All-Electric Tube Bending Machine

The All-Electric Tube Bending Machine utilizes independent CNC servo drives for every motion axis-including bending, feeding, plane rotation, mandrel shift, and pressure die assist. By removing hydraulic circuits, this architecture eliminates thermal drift caused by oil temperature fluctuations and reduces energy consumption by up to 40% compared to traditional hydraulic equivalents.

Built on a stress-relieved Meehanite cast iron bed, the machine provides the structural rigidity required to process high-tensile stainless steel, titanium, and aluminum alloys for demanding industrial sectors.

Multi-Axis Synchronized Servo Control: Eliminates mechanical backlash by coupling servo drives directly to precision planetary gearboxes and ball screws.
Dynamic Pressure Die Assist: Programmable boost force applied during the bend cycle prevents wall thinning on outer radii and eliminates wrinkling on tight inner radii of thin-walled tubes.
Automatic Springback Compensation: The control system measures material elastic recovery angle post-bend and dynamically adjusts the final axis position to hit target geometries on the first part.
Interference-Zone Collision Simulation: 3D graphical programming software calculates tool paths and checks for machine-component clearance before physical execution.
Oil-Free Clean Operation: Zero hydraulic oil leakage or filtration maintenance requirements, making it compliant with cleanroom and medical manufacturing environments.

Material Loading: The raw tube is manually or automatically loaded into the pneumatic collet chuck on the carriage slide.
Feeding & Rotation: The carriage feeds the tube longitudinally along the X-axis while rotating it via the B-axis to position the next bend plane.
Mandrel Positioning: The internal mandrel advances to the tangent point of the bend to support the inner wall against collapse.
Bending Execution: The bend arm rotates around the center die while the pressure die and wiper die synchronize speed to draw the material uniformly.
Retraction & Unloading: The mandrel retracts slightly prior to the end of the cycle, the pressure die opens, and the finished part clears the tooling zone.

Automotive Exhaust & Fluid Lines: Processing complex multi-radius bends in stainless steel exhaust systems and chassis structural members.
Electric Vehicle (EV) Thermal Management: Bending thin-walled aluminum cooling tubes without crimping or restricting fluid flow channels.
Aerospace Fluid Conduits: Fabricating high-pressure titanium and Inconel hydraulic lines requiring strict adherence to wall thickness reduction limits.
HVAC & Refrigeration: Producing return bends and complex copper/aluminum manifolds with zero ovality.
Industrial Furniture & Equipment: High-speed batch production of structural frames with tight cosmetic standards.

Precision tube bending relies entirely on correct tooling geometry matched to the material yield strength.

Tooling Set Components: Bend die, clamp die, pressure die, wiper die, and internal mandrel (plug or ball link).

Material Selection: Standard tooling manufactured from hardened alloy steel (40Cr / SKD11). Anti-friction bronze or Ampco alloys available for aluminum and stainless steel applications to prevent scoring.

Quick-Change Design: Hydraulic or mechanical quick-release mechanisms allow operators to swap complete tooling stacks in under 15 minutes, minimizing changeover downtime.

Manufacturing requirements often extend beyond standard configurations. Engineering adjustments are available for:

Extended Bed Lengths: Accommodating raw tube lengths up to 6,000 mm or more.

Specialized Multi-Stack Tooling: Integration of multi-radius or left-hand/right-hand compound bending heads in a single cell.

Robotic Loading Cells: Interfacing with 6-axis articulated robots or gantry loaders for lights-out automated production.

Custom HMI Integration: Tailored PLC software communication protocols (OPC UA, Profinet) for direct integration into factory MES networks

Internal manufacturing protocols ensure structural rigidity and kinematic precision prior to factory dispatch:

Bed Machining: Machine frames are welded from heavy-wall structural steel, annealed at 650 deg C to release internal welding stress, and finished on a 5-axis CNC gantry milling center in a single setup.

Laser Interferometer Calibration: Linear axes and rotary tables are calibrated using Renishaw laser interferometers to verify positioning accuracy and repeatability.

Continuous Load Testing: Every machine undergoes a 72-hour dry-run endurance test followed by a live material test burn using customer-specified sample tubes to verify ovality and wall thinning parameters before shipment.

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