Announcement

Collapse
No announcement yet.

Angle cuts (miter)

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • Angle cuts (miter)

    Was just kind of wondering. As many of you know, my work generally consists of interior and exterior railing work. I can't remember the last time I made a non-miter box weld/connection. I even do this with non-rail work. I guess it would be best to say I miter all my corner/box welds. I noticed on many project photos I have viewed here that most welds are straight "framing" welds. In any event, I know that (well I think I know?) because of the greater angle there is more weld surface on a miter welder hence, providing a stronger weld. I never really did it for greater strength as I did it for greater looks. I guess?

    Your experience with miter welds?.......please..

    TacMig
    We depend On:
    Miller | Esab | Lincoln | Fronius
    Baileigh | Drake | Eagle | Knuth
    Victor | Harris | Smith | Bessey
    Snap-On | Hilti | Ingersoll Rand
    Burco/Koco | Onan | BobCat
    Tracker | Infratrol | AmeriCast

    We belong to or support:
    American National Standards Institute
    American Welding Society
    The Welding Institute
    Fabricators & Manufacturing Association Int'l.

    Anderson & Co. LLC
    Metal Cr
    afters

  • #2
    i have to mitre every corner and cope the rest of the joints together. i get sick of cutting mitres and getting them to fit. i havent found a chop saw yet that will cut consistently at 45 angles.
    welder_one

    nothing fancy, just a few hot glue guns for metal
    www.sicfabrications.com

    Comment


    • #3
      I miter nearly all of my angled joints. The ones that I weld straight I box the tubing first. I too would love to find a saw that accurately cuts 45s. I have been using a Dewalt multicutter, which is much better than an abrasive, but still leaves somthing to be desired. I am generally tolerant of 1/16"+-, but usually get +- 1/32ish".
      Also, while on the topic, how do you mark your tubing to cut the miter? I generally have outside measurements, and so cut one 45 then mark outside measurement on the tube then transfer the mark to the top with a tri square. The only thing that makes this a problem is the round corner of the tubing. On 1" its not too bad, but a piece of 4X4 has 1/4" or more of a round edge to guess at. I have thought of making a purpose built gauge that surrounded two sides of the tubing, was square on the outside and 45 on the top to make it easier, but have not yet.
      Any ideas?

      Comment


      • #4
        i just got done building a skirt frame for our salter at work (should have some pics up this weekend if anyone is interested)

        i had to bring in my own abbrasive chop saw to be able to 45 the angle so it would turn out to be a cleaner peice.. and i feel 45's seem to give a structure more strength and stability..and your right.. sure do look way better ...

        my problem is that my cheepy ryobi home depot special chopsaw is..well..rather cheep and i get alot of deflection and imperfect cuts when running her at 45... ESPECIALLY with angle... i should upgrade to a better model.. maybe a rigid.. or save up for one of them drake cold coolant cutin chop saws.. (1K worth of saw) or a nice miterable band saw would be nice too

        ill get them pics up sat. morning when i get out a 7AM

        Comment


        • #5
          I bought a used cold saw. It cuts great, real accurate. I use a 315mm diameter blade on it but I cannot remember if it will 45 a 4x4 tube. I think it will.
          Tim Beeker,
          T-N-J Industries
          (my side bussiness)

          Miller Synchrowave 350LX with tigrunner
          Esab 450i with wire feeder
          HH135 mig
          Thermal Dynamics cutmaster 51 plasma cutter
          Miller aircrafter 330 - sold
          Marathon 315mm coldsaw
          vertical and horizontal band saws
          table saw
          Dewalt cut off saw
          Sand blast cabinet
          lots of hand grinders
          Harris torch
          beer fridge

          Comment


          • #6
            Walker - I use my rafter square for marking all my 45 degree mitres. It has the advantage of a shoulder that overcomes the rounded edge. The link below is not the one I have but you can get the idea. I have both a 7" and a 12" version.

            I also use this to set my chop saw as close to 45 as possible.

            http://www.houseoftools.com/product.htm?pid=205046

            Come to think of it - of all the tools in my collection - this is one of the most used. I use it any time I'm cutting or measuring - wood or metal.

            Comment


            • #7
              The trusty Speed Square is your friend...
              I have several, because I'm always reaching for one.

              Comment


              • #8
                For Aluminum, I use a delta compound miter saw. It will cut to about 3"x3" with 98% accuracy.

