PROCESSES

Direct joining & clinching

The GROB direct joining/clinching process is based on a straightforward and universally applicable principle: de-pending on the application;
the total joining effort needed is broken down into numerous of axial, radial or combined joining increments.

BENEFITS

- Forming and joining in a single step
- Joining of different materials
- Economical tooling costs
- Up to 4 different forming tools
- 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

SITEMAP
IMPRINT
DATA PROTECTION

This process offers an efficient alternative to established forming and joining processes such as welding, riveting or bonding.

In contrast to other GROB spline forming processes, the tools (punches) do not rotate in a planetary motion around the roller spindle, but „stamp" at a 90 degree angle to the workpiece, from inside to outside.

As practically no spline fillet is generated, splining can be run very close to shoulders or steps.

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]
...
...

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
...
...

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
...
...

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
...
...