How to use the bending machine

Apr 07, 2024
Press brake

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Using a press brake involves a series of steps to bend metal sheets effectively and safely. Here's a breakdown of the basic procedure:

Preparation Before Startup:
- Inspect the surrounding area of the press brake, ensuring a clear and clutter-free workspace.
- Ensure the operator wears appropriate personal protective equipment (PPE) such as safety glasses, gloves, and ear protection if necessary.
- Check that all safety devices are functioning properly, including safety guards, light curtains, and emergency stop buttons.
- Connect the power supply and start the hydraulic or electric system, verifying that the oil pressure and power supply are within normal operating ranges.
Die Installation and Adjustment:
- Select the appropriate upper and lower dies based on the thickness of the material to be bent and the desired bend angle. Ensure they are securely fastened in place.
- Adjust the die gap to match the thickness of the metal sheet being bent, ensuring both an effective bend and prolonged die life.
Parameter Settings:
- For CNC press brakes, use the control panel or computer system to input or call up a bending program, setting parameters such as bend angle, bend length, backgauge position, stroke, and more.
- For non-CNC press brakes, manually adjust the backgauge and ram position according to the bend locations and depths determined by experience or drawings.
Test Run and Inspection:
- Before bending actual material, conduct a dry run to ensure smooth upward and downward movement of the ram and accurate limit switches for the stroke.
- For CNC machines, perform a simulation to verify that the bending sequence and movements are correct.
- Check the alignment and squareness of the workpiece and the tools, making any necessary adjustments.
Material Handling:
- Securely clamp or fixture the metal sheet onto the bed of the press brake, aligning it accurately with the backgauge and dies.
- Depending on the machine, engage the bending process either through a foot pedal or by starting the programmed cycle.
Monitoring and Quality Control:
- Closely monitor the bending process, ensuring it proceeds smoothly without any abnormalities.
- After bending, inspect the finished part to ensure it meets the required specifications. If necessary, make adjustments to the machine settings, tooling, or process parameters.
Post-Operational Steps:
- Shut down the machine according to the manufacturer's instructions, releasing hydraulic pressure (if applicable) and ensuring all moving parts have come to a complete stop.
- Clean the work area, remove any scrap metal, and maintain the machine according to the recommended maintenance schedule.

Always consult the specific machine's operator manual for detailed instructions and safety guidelines before operating a press brake. Proper training and adherence to safety protocols are paramount.