When transitioning from simple plate leveling to actual deep drawing, a fixed worktable is no longer enough. The deciding factor is blank holding force. Without precise counter-pressure, large sheets will wrinkle at the corners or thin out unevenly along the draw wall. This 400-ton four-column press solves that by integrating a dedicated 100-ton hydraulic cushion beneath a spacious 1600 x 1600 mm worktable. It allows your shop to switch between deep drawing, press fitting, and leveling on the same machine, without mechanical changeovers.
Key Engineering Features
Spacious 1600 x 1600 mm Worktable: The distance between columns is 1600 mm, providing ample space for wider blanks. Operators can load larger sheet sections in a single cycle without constant repositioning, which is critical for maintaining throughput in medium-to-high volume runs.
Optimized Daylight and Stroke: With a 1300 mm opening height (daylight) and a 900 mm main ram stroke, this frame accommodates taller, multi-stage dies without requiring a larger, more expensive machine footprint. The stroke length ensures sufficient travel for deep draw operations while maintaining structural rigidity.
100-Ton Independent Hydraulic Cushion: Unlike fixed-pressure systems, the integrated cushion cylinder operates on an independent circuit. It features 12 ejector pins arranged in a rectangular distribution. This specific layout ensures uniform force distribution across the large 1600x1600mm table, preventing localized deflection and ensuring the blank feeds into the die evenly. Operators can dial in the exact counter-pressure needed for the material thickness, or disengage it entirely for straightforward leveling tasks.
Real-World Application Scenarios
1. Automotive Bracket Deep Drawing: When forming a 1.5mm thick low-carbon steel automotive bracket, a standard fixed-table press often causes corner wrinkling due to uneven material flow. With this 400-ton press, the operator engages the 100-ton hydraulic cushion. The 12-pin rectangular distribution applies uniform upward counter-pressure, holding the blank firmly against the die face. The result is a smooth, tear-free draw with consistent wall thickness, eliminating the need for secondary trimming or costly rework.
2. Heavy Shaft Press Fitting & Plate Leveling: For assembly tasks like pressing large bearings onto shafts or leveling welded steel frames, the hydraulic cushion is simply disengaged. The 400-ton main ram delivers full, steady force across the 1600 x 1600 mm worktable without the rebound or shock typical of mechanical presses. This ensures a smooth, controlled press-fit that prevents surface damage to precision components, while the four-column guidance prevents any ram tilt under off-center loads.
Core Component Transparency
We believe buyers should know exactly what is inside the machine. This 400-ton press is built with proven, serviceable components:
- Hydraulic Pump: HY80Y model, selected for stable flow and durability under continuous cycling.
- Valve Group: 315HGCV cartridge valve system, ensuring precise pressure control and minimal leakage.
- Main Cylinder: Heavy-duty construction with an outer diameter of 450 mm and an inner bore of 420 mm, designed to handle the full 400-ton rated capacity without wall stress.
- Cushion Cylinder: Outer diameter 220 mm, inner bore 150 mm, delivering the full 100-ton counter-force with a 400 mm stroke.
Manufacturing & Support Commitment
- Quality Assurance: Manufactured under strict ISO 9001 quality management systems, ensuring consistent precision, rigorous factory testing, and reliable performance.
- Standard Lead Time: Standard configurations are typically ready for factory acceptance testing and shipment within 60 days of order confirmation.
- Warranty Coverage: We stand behind our build quality with a 1-year comprehensive warranty on the hydraulic system (including pumps, valves, and cylinders), backed by lifetime technical support and readily available spare parts.
- Customization: For facilities requiring specific global brands (e.g., Rexroth valves or Siemens PLCs) or modified table dimensions, custom upgrades are available upon request.
Technical Specifications
| Parameter | Value |
|---|---|
| Nominal Force (Main Cylinder) | 400 Ton (4000 kN) |
| Cushion Force (Lower Cylinder) | 100 Ton (1000 kN) |
| Worktable Effective Area | 1600 x 1600 mm |
| Distance Between Columns | 1600 mm |
| Max. Opening Height (Daylight) | 1300 mm |
| Main Ram Stroke | 900 mm |
| Cushion Stroke | 400 mm |
| Cushion Ejector Pins | 12 pins (Rectangular distribution) |
| Motor Power | 18.5 kW (380V, 50Hz) |
| Hydraulic Pump Model | HY80Y |
| Valve Group Model | 315HGCV |
| Machine Weight (Approx.) | 16.5+ Tons |
| Primary Applications | Deep drawing, plate leveling, press fitting, metal forming |
Frequently Asked Questions (FAQ)
Why choose this four-column press over a C-frame press for deep drawing?
For light-duty work under 50 tons, a C-Frame Hydraulic Press offers lower cost and open-front access. However, at 400 tons with a 1600 mm table width, a C-frame is highly susceptible to angular deflection (often called “yawning”) under off-center loads. This four-column design guides the ram on four hardened posts, maintaining strict parallelism across the entire 900mm stroke. This rigidity is non-negotiable for consistent deep drawing quality, preventing die damage and extending tool life.
How does the 100-ton cushion force affect deep drawing quality on this machine?
The 100-ton cushion provides the necessary blank holder force to keep the sheet metal flat against the die face as the main ram pushes down. If the force is too low, the material will wrinkle. If it is too high, the sheet may tear along the draw wall. Because this cushion is on an independent circuit with a 400mm stroke, your operators can adjust the pressure precisely for different material thicknesses, or turn it off completely for simple pressing or leveling jobs.
Why are there 12 ejector pins in a rectangular distribution?
On a large 1600 x 1600 mm worktable, a single central ejector pin would cause the blank to tilt or deform unevenly. The 12-pin rectangular layout ensures that the counter-pressure is distributed uniformly across the entire die area. This is a critical design feature for maintaining part consistency in deep drawing applications.
Can this press handle off-center loading without ram tilt?
The four-column guide system is specifically designed to resist off-center loading far better than a two-post design. However, as a best practice for any heavy-duty press, we recommend centering the tooling as closely to the middle of the 1600x1600mm table as possible. This minimizes uneven wear on the guide bushes and extends the overall service life of the machine.
Do you offer customization for specific die sizes or automation?
Yes. While the 1600 x 1600 mm table and 100-ton cushion are our standard high-volume configuration, our manufacturing facility regularly customizes worktable dimensions, stroke lengths, and control systems (such as adding light curtains or servo-hydraulic upgrades) to match specific production lines. You can discuss your drawing requirements with our engineering team.
Not sure if 400 tons is the right capacity for your part?
Choosing the wrong cushion pressure or table size can lead to scrapped parts and wasted capital. Our application engineers can review your part drawings and provide a free pressing force calculation and tooling recommendation within 24 hours.
Standard lead time: 60 days. 1-year hydraulic system warranty included.
