MIG & TIG Welding
MIG and TIG welding use an electric arc to melt metal at a joint so two parts fuse into one: MIG feeds a consumable wire through the gun, and TIG holds a tungsten electrode above the joint and adds filler from a separate rod. K-Display welds machine frames, housings, and enclosure corners from your assembly drawing.
What MIG and TIG welding do to a joint
The arc melts the edges of the joint into one molten pool, and the filler metal added to it solidifies behind the arc as the weld. MIG runs faster on longer seams and heavier sections, and TIG gives finer control of heat and bead on thin sheet, visible joints, and stainless steel or aluminum. We weld carbon steel, stainless steel, and aluminum, and supply weldments welded and blended, or powder coated with hardware installed.
Resistance spot welding joins overlapping sheets, a lap joint, at single points with no filler or shielding gas, which suits stiffeners where the electrodes can reach both sides of the joint.
Shielding gas surrounds each arc, so the pool is not exposed to air as it solidifies. The weld trail forms behind the pool, so the joint is finished only where the arc has already passed.
Parts we weld
MIG or TIG welding fits joints that need a continuous bead, such as corners, seams, and joints reachable from one side. Choose resistance spot welding for overlapping sheets joined at repeated points.
- Machine frames of cut plate and formed channel, welded at every corner
- Enclosure bodies with a continuous seam weld along each visible corner
- Hoppers and chutes with seams welded along their length
- Gussets and mounting plates welded to frames and bases
- Materials
- Carbon steel, Stainless steel, Aluminum
- Production fit
- Prototype, short-run, and repeat-production fit is reviewed with the drawing package.
Welding to the finished surface
Powder coat does not hide a weld bead, so the welds on visible faces are blended before the part goes to the coating line.
Weld the joints
We weld each joint in MIG or TIG, the process your drawing names or the one we recommend for the material and the joint.
Blend the visible welds
We blend or grind flush the welds on the faces the drawing marks as visible, and leave the others as welded.
Finish the weldment
Weldments leave welded and blended, or continue to powder coating, hardware installation, and assembly.
Design for welding
We weld each joint from the side its weld symbol names, and the torch needs a clear approach to that side. An inside corner closes off once the lid or a neighboring wall is fitted, so draw the parts so the corner stays open to the torch.
A weld left as welded stands proud of the metal beside it, which shows on a visible face and holds a mating part off. Mark those faces on the drawing, and we blend the welds there.
With the lid lifted, the torch reaches the rear inside corner from above. The bead stops below the mounting flange, so the flange and its lid holes stay clear of it.
What to send for a MIG and TIG welding quote
- Weldment drawing
- Assembly model or drawing with current revision and critical dimensions.
- Material
- Type, grade, thickness, and any existing coating.
- Weld symbols
- AWS A2.4 symbols giving type, side, size, length, and pitch at each joint.
- Visible faces
- Cosmetic faces, and whether welds stay as welded or are blended flush.
- Code requirements
- Any inspection or code criteria the weld must meet.
- Quantity
- Quantity per order and the delivery date.