Carving SS316 sheet metal, this is a first for me!
Preparing the combustion chamber of the RC turbine I needed to drill out holes in SS316 steel, some time ago I obtained a sheet of 0.5mm and a 2mm 2F straight bit for steel work.
Tonite I finally put it to the test after postponing it for quite some time.
First, some math:
The target surface speed of the cutter tip is by the mfgr stated to be 90m/min.
90m/min * 1000 / (diameter * 3.14) => 14.330 RPM
The feed rate, chip load for this 2mm bit is stated to be 0.01mm per tooth per revolution.
Feed rate = RPM * Chip thickness * number of flutes => 14330RPM * 0.01 * 2F => 285mm/min
I went to town cutting full depth (0.5mm)
Here is the part drawn out in F360 and tool paths have been generated. Since a few of the holes are the same diameter as the end mill I chose a peck drilling operation for those, and regular 2D contours for the rest (Ø2.5, Ø3,5 and Ø5mm) and a 3rd operation for the outline. Part was cut oversized and cut true to spec on the CNC.
It worked very well
Deburred the holes with a 60deg chamfer bit
Overall size is 300x75mm
What this sheet of metal is intended to become: