Steel Bending Equipment Maintenance Guide
I. Steel Bending Equipment Daily Maintenance
steel bending equipment, Before starting the machine each day, perform the following checks:
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Inspect power cords and hydraulic pipelines for damage or leaks
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Ensure all fastening bolts are tight and secure
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Test the emergency stop switch for responsiveness and reliability
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Check the bending mold for cracks or excessive wear
2. Operational Precautions
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Do not exceed bending capacity (e.g., avoid bending Φ25 rebar with a Φ20 mold)
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Pause every 2 hours of continuous operation for at least 15 minutes
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Stop immediately if abnormal noise, vibration, or overheating occurs
II. Maintenance Schedule for Key Components
| Component | Maintenance Task | Interval |
|---|---|---|
| Transmission Gears | Apply grease | Weekly |
| Hydraulic System | Check oil level and replace filter element | Monthly |
| Electrical Circuit | Perform insulation resistance test | Quarterly |
| Bending Spindle | Replace bearings | Annually |
III. Hydraulic System Maintenance
1. Hydraulic Oil Management
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Use ISO VG46 anti-wear hydraulic oil
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First oil change after 500 operating hours
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Subsequent changes every 2,000 hours or annually, whichever comes first
2. Common Hydraulic Faults & Remedies
| Issue | Possible Cause | Suggested Action |
|---|---|---|
| Insufficient pressure | Overflow valve misadjusted or oil pump worn | Re-adjust valve / Inspect or replace pump |
| High oil temperature | Clogged radiator or unsuitable oil viscosity | Clean radiator / Use proper oil grade |
IV. Mechanical Component Maintenance
1. Transmission Mechanism
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Use lithium-based grease (NLGI Grade 2)
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Continue greasing until old lubricant is fully expelled
2. Bending Mold Maintenance
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Ensure the central axis alignment is within 0.5mm during installation
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Replace the mold if the working surface wear exceeds 3mm
V. Electrical System Maintenance
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Test motor insulation regularly using a megohmmeter (resistance should be ≥ 1 MΩ)
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Polish contactor contacts every six months to ensure good conductivity
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Install an overload protector rated at 1.2 times the motor’s rated current
VI. Seasonal Maintenance Guidelines
Winter
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Replace hydraulic oil with a low-temperature variant (e.g., HV series)
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Run the machine at no load for 10 minutes before operation to warm up the system
Rainy Season
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Install moisture-proof heating elements on motors
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Apply rust-prevention oil to guide rails and exposed surfaces during storage
VII. Safety Warnings
❗Important Precautions During Maintenance:
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Disconnect and lock out power supply (LOTO)
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Fully depressurize the hydraulic system before opening any components
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Display a “Maintenance in Progress” warning sign to prevent accidental startup
