Different welding machine
Laser welding principle-laser is the acronym of radiative stimulated emission amplification. Because of its unique high brightness, high directivity, high monochromism and high coherence, it has been widely used in industrial processing since its birth, and it has been widely used in industrial processing since its birth, because of its unique high brightness, high directivity, high monochromaticity and high coherence. Become the future manufacturing system common processing means. Laser welding is a laser beam with high radiation intensity. After the laser beam is focused by an optical system, the power density of the laser focus is 104? 107W / cm ~ 2, and the workpiece is heated and melted near the laser focus. Whether the melting phenomenon can occur or not depends mainly on the time and power density of the laser acting on the surface of the material. And peak power. By controlling the parameters mentioned above, various welding methods for sensor seal welding can be processed by laser, such as resistance welding, argon arc welding, electric beam welding, plasma welding, etc
At present, the welding methods of sensor seal welding are: resistance welding, argon arc welding, electric beam welding, plasma welding etc.
1, resistance welding: it is used to weld thin metal parts, between the two electrodes to clamp the welded workpiece through a large current melting electrode contact surface, that is, through the workpiece resistance heating to carry out welding. The workpiece is prone to deformation, the resistance welding is carried out through the two sides of the joint, while the laser welding is carried out only from one side, the electrode for resistance welding needs to be maintained regularly to remove the oxide and the metal adhesion from the workpiece, and the laser welding of the thin metal lap joint is not in contact with the worker Moreover, the beam can enter the hard-to-reach area of conventional welding, and the welding speed is fast.
2.argon arc welding: non-consumable electrode and shielded gas are often used to weld thin workpieces, but the welding speed is slower, and the heat input is much larger than laser welding, so it is easy to produce deformation.
3, plasma arc welding: similar to argon arc, but its torch will produce compressed arc to increase arc temperature and energy density, it is faster than argon arc welding, greater penetration, but less than laser welding.
4. electron beam welding: it impinges on the workpiece by accelerating the high energy density electron current, produces huge heat in the small dense product on the surface of the workpiece, forms the "small hole" effect, thus implements the deep fusion welding Take it. The main disadvantage of electron beam welding is that high vacuum environment is needed to prevent electron scattering, the equipment is complex, the size and shape of welding piece is limited by vacuum chamber, the assembly quality of Korean parts is strictly required, and the non-vacuum electron beam welding can also be carried out. However, the effect of focusing due to electron scattering is not good. Electron beam welding also has magnetic offset and X-ray problems. Due to electron charge, it will be affected by magnetic field deflection, so it is required that the electron beam welding workpiece be demagnetized before welding. X-ray is very strong under high pressure, so it is necessary to protect the operator. Laser welding does not require a vacuum chamber and demagnetization of the workpiece before welding. It can be carried out in the atmosphere and does not prevent X-ray problems. So in the production line can be online operation, but also welding magnetic materials.
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