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Thread: flattening hot rolled plate
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4th Aug 2018, 09:39 PM #16Golden Member
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I have read about people putting a grinding cup wheel on a drill press or a round coulmn mill.
The wheel spins in horizontal plane and the drillhead is rotated on the column and the wheel is wiped across the workpiece.
I've got no idea how safe/dangerous this might be - will have a google
Found one, read post #4- https://www.practicalmachinist.com/v...g-mill-177069/
............ and wear your Ned Kelly armoured suit just in case the cup wheel shatters
https://www.youtube.com/watch?v=BrRewbhx8z8
Probably more stuff around with some googling
Bill
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4th Aug 2018, 10:50 PM #17Senior Member
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I have done this with a cup wheel on a manual mill.
I used a small cup wheel as a big one got bogged down too easily.
I crept up on the Z feed, probably 0.01 mm at a time. Or maybe 0.005 mm.
I was relying on the X axis ways for flatness.
Anything more aggressive simply stalled the motor. There did not seem to be much risk of the cup wheel bursting.
Eh - it worked.
Cheers
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4th Aug 2018, 11:44 PM #18Golden Member
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Thanks RCaffin intertesting to hear that somebody has actually done it.Here is other UTube of somebody doing the same as you described https://www.youtube.com/watch?v=soBPKhxpaBg
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5th Aug 2018, 09:23 AM #19Senior Member
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I used a smaller cup wheel and traversed faster. Didn't have a mag clamp, so had to use jigs. The secret really is to take very fine cuts imho.
I was horrified to see the way all the sparks from the grinding were hitting the Z axis dovetail. Most unwise.
Cheers
Roger
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