Cold heading is a forging method that uses molds to upset metal rods (typically locally) at room temperature. It is commonly used to manufacture the heads of screws, bolts, rivets, and similar fasteners. This process can reduce or even eliminate the need for cutting machining.
The materials used for forging can include copper, aluminum, carbon steel, alloy steel, stainless steel, and titanium alloy, with a material utilization rate of 80-90%. Cold heading is usually performed on specialized cold heading machines, which facilitate continuous, multi-station, automated production. On a cold heading machine, operations such as cutting, heading, gathering, forming, chamfering, threading, reducing, and trimming can be sequentially completed. The production efficiency is high, reaching over 300 pieces per minute, with the maximum diameter of cold-headed workpieces being 48 millimeters. The rod material is automatically fed to a specific length by a feeding mechanism, cut into blanks by a cutting mechanism, and then sequentially transferred to the gathering, forming, and punching stations by a gripper transfer mechanism for cold heading.
This technology is a type of cold forming, which involves processing materials through punching, bending, and drawing without heating. Cold forming processes include cold heading, cold rolling, and die forging.
Cold forging, or cold heading, is chosen for several reasons due to its numerous advantages over other metal forming processes. Here are some key benefits:
Material Utilization:
Mechanical Properties:
Dimensional Accuracy:
Surface Finish:
Production Efficiency:
Energy Efficiency:
Strength and Durability:
Cost-Effectiveness:
Environmental Benefits:
Given these advantages, cold forging is an attractive option for producing high-quality, high-strength components efficiently and economically.