A CNC press brake is a machine used to bend cold metal sheets into various geometric cross-sectional shapes using molds. It is widely utilized in industries such as automotive, aerospace, light industry, shipbuilding, container manufacturing, elevator production, and railway vehicle manufacturing. This manual provides comprehensive guidelines for the safe and efficient operation of a CNC press brake.
Safety Operating Procedures
1. Adhere to Safety Regulations: Always follow the safety operating procedures specific to machine tools.
2. Wear Protective Gear: Ensure you are wearing appropriate personal protective equipment (PPE) such as gloves, safety glasses, and ear protection.
3. Pre-Start Inspection: Before starting the machine, check all parts for normal and secure operation.
Operating Steps
1. Pre-Start Inspection
- Check Electrical Components: Inspect the motor, switches, wiring, and grounding for any irregularities.
- Inspect Molds: Ensure the upper and lower molds are properly aligned and securely fastened.
- Verify Positioning Devices: Confirm that all positioning devices meet the requirements for the workpiece to be processed.
2. Power Connection
- Turn On the Power: Switch on the power on the control panel.
- Start the Oil Pump: Press the oil pump start button to activate the hydraulic system.
3. Idle Run
- Run the Machine Empty: Allow the machine to run idle for 5-10 minutes.
- Full Stroke Movement: Operate the upper slider through its full stroke 2-3 times to ensure smooth movement.
- Address Any Issues: If any abnormalities are detected, stop the machine immediately and resolve the issue.
4. Working Operation
- Coordinate Operations: One person should be designated to give commands, ensuring clear communication.
- Team Cooperation: The operator and the person feeding the sheet must work closely together.
- Safety Positioning: Ensure all personnel are in safe positions before initiating the bending process.
- Handle Sheets Carefully: Hold the sheet with both hands during bending to prevent it from lifting and causing injury.
Detailed Operation Instructions
1. Connecting the Power
- Turn On the Key Switch: Insert and turn the key to power on the machine.
- Start the Oil Pump: Press the oil pump start button to initiate the hydraulic system.
2. Stroke Adjustment
- Adjust the Stroke: Ensure that when the upper mold descends to its lowest point, there is a gap equal to the thickness of the sheet.
- Methods of Adjustment: Use electric quick adjustment for rapid changes or manual fine-tuning for precise adjustments.
3. Selecting the V-Die
- Choose the Correct Slot: The width of the slot should be eight times the thickness of the sheet metal. For example, for a 4mm sheet, a 32mm wide slot is required.
- Installation: Properly install and align the V-die with the upper and lower molds.
4. Back Gauge Adjustment
- Adjustment Methods: The back gauge can be adjusted using electric quick adjustments or manual fine-tuning, similar to a shearing machine.
- Verify Settings: Ensure the back gauge is correctly set to control the bending depth accurately.
5. Initiating the Bending Process
- Start Bending: Press the foot switch to begin the bending operation.
- Pause and Resume: Release the foot switch to stop bending. Press it again to continue.
Important Considerations
1. Adjusting for Different Materials: Different sheet materials require different bending parameters. Adjust settings according to the specific material being used.
2. Maintain Sharp Molds: Dull molds can lead to uneven bends. Regularly check and maintain the sharpness of the molds.
3. Regular Maintenance: Perform routine maintenance and servicing of the machine to ensure stable performance.
Conclusion
Operating a CNC press brake involves careful preparation, precise adjustments, and adherence to safety protocols. By following this comprehensive guide, operators can ensure safe and effective use of the machine, achieving high-quality bending results while maintaining a secure working environment. Regular maintenance and correct operational procedures are essential for the longevity and optimal performance of the equipment.
