Reducing / Expanding

The tube is clamped during the forming operation by min. 2 clamping chucks. A guided reduction ring resp. expanding mandrel is pushed over the tube end and the work piece is expanded / reduced. GFU prefers a closed machine housing which grants:

  • longevity of the machine
  • continuous high precision of the parts
  • easy access to tools
  • best run-out percision because outside guided tools

Automatic tool changer available for optional multiple process.

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Grafik
Airbag pressure vessel
Airbag pressure vessel
Airbag presure vessel

Ø 30 x 1,9 mm

     

  • Airbag pressure vessel for side airbag
  • operating pressure approx. 600 bar / 8700 psi
  • diameter reduced on both ends using GFU reducing technology (cold forming)
  • bottom closed with GFU high-speed end-forming (hot forming)
  • both ends mechanical treated
  • 100% measuring of all parts
  • Poka Yoke check system
  •  

Airbag pressure vessel
Scaffold rod
Scaffold rod

Scaffold rod

Ø 50 x  2,3 mm

  • welded ingoing tube without scraping of weldseam
  • diameter on both ends reduced (cold forming) to Ø 40,3 mm 
  • both ends forming length approx. 310 mm 
  • reduction grade > 20%
Scaffold rod
OCTG Casing 14"
OCTG Casing 14"

OCTG Casing

Ø 14" x 20 mm

  • conical expanded by cold forming
OCTG Casing 14"
OCTG Casing 16"
OCTG Casing 16"

OCTG Casing

Ø 16" x 17,5 mm

  • conical reduced by cold forming
OCTG Casing 16"
Steering shaft
Steering shaft

Steering shaft / power steering

Ø 50 x 2 mm

  • one side reduced to Ø 47 mm
Steering shaft
Push point
Push point

Push point

Ø 2" – 7"

  • wall thickness  4,0  - 12,7 mm
  • tensile strength approx. 550 - 950 N/mm²
  • diameter reduced on one side (cold operation)
  • max. forming length approx. 500 mm
  • max. reduction approx. 38% - 45% depending on material grade
Push point
Steering shaft
Steering shaft

Steering shaft

Ø 50 x 2 mm

  • one side expanded to Ø 53 mm
Steering shaft
Tie bar for trucks
Tie bar for trucks

Tie bar

Ø 50 x 4,8 mm

  • one side reduced to Ø 42 mm
Tie bar for trucks
Cardan shaft
Cardan shaft

Cardan shaft

Ø 88,9mm x 1,9 mm

     

  • reduced by cold forming
  •  

Cardan shaft
OCTG Casing 16"
OCTG Casing 16"

OCTG Casing

Ø 16" x 14 mm

  • conical expanded by cold forming
OCTG Casing 16"
OCTG Casing 7"
OCTG Casing 7"

Casing reduced

Ø 7" x  12,6 mm

     

  • reduced by cold forming
  •  

OCTG Casing 7"
OCTG Casing 18 5/8"
OCTG Casing 18 5/8"

OCTG Casing

Ø 18.5/8" x 20 mm

  • conical reduced by cold forming
OCTG Casing 18 5/8"
Push point
Push point

Push point

Ø 2" – 7"

  • wall thickness 4,0  - 12,7 mm
  • tensile strength approx. 550 - 950 N/mm²
  • diameter reduced on one side (cold operation)
  • max. forming length approx. 500 mm
  • max. reduction approx. 38% - 45 % (depending on material grade)
Push point
OCTG Casing 13 3/8"
OCTG Casing 13 3/8"

OCTG Casing

Ø 13.3/8" x 22 mm

  • conical reduced by cold forming
OCTG Casing 13 3/8"

 

Performance

The required pressing force for each single type of parts is calculated first to choose the respective type of press.

The drive train of the machines are servo-hydraulic, hydraulic or PLC driven.

To enable a highly flexible part handling this is customized to the concept of the production line.

 

Application

Automobile Industries:

  • airbag high pressure vessels
  • shock absorber tubes
  • power steering cylinders
  • chassis parts
  • steering shafts
  • tube end calibration
  • push points
  • furniture tubes
  • scaffold tubes

Advantages of Reducing / Expanding

  • Weight optimization: Reducing / expanding allows a specified distribution of the wall thickness for weight-sensitive components e.g. for car applications. Frequently the reducing / expanding technology is the economic alternative to rotary swaging.
  • Safety: Reduced or expanded parts always are showing homogeanous fibre flow. Related to machined parts, this non-interrupted fibre flow brings higher strength to the components.
  • Konzepts: With our know how we are at your disposal to guide you during establishing new production concepts based on GFU reduction and expanding technologies. Beside of feasibility check we propose the new machine concept up to the delivery of a complete and turn-key production line including all needed units.
  • Reducing of single components: Work pieces which used to be welded of several single pieces can be produced using pipes as pre-product. This creates a massive cost-reduction on storage cost for single components.

    We are at your disposal to support you in creating new production concepts based on GFU forging / swaging technologies. Beside of feasibility check we propose the new machine concept up to the delivery of a complete and turn-key production line including all needed units.
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GFU - Maschinenbau GmbH

Gesellschaft für Umformung und
Maschinenbau

 

shipping address: Dieselstr. 3
54634 Bitburg / Germany


administration: Lilienthalstraße 9
54634 Bitburg / Germany

phone: +49 6561 694940
fax:      +49 6561 12430

email:   info@gfu-forming.de

Contact us

In case you need further information or your have any question, please send an email or use the form below - we will get in touch with you immediately.
 

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