Coaxial protective gas nozzle for laser welding and laser welding equipment
A protective gas and laser welding technology, which is applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve problems such as overheating damage, and achieve the effect of prolonging service life and reducing damage
Pending Publication Date: 2021-10-22
TRUMPF CHINA CO LTD
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Problems solved by technology
[0005] However, during the use of the existing coaxial shielding gas nozzles, the gas in the coaxial shielding gas nozzles is very easy to escape in the reverse direction. In addition, the coaxial shielding gas nozzles are easily damaged by overheating due to the absorption of reflected light near the welding part
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[0028] In order to make the technical problems, technical solutions and beneficial technical effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and multiple exemplary embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, rather than to limit the protection scope of the present invention.
[0029] figure 1 An exploded perspective view of a coaxial shielding gas nozzle for laser welding according to an exemplary embodiment of the present invention is shown.
[0030] Such as figure 1 As shown, the coaxial shielding gas nozzle 1 includes a nozzle body 11 and an at least partially light-transmitting shielding gas backflow barrier 12 adapted to be arranged on the nozzle body 11, wherein, in the working state, the laser head (not shown) emits The laser beam passes through the shielding gas backf...
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The invention discloses a coaxial protective gas nozzle (1) for laser welding. The nozzle at least comprises: a nozzle body (11) having a spraying opening (111), a protective gas backflow blocking piece (12) suitable for preventing protective gas, which is sprayed out through the spraying opening (111) and returns from a workpiece to be welded, from reversely flowing back in the nozzle body (11), wherein the protective gas backflow blocking piece (12) is arranged on the nozzle body (11), and at least a partial region of the blocking piece is transparent and allows a laser beam to pass therethrough. The invention further discloses corresponding laser welding equipment. Particularly, a laser channel of a gland, the protective gas backflow blocking piece, a gas inlet cavity and a protective gas cavity are overlapped to form a laser beam channel. The protective gas backflow blocking piece is positioned above a gas inlet, and is used for preventing the protective gas from reversely overflowing and protecting the protective gas by gas which is transversely blown out. A gas diffusion structure can enable the gas to be evenly and stably input and improve the overall structural strength of the nozzle. The cooling fluid channel is used for cooling fluid circulation.
Description
technical field [0001] The invention relates to a coaxial protective gas nozzle for laser welding and a laser welding device. Background technique [0002] Laser welding is a method of welding the weldment by irradiating the weldment with a focused laser beam to generate heat. Due to the optical properties of laser such as refraction and focusing, laser welding is very suitable for welding of micro parts and parts with poor accessibility. Laser welding also has the characteristics of low heat input, small welding deformation, and is not affected by electromagnetic fields. [0003] When using laser welding, in order to prevent oxidation and reduce porosity, local jet protection must be carried out during the welding process. For this purpose, nozzles are usually used to spray shielding gas towards the area of the workpiece to be welded. [0004] One type of nozzle is the coaxial shielding gas nozzle, which is usually mounted on the laser head to generate shielding gas ar...
Claims
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IPC IPC(8): B23K26/14B23K26/70B23K26/21
CPCB23K26/1462B23K26/703B23K26/21
Inventor 刘源侯泽恺F·莱勒于特尔李文杰冯峰卓鹏陆剑锋
Owner TRUMPF CHINA CO LTD