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Longeron bender

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naumuk(at)alltel.net
Guest

Posted: Mon Mar 12, 2007 2:57 pm Post subject: Longeron bender

All-

     Wow! This is the way things  should work- tons of ideas rather than locked and loaded flamethrowers! The main  points are: 

     1. What's the sense of the wood  template if all you're using it for is to check the final bend?

     2. Larry Mac's jig makes sense  from a physics standpoint. An HF bender is ideal if you want to spend the money  (Or find a place to store it, in my case).

     3. You have to make sure the  bend occurs perpendicular to the workbench or you induce an axial  twist.

     Here's my basic idea- feel free  to chime in-

     1. Cut the center chunk of the  template (Between the straight parts) out of 2x4.

     2. Cut a kerf on the top  and bottom of your little template the thickness and width of the  L.

     3. Set the rollers of  Larry's jig maybe 10mm outboard of the 850mm on the left side of the template  and the 100mm on the right side of the template. 

     4. Use a c-clamp to drive  the template into the L angle. You might have to do a little tweaking, but  not much.

     Thoughts? 

     

 Bill Naumuk

HDS Fuse/Corvair

Townville,  Pa

   [quote][b]

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larry(at)macsmachine.com
Guest

Posted: Mon Mar 12, 2007 3:59 pm Post subject: Longeron bender

Hi Bill,

If you have the template as nothing more than a left and right line on 

the table, you're there.  Just bend the thing and you'll find out that 

you'll have it

done in less than 30 minutes both sides including adjustments.  A 

template can be flipped to assure symmetry.  Just pushing into a 

template will leave

you with a need for another 10 degrees or more.  Easier to bend just a 

little bit at a time to come up on a line or template.



Larry McFarland at www.macsmachine.com

do not archive



Bill Naumuk wrote:

 	  Quote: 	
		   All-

     Wow! This is the way things should work- tons of ideas rather than 

 locked and loaded flamethrowers! The main points are: 

     1. What's the sense of the wood template if all you're using it 

 for is to check the final bend?

     2. Larry Mac's jig makes sense from a physics standpoint. An HF 

 bender is ideal if you want to spend the money (Or find a place to 

 store it, in my case).

     3. You have to make sure the bend occurs perpendicular to the 

 workbench or you induce an axial twist.

     Here's my basic idea- feel free to chime in-

     1. Cut the center chunk of the template (Between the straight 

 parts) out of 2x4.

     2. Cut a kerf on the top and bottom of your little template the 

 thickness and width of the L.

     3. Set the rollers of Larry's jig maybe 10mm outboard of the 850mm 

 on the left side of the template and the 100mm on the right side of 

 the template.

     4. Use a c-clamp to drive the template into the L angle. You might 

 have to do a little tweaking, but not much.

     Thoughts? 

    

 Bill Naumuk

 HDS Fuse/Corvair

 Townville, Pa

 *

 *

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naumuk(at)alltel.net
Guest

Posted: Mon Mar 12, 2007 4:20 pm Post subject: Longeron bender

Larry-

    In other words, I'm making it more complicated than necessary. I have 

some 10' long cardboard I can draw the template on and blew $4 on the 

components to build your jig. Guess I'm committed now!

                                    do not archive

Bill Naumuk

HDS Fuse/Corvair

Townville, Pa

---

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Ron Lendon

Joined: 10 Jan 2006
Posts: 685
Location: Clinton Twp., MI

Posted: Mon Mar 12, 2007 6:05 pm Post subject: Re: Longeron bender

Thats the way to do it Bill.  Metal has spring back and always needs to be bent a little farther than the final result.  Do as Larry says, sneak up on it a little at a time.  That setup will give you the control you need.

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_________________
Ron Lendon
WW Corvair with Roy's Garage 5th bearing
CH 601 XLB
N601LT - Flying
http://www.mykitlog.com/rlendon
Corvair Engine Prints:
https://sites.google.com/site/corvairenginedata/

naumuk(at)alltel.net
Guest

Posted: Tue Mar 13, 2007 2:41 pm Post subject: Longeron bender

Ron+All-

    I'm not reinventing the wheel, I'm trying to combine the good points of 

different ways to do something while avoiding the bad. The main thing is, 

I'm pleased about all the ideas. I'll wind up with a jig that's a 

combination of what's been done in the past with a smidgen of my own input.

                                do not archive



Bill Naumuk

HDS Fuse/Corvair

Townville, Pa

---

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