What is meant by metal frame welding?
Metal frame welding is one of the basic processes in the construction industry, which are used to create strong and stable connections between steel parts and metal frame implementation. This process, using heat and pressure, connects metal parts to each other and creates a strong and solid connection by welding.
Types of metal frame welding
Metal frame welding is done in different ways, each of which is suitable for specific conditions and uses. Some of the most important types of metal frame welding are: electric arc welding (SMAW): this method is one of the most common methods. It is welding in which an electrode is used to create an electric arc and melt metal. MIG (Metal Inert Gas) welding: In this method, a consumable welding wire and Shielding gas is used to create an electric arc and protect the molten pool and eventually welding TIG welding (Tungsten Inert Gas): In this method, a non-consumable tungsten electrode and argon shielding gas are used to create an electric arc.
Advantages of metal frame welding
Creating a strong and integrated connection: Welding creates a strong and integrated bond between metal parts, which increases the strength and resistance of the structure as a result.
High speed: Compared to other connection methods such as bolts and nuts, welding has a higher speed and as a result the construction time is reduced.
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Lower cost: In many cases, The cost of welding is lower compared to other joining methods.
Variety in application: Welding can be used to connect different types of metals in different conditions. It is a performance.
Important points in metal frame welding
Choosing the right welding method: Choosing the right welding method depends on the type of metal, thickness of parts, welding position and environmental conditions.
Proper preparation of the parts: Before welding, the surface of the parts should be cleaned and removed from any dirt, oil or rust.
Observe safety tips: The welder must wear safety equipment such as welding mask, Use gloves, work clothes and safety shoes and work in a well-ventilated environment. Welding quality control: After welding. , the welding quality should be checked using different methods such as non-destructive tests.
7 important principles in building frame welding
Principle 1: A good welded joint is able to efficiently transfer all applied loads through the joint.
If the joint is not strong enough, especially the beams of a structure Metal, its other aspects, will not really matter. The weld that connects different steel parts to each other must be of a size and material that has sufficient resistance depending on the intended application.
The second principle: A good welded connection has an obvious and direct load transfer path.
The stresses in the member must flow from one member to another through welding. A welded joint in building welding is suitable when this load transfer path is clear and direct. The third principle: a welded joint Well, it places the weld in the less stressed area.
As far as practical and possible, the position of the welds in metal building welding should be in the less stressed areas. By realizing this, welds will be less exposed to critical conditions. Also, since this work causes the size of the welds to be smaller, it is also worthy of attention from an economic point of view.
Principle four: A good weld should not cause stress concentration.
Some welds in the welding of metal frame buildings and the details of welded joints may cause stress concentration. For example, the presence of a steel back strap (if left in place) can cause stress concentration. A good welded joint should not be confined.
When a joint is welded, it is expected that the hot weld metal will expand and the hot base metal surrounding the weld will contract as it cools. During the cooling and contraction of the weld metal, the cooler (and unexpanded) area of the base metal resists the tensile stresses imposed by the weld metal.
Sixth principle : A good welded joint does not subject the weld to bending.
Certainly, making sheet beams using longitudinal welds and subjecting the beam to bending is possible. Acceptance. Principle 6 prohibits designers from applying loads that cause the weld to bend around its longitudinal axis.
Principle 7: A good welded joint It protects the edge and root of the weld. The edge and root of the weld in building welding can cause stress concentration and a proper weld joint protects these vulnerable areas.
Arin Sazeh is a producer of all kinds of round metal and arched stairs and also in the field of welding metal building frames and arched metal structures in Lavasan, Tehran, Pakdasht Campus, Shahriar, Parandak, Rabat Karim, Jajroud , Rodhen and Damavand are active.