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Let's see some sheet metal shaping

Discussion in 'The Hokey Ass Message Board' started by jhnarial, Sep 16, 2008.

  1. cornfieldcustoms
    Joined: Feb 2, 2008
    Posts: 796

    cornfieldcustoms
    Member

    been working on some air plane parts the past couple days. i am teaching a class for a couple guys from the US air force museum Wright Patterson restoration department so i wanted to get familiar with some air craft stuff

    going to make some pieces for a B-17 bomber engine cowl

    making the paper patter

    [​IMG]

    after some shrinking and stretching

    [​IMG]

    [​IMG]

    after some blending and and forming

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    shining up nice while working on planishing the panel out

    [​IMG]

    working on a little reverse curve section of a wing fairing

    [​IMG]

    [​IMG]

    [​IMG]
     
  2. THE FRENCHTOWN FLYER
    Joined: Jun 6, 2007
    Posts: 2,755

    THE FRENCHTOWN FLYER
    Member
    from FRENCHTOWN

  3. car doctor
    Joined: May 25, 2011
    Posts: 454

    car doctor
    ALLIANCE MEMBER

    14894509641931588976588.jpg IMG_20180610_131105.jpg IMG_20180610_125659.jpg IMG_20180610_125508.jpg IMG_20180610_125643.jpg IMG_20180610_131521.jpg Rear corner fill in piece for my 32 hi-boy and floor, running boards and rear roll pan for my Willy's pick-up. Also rear window garnish moulding for the willys
     
    Last edited: Jun 10, 2018
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  4. chop job
    Joined: Feb 16, 2013
    Posts: 470

    chop job
    Member
    from Wisconsin
    1. WISCONSON HAMBERS

    Nice work on that floor.
     
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  6. Marty Strode
    Joined: Apr 28, 2011
    Posts: 4,085

    Marty Strode
    Member

    Air intake scoop for Bonneville Lakester. I will posts pics when I get it mounted. IMG_1771.JPG IMG_1772.JPG IMG_1780.JPG IMG_1783.JPG IMG_1808.JPG IMG_1809.JPG IMG_1810.JPG IMG_1811.JPG IMG_1812.JPG
     
  7. Joe McGlynn
    Joined: Jul 14, 2016
    Posts: 80

    Joe McGlynn

    Very Nice! What was your process? Looks like a lancaster-style shrinker along the edges that get welded and wheeling to raise the sides?

    The round stock at the front gives it a really nicely finished edge.
     
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  8. That looks really nice great work Marty thank you for sharing how you made it. Hobo Jim
     
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  9. Marty Strode
    Joined: Apr 28, 2011
    Posts: 4,085

    Marty Strode
    Member

    I started tuck shrinking and getting the general shape on the stump, with my modified softball bat, followed by using a slapper on a dome. Then came the wheeling to finalize the shape and roll out the lumps. IMG_1360.JPG
     
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  10. alwaysamopar
    Joined: Oct 2, 2015
    Posts: 117

    alwaysamopar

    So much talent here. Thanks for posting processes and pics.

    Sent from my SM-G900V using The H.A.M.B. mobile app
     
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  11. Fabber McGee
    Joined: Nov 22, 2013
    Posts: 759

    Fabber McGee
    Member

    Wow, I thought that scoop was a lot bigger than it is until I noticed the spring clamp. Must only be 6 or 7 inches tall, huh?
     
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  12. Marty Strode
    Joined: Apr 28, 2011
    Posts: 4,085

    Marty Strode
    Member

    Good guess, it's 7" tall and 11" long. I am working on the base right now, pics to come.
     
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  13. oj
    Joined: Jul 27, 2008
    Posts: 6,155

    oj
    Member

    Sometimes things fall into place and I thought I'd take a pic. 010.JPG 002 (4).JPG
     
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  14. Dino 64
    Joined: Jul 13, 2012
    Posts: 1,722

    Dino 64
    Member
    from Virginia

    Lookin good OJ
     
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  15. CoolHand
    Joined: Aug 31, 2007
    Posts: 1,917

    CoolHand
    Alliance Vendor

    Damned fine result, sir.
     
