The cavity on the engine nacelle joint on the aircraft wing can be open and closed. The main challenge for closed cavity machining is the side walls and deep grooves that are at an acute angle to the bottom surface.
Engine pod joint
Interchangeable milling system
The CoroMill ® 316 end mill is the first product in the new interchangeable head milling system. Diameter from 10mm to 25mm.
CoroMill ® 316 end mill
With CoroMill ® 316, you get higher productivity, better versatility, lower inventory, better part quality and lower tooling costs. This new concept tool provides both the high strength required for roughing and the high rigidity required for finishing. A solid carbide shank for large overhang milling is now available.
Milling slot
If you want to machine deep and narrow grooves, use a three-sided milling cutter for optimum stability and productivity. Three-sided milling cutters can be used in groups while cutting multiple surfaces.
Sandvik Coromant CoroMill ® 331
The CoroMill ® 331 milling cutter with adjustable knife card is equipped with the new new materials S30T and S40T for optimum machining results.
Roughing 3D cavity with acute angle
An acute angle sidewall of less than 90 degrees is a common cavity characteristic. Depending on the stability of the machine, directional milling with CoroMill ® Plura ball end mills or a custom-designed CoroMill ® 390 milling cutter is a good choice.
Finishing 3D cavities with acute angles
Four-axis or five-axis machines are required to machine sharp-angle sidewalls. If the cavity has only one side wall with an acute angle and the bottom is flat, four axes are sufficient; however, if the cavity has an acute angle on both sides and a circular transition at the intersection with the bottom, a five-axis machine tool must be used.
At this point, a very good surface quality can be achieved with a taper ball end mill.
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