1. What are the characteristics of cold heading 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, and it is formed according to the specified shape and size.
2. High-quality metal materials with good plastic deformation 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 forming upsetting force is large, and the configuration force is put into the equipment at one time. Therefore, it is most economical to produce products with smaller specifications.
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 large quantities of products with various specifications to reduce the cost.
Second, the main advantages of cold heading raw materials:
1. Compared with thick hot rolled steel plate, cold-formed steel can be processed into smaller load and shorter span.
2. Unconventional cross-sectional shape can be obtained economically by cold forming, and satisfactory strength-to-weight ratio can be obtained.
3. Considering the compactness of packaging and transportation, nestable parts can be produced.
4. There is no expansion and deformation under the action of environmental gravity.
Third, the advantages of cold heading machine equipment
1, the crankshaft, engine block and impact connecting rod are all connected by high wear-resistant alloy copper tiles, which has excellent bearing capacity.
2. The machine body is made of alloy ductile iron with high tensile strength and good wear resistance.
3. Adopt two-stage gear transmission system, which has high transmission efficiency and large transmission torque.
4. Equipped with pneumatic clutch brake to reduce the power and energy consumption of the motor.
5. The cutting system uses the guide plate to drive the cutter bar, the guide plate moves back and forth, and the cutting force is transmitted in a straight line, which is large and stable and has good dynamic balance.
6. The clamping system can rotate or translate, which is beneficial to the arrangement of molding process.
7. Equipped with frequency conversion speed regulating device, stepless speed regulation can be carried out within a certain range.
8, equipped with fault detector and safety protection device, when the equipment fails, it will automatically stop, giving maximum protection to equipment and tools.
9. The feed box is equipped with a thrust device to improve the feed accuracy.
Four, cold heading machine equipment operation matters needing attention
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, whether the safety protection device is in good condition, and check it frequently at work to prevent it from loosening due to violent vibration and causing accidents.
3. After the equipment is adjusted, first pull the flywheel to check whether the institutions work normally. The motor can only be started after the joystick of the vehicle is removed. It is forbidden to start the motor when pulling the car.
4, should eliminate all faults before driving, and turn for a short time, before heading.
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 process of production, such as failure must immediately stop, find out the reason to eliminate hidden dangers, it is forbidden to drive when the brake fails.
8, bumper must be equipped with protective devices, in order to avoid rupture accident. All protective devices shall not be disassembled or lost at will.
The above is a brief introduction to the cold heading process of fasteners, and reasonable arrangement of the process is helpful to improve product quality and production efficiency.