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Thread: Cut / Guide lines for tubular construction

  1. #1
    Associate Engineer
    Join Date
    Feb 2013
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    2

    Cut / Guide lines for tubular construction

    Alright so I need some help making this process easier…

    Every now and again I find myself working on something involving tubes and it’s always a headache to figure out the line for the cut or for grinding.

    (Example: You have a piece of metal tubing 4cm in diameter and u want to weld it to another piece of metal tubing that measures 6cm in diameter at a 60 degree angle)

    Normally I just eyeball it and grind till I get it close enough but that doesn’t always work out very well. So instead of just getting more frustrated I tried thinking about ways I could come up with a guide… I remembered a process I saw one time dealing with cutting out patterns and templates for a hovercraft skirt. After playing with that idea for awhile I came up with a way to make a guide line that I could wrap around the pipe I was cutting to give me my cut Line.

    (This link should take you to a picture of the process I’m using right now)

    axionan.jpg

    when you’re finished you’ll have a weird looking curve and if you wrap that around the tube your cutting it’ll show you your cut line.

    So here’s the part I need help with… I want to make this process quicker and easier to make it more practical. Ideally I’d like some way of making some sort of simple program that I can just plug in the data and it’ll show me the cut line. Now I’ve looked around online for techniques people use to do this but I haven’t really found anything. So if someone knows of something that would work better that would be great as well.

    Thanks-
    Last edited by Kelly Bramble; 02-25-2013 at 08:38 AM.

  2. #2
    Technical Fellow
    Join Date
    Feb 2011
    Posts
    1,043
    Have you considered a Tubing Notcher?

  3. #3
    Project Engineer CCR5600Design's Avatar
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    Feb 2011
    Location
    Central USA
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    Use your favorite search engine and do a websearch for "tube notcher." There are dozens of designs out there, but my choice is for the type that uses a bi-metal holesaw blade. These blades are reasonably cheap and are offered in a variety of sizes to accomdate most diameters of tubing at pretty much any angle you wish to connect the tubing. The top of the line units feature a jig that can be dialed in to a precise angle of attack for the holesaw blade to achieve a perfect fit every time.


    Ron


    edit: looks like Dave beat me to the punch.

  4. #4
    Associate Engineer
    Join Date
    Feb 2013
    Posts
    2
    thanks guys, I'll check it out.

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