I found the following on one of my favorite blogs and thought I would share....
Hydraulic tracer mills and how they were used with a 4th axis to make complex parts. Pre CNC....
The date: 1945. Cutting an impellor for a turbocharger or centrifigul flow turbojet. Twin hydraulic tracing probes, larger than life tracing models, 4th axis, and a Bridgeport headed mounted on that Cinci milling machine so they can get more rpms.
1952. Could be the same machine, just a little bit older and with a few more modifications. Note the one tracer model is on the 4th axis, so it drives the A-axis. The Z-axis is controlled by the model that is just off the picture on the left. The models look like they're made from plywood?
Making 4 simultaneous blades for a jet engine with a tracing mill...
Boring on a jet engine section. Note the shopmade steady rest under the flange. Just a couple of bearings to support the bottom.
1 comment:
What blog did you find these on? These are great! If I had to guess, I'd wager that the models are probably phenolic - not that I have any insights, but the durability of phenolic probably made it a great material for masters, and the dark color looks about right.
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