What is Welding and types of welding processes?

Modern metal Fabrication process is not possible without the contribution of the Process named WELDING. So, We can say that welding plays very important role in today's industry.

Welding Process is not a newly found process of fabrication/joining, it is in existence since very long time. There is an evidence that Egyptian people knew how to weld two parts together. We have found some Gold boxes which have Lap weld joints. So, we can say welding is in existence from very long time ago. The only thing is that welding has improved from time to time till modern methods of welding.

Invention of Welding- We cannot appreciate or credit one person for the invention of Welding. 
In early 1800s, Sir Humphry Davy produced electric arc between two carbon electrodes through the use of a battery. 
In 1836, Edmund Davy of England discovered acetylene. Then Auguste De Meritens, while working in his laboratory in France, welded Lead Plates together with the heat of an arc for storage batteries. A Russian named Nikolai N. Benardos who was also working in French laboratory was granted a Patent for welding. 
In 1890, C.L. Coffin of Detroit was credited with first U.S. patent for an arc welding process using a metal electrode.

Welding- It is a material joining process in which two similar or dissimilar metals usually joined together by melting them at suitable high temperature and then allows them to cool to make a joint. Weld can be made with or without the application of Pressure and with or without the use of filler material.

Some of the metals or alloys are easier to weld than others. To compare this ease, term '' Weldability'' is used. Weldability is the property of material which means the ease with which the metals or alloys can be welded with. This property of material depends upon lots of factors i.e. Gas evolution, change in hardness, metallurgical changes during welding etc.
1.It is used to make Permanent joints, also affects the metallurgy of components.
2. It is used in the manufacture of automobile bodies, structural works, aircrafts, railway wagons, cylinders and also for the purpose of general repairing etc.

Types of Welding-
Broadly welding can be divided into given below groups-

Pressure Welding/Solid State Welding-

  1. Resistance Welding
  • Spot Welding
  • Projection Welding
  • Butt Welding
  • Flash Welding
  • Seam Welding
  2. Friction Welding
  3. Ultrasonic Welding
  4. Explosion Welding
  5. Induction Welding
  6. Cold Pressure Welding
  7. Diffusion Welding
  8. Magnetic Pulse Welding

Fusion Welding/Liquid State Welding-

  1. Gas Welding

  • Pressure Gas Welding 
  • Air-acetylene Welding
  • Oxy-hydrogen Welding
  • Oxy-acetylene Welding

  2. Arc Welding

  • Submerged Arc Welding
  • Gas Metal Arc Welding (MIG) 
  • Gas Tungsten Arc Welding (TIG) 
  • Carbon Arc Welding
  • Plasma Arc Welding
  • Shielded Metal Arc Welding
  • Stud Arc Welding

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What is Turbocharger & Supercharger?

You are here on this blog post because you are willing to know about the Turbocharger and Supercharger. We all know that both of them increases the power of vehicle output. But to know the difference between Turbocharger and Supercharger and to know how do they work. Lets dive into the post!

Turbocharger vs Supercharger

Before defining both, It must be clear to you that Turbocharger and Supercharger are known as Forced Induction System where air is compressed forcefully and then supplied to the engine's cylinder to increase the efficiency.

What is Turbocharger? 

Turbocharger does the same work/function as a Supercharger do. But his method of getting power to do operation is different.

Turbocharger gets connected on the exhaust side of the engine and get power from the exhaust gases. Exhaust gases contains enormous heat energy and this heat energy drives the turbine and then turbine drives the compressor. In this way atmospheric air get compressed and supplied to the engine's cylinder. This is effective at high altitudes/heights where all other normal engines doesn't perform sufficient operation and experience more difficulty. These also have smog altering devices which reduces the carbon emission to atmospheres.

A typical S.I. engine may harness up to 30% of energy from the fuel to do the primary work of vehicle moving and the rest energy i.e. 70% get lost to the environment in the following defined ways-
- 7% energy to friction
- 9% to the air
- 16% to cooling system
- 38% to exhaust gases

It works more efficiently on high speed and can spins up to 150K i.e.1,50,000 RPM.

Methods of Turbocharging-

  1. Miller Turbocharging
  2. Constant Pressure Turbocharging
  3. 2-Stage Turbocharging
  4. Pulse Turbocharging
  5. Pulse Convertor
  6. Hyperbar Turbocharging

Types of Turbocharger-

  1. Single Turbo
  2. Twin Turbo
  3. Twin Scroll Turbo
  4. Variable Geometry Turbo
  5. Variable Twin Scroll Turbo
  6. Electric Turbo

What is Supercharger?

Supercharger function is same as the Turbocharger, but the source of power to perform the operation is different. Supercharger is directly connected to the engine with the help of belt.

This gets installed on the top of the engine and get power from the engine's crankshaft to perform the operation. These are also effective at high altitudes/heights. These can work on low RPM and its spin speed is 50K i.e. 50,000 RPM.
Supercharger is the best way to increase your vehicle hp i.e. Horsepower and their performance. These can add on up to 46% of more horsepower to the vehicle.

Types of Supercharger-

Below mentioned Superchargers are used for supercharging the engines-

  1. Centrifugal Compressor
  2. Vane Blower
  3. Roots Blower
  4. Lysholm Compressor
  5. Reciprocating Compressor

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