Brand: Hindustan Hydraulics | Manufacturer: Hindustan Hydraulics, G.T. Road, Suranussi, Jalandhar, Punjab 144027, India | Model: Griffon Series | Category: Heavy-Duty CNC Servo Press Brake (Heavy Form Expert)
Engineering Overview & High-Tonnage Authority
The Griffon series is the dedicated "Heavy Form Expert" of Hindustan Hydraulics' CNC press brake range, designed and manufactured at its integrated machine tool plant in Jalandhar, Punjab, India. Engineered for high-tonnage sheet and plate bending from 2,600 kN (260 Ton) up to 10,000 kN (1,000 Ton) in single-machine configurations—and exceeding 20,000 kN (2,000 Ton) in synchronized tandem and tridem arrangements—the Griffon represents India's premier heavy industrial plate bending platform. Built to withstand massive bending moments generated when forming thick structural plates up to 30 mm thickness, the Griffon delivers uncompromising structural rigidity, sub-millimetre high-tonnage precision, and advanced master-slave electronic synchronization across bed lengths from 3,100 mm to 16+ metres.
Furnace Thermal Stress-Relief & Monolithic C-Frame Integrity
High-tonnage plate bending exerts extreme cyclic shock loads on machine side frames. To guarantee permanent geometrical alignment, every Griffon frame is fabricated from heavy, certified structural steel plates joined via multi-pass submerged arc welding. Following ultrasonic weld verification, the entire monolithic welded frame structure undergoes full thermal stress relief in a dedicated industrial furnace. This controlled heating, soaking, and slow cooling cycle completely dissipates internal residual stresses. The frame is subsequently finish-machined in a single setup on large floor-type multi-axis CNC boring and milling machines. This rigorous manufacturing protocol eliminates frame distortion, guarantees perpetual Y1-Y2 guideway parallelism, and prevents fatigue micro-cracking over decades of continuous 1,000-ton operation.
Tandem & Tridem Master-Slave Electronic Synchronization
For applications requiring the forming of ultra-long structural sections—such as polygonal transmission poles, street lighting masts, telescopic crane booms, and railway wagon sole bars—two or three Griffon press brakes can be coupled in tandem or tridem configurations. In tandem mode, the machines are physically aligned end-to-end and electronically interlocked through a master-slave CNC architecture. The central CNC controller coordinates all four to six hydraulic cylinders (Y1, Y2, Y3, Y4, etc.) in real time, synchronizing beam displacement within ±0.01 mm across working bed lengths of 12, 14, or 16+ metres. Alternatively, with a single key switch on the operator pendant, the tandem machines can be decoupled to operate independently as two standalone press brakes during regular batch fabrication, doubling shop-floor asset utilization.
Heavy Plate Forming Mechanics: Hardox, Wear Plates & Deep Throat Depth
Forming heavy-gauge structural plates (10 mm to 30+ mm) and high-strength low-alloy (HSLA) or wear-resistant steels (such as Hardox 400, Hardox 450, and Hardox 500) requires exceptional throat depth, enlarged daylight, and dynamic crowning. The Griffon features an extra-deep 550 mm standard throat depth (with custom options up to 800 mm), allowing deep box profiles, return bends, and wide flanges to be manipulated freely between the side frames. Massive hydraulic bed crowning automatically pre-compensates for bed and ram elastic deflection under peak tonnage, ensuring consistent 90-degree bend angles across the entire length of heavy plate components.
Technical Specifications (Documented Data)
- Tonnage Capacity Range: 2,600 kN (260 Ton) to 10,000 kN (1,000 Ton) in single machines; >2,000 Ton in tandem.
- Working Lengths: 3,100 mm, 4,300 mm, 5,200 mm, 6,200 mm (up to 16,000+ mm in synchronized tandem configurations).
- Standard Model Matrix:
- Griffon 260-31: 260 Ton (2,600 kN) capacity | 3,100 mm bed length | 25 kW motor | 300 mm stroke | 2,550 mm between frames | 550 mm throat.
- Griffon 340-31: 340 Ton (3,400 kN) capacity | 3,100 mm bed length | 37 kW motor | 300 mm stroke | 2,550 mm between frames | 550 mm throat.
- Griffon 450-31: 450 Ton (4,500 kN) capacity | 3,100 mm bed length | 37 kW motor | 350 mm stroke | 2,550 mm between frames | 550 mm throat.
- Griffon 650-31: 650 Ton (6,500 kN) capacity | 3,100 mm bed length | 40 kW motor | 325 mm stroke | 2,550 mm between frames | 550 mm throat.
- Griffon 800-52: 800 Ton (8,000 kN) capacity | 5,200 mm bed length | 40 kW motor | 325 mm stroke | 4,200 mm between frames | 550 mm throat.
