Technology

The GROB cold forming process is based on a straightforward

and universally applicable principle: the total forming effort

needed is broken down into numerous forming increments

spread along the entire cylindrical length of the zone being

formed. Characteristic for workpieces produced by this process

are their superb precision and surface finish, combined

with the typical benefits of cold forming: cold work hardening,

enhanced material microstructure, material savings, low

hardening distortion etc.

The torque motor developed in-house allows workpiece high

speed indexing, resulting in the shortest possible production

cycle times.

Typical applications

In addition to its primary application, i.e. the cold forming of

splines on sheet metal components, the universal and modular

design concept of the model T12 cold forming machine allows

it to be used for other GROB processes such as spinning and

cold forming, stroke stamping or reduction, and including the

forming of large module splines in solid stock workpieces.

Benefits

This state-of-the-art machine concept generates very

high feed rates per workpiece revolution while delivering

optimal component quality.

Highly-dynamic machine axes facilitate simple operation

and control-aided correction and compensation of quality

relevant factors such as spline alignment, elastic recovery

behaviour, but also batch related variations.

Changeover times of just a few minutes provide our customers

with flexible planning potentials and just-in-time production.

The T12 machine concept can be readily expanded into a fully

automated production line when linked with other GROB

machines for the production of preforms (R3 spinning machine),

and also for the downstream processing of splined components

(S8 slotting machine).