1250T Four Column Hydraulic Press for Deep Drawing Automotive Body Panels

Complete Technical Data

Capacity

• Nominal Force: 1250 Tons ($12,500\text{ kN}$) of primary downward pressing force to easily form high-strength steels and aluminum alloys.
• Hydraulic Cushion Force: 500–600 Tons of multi-point adjustable blank-holder force, critical for controlling metal flow on wide, complex panel geometries.

Structural Design

• Pre-Stressed Tie-Rod Pillar Design: Utilizes high-tensile four-pillar columns pre-tensioned to eliminate structural stretch and maintain absolute platen parallelism.
• Eight-Fold Slider Guidance: Incorporates extended, highly rigid slide guides to securely resist severe off-center loading during asymmetrical drawing cycles.

Frame Type

• Four-Column Monoblock/Tie-Rod Style: Combines the open 360-degree accessibility of a column press with the immense structural rigidity of heavy-plate welded steel constructions.
• Zero-Deflection Frame Geometry: Engineered using finite element analysis (FEA) to guarantee minimal frame deflection under maximum tonnage load.

Hydraulic System

• Closed-Loop Servo-Pump Drive: Integrates high-volume, variable displacement axial piston pumps driven by high-response servo motors.
• Multi-Channel Cushion Control: Features independent pressure control across different zones of the hydraulic cushion to dynamically adjust localized blank-holder forces.

Main Ram Stroke

• Maximum Travel: Long stroke capability (typically 1000mm–1400mm) to allow deep, complex draws and easy automated part transfer.
• Absolute Precision Feedback: High-speed linear encoders provide continuous sub-millimeter stroke positioning accurate to $\pm0.03\text{mm}$.

Working Hydraulic Pressure

• Max System Pressure: Rated at 25–31.5 MPa ($250\text{--}315\text{ bar}$) for high-density power delivery with minimal footprint size.
• Real-Time Pressure Profiling: Proportional pressure relief valves dynamically scale hydraulic tonnage based on the draw depth.

Daylight Gap

• Maximum Open Height: Generous vertical opening (typically 1500mm–2000mm) allowing for deep punch tools, lower cushion pins, and large automotive dies.
• Shut Height Range: Broadly adjustable to accommodate a wide variety of thin-profile stamping or deep-draw tooling assemblies.

Approach Speed

• Rapid Downward Motion: High-speed approach up to 200–250 mm/s to sharply minimize dry-cycle times and increase overall factory throughput.
• Proportional Deceleration Phase: Seamless deceleration curves gently transition the slide from high-speed travel to drawing velocity just before die contact.

Pressing / Drawing Speed

• Variable Draw Velocity: Smoothly adjustable forming speed (typically 3–15 mm/s) designed to prevent material tearing in Class-A aluminum and steel.
• Synchronized Cushion Speed: The cushion recedes in absolute synchronization with the drawing punch to maintain consistent material thickness.

Return Speed

• Rapid Retract Velocity: High-speed upward stroke reaching 150–200 mm/s to quickly clear the die area for automated transfer systems.
• Advanced Decompression Logic: Multi-stage decompression valves release high cylinder pressures smoothly, eliminating hydraulic shock and piping wear.

Bed / Platen Size

• Extra-Large Bolster Area: Massive working table dimensions (e.g., $2500\text{mm} \times 1600\text{mm}$ up to $3000\text{mm} \times 2000\text{mm}$) sized for large hoods, doors, and side-panel dies.
• Standard T-Slots & Cushion Pin Pattern: Features standardized DIN/JIS T-slots and a dense matrix of cushion pin holes for modular tooling setup.

Columns

• Heavy Forged Alloy Pillars: Hard-chrome plated, induction-hardened alloy steel columns resistant to continuous friction and high mechanical stress.
• Automated Tension Monitoring: Column nut loads are monitored to ensure structural alignment and equal distribution of stress during heavy draws.

Working Envelope

• Wide Spatial Clearance: Maximized clearance between pillars enables rapid front-to-back or side-to-side loading of large sheet metal blanks.
• Integrated Die Change Rails: Bed equipped with hydraulic die lifters and roll-out bolster rails for rapid, automated mold changeovers.

Control System

• High-Performance PLC System: Centralized control via premium industrial PLCs (e.g., Siemens S7-1500 or Beckhoff) executing real-time bus communication.
• Automotive-Grade HMI Panel: Advanced multi-touch workstation featuring graphic pressure curves, die parameter storage, and detailed fault diagnostics.

Main Motor Power

• High-Efficiency Power Pack: Multi-motor high-horsepower configuration (typically 90kW–150kW) engineered for rigorous, continuous three-shift operations.
• Servo Energy Saver: Intelligent power management drops power consumption during loading, unloading, and idling, saving up to 50% on utility costs.

Valves & Hydraulics

• Two-Way Cartridge Manifold Blocks: Integrated cartridge manifolds optimize oil flow paths, drastically reduce response times, and prevent external leakage.
• Premium Hydraulic Brands: Exclusively uses world-class valves and seals (such as Rexroth, Parker, or Eaton) to meet strict global automotive standards.

Automation

• Interpress Transfer & Robot Ready: Pre-configured I/O ports and Profinet interfaces for seamless integration with high-speed linear feeders and robotic lines.
• Quick Die Change (QDC) Interface: Automated control outputs for clamping, die-lifting, and moving bolsters to enable single-minute die changes.

Safety Features

• Category 4 Safety Light Barriers: High-resolution optical guards protect the front and back operating areas, halting all slide movements if breached.
• Dual-Channel Hydraulic Monitored Valves: Redundant safety valves prevent accidental ram movement, backed by a mechanical slide lock bar.
• Overload Protection Valve: Instantaneous hydraulic relief system halts operation if die pressure exceeds rated tonnage, protecting both die and press.

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