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RE : Questions About Bending Brake

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Carlos Sa

Joined: 13 Jan 2006
Posts: 96

Posted: Sat Feb 25, 2006 12:52 pm Post subject: RE : Questions About Bending Brake

Hello, William

I went through that phase myself.

A wooden brake will work well only on thin stock.

I eventualy found a welding shop that built the 4' bending brake for me. 

Actually, I made it longer so I could use it to bend the rudder spar.

Money well spent.



For the longer parts, I rent a bending brake from a shop nearby.

Took me forever to find them, but again, it was worth it.

The parts have a very professional appearence.



The plans for the (48") brake can be found somewhere on http://ch601.org/



Happy building

Carlos

CH601-HD, plans



--- William Dominguez <bill_dom(at)yahoo.com> a crit :



 	  Quote: 	
		   

 

 Does the material have to be flat before bending? Not

 twisted.

 

 Does ZAC 48 brake need welding? Can it be gas welded?

 

 What is the best way to cut .040 thick materials?

 

 Ive been experimenting with a wooden bending brake

 with mixed success. When I bend L angles of .040 and

 40 long it comes out twisted and slightly bowed. The

 material is not flat and it is twisted before bending.

 I have the suspicion that the snips are causing this

 twisting in the material by stretching the border

 while cutting it. If the border is slightly larger

 than the center this may cause the twist and the

 bowing after the bending. My wooden brake is very

 solid and straight and I can't see any bowing or

 twisting of the brake while bending.

 

 

 William Dominguez

 Plansbuilt 601XL


	


	



	

		

Lche-vitrine ou lche-cran ?

magasinage.yahoo.ca

_________________
CH601-HD, plans
Montreal, Canada

bill_dom(at)yahoo.com
Guest

Posted: Sat Feb 25, 2006 2:12 pm Post subject: RE : Questions About Bending Brake

Carlos,



Did the welding shop built the brake from ZAC plans or

from the plans on http://ch601.org/. How much they

charged you.



Thank you,



William Dominguez

Plansbuilt 601XL 



--- Carlos Sa <carlosfsa(at)yahoo.com> wrote:



 	  Quote: 	
		   

 <carlosfsa(at)yahoo.com>

 

 Hello, William

 

 

 I went through that phase myself.

 A wooden brake will work well only on thin stock.

 I eventualy found a welding shop that built the 4'

 bending brake for me. 

 Actually, I made it longer so I could use it to bend

 the rudder spar.

 Money well spent.

 

 For the longer parts, I rent a bending brake from a

 shop nearby.

 Took me forever to find them, but again, it was

 worth it.

 The parts have a very professional appearence.

 

 The plans for the (48") brake can be found somewhere

 on http://ch601.org/

 

 Happy building

 

 

 Carlos

 CH601-HD, plans

zodierocket(at)hsfx.ca
Guest

Posted: Sat Feb 25, 2006 2:29 pm Post subject: RE : Questions About Bending Brake

I'm hoping to have a new set of plans on the www.ch601.org website next

month. This break can be wielded with arc/mig or gas it is 54inches long

and works well. SO far we have made 4 of them.



Mark Townsend  Alma, Ontario

Zodiac 601XL C-GOXL, CH701 just started

www.ch601.org / www.ch701.com / www.Osprey2.com



--

ashontz

Joined: 27 Dec 2006
Posts: 723

Posted: Wed Dec 27, 2006 10:06 am Post subject: Re: RE : Questions About Bending Brake

I have an 8'+ bending brake I made out of 1/4" thick by 3 1/2" steel angle made with the same bending pivot idea as Zenith's brake.  Despite what they say, you can extended that brake to a full 8', you just need to beef it up externally. I can bend .032 no problem. .040 I need a couple extra clamps in the middle, but evereything below .032 is a piece of cake and straight. My brake desing also allows for full depth bending (ie. rudder skin etc...) because the clamp attach points are at the ends, no in the middle. Again, beefing it up externally like a real brake is the key. The brake I have only cost about $300 including the materials for the dolly and doesn't require any special machining operations (no milling, no lathe work). You can make it with a metal cutting band saw, drill press, hand grinder, and assorted basic hand tools. No welding required at the joints either. The only welds I have on it are where the bow tensions are mounted to the bows, and I'm sure something else could be done there too or taken to a welder for $10. Perfect for sheet up to .032 (did my web spars on it, al within 1mm) and good for .040 shallow depth sheet (stiffener L's etc...) with a few extra clamps. No need to file a 1/8 radius either. It was already on the steel by default. Just cleaned up the edge. Truly a handy thing to have around the shop a problem free 8' bending brake for around $300.

