Twin Head Tube Bending Machines form [2] bends simultaneously, and are ideal for high speed bending of symmetrical tubular parts. Automotive Seat Frames, Handles, Furniture, and Frames of many descriptions are typical applications. Twin Head Tube Benders can be tooled to bend the following profiles: - Round tube or pipe - Square tube or rectangular tube - Solid rod - Flat stock - Angle iron - Aluminum extrusions - Some roll formed sections

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		IMAGES Click for larger view		VIDEOS Click to view video
		01   Model 26000 Twin Head Bender		<1.2mb> Production rates of 600-800 per hour can be achieved when bending [2] tubes per machine cycle
		02   Twin Head Bender & Piercing of Roll Formed Channel with Hand Load and Automatic Unload		<1.8mb> See roll formed channel pierced, bent, and automatically ejected at the rate of 360 per hour
		03   Flat plate measuring 3.5" wide x .625" thick [88.8mm x 15.8mm]		<800kb> See a Model 50000 Twin Head Bender bend a steel plate measuring 3.5" wide x .625" thick [88.8mm x 15.8mm]
		04   Twin Head Bender Combined with Tube End Former		<629kb> See the Standard Model 26000 Twin Head Bender with an in-line Hydraulic Tube End Former
		2-Bend Part with Swaged End
		05   Twin Head Extrusion Bender		<986kb> See a modified Model 26000 Twin Head Bender forming a large door frame
		Aluminum Extrusions

Types of Criterion Twin Head Compression Tube Benders Criterion Twin Head Tube Benders are available in both CNC and Non CNC Types. The same bend head modules are utilized for both applications. The compression bend head modules are available in [3] standard sizes. The tube diameters listed below are the maximum tube sizes. The minimum tube size per tube bender is dependent upon application details. Please consult Criterion for your application. Model 7500 Twin Head Tube Bender .75" [19mm] Diameter Model 26000 Twin Head Tube Bender .25-1.50" [25-38mm] Diameter Model 50000 Twin Head Tube Bender 2.00-2.25" [ 50.8-57.2mm] Diameter

Model 26000 shown

Twin Head Compression Tube Bender - Non-CNC

All Criterion Non-CNC Twin Head Tube Benders provide flexibility and adjustments in the following areas:
- Degree of bends
- Radius of bends
- Distance between bends
- Range of tube diameters

Options for Non-CNC Twin Head Compression Tube Benders

The following options are available in all sizes of Twin Head Tube Benders:
- Auto Loading and Auto Unloading [Bundle or magazine loaders available]
- 90 Degree Bend Head Rotation [Often used to form 4-6 bend, multi-plane parts]
- Bend Head Tilt [Used to form a 2-bend part with each bend in a different plane]
- Bend Head Close Centers
- Auto Tube Centering
- Vertical Bend Head Adjustment
- Weld Seam Tracker
- Powered Notch/Cope End Gage
- Pre-Pierced Hole Locating Gage

		IMAGES Click for larger view		VIDEOS Click to view video
		06   Bend Head Tilt Option		n/a
		07   Model 26000 Twin Head Bender with Automatic Load and Unload		<1.1mb> See 2-bend tubes automatically formed at the rate of 1,000 per hour
		08   Bend Head 90 Degree Rotation		<1.2mb> See the rotation of the bend heads by an operator, and forming of [2] 160 degree bends

CNC Twin Head Compression Benders

Using the same modular compression bend heads, Criterion also offers multiple axis CNC Twin Head Compression Tube Benders. Twin Head CNC Tube Benders come in 4-axis and 5-axis versions.

A 5-Axis CNC Twin Head Tube Bender consists of the following axes:
Degree of bend-1
Degree of bend-2
Distance between bends-1
Distance between bends-2
Plane of bend

A CNC Rotating Tube Center Clamp located between the bend heads provides the Plane of Bend axis.

CNC Twin Head Tube Benders are available with automatic bundle loading and automatic tube unloading options. In addition, CNC Twin Head Tube Benders can be integrated with an in-line Transfer Machine to form a complete fabricated part.

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		09   4-Axis CNC Twin Head Bender		<1.3mb> See 6-bend parts bent at the rate of 320 per hour
		10   5-Axis CNC Twin Head Bender		<2.5mb> See a 10-bend symmetrical part being formed
		10-Bend Shopping Cart Frame

Twin Head CNC Draw Bender

Another type of CNC Twin Head Tube Bender uses CNC Draw Tube Bending Heads instead of Compression Bend Heads due to "interference zone" and flexibility issues.

A Twin Head CNC Draw Tube Bender is typically used in applications where the tube length relative to the tube diameter is very long, and there are numerous bends required. Bending this type of tube is not often feasible on a conventional single head CNC Draw Tube Bender since the tube may "distort" under its own weight during the final part rotations.

Automotive brake lines, fuel lines, HVAC lines, and airbag diffuser tubes are typical applications for this equipment.

Net bending output can be increased by locating [2] Twin Head CNC Draw Benders in-line as shown in the photo below.

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		11   Twin Head CNC Draw Bender		<2.3mb> See a 32-bend part formed every 40 seconds. Tube is 5/8" [16mm] diameter, by 14' [4.26 m]

Twin Head Bending Limitations

The principal dimensional limitation that must be considered when using a Twin Head Tube Bender is the minimum distance between the bends, also known as minimum centers of radii.

The "X" dimension shown on the drawing below illustrates this point. The minimum distance between bends varies from 3.9" to 10.5" depending on model of tube bender, tube centerline radius, and stroke of eccentric clamp shaft. Please consult Criterion for application assistance in this area.

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		12   Minimum Distance Between Bends		n/a

Related Topics:
>>CNC Rotary Draw Tube Bending Machines
>>Special Tube Bending Machines