Analysis: the difference between cold heading nuts and hot heading nuts

Cold heading: It is to manipulate the plasticity of metal, adopting cold state mechanics to apply pressure or cold drawing, to achieve the purpose of solid metal deformation.

The casting method of thickening the top of a bar or wire at room temperature. Cold heading is mainly used to make complete machines such as bolts, nuts, nails, rivets and steel balls. The forging blank materials can be copper, aluminum, carbon steel, alloy steel, stainless steel and titanium alloy, etc., and the material manipulation rate can reach 80-90%. Cold heading is mostly carried out in the public cold heading captain, which is convenient to complete continuous, multi-station, and automated production. On the cold heading machine, the processes of cutting, heading, stacking, forming, chamfering, thread rolling, diameter reduction and trimming can be realized in sequence. The production compliance is high, up to 300 pieces/min or more, and the diameter of the largest cold-headed workpiece is 48 mm. The cold heading bolt process shows a typical process of cold heading bolts. The multi-station nut active cold heading machine is a multi-station nut active cold heading machine. The bar material is actively fed to a certain length by the feeding mechanism, and the blocking mechanism blocks it into blanks, and then is sent to the stacking pressing and punching stations one by one by the clamp transfer mechanism for forming.

In the catering industry, Lengdun refers to the construction of cold vegetarian food, that is, making cold sauces and smoked sauces, also known as white cases. Redun is the construction of frying and frying, also known as red case.

In terms of general situation, cold heading products look more beautiful than hot heading products, and have better brightness. In terms of use, hot heading nuts are generally harder than cold heading products, and their strength is higher. It is suitable for users with high requirements. There is a big difference.