Working Principle of Resistance Projection Welding (RPW)
In resistance projection welding (RPW), small-scale projections are formed on 1 or both pieces of the base of operations metallic to obtain contact at a betoken which localize the electrical flow menses in addition to concentrate the heat. Under pressure, the heated in addition to softened projections collapse in addition to a weld is formed. Projection on the upper element is pressed against the lower element past times electrode force. The projection collapses in addition to a fused weld nugget are formed amongst the application of current. This technique is of particular value inwards mounting attachments to surfaces of which the dorsum side is inaccessible to a welding operator.
Advantages of resistance projection welding
- Simultaneous functioning tin flaming hold out done i.e. to a greater extent than than 1 welds tin flaming hold out made.
- Projection welding has this wages that it tin flaming weld metals of thickness which is non suitable for spot welding.
- Projection welding electrodes accept a longer life when compared to location welding electrodes. Its because projection welding electrodes accept to withstand less vesture in addition to less heating.
- Resistance projection welding is non express to canvas to canvas joints.
- Projection welding tin flaming hold out done inwards specific points which are desired to hold out welded.
- In hard welding run projection welding gives a ameliorate oestrus balance.
- Projection welding saves electricity because it needs less electrical flow to create heat. So it reduces the shrinkage in addition to distortion defects.
Disadvantages of RPW
- All types of metals cannot hold out welded using projection method. Metal thickness in addition to composition is a big question.
- All the metals are non rigid plenty to back upward the projections. Some brasses in addition to coppers cannot hold out welded satisfactorily using projection welding.
- There is an extra functioning which is called forming of projection.
- Projections take away to accept same heights for a appropriate welding.
Applications
- Resistance Projection welding is used inwards Automobile sector.
- Projection welding is used inwards refrigeration industrial plant ( volume production of condensers, gratings, racks etc.)
Please Read to a greater extent than most welding:
- Gas Metal Arc Welding (GMAW) or MIG Welding
- Flux shielded metallic arc welding procedure principle
- Tungsten Inert Gas welding or TIG welding
- Advantages in addition to Disadvantages of Submerged arc welding
- Submerged Arc Welding Working Principles in addition to Uses
- Resistance Seam Welding (RSEW)
- Resistance Spot Welding