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

Centerless grinding machine, which type of guideways are used in centerless...

which type of guideways are used in centerless grinding machine? which are the errors find in different guideways?

Determine the topological information of b-rep, Topological information of ...

Topological information of b-rep It provide the relationships among vertices, edges and faces similar to that used in a wire-frame model. In addition to connectivity, topologi

Functional units and machine elements, Examine the CNC machines at Universi...

Examine the CNC machines at University of Greenwich. You are needed to present and discuss about the major functional units and vital machine elements of  the CNC milling at Univer

Motion of two bodies - rough surface and smooth pulley, Motion of two bodie...

Motion of two bodies - rough surface and smooth pulley: THE HORIZONTAL SURFACE IS ROUGH AND THE STRING IS PASSING OVER SMOOTH PULLEY. Figure shows two weights W 1 and W 2

Calculate the cycle and production rate , Calculate the Cycle and Productio...

Calculate the Cycle and Production Rate for Single-Machine Robotic Cell Determine the cycle and production rate for a single-machine robotic cell for an 8-hr shift if the syst

Design of screw feeder and screw conveyor, A new process plant for ore proc...

A new process plant for ore processing is currently being planned. The design is only in the first stage. However, three requirements have already been clearly stated: - The bins s

Source of materials, Q. Source of Materials? The user may restrict sour...

Q. Source of Materials? The user may restrict sources of fabrication materials. If there is a restriction, the prospective manufacturers must be informed at the time of biddin

Work, proof of work being a path function

proof of work being a path function

Factored axial load, You have been selected to assist the structural engine...

You have been selected to assist the structural engineer for a bridge replacement project.  Your task is to design the size of the footing for an interior bridge pier, based on the

Pin-jointed steel structure, Pin-jointed steel structure: Find out the...

Pin-jointed steel structure: Find out the forces in the members of the pin-jointed steel structure. Solution Joint D  Suppose f CD and f DE both as tensile forc

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