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 [cold forming / slotting / coining / forming] Timing belt pulleys [cold forming / slotting / coining / forming] Flex plates [cold forming / slotting / coining / forming] Starter ring gears [cold forming / slotting / coining / forming]
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 [cold forming]
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.
Composite brake discs [cold forming / slotting / coining / forming]