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11th October 2014, 12:48 PM #16Novice
- Join Date
- Feb 2012
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- Sydney
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- 19
I have one of the Hare & Forbes angle vice clamps, AC-100, which I bought for $90 at one of their sales. Just checked it now for square and it's spot on. Maybe I was just lucky? It's a heavy casting and I don't always use it for corners but it certainly won't flex. If I'm building SHS frames, I'll generally clamp the pieces to my welding table, use magnetic 90s to tack corners and do a final check everywhere for squareness before completing the welds. I certainly discovered that cutting 45 degree mitres on SHS in the bandsaw didn't result in 90 degree corners when assembled. As my Tafe welding teacher used to remind us, MIGs are great for filling.
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11th October 2014 12:48 PM # ADSGoogle Adsense Advertisement
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11th October 2014, 08:43 PM #17SENIOR MEMBER
- Join Date
- Jun 2010
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- Canberra
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- 769
I snubbed the Hare and Forbes unit only 'cause the casting in the catalogue picture looked very similar to the Gasweld units, and if I was going to the trouble of ordering one, I might as well make sure it's a good-un. Have you checked your clamp to see if it's flat as well?
My theory is that they give the base of the unit a quick grind then flip it over and clamp it to a mill - if the grind isn't over the whole base, it's quite possible the vice flexes when clamped, so any machining will be out once the vice flexes back when released.
If I take the time to set the angle on the bandsaw, it does a very respectable 45, but then you've got to take the time to set it square again - I've seen an end-stop mod for my saw which stops the fence when it's back to square which I'll have to add at some point.
All that said, any gap just means full penetration
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11th October 2014, 10:24 PM #18GOLD MEMBER
- Join Date
- May 2011
- Location
- Murray Bridge SA
- Posts
- 3,339
I made a mitre block from 50 X 8 mm flat at 45deg with a nut welded on for a stop bar, it stops against the fixed jaw, leaving the jaws square all the time.
Kryn
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11th October 2014, 11:50 PM #19GOLD MEMBER
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- Sep 2010
- Location
- Lebrina
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- 1,099
Funny you mention that.
A workshop that I help out in occasionally upgraded from the Makita abrasive saw or hand cut miters with 1mm discs, to a Brobo cold saw. As anyone who has had experience with cold saws will tell you, they are so accurate that you can pretty much weld up a miter without checking it for square. Anyway, tray for the new work bus was built using said cold saw. After welding, the flap disc got a run to make everything was blended for painting. The proud fabricator was standing back admiring his work and proclaiming his greatness, until some lousy sod, (ME), pointed out that there was a line on every miter where the components met. So perfect was the fit up that effectively no penetration occurred on the joints.
Sometimes "have wire, will fill" isn't so bad after all.
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12th October 2014, 10:01 AM #20SENIOR MEMBER
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- Jun 2010
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- Canberra
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- 769
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13th October 2014, 07:59 PM #21SENIOR MEMBER
- Join Date
- Aug 2012
- Location
- Australia
- Posts
- 521
I used my Strong Hand 2 axis angle clamp for the first time on the weekend. It kept things really nice and square. Surprisingly square given I TIG welded this at 230 amps. I really enjoy the flow at max amps on 6mm mild. As a side note, I welded the corner joints from the inside. I guess I could have beveled them back and welded both directions. The rest of the frame is welded from both sides even though the joint penetration was good.
I would really like one of those Strong Hand setup tables!
IMG_1210.jpg IMG_1211.jpg IMG_1218.jpg
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13th October 2014, 09:39 PM #22GOLD MEMBER
- Join Date
- May 2011
- Location
- Murray Bridge SA
- Posts
- 3,339
I would love to put up a photo, but unfortunately I'm TC (Technically Challenged), Neil DieSensei was around here one day on his epic journey and was going to show me how to do it, but WE forgot all about it. So if anyone could ABC it for me, I will, as I have a few that I would like to put up.
Hopefully have found a thread on how to do it.
KrynLast edited by KBs PensNmore; 13th October 2014 at 10:59 PM. Reason: Found a thread
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13th October 2014, 11:16 PM #23
Talk to this company, http://www.weldingtables.com.au/ . I bought one of the full size tables (http://www.weldingtables.com.au/shop...-welding-table) from him and he's very helpful and easy to talk to.
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