Views: 8 Author: Site Editor Publish Time: 2021-02-09 Origin: Site
Welding refers to the joining or fusing of parts by heating and/or compression to form a continuum of parts. The heat source in welding is usually an arc flame produced by the welding power source. Arc - based welding is also called arc welding.
We will guide you to know the welding as follow:
Introduction for welding process
Before starting the welding, shape the edges of the weldment into a suitable weld groove, such as a V-groove.As the welding proceeds, the arc fuses the edges of the groove and the filler together to form a molten pool.
In order to make the weld strong and durable, the molten weld must be protected from oxidation and surrounding air, for example by the use of protective gas or slag. The shielding gas is fed into the molten welding pool together with the torch. A material that produces a protective gas and slag above the molten welding pool is also coated on said welding electrode.
The most commonly used welding materials are metals, which include aluminum, mild steel, and stainless steel. In addition, plastic can be welded. In plastic welding, the heat source is hot air or a resistor.
There are a variety of different processes, with their own technical and industry applications, including:
This category includes some common manual, semi-automatic, and automatic processes. Including MIG, TIG, GTAW, FCAW, GMAW, SAW, SMAW, and gas-shielded arc welding.
These techniques typically use filler materials that are primarily used to join metals, including stainless steel, aluminum, nickel and copper alloys, cobalt, and titanium. The arc welding process has been widely used in petroleum, natural gas, electric power, aerospace, automotive, and other industries.
Friction welding uses mechanical friction to join materials together. This can be done in a variety of ways with different welding materials including steel, aluminum, and even wood.
Mechanical friction generates heat that softens the mixture, forming a bond as it cools. Friction welding does not require the use of filler metals, flux or shielding gases.
Friction is commonly used in aerospace applications because it is ideal for joining "non-welded" lightweight aluminum alloys.
The friction process has been used throughout the industry, and methods of bonding wood without the use of adhesives or nails are being explored.
The fusion bonding process uses high-speed electron beams to bond materials together. The kinetic energy of the electrons is converted to heat when they collide with the workpiece, causing the material to melt together.
Electron beam welding (EBW) is performed in a vacuum (using a vacuum chamber) to prevent the electron beam from dissipating.
EBW has many common applications that can be used to connect thick-walled segments. That means it can be used in industries ranging from aerospace to nuclear power and from cars to railways.
For bonding thermoplastic or metal parts, this process uses a laser to provide concentrated heat, ideal for trolleys, deep welds, and high bonding rates. Because it is easy to automate, this process can be performed at high welding speeds, making it ideal for high-volume applications, such as the automotive industry.
Laser beam welding can be done in the air rather than in a vacuum, for example by electron beam connection.
This is a fast process used in the automotive industry. The process can be divided into two types, resistance spot welding, and resistance seam welding.
Spot welding uses heat transferred between two electrodes, which is applied to a smaller area as the workpiece is clamped together.
Stitch welding is similar to spot welding, except that it uses rotating wheels instead of electrodes to achieve continuous, leak-free welding.