What is welding and its types PPT?
Arc Welding: “Arc welding is a fusion welding process in which the heat required to fuse the metal is obtain from the electric arc between the base metal and an electrode. Types: 1. Metal Arc Welding 2. Submerged Arc Welding 3. Tungsten Inert Gas Welding 4.
What is arc welding PPT?
ARC WELDING • An electric arc is generated between an electrode and the parent metal • The electrode carries the electric current to form the arc, produces a gas to control the atmosphere and provides filler metal for the weld bead • Electric current may be AC or DC.
What is welding and its types?
There are four main types of welding. MIG – Gas Metal Arc Welding (GMAW), TIG – Gas Tungsten Arc Welding (GTAW), Stick – Shielded Metal Arc Welding (SMAW) and Flux-cored – Flux-cored Arc Welding (FCAW). We dive deeper into each type of welding here.
What are the 4 basic weld types?
The four main types of welding are: Gas Metal Arc Welding (GMAW/MIG), Gas Tungsten Arc Welding (GTAW/TIG), Shielded Metal Arc Welding (SMAW), and Flux Cored Arc Welding (FCAW).
What are the 5 types of weld?
There are five basic welding joint types commonly used in the industry, according to the AWS:
- Butt joint welding.
- Tee joint welding.
- Corner joint welding.
- Lap joint welding.
- Edge joint welding.
What is welding used for?
The basic purpose of welding is to join two elements together with a firm connection. Welders typically work with metal or thermoplastic and use durable filler material to bind them together. Welding is used to create many modern constructions in our world, such as skyscrapers, cars, ships and airplanes.
What is principle of arc welding?
Arc welding is welding using the heat of an arc as a heat source. In arc welding, positive voltage is applied to the electrode (welding rod/wire) and negative voltage is applied to the base material. This makes an arc occur from the base material to the electrode.
What is the welding process?
Welding is a fabrication process whereby two or more parts are fused together by means of heat, pressure or both forming a join as the parts cool. Welding is usually used on metals and thermoplastics but can also be used on wood. The completed welded joint may be referred to as a weldment.
What is the principle of welding?
Basic principles of welding. A weld can be defined as a coalescence of metals produced by heating to a suitable temperature with or without the application of pressure, and with or without the use of a filler material.
Which gas is used in welding?
Acetylene is the only fuel gas suitable for gas welding because of its favourable flame characteristics of both high temperature and high propagation rates. Other fuel gases, such as propane, propylene or natural gas, produce insufficient heat input for welding but are used for cutting, torch brazing and soldering.
What is a 6G welding test?
The 6G welding test, also known as the Arkansas bellhole test, is a means to identify the skills or lack of them in a welder. It’s stringent test, because the welder must use a variety of techniques, such as flat, vertical and horizontal welding to achieve a successful 6G weld.
What is a weld called?
Contact Us. Welding is a fabrication process whereby two or more parts are fused together by means of heat, pressure or both forming a join as the parts cool. Welding is usually used on metals and thermoplastics but can also be used on wood. The completed welded joint may be referred to as a weldment.
What are 2 types of welded joints?
What material is weld?
Weld metal is the metal in a welded joint which has been molten in the welding process and then solidified. It is usually a mixture of any filler metal and the parent metal, as well as any additions from the flux in the consumables, and will have an as-cast metallurgical structure.
What is electrode size?
Selection of Correct Size of Electrode
However commonly available electrode sizes are 2.0 mm, 2.5 mm, 3.2 mm, 4.0 mm and 5.0 mm. For special applications we have different size electrodes also. Some manufacturers use slightly different sizes like 3.15 mm for 3.2mm and 2.4 mm for 2.5 mm etc.
What is a welding process?
What are the 5 basic welding joints?
What are the properties of welding?
Welding parameters. Toughness.
Why oxygen is used in welding?
Pure oxygen, instead of air, is used to increase the flame temperature to allow localized melting of the workpiece material (e.g. steel) in a room environment.
What is the formula of welding gas?
∴ g-atoms of C in gas =3.3844=0.077 g-atoms of H in gas =0.690×218=0.077 ∴ Ratio of C and H atoms in gas is 1:1 Thus, empirical formula of welding gas is CH Empirical formula mass of welding gas =13 Molecular mass = (empirical formula mass)×n ∴ n=25.9813≃2 ∴ Molecular formula =2× empirical formula =2×(CH)=C2H2.
What is 2G 3G 4G welding?
For groove welding positions-
1G – (flat welding position) 2G – (horizontal welding position) 3G – (vertical welding position) 4G – (welding position overhead or overhead) 5G – (uphill/downhill vertical welding position)
What is a 5G weld?
5G Pipe Welding Position. 5G welding position is a situation where the pipe is in the horizontal or X-axis position, but the pipe is stationary or cannot be rotated. The welder performs the welding while moving it around the pipe. This situation is almost the same as the 1G situation; only the pipe cannot be rotated.
What tool is used for welding?
One of the most essential and basic welding tools are welding machines, which provide most of the power and equipment you need to weld. You will need different welding machines depending on what types of welding you plan to do: Flux-Cored and MIG welders. TIG Welders.
What is e7018 welding rod used for?
The 7018 arc welding rod is commonly used for general-purpose welding of carbon steel. It is a mild steel rod that is coated with a low-hydrogen, iron-based flux compound that vaporizes to shield the molten weld bead from contamination by air and moisture. This rod has a tensile strength of 70,000 lbs.
What are the types of electrodes?
There are mainly two types of electrodes, namely reactive and inert electrodes. A reactive electrode is an electrode which actively participates in the reaction. Some reactive electrodes include zinc, copper, lead, and silver. An inert electrode is a type of electrode which does not participate in a chemical reaction.