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

Classification of system - thermodynamics, Classification of system - Therm...

Classification of system - Thermodynamics: (1) Kitchen refrigerator, (2) Ceiling fan (3) Thermometer in mouth (4) Air compressor (5) Pressure Cooker (6) Carburetor (7) R

Cam profile, sketch and discuss the uses and application of the following t...

sketch and discuss the uses and application of the following types of cam follower;knife edge,roller and flat ended.

IDE101, Polygon law of forces

Polygon law of forces

Pneumatic circuit design, 3. Design and draw a circuit using the cascade sy...

3. Design and draw a circuit using the cascade system to operate two cylinders (A and B) which, on the operation of a start valve, produces the sequence A – B + B – A+. The cylinde

Names of machine involed in making sewing machine table, please tell me nam...

please tell me names of machine involed in making sewing machine table with their work involved...

Natural frequency-degree of freedom-conservative system , Natural Frequency...

Natural Frequency: This is the frequency of vibration of a system that is undamped and without external excitation while it is disturbed. Forced Vibration: This is the vibra

Thermophyics, The steam that leaves the super-heater is expanded from 130ba...

The steam that leaves the super-heater is expanded from 130bar at 535°C to 25.2bar at 310°C in a high pressure turbine. The steam from the exit of the HP turbine is reheated to 535

Select a flat belt drive, It is essential to select a flat belt drive for a...

It is essential to select a flat belt drive for a compressor running at 720 r.p.m which is driven by a 25kW, 1440 r.p.m. motor. Space is available for a distance of 3m. The belt is

Find the value of force to move a system, Find the value of force to move a...

Find the value of force to move a system: Th e system of particles shown in the figure given below is initially at rest. Find the value of force F which should be applied so

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