Laser welding head with coaxial light path

Abstract

The invention discloses a laser welding head with a coaxial light path. The laser welding head comprises a light path cavity, a laser emitting head, a laser optical fiber used for providing laser beams, an infrared temperature measuring optical fiber used for collecting infrared temperature measuring light beams and a camera used for providing visual positioning and monitoring light beams, whereinthe laser optical fiber, the infrared temperature measuring optical fiber and the camera are correspondingly connected to the light path cavity; the light path cavity combines the laser beams, the infrared temperature measuring light beams and the visual positioning and monitoring light beams into a three-in-one coaxial light beam, and the coaxial light beam passes through the laser emitting headso as to perform laser welding, temperature measuring and visual positioning on the position of a welding spot located at the laser emitting head; and the laser emitting head is internally provided with a laser focusing lens used for transmitting the three-in-one coaxial light beam and focusing the laser beams. According to the laser welding head, the coaxial light beam makes temperature controland vision positioning play effective roles at the special welding spot position, the control is accurate, the reliability is higher, therefore, the problem that the temperature control detection canbe easily interfered is solved; and moreover, the size of the light spot at the focal point of the laser can be adjusted so as to be suitable for bonding pads with different sizes.

Description

technical field [0001] The invention relates to the field of laser welding equipment, in particular to a laser welding head with a coaxial optical path. Background technique [0002] Laser soldering uses high-energy laser pulses to locally heat the material in a small area. The energy of the laser radiation is absorbed by the material and then heated up to form a specific molten pool after melting the material. There are roughly two structures of solder that are widely used at present: one is the traditional electric soldering iron automatic welding; the other is the laser welding structure. [0003] The traditional electric soldering iron welding is a contact welding process that cannot meet the welding of tiny precision devices, and cannot meet the precise positioning. [0004] The existing laser welding can basically satisfy the welding of tiny precision devices, such as figure 1 As shown, it is a structural schematic diagram of the laser welding head of the existing la...

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Problems solved by technology

[0006] In order to solve the above-mentioned problems in the prior art, the present invention provides a laser welding head with a coaxial optical path to solve the problem that the temperature control process of the existing laser welding equipment is easily affected by the structure of the welding equipment and the structure of the welded product, and The problem that the spot size at the laser focus cannot be changed

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