Seam welding-selection of parameters, Mechanical Engineering

Assignment Help:

Seam Welding-Selection of parameters

The selection of parameters for seam welding depends mainly on:

  • weld nugget size which is related to weld strength.
  • probability of porosity.
  • designed surface condition of the finished weld.

 

The selection is usually done by first assuming a welding speed and electrode force. Then, suitable current is arrived at by trial and error, till satisfactory weld is obtained. Guidelines for the selection can be obtained from the hand books. To achieve a leak tight seam, the overlap should be 15 % to 20 % of the nugget length, the penetration must be in the range of 30 % to 80 %. The effects of various parameters viz., current, electrode force, time and preweld cleaning are the same as in spot welding. The edges of the electrodes are trimmed after their usage for a particular period. This can be done in a lathe. In some welding machines, forming rollers are fitted for this purpose.


Related Discussions:- Seam welding-selection of parameters

Hot service insluation thicknesses, Q. Hot Service Insluation Thicknesses? ...

Q. Hot Service Insluation Thicknesses? Hot Service Insluation Thicknesses are specified based on the following design criteria: • Average Annual Climatic Conditions:

Calculate change of entropy of universe, Calculate change of entropy of uni...

Calculate change of entropy of universe: 5Kg of ice at 10 0 C is kept in atmosphere that is at 30 0 C. Calculate change of entropy of universe when it melts and comes i

Dynamics, a motorcycle is used to stunt show to go over a valley . if the i...

a motorcycle is used to stunt show to go over a valley . if the initial speed at A is u m/s, determine a. the minimum U so that the motorcycle reaches the bank at B. b. the veloc

Explain about unit pipe racks, Q. Explain about Unit pipe racks? Unit p...

Q. Explain about Unit pipe racks? Unit pipe racks are the main arteries carrying the pipes and cables into the units, and as such should be centrally located. They are usually

Find out the intensity of the external pressure, Find out the intensity of ...

Find out the intensity of the external pressure: A thick cylinder of 0.5 m external diameter & 0.4 m internal diameter is subjected simultaneously to internal & external press

Hydraulic ram, definition and picture of hyreaulic ram

definition and picture of hyreaulic ram

Determine the load on beam, Determine the load on beam: A rectangular ...

Determine the load on beam: A rectangular beam of width 200 mm and depth 300 mm is simply supported over a span of 5 m. determine the load that the beam may carry per metre le

Gear boxes , Gear Boxes : Motorcycle engines do not produce their full pow...

Gear Boxes : Motorcycle engines do not produce their full power at all RPM. There is very little power at idle and the power goes up as the engine RPM increases. At a certain RPM,

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd