02 — Technical Specifications
Complete Technical Data
The SM 1250 HP is an ultra-heavy-duty 1250-ton hydraulic press engineered specifically for the demanding deep-drawing process of high-pressure seamless gas cylinders. It integrates massive pressing force with precision stroke control to ensure uniform wall thickness and defect-free elongation of thick steel blanks.
Capacity
- Maximum Main Pressing Force: 1250 Tons (12500 kN)
- Die Cushion / Ejector Force: 300 - 400 Tons (Critical for stripping and holding heavy preforms)
Structural Design
- Ultra-rigid, heavily reinforced welded steel plate construction, ultrasonically tested for structural integrity
- Thermally stress-relieved to withstand continuous extreme high-tonnage fatigue without deflection
Frame Type
- Heavy-duty 4-Pillar (Column) configuration
- Features extra-long precision bronze or self-lubricating guides to handle the long-stroke requirements of cylinder drawing
Hydraulic System
- High-flow, servo-hydraulic or advanced proportional logic valve manifold system
- Equipped with a high-capacity continuous oil cooling and offline micro-filtration system for heavy industrial cycling
Main Ram Stroke: 1500 mm to 2000 mm (Extended stroke necessary for deep elongation of gas cylinders, adjustable via linear transducers)
Working Hydraulic Pressure: Maximum Operating Pressure: 250 - 280 Bar (25 - 28 MPa)
Daylight Gap: Maximum Open Height (Bolster plate to ram): 2500 mm to 3000 mm (Accommodates tall tooling and final cylinder length)
Approach Speed: Rapid descent speed for cycle optimization: ~200 - 250 mm/sec
Pressing / Drawing Speed: Highly controlled, variable drawing speed: 8 - 15 mm/sec (Optimized to prevent tearing in thick-walled high-strength steel)
Return Speed: Fast retract speed: ~180 - 200 mm/sec
Bed / Platen Size Platen
- Dimensions: ~1500 mm x 1500 mm (Designed specifically for deep draw die configurations)
- Precision machined with standard T-slots for secure, heavy die clamping
Columns
- Solid forged steel (EN-8/EN-9 or equivalent), hard-chrome plated and precision ground
- Massive diameter: ~350 mm to 400 mm to resist lateral forces during deep drawing
Working Envelope
- Front Opening: ~1600 mm for robust material handling and overhead crane access
- Side Opening: ~1600 mm for maintenance and automated extraction systems
Control System
- Advanced Industrial PLC (e.g., Siemens or Allen-Bradley)
- Large HMI Touch Panel for precise stroke profiling, pressure setting recipes, and real-time diagnostics
Main Motor Power: 120 kW to 150 kW (Multiple high-efficiency IE3 induction motors driving dual or triple pump groups)
Valves & Hydraulics
- Premium proportional directional and pressure control valves (e.g., Rexroth, Parker)
- Integrated pre-fill valves for rapid ram gravity descent
Automation
- Fully integrated interfaces for robotic blank feeding, transfer systems, and automated cylinder extraction
- Centralized automatic lubrication system for continuous 24/7 operations
Safety Features
- Heavy-duty front and rear photoelectric light curtains
- Mechanical ram safety locking mechanism (anti-fall blocks) for safe die maintenance
- Dual-palm, anti-tiedown operation buttons and multiple strategically placed Emergency Stop buttons
SM 1250 HP — Model Specifications
- Nominal Force: 12500 KN
- Maximum Hydraulic Pressure: 25 MPa
- Max Opening Height of the Slider: 1500 mm
- Max Stroke of the Slider: 900 mm
- Effective Bed Size: 1600 × 1600 mm
- Slider Down Speed: 180 mm/s
- Slider Pressing Speed: 6–15 mm/s
- Slider Return Speed: 200 mm/s
- Ejector Cylinder Nominal Force: 600 KN
- Stroke of the Ejection Cylinder: 300 mm
