A model-bound workflow for threading, opening the upper frame, cleaning rolls, closing the head and verifying the next sample.
Confirm the Machine Before Using This Workflow
Open-type, tilting, hinged and cassette designs do not all open the same way. Identify the model, opening angle or travel, actuator, mechanical support, interlocks, pinch points and approved lifting/holding method from the manual. Do not transfer pressures, fastener torques or support methods from another machine.
Threading and Initial Setup
- Confirm material grade, thickness, width, surface and approved machine range.
- Inspect the leading edge; remove unsafe burrs or hooks by the approved method.
- Place the line in the specified manual/threading mode and establish a controlled path from decoiler to leveler.
- Use the machine’s threading aids and safe tools; keep hands out of pinch points.
- Start with the recorded recipe or the manual’s initial reference, then verify a short sample before automatic operation.
Opening and Cleaning the Roll Bank
Shut down, isolate every applicable energy source, control stored energy and verify the zero-energy state.
Use the designed support or locking device. Never rely only on hydraulic or pneumatic pressure.
Look for embedded particles, adhesive, metal pickup, rust, scoring, loose parts and abnormal bearing or gear evidence.
Select a lint-free cloth and cleaner compatible with the roll finish, seals, coating and work material.
Remove tools, release supports in the specified order, confirm interlocks and run a representative sample.
Log the reason, condition found, cleaning method, parts replaced and post-maintenance result.
Maintenance by Condition and Manufacturer Interval
| Area | Operator check | Escalate when |
|---|---|---|
| Work rolls | Contamination, scoring, pickup, corrosion, visible damage | Marks repeat on the strip or roll damage is visible |
| Parallelism/position | Recorded setting, side-to-side consistency, abnormal drift | Correction requires repeated unequal changes |
| Gears/bearings | Noise, heat, vibration and lubrication condition | Temperature or sound changes abruptly |
| Opening system | Interlocks, supports, hoses/cylinders and mechanical locks | Any leak, damage or unreliable holding is found |
| Electrical/control | Alarms, sensors, cables and enclosure condition | Interlock bypass or recurring fault is suspected |
Do not publish or apply a universal daily/monthly replacement interval. Use the machine manual, operating hours, contamination level, material surface and condition history to set the maintenance plan.
After-Maintenance Verification
Confirm guards and interlocks, remove tools, restore energy under the approved procedure, jog without material where allowed, then run a representative sample at reduced speed. Check surface marks, tracking and flatness using the agreed method before returning the line to production.
Related HENLI Resources
Cleaning-focused page retained for its independent query intent.Troubleshooting Center
Route symptoms before changing settings.Leveler Families
Confirm the actual mechanism and model.
Frequently Asked Questions
Can the head be opened while the machine is energized?
Follow the supplied machine and employer procedure. Cleaning or maintenance that exposes a person to unexpected motion or stored energy requires effective energy control; normal controls are not a substitute.
Does a flip-open head improve flatness by itself?
No. It improves access. Flatness depends on the roll system, material, setup and measurement method.
What if marks remain after cleaning?
Stop changing pressure blindly. Check whether the mark repeats with roll circumference, inspect material contamination and protection film, and escalate possible roll damage or misalignment.
Confirm the Correct Open-Type Procedure
Send the model, serial number, material and symptom so the correct manual and service boundary can be checked.