                For steel, I use my HBS. Its not so accurate so i get out the square. Its the only way ive found so far.

                Alternately, if you have the option to do layups, you can jig everything as close to "square" and tac it all in place then do the final welding..

                I miter eveything I can if it warrants mitering. Im not much of a fan of the ugly framing look. case and point is the outboard engine stand I just built.
                Its not mitered and there are places where a wrench or nuts 'n' bolts could fall into and be unretrievable until the engine is off the stand. I will seal these up shortly but, it would have been nice to have mitered it all. I was in a hurry to make this thing so... Oh well cant have everything.
                Will it weld? I loooove electricity!

                Miller 251/30A spool
                Syncro200
                Spectrum 625
                O/A
                Precix 5x10 CNC Router12"Z
                Standard modern lathe
                Cheap Chinese mill that does the trick... sort of...
                horizontal 7x12 bandsaw
                Roland XC540 PRO III
                54" laminator
                hammer and screwdriver (most used)
                little dog
                pooper scooper (2nd most used...)

                Comment


                • #9
                  Cutting 45's

                  We do most our fab in the shop and use our lowboy wet-bandsaw for all our miters and finish them with our upright sanders. If you guys are using chop saws for your miters you may want to invest in a good table or upright sander. I don't think we could do with out ours. We have adjusted the table fence for 100% accurate finishes. Works great. We to use chop saws (Dewalt, Hilti has yet to make one)) for field work and without the sanders to finish off the cuts it puts us up against it at times. A little extra weld metal and a lot of grinding!

                  TacMig
                  We depend On:
                  Miller | Esab | Lincoln | Fronius
                  Baileigh | Drake | Eagle | Knuth
                  Victor | Harris | Smith | Bessey
                  Snap-On | Hilti | Ingersoll Rand
                  Burco/Koco | Onan | BobCat
                  Tracker | Infratrol | AmeriCast

                  We belong to or support:
                  American National Standards Institute
                  American Welding Society
                  The Welding Institute
                  Fabricators & Manufacturing Association Int'l.

                  Anderson & Co. LLC
                  Metal Cr
                  afters

                  Comment


                  • #10
                    Originally posted by walker View Post
                    Also, while on the topic, how do you mark your tubing to cut the miter? I generally have outside measurements, and so cut one 45 then mark outside measurement on the tube then transfer the mark to the top with a tri square. The only thing that makes this a problem is the round corner of the tubing. On 1" its not too bad, but a piece of 4X4 has 1/4" or more of a round edge to guess at. I have thought of making a purpose built gauge that surrounded two sides of the tubing, was square on the outside and 45 on the top to make it easier, but have not yet.
                    Any ideas?
                    We use a chop saw and I agree it's not great but we also use quickfab elbows where we don't want to be worried about the round edge of the tube. the elbow matches the tube and comes with a bevel so it eliminates grinding also.

                    Comment


                    • #11
                      at the shop i work at we used a wet cut band saw, or a dewalt chopsaw with the carbide blade. they both make angled cuts so much easier than a normal abrasive blade chop saw. i think i saw a dry cut bandsaw and harbor freight for about $100 too.

                      Comment


                      • #12
                        Ahhhh speed/rafter square it is! I don't know why I didn't think of that, probably because I don't have one. I'll pick one up at the hardware store today.
                        I also like the sander idea for even better accuracy. I had been checking the miters with a tri sqaure, marking them, and sanding true with a grinder.
                        I have a fairly big furniture project coming up for a client that this will come in very handy for.
                        And, BTW sorry if I hi-jacked the original thread.

                        Shot, the abrasive saws are all inaccurate, due to blade deflection, not just the cheap ones. I have found that the fiber reinforced wheels are a wee bit more accurate that the regular ones, but they cost a little more.
                        Last edited by walker; 12-01-2007, 05:06 PM.

                        Comment


                        • #13
                          Cold saw....
                          Tim Beeker,
                          T-N-J Industries
                          (my side bussiness)

                          Miller Synchrowave 350LX with tigrunner
                          Esab 450i with wire feeder
                          HH135 mig
                          Thermal Dynamics cutmaster 51 plasma cutter
                          Miller aircrafter 330 - sold
                          Marathon 315mm coldsaw
                          vertical and horizontal band saws
                          table saw
                          Dewalt cut off saw
                          Sand blast cabinet
                          lots of hand grinders
                          Harris torch
                          beer fridge

                          Comment

                          Working...
                          X