A Comprehensive Guide to the Daily Maintenance and Care of Steel Tube Mill Lines

In a tube production line, The long-term stable operation of equipment is the core of product quality, production efficiency in a carbon pipe manufacturing machine production line. As a delicate and complex production system, the maintenance of steel pipe making machine performance is not once for all.As an old saying goes, “A workman must first sharpen his tools if he is to do his work well.”
At the heart of keeping this “tool” sharp and efficient at all times is a scientific and strict daily maintenance and care system.

I.Why the maintenance and care is the lifeline of steel tube mill?

It is inevitably that the machine experiences functional degradation after long-term, high-load operation. Electrical components age,resulting in parameter variation; some action components may malfunction; connections between various mechanisms may become loose or rusted; rollers and bearings wear over time; lubricating oil failed; and the stability of hydraulic circuits decreases.

These issues act like “chronic illnesses” in equipment—if neglected, they eventually result in sudden malfunctions, unplanned shutdowns, and huge losses. Therefore, regular maintenance is not only an cost expenditures, but also a crucial investment in long-term stability and productivity.

The key point of maintenance is lubrication and wear prevention, complemented by cleaning, moisture protection, vibration control, ventilation, and the routine inspection of all mechanical and electrical connections for accuracy and reliability.

II. Five key points for Daily Maintenance and Care

1. Cleaning and Inspection: The healthy check of every operation

（1）Cleaning Tasks:
Before each operation, Carrying out a complete cleaning of the erw tube mill. Remove dust, metal scale, and other debris, and wipe down all machine surfaces.
A clean environment helps keep contaminants from entering transmission or lubrication systems, which reduces abnormal wear to some extent.

• Safety First:
  Be sure to cut off the main power before cleaning. All cleaning work under power-off conditions to ensure safety.

（2）Routine Inspection:
Conduct a mechanical inspection during cleaning:

• Check fastening: Inspect whether all mechanical connection points are secure, whether there is any leakage in the hydraulic pipelines, and whether the operation is smooth.
• Check completeness: Check whether the small components such as screws, nuts, handles and oil cups are loose or missing. If necessary, tighten or replenish them immediately.
• Record keeping: Fill out shift records carefully hand over the equipment status and the problems clearly to ensure traceable equipment management.

steel tube mill

2. Lubrication Management: The “Circulatory System” of Equipment

Lubrication is essential to decreasing friction and preventing wear. The Erw Pipe Making Machine adopts various lubrication systems (Thin Oil Lubrication System and Grease Lubrication System)according to the working characteristics of each part.

（1）Thin Oil Lubrication System (Forming & Sizing Section):
This system consist of an oil tank, pump, pipes, and valves. It puts into operation independently from the main motor and typically starts when the oil temperature exceeds 40°C.

• Lubricant: Use No. 40 machine oil or gear oil; for the parts with oil cups, use No. 20 machine oil.
• Maintenance cycle: Check and refill once a month;change the oil thoroughly every six months (adjust on the basis of actual working conditions).

forming machine

（2）Grease Lubrication System:
It is mainly used for rolling bearings, screw-down spindles, and guide rails.

• Maintenance cycle: Add grease each shift to ensure adequate lubrication.

（3）Gearbox Lubrication:
Thin oil lubrication is adopted by the gearbox and maintenance focuses on the worm gear section.

1）Observe the oil level each shift.

2）Conduct a detailed inspection monthly.

3）Replace oil every six months.

bearing

 (4) Flying Saw Lubrication:
The spindle of the flying saw needs to be filled with high-speed lubricating grease that can withstand high temperatures

• Cycle: Add grease once every two days.
• Dosage: Two to three pumps each time.
• Warning: Over-lubrication can cause overheating, poor heat dissipation, and even bearing seizure.

flying saw

3. Wear Monitoring and Correction: Safeguarding Product Precision

When the finished tubes do not confirm dimensional or surface quality standards,A possible reason is that Wear of rollers and other parts have exceeded the standard.

Roll Grinding:
The rollers need to be ground in time to maintain accuracy. After grinding, the shim thickness must be increased to maintain the original rolling line height.

Calculation formula:Δ=1/2 × (Original Roll Diameter − Ground Roll Diameter)

Component Replacement:
If the production needs still cannot be met after grinding,, the roll must be replaced promptly.

4. Temperature Monitoring: The “Barometer” of Equipment Condition

During operation, the bearing housing temperature is a vital monitoring indicator.

• Standard limit: Surface temperature should not more than 60°C.
• Action: Operators should frequently check by touch or with a temperature gun.
  Once an abnormal increase in temperature is detected, the machine should be stopped immediately to investigate before resuming production.

5. Planned Maintenance: Systematic Prevention Over Reactive Repair

In addition to daily maintenance, scheduled inspections are crucial to prevent unexpected failures.

Maintenance schedule:

• Minor overhaul: Once every quarter
• Intermediate overhaul: Once every year
• Major overhaul: Once every two years
• The frequency can be adjusted based on operating intensity and production load.

Scope: Regularly replace aged seals and conduct a comprehensive inspection and repair transmission, hydraulic, and electrical control systems.

6. Additional Maintenance Considerations

• Coolant: Replace it on schedule and select the appropriate type for processing material. The coolant spray should be directed at the roll surface—not the bearings or electrical components.
• Workplace safety: Regularly inspect rain, wind, and fire protection systems to confirm a safe, ,which provides a guarantee for safe production.

Conclusion

The daily maintenance and care of Steel Tube Making Machine is a persistent process, which can transform passive “post-event repair” into proactive “preventive maintenance.”
By implementing these measures strictly, manufacturers can crucially decrease downtime, prolong equipment lifespan and stabilize product quality, which stand out in the market.