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Old 11-29-2016, 04:04 PM
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Bumper Fixtures

I am a begining fabricator and have been building atv bumpers for a company I work for. I have been building these bumpers off of fixtures I have created. I haven't had really any guidance on it so I don't know if I have been doing it right or not. I have really just been eye balling it. Any insight will help to make my fixtures better.
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Old 11-29-2016, 05:39 PM
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Cameron, it may help if you could post up a couple of examples that you have. Use photo bucket or something like that and then reference the link. I can help with the link if you need it.

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Old 11-29-2016, 05:57 PM
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Old 11-29-2016, 05:58 PM
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Old 11-29-2016, 06:01 PM
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Old 11-29-2016, 06:02 PM
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Old 11-29-2016, 10:28 PM
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Pretty nice fixture! The one in my head has clamps to ensure no movement while welding. But i like the simplicity of yours.
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Old 11-30-2016, 08:47 AM
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Stops for all the tubes and toggle clamps would be my only suggestion. That's a good looking fixture.
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Old 11-30-2016, 03:11 PM
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Great looking jig! Since you asked for advice, I'll offer some input, but take it with a grain of salt - I am just an academic type.

I might describe this as a positioning jig, since it doesn't appear to clamp/fix any of the components in place. Depending on how much distortion you get, that may be just fine, but if you want more control over location, you might consider adding clamps in locations where you need things to stay put. You might also consider making the fixture tilt or rotate to allow welding access on the backsides in flatish position, assuming you are fulling welding the assembly while in the fixture. I noticed in this photo there is some gap at one of the joints; you might consider how the fixture could be modified to snug those joints together while respecting the positions of mounting points. Lastly, it looks like there is not a left-right positioning feature for the main "hoop". You may want to add some stops at either end to ensure it is well centered.
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Old 12-01-2016, 09:11 AM
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One of my questions is would you rather use a half section of pipe or would you use a V block? I am afraid to put clamps on this fixture as it is not very strong and can move around when under tension.
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