Material Deviation Fault on GLS-500 2-in-1 Uncoiler & Straightener, Solving Strip Camber and Edge Offset for Automotive

Troubleshooting of Material Deviation Fault on GLS-500 2-in-1 Uncoiler & Straightener, Solving Strip Camber and Edge Offset for Automotive Stamping Production Line

Our after-sales engineering team received a service call from an automotive component manufacturer in Jiangsu. The customer’s GLS-500 two-in-one uncoiler and straightener matched with 160T mechanical punch suffered frequent material deviation during continuous stamping. The strip kept shifting sideways, resulting in inconsistent blank size and 12% scrap rate rise. The equipment ran at 18 strokes per minute, and the material offset fluctuated between 0.8 mm to 3.2 mm. Our technicians arrived on site, inspected roller parallelism, corrected tension setting and re-calibrated guide rollers. After adjustment, the material offset was controlled within 0.15 mm, scrap rate dropped to less than 1.2%, and the production line resumed stable operation.

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Press Release Q&A

Q1: What directly caused the material deviation on this GLS-500 straightener?

A1: The main causes were uneven upper and lower roller parallelism, improper coil tension and worn side guide roller bearings.

Q2: Does material deviation only affect the finished blank dimension?

A2: No. Severe offset may cause die chipping, scratch the strip surface and even trigger emergency stop of the punch press.

Q3: Can operators adjust the guide rollers by themselves during production?

A3: Fine adjustment is allowed, but large parallelism correction needs professional tools and certified service engineers.

Q4: What material was being processed on this production line?

A4: Hot-dip galvanized steel with thickness 1.2 mm, width 380 mm for automotive bracket parts.

Q5: How long did the whole on-site troubleshooting and commissioning take?

A5: Total on-site working time was 4.5 hours, including disassembly inspection, adjustment and trial stamping verification.

Q6: What regular maintenance items help prevent recurring material deviation?

A6: Check bearing lubrication, measure roller parallelism, clean roller surface and calibrate side guides every 300 working hours.