Electric Tube Bending Machine For Aluminum Profiles
The CNC Electric Tube Bending Machine is engineered for high-precision, distortion-free processing of aluminum profiles, round tubes, and complex hollow extrusions. Utilizing multi-axis absolute servo control, this machine delivers synchronized feeding, rotation, and bending to eliminate hydraulic fluid contamination, reduce energy consumption by 35% compared to hydraulic systems, and maintain tight dimensional repeatability for high-volume industrial production.
Technical Specifications
|
Parameter |
Specification Range / Standard |
|
Max. Tube Diameter (Round) |
Up to Ø120 mm (customizable up to Ø160 mm) |
|
Max. Profile Dimensions |
120 mm x 120 mm (Square/Rectangular) |
|
Max. Wall Thickness |
0.5 mm - 6.0 mm (Material dependent) |
|
Min. Center Line Radius (CLR) |
1.5 x D (Depending on tooling and alloy) |
|
Controlled Axes |
5 to 8 Axes (Y, B1, B2, C1, C2, A, X1, X2) |
|
Bending Accuracy |
+/- 0.05 deg via direct-drive servo gearboxes |
|
Feeding Accuracy |
+/- 0.03 mm via rack-and-pinion servo drive |
|
Drive System |
Full Electric Servo (Mitsubishi / Yaskawa servo motors) |
|
Control System |
Industrial IPC with 3D Simulation & Touchscreen GUI |
|
Max. Bending Speed |
120 deg/sec |
Key Features
Full Electric Servo Architecture: Eliminates hydraulic power units, reducing thermal drift, eliminating oil leakage risks, and delivering precise torque feedback essential for soft-alloy aluminum deformation control.
Dynamic Springback Compensation: Integrated algorithms calculate material rebound angles in real-time based on extrusion temper (e.g., 6063-T5, 6061-T6) and wall thickness, ensuring first-part-right output.
Programmable Mandrel Extraction: Servo-controlled early extraction timing prevents inner-wall wrinkling and cross-section collapse during tight-radius bends on thin-walled profiles.
Anti-Scratch Clamping Design: Non-marking wiper dies and pressure die assist mechanisms prevent surface scuffing on polished or anodized architectural aluminum profiles.
Modular Industrial Frame: Stress-relieved heavy steel weldment annealed at 600 deg C to eliminate internal structural tension, ensuring deflection resistance under maximum bending loads.
Working Process
Material Loading: The aluminum profile is loaded onto the feed carriage manually or via an automated bundle loader.
Mandrel Positioning: The internal mandrel advances to the tangent point of the bend to support the inner wall and prevent flattening.
Feeding & Rotation: Servo motors position the tube linearly (Y-axis) and rotationally (B-axis) for the first bend coordinate.
Bending Execution: The C-axis bend arm rotates around the center former while the pressure die and booster apply synchronized forward thrust to counteract thinning on the outer radius.
Unclamping & Extraction: The clamping die releases, the mandrel retracts slightly before the final stripping phase, and the cycle repeats for multi-radius complex geometries.
Applications
Automotive: EV battery cooling tubes, structural crash members, and sunroof guide rails made from 6000-series aluminum alloys.
Architectural Systems: Curtain wall mullions, structural canopy frames, and curved window framing profiles requiring zero surface distortion.
HVAC & Refrigeration: Return bends and complex manifolds in copper-alternative aluminum heat exchangers.
Industrial Equipment: Robotic arms, conveyor guide rails, and lightweight machine enclosures.
Tooling & Configuration
Tooling Material Selection: Tooling sets are precision-machined from Ampco bronze, hardened tool steel (H13), or nylon/delrin inserts depending on profile abrasiveness and cosmetic requirements.
Standard Tooling Package: Includes bending die, clamp die, pressure die, wiper die, and standard mandrel plugs matched to the client's specific CAD profile drawing.
Quick-Change Tooling System: Hydraulic or mechanical quick-release arbors enable complete tooling changeovers in under 15 minutes, minimizing line downtime for multi-product batch runs.
Customization
Multi-Stack Tooling: Configurable with two or three tool stacks for variable-radius bending within a single setup.
Automation Integration: Seamlessly interfaces with robotic loading/unloading arms, automatic punch/drill heads, and industrial conveyor systems for unmanned cells.
Specialized Cross-Sections: Custom wiper dies and segmented mandrels engineered specifically for asymmetric extruded aluminum profiles, hollow channels, and multi-void thermal break sections.
Quality & Testing
In-House Machining Capabilities: Critical structural frames, gearboxes, and main spindles are machined on 5-axis DMG MORI CNC boring mills to maintain geometric tolerances within +/- 0.01 mm.
Rigorous Factory Acceptance Testing (FAT): Every machine undergoes a mandatory 72-hour continuous dry-run test followed by live material trials using the customer's actual aluminum profile samples.
Dimensional Inspection: Finished bend samples are verified using laser trackers and FARO arms to cross-check centerline radii, angular deviation, and ovality rates against client CAD data.
FAQ
Q: How does an electric tube bender prevent surface scratching on anodized aluminum profiles?
A: The machine utilizes non-marking polyurethane pressure inserts, low-friction bronze wiper dies, and programmable clamping pressure control. Because the feeding and clamping motions are managed by independent servo axes rather than high-pressure hydraulic cylinders, surface friction and pressure spikes are minimized, protecting finished architectural finishes.
Q: What is the typical tooling lifespan when processing 6063-T5 aluminum extrusions?
A: Wiper dies and mandrels typically process between 50,000 to 100,000 bends before requiring maintenance or re-machining, depending on wall thickness, lubrication quality, and whether the aluminum has an abrasive mill finish or protective coating.
Q: Can this machine handle asymmetric hollow aluminum profiles without collapsing the inner walls?
A: Yes. By utilizing a multi-link flexible mandrel (plug or ball mandrel) combined with servo-controlled early mandrel extraction and a programmable booster die, the machine maintains internal cavity support through the entire bending arc to prevent wrinkling or flattening.
Q: What is required for installation and operator training?
A: The machine operates on standard industrial 3-phase power (380V/415V, 50/60Hz) with compressed air (0.6 MPa). We provide complete on-site or remote installation, PLC/IPC programming training, and geometric calibration by our senior commissioning engineers.
Q: How are software updates and remote diagnostics handled?
A: The control system features an industrial PC with built-in Ethernet connectivity. Our engineering team can securely log into the PLC via VPN for remote troubleshooting, parameter optimization, and software updates without disrupting plant operations.
Q: What is the standard lead time for a custom-tooled machine?
A: Standard configurations ship within 45 to 60 days. Units requiring custom multi-stack tooling designed specifically for complex architectural or automotive aluminum extrusions typically require 75 to 90 days, which includes sample testing and trial sign-off prior to shipment.
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