Swarf problems in Hollow tube

[Tim324]

Hi all,

Have been asked to look at a problem with swarf being stuck inside 3 metre steel tubing, which is in there after machining process on the lathe.
Currently flushing with coolant or blowing out with air doesn't remove it.
Has anyone any ideas on what plugs might be used. Or any other removal methods.

The hollow rods have an int/ex taper put on each end during the machining cycle.

Tim

[Claes Gefvenberg]

Hi Tim, and welcome to the Cove

Originally Posted by Tim324

Currently flushing with coolant or blowing out with air doesn't remove it.

Yeah... I see your problem. 3m is a lot of tube to stick in. Ok, questions first

Tell me: Just how does it stick?

Due to size? What's the size of the swarfs compared to the tube int diam? Could the size/shape of the swarfs be changed by using a different cutting tool?

Adhesion to tube wall? Could a high pressure nozzle (fluid or air) be pushed through the length of the tube? Perhaps the best option would be to prevent it from getting in there in the first place. How about an expanding plug inside the taper you mentioned?

/Claes

[Tim324]

Thanks Claes,

We have been looking at plugs in the last 12 hours, I agree the best way is to prevent it getting in there in the first place.
It seems to work well. Just need to look at best methods of inserting the plug before machining on the lathe is done.

Thanks again

[Bill Ryan]

Welcome to the Cove Tim

Silly me - but what is "swarf"?

[Claes Gefvenberg]

Originally Posted by Bill Ryan

Silly me - but what is "swarf"?

Chips, turnings, cuttings from the turning lathe.

/Claes

[Bill Ryan]

Thanks Claes - never heard that term before.

[Claes Gefvenberg]

Originally Posted by Bill Ryan

Thanks Claes - never heard that term before.

I think it's brit English (and Aussie, obviously). Please, native English speakers - correct me if I'm wrong.

Anyway: here is a more detailed explaination.

/Claes

[Jim Wynne]

Originally Posted by Claes Gefvenberg

I think it's brit English (and Aussie, obviously). Please, native English speakers - correct me if I'm wrong.

Anyway: here is a more detailed explaination.

/Claes

Actually, my (American Heritage dictionary indicates that it might come from a little closer to home for you, Claes:
http://www.bartleby.com/61/36/S0933600.html

Etymology: Of Scandanavian origin; akin to Old Norse svarf

I've heard the word used in US metalworking shops, although I don't think it's widespread.