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

SFD AND BMD, what is SFD and BMD? EXPLAIN

what is SFD and BMD? EXPLAIN

Find velocity of the vehicle, Find velocity of the vehicle: A car hav...

Find velocity of the vehicle: A car having mass 400kg is moving with velocity of 20m/sec. A force of 200N that acts on it for 2 mins. Find velocity of the vehicle: (1) W

What is drilling, What is Drilling It is an operation by which holes ar...

What is Drilling It is an operation by which holes are produced in solid metal by means of revolving tool known as „Drill?. The various operations on drilling machine.

Determine the half-space method, Half-space Method Solid representation...

Half-space Method Solid representation is based fundamentally on the notion that a physical object divides an n-dimensional space E n into two regions: interior and exterior,

Beam reactions, i would like to know how much it would cost to for my assig...

i would like to know how much it would cost to for my assignment without the actual graphs but the dimentions and without the assignment being converted into a word document as lon

Sign convention - solving problems of beam, Sign convention which is used f...

Sign convention which is used for solving problems of beam: Although different sign conventions can be used, most of the engineers use following sign conventions for shear for

Kinematics, derive an expression for range along iclined palne

derive an expression for range along iclined palne

Evaluate the heat input per day, The input-output curve of a 60 MW power st...

The input-output curve of a 60 MW power station is provided by : I = 10 6 [8 + 8L + 0.4L 2 ] Kcl/hour where I is the input in the Kcal/hour and L is the load in MW. (a) Ev

Illustrates about the need for reinforcement, Illustrates about the need fo...

Illustrates about the need for reinforcement? NEED FOR REINFORCEMENT Concrete is economical and durable and is currently universally utilized for footings. Plain concrete is

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