MICRO MACHINING | CASE STUDY
<< Figure 1:Wheel dressing procedures
can be automated and designed efficiently
through the integrated ultrasound sensor technology. >>
KERN PYRAMID
NANOand Grinding
Fitted with a grinding package, the fully hydrostatic 5-axis Pyramid Nano milling
centre by Kern Microtechnik is transformed into a highly flexible multi-function
machining centre. The wheel dressing unit, ultrasound sensor technology and grinding software enable the machine to carry out profile, round and flat grinding tasks.
Dennis Janitza, Managing Director of Kern Microtechnik GmbH, quickly explains the advantages: "No manual wheel dressing of the grinding wheels, only one machine with a high capacity potential — that wins praises from operators and management. Highly precise 5-axis positioning of the workpieces, best hydrostatic buffering and the precision of 0.5 µm produces workpieces with grinding machine quality in only one mounting process. To top it all, the Pyramid Nano can also perform highly precise milling tasks." Hydrostatic guiding systems and drives form the basis for frictionless work, no wear and tear and thus the highest precision and stability for an almost unlimited time. In combination with the highest resolution glass scales, precision motion can be achieved that equals that of eccentric heads known within the grinding technology.
Through the integration and implementation of the proper hardware and software, the user can select from many functions that are familiar from the traditional grinding processing centres. Because a grinding wheel has a geometrically undefined cutting edge, the laser tool measuring system integrated in the standard machining centre cannot be utilised to achieve the same precision as customary for milling processes. For this reason, an ultrasound sensor technology was integrated into the machine. This sensor technology is mainly used for three applications. During the wheel dressing, it checks the contact between the tool and the dressing unit and thereby enables an economical and efficient wheel dressing and sparking out of tools. During the touching of the workpieces, the contact between grinding tool and component can be detected with a precision of less than 0.5 µm in an extreme case and the zero points can be adjusted automatically.
During rough grinding, the sensor checks whether the tool is already in contact with the workpiece and if not, it increases the movement in incremental values until the workpiece is contacted. The successful application of the Kern Pyramid Nano for grinding processes is based on the high precision and the hydrostatics of the milling machine, supplemented by a ‘grinding package’ consisting of wheel dressing unit, ultrasound sensor technology and grinding software.
22 | commercial micro manufacturing international Vol 7 No.4
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52