1. Reducing / expanding press / swagers

Profile

The tube is held axially by at least two clamping jaws during forming. A guided drawing-in ring or expanding mandrel is pushed into/over the tube and in this way expands/reduces the workpiece. The closed design of the machine housing preferred by GFU ensures:

For necessary multiple operations, we offer an optional automatic tool changer.

Models

Get to know our models

Pointing press
HP 20

Partinflator / pressure vessel

Component dimensions
Øa: 20 - 40 mm
Length: 120 - 400 mm
Wall thickness: 1.5 - 3.5 mm

Technical data
Pressforce: 250 KN
Presshub left: 100 mm
Forming: hydraulic

Pointing press
HP 20

Handling system

Part dimensions:
Øa: 35 - 65 mm
Length: 450 - 800 mm
Wall thickness: 1.5 - 3.5 mm

Technical data
Bending force: 400 KN
Pressforce: 300 KN
Pressstroke left: 50 mm
Pressstroke right: 100 mm
Forming: hydraulic

Pointing press
HP 40-2

Part dimensions
Øa: 20 - 48 mm
Length: 1400 - 2000 mm
Wall thickness: 2.0 - 3.5 mm

Technical data
Pressforce: 300 KN
Pressstroke left: 300 mm
Pressstroke right: 300 mm
Forming: right / left hydraulic

Pointing press
HP 50

Part dimensions
Øa: 35 - 50 mm
Length: 150 - 4000 mm
Wall thickness: 2.0 - 5.0 mm

Technical data
Pressforce: 500 KN
Pressstroke: 300 mm
Forming: hydraulic

Pointing press
HP 100

OCTG 1

Part dimensions
Øa: 50 - 180 mm
Length: 500 - 6000 mm
Wall thickness: 4 - 12 mm

Technical data
Pressforce: 1000 KN
Pressstroke: 300 mm
Forming: hydraulic

Pointing press
HP 100

OCTG 2

Part dimensions
Øa: 50 - 180 mm
Length: 500 - 6000 mm
Wall thickness: 4 - 12 mm

Technical data
Pressforce: 1000 KN
Pressstroke: 300 mm
Forming: hydraulic

Pointing press
HP 250

Part dimensions
Øa: 50 - 180 mm
Length: 1800 - 14000 mm
Wall thickness: 5 - 15 mm

Technical data
Pressforce: 2500 KN
Pressstroke: 500 mm
Forming: hydraulic

Pointing press
HP 250-2

Double line

Part dimensions
Øa: 50 - 180 mm
Length: 1800 - 14000 mm
Wall thickness: 5 - 15 mm

Technical data
Pressforce: 250 KN
Pressstroke: 500 mm
Forming: hydraulic / 2-fold

Pointing press
HP 500

Swager Premium Casing

Part dimensions
Øa: 60.3 - 406 mm
Length: 4000 - 14000 mm
Wall thickness: 6 - 22 mm

Technical data
Pressforce: 5000 KN
Pressstroke: 500 mm
Forming: hydraulic

Double swaging line 2
HP 500-2

Swager Premium Casing

Part dimensions
Øa: 60.3 - 406 mm
Length: 4000 - 14000 mm
Wall thickness: 6 - 22 mm

Technical data
Pressforce: 5000 KN
Pressstroke: 500 mm
Forming: hydraulic 2-fold

Pointing press
HP 750

Swager Premium Casing

Part dimensions
Øa: 60.3 - 504 mm
Length: 4000 - 14000 mm
Wall thickness: 6 - 22 mm

Technical data
Pressforce: 7500 KN
Pressstroke: 800 mm
Forming: hydraulic

Components

Here you can find a list of all the components you can produce with our machines.

Airbag inflator

- Ø30 x 1.8 mm
- 2-fold reduction (cold)
- precise geometries
- final machining possible

Cardan shaft

- Ø89 x 2.4 mm
- reduction (cold) to Ø71 mm
- high repeat accuracy

Premium Casing API (cladding tube)

- Ø406 x 17 mm
- Retraction angle 2°
- Retraction length 200 mm
- Conical reduction (cold) to Ø392 mm
- High repeat accuracy

Premium Casing API (cladding tube)

- Ø340 x 12.7 mm
- expansion angle 2°
- draw-in length 200 mm
- conical expansion (cold) to Ø326 mm
- high repeat accuracy

Premium Casing API (cladding tube)

- Ø340 x 12.7 mm
- expansion angle 2°
- expansion length 200 mm
- conical expansion (cold) to Ø354 mm
- high repeat accuracy

Tubular fishing rod (cross section)

- Ø177.8 x 4 mm
- draw-in length approx. 300 mm
- reduction (cold) to Ø113.8 mm
- high repeat accuracy

Pipe fishing rod

- Ø340 x 12.7 mm
- Retraction angle 2°
- Retraction length 200 mm
- Conical reduction (cold) to Ø326 mm
- High repeat accuracy

Scaffolding tube

- Ø57 x 2.4 mm
- draw-in length on both sides 330 mm
- reduction (cold) to Ø48.3 mm
- high repeat accuracy
- precise concentricity of the reduced tube ends

Shock absorber (piston side)

- Ø57 x 2.7 mm
- draw-in length 50 mm
- reduction (cold) to Ø52.6 m
- high repeat accuracy
- precise concentricity of the reduced tube end

Shock absorber (bottom side)

- Ø57 x 2.7 mm
- draw-in length 70 mm
- reduction (cold) to Ø47.2 mm
- high repeatability
- precise radial runout of the reduced pipe end
- combined with GFU high-speed endforming to close the necked bottom side

Shock absorber (bottom side)

Performance data

The pressing forces are calculated individually for each component and the respective press types are then selected. The system drives are based on servo-hydraulic, hydraulic or CNC drives. The handling of the components is tailored to the respective system concept in relation to the components and thus enables maximum flexibility.

Fields of application

Automotive industry:

Airbag vessels
Shock absorber tubes
Power steering cylinder
Chassis parts
Steering columns
Pipe end calibration
Pipe angling
Furniture tubes
Scaffold tubes
Casingrohe (Premium Casing)
OCTG Pipes Oil & Gas Industry

Advantages

of the retracting / expanding:

Weight optimization: Drawing / expanding enables targeted wall thickness distribution in weight-critical components, such as in the passenger car sector. Drawing-in is often a significantly cheaper and faster alternative to swaging.
Safety: Components produced by drawing in / expanding basically have a homogeneous fiber course. Due to this uninterrupted fiber flow, components can be subjected to higher loads with the same material input, in contrast to machined parts.
Concept: We are happy to assist you with our know-how in the creation of new production concepts based on GFU necking and flaring technology. Our offer includes, starting with the sampling over the creation of a machine concept up to the delivery of complete production lines, all stations.
Reduction of single components: Work pieces, which used to be made of multiple single components and then welded, can be forged to wrought products. Beside of the better material properties, forging / hammering generates also cost savings on storage of single components.

We are happy to assist you with the creation of new production concepts based on drawing-in and expanding technologies and our know-how. Our offer covers all stages, from sampling and the creation of a machine concept to the delivery of complete production lines.