Stretch Forming Presses​

Process accuracy, consistency, and repeatability using Stretch Forming

Macrodyne Stretch Forming Presses are available in a variety of configurations to form Sheet Metal, Extrusions, and Brake-Formed Profile Parts by using the Stretch Forming method. The Sheet Press is typically used to form large sheets, while the Swing Arm (V-Press) is used for Extrusions and Break Formed parts. Each can be equipped to form any of the three types of parts. These forming methods are used worldwide across many industries. Most notable in the Aerospace industry. We understand the aerospace industry’s requirements, and we have consistently delivered solutions to them that are reliable, repeatable, and precise. Macrodyne is committed to supplying quality hydraulic press solutions that exceed the needs of your industry.

Sheet Stretch Forming Press for Fuselage Skin Panels

Designed to grip each end of the sheet stock material. Then it applies the required tension force to stretch the material beyond its yield point and into its plastic region. It maintains the sheet tension while the sheet is wrapped over the Forming Die. This process creates quality parts with no wrinkles, even stress distribution, and minimum spring back.


The machine’s structural components are designed using FEA, stress relieved, and accurately machined to provide rigid support of the forming process.

The Loading, Unloading, and Forming motions of the press are controlled by a PLC-based CNC control system. An added feature of the control system is the ability to create part forming programs. The programs provides consistent and repeatable forming cycles for quality parts production. The programs can be saved and reloaded for future use.

  • Die table size
  • Die Table Tilt
  • Yoke Carriages
  • Yoke Swing
  • Rotating Die Table
  • Jaw Curving
  • Jaw Centroid Lift
  • Jaw Rotation
  • Jaw Oscillation
  • Auxiliary Die Tables
  • Axillary Curving Jaws
  • Axillary Extrusion Jaw
  • Die Handling Systems
  • Strongbacks for Bullnosing with machines with Curving Jaws
  • Bulldozer for secondary forming operations
  • Walkway Systems – Interior and Exterior
  • Complete Hydraulic System – sized for the application
  • Chiller Cooling Water System – if required
  • Safety Systems – to protect personnel and equipment.

Control Features

PLC-based Control System with HMI for CNC functional axis control for process accuracy, consistency, and repeatability of more than 30 axes of motion. Forming type available based on press type:

  • Drape
  • Stretch Draw
  • Transverse Forming
  • Longitudinal Forming
  • Bullnosing, including Leading Edge Forming
  • Stretch Wrap – utilizes Tangency tracking device
  • Transverse/Longitudinal – w/ Rotating Die Table

Note: Special part, die, and press forming program development software package available.

V-Style Stretch Wrap Forming Press

Typically used to form small and large Aerospace parts (fuselage frame chords, stringers, longeron, etc.). But often used in other industries that form extrusions or sheet metal brake-formed parts, such as: Rail Car frame components, Industrial Track Rails, Architectural, structural supports, and decorative components, to name a few.


Designed to grip each end of an Extrusion or Brake-Formed sheet metal part with a pair of Jaws. Each Jaw mounts to a tension cylinder that is trunnion mounted to a carriage to allow the Jaw to pivot horizontally. Each carriage is mounted on a Swing Arm. The Swing Arms are pivot mounted on each side of the table. A cylinder drives each Swing Arm to pivot the arms from a position 90 degrees to the table to 10 degrees forward of the table. This arrangement sets the tension cylinders and Jaws parallel to the Die Table mounting surface.


With a forming-die mounted to the Die Table and the part loaded into the Jaws, the press can apply a tension load to the part to stretch the part material beyond its yield point and into its plastic region. It then wraps the part over the die while maintaining the stretching sheet tension. This process evens out the stress distribution in the part cross-section to prevent wrinkling and minimize spring back.


The machines structural components are designed using FEA, stress relieved and accurately machined to provide rigid support of the forming process.


The Loading, Unloading, and Forming motions of the press are controlled by a PLC-based CNC control. An added feature of the control system is the ability to create part-forming programs. Programing provides consistent and repeatable forming cycles for quality parts production. The programs can be saved and reloaded for future use. This reduces setup time for increased efficiency.

  • Tonnage Capacity – 5 to 150 Ton
  • Die Table Size
  • Jaw Type
  • Jaw Rotation
  • Jaw Lift
  • Carriage Cross Slide Adjustment
  • Part Length Capacity
  • Die Posts
  • Jogglers w/Jib Crane
  • Complete Hydraulic System – sized for the application
  • Chiller Cooling Water System – if required
  • Safety Systems – to protect personnel and equipment

Control Features

PLC based Control System with HMI for CNC functional axis control for process accuracy, consistency, and repeatability for up to 30 axes of motion. Controlled forming type available based on press type:

  • Stretch Wrap Forming
  • Reverse Bending
Note: Special part, die, and press-forming program development software package available.

Quad Axis Swing Arm V-Press

The Quad Axis Press is a specialty Swing Arm Press capable of Stretch Forming a 3D part. Six additional axes must be added to each Jaw of the standard Swing Arm V-Press design.

Standard Swing Arm V-Press Axes of Motion – X2 for left and right side

  • Jaw extend /retract
  • Jaw horizontal swing
  • Swing Arm Swing

Quad Axis Swing Arm V-Press Axes of Motion – X2 for left and right side

Standard Axes

  • Jaw extend /retract – can be carriage motion for some designs
  • Jaw horizontal swing
  • Swing Arm Swing

Additional Axes for Quad Axis Press

  • Jaw rotation
  • Jaw Lift
  • Swing Arm Swing

The three additional axes of motion to each of the two sets of Jaws, provided the range of motion for true 3D part forming.


This style press could look much different from a typical Swing Arm press due to its configuration. The Jaw extend/retract motions can be controlled by carriage motion. If the carriage height is tall, the carriage and arm configuration can change to support the carriage’s higher loads.

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