Not normally my thing (most of my work is AC) but I've agreed to weld up a fabricated stainless sheet steel sump for a 200sx motor.
The flange plate is 8mm stainless, the 'tub' is 1.6mm stainless. Customer brought it to me as a fully tacked assembly with good tight joints.
Knowing that being stainless it will likely twist and bend a lot I clamped it down to a 10mm MS plate and welded up the outer corners of the tub section but not the main flange (that was left tacked). It did of course pull horrendously even bending the plate it was clamped to. Im sure there may have been a preferred method of welding to minimise this but as I say experience is somewhat lacking here.
Anyway, I cut the tacks off the flange which allowed that to spring back flat and I then linished the joining faces of the sheet steel tub back to flat. So I now have a reasonably tight join to fully weld to join the tub back to the flange. The tub sits ontop of the flange not 'into' it.
So before I attempt this weld are there any pointers? Would you weld internally or externally? if internal obviously it cant be clamped down - but maybe wont pull the flange upwards like an outside fillet weld will? What sort of technique in terms of weld durations, stitch welding in stages, allowing to cool etc?
Apologies I haven't posted any pics, if I get chance I will.
The flange plate is 8mm stainless, the 'tub' is 1.6mm stainless. Customer brought it to me as a fully tacked assembly with good tight joints.
Knowing that being stainless it will likely twist and bend a lot I clamped it down to a 10mm MS plate and welded up the outer corners of the tub section but not the main flange (that was left tacked). It did of course pull horrendously even bending the plate it was clamped to. Im sure there may have been a preferred method of welding to minimise this but as I say experience is somewhat lacking here.
Anyway, I cut the tacks off the flange which allowed that to spring back flat and I then linished the joining faces of the sheet steel tub back to flat. So I now have a reasonably tight join to fully weld to join the tub back to the flange. The tub sits ontop of the flange not 'into' it.
So before I attempt this weld are there any pointers? Would you weld internally or externally? if internal obviously it cant be clamped down - but maybe wont pull the flange upwards like an outside fillet weld will? What sort of technique in terms of weld durations, stitch welding in stages, allowing to cool etc?
Apologies I haven't posted any pics, if I get chance I will.
how the other side live
