength is higher. For users with high requirements, the material has a lot. the difference.

A forging method of thickening the top of a bar or wire at room temperature. Cold heading is mainly used to manufacture parts such as bolts, nuts, nails, rivets and steel balls. The forging material can be copper, aluminum, carbon steel, alloy steel, stainless steel and titanium alloy, etc. The material utilization rate can reach 80~90%. Cold heading is mostly carried out on a dedicated cold heading machine, which is convenient to realize continuous, multi-station and automated production. Cutting, heading, accumulation, forming, chamfering, thread rolling, diameter reduction and trimming can be completed in sequence on the cold heading machine. The production efficiency is high, up to more than 300 pieces/min, and the diameter of the largest cold-headed workpiece is 48 mm. (Guide: Enjoy several ways to prevent loosening of nut threads)

The schematic diagram of the cold heading bolt process is a typical process of cold heading bolts. The multi-station nut automatic cold heading machine is a multi-station nut automatic cold heading machine. The bar material is automatically fed to a certain length by the feeding mechanism, and the cutting mechanism cuts it into blanks, and then is sent to the accumulation pressure forming and punching stations in sequence by the clamp transfer mechanism for forming.

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