Three Major Fault Types of Bending Machine and Their Treatment Methods

1. Insufficient Hydraulic Pressure of Bending Machine
Check the oil pump and oil circuit: Check whether the oil pump is turning correctly, whether the filter element is blocked, and replace the contaminated hydraulic oil. Deal with oil leakage and seal failure: Check whether the seal ring at the pipeline connection is aging, and replace the oil-resistant rubber plate; if the cylinder piston seal leaks, replace the Gly ring and clean the inner wall of the cylinder. Check whether the oil level in the oil tank submerges the filling port to avoid suction; increase the delay parameter before working to reduce hydraulic shock.
Check the proportional relief valve: Confirm whether the electromagnetic coil is energized and whether the voltage meets the standard, clean the obstruction of the cartridge valve or the main valve core, and avoid abnormal pressure caused by the blockage of the damping hole.

2. Bending Machine rail wear
Adjust the rail clearance: Check the wear degree of the rail pressure plate. If the wear is serious, replace the tin bronze plate or ductile iron pressure plate, and re-scrape the fitting surface to a contact rate of more than 85%.
Compensate for slider deformation: Install hydraulic compensation device or use gasket to offset the deviation of slider center caused by long-term high-tonnage operation, and reprocess the slider if necessary.
Calibrate mold alignment: Use laser to detect mold parallelism, adjust the gap between upper and lower molds, and ensure that the V-shaped opening width is adapted to the plate thickness (such as 1mm plate thickness corresponds to 6-8mm opening).
Repair worn mold: Regularly check the wear of mold radius, use grinding wheel to polish or replace new mold to avoid scratches on the workpiece surface.

3. Electrical system troubleshooting
Check circuit and protection device: Check whether the emergency stop button is released, whether the thermal relay is overloaded, test the status of AC contactor and circuit breaker, and repair loose cable connections.
Calibrate servo drive parameters: Check the servo motor encoder signal, adjust the proportional valve amplifier gain and zero position, and ensure synchronous movement of the slider.
Optimize CNC program: Check programming parameters (such as material thickness, mold impedance) to avoid cumulative errors leading to workpiece size deviation.