Abrollformen Vollmaterial

PROCESS

Intermittent forming solid materials

GROB intermittent forming closes a technical process gap in forming technology and now offers new potentials for the highly efficient production of complex components.

Thanks to our newly developed kinematics, splines can be formed without the need for axial infeed and with very short spline fillets. .

BENEFITS

- Splines up to flange
- Universal application
- No axial infeed
- Superior spline and gear quality
- Surface work-hardening
- Surface finish Ra 0.4~ N5
- No disruption of material grain flow

PROCESSES

SPINNING SHEET METAL
COLD FORMING SPLINES
INTERMITTENT FORMING SPLINES

INTERNAL FORMING & JOINING
SLOTTING, COINING, FORMING SHEET METAL

MACHINES
A-SERIES COLD FORMING MACHINES

C-SERIES COLD FORMING MACHINES

R3 SPINNING MACHINE
i9 INTERNAL FORMING MACHINE

T12 COLD FORMING MACHINE

S8 SLOTTING MACHINE

ERNST GROB AG
Rohrgasse 9
P.O. Box 830
CH-8708 Männedorf
Switzerland

T +41 44 922 77 00
F +41 44 922 77 88
info@ernst-grob.com
sales@ernst-grob.com

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DATA PROTECTION

This enables the forming of a diversity of geometries including customized splines.
Corrections (flank line modification, crowning in axial and radial directions) can also be generated within the workpiece.
This ability to generate complex geometries allows several functions to be combined in individual components.

Characteristic for workpieces produced by intermittent forming are their optimal precision and surface finishes, combined with the other familiar benefits of cold forming: work hardening, enhanced material structures, material savings etc.

GROB cold forming machines equipped with quick-change couplings can be converted from the conventional cold rolling process to intermittent forming with minimal downtimes.

This superior flexibility and modularity offers significant savings on shorter production runs. The extremely short cycle times, moreover, also permit maximum productivity with higher volumes, including large-scale series output.

APPLICATIONS

POWERTRAIN - Solid stock

Mit dem GROB- Kaltwalzverfahren hergestellte Steck- und Laufverzahnungen sowie Torsionsfedern, werden dank dem wirtschaftlichen Verfahren und den prozessbedingten Vorteilen sehr oft in Bauteilen des Antriebsstrangs von Personenwagen, Nutzfahrzeugen oder landwirtschaftlichen Fahrzeugen eingesetzt.

Anwendungsbeispiele

Getriebewellen
Steckachsen
Gelenkwellen
Antriebswellen
Gabelwellen
Abgangswellen
Flanschwellen
Getriebeschaltwellen
Kupplungswellen
Novikov-Getriebe
Radwellen
Halbwellen
Abtriebswellen
...
...

ENGINE TECHNOLOGY - solid stock

The extremely high manufacturing accuracy achieved on GROB cold forming machines makes them eminently suitable for precision spline and gear generation on key engine components such as camshafts for valve lift adjustment.

Typical applications

Crankshafts
Camshafts
Starter pinions
...
...

AUTOMOTIVE ENGINEERING - solid stock

In addition to engine and power train applications, GROB cold forming is used to produce various other cost-effective automotive components.

Typical applications

Steering half-shafts (height adjustment)
Brake actuation camshafts
Torsion bars
Power take-off shafts
ABS sensor splines
Axle bridges
Constant-velocity joints
Steering pinions
...
...

INDUSTRY - solid stock

In addition to superior cost-effectiveness, the technological benefits of cold forming are crucial to the success of numerous industrial applications. Prominent among these are, for example, high accuracy levels, surface work-hardening, low distortion after post-forming heat treatment etc.

Typical applications

Extruder shafts
Pump drive shafts
Torsions bars
Shredder blade shafts
Splined shafts for printers
Door closer racks
Selector shafts for medium- and high-voltage switchgear
...
...