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The Similarities and Differences Between the Fastener of Cold-forging and Hot-forging Technology

Cold heading is the use of metal mold, by using cold mechanical pressure or drawing, reaches the metal solid deformation of. On the surface, cold products look heat product beautiful finish forging. In use, hot upsetting nut general hardness is higher than that of cold forging products, the strength is high, for high requirements of the users, the material is very different.


Cold heading refers to the room temperature forging forming method at the top of the bar or wire the bold. Cold heading is used in the manufacture of bolts, nuts, nails, rivets and steel parts. Forged blank material can be copper, aluminum, carbon steel, alloy steel, stainless steel and titanium alloy, the material utilization rate of up to 80~90%. Cold heading are used in special cold heading machine, to achieve continuous, multi station, automatic production. In order to complete cutting, upsetting, accumulation, forming, chamfering, rubbing, necking and cutting processes in cold heading machine. The production efficiency is high, more than 300 pieces per minute, the maximum workpiece diameter is 48 mm cold heading.


Multi station nut automatic cold heading machine is a multi station nut automatic cold heading machine. The bar is composed of a feeding mechanism of automatic feeding length, cutting mechanism for cutting the blank, and then transmitted by the clamp body in turn sent to accumulate pressing and punching station forming.