Kellenberger 100 Machine Concept Designed to Be Service-Friendly
EMO 2019: The Kellenberger 100 grinding machine’s FANUC 31i CNC features a simple operator guidance system on a 19" touchscreen panel.
The machine series includes a compact wheelhead, enhanced performance parameters and a service-friendly machine concept. The compact tandem wheelhead features a motor spindle, reinforced casing for larger internal grinding wheel diameters and 10 wheelhead variations for optimum layout of the machine based on the components to be processed. Higher grinding wheel drive power increases productivity, the Z-axis guideway leads to higher profile precision, and the direct-drive C axis makes the machine more precise for non-circular grinding, according to the company.
The Kellenberger service department was involved in optimizing the machine concept. The machine is said to enable faster maintenance and service operations as well as better accessibility.
Because creep-feed grinding is essentially a milling process, why not use a VMC? A grinding machine supplier describes how a VMC platform can make creep-feed grinding more effective.
In vertical grinding, the workpiece is held upright in a rotary chuck with the grinding spindle overhead. This configuration can improve roundness, facilitate single-setup processing and prolong the life of the machine. Loading and unloading may gets easier, too. Workpieces with relatively large diameters and short lengths benefit the most from vertical grinding.
Two enabling technologies -- superabrasive wheels and high precision servo control -- come together to provide a contour grinding process that resembles an OD turning operation. For many medium volume OD grinding applications, this method may be a means to consolidate several manufacturing steps into a single setup.