Stretching & Shrinking Metal with common Tools
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  1. #1
    Full Time Metal Junkie ProMetalShop's Avatar
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    Stretching & Shrinking Metal with common Tools

    Be warned it may be lengthy...............................
    This will help you make bends and curves in flat metal with common tools.
    This is a 1 inch strip of 18 gauge cold roll 1008 series, notice the bottom that touches the bench is as flat and in full contact....

    Now to create a smooth curve in this we will stretch the the bottom edge.

    I'm holding the metal down on a hard metal surface this don't have to be an anvil it can be a the back of your vice a length of angle iron anything hard enough to stretch with.
    I hit on the very outer edge of the metal which thins it out rapidly,as it thins it spreads out side ways and seeks the least resistance .
    After several hits 20 or 30 or so here are the results.

    They are obvious....

    Now lets go the other way by hammering on the opposite edge.


    Now this is by stretching the outer edge and easily done, but what happens when you want to shrink..........Next
    Last edited by ProMetalShop; 27-12-2009 at 00:15.
    Thanks Steve
    Shaping Metal Is Often Easier Than Shaping Minds

    http://chevylegends.com/forum/index.php

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  3. #2
    Full Time Metal Junkie ProMetalShop's Avatar
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    OK so we know to stretch we have to thin out so to shrink we have to gather.
    Gathering is a tiny bit trickier<--------is that a real word)) to gather you will be thickening the area which will draw the metal from the surounding areas.
    Now to do this with out a shrinker we will have to make a ruffel in our metal.

    I used my vice jaw slightly opened and taped the very edge with the chisel end of my hammer to make a sort of dent, I continued to make a few more.
    Now that I have the ruffels I want to trap them, this was done simply by clamping it to a piece of angle iron so the outer edges can't move back out.

    You can already see the two very outer edges near the clamps have moved closer to each other. Now we need to drive the ruffels back into themselves.
    The important thing is that wwe don't hit them to hard restretching the area.
    I like to do this with a home made slapper.


    sorry for the poor photo but any way the arrows dictate the direction of blows by my slapper. I drive each ruffle which looks like half an icecream cone starting at th pointed end and with side to side slaps they thicken.
    Here are the results.
    Last edited by Roadrunna; 26-12-2009 at 23:48.
    Thanks Steve
    Shaping Metal Is Often Easier Than Shaping Minds

    http://chevylegends.com/forum/index.php

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    Full Time Metal Junkie ProMetalShop's Avatar
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    Now we can step it up a knotch and lets do it with a 90 bend in the panel


    Same as before we are concentrating on the outside edge of the panel.

    You can see results very quickly..................


    This is just one way of moving the metal to fit panels without having to cut and weld. It dose take practice and finding were you have to shrink or stretch is easy to find by using paper, which I will show in another post.....
    Last edited by Roadrunna; 26-12-2009 at 23:48.
    Thanks Steve
    Shaping Metal Is Often Easier Than Shaping Minds

    http://chevylegends.com/forum/index.php

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    THATS MR TATFINK TO YOU TATFINK's Avatar
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    enjoying these posts, thanks alot

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    Two Sauces and a Sausage! 55chev's Avatar
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    Love watchin this stuff being done,you never stop learning,

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    Full Time Metal Junkie ProMetalShop's Avatar
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    Thanks Guys
    I hope that some of this if not all , will help you sometime, during a repair, or even give you that bit of an edge when doing to basic panel work. I really can help you better understand what metal will do when you are using different techniques. Thank you for looking
    Thanks Steve
    Shaping Metal Is Often Easier Than Shaping Minds

    http://chevylegends.com/forum/index.php

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    Official RnS Addict Roadrunna's Avatar
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    Another quality guide Steve.

    Just want to say thanks again for the input you're giving to this site. It's very much appreciated
    Meep Meep.
    My Intro

  10. #8
    Full Time Metal Junkie ProMetalShop's Avatar
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    I enjoy Rods and Sods you have a great site , with lots of great members, Thanks for having me
    Thanks Steve
    Shaping Metal Is Often Easier Than Shaping Minds

    http://chevylegends.com/forum/index.php

  11. #9
    Rods 'n' Sods Junkie 100ev8's Avatar
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    superb . any tips on joining wheel tub top to inner side panel ? i can roll the tubs but cant make my mind up how to join the 2 together .

    rob

  12. #10
    Full Time Metal Junkie ProMetalShop's Avatar
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    Hi Rob
    Well in this photo below:

    you can apply the same method to a larger panel.
    However this does depend on how the inside panel it attaches to whether it folows true or moves in and out .
    I will dig up some examples :

    See how the edge meets flat against the frame rail, thats an edge that runs true threw the whole attachment.

    Were yours may wonder in and out, making it so you have to change the direction of your edge or flange.
    Post a photo if possible , if not I can come up with a good example on how to tip an edge that will follow nicely.
    Last edited by ProMetalShop; 27-12-2009 at 00:30.
    Thanks Steve
    Shaping Metal Is Often Easier Than Shaping Minds

    http://chevylegends.com/forum/index.php

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