Multi-Stack Tube Bending Machine

High-Precision CNC Multi-Stack Tube Bending Machine

Engineered for complex multi-radius tube bending and automatic roll bending in a single setup.

Multi-stack tube bending utilizes multiple bending dies mounted vertically on a single head. This configuration enables the processing of different centerline radii, mixed geometry bends, and combined rotary draw and push-roll bending without stopping for manual tool changes.

Multiple Tooling Stacks

Accommodates 3 to 6 independent tooling levels on a single bending head.
Combines different bend radii, wiping dies, and pressure dies into one continuous automated cycle.
Executes continuous transitions between rotary draw bending and push bending for variable-radius curves.

Tube Size Flexibility

Processes round, square, rectangular, and custom extruded profiles in carbon steel, stainless steel, aluminum, and copper.
Handles tube outer diameters from 6 mm up to 114 mm with wall thicknesses from 0.8 mm to 6.0 mm.
Achieves tight bend radii down to 1.0D using integrated mandrel units and internal boost systems.

Tool Changeover

Quick-change clamping components reduce mechanical tooling swap time to under 15 minutes.

Digital axis positioning automatically recalls stack heights and pressure settings per stored job file.

Eliminates physical re-alignment between multi-radius setups, minimizing trial-and-error scrap.

Production Efficiency

Single-stage processing reduces material movement between separate machine stations by 60 percent.

Servo-driven axis synchronization achieves repeat positioning accuracy of plus-minus 0.05 mm and bend angle accuracy of plus-minus 0.05 degrees.

Compatible with automated loading and unloading systems for continuous production cycles.

Applications of Multi-Stack Tube Bending Machine

Automotive Exhaust and Fluid Lines:

Executes tight-radius bends and complex branch geometries without tube repositioning.

Aerospace Tubing Systems:

Controls wall thin-out and ovality tolerances on thin-walled titanium and stainless steel lines.

HVAC and Refrigeration:

Forms heat exchanger coils and multi-bend headers in one uninterrupted operating cycle.

Furniture and Structural Frames:

Combines wide-radius push bends with sharp structural draw bends on aesthetic metal frames.

Technical Specifications

Parameter	Specification
Max Tube Outer Diameter	12 mm to 114 mm
Max Wall Thickness	1.0 mm to 6.0 mm
Tooling Stacks	2 to 6 Levels
Drive Type	Full AC Electric Servo Motor
Bending Angle Accuracy	Plus-minus 0.05 degrees
Distance Accuracy	Plus-minus 0.05 mm
Rotation Accuracy	Plus-minus 0.05 degrees
Max Centerline Radius	250 mm to 400 mm
Control System	Multi-Axis Industrial Controller with 3D Simulation

Models

MS-38 Electric Multi-Stack Bender

• Max Capacity: Outer Diameter 38 mm by 2.0 mm wall thickness
• Tool Stacks: 3 Levels
• Axis Count: 7-Axis All-Electric Servo

MS-63 Electric Multi-Stack Bender

• Max Capacity: Outer Diameter 63.5 mm by 3.0 mm wall thickness
• Tool Stacks: 4 Levels
• Axis Count: 9-Axis All-Electric Servo

MS-90 Heavy-Duty Multi-Stack Bender

• Max Capacity: Outer Diameter 88.9 mm by 4.5 mm wall thickness
• Tool Stacks: 3 Levels
• Axis Count: 11-Axis All-Electric Servo

Why Choose Us

All-electric servo movement eliminates hydraulic fluid temperature changes and maintains consistent bending forces.
Heavy-duty cast iron bending head structure minimizes frame deflection during maximum capacity operations.
Built-in 3D interference simulation detects potential tool collisions prior to physical production.
Custom tooling sets are machined in-house and verified via coordinate measuring machine inspection before delivery.

FAQ

Q: What is the main operational difference between a multi-stack bender and a single-stack bender?

A: A multi-stack bender holds several tool sets at the same time. This allows multi-radius bends, variable push-bending, and integrated forming in one sequence without stopping the machine to change tooling.

Q: How does electric servo control affect bending consistency?

A: Electric servo motors provide direct position, velocity, and torque feedback for each axis. This eliminates angle variation caused by hydraulic oil heating up during extended shifts.

Q: Can this equipment process wide-radius bends alongside sharp bends?

A: Yes. Dedicated tooling levels can be equipped with roll-bending dies to execute continuous push bending for large radii within the same program as standard draw bends.

Q: Which metal alloys can be processed on these benders?

A: The machines process carbon steel, stainless steel, aluminum alloys, copper, titanium, and high-nickel industrial tubing.

Q: How are bending programs generated for complex tube shapes?

A: Programs are created by importing CAD files directly into the control software. The system calculates XYZ coordinates, bending sequences, and springback values automatically.

Request a Technical Proposal and Tooling Feasibility Analysis

Submit tube drawings to receive a complete bending simulation, tooling stack layout, and cycle time calculation from the engineering team.

Request Technical Proposal

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