Processing technology, mechanism and working principle of automatic cold heading machine

The full-automatic cold heading machine is a special equipment mainly used for the mass production of fasteners such as nuts and bolts. The earliest cold heading machine in the world originated from Germany. At that time, the purpose of developing the cold heading machine was mainly to produce a large number of bullet shells during World War II. Heading machines, also known as bucklers, wrapping machines, and binding machines, were first introduced from Taiwan. It is now widely produced domestically. Heading machine belongs to cold heading equipment. It is generally used to manufacture bolts, nuts, nails, rivets, steel balls and other parts, which is called screw heading cold heading machine.

Cold heading process of automatic cold heading machine: according to the metal plastic deformation theory, a certain pressure is exerted on the metal blank at room temperature to make it plastic deformation in the mold cavity. The metal material with good quality "plastic deformation" must be selected according to the specified shape and size. For example, rivet bolt steel, its chemical composition and mechanical performance have strict standards. There are many models and series of cold heading bolt and nut forming machines, and the equipment performance is reliable High efficiency, stable product quality, large product forming and upsetting force, powerful configuration and large equipment investment at one time. Therefore, the production specification below M24 is the most economical.

It has good surface quality and high dimensional accuracy. Due to the cold work hardening in the upsetting process, the deformation should not be too large to reduce cracking. The cold upsetting process is applicable to products with large batches and various specifications, so as to reduce costs. The automatic cold upsetting machine uses the plasticity of metal to apply pressure or cold drawing using cold mechanics to achieve the purpose of solid metal deformation. Forging forming method to thicken the top of bar or wire at room temperature. Cold heading is mainly used to manufacture bolts, nuts, nails, rivets, steel balls and other parts. Forging billet materials can be copper, aluminum, carbon steel, alloy steel, stainless steel and titanium alloy, etc. The utilization rate of materials can reach 80~90%. Cold upsetting is mostly carried out on special cold upsetting machines, which is convenient for continuous, multi station and automatic production.