Heat distribution in spot welding, Mechanical Engineering

Assignment Help:

Heat distribution in spot welding

Besides the resistance at the interface, there are six other resistance through which the same welding current is passed. They are:

  1. Resistance of the upper electrode - R1
  2. Resistance of the upper electrode metal contact - R2
  3. Resistance of the top metal - R3
  4. Resistance of the bottom metal - R4
  5. Resistance of the metal - bottom electrode contact - R5
  6. Resistance of the bottom electrode -R6


Therefore, some amount of heat is generated in these regions also (equal to I2 x R x t).

The effective heat that is utilised is that due to the resistance at the metal - metal interface only, the others being losses.

Among the above six resistance, R2 and R5 are high compared to the other four. These two can be minimised by properly choosing the electrode pressure and cleaning the surface well.


Related Discussions:- Heat distribution in spot welding

Fermentation choices - fermenter, In considering a particular fermentation ...

In considering a particular fermentation there are a number of choices regarding process operation. Typical  initial considerations are listed below. Again, the choices made will d

Stress concentration factor, 1. Write a short note (not more than half A4 p...

1. Write a short note (not more than half A4 page) on your understanding on St. Venant's Principal for your engineering design analysis. 2.  Estimate the " Stress Concentration

Aerospace engineering, Have you ever been sit on a flight? Have you ever th...

Have you ever been sit on a flight? Have you ever think how those gigantic machines are developed ? Aerospace engineering is just the place where you require to be. Aerospace engin

Different laws of perfect gas, (a) What is an ideal gas ? How does it diffe...

(a) What is an ideal gas ? How does it differ from perfect gas ? Write the different laws of perfect gas. (b) The pressure in a car tyre was checked at 15 o C temp. and reading

Key words used in road under special conditions, Keywords used in appropria...

Keywords used in appropriate technology: Hill Roads : Roads in hilly and mountainous terrain. Landslides : The slippage of mass of hill face. Retaining Walls : Str

Module site installation preparation, Q. Module Site Installation Preparati...

Q. Module Site Installation Preparation? The following tasks shall be accomplished at the Facility site prior to setting the modules on the piles: After module support piles

Axis perpendicular to the vertical plane - tetrahedron, Axis perpendicular ...

Axis perpendicular to the vertical plane - tetrahedron: A tetrahedron of side 60 millimeter has its base parallel to the VP, along with an edge of the base inclined at 45 o t

Final year project, Project is about Heat exchanger kit named TE 93.....Pro...

Project is about Heat exchanger kit named TE 93.....Project guide has told us to do something with it..without modifying the project largely.....i came up with change of material o

Explain the welding process, All shell and head joints shall be double-weld...

All shell and head joints shall be double-welded butt joints with full penetration. In cases where double welding is impractical, the root pass shall be made by the GTAW process.

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