Before using a press brake, it is crucial to thoroughly read and understand this guide to ensure safe and effective machine operation.
Preparation
Connecting Power
1. Turn on the Power: Switch on the key switch located on the control panel.
2. Start the Oil Pump: Press the oil pump start button. You should hear the sound of the oil pump operating.
3. Test Run: Before beginning any bending operations, perform a test run to ensure the machine is functioning correctly.
Stroke Adjustment
Proper stroke adjustment is vital to avoid damage to the molds and the machine.
1. Setting the Stroke: Ensure that when the upper mold moves down to the bottom, the gap between it and the lower mold is equal to the thickness of the sheet being bent.
2. Adjustment Methods: This can be done through either electric rapid adjustment or manual fine-tuning.
Selection of Bending Slot
Choose the appropriate bending slot based on the thickness of the sheet metal.
1. Slot Width Recommendation: The width of the slot should be eight times the thickness of the sheet metal.
2. Example: For bending a 4mm thick sheet, select a slot with a width of 32mm.
Back Gauge Adjustment
The back gauge is used to control the bending depth.
1. Adjustment Methods: Typically, the back gauge can be adjusted using electric rapid adjustment or manual fine-tuning, similar to the adjustment method used for shearing machines.
Bending Operation
1. Initiating Bending: Press the foot switch to start the bending process.
2. Pausing Bending: You can release the foot switch at any time to stop the bending.
3. Continuing Bending: Press the foot switch again to resume the bending process.
Troubleshooting
Here are some common press brake faults and their solutions:
| Fault | Solution |
|-------|----------|
| E21 system Y-axis settings do not move | Check if the Y-axis bearings or transmission system are jammed or damaged. |
| X-axis driver does not display when powered on | Check the voltage in the power control circuit or if there are faults in the driver control circuit. |
Safety Precautions
1. Personal Protective Equipment: Always wear safety gear, such as gloves, safety glasses, and earplugs, before operating the press brake.
2. Work Area Maintenance: Keep the work area clean and tidy to avoid tripping or slipping hazards.
3. Avoiding Contact: Do not touch the bending area with your hands while the machine is in operation.
4. Regular Maintenance: Perform regular maintenance and upkeep of the machine to ensure safety and optimal performance.
Detailed Guide for Operating a Press Brake
Initial Setup
1. Power Connection: Ensure the machine is connected to a stable power source and that all electrical connections are secure.
2. Oil Pump Activation: Starting the oil pump is crucial for hydraulic press brakes. Listen for any unusual noises that might indicate issues.
3. Test Run: Perform a dry run without any material to check for smooth operation and to ensure that all safety mechanisms are functioning.
Stroke Adjustment Details
1. Determining the Stroke Length: Measure the sheet metal thickness accurately.
2. Setting the Stroke: Use the control panel to set the stroke. For manual adjustments, use the provided handwheel or dial.
3. Checking Clearance: Verify that the clearance between the upper and lower molds is precisely set to avoid any collision that could damage the molds.
Choosing the Correct Bending Slot
1. Slot Width Calculation: Multiply the sheet thickness by 8 to determine the slot width.
2. Slot Selection: Refer to the machine’s manual for recommended slot widths based on different materials and thicknesses.
3. Installing the Slot: Ensure the slot is properly secured and aligned with the upper and lower molds.
Adjusting the Back Gauge
1. Setting the Back Gauge: Use the control panel to set the desired distance for the back gauge.
2. Manual Fine-Tuning: If necessary, use the manual adjustment knobs to make precise changes.
3. Verification: After adjustment, verify the position by measuring the distance between the back gauge and the bending line on the sheet metal.
Conducting the Bending Operation
1. Placing the Sheet: Position the sheet metal correctly against the back gauge.
2. Starting the Bending Process: Press the foot pedal to initiate the bending cycle.
3. Stopping Mid-Cycle: Release the foot pedal if you need to stop the process for adjustments.
4. Continuing the Cycle: Press the foot pedal again to continue the bending process from where it was paused.
Troubleshooting Common Issues
E21 System Y-Axis Issues
- Symptoms: Y-axis settings do not respond.
- Solution: Inspect the Y-axis bearings and transmission for any blockages or damage. Lubricate or replace components as necessary.
X-Axis Driver Power Issues
- Symptoms: The driver does not display when powered on.
- Solution: Check the electrical connections and ensure the power supply is within the required voltage range. Inspect the driver control circuit for any faults or disconnections.
Ensuring Safety During Operation
1. Wearing Safety Gear: Always wear appropriate personal protective equipment to prevent injuries.
2. Maintaining Cleanliness: A clean workspace reduces the risk of accidents caused by tripping or slipping.
3. Avoiding Direct Contact: Never place your hands near the bending area while the machine is operating.
4. Regular Inspections: Schedule routine inspections to identify and fix any potential issues before they lead to accidents or machine failure.
Conclusion
By following this comprehensive guide, operators can ensure the safe and effective use of press brakes. Proper preparation, accurate adjustments, and regular maintenance are key to achieving high-quality bending results while maintaining a safe working environment. Understanding the machine’s functions and adhering to safety protocols will help prevent accidents and extend the lifespan of the equipment.
