Preventing distortion.

Preventing distortion.

This topic has 7 replies, 5 voices, and was last updated 26 November 2019 at 09:36 by not done it yet.

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11 November 2019 at 19:03 #436898
Simon Lee 2
Participant
@simonlee2
I have to cut a full length key way in a metre long by thirteen millimetre piece of EN24 round bar. The cut isn't a problem, but I am concerned that the bar will bend horribly when the stress is relieved assymetricaly. Is there any way of stopping it, or correcting it? Thanks, So.
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11 November 2019 at 19:03 #9929
Simon Lee 2
Participant
@simonlee2
11 November 2019 at 19:20 #436900
Anonymous
Depends upon the exact material spec. If it's EN24T then it's hardened and tempered so has already been stress relieved to some extent.

Andrew
12 November 2019 at 13:41 #436966
Zan
Participant
@zan
The late great John Stevenson showed us how to straighten a bent lead screw with a lever in his badgers workshop posts. So correcting any bend shouldn’t be too difficult, but it all depends on the exact material spec as Andrew says, and also the function of the part.

Todays update from Bodgers Lodge

Search for this thread, Long, but interesting reading

Edited By Zan on 12/11/2019 13:41:56
12 November 2019 at 14:38 #436980
Martin Kyte
Participant
@martinkyte99762
Cut another keyway on the oposite side.

regards Martin
12 November 2019 at 17:47 #437009
not done it yet
Participant
@notdoneityet
Posted by Martin Kyte on 12/11/2019 14:38:38:

Cut another keyway on the oposite side.

regards Martin

Likely only need to cut the stressed skin of the shaft. Keith Fenner on utube manages t straighten bent shafts quite well. Likely others.
25 November 2019 at 22:41 #438800
Simon Lee 2
Participant
@simonlee2
Righty ho, vee blocks and a lead hammer it is then. Thank you all.
26 November 2019 at 09:36 #438825
not done it yet
Participant
@notdoneityet
Posted by Simon Lee 2 on 25/11/2019 22:41:17:

Righty ho, vee blocks and a lead hammer it is then. Thank you all.

That’s not prevention, it’s recovery!
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