Dual‑Line Cold Drawing Machine for Aluminum Bars & Tubes – Double Output with Micron‑Level Precision
- May 29
- 3 min read
Twin‑line hydraulic drawbench independently processes aluminum rods, bars, and tubes simultaneously – maximizing productivity for EV battery cooling tubes, aerospace structural bars, and high‑volume aluminum profiles.
Why Dual‑Line Drawing for Aluminum?
Aluminum cold drawing demands smooth, vibration‑free force to preserve surface finish and achieve tight tolerances. When production volumes grow, adding a second separate drawbench doubles floor space, capital cost, and labor. The dual‑line cold drawing machine for aluminum bars and tubes solves this by integrating two fully independent drawing lines into a single, compact frame.
Advantage | Dual‑Line Machine | Two Separate Machines |
Floor space | 1 unit (∼40% less) | 2 units |
Capital cost | ∼30% less than two singles | 100% + 100% |
Operator | One for both lines | Typically two |
Energy | Shared hydraulic unit | Two power units |
Maintenance | Single control system | Duplicated components |
Key Technical Specifications
Parameter | Per Line | Dual‑Line Total |
Drawing force | 10 – 30 tons | 20 – 60 tons |
Aluminum bar diameter | 5 – 60 mm | Same both lines |
Aluminum tube OD | 6 – 80 mm | Same or different |
Tube wall thickness | 0.5 – 8 mm | Independent per line |
Drawing length | Up to 12 m (17 m optional) | – |
Drawing speed | 0 – 20 m/min (independent) | – |
Dimensional accuracy | ±0.02 mm | – |
Independent Line Control – Maximum Flexibility
Each line operates autonomously:
Different materials – Line 1 draws 6061‑T6 bars; Line 2 draws 3003 tubes.
Different sizes – 20 mm OD tube on Line 1, 40 mm OD tube on Line 2.
Independent start/stop – Change tooling on one line while the other continues production.
Materials & Applications
Product | Alloys | Typical Use |
Aluminum round bars | 6061, 7075, 2024 | Aerospace shafts, CNC feed stock |
Aluminum tubes | 3003, 6061, 6063 | EV battery cooling, HVAC, hydraulic lines |
Aluminum hexagonal bars | 6061, 6063 | Precision machined fittings, fasteners |
Aluminum flat bars | 6061, 6101 | Busbars, electrical conductors |
Core Technologies for Aluminum‑Specific Drawing
Smooth hydraulic drive – Vibration‑free force eliminates chatter marks on soft aluminum.
DLC‑coated / polished carbide dies – Prevents galling (aluminum adhesion) for flawless ID/OD finish.
Closed‑loop thickness control – Real‑time adjustment maintains ±0.02 mm wall uniformity.
Gentle gripping system – Padded jaws protect surface finish during drawing.
Quick‑change die holders – Switch sizes in under 10 minutes per line.
Space & Efficiency Comparison
Configuration | Floor Space (approx.) | Output (same product) | Labor |
Single‑line drawbench ×2 | 40 m² | 200% | 2 operators |
Dual‑line drawbench | 24 m² | 200% | 1 operator |
Savings | 40% less space | – | 50% labor |
How the Dual‑Line System Works for Aluminum
Dual automatic pointers – Prepare ends for both lines simultaneously (optional dual‑head hydraulic pointer).
Independent infeed magazines – Load bars/tubes into each line; auto‑singulation.
Simultaneous drawing – Both lines draw at independent speeds; shared hydraulic power unit but separate control valves.
Separate discharge – Straightened products exit to individual stackers or merge for common downstream processing.
Real‑World Productivity Example
A manufacturer of EV battery cooling tubes (6061, 16 mm OD × 1.0 mm wall) and aerospace structural bars (7075, 25 mm diameter) previously ran two single‑line drawbenches using 42 m² of floor space and two operators per shift. After installing a FangRong dual‑line aluminum drawbench, they:
Reduced floor space to 25 m² (40% saving)
Cut labor to one operator per shift
Maintained ±0.015 mm accuracy on both products
Increased OEE by eliminating changeover conflicts (independent lines run different jobs simultaneously)
Why Choose FangRong for Dual‑Line Aluminum Drawing?
20+ years in aluminum processing – Specialized die and lubricant solutions for 1xxx, 3xxx, 5xxx, 6xxx, 7xxx alloys.
Surface protection guarantee – No galling, no scratching, Ra ≤0.4 µm finish.
Independent line diagnostics – One line can be serviced while the other runs.
Global service network – Installation, training, remote support.
Integrated Dual‑Line Drawing Cell
A complete automated cell includes:
Dual‑head automatic hydraulic pointer – Prepares ends for both lines.
Dual‑line hydraulic drawbench – Core unit with shared base but independent controls.
Dual‑line straightener – Two independent straightening heads (or one high‑speed unit alternating).
Separate cut‑to‑length saws & stackers – Keep products segregated.
Conclusion
For aluminum processors needing to double output without doubling floor space, labor, or capital investment, the dual‑line cold drawing machine for aluminum bars and tubes is the ideal solution. Two independent, high‑precision lines operate simultaneously – drawing different alloys, sizes, or shapes – while sharing a compact footprint and a single operator. From EV battery cooling tubes to aerospace structural bars, the dual‑line drawbench unlocks new levels of productivity for the aluminum industry.
Ready to double your aluminum drawing capacity? Contact FangRong with your bar/tube specifications for a custom layout proposal.
Know More About Us FangRong Metallurgical Equipment Manufacturer in China since 1998. Professional in Metal Straightening machine, Cold Drawing machine, Push Pointer Drawing Machine, Automatic Three Lines Drawing Machine, Thread rolling machine, Tube-end shrinking machine, Pointing Machine, Core pipe machine, Polishing Machine etc.
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Keywords: Dual‑line cold drawing machine, aluminum tube drawbench, aluminum bar drawing machine, twin‑line drawbench, high‑output aluminum drawing, EV battery tube drawing, aerospace aluminum bar drawing, independent dual drawing lines.
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