Cold heading refers to the stamping of raw materials at room temperature, and hot heading refers to the stamping of raw materials after heating. There are no special requirements for specific uses. Generally, cold heading is required, because of such surface finish and material structure. The composition will be closer, and larger workpieces are often processed by hot heading. Cold heading: It is to use the plasticity of the metal to apply pressure or cold drawing by cold mechanics to achieve the purpose of solid deformation of the metal. A forging method in which the top of a rod or wire is thickened at room temperature. Cold heading is mainly used to manufacture bolts, nuts, nails, rivets and steel balls and other parts. The forging blank material can be copper, aluminum, carbon steel, alloy steel, stainless steel and titanium alloy, etc., and the material utilization rate can reach 80-90%. Cold heading is mostly carried out on a special cold heading machine, which is convenient for continuous, multi-station and automatic production. The processes of material cutting, heading, accumulation, forming, chamfering, thread rolling, diameter reduction and edge trimming can be completed in sequence on the cold heading machine. The production efficiency is high, up to 300 pieces/min, and the diameter of the largest cold heading workpiece is 48 mm. The schematic diagram of cold heading bolt process is a typical process of cold heading bolt. Multi-station nut automatic cold heading machine is a multi-station nut automatic cold heading machine. The bar is automatically fed to a certain length by the feeding mechanism, and the cutting mechanism cuts it into blanks, and then sent to the accumulating and pressing station and punching station for forming by the clamp conveying mechanism.
Cold heading refers to the stamping of raw materials at room temperature, and hot heading refers to the stamping of raw materials after heating. There are no special requirements for specific uses. Generally, cold heading is required, because of such surface finish and material structure. The composition will be closer, and larger workpieces are often processed by hot heading. Cold heading: It is to use the plasticity of the metal to apply pressure or cold drawing by cold mechanics to achieve the purpose of solid deformation of the metal. A forging method in which the top of a rod or wire is thickened at room temperature. Cold heading is mainly used to manufacture bolts, nuts, nails, rivets and steel balls and other parts. The forging blank material can be copper, aluminum, carbon steel, alloy steel, stainless steel and titanium alloy, etc., and the material utilization rate can reach 80-90%. Cold heading is mostly carried out on a special cold heading machine, which is convenient for continuous, multi-station and automatic production. The processes of material cutting, heading, accumulation, forming, chamfering, thread rolling, diameter reduction and edge trimming can be completed in sequence on the cold heading machine. The production efficiency is high, up to 300 pieces/min, and the diameter of the largest cold heading workpiece is 48 mm. The schematic diagram of cold heading bolt process is a typical process of cold heading bolt. Multi-station nut automatic cold heading machine is a multi-station nut automatic cold heading machine. The bar is automatically fed to a certain length by the feeding mechanism, and the cutting mechanism cuts it into blanks, and then sent to the accumulating and pressing station and punching station for forming by the clamp conveying mechanism.
Forged head, also called hot pier, heats the head to red and extrudes it;
Is the hexagonal head of the bolt pierced?
Most of them are pier, because it can save material. According to the tonnage of pier forging machine and bolt diameter, cold pier or hot pier process can be adopted.
The hexagon heads of special or special bolts in small batches are milled after turning.