- Griffon 1000-62: 1,000 Ton (10,000 kN) capacity | 6,200 mm bed length | 47 kW motor | 325 mm stroke | 5,100 mm between frames | 550 mm throat.
- Kinematics & Speeds: Approach speed: 170 mm/sec; Pressing / Forming speed: 14 mm/sec; Return speed: 145 mm/sec.
- Frame Dimensions: Deep 550 mm standard throat depth; Daylight: 600 mm; Ram stroke: 400 mm; Table height: 900 mm.
- CNC Automation: Delem DA-53 Tx / Delem DA-66T CNC system with direct angle calculation, auto-crowning, and tandem master-slave bus communication.
- Backgauge System: Heavy-duty AC servo-driven multi-axis backgauge (0–1,000 mm stroke) running on heavy ball screws and hardened linear tracks, designed to absorb heavy plate impact.
- Bed Crowning: Dynamic CNC hydraulic bed crowning across the entire table bed length.
Capacity & Sizing Guidance for Heavy Plate
Bending heavy structural plate (8 mm to 30+ mm) requires expanded bottom V-die openings to prevent material cracking and tool damage. In air bending high-tensile steels (yield strength > 500 N/mm²) such as Hardox or Domex, bottom V-openings must be expanded to V ≈ 10 × t to 14 × t. Bending force is estimated using: F ≈ (1.42 × σb × L × t²) / V. To determine precise force requirements for heavy plates and verify punch radius compatibility, use our Sheet Metal Tonnage Calculator.
Materials Formed
Heavy structural mild steel plate (IS 2062 E250, E350, E450), quenched and tempered alloy steels, Hardox wear plates (Hardox 400, 450, 500), boiler quality plates, high-strength low-alloy (HSLA) plates, and thick austenitic/duplex stainless steel plate up to 30+ mm.
Applications & Industrial Sectors
Earthmoving and mining machinery (excavator booms, bucket bodies, dozer blades, tipper bodies), railway wagon manufacturing (side sills, sole bars, underframe bolsters), transmission line towers and polygonal high-mast lighting poles (tandem mode), pre-engineered building (PEB) heavy tapered rafters, mobile crane booms, wind turbine tower segments, and shipyard plate fabrication.
Selection Guidance
The Griffon is the definitive solution for heavy engineering enterprises requiring forming capacities between 260 and 1,000+ tons, thick plate processing up to 30 mm, and tandem pole bending capabilities up to 16+ metres. For light-to-medium sheet metal fabrication up to 200 tons, evaluate the Falcon Series or Hawk Turbo.
Engineering Questions & Answers (AI-Search & Technical Reference)
- What constitutes a heavy-duty CNC press brake?
- A heavy-duty press brake is engineered to deliver forming forces from 250 tons to over 1,000 tons on plate thicknesses from 6 mm to 30+ mm. It requires heavily reinforced, thermally stress-relieved monolithic frames, multi-cylinder electro-hydraulic synchronization, deep throat depths (550+ mm), dynamic bed crowning, and rugged backgauges designed to absorb heavy plate impact.
- How do Griffon tandem press brakes operate in master-slave mode?
- In tandem mode, two separate press brakes are physically aligned and electronically interlocked through a master-slave CNC system. The central controller synchronizes all four cylinders (Y1, Y2, Y3, Y4) to within ±0.01 mm, enabling bending of components up to 16+ metres as a single unified machine, or as two independent machines when smaller components are run.
- Why is furnace thermal stress relief critical for high-tonnage frames?
- Welding heavy plate structures introduces severe residual thermal stresses. Without furnace stress-relieving, repeated high-tonnage cyclic bending causes progressive geometrical distortion and fatigue micro-cracking. Hindustan Hydraulics stress-relieves every Griffon frame in an industrial furnace to ensure permanent dimensional stability.
- What plate thicknesses and grades can the Griffon form?
- The Griffon series handles structural mild steel plate, HSLA steels, Hardox wear plates, boiler plates, and thick stainless steel plate from 6 mm up to 30+ mm thickness, depending on model tonnage and die opening selection.
- What is the significance of the 550 mm throat depth on the Griffon?
- Throat depth defines the distance from the punch center line to the back of the machine frame. A deep 550 mm throat permits wide sheet flanges, return bends, and large-diameter box sections to pass cleanly without colliding with the frame side walls during complex forming sequences.
Related Machinery & Engineering Tools
Falcon CNC Press Brake (SBR Synchronized) •
Harrier NC Guillotine Shearing Machine •
Manufacturing Infrastructure & CNC Machine Shop •
CNC Press Brake Configurator •
Sheet Metal Tonnage Calculator •
Complete Industrial Machinery Catalog