Afterfxllc(at)AOL.COM
Guest

Posted: Wed Dec 27, 2006 10:18 am Post subject: RE : Questions About Bending Brake

This concerns me...... You do what you like but this is a very bad and  unsafe practice.

  

  

 In a message dated 12/27/2006 1:12:34 PM Eastern Standard Time,  ashontz(at)nbme.org writes:

  	  Quote: 	
		  No need    to file a 1/8 radius either. It was already on the steel by default. Just    cleaned up the edge.    

	


  [quote][b]

Afterfxllc(at)AOL.COM
Guest

Posted: Wed Dec 27, 2006 10:26 am Post subject: RE : Questions About Bending Brake

Sorry I miss read your post disregard that last post. I thought you  were talking about the radius on the aluminum before you bend it.

  

 Do not archive

  [quote][b]

ashontz

Joined: 27 Dec 2006
Posts: 723

Posted: Wed Dec 27, 2006 10:32 am Post subject: Re: RE : Questions About Bending Brake

[quote="Afterfxllc(at)AOL.COM"]This concerns me...... You do what you like but this is a very bad and  unsafe practice.

  

  

 In a message dated 12/27/2006 1:12:34 PM Eastern Standard Time,  ashontz(at)nbme.org writes:

  	  Quote: 	
		  No need    to file a 1/8 radius either. It was already on the steel by default. Just    cleaned up the edge.    

	


   	  Quote: 	
		  [b] 	




I can take a picture if you like. There was in fact a round edge on it. On all the pieces in fact. If it's 1/4" thick, and the edge is round, it's therefore a 1/8" radius. I just cleaned any rust and high spots off of it before using it. No need to file a 1/8" radius, it was already there. Even Zenith's brake per the plans made a mention of a 1/8" radius already on the steel angle and to just clean it up. I even slid my 1/8" router bit along the edge and it conforms to a 1/8" round edge. You're more likely to run into a problem buying a peice of steel with a square edge and then trying to file it by hand. No guarantee that the edge is truly 1/8" radiused when you're done unlike a cleaned up factory edge.

ashontz

Joined: 27 Dec 2006
Posts: 723

Posted: Wed Dec 27, 2006 10:40 am Post subject: Re: RE : Questions About Bending Brake

[quote="Afterfxllc(at)AOL.COM"]Sorry I miss read your post disregard that last post. I thought you  were talking about the radius on the aluminum before you bend it.

  

 Do not archive

   	  Quote: 	
		  [b] 	




No problem.



Not sure what you're talking about with the aluminum having a radius.



I should pos some pix of my brake. I did a lot of thinking about this when I made it and agonized over it. Not having a good qaulity large brake available to me really put a damper on trying to get started on building a plane in the first place. I'm happy with it. It's worked well and very versatile.

601zv(at)ritternet.com
Guest

Posted: Wed Dec 27, 2006 10:52 am Post subject: RE : Questions About Bending Brake

HUH?

  

 Do not archive.

 [quote]   ---

Afterfxllc(at)aol.com
Guest

Posted: Wed Dec 27, 2006 11:01 am Post subject: RE : Questions About Bending Brake

OK I miss read the post I thought he was talking about a relief filed or  drilled before the bend is made. i thought he said no need for them I missed the  part about the steel edge.

  

  

 do not archive 

  [quote][b]

p.mulwitz(at)worldnet.att
Guest

Posted: Wed Dec 27, 2006 12:18 pm Post subject: RE : Questions About Bending Brake

Hi Robin,



 I don't know what the problem is either.  I did just the same thing on my bending brake - used rounded edge extrusion to set the 1/8" bend radius for all the parts from my brake.



 Paul

 XL fuselage

 do not archive



 At 10:51 AM 12/27/2006, you wrote:

 [quote]HUH?

  

 Do not archive.

   ---

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