Plate rolling machines are essential industrial machines used for bending and rolling metal sheets into cylindrical or conical shapes. Whether you are investing in a new or used plate rolling machine, it is crucial to assess not only its technical specifications and operational capabilities but also its exterior condition. Additionally, proper lubrication and maintenance play a significant role in ensuring long-term performance and extending machine lifespan.
How to Identify a New vs. Used Plate Rolling Machine
When purchasing a plate rolling machine, one of the first things to look at—beyond technical parameters—is the physical appearance. The following aspects can help determine whether the machine is new, lightly used, or significantly worn and reassembled.
1. Paint Quality and Finish
A brand new one typically has a clean, well-finished paint job. Different colors on the machine body should have clear demarcations without any overlap or smudging. All non-machined metal surfaces should be evenly coated with paint.
2. Assembly Lines and Fasteners
Inspect the seams at assembly points. These should be neatly cut post-painting, without damaging the edges. Countersunk screws should sit flush with the surface, showing no eccentricity between the screw head and hole. Fixing pins may slightly protrude, while bolts should extend just beyond the nut surface.
The protruding shaft ends should be neatly finished, extending just beyond the end face of the covering part, typically by a chamfer value. If any of these seem irregular, this plate rolling machine may have been disassembled and reassembled—often a sign of age or reconditioning.
3. Piping and Wiring Layout
External pipelines for electrical, lubrication, or hydraulic systems should be arranged neatly and compactly. Pipe clamps should be used to secure the layout, with no visible twists or bends. Flexible hoses connected to moving parts should be kept as short as possible and must not rub against other components.
4. Surface Smoothness
Look at the surface finish of the entire body. A new plate rolling machine will have a smooth and consistent surface. Used machines, especially those in service for many years, often show signs of dents, pits, or unevenness—even if they’ve been repainted. These imperfections can reveal wear and previous overhauls.
5. Noise During Operation
Old or heavily used plate rolling machines generally generate louder operating noise due to worn internal parts or poor lubrication. If possible, request a trial run to listen for unusual sounds that may indicate internal damage or excessive wear.
Lubrication: The Key to Plate Rolling Machine Longevity
Once you have selected a plate rolling machine, whether new or used, the next critical step is establishing a proper maintenance schedule—especially focusing on lubrication. Lubrication is vital for minimizing wear and tear, reducing operational resistance, and ensuring smooth functioning of all moving parts.
How to Replace Plate Rolling Machine Lubricating Oil
To maintain optimal performance, it is essential to periodically change the lubricating oil. Here’s a step-by-step guide:
- Drain All Used Oil
Begin by completely draining the old oil from the system.
- Reinstall Drain Plug
Secure the drain plug once the oil has been drained to prevent leaks.
- Add Fresh Oil of the Same Grade
Never mix different brands or grades of lubricants. Always refill with the same specification recommended by the manufacturer.
- Match Oil Level to Installation Position
The oil level should correspond to the correct position as indicated on the machine.
- Check Oil Level at the Oil Plug
Use the oil level screw or plug to confirm the oil is filled to the right level.
- Tighten Oil Plug and Vent Cap
Ensure both the oil level screw and the breather cap are tightened to avoid contamination.
- Turn Off Power Before Working
Always cut the power and allow the gearbox to cool to a safe, warm temperature before replacing oil to prevent burns or electric shocks.
Common Lubrication Methods for Plate Rolling Machines
Depending on the component and its operating conditions, plate rolling machines use three primary lubrication methods:
- Oil Cup Lubrication
This is used for roller shaft journals and transmission shaft journals. It allows easy manual application via oil cups.
- Manual Lubrication
Parts like gears, worm gears, lifting screw rods, movable bearings, and tilt adjustment screws require scheduled manual oiling.
- Box Lubrication (Splash Lubrication)
The gearbox uses splash lubrication. As the gears rotate, oil is splashed to coat internal gears and bearings. This is a self-sustaining method but still requires periodic oil checks and replacement.
Tips for Better Maintenance
- Use High-Quality Lubricants
Always use recommended high-grade lubricants for your machine. Low-quality oil can cause clogging and wear over time.
- Regularly Inspect Lubrication Points
Create a maintenance schedule to check all lubrication points regularly—especially after heavy-duty cycles.
- Clean Old Oil Residue
Before refilling, clean the tank or housing to remove sludge or contaminants.
- Monitor for Oil Leaks
Small leaks can cause long-term damage. Address any seal or gasket issues promptly.
- Train Staff on Maintenance
Proper lubrication requires understanding. Train your operators and technicians to follow correct procedures.
Conclusion
Choosing the right plate rolling machine requires a keen eye for both technical and visual indicators of condition. Identifying whether a machine is new or used can save you from costly mistakes. At the same time, proper lubrication and regular maintenance are indispensable for ensuring your equipment operates efficiently and lasts longer.
Whether you’re a new buyer or a seasoned user, understanding these basic inspection and care techniques can help you protect your investment and keep your production line running smoothly.
