#Multiple choice question
#WELDING
#Resistance
#SpotSeamProjectionwelding
#LASERandElectronbeam
#Spotwelding
(also known as resistance spot welding) is a resistance welding process. This welding process is used primarily for welding two or more metal sheets together by applying pressure and heat from an electric current to the weld area.
#Resistanceseamwelding
is a variant of the basic resistance spot welding process. In spot welding a weld nugget is produced by passing an electric current through the sheet materials to be welded while they are held together under a mechanical force between shaped copper electrodes in a lap configuration. Fusion is produced where the sheet surfaces are in contact because this is the point of highest electrical resistance and hence the point where the temperature is highest.
In seam welding a series of overlapping nuggets is produced, usually by replacing the conventional spot welding electrodes by wheels that turn as the parts to be welded are fed between them. The process thus produces a continuous leaktight seam.
Resistance projection welding, or RPW, is a form of resistance welding where the electricity, force, and time are concentrated on raised segments (or projections) to join items together. It is also found in cross wire and bar welding, or in day to day products such as shopping carts.
Laser beam welding is a fusion welding process in which two metal pieces are joined together by the use of laser. The laser beam provides a concentrated heat source, focused to the cavity between the two metal pieces to be joined.
#LASER:
#Lightamplificationstimulatedemissionradiation
#Electronbeam
#EBW
welding is a
#fusionweldingprocess
whereby electrons are
#generatedbyanelectrongun
and
#acceleratedhighspeeds
using
#electricalfields.
This high speed stream of electrons is tightly focused using magnetic fields and applied to the materials to be joined. The beam of electrons creates kinetic heat as it impacts with the workpieces, causing them to melt and bond together.
15 сен 2024
