1、 Preparation before operation

1. Equipment inspection
   • Visual inspectionCheck the bending machine body, slider, workbench and other components for cracks, deformation or looseness to ensure structural integrity.
   • lubrication systemCheck whether the lubricating oil level is sufficient, whether the oil circuit is unobstructed, and regularly add or replace lubricating oil (such as N46 hydraulic oil).
   • hydraulic systemAfter starting the equipment, observe whether there is any leakage, abnormal noise or unstable pressure in the hydraulic pump, oil cylinder, valve and other components. The pressure gauge reading should meet the equipment requirements (such as 10-30MPa).
   • Electrical systemCheck if the power cord, control buttons, limit switches, etc. are intact, and if the grounding wire is reliably connected.
2. Mold installation and debugging
   • Mold selectionSelect the appropriate upper mold (V-shaped, U-shaped, etc.) and lower mold (V-shaped groove, flat mold, etc.) based on the thickness, material, and bending angle of the board, ensuring that the mold hardness (such as HRC50-55) and size match.
   • Installation steps：
     • Turn off the power, use a special tool to fix the upper mold on the slider, and install the lower mold in the T-shaped groove of the workbench. Tighten the bolts and check the verticality (deviation ≤ 0.1mm/m).
     • Adjust the mold gap: The gap should be 1.1-1.2 times the thickness of the sheet (such as 3.3-3.6mm for a 3mm thick sheet) to avoid being too small and causing indentation or too large and causing rebound.
   • trial runRun the slider up and down 2-3 times without load, check if the mold runs smoothly without any jamming or abnormal noise.
3. Board preparation
   • dimensional measurementMeasure the length, width, and thickness of the board with a tape measure or caliper to ensure compliance with processing requirements (such as length deviation of ≤± 1mm).
   • surface treatmentRemove oil stains, rust or oxide layers from the surface of the board to prevent affecting the bending quality.
   • Mark positioningUse a marker or template to mark the bending curve on the board, ensuring accurate positioning (deviation ≤± 0.5mm).

2、 Operation steps

1. Parameter Settings
   • bending angleSet the target angle (such as 90 °) through a numerical control system or mechanical limit device, with an error controlled within ± 1 °.
   • Pressing speedAdjust the pressing speed of the slider according to the material of the sheet (such as 0.5-1m/min for soft steel and 0.3-0.8m/min for stainless steel) to avoid cracking caused by excessive speed.
   • holding timeSet the holding time (e.g. 2-5 seconds) after the slider reaches the bottom dead center to ensure that the sheet is fully deformed.
2. Plate positioning
   • Rear material adjustmentAdjust the rear stop position manually or electrically to align it with the bent edge of the board (deviation ≤± 0.2mm).
   • Side blocking material positioningIf multiple bends are required, adjust the side blocking material to ensure that the bending position is consistent each time.
   • Plate fixationFix the board on the workbench with fixtures or magnetic suction cups to prevent sliding.
3. Bending operation
   • Single bending：
     • Start the device, slowly press down the slider until it contacts the board, and observe if the bending process is smooth.
     • After reaching the set angle, the slider automatically maintains pressure and returns, and the board is taken out to check the angle and surface quality.
   • Multi channel bending：
     • After completing the first bend, release the fixture and adjust the position of the board for the next bend.
     • Pay attention to the cumulative error of each bend and promptly correct the position of the rear stopper.
4. quality inspection
   • angle measurementMeasure the actual bending angle with an angle ruler or universal angle meter and compare it with the set value.
   • surface inspectionObserve whether there are cracks, indentations, or wrinkles in the bent area, and if necessary, grind or rework it.
   • Dimensional reviewMeasure the overall dimensions of the bent sheet to ensure compliance with the drawing requirements.

3、 Post operation maintenance

1. Equipment cleaning
   • Use compressed air to blow away metal debris on the surfaces of the workbench, mold, and slider to prevent scratches or sticking.
   • Wipe the equipment casing with a soft cloth and avoid using corrosive cleaning agents.
2. mold maintenance
   • After disassembling the mold, polish the working surface with oilstone or sandpaper to remove burrs and rust.
   • After applying anti rust oil, store it on a dedicated mold rack to avoid collision and deformation.
3. Hydraulic system maintenance
   • Regularly replace the hydraulic oil filter element (every 500 hours or 6 months) to prevent impurities from entering the system.
   • Check if the oil cylinder sealing ring is aging and replace it if necessary.
4. Electrical system inspection
   • Clean the dust inside the control box and check if the wiring terminals are loose.
   • Backup the CNC system program to prevent data loss.

4、 Safety precautions

1. personal protection
   • During operation, it is necessary to wear a safety helmet, protective goggles, anti smashing shoes, and gloves, and long hair should be tucked into the hat.
   • Do not wear loose clothing or jewelry to prevent getting caught up in the equipment.
2. Operating Specifications
   • It is strictly prohibited to reach out and adjust the sheet or mold during the operation of the slider.
   • When modifying parameters or debugging equipment, it is necessary to shut down and cut off the power supply.
   • When collaborating with multiple people, it is necessary to clarify the command signals to avoid misoperation.
3. emergency response
   • If the equipment emits abnormal noise, vibration, or oil leakage, immediately shut down and report to maintenance personnel.
   • In the event of a pinch or electric shock accident, immediately press the emergency stop button, cut off the power, and provide first aid.

5、 Common problem handling

1. Bending angle deviation
   • Reason: Excessive gap between molds, inaccurate positioning of the rear stopper, and material rebound.
   • Solution: Adjust the gap between the molds, correct the position of the blocking material, increase the holding time or pre pressing amount.
2. Surface indentation on the board
   • Reason: Insufficient hardness of the mold, poor lubrication, and excessive pressing speed.
   • Solution: Replace the hard alloy mold, apply lubricating oil, and reduce the pressing speed.
3. Sliding block running stuck
   • Reason: Insufficient lubrication of the guide rail, insufficient pressure in the hydraulic system, and wear of mechanical components.
   • Solution: Supplement lubricating oil, adjust hydraulic pressure, and replace worn parts.