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  16. oj
    Joined: Jul 27, 2008
    Posts: 6,155

    oj
    Member

    Thanks, I'm welding it in right now and developing the piece that goes to the front. But I really was astonished when I set that big panel in there and just those two little clamps held it pefect, I thought 'goddamn' and took the pic.
     
  17. CoolHand
    Joined: Aug 31, 2007
    Posts: 1,917

    CoolHand
    Alliance Vendor

    If at first you do succeed, try to hide your astonishment. ;)
     
  18. toreadorxlt
    Joined: Feb 27, 2008
    Posts: 734

    toreadorxlt
    Member
    from Nashua, NH

    Built me a power hammer and heres the first panel off of it. Still so much to learn, looking forward to it. 2.jpg 1a.jpg skin.jpg
     
  19. Nice work Steve! You should turn out some nice panels with that!
     
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  20. CoolHand
    Joined: Aug 31, 2007
    Posts: 1,917

    CoolHand
    Alliance Vendor

    VERY nicely done, sir.

    You've definitely got some hours in fabricating that beast.

    Excellent result.
     
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  21. mgermca
    Joined: Mar 2, 2008
    Posts: 193

    mgermca
    Member

    Steve Shepard you do cool shit. ;)
     
  22. Never2low
    Joined: Jan 14, 2008
    Posts: 1,097

    Never2low
    ALLIANCE MEMBER

    Sweet Jebus!:eek:
     
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  24. patsurf
    Joined: Jan 18, 2018
    Posts: 249

    patsurf

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  25. toreadorxlt
    Joined: Feb 27, 2008
    Posts: 734

    toreadorxlt
    Member
    from Nashua, NH

    Thank you for the nice words everybody.


    Here’s a very quick video of it running.
     
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  27. bundoc bob
    Joined: Dec 31, 2015
    Posts: 104

    bundoc bob

    This is surely the place where artisans hang out. So much skill and
    pushing of the envelope. The mention of B-17s earlier jogged my memory
    of an old, WW2 era aircraft fuselage building book [sadly lost forever now] that had quite a bit about rubber block die forming, where a wooden pattern was covered by a suitable size/gauge of aluminum sheet in a press and a thick block of fairly hard rubber was lowered over it and pressure was applied. Anybody ever tried this?
     
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  28. MP&C
    Joined: Jan 11, 2008
    Posts: 2,199

    MP&C
    Member

    I have a couple radius bends to do in fabricating an AC condenser bracket, so a piece of 1/2" 4130 was added to the Magnetic Brake die.. This will help keep things from moving, and it is welded on what is usually the back side, so no interference otherwise...

    This will be the mounting flange to the radiator..

    [​IMG]

    [​IMG]

    1" rod is used to form the radius on the side "covers"

    [​IMG]

    A test fit before we cut out the gaping hole for air flow....



    The center hole is cut out and a flange tipped for wrapping a 3/16" rod for wire edge. This should add plenty of strength, if the 16 GA wasn't enough..

    [​IMG]

    Our anvil we made up for stretching the metal in the corners for tipping..

    [​IMG]


    A "rough" demonstration of how the corners are stretched/tipped for the wired edge. Sorry for the sound issues, the iPhone seems to want to do a noise cancellation throughout filming.... :mad:




    [​IMG]



    Wire edging complete:


    [​IMG]



    [​IMG]
     
    Last edited: Nov 23, 2018
  29. Robert , love that little hammer ! Great work as usual . Blue
     
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  30. MP&C
    Joined: Jan 11, 2008
    Posts: 2,199

    MP&C
    Member

    It does a nice job of stretching areas like that corner. An eBay find, iirc.
     
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