Ermaksan Green Press Brake Tandem 8200-320
The Ermaksan Green Press Brake Tandem 8200-320 is a high-tonnage tandem press brake system aimed at heavy plate forming applications such as ship hulls, structural beams, and large components for high-rise construction and heavy manufacturing.
Overview
- Designed for high-tonnage bending tasks in shipbuilding, heavy manufacturing, and structural steel fabrication.
- Tandem configuration allows coordinated operation of two press brakes for very long parts such as hull sections and long beams.
- Suited to heavy plate forming where high bending forces and long bend lengths are required.
- Commonly used on thick plate sections for ship hulls, stiffeners, and large structural members.
- Targets environments where precision, repeatability, and structural rigidity are critical under heavy loads.
Typical Cost Ranges
Pricing estimate (USD): $250,000 – $900,000 USD
- Lower end of the range typically corresponds to smaller capacity configurations and more basic control packages.
- Higher pricing usually reflects greater tonnage, longer tandem bed length, and advanced control/automation options.
- Installation, commissioning, and operator training can materially add to the total project cost beyond the base machine price.
- Tooling for heavy plate (punches, dies, special profiles) is usually costed separately and can be significant for large jobs.
- Ongoing costs include maintenance, hydraulic oil, potential energy consumption, and periodic calibration for accurate bending.
Specs That Matter
- Tonnage capacity: High-tonnage capability is essential for thick plate bending used in ship hulls and structural beams; confirm maximum press force per machine and in tandem operation.
- Bend length and tandem span: Overall usable bending length in tandem determines the maximum hull panel or beam length you can form in one piece.
- Frame rigidity and deflection control: For heavy plate forming, the machine’s frame stiffness and crowning/compensation systems are critical to maintain straight, consistent bends.
- Backgauge capability: Number of axes, stroke, and accuracy of the backgauge affect repeatability for long structural parts and complex bend sequences.
- Control system and synchronization: Tandem operation requires reliable electronic/hydraulic synchronization between the two brakes to keep parts straight along the full length.
- Open height, stroke, and throat depth: These dimensions govern the maximum part depth, flange heights, and tooling stack-ups you can accommodate for heavy sections.
- Energy efficiency and duty cycle: For high-volume shipbuilding and structural production, consider energy usage and whether the machine can sustain long production runs at high loads.
What to Inspect Before You Buy
- Verify the rated tonnage and bending length (per unit and in tandem) against your thickest plate and longest part requirements.
- Inspect the machine frame, side housings, and bed/ram surfaces for signs of distortion, cracking, or uneven wear from prior heavy-duty use.
- Check hydraulic system condition: look for leaks, listen for abnormal pump noise, and review any maintenance records for cylinder or valve work.
- Test ram parallelism and deflection under load with a test bend to confirm consistent angle along the full length, especially in tandem mode.
- Operate the CNC/control to ensure tandem synchronization functions correctly and that all safety interlocks and emergency stops work as intended.
- Inspect backgauge axes for smooth travel, backlash, and positional repeatability; confirm that gauge fingers are straight and securely mounted.
- Review included tooling for suitability with heavy plate forming, and check for cracks, excessive wear, or mismatched punch/die sets.
- Confirm availability of documentation: manuals, wiring/hydraulic diagrams, and any stored programs or bend libraries relevant to your parts.
- Assess electrical cabinet cleanliness and wiring condition, looking for non-factory modifications or heat damage from previous service.
- Discuss with the seller any known issues, prior repairs, and whether factory support, parts, and service are accessible in your region.
FAQ
What types of work is the Ermaksan Green Press Brake Tandem 8200-320 best suited for? It is aimed at high-tonnage bending tasks such as ship hull sections, structural beams, and heavy plate components for heavy manufacturing and high-rise construction.
Why choose a tandem press brake instead of a single machine? A tandem configuration allows two press brakes to work together, providing a much longer effective bending length for large panels and beams that cannot be formed on a single shorter machine.
How should I match tonnage capacity to my plate thickness? You should confirm the rated tonnage per meter (or per foot) of the machine and compare it with the bending force required for your thickest material and die opening, selecting a margin for safety and future needs.
Is this machine appropriate for lighter gauge work? While it can bend lighter materials, its strengths are in high-tonnage, heavy plate forming; for predominantly thin-gauge work, a smaller press brake may be more economical.
What controls are important for tandem operation? Reliable synchronization between the two machines, coordinated ram movement, and a control that can manage long-part bending sequences are key for accurate tandem operation.
How does frame rigidity affect bend quality? A rigid frame with effective deflection control helps maintain a consistent angle and straightness along the entire bend length, which is critical for ship hull panels and long structural members.
What should I look for when buying used? Focus on structural condition, hydraulic health, ram alignment, tandem synchronization performance, backgauge accuracy, and the completeness of documentation and tooling.
Can this type of press brake handle complex multi-bend parts? Yes, provided the backgauge system and control support the required number of axes and sequences, and the part geometry fits within the open height, stroke, and throat depth.
How significant are tooling costs for heavy plate forming? Tooling for thick plate can be a substantial portion of the total investment, especially when special punches and dies are needed for large radii or specific profiles.
What ongoing costs should I plan for? Expect periodic maintenance, hydraulic oil and filter changes, potential replacement of wear components, energy consumption during production, and eventual tooling refurbishment or replacement.
Source: Ermaksan Green Press Brake Tandem 8200-320
Ermaksan Green Press Brake Tandem 8200-320
