Basic information of cold heading machine

Cold heading machine is a special equipment mainly used for mass production of nuts and bolts.

The earliest cold heading machine in the world originated in Germany. At that time, the cold heading machine was mainly developed for mass production of bullet casings during World War II.

Cold upsetting process

(1) According to the theory of metal plastic deformation, a certain pressure is applied to the metal blank at room temperature to make it plastically deform in the mold cavity, so that the metal blank can be shaped according to the specified shape and size.

(2) High-quality metal materials with good plastic deformation, such as riveted rebar, must be selected, and their chemical composition and mechanical properties have strict standards.

(3) There are many models and series of cold heading bolt and nut forming machines. The equipment has reliable performance, high efficiency and stable product quality.

(4) The product has large upsetting force, large configuration power and large investment in disposable equipment. Therefore, the production specifications below M24 are the most economical.

(5) Good surface quality and high dimensional accuracy. Because there is cold working hardening during upsetting, the deformation should not be too large. Reduce cracking.

(6) The cold heading process is suitable for products with large quantities and specifications, thus reducing the cost.

Modern cold heading machine has been increased from simple two-station to multi-station in the past. At present, there are five-die, six-die and six-die extended cold upsetting machines in China. Z 12 series double-click full-die automatic cold upsetting machine.

This machine adopts coil material and straight rod material, and uses the principle of secondary upsetting to produce various headless bolts and mechanical parts such as head, countersunk head, semi-countersunk head and hexagon socket. The equipment is simple in operation and process, and can be used as a protective device and a pull-out mechanism for pushing out the slender punch.

Z 18-5 two-die four-punch cold upsetting machine is mainly used to produce fasteners such as screws and rivets.

Z4 1-24 Multi-station Automatic Nut Cold Upsetting Machine

This machine is a special cold upsetting equipment for producing hexagonal nut blanks. The material on the bar is fed by the roller, and then five processes, such as cutting, ball pressing, corner pressing, punching and forming, are carried out in turn. One machine can be completed automatically, which is suitable for manufacturers who mass produce standard nuts or professional large and medium-sized enterprises who use standard nuts in large quantities. Note: Our company can produce six-station and seven-station non-standard automatic cold upsetting machines according to user's requirements.

Z4 1-30 Multi-station Automatic Nut Cold Upsetting Machine

This machine is a special cold upsetting equipment for producing hexagonal nut blanks. The material on the bar is fed by the drum, and then cut off, press the ball, press the angle and punch in turn to form four sequences. A machine can do it automatically. It is suitable for manufacturers who mass produce standard nuts or professional large and medium-sized enterprises that use standard nuts in large quantities.

ZS308 multi-station high-speed automatic cold heading machine

Model ZS308 multi-station high-speed automatic cold heading machine is an efficient automatic equipment for producing screws (bolts). The upsetting station of this machine tool is arranged horizontally. Cutting, initial punching, fine punching and twisting of cold-drawn plate (bar). Continuously manufacture finished products of screws (bolts).

1 1B-33B multi-position high-speed nut hardware molding machine

This model is the most advanced one at present, and can produce all kinds of special-shaped parts, especially those with holes and standard nuts. It has the characteristics of high precision (inner diameter tolerance 0.03mm, outer diameter 0. 10mm), high speed (80-240 pieces per minute) and low noise during production. Fully enclosed production makes production safer and cleaner.

Safety operation procedures of cold heading machine

1. It is forbidden to wear gloves to operate the cold heading machine.

2. Before driving, be sure to carefully check whether the fasteners of the equipment are locked and whether the safety protection devices are in good condition. Always check them at work to prevent them from loosening due to violent vibration and causing accidents.

3. After the equipment is adjusted, first pull the flywheel to check whether each mechanism works normally, and then remove the lever of the wrench car before starting the motor. It is forbidden to start the motor when pulling the car.

4. All faults should be eliminated before starting the machine, and the trial upsetting can only be carried out after a short time-space turn.

5. When the equipment is running, the operator should stand in a safe position. It is forbidden to pick up the workpiece at the concave-convex die, and the product can only be viewed at the lower end.

6. When replacing products, you must carefully adjust the die and punch, and carefully check whether all parts are normal.

7. In the production process, in case of failure, stop the machine immediately, find out the reason and eliminate hidden dangers. When the brakes fail, it is forbidden to drive.

8. Safety plates (safety rods) must be equipped with protective devices to avoid breakage and accidents. All protective devices shall not be disassembled or lost at will.