Kellenberger has been part of the Hardinge Grinding Group for 20 years. The VARIA universal cylindrical grinding machine model range has more than 1,000 machines in use around the world. The VARIA machine concept has constantly been updated with new developments. "Now, with its larger work space, longer machine table, and the distance between centers of 63 inches (1,600 mm), it is ready for even more comprehensive grinding possibilities," said a company spokesperson.
The VARIA's features are designed for demanding requirements involved in the high-precision production of prototypes and small and medium-size production batches. Typical areas of use include machine construction, the production of tools and molds, and the production of precision components for the automotive, electronics, aircraft industries and job shops with a wide variety of needs.
The newest generation of hydrostatic guideways in the VARIA is designed for excellent damping, stick-slip-free operation, high rigidity and a constant machine temperature, resulting in outstanding surface quality and productivity. "Because of the direct drives on the rotary axes, high positioning speeds and accuracy are guaranteed," said the spokesperson.
In the new VARIA, the solid machine table with the reinforced machine bed improves rigidity. The increase in stability means VARIA can now work with workpieces of up to 661 lbs. (300 kg).
With larger heights of and distances between centers, the new VARIA is faster and more precise. Drives optimized for performance move the longitudinal and cross slides at speeds of up to (787 IPM) 20 m/min., and at an axis resolution of ten nanometers.
The hydrostatic B-axis is equipped with a direct drive also. Allowing the revolving wheelhead to rotate roughly three times as fast as without a direct drive, and positions with a precision of less than one arc second.
The VARIA is available with distances between centers of either 39.4" or 63" (1,000 or 1,600 millimeters) and heights of centers of either (7.8" / 9.9" / 11.8") 200 / 250 or 300 mm, as required. Travel on the X-axis and Z-axis is extended. Due to the modular machine concept, the task at hand defines the position of the wheelhead within the machine, and this way ensures an optimum in distance and dressing conditions. More than 30 wheelhead variations with external and internal grinding spindles permit an array of grinding possibilities, and the right application-specific configuration at all times.
The VARIA is equipped with the latest Heidenhain GRINDplus640. In addition to the Heidenhain controls with user-guided ISO programming and selective help images, for the first time Kellenberger offers its controls with a graphical programming and collision monitor. The controls allow faster-working speeds at even higher precision. Axis control in the Nano range translates into accurate profiling and track accuracy for contour grinding. Optionally, the VARIA can be equipped with the FANUC 31i, as in previous models. The new remote maintenance concept with integrated IT security ensures higher security when connecting to the customer network via VPN tunnel or mobile communication.
Low-pressure hydrostatics and a new, optimized cooling system with bypass regulation valve are two of many new features. Other features of VARIA machines include low-friction linear axes, back lash free spindle drive, drives optimized for performance, thrifty valve technology, a circulating lubrication system with no oil loss and options to switch off unused features.
For more information contact:
Hardinge Inc.
P.O. Box 1507
Elmira, NY 14902-1507
800-843-8801
info@hardinge.com
www.hardinge.com