This subdivision means that the forces needed to achieve superior forming rates and high degrees of deformation are relatively low, allowing ready-to-install precision spline geometries to be produced.
As its name implies, the applied process is a pure forming technique during which no swarf is generated.
Using rolling tools a blank is formed onto a roller mandrel (support die).
Depending on the requirements, different process applications are employed. These include splining from cup-shaped blanks, spinning and splining from disc-shaped blanks, or direct splining from disc-shaped blanks (direct cold reduction).
As a result, a diversity of profile geometries can be produced on internally and/or externally splined workpieces.
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.
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.
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.
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.