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24th May 2021, 09:40 PM #1Most Valued Member
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- Aug 2015
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"CNC" gear hobbing before CNC hobbers were a thing
Doing a big cleanup at work and we're going through all the cupboards to work out what stays and what goes, so I figured this was a good time to take some pics.
One of our Mikron A22 automatic hobbers. Unfortunately we're missing some of the auto-loading system, so we have to run it as a manual one-by-one machine, but it is capable of fully automatic operation and it doesn't have a single computer chip in it, everything is electro-hydraulic. Hard to see the chart in the pic, but the spindle goes up to 7200 rpm...not bad for a machine pushing 40 years old; the change gears and worms for indexing all have oil jets directly on them to keep them happy at those speeds.
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This is a "program", each disc is 2 parts that can be adjusted to set the duration of each action in the cycle. Side note, anyone know anything about the munitions factory in Footscray?
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It mounts in the side of the machine and has a series of rollers that follow each disc to trigger the various solenoids.
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And this is the kind of stuff we can make with it: 0.2 module, 10 teeth, 0.8mm bore. Grain of rice for scale
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Attached Images
- PXL_20210524_101318158~2.jpg (212.2 KB)
- PXL_20210524_064205341.jpg (249.0 KB)
- PXL_20210524_064140599.jpg (215.3 KB)
- PXL_20210524_063958446.jpg (163.3 KB)
- PXL_20210524_064125059.jpg (231.1 KB)
- PXL_20210524_064037311.jpg (130.7 KB)
- PXL_20210524_064028795.jpg (202.0 KB)
- PXL_20210524_064025185.jpg (182.2 KB)
- PXL_20210524_064338661.jpg (257.5 KB)
- PXL_20210524_064348464.jpg (254.6 KB)
- PXL_20210524_064333871.jpg (260.6 KB)
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