Star SU to Feature G250 Vertical Gear Grinder at IMTS

According to iAbrasive latest news, Star SU is the go-to-market cooperative partnership of Star Cutter Company of Farmington Hills, MI, SU America, Inc., the US sales and manufacturing unit to SAMP, S.p.A., and Bourn Koch Inc. of Rockford, IL. It offers a wide variety of machine tools, precision cutting tools and services and will exhibit this machine during IMTS in Chicago, Illinois, September 8-13, 2014.

In the automotive industry the manufacturing of high-precision gears and transmission components is an element of crucial importance. In recent years an increasing demand for the performance requirements of automotive drivetrains has put a considerable pressure on gear manufacturers. The automotive industry is constantly searching for new production solutions that ensure the greatest efficiency, low-maintenance, reliability and the fastest possible production times in gear manufacturing. In addition, the continuously evolving market situation highlights the need for extremely flexible solutions to be able to deal with the ever changing consumer requests.

It was with these challenging requirements in mind that Samputensili developed the G 250 gear grinding machine. Presented at EMO Hannover 2011, the machine has rapidly become a big hit in the automotive market.

In the G 250 the minimum axis distance between worktable and grinding wheel is only 40 mm, and its grinding spindle can achieve 12.000 rpm. Due to the combination of these two unique features, the grinding process is also possible using profile / threaded grinding wheels with very small outside diameter, mounted on the main spindle. Workpieces with tool diameter limitations, for example shoulder-type gears, can be ground without any additional devices. Similarly, double and triple pinions with very small distances can be ground with the proper tooth-to-tooth alignment. An add-on optional spindle multiplier up to 24.000 rpm, with quick connection system to the main spindle, allows the use of electroplated CBN profile grinding wheels with outside diameter down to 25 mm.

The grinding spindle with its specifically large tool capacity allows the use of long grinding worms to raise the tool life of single or combination worms of roughing and finishing tools employing electroplated CBN or ceramic bound grinding worms and wheels. Therefore customers can always rely on the most efficient technology or the most beneficial combination to complete their grinding task.

Due to the extremely high rotational and linear accelerations with their appropriate absolute speeds, the machine guarantees excellent cycle times and is perfectly suited to benefit from future developments in the grinding tool sector. Universal quick change clamping systems for mass production environments allow rapid tool change, so that valuable grinding time is never compromised.

The profile dressing unit consists of a standard profile diamond dressing roll mounted on a dedicated spindle, which is located on the rotating table structure. An optional diamond OD dressing tool can be mounted on the dressing unit structure, in order to have the necessary flexibility to dress the OD of the grinding wheel.

The Samputensili menu-guided operator interface with simulation capability, simple machine design concepts in terms of tooling and dressing technology, fast automation and amazing user friendliness are the strengths behind this unique machine.--iAbrasive report