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Tools/mig/induction: Difference between revisions
→MIG Welder induction - Level 2
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*** blowing holes in material - MUCH too much voltage
*** Lots of sparks and brown/porous weld - not enough gas or too far away
* Controlling weld distortion
** Metal pulls towards the heat source when it cools and so it pulls in the direction of travel
** You CANNOT prevent distortion, but you can control it.
** Extensive tacking and clamping will help reduce it a bit.
*** Tack a lot, correcting distortion as you go
** Pre-compensation can help
** Bridge blocks on the back of a weld can restrict it a lot
** Order of welds within a joint can be used to help cancel out distortion.
*** Consider the directions of travel, that can provide a degree of compensation.
*** Subsequent welds on the same joint have diminishing effects on distortion because the other welds restrain it
*** Standard sequence for T-joint (alternating directions on opposite sides) and mitered corners. (round the outside, then across the middle)
* Working with thin (1mm) and thick (5mm) materials
* Lap joints of dissimilar thickness and dealing with burn-back issues
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