Making a dome end on pipe

[John T]

Dave, your diagram worked pretty well....welded it up with some 3/32" 7014

Making a yard art cactus.....
.

That looks great.

If you were making multiple pieces, you could make a round mandrel (?) the same size as the ID as the pipe... weld it to a long rod and slide it up inside the heated pipe.... then tap it into shape.

[shortfuse]

Remember to use the OD dim for the math matrix.

I've seen that video...good one.

[shortfuse]

That looks great.

If you were making multiple pieces, you could make a round mandrel (?) the same size as the ID as the pipe... weld it to a long rod and slide it up inside the heated pipe.... then tap it into shape.

I started to do that with a piece of sucker rod I have. The largest OD of the pin end is a slip fit into the pipe ID, but the threaded end was a bit smaller than I needed. I looked all over my scrap pile and didn't find anything that would fit. Might try to grind down an old trailer hitch ball or axle and weld it to a long rod.

You are right, a mandrel would make for a speedy and consistent job!

[kuzineddie]

That turned out great!

[shortfuse]

No one was more surprised than me that it worked!!!!!!

[Kolas]

If the first drawing is to scale. Could you not change it's scale so that it's length is the same circumference of the pipe?
Then print, and trace, and cut?

[madmax718]

that is a sweet job!

[shortfuse]

If the first drawing is to scale. Could you not change it's scale so that it's length is the same circumference of the pipe?
Then print, and trace, and cut?

If you need to change the scale, just wrap a blank template around the pipe or measure it with a tape measure. Lay it out, divide by the number of segments you want and go from there. Really simple. I think there is a youtube video by Hobart showing how to make the template...search youtube for orange peel and look for the Hobart video.

[MinnesotaDave]

If the first drawing is to scale. Could you not change it's scale so that it's length is the same circumference of the pipe?
Then print, and trace, and cut?

The drawing was not to scale since it will change with each different size pipe.

The pipe size and number of petals are what dictate the size of everything on the drawing.

[William McCormick]

These are heated and hammered domes. It takes about five minutes each, and you just need to fill a quarter inch hole at the top.

I would have thought this method silly if someone just told me about it, in fact when the fellow who taught me, told me, I thought "oh my God this is going to suck". But in less than five minutes I was quenching a pipe he handed me with a dome that had a quarter inch hole in the top of it. He still has me beat for speed and sometimes I end up with a three eighths inch hole in the top of the dome, but I have improved to about five or six minutes.

You just keep rolling the pipe and hammering it medium lightly. It just turns into a dome. I have thought I messed them up a couple times, and just kept going to see what it would look like. To my surprise I was able to reshape it using different hammering angles.



Sincerely,

William McCormick

[John T]

These are heated and hammered domes. .

You just keep rolling the pipe and hammering it medium lightly. It just turns into a dome. I have thought I messed them up a couple times, and just kept going to see what it would look like. To my surprise I was able to reshape it using different hammering angles.


Sincerely,

William McCormick

Cool.

I'd like to see an action shot of those being made.

[William McCormick]

Cool.

I'd like to see an action shot of those being made.

Next job I get I will do that, it was much easier than I thought.

Sincerely,

William McCormick