U - Spot Welding to Wave Soldering Flashcards
(42 cards)
welding approach where heat can be generated in a workpiece as a consequence of current flow.
RESISTANCE WELDING
the most well-known RESISTANCE WELDING method; does not create continuous beads, fuses material together only at localized “spots”
SPOT WELDING
welding technique that occurs rapidly and in the small interfacial gap between the sheets, simple to perform, requires minimal PPE, and little operator skills
SPOT WELDING
Since there is very little oxygen available in SPOT WELDING, there is no need for…
- FLUX
- INERT GAS shielding
- FILLER to fill grooves/create a bead
automation that allows for repetitive SPOT WELDS to be performed in 3D space using relatively simple programming
robotic spot welder systems
one way to use resistance welding to create structural fluid-tight joints, essentially spot welding, but with COPPER DISC ELECTRODES as rollers
SEAM WELDING
what does HFRW stand for?
HIGH FREQUENCY RESISTANCE WELDING
a method of resistance welding used in pipe manufacturing, when the pipe is to be constructed from folded sheet metal continuously welded along the seam
HIGH FREQUENCY RESISTANCE WELDING (HFRW)
the addition of this to HFRW increases the inductive reactance of the current path around the inside wall making the outside current larger, and changes the name to HIGH FREQUENCY INDUCTION WELDING
IMPEDER
a resistance welding technique that makes it easier to confine the welding to specific locations and can perform multiple spot-type welds simultaneously
PROJECTION WELDING
what is the difference between ARC and RESISTANCE welding
- both use electrical power
- ARC WELDING demands high voltage
- RESISTANCE WELDING requires high current
2 parts are each connected to an electrode and high voltage is applied (arc), then it is switched to high-current mode (resistance), can weld across an entire surface
FLASH WELDING
same basic technique as FLASH WELDING, but is confined to welding fasteners to a plate.
STUD WELDING
a crude way of welding that requires elevated temps and is obtained indirectly through the use of a furnace or blacksmith’s forge; not very precise, controllable, low joint strength
FORGE WELDING
crude welding method that uses hammering or pressing to fuse the parts together at room temperature, low temp. limits the process to ductile metals
COLD WELDING
modern approach to mechanically welding without an external heat source, 2 surfaces are rubbed together generating frictional heat
ULTRASONIC WELDING
welding process that rubs surfaces together, the friction is not caused by vibrations, but rather by relative rotation, not hot enough to cause melting
FRICTION WELDING
one example of where FRICTION WELDING is used in manufacturing
to attach the stems to valve heads for internal combustion engines
advantages of FRICTION WELDS
- very strong
- fuse across the entire interface area
- no fluxes are needed since the friction and rotation strips and slings the oxide
one of the best innovative welding methods in recent years; involves plunging a stepped rotating tool
FRICTION STIR WELDING
what are the parts in FRICTION STIR WELDING
- LOWER PROBE/PIN - forced along the interface and rotated
- SHOULDER - makes for a flush bead and the process can weld dissimilar metals
another process that can weld dissimilar metals, can weld over large plate areas, not restricted to butt welds; for welding one plate on top of another (CLADDING)
EXPLOSION WELDING
how does EXPLOSION WELDING work?
the upper plate is covered in explosives, the explosives are detonated at one end and progressively slam the upper plate onto the lower plate
welding method that achieves the same result as EXPLOSION WELDING by using a powerful magnetic pulse, avoiding most hazards
MAGNETIC PULSE WELDING (MPW)
