Tools/mig/induction: Difference between revisions
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*** blowing holes in material - MUCH too much voltage |
*** blowing holes in material - MUCH too much voltage |
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*** Lots of sparks and brown/porous weld - not enough gas or too far away |
*** Lots of sparks and brown/porous weld - not enough gas or too far away |
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* Controlling weld distortion |
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** Metal pulls towards the heat source when it cools and so it pulls in the direction of travel |
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** You CANNOT prevent distortion, but you can control it. |
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** Extensive tacking and clamping will help reduce it a bit. |
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*** Tack a lot, correcting distortion as you go |
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** Pre-compensation can help |
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** Bridge blocks on the back of a weld can restrict it a lot |
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** Order of welds within a joint can be used to help cancel out distortion. |
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*** Consider the directions of travel, that can provide a degree of compensation. |
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*** Subsequent welds on the same joint have diminishing effects on distortion because the other welds restrain it |
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*** Standard sequence for T-joint (alternating directions on opposite sides) and mitered corners. (round the outside, then across the middle) |
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* Working with thin (1mm) and thick (5mm) materials |
* Working with thin (1mm) and thick (5mm) materials |
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* Lap joints of dissimilar thickness and dealing with burn-back issues |
* Lap joints of dissimilar thickness and dealing with burn-back issues |