Precision Grinding
grinder for the manufacturing and regrinding of round and nonround cutting tools, from Ø 0.1 to 16 mm. Its features include an automatic loading/unloading system, precision clamping system, and innovative V-block and steadyrest support. The machine can grind specialty tools, including form tools, indexable and nonindexable inserts, replaceable- tip tools, reamers, taps, step tools, torx drivers, surgical and dental tools, among others.
Aside from improved ergonomics, such as a larger control monitor, the 628XS features a new Fanuc control 30iB. The workhead has been redesigned to accommo- date quick-change features to switch from round tools to inserts. The guiderails of the three major linear axes have also been reinforced.
“The linear scales are not glass scales anymore, but mag- netic, which increases the life of the scales,” said Eric Schwar- zenbach, president of Rollomatic. “The design of the guiderails and other moving parts has been deliberately focused on longevity with minimal maintenance intervention.”
OMG, EXPANDING MACHINE VERSATILITY FOR OVER 50 YEARS
We can avail ourselves of the technical know-how and human resources requi- red to design and manufacture cutting edge products. We have a strong focus on providing quality customer service, with the goal of maximizing customer satisfaction.
Series MO Series TA
Previously, the machine featured a belt drive, with a servomotor controlled by a rotary encoder. “On the 628XS, we have fitted a rotary glass scale that is directly coupled to the workhead spindle, thereby taking the belt drive out of the equation. This allows us to control the rotary tool axis move- ment much tighter. Its benefits include better flute finish and higher feed rates.”
The flexibility of the 628XS lies in several areas. The workhead is configured so one can switch from round tools to inserts simply by swapping two plates. “The switch over is remarkably rapid,” Schwarzenbach said. The other is the proprietary software, VirtualGrindPro, which features a large library of different types of cutting tools and inserts ready for grinding. The machine also has an optional wheel and nozzle changer, which includes six wheel packs with the coolant nozzles prepared and ready for production grinding.
Unique Hydrostatic Guideways While it is marketed as a universal, high-precision
grinder, the recently updated Kellenberger Kel-Varia from Hardinge (Elmira, NY) is targeted at low-volume, high- value, large and heavy parts, especially those that are nonround, such as polygons, free contours, and eccentric shapes—a consequence of the C-axis option of interpolat- ing the X and C axes.
This spring, Hardinge began offering a new direct-drive workhead and hydrostatic B axis on the Kel-Varia. The preci- sion hydrostatic guideways in combination with the direct- drive workhead technology provide extreme accuracy in concentricity and radial run-out: Part roundness of <0.2 μm; nonround contour accuracy of <6 μm; internal eccentric bore of <4 μm; straightness (slots) of <2 μm.
Series HT Series VH
Tilting angle head
Series BAH Series T
OMG NORTH AMERICA 802 Clearwater Loop, Post Falls, ID 83854 Phone: 866-440-8519 e-mail:
info@omgamerica.com
Series TSI/TSX
Jeff Hilliard, North American sales manager for Grinding, Hardinge, said the hydrostatic guideway system is unique. Hydrostatic guideways, combined with a strict separation of the machine base from the assemblies that generate heat or vibration, provide superb precision and productivity. The hydrostatic guides for the longitudinal slide move-
Series MT-TC-TC3
ment (Z axis) and for wheelslide infeed (X axis) provide the basis for the machine’s extreme accuracy. The X- and Z-axes movements are practically frictionless at all speeds. There is no stick slip; even the smallest increments of 0.1 μm can be traveled without a problem. Because there’s no metal-to-metal contact, there are also no wear charac- teristics compared to the traditional Vee and Flat system.
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ManufacturingEngineeringMedia.com | November 2013
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