Common Faults of Hydraulic Shearing Machines

1. Hydraulic System Failure

Insufficient shearing force - Cannot cut materials of set thickness Causes: Hydraulic oil contamination, low oil level, or pump wear

Oil leaks at cylinder piston rods and valve interfaces due to seal aging or loose connections
Abnormal pump noises caused by air in system, clogged filters, or pump wear
Pressure drops resulting from internal leakage in valves or cylinders
Overheating due to contaminated oil or insufficient cooling

Blade cracking - Shows irregular notches on cut edges Causes: Overly hard materials or substandard blade quality

Excessive blade wear - Results in increased burrs and precision loss Causes: Poor lubrication or incorrect gap adjustment

Uneven blade gaps cause material distortion during shearing, typically from loose tool holder bolts or worn guide rails.

Backgauge inaccuracy - Causes dimensional deviations in cuts Causes: Worn lead screws, slipping belts, or encoder failures

Tool holder jamming - Leads to unsmooth operation Causes: Poor rail lubrication, worn sliders, or foreign object obstruction

Unresponsive control panel - Prevents machine operation Causes: Power issues, blown fuses, or PLC controller failure

Travel switch failure - Causes overtravel or incomplete cuts Causes: Oxidized contacts or misaligned trigger mechanisms

Regular maintenance and prompt troubleshooting can prevent these common faults and maintain optimal shearing performance.