The history and working principle of the cold heading machine The world's earliest cold heading machine originated in Germany. At that time, the purpose of developing the cold heading machine was mainly to manufacture bullet casings in large quantities during World War II
(1) According to the theory of metal plasticity, a certain pressure is applied to the metal blank at room temperature to produce plasticity in the mold cavity and form according to the specified shape and size.
(2) It is necessary to choose high-quality metal materials with good "plasticization", such as rivet steel, which has strict standards for chemical composition and mechanical properties.
(3) There are many models and series of cold heading bolt and nut forming machinery. The equipment has reliable performance, high efficiency and stable product quality.
(4) The product has a large forming and forging force, the configuration power is in, and the equipment is invested in a large time. Therefore, it is most economical to produce up to M24.
(5) It has good surface quality and high dimensional accuracy. Due to the existence of cold work hardening in the upsetting process, the deformation should not be too large. Reduces cracking.
(6) The cold heading process is applicable to products with large batches and various specifications, so as to reduce costs. The modern cold heading machine has been increased from the simple two stations in the past to multiple stations, at present, the newer varieties in China have 6 molds, 7 molds, 8 molds and other elongated cold heading machines, which is a special cold heading equipment for blanks, and the material on the wire tray frame is fed by rollers, and then six processes such as cutting, ball pressing, pressure angle, punching, and forming are carried out in turn, and a machine can be completed automatically, which 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 and nuts. Note: According to user requirements, we can specialize in the production of non-standard forming automatic cold heading machines such as seven stations and eight stations. The multi-station automatic nut cold heading machine adopts a horizontal arrangement. The finished product is manufactured by cold-drawn coil material through cutting, initial punching, fine blanking, and other processes. Hardware parts forming machine This model is the most advanced model at present, which can produce all kinds of special-shaped parts, especially the production of special-shaped parts with holes and standard nuts, with high precision (inner diameter tolerance of 0.03mm, outer diameter of 0.03mm) and fast speed (80-240 pieces per minute), and the sound of production is small, and the production of fully sealed production makes the production safer and cleaner.
Cold heading machine safety operation procedures
1. It is forbidden to wear gloves to operate the cold heading machine.
2. Before driving, you must carefully check whether the fasteners of the equipment are locked, whether the safety protection devices are in good condition, and check them frequently during the work to prevent them from loosening due to severe vibration and causing accidents.
3. After the equipment is adjusted, first pull the flywheel to check whether the work of each mechanism is normal, and then start the motor only after removing the wrench used for the wrench. It is strictly forbidden to start the motor while triggering the car.
4. All faults should be eliminated before starting, and after a short period of empty rotation, the test heading can be carried out.
5. In the operation of the equipment, the operator should stand in a safe position, and it is strictly forbidden to pick up the workpiece at the concave and convex die, and can only view the product at the lower end.
6. When replacing the product, the mold and punch must be carefully adjusted, and the parts must be carefully checked to see if they are normal.
7. In the production process, if there is a failure, it must be stopped immediately, the cause must be identified, and the hidden danger must be eliminated. When the brakes fail, it is strictly forbidden to drive.
8. The fuse plate (bumper) must be equipped with a protective device to avoid accidents caused by rupture. All protective devices shall not be arbitrarily disassembled or lost.
Peculiarity
1. The connection between the crankshaft and the body and the impact connecting rod are connected by bearings imported from Sweden and high wear-resistant alloy copper tiles, which are flexible in operation, large in bearing capacity, long in service life and low in maintenance cost.
2. The body is cast by ductile iron 500 with added alloy, which has high tensile strength and good wear resistance.
3. Equipped with brakes to reduce motor power energy consumption.
4. The cutting system adopts a guide plate to drive the cutter rod, the guide plate reciprocates, and the cutting force is transmitted in a straight line, with large and stable force and good dynamic balance.
5. The clamp system can be flipped or translated 180 degrees. It is conducive to the arrangement of molding process.
6. Equipped with frequency conversion speed regulation device, which can adjust the speed within a certain range.
7. Equipped with fault detector and safety protection device, it will automatically stop when the equipment fails, giving the equipment and tools the greatest protection.
8. The thrust device is installed in the feeding box to improve the feeding accuracy.
