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I have a tool database created by Microsoft Access. Some computer guru created it for me several years ago. It's a bit of work to set up,but once it's there all you have to do is maintain it when new tools are introduced.
These are high quantity production parts (200 per run), so we can't be cleaning the spindle for every part. Also it seems to be mostly one bore size that jumps. There is an air blast from the spindle at every tool change so I'm hoping that the shavings are blown away. These parts are machined on a HMC. Do you think that the material could be a problem (hard spots)?
I'm boring 5 different hole diameters in a ductile iron casting (rough and finish) from cored holes. Hole sizes vary from 1.50" to 3.75". Once in a while about 1 in 100 parts 1 or 2 bores jump in size up to .005" from the previous part. Without any adjustment the next parts are back to proper diameters. I don't have an explanation for this problem and these parts cost about $500 each. Does anyone else experience this?
Thanks
Len
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