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

Context level data flow diagram, Context Level Data Flow Diagram In thi...

Context Level Data Flow Diagram In this section, the cell control model conversation in the former section is demonstrated by the data flow diagram as in following figure of co

State - thermodynamics, STATE - Thermodynamics: The State of system is...

STATE - Thermodynamics: The State of system is its condition or configuration described in detail. State is the condition of the system which is identified by thermodynamic

Maximum shear stress, An aircraft flap actuator housing made of cast magnes...

An aircraft flap actuator housing made of cast magnesium alloy ZAG3A-T4 with uniaxial yield strength σ Y = 14,000 psi.  At the suspected critical point the calculated state of str

Service and maintenance procedures, Service and Maintenance Procedures, you...

Service and Maintenance Procedures, you have studied detailed procedure of motorcycle service and maintenance and points to be remembered while servicing. In the next course, you s

Calculate stress in the bolts, A new high temperature alloy has been dev...

A new high temperature alloy has been developed with creep properties as follows: stress exponent, m = 4.5, activation energy, Q = 110,000 J/mol and pre-exponential constant,

Determine the fatigue strength of medium carbon steel, Determine the fatigu...

Determine the fatigue strength of medium carbon steel: For determining the fatigue strength of medium carbon steel 15 specimens, identical in all respect were tested in cantil

Electrodes- storage and handling of electrodes, STORAGE AND HANDLING OF ELE...

STORAGE AND HANDLING OF ELECTRODES It is recommended that the electrodes should be stored in a warm and dry place. Generally, conditions of storage in the shop are not very condu

Fluid mechanics, a petrol tanker uses gravity to empty its 35kl tank in to ...

a petrol tanker uses gravity to empty its 35kl tank in to an underground storage tabk. the hose that is used has a roughness equivalent to galvanised iron, has an internal diameter

Calculate the machine power factor, A 3-phase, 15-kV, 4-pole, cylindrical r...

A 3-phase, 15-kV, 4-pole, cylindrical rotor synchronous generator is connected to a 50-Hz infinite bus. The synchronous reactance of the machine is X s = 0.6 ohms per phase and th

Heavy load supports, A number of heavy items are to be off-loaded from a He...

A number of heavy items are to be off-loaded from a Heavy-Lift Ship and placed on a series of "support assemblies" on the quayside to await transportation by road to their destinat

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