Sheet metal rolling tool
Moderator: Mike Everman
-
- Posts: 20
- Joined: Fri Jun 02, 2006 1:13 am
- Antipspambot question: 0
- Location: detroit michigan
I've been having some trouble making decent tubes too, and I'm only using mild steel for my protoypes. I can get the basic shape so I can tack it into position, but then I get angular and flat sections which are so irritating when I've put so much care in cutting the templates out to be millimeter perfect.
Other than this home made slip roller, has anyone else had any luck with other methods of creating near perfect tubes?
I had an idea of using a set of barbells: tack the tube together, then place the bar of the barbells through the tube. Next, place the weights on the other end of the bar. You'd then need to rest the bar such that the weights aren't supported, so all the weight is on the bar which is pushing down on the tube you're rolling. You could then roll this whole contraption along: the weight and momentum of the barbells hopefully flattening out the kinks and making the tube smoother. What do you think?
Other than this home made slip roller, has anyone else had any luck with other methods of creating near perfect tubes?
I had an idea of using a set of barbells: tack the tube together, then place the bar of the barbells through the tube. Next, place the weights on the other end of the bar. You'd then need to rest the bar such that the weights aren't supported, so all the weight is on the bar which is pushing down on the tube you're rolling. You could then roll this whole contraption along: the weight and momentum of the barbells hopefully flattening out the kinks and making the tube smoother. What do you think?
-
- Posts: 4140
- Joined: Sun Oct 05, 2003 1:17 am
- Antipspambot question: 0
- Location: Mingo, Iowa USA
- Contact:
That sounds workable, IF you have a very flat slab (granite, concrete, steel work table) to support it. You would not want the weights to be excessive, because you want the bar to stay straight, not bowed up in the middle from the weights at the ends.loco wrote:I had an idea of using a set of barbells: tack the tube together, then place the bar of the barbells through the tube. Next, place the weights on the other end of the bar. You'd then need to rest the bar such that the weights aren't supported, so all the weight is on the bar which is pushing down on the tube you're rolling. You could then roll this whole contraption along: the weight and momentum of the barbells hopefully flattening out the kinks and making the tube smoother. What do you think?
L Cottrill
-
- Posts: 125
- Joined: Tue May 08, 2007 6:45 pm
- Antipspambot question: 0
- Location: Puget Sound
- Contact:
It shouldn't be too hard to build one of these:
http://www.harborfreight.com/cpi/ctaf/d ... mber=36698
http://www.harborfreight.com/cpi/ctaf/d ... mber=36698
-
- Posts: 474
- Joined: Mon Jul 30, 2007 2:43 am
- Antipspambot question: 0
- Location: British living in Chile
VARIATION ON A THEME
Here is my Cone Forming device
It is a variation on a type of sheet metal folding machine; it will not make beautiful smooth cones, like those used on some of the excellent creations on this forum
It will make accurate cones with many flat sides, see photos
And does require patience, practice (and accurate templates) to achieve good results
It is cheap, this one used scrap metal shafts, the only parts I purchased new, were the hex head bolts
The shafts should be the largest diameter possible, (the smallest diameter cone will be the factor here) and should be as short as possible, to resist flexing
I milled the grooves because I have access to a mill, they could be made with an angle grinder and patience
Might be of use to someone who has some junk lying around and doesn’t want to lay out cash for a slip roller
Thoughts criticism and opinions are welcome,
Are the many sided cones likely to affect the performance?
More / less harmonics?
I thank you in advance for your time, should you choose to reply
It is a variation on a type of sheet metal folding machine; it will not make beautiful smooth cones, like those used on some of the excellent creations on this forum
It will make accurate cones with many flat sides, see photos
And does require patience, practice (and accurate templates) to achieve good results
It is cheap, this one used scrap metal shafts, the only parts I purchased new, were the hex head bolts
The shafts should be the largest diameter possible, (the smallest diameter cone will be the factor here) and should be as short as possible, to resist flexing
I milled the grooves because I have access to a mill, they could be made with an angle grinder and patience
Might be of use to someone who has some junk lying around and doesn’t want to lay out cash for a slip roller
Thoughts criticism and opinions are welcome,
Are the many sided cones likely to affect the performance?
More / less harmonics?
I thank you in advance for your time, should you choose to reply
- Attachments
-
- IMG_2093.jpg
- (173.3 KiB) Downloaded 226 times
-
- IMG_2095.jpg
- (197.08 KiB) Downloaded 291 times
-
- CONE JIG.pdf
- (3.8 KiB) Downloaded 588 times
-
- Posts: 5007
- Joined: Fri Oct 31, 2003 7:25 am
- Antipspambot question: 0
- Location: santa barbara, CA
- Contact:
-
- Posts: 723
- Joined: Tue May 31, 2005 3:39 am
- Antipspambot question: 0
- Location: Northwest Georgia, USA
VARIATION ON A THEME
I thought it was a nice presentation. With so many facets, it seems to approximate a cone shape very well. How many facets are there on the large cone? Maybe it will have some new characteristic or striped glow when hot.
Presentation is Everything
-
- Posts: 474
- Joined: Mon Jul 30, 2007 2:43 am
- Antipspambot question: 0
- Location: British living in Chile
Hey, thanks to all for taking the time to reply,
There are 20 facets on all the cones both large and small, no particular reason for the number 20; I just hit the divide command until it looked about right.
When the time comes for the glowing part I will post a video,
Thanks to you tube, this forum and Larry Cottrill I now have a mistress in my life,
She cuts and burns my skin, steals my money, and makes my eyes and ears hurt , but I still cant leave her alone , I believe this is called an Obsession ,
But hell am I having fun!
There are 20 facets on all the cones both large and small, no particular reason for the number 20; I just hit the divide command until it looked about right.
When the time comes for the glowing part I will post a video,
Thanks to you tube, this forum and Larry Cottrill I now have a mistress in my life,
She cuts and burns my skin, steals my money, and makes my eyes and ears hurt , but I still cant leave her alone , I believe this is called an Obsession ,
But hell am I having fun!
-
- Posts: 1396
- Joined: Thu Oct 06, 2005 1:34 am
- Antipspambot question: 0
- Location: DEMING NM 88030
Faceted Engine
Looks sort of sharp in its own way! I'm curious on how the facets are going to handle the heat!
Could a faceted cone weigh less then a cylindrical type? Less materials?
Jim
Could a faceted cone weigh less then a cylindrical type? Less materials?
Jim
WHAT TO FRAP, IT WORKED![url=callto://james.a.berquist][/url]
-
- Posts: 474
- Joined: Mon Jul 30, 2007 2:43 am
- Antipspambot question: 0
- Location: British living in Chile
faceted engine
The flat sheet development of the round cone and the faceted cone are identical, so will be equal in weight
I too am curious as to how she will look when hot , will keep you posted
I too am curious as to how she will look when hot , will keep you posted
-
- Posts: 1859
- Joined: Sat Oct 04, 2003 1:17 am
- Antipspambot question: 0
- Location: United States
- Contact:
A round cone will have less surface area and less weight.
That is pretty impressive, though you should be able to free form some pretty nice round cones with that setup there, just wear heavy work gloves and work it to shape, then pound with a mallet if you have to.
The facets look great, you will have a jewel of an engine when you are finished
Eric
That is pretty impressive, though you should be able to free form some pretty nice round cones with that setup there, just wear heavy work gloves and work it to shape, then pound with a mallet if you have to.
The facets look great, you will have a jewel of an engine when you are finished
Eric