The 76 Unit Dual Station Hydraulic Expansion and Contraction Unwinding Machine is a critical high-performance component designed for precision feeding in welded pipe production lines. By utilizing an advanced hydraulic system to lift and secure steel coils, this equipment ensures maximum stability and safety during high-speed feeding and storage operations, significantly reducing industrial noise and operational labor intensity.
Engineered for maximum efficiency, the dual-station design allows for seamless material preparation; while one station is actively feeding the production line, the other can be pre-loaded with the next coil. This eliminates the downtime associated with traditional single-station loading, transforming a traditionally strenuous manual process into a streamlined, semi-automatic mechanical operation that enhances overall plant productivity.
Detailed Parameters
| Expansion Range | 430-530mm (100mm stroke) | Strip Width | 60-250mm |
|---|---|---|---|
| Center Height | 1150mm | Shaft Diameter | ￠150mm (Inner hole ￠65) |
| Shaft Material | 42CrMo Spring Steel | Front Bearing | Self-aligning roller bearing 23130 |
| Rear Bearing | 352026 Bearing | Expansion Cylinder | 140/60 105 Long rod cylinder |
| Hydraulic Motor | 1 BM3-500 J shaft (Reversing/Regulating) | System Power | 7.5kw Motor / Vane Pump (Disp. 25) |
Key Advantages
Enhanced Safety
Hydraulic expansion and contraction ensure the steel coil is locked rigidly, preventing slippage during high-speed rotation.
Zero Downtime
Dual-station configuration allows pre-clamping of raw materials, eliminating "one material, one loading" wait times.
Premium Durability
Utilizes 42CrMo spring steel for shafts, offering superior toughness, hardenability, and long-term wear resistance.
Smart Feeding
Hydraulic cylinder-driven motors automate the material head lead-out, drastically reducing manual labor intensity.
Precision Control
Integrated hydraulic advance/retreat blocking devices prevent material rolls from loosening during operation.
Low Maintenance
Simplified mechanical structure combined with high-grade bearings ensures a low failure rate and easy servicing.
Product Gallery
Management Platforms
Coil Logistics
Streamlined handling of heavy raw materials using hydraulic lifting and positioning.
Cycle Optimization
Reduction of material changeover time through dual-station pre-loading.
Safety Monitoring
Electric-hydraulic braking systems ensure immediate stops and secure material clamping.
Noise Control
Hydraulic drive systems minimize mechanical friction and operational noise levels.
Material Versatility
Adjustable apertures via shims to accommodate various large-aperture raw materials.
Load Balancing
Self-aligning roller bearings ensure smooth rotation even under maximum coil weight.
Investment Return Comparison
| Metric | Single Station Machine | Dual Station Hydraulic Machine |
|---|---|---|
| Loading Downtime | High (Stop for every coil) | Near Zero (Pre-loaded) |
| Labor Intensity | Manual / Heavy | Semi-Automatic / Light |
| Safety Risk | Moderate (Manual clamping) | Low (Hydraulic locking) |
| Production Speed | Standard | High-Speed Optimized |
| Operational Cost | Higher (Labor hours) | Lower (Efficiency gains) |
Frequently Asked Questions
The primary benefit is the elimination of loading downtime. One station can be prepared with a new coil while the other is feeding the line, ensuring continuous production and significantly reducing worker fatigue.
42CrMo is a high-strength alloy spring steel known for its excellent hardenability, toughness, and fatigue resistance, which is essential for supporting the massive weight of steel coils during high-speed rotation.
The system uses hydraulic cylinders to drive sliding blocks and sleeves, expanding the shaft diameter to fit the inner hole of the coil tightly, ensuring a secure, slip-free grip during the unwinding process.
Yes, while the standard expansion range is 430-530mm, the machine is designed to accommodate larger aperture raw materials through the addition of precision shims.
The equipment is equipped with a specialized hydraulic advance and retreat blocking device on the working side, which locks the material in place to prevent unplanned loosening.
The hydraulic station is powered by a 7.5kw motor equipped with a vane pump (displacement 25), which provides the necessary pressure for rotation, expansion, and positioning.
