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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#1
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bending aluminum frames for window screens
On Saturday, June 23, 2001 at 7:03:48 PM UTC-4, pp wrote:
What about filling the rails with fine dry sand packing it reasonably tight and wrapping it around the shape you want. This normally prevents those ugly creases that always ruin your day. Paul P " wrote: i have several arch windows in the front of my house. i would like to put some Solar Screens on them but cannot find a source for the aluminum frams with arched windows that are pre bendt into an arch. i was quoted a price from one shop, well not really a quote, he told me that he has to pay $70 for just the arch as he does not have a machine for bending the frame. the aluminum frames are .020 aluminum and am willing to ruin a few to try it, does anyone know if i can take a piece of plywood, say 2 feet by 3 feet with some rollers on it like maybe one on bottom and two on top for rollers(made out of metal and just push then frames of aluminum through them a few times and bend it into an arch with enough passes? or can someone think of another way of doing it without paying for the $70 prebendt rails? the rails cost about $3 at home depot and the meaterials for the whole thing will be about $100.00 as i plan on doing it all myself, but with the $70 each for the bendt rails it will be over $400 total, i dont think this job is worth $300 labor..... any suggestions on bending the rails????? i tried to bend one by hand to see how far it would bend, it made some nasty creases as the rails are hollow with a cavity infront of it for the spline to go into... any help will be appreciated.... thanks in advance for a answer... What about installing the spline in the channel, without the screen, to hold the shape while bending? |
#2
Posted to rec.crafts.metalworking
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bending aluminum frames for window screens
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#3
Posted to rec.crafts.metalworking
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bending aluminum frames for window screens
On Mon, 27 May 2019 17:19:56 -0400, Clare Snyder wrote:
On Mon, 27 May 2019 09:50:02 -0700 (PDT), wrote: On Saturday, June 23, 2001 at 7:03:48 PM UTC-4, Paul P wrote: What about filling the rails with fine dry sand packing it reasonably tight and wrapping it around the shape you want. This normally prevents those ugly creases that always ruin your day. " wrote: i have several arch windows in the front of my house. i would like to put some Solar Screens on them but cannot find a source for the aluminum frams with arched windows that are pre bendt into an arch. i was quoted a price from one shop, well not really a quote, he told me that he has to pay $70 for just the arch as he does not have a machine for bending the frame. the aluminum frames are .020 aluminum and am willing to ruin a few to try it, does anyone know if i can take a piece of plywood, say 2 feet by 3 feet with some rollers on it like maybe one on bottom and two on top for rollers(made out of metal and just push then frames of aluminum through them a few times and bend it into an arch with enough passes? or can someone think of another way of doing it without paying for the $70 prebendt rails? the rails cost about $3 at home depot and the meaterials for the whole thing will be about $100.00 as i plan on doing it all myself, but with the $70 each for the bendt rails it will be over $400 total, i dont think this job is worth $300 labor..... any suggestions on bending the rails????? i tried to bend one by hand to see how far it would bend, it made some nasty creases as the rails are hollow with a cavity infront of it for the spline to go into... What about installing the spline in the channel, without the screen, to hold the shape while bending? To do it with a roller you will need a roller formed to the profile of the lip for the moveabler roller and some way to keep the profile from swelling when it is bent - basically you need to clamp the frame to maintain the maximum thickness. Would help too if you were running annealed material, not material work-hardened by the initial manufacturing process. If using "mill finish" you could anneal it - but not using pre-finished. The rails mentioned in OP probably are extrusions, likely to be fairly soft rather than work-hardened. Annealing might not make any difference. That aside, the bend probably is in the plane of the widest faces of the rails. Without the profile shape holding that you mention, the success rate might be closer to 0% than 20% There's a reason the darn things are $70 a bend. With your $100 bodged together roller bender your success rate MIGHT be 20% - one in 5 successful. Doesn't take long to make the ready-bent ones look like a bargoon. -- jiw |
#4
Posted to rec.crafts.metalworking
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bending aluminum frames for window screens
On Tue, 28 May 2019 00:36:33 -0000 (UTC), James Waldby
wrote: On Mon, 27 May 2019 17:19:56 -0400, Clare Snyder wrote: On Mon, 27 May 2019 09:50:02 -0700 (PDT), wrote: On Saturday, June 23, 2001 at 7:03:48 PM UTC-4, Paul P wrote: What about filling the rails with fine dry sand packing it reasonably tight and wrapping it around the shape you want. This normally prevents those ugly creases that always ruin your day. " wrote: i have several arch windows in the front of my house. i would like to put some Solar Screens on them but cannot find a source for the aluminum frams with arched windows that are pre bendt into an arch. i was quoted a price from one shop, well not really a quote, he told me that he has to pay $70 for just the arch as he does not have a machine for bending the frame. the aluminum frames are .020 aluminum and am willing to ruin a few to try it, does anyone know if i can take a piece of plywood, say 2 feet by 3 feet with some rollers on it like maybe one on bottom and two on top for rollers(made out of metal and just push then frames of aluminum through them a few times and bend it into an arch with enough passes? or can someone think of another way of doing it without paying for the $70 prebendt rails? the rails cost about $3 at home depot and the meaterials for the whole thing will be about $100.00 as i plan on doing it all myself, but with the $70 each for the bendt rails it will be over $400 total, i dont think this job is worth $300 labor..... any suggestions on bending the rails????? i tried to bend one by hand to see how far it would bend, it made some nasty creases as the rails are hollow with a cavity infront of it for the spline to go into... What about installing the spline in the channel, without the screen, to hold the shape while bending? To do it with a roller you will need a roller formed to the profile of the lip for the moveabler roller and some way to keep the profile from swelling when it is bent - basically you need to clamp the frame to maintain the maximum thickness. Would help too if you were running annealed material, not material work-hardened by the initial manufacturing process. If using "mill finish" you could anneal it - but not using pre-finished. The rails mentioned in OP probably are extrusions, likely to be fairly soft rather than work-hardened. Annealing might not make any difference. That aside, the bend probably is in the plane of the widest faces of the rails. Without the profile shape holding that you mention, the success rate might be closer to 0% than 20% Have never seen an extruded screen frame. spent 3 years in the window business. They are virtually ALL roll formed from sheet stock with a crimped seam. Work hardened pretty good. NOT easy to bend without kinking. There's a reason the darn things are $70 a bend. With your $100 bodged together roller bender your success rate MIGHT be 20% - one in 5 successful. Doesn't take long to make the ready-bent ones look like a bargoon. |
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