The cold heading process is a forging method of thickening the top of bar or wire at room temperature with a cold heading machine. On the cold heading machine, cutting, upsetting, stacking, forming, chamfering, wire rolling, reducing and trimming can be completed in turn. The bar is automatically fed to a certain length by the feeding mechanism, cut into blanks by the cutting mechanism, and then sent to the stacking and stamping stations in turn for forming. Mainly used for manufacturing bolts, nuts, nails, rivets, steel balls and other parts. The forging blank material can be copper, aluminum, carbon steel, alloy steel, stainless steel and titanium alloy. The following briefly introduces the advantages of multi-station cold heading machine equipment:

First, the structural characteristics of multi-station cold heading machine

(1) The crankshaft, the engine block and the impact connecting rod are all connected by high wear-resistant alloy copper tiles, with large bearing capacity and long service life.

(2) The machine body is made of nodular cast iron and alloy, which has high tensile strength and good wear resistance.

(3) Two-stage gear transmission system is adopted, which has high transmission efficiency and large transmission torque.

(4) Equipped with pneumatic clutch brake to reduce motor power consumption.

(5) The cutting system uses the guide plate to drive the cutter bar, and the guide plate moves back and forth, and the cutting force is transmitted in a straight line, so the force is large, stable and well balanced.

(6) Multi-station cold heading machine adopts opening and closing fixture to convey the workpiece, and the clamping system can be turned over or translated, which is beneficial to the arrangement of forming process.

(7) Equipped with frequency conversion speed regulating device, it can regulate speed stepless within a certain range.

(8) Equipped with fault detector and safety protection device, it will automatically stop when the equipment fails, so as to protect the equipment and tools to the maximum extent.

(9) The feed box is equipped with a thrust device to improve the feed accuracy.

(10) The oil circuit design of the lubrication system is simple and efficient, which can effectively protect the punch and workpiece on the basis of ensuring circulating filtration.

Second, the technological characteristics of multi-station cold heading machine

(1) Apply a certain pressure to the metal blank at room temperature, so that it will be plastically deformed in the mold cavity and shaped according to the specified shape and size.

(2) Good surface quality and high dimensional accuracy.

(3) The cold heading process is suitable for fasteners with large quantity and specifications.

Third, the selection of raw materials for multi-station cold heading machine

(1) cold heading machine is mainly manufactured according to the theory of metal plastic deformation, and its material is also very high quality when selecting metal materials, with very strict standards, especially for the chemical composition and mechanical properties of riveted steel.

(2) The cold upsetting machine has good surface quality and high dimensional accuracy in production, and good cold working hardening in upsetting process, so it can maintain good deformation without excessive deformation, thus reducing the phenomenon of workpiece cracking.

Selection of special cold heading oil for multi-station cold heading machine

(1) has excellent extreme pressure lubrication performance, high temperature resistance, extreme pressure wear resistance, rust resistance and high temperature oxidation stability. Improve the accuracy and smoothness of the workpiece, prevent the mold from sintering, meet the multi-station forming of standard parts and non-standard parts, and be fully qualified for cold heading stainless steel workpieces.

(2) It can minimize oil smoke and "floating fog" and meet the strict requirements of nuts with strong contractility.

(3) It has good performance for workpieces with large deformation, such as hollow, high-strength bolts, sleeves, stainless steel hollow and semi-hollow rivets.

(4) It can effectively protect the punch and die and prolong the service life.

(5) The heat dissipation effect is good, and the local temperature of the workpiece and the mold is prevented from being too high in the cold forming process.

(6) It is resistant to high temperature and is not easy to produce sludge. Low odor and smoke, protecting the operating environment.

(7) It has certain rust resistance and can meet the requirements of rust prevention between processes.

(8) It can meet the demanding cold heading stainless steel forming and large deformation carbon steel forming.