PROCESS

spinning sheet metal

In the GROB spinning process, discs are formed into cup-shaped blanks, whereby spinning wheels forms the material over a spinning mandrel.

BENEFITS

- Very flexible process
- Economical tooling costs
- Very high forming performances
- Forming of hight strenght sheet metals
e.g. fine-grained structual steel S700MC / complex-phase
steel CP-W® 1000 (Thyssenkrupp Steel Europe AG)

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

With this process, superior forming performances and accuracy can be achieved, allowing extremely economical output.

All machine parameters relevant to the forming process can be set and changed via the CNC controls of the machine,

providing rapid and flexible response to material-specific variations (e.g. spring-back behavior) between individual raw material batches.

APPLICATIONS

POWERTRAIN - sheet metal

Sheet metal components, splined, slotted and coined on GROB machines allow space-saving, lightweight elements which are eminently suitable for powertrain assemblies that shift under load. Typical examples are clutch disc carriers made of high-strength sheet steel. Tube-in-tube sets of steel or aluminium that telescope within each other along splines are used as drive shafts which incorporate safety functions.

Typical applications

Clutch plate carriers [cold forming / stroke-stamping / slotting / coining / forming]
Tube-in-tube sets for drive shafts [cold forming]
Sensor discs [cold forming / slotting / coining / forming]
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ENGINE TECHNOLOGY - sheet metal

Sheet metal components, splined, slotted and coined on GROB machines are popular in both lightweight design applications and as highly accurate elements for speed detection.

Typical applications

Sensor Discs
Timing belt pulleys
Flex plates
Starter ring gears
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AUTOMOTIVE ENGINEERING - sheet metal

In addition to engine and power train applications, GROB cold forming is used to produce various other cost-effective automotive components. A typical example is splined tubing for height adjustment in steering columns.

Typical applications

Tube-in-tube steering columns
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BRAKE DISCS - sheet metal

High-precision, splined and slotted cup shapes preformed from light-gauge sheet metal are pressed into brake friction rings. The resultant lightweight disc brakes offer significant weight savings compared to cast iron brake discs.

Typical applications

Composite brake discs
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