Article on profile tooling for a lathe?

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Article on profile tooling for a lathe?

This topic has 14 replies, 12 voices, and was last updated 24 November 2020 at 10:20 by Ady1.

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23 November 2020 at 17:40 #509425
Diane Carney
Moderator
@dianecarney30678
I've just had an elderly gentleman on the phone looking for directions to an article on how to make a 'copying device' in a lathe. I think he means a profile tool, but he was struggling to describe what he wants to achieve. It sounds as though he wants to make some matching bronze cnadlesticks. He was sure there has been an article on how to make the tooling in either ME or MEW but he doesn't have an author's name.

He lives in rural Cornwall (near St Austell) with no family or 'Workshop' friends or club near by but is a magazine subscriber. He's a jeweller/silversmith to trade, not an engineer.

Can anyone remember any articles on profile tooling? I don't recall anything in my time at ME, but it's possibly been in MEW. Any ideas I'll pass on.

Many thanks
Diane
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23 November 2020 at 17:40 #20040
Diane Carney
Moderator
@dianecarney30678
23 November 2020 at 17:41 #509426
Diane Carney
Moderator
@dianecarney30678
Should have said … he has no computer.
23 November 2020 at 18:11 #509441
larry phelan 1
Participant
@larryphelan1
I ,ve seen things like that for wood lathes but never for metal lathes.

Sounds like a set up with a number of stops, not sure how it might work.
23 November 2020 at 18:22 #509446
JasonB
Moderator
@jasonb
Sounds like a template and follower rather than a form tool as that would be rather large unless his candlesticks are for a dolls house.

Andrew J did one on his hydraulic attachment but there are simpler ones that just use a DTI or sprung follower.

EDIT MEW107 has a sprung loaded one.

Edited By JasonB on 23/11/2020 18:27:04
23 November 2020 at 18:23 #509447
Martin Connelly
Participant
@martinconnelly55370
Search hydraulic copy in threads for some information.

Martin C
23 November 2020 at 18:39 #509450
old mart
Participant
@oldmart
It might be possible to modify a taper turning attachment fitted to a lathe for copying. At very least, the cross slide leadscrew would have to be disengaged.
23 November 2020 at 19:32 #509460
peak4
Participant
@peak4
I've never used one, but this seems an ideal job for the Turnado system using a pattern to be copied.

Bill

Edited By peak4 on 23/11/2020 19:35:50
23 November 2020 at 19:48 #509464
GoCreate
Participant
@gocreate
Maybe this will help. I profile turned my connecting rods using a former. My video shows how I did it.

Profile turning Lion connecting rods

Nigel
23 November 2020 at 20:09 #509467
John P
Participant
@johnp77052
Hi Diane

In MEW 157 there was an article on flycutting profiles by Mick Knights page 44 "flycutting of radial forms"

John
23 November 2020 at 20:21 #509469
JohnF
Participant
@johnf59703
Old Mart is correct there have been a couple of articles using the taper turning attachment with a profile template, if my memory is good one was making a fusee. I feel sure it was in MEW ???

Edit fusee link

https://www.model-engineer.co.uk/forums/postings.asp?th=136166

Edited By JohnF on 23/11/2020 20:26:03

Thinking allowed– maybe using this principle with a template tied to the TT or a suitable bracket if the TTA is not available then a spring load applied to the cross slide as Jason suggests and a suitable follower with maybe a small roller following the template.

Edited By JohnF on 23/11/2020 20:30:46
23 November 2020 at 21:04 #509475
Keith Long
Participant
@keithlong89920
Diane

I think the following thread on here might be the one that you're after – https://www.model-engineer.co.uk/forums/postings.asp?th=110851.

Particularly the postings by "Nobby" where he shows how he uses a template.
23 November 2020 at 22:34 #509497
Diane Carney
Moderator
@dianecarney30678
Thanks for those useful posts. I might have difficulty referring him to anything on this forum as he doesn't seem to have access to anything online … but it's whiled away most of my evening!.
Thanks for the MEW reference, Jason. That sounds a similar method to that shown by Nigel for his Lion con rods.

I found this here also of iterest.

Thanks again
Diane
23 November 2020 at 22:46 #509501
Michael Gilligan
Participant
@michaelgilligan61133
Posted by Diane Carney on 23/11/2020 22:34:23:

.

I found this here also of iterest.

Thanks again
Diane

.

Nice bit of form-tool work there

… but doing that with bronze could be ‘challenging’

MichaelG.
24 November 2020 at 10:20 #509556
Ady1
Participant
@ady1
A spring tool setup is what I remember, but it was a really old article from about 1940

The spring moved the cross slide

Edited By Ady1 on 24/11/2020 10:21:28
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