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Welding knowledge

How to select welding equipment and welding filler metal

Welding is a delicate work, from the use of appropriate welding technology to the selection of appropriate welding equipment, welding materials and filler metal, many factors contribute to the realization of high quality welding.

[filler metal]

Fill metal types and sizes should match the function and application requirements of the welding equipment to avoid poor wire feeding, welding defects or expensive rework.

[welding equipment]

Poor welding quality problems may occur if welding equipment is unable to operate at a given wire size, or porosity or other weld inconsistencies may occur if the filler metal does not fit the base material.

1. Welding material -- how to choose filling metal

Before deciding which filler metal to fill, first determine the task to be completed, base type, welding position and joint configuration will affect the selection.Some welding equipment and process can be used for some materials, such as tungsten argon arc welding of aluminum need to have the ability of an alternating current power supply, may also affect the filler metal base material, based on the materials mechanical and chemical properties of the degree of match choose products, welding position also plays an important role in success, provide higher deposition rate of large diameter wire can be used to weld or horizontal welding, vertical, or at the top of the welding need to have a lower deposition rate of smaller diameter of wire.Next, it is necessary to understand the type of joint to be welded, for example, the joint needs different procedures and equipment, which is more suitable for configuration according to the required power.

2. How to select welding equipment

After determining the filling metal and equipment requirements according to the application, it is necessary to consider whether the functions of the welding equipment can meet the work requirements.

First, evaluate the duty ratio and maximum output of the welding power supply, both of which help determine the applications that the machine can handle. The thicker the material, the greater the output produced by the power supply.Machines with small output may not have power output on thicker materials. To facilitate selection, welding equipment manufacturers will provide a budget for material thickness. Some newer power models can provide preset welding parameters according to material thickness range.

Also consider other factors in the welding system and components, including protective gas, gas metal arc welding and consumables, and driven roller and guide rail, grounding cables and input power are available, and these should conform to the application requirements of filler metal type and size of demand, such as to ensure the driving roller and the diameter of the guide rail, apply to the type of filler metal, choosing a filler metal, manufacturing parameters of chamber of commerce recommended products, assess the degree of match these parameters and power function.

For different welding materials, solid, flux-cored and metal-cored wires can be used. The use of filler metals affects the characteristics of the finished weld, including strength and appearance.To produce high quality welds, these resources can provide a recommended range of filler metal types or sizes selected for welding equipment.


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