The Durma HRB 2008 4 rolls hydraulic plate rolling machine is a used metalworking solution for fabricators who need reliable cold-rolling capacity. This equipment is positioned at the intersection of workshop practicality and production efficiency.
Used in structural, automotive, and custom fabrication environments, the HRB 2008 balances footprint, power, and rolling precision. The following sections highlight key specifications, operational characteristics, and maintenance considerations.
| Model | Year | Roller Diameter (mm) | Max Plate Thickness (mm) | Min Plate Width (mm) | Max Plate Width (mm) |
|---|---|---|---|---|---|
| Durma HRB 2008 | 2008 | 200 | 20 | 1,000 | 2,000 |
| Roller Configuration | 4 Roll Hydraulic | Pre-bending | Double pre-bending + straightening | Hydraulic drive | Adjustable lower rolls |
| Hydraulic System | Oil-based | Pressure Range | Up to 25 MPa | Power Supply | 3-phase, 50/60 Hz |
Operational Mechanics of the HRB 2008
The Durma HRB 2008 employs a four-roll hydraulic design where the upper roll moves vertically for pressure application. Side rolls adjust vertically and horizontally to control crown and taper. This configuration delivers consistent curvature from plate edges to center.
Hydraulic cylinders manage roll positioning, enabling both pre-bending and straightening in one setup. Operators can fine-tune roll speed and pressure to match material grade and thickness variations without manual recalibration.
Key Specifications and Limits
Understanding technical limits helps match the Durma HRB 2008 to production requirements. Diameter, power load, and roll gap define what plate sizes can be processed safely.
Roll diameter and hydraulic pressure determine forming force. Below are the core specifications that influence machine selection and daily workflow.
Specification Highlights
| Parameter | Value | Notes |
|---|---|---|
| Roller Diameter | 200 mm | Provides leverage for mid-range thickness plates |
| Max Plate Thickness | 20 mm | Steel at room temperature |
| Max Plate Width | 2,000 mm | Limited by roll length and frame stiffness |
| Min Plate Width | 1,000 mm | Ensures stable feed and exit handling |
| Hydraulic Pressure | Up to 25 MPa | Influences bend radius and springback control |
Maintenance and Longevity of Used Equipment
Regular attention to hydraulic oil cleanliness, roll alignment, and structural wear extends the service life of the Durma HRB 2008. Preventive checks reduce unplanned downtime and maintain forming accuracy.
Inspect roll bearings, seal conditions, and cylinder rods during scheduled maintenance. Addressing minor issues early helps preserve machine geometry and keeps rework rates low.
Workflow Integration and Safety
Positioning the HRB 2008 within a production cell requires clear access for loading and unloading. Ensure adequate space for roll changes and operator movement, and verify that lifting points match workshop cranes.
Safety features such as emergency stops, guarding around rotating elements, and pressure relief valves should be tested periodically. Documenting lockout/tagout procedures supports compliance and operator confidence.
Summary of Key Takeaways
- Verify plate thickness and width ranges match your production mix.
- Schedule routine hydraulic system checks to preserve forming accuracy.
- Use roll geometry inspection to maintain consistent bend quality.
- Align handling equipment and workspace layout for smooth workflow.
- Adjust operating parameters for different alloys to control springback.
FAQ
Reader questions
What is the Durma HRB 2008 suitable for in a fabrication shop?
The Durma HRB 2008 is suitable for bending steel plates up to 20 mm thick with widths between 1,000 and 2,000 mm. It serves shops needing consistent cylindrical or conical shapes in structural, machinery, or transport components.
How does the 4 roll hydraulic design improve forming quality compared to 3 roll machines?
The extra roll enables pre-bending at both edges while maintaining straight sections, reducing end defects and minimizing manual prep. This results in tighter radius control and less rework on thicker plates.
What maintenance intervals are recommended for the hydraulic system?
Regular checks of oil cleanliness, filter replacement, and cylinder rod inspection every few months help maintain stable pressure and reduce wear. Following the original service schedule keeps performance predictable.
Can this machine handle materials other than carbon steel?
Yes, it can process stainless and aluminum plates within the thickness and width limits, provided roll tooling and bending parameters are adjusted. Material hardness and ductility influence springback and required force.