Feed-Jet milling system compact cartridge design enables speeds to be doubled
Article Type: Aerospace Technology From: Aircraft Engineering and Aerospace Technology: An International Journal, Volume 81, Issue 1
By incorporating a small, very compact insert cartridge into its latest Feed-Jet, multiple tooth milling cutter system (Figure 3), LMT’s Kieninger division has developed a cutter that is said to be able to run at up to double the speed of a normal face mill due to the number of inserts it can carry maintaining the same rate of feed per tooth.
Figure 3 LMT’s Feed-Jet multiple tooth milling cutter is able to run at double the speed of a normal face mill
Figure 3 LMT’s Feed-Jet multiple tooth milling cutter is able to run at double the speed of a normal face mill
In addition, the new cutter, now available from LMT (UK) of Coventry requires lower torque from the machine spindle drive, has a high-precision body, and the PCD-cartridge design enables special requirements to be defined such as high-cutting depth, surface roughness and percentage contact area. The cutter body design also has a minimum number of separate components and utilises high-precision stress-free friction clamping giving a simple fine adjustment of each cutting edge for perfect “flat” running and minimal creation of rags or burrs.
The Feed-Jet cutter bodies are all aluminium and range in diameter from 63 mm with eight teeth to 125 mm with 16 teeth. The largest cutter can also be specified with an additional two teeth depending on the application. The positive interlocking of each PCD-cartridge unit requires a low-torque setting that prevents the cartridge moving on final tightening and ensures each cartridge unit is set to precisely the same height.
LMT Kieninger’s Feed-Jet milling cutters have recently completed extensive trials in automotive applications to produce joint faces on transmission housings, cylinder heads and crankcases as well as the milling of valve bodies where the high demands of surface finish with excellent predictable tool life contribute to higher spindle utilisation with minimal downtime.
Available with each cutter body are three main cartridge configurations for face and shoulder milling and a wiper insert. However, there is also a special CT-cartridge with 75° lead angle and 0.2 mm by 45° chamfer for semi-finish milling operations where the surface has to be prepared ready for a defined finish and flatness specification.
Details available from: LMT (UK) Limited, Tel.: +44 (0) 24 7 636 9770, Fax:+44 (0) 247 636 9771, web site: www.LMT-tools.com
