Star Cutter Company's NTG-4L with integrated linear motor technology.
Samputensili G 250 vertical gear grinder
Star SU LLC will showcase the latest in cutter grinding featuring linear motor technology. Also on display will be the G250 vertical gear grinder.
Engineered to manufacture complex cutting tools, the new Star NTG-4L tool and cutter grinder is a 5-axis, CNC controlled cutter grinder for manufacturing, sharpening and reconditioning a wide variety of cutting tools. Made in the U.S.A. and equipped with a four-station wheel pack changer, the NTG-4L is built for high productivity and precision.
Machine features include a mineral cast base for increased damping and thermal stability performance. All three axes are driven by linear motor technology, which is designed to eliminate elasticity, backlash, friction effects and drive chain vibration typically found in ball screw and belt driven designs. Both of the NTG rotary axes have integrated torque motors for high and precise torques at optimal speeds. The machine is designed for high mix, low volume jobs due to its quick set-up and stability. For the high volume manufacturer, an optional automation package utilizes a FANUC LR Mate robot.
"Partnered with the flexibility that comes from NUMROTO software, the NTG-4L is designed and tested to have years of worry free production and backed with world class service featuring 24 hour response time performed by factory trained technicians," said a company spokesperson.
G250 Vertical Gear Grinder
The Samputensili G 250 gear grinding machine is a generating and profile grinding machine designed for cylindrical gears with a maximum outside diameter of 250 mm and shafts with lengths up to 550 mm. The machine is based on the dual work spindle concept, which is designed to eliminate non-productive times. With this feature, the loading / unloading process of a workpiece is carried out in masked time, while simultaneously the manufacturing process proceeds on another workpiece. "Unlike other applications, the gear meshing is conveniently carried out directly in the grinding position for better accuracy and minimum change-over time," said the spokesperson. "Indeed, only in this position can the meshing be achieved with a micron-level accuracy. Therefore the G 250 represents the ideal solution for those customers who need very low cycle times and efficient mass production of gears."
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 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 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," said the spokesperson. "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 O.D. dressing tool can be mounted on the dressing unit structure in order to have the necessary flexibility to dress the O.D. of the grinding wheel.
If the tooth root diameter must be ground as well, a tip radius dressing roll is applied to create the required tip radius on the grinding tool. When required, the dressing unit is automatically brought into the working position by the rotating movement of the worktable. This helps provide precise and rigid positioning. The dressing movements are actuated by the interpolation of the axes.
Customers may use generic profile dressing rolls on the machine. Customers may employ both single and double flank dressing rolls, as well as multi-rib type.
A hydraulically actuated swivel arm brings the inspection probe into position and retracts it from the work area during the grinding process; profile, lead and pitch inspection is performed. Results may be directly printed or stored on a memory device.
"The Samputensili menu-guided operator interface with simulation capability, simple machine design concepts in terms of tooling and dressing technology, fast automation and user friendliness are the strengths behind this unique machine," said the spokesperson.
For more information contact:
Star-SU, LLC
5200 Prairie Stone Pkwy #100
Hoffman Estates, IL 60192
847-649-1450
sales@star-su.com
www.star-su.com
IMTS 2014 Booth N-6924