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What are the technical characteristics of sheet metal welding process?

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What are the technical characteristics of sheet metal welding process?

Release date:2017-09-01 Author:Source Network Click:

Welding process is by heating, pressurizing, or a combination of both, with or without welding consumables, so that the two work pieces produce atomic diffusion between atoms to form a metallurgical combination of processing technology and connection. Dalian sheet metal welding a wide range of applications, both for metal, can also be used for non-metallic. What are the technical characteristics of the welding process?



1. Laser welding: Laser radiation heats the surface to be machined. The surface heat diffuses to the interior through heat conduction. The laser melts the workpiece to form a specific weld pool by controlling the laser pulse width, energy, peak power and repetition frequency.

    Laser welding technology is widely used in the field of high precision manufacturing such as automobiles, ships, airplanes and high-speed railways. It has brought great improvement to people's life quality and led the home appliance industry into the Seiko era.

    2. Laser compound welding: Laser beam welding combined with MIG welding technology, to obtain the best welding results, fast and weld bridging ability, is the most advanced welding methods. The advantages are: fast speed, small thermal deformation, small heat-affected zone, and guaranteed weld metal structure and mechanical properties.

    In addition to laser welding composite sheet metal welding structure, but also for many other applications. For example, the application of this technology to the production of concrete pumps and mobile crane jibs requires the processing of high strength steels, which often result in increased costs due to the need for other ancillary processes such as preheating. In addition, the technology can also be applied to the manufacture of rail vehicles and conventional steel structures (such as bridges, fuel tanks, etc.).

    3 friction stir welding: the use of friction heat and plastic deformation heat as a welding heat source. Friction stir welding process is a cylinder or other shape (such as with a threaded cylinder) into the workpiece at the seam, the high speed rotation of the welding head, making it friction with the welding workpiece material, so that the connection site The temperature of the material softens.

    Friction stir welding can be achieved between dissimilar materials welding, such as metal, ceramics, plastics and so on. Friction stir welding high quality, easy to produce defects, easy mechanization, automation, stable quality, low cost and high efficiency.

    4. Electron Beam Welding: Electron beam welding is the use of accelerated and focused electron beam bombardment placed in a vacuum or non-vacuum welding of the heat generated by the welding method.

    Electron beam welding is widely used in many industries such as aerospace, atomic energy, national defense and military, automotive and electrical instrumentation for its advantages of no welding rod, easy oxidation, good process repeatability and small thermal deformation.

    5 flash butt welding: the use of welding machine so that both ends of the metal contact, through the low-voltage high current until the metal is heated to a certain temperature becomes soft, the axial pressure forging to form a butt welded joint.

    6. Ultrasonic metal welding: a special method of using the mechanical vibration energy of ultrasonic frequency to connect the same metal or dissimilar metal. Metal ultrasonic welding, neither the current delivery to the workpiece, the workpiece is not subjected to high temperature heat source, but under static pressure, the frame vibration energy into work room friction work, deformation and limited temperature rise. The metallurgical bond between the joints is a solid state weld achieved without the base metal melting.

    The advantages of ultrasonic welding metal is fast, energy saving, high fusing strength, good electrical conductivity, non-sparking, close to cold processing; the disadvantage is the welding of metal parts can not be too thick (generally less than or equal to 5mm), solder joints can not be too large, Pressurized.

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Related tags:大连钣金件

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