company news about 5 Steps to Master: Leveling Roll Adjustment & Lubrication for Welded Pipe Mills

Introduction
Leveling rolls are the "throat" of your pipe mill. Improper adjustment causes steel strip deviation and pipe distortion! Master these 5 steps to reduce failures by 40%↑.

STEP 1: Shutdown Inspection (Daily)

Critical Actions:
√ Roll Cleaning: Remove residual debris between rolls with a copper brush (Wire brushes strictly prohibited!).
√ Dent Check: Run fingers over roll surfaces – halt production if dents are detected.
Safety: Lock out power before inspection!

STEP 2: Gap Adjustment (When switching plate thickness)

Precision Rule:
“Loosen one turn for thick plates, tighten half-turn for thin plates”

Tools: 24mm socket wrench + feeler gauge

Standard Gap: Plate thickness × 1.2 (e.g., 1mm plate → 1.2mm gap)
▶ Verification: Observe strip edges after feeding – no waviness = correct adjustment

STEP 3: Roll Pressure Calibration (Weekly)

Prevent Uneven Wear:

Feed 2m scrap strip through rolls

Check impressions after shutdown:

Deeper impression side: Loosen adjustment screw 1/8 turn counterclockwise

Lighter impression side: Tighten screw 1/8 turn clockwise

STEP 4: Lubrication (Every 8 hours/shift)

3 Forbidden Practices:
❌ Greasing bearings directly → Use lithium-based grease + quantitative oil gun quantitative filling
❌ Applying oil to roll surfaces → Causes slippage! Lubricate only bearing end caps
❌ Mixing grease types → Chemical reactions cause hardening

STEP 5: Monsoon Special Care (India-Specific)

High-Humidity Solutions:
Grease Upgrade: Switch to NLGI Grade 2 water-resistant grease
Rust Prevention: Apply ≥3mm silicone sealant on roll end caps
Gap Compensation: Increase gap by 0.05mm when humidity >80%

Maintenance Benefits
▶ 15% faster strip feeding | ▶ 2X longer roll life | ▶ Pipe straightness ≤0.5mm/m deviation

Emergency Response:
Abnormal roll noise → IMMEDIATE shutdown! Inspect bearing cages
Continuous strip deviation → Priority check on Roll #3/#5 levelness

Zhongyue Metallurgy Equipment Technology Co., Ltd, based in Zhangjiagang, China, pioneers precision metallurgical equipment manufacturing. With 150+ annual productions, our high-frequency welded pipe mills and H-beam lines empower automotive, medical, and renewable energy industries. Committed to R&D excellence and customer-centric innovation, we drive smart manufacturing evolution globally.