The machining operations are performed on cast iron FT 25, which is the material of our transmission casings.
The choice of horizontal machining centers is due to the fact that we have to machine aligning bores on 2 opposite sides.
The casings are mainly composed of 2 or 3 parts (lower, middle, and upper casing), depending on the type of gearbox.
For our biggest gearbox (“20000” series), the total machining time of all 3 parts is approximately 25 hours (not including set-up and adjustment).
Finishing the bore lines of these “20000” series casings takes 16 hours. This operation requires some 50 tools.
The biggest bore diameter is 480 H7 mm.
A very high degree of dimensional precision (here: tolerance H7) and geometric accuracy (trueness of the various bores and bore lines) is essential for the final assembly.
The table measures 1,240 mm x 505 mm.
Maximum stroke is 1,016 mm along the X-axis, 500 mm along the Y-axis, and 500 mm along the Z-axis.
It has a FANUC 6MA enclosure for small parts machining operations (accessory components attached to the main casing: flanges, bell-housing, pump body, etc.)
It is used to drill the through holes for the bolts in the coupling flange and mating flange…
…or to remove teeth from, or bore holes into hollow drive pinions and clutch hubs, among others.