The cold heading machine is a special equipment mainly used for mass production of nuts, bolts and other fasteners.
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 mass-produce bullet casings during World War II
Cold heading process
(1) According to the theory of metal plastic transformation, the metal blank is subjected to A certain pressure causes plastic deformation in the mold cavity and molding according to the specified shape and size.
(2) High-quality metal materials with good "plastic deformation" must be selected, such as rivet steel, which has strict standards for its chemical composition and mechanical properties.
(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 forming and upsetting force is large, the configuration power is high, and the equipment investment is large at one time. Therefore, it is most economical to produce specifications below M24.
(5) It has good surface quality and high dimensional accuracy. Because there is cold work hardening during the upsetting process, the deformation should not be too large. Reduce cracking.
(6) The cold heading process is suitable for products with large batches and various specifications, so as to reduce costs.
Modern cold heading machines have been increased from simple two-station to multi-station in the past. At present, the newer varieties in China include 5-mold, 6-mold and 6-mold extended cold heading machines. Z12 series double-click the entire mold to automatically cold Heading machine
This machine uses plate material and straight bar material, and uses the principle of secondary upsetting to produce various head, countersunk head, semi-countersunk head, hexagon socket and other non-standard head-shaped bolts and machinery Parts, the equipment is easy to operate, the process is simple, and the male mold can be customized to launch the slender specification protective device and pull-out mechanism.
z18-5 two-die four-punch cold heading machine is mainly used for the production of screws, rivets and other fasteners.
Z41-24 multi-station automatic nut cold heading machine
This machine is a special cold heading equipment for producing hexagonal nut blanks. The material on the bar is fed through rollers. Then, the five processes of cutting, ball pressing, corner pressing, punching, and forming are carried out in sequence. One machine can automatically complete it. It is suitable for batch or professional production of nut standard parts manufacturers and large and medium-sized enterprises that use a large number of standard parts nuts. enterprise. Note: Six-station, seven-station and other non-standard forming automatic cold heading machines can be specially produced according to user requirements.
Z41-30 multi-station automatic nut cold heading machine
This machine is a special cold heading equipment for producing hexagonal nut blanks. The material on the bar is fed through rollers. Then the four steps of cutting, ball pressing, corner pressing and punching are carried out in sequence, which can be completed automatically by one machine. It is suitable for manufacturers of batch or professional production of nut standard parts and large and medium-sized enterprises that use a large number of standard parts nuts.
ZS308 multi-station high-speed automatic cold heading machine
The ZS308 multi-station high-speed automatic cold heading machine is an efficient automatic equipment for manufacturing screws (bolts). The upsetting stations of this machine tool are arranged horizontally. The cold-drawn disc (bar) material is used for cutting, initial punching, fine blanking, thread rolling and other processes. Continuous manufacturing of finished screws (bolts).
11B-33B multi-station high-speed nut and hardware parts forming machine
This model is currently the most advanced model and can produce various special-shaped parts, especially those with holes The production of special-shaped parts and standard nuts has the characteristics of high precision (inner diameter tolerance 0.03mm, outer diameter 0.10mm), fast speed (80-240 pieces per minute), and low sound during production. Fully sealed production makes production more efficient. Safer and cleaner.
Safe operating procedures for cold heading machines
1. It is prohibited to wear gloves to operate the cold heading machine.
2． Before driving, you must carefully check whether the fasteners of the equipment are locked and whether the safety protection devices are intact. Check frequently during work to prevent loosening due to severe vibration and causing accidents.
3． After the equipment is adjusted, first pull the flywheel to check whether the various mechanisms are working normally. Only after removing the lever for the pulley can the motor be started. It is strictly prohibited to start the motor while pulling the car.
4. All faults should be eliminated before starting up, and the machine can be tested after idling for a short time.
5. When the equipment is in operation, the operator should stand in a safe position. It is strictly forbidden to pick up the workpiece at the concave and convex mold, and can only view the product at the lower end.
6. When replacing products, the mold and punch must be carefully adjusted, and each component must be carefully checked to see if it is normal.
7. During the production process, if a malfunction occurs, it must be stopped immediately to find out the cause and eliminate the hidden danger. It is strictly forbidden to drive when the brakes fail.
8． The insurance plate (bumper) must be equipped with a protective device to prevent it from breaking and causing an accident. All protective devices must not be disassembled or lost at will.