How to Maintain Bending Machine Dies?
Bending machines are a type of forging machinery primarily used in the metal processing industry. They are widely applied in various sectors such as light industry, aviation, shipbuilding, metallurgy, instrumentation, electrical appliances, stainless steel products, steel structure construction, and decoration. Bending machines are the preferred machinery for sheet metal processing, especially for large-sized sheet metal. They can perform various operations such as bending, stretching, rounding, and punching by using different types of dies. Bending machines can be classified into mechanical and hydraulic types. Hydraulic bending machines can be further categorized based on synchronization methods, including mechanical synchronization, torsion bar synchronization, mechanical-hydraulic synchronization, and electro-hydraulic synchronization. Hydraulic bending machines can also be classified based on the motion mode, such as upward and downward motion. Upward motion is more commonly used, where the worktable and workpiece remain stationary while the slider moves downward. Control methods for hydraulic bending machines include conventional control, economical CNC control, and standard CNC control.
Now, let's briefly discuss the characteristics of the WE67Y-63/2500 hydraulic sheet metal bending machine. WE67Y indicates that it is a hydraulic, upward motion, dual-cylinder, torsion bar synchronized, non-CNC machine, while 63/2500 represents a nominal pressure of 63 tons and a workpiece length of 2500mm. Here are its structure and features:
1. It adopts a fully welded steel structure that provides sufficient strength and rigidity. Internal stresses are eliminated through aging vibration or annealing furnace processes.
2. The wall plate has a C-shaped structure, allowing for the processing of large workpieces by placing two machines side by side.
3. The hydraulic system is located at both ends of the machine and connected to the slider, enabling direct driving of the sliding work.
4. The slider synchronization mechanism adopts torsion bar forced synchronization, ensuring smooth movement of the slider.
5. The positioning is achieved through a built-in mechanical block structure in the hydraulic cylinder, providing high repeatability in positioning accuracy.
6. The slider stroke and backgauge distance can be quickly adjusted by the motor and fine-tuned manually. The counter displays the values.
7. The slider can stop at any position, enhancing safety.
8. The upper die is equipped with a quick-clamping device, reducing mold changeover time and improving production efficiency. It also has a manual adjustment device, enhancing workpiece accuracy and mold lifespan.
9. It has a slightly weaker ability to withstand eccentric loads.
Operating Instructions and Precautions:
1. Strictly follow the safety operation regulations of the machine tool and wear appropriate protective equipment.
2. Before starting, carefully check the motor, switches, wiring, and grounding for normality and firmness. Ensure that all control components and buttons are in the correct positions.
3. Check the alignment and stability of the upper and lower dies. Verify that the positioning devices meet the processing requirements.
4. Power on, open the switch on the control panel, and then start the hydraulic pump.
5. After starting, run the machine without a workpiece for 5-10 minutes. Move the slider to its full stroke 2-3 times. If any abnormal sound or malfunction is detected, stop the machine immediately, troubleshoot the issue, and resume operation only when everything is normal.
6. Assign one person to coordinate the operation, ensuring close cooperation between the operator and the feeding and pressing personnel. This guarantees that all personnel are in safe positions before giving the bending signal.
7. When bending the sheet metal, always stand behind it and support it with both hands to prevent injury from the sheet metal lifting during bending.
8. The width of the lower die opening should generally be no less than 8 times the thickness of the sheet metal. If the R radius cannot meet the requirements, it can be slightly smaller under sufficient pressure.
9. When the slider of the machine reaches the bottom, ensure that there is a gap equal to the thickness of one plate. Otherwise, it may cause damage to the dies and the machine.
10. No one is allowed to stand at the rear of the machine during operation.
11. It is strictly prohibited to bend the sheet metal by applying pressure on one end only.
12. If any abnormalities are observed during operation, stop the machine and correct the issue. Do not attempt to manually correct any deviations while the machine is running to avoid hand injuries.
13. Do not exceed the bending capacity of the machine to avoid damage to the machine tool.
14. Regularly check the alignment of the upper and lower dies and the readings on the pressure gauge to ensure compliance with specifications.
15. When adjusting the pressure plate for the workpiece, cut off the power supply and stop the machine before making any changes.
16. When changing the opening of the variable lower die, ensure that no material is in contact with the lower die.
17. Immediately stop the machine and investigate the cause if any abnormalities occur. Take prompt action to resolve the issue.
18. Before shutting down, place wooden blocks on both sides of the lower die to lower the upper slider onto the blocks.
