A laser coaxial fuse device and a method for generating a rotating ring beam

Abstract

A laser coaxial fuse device and a method for generating a rotating ring beam, including a support frame, the top of the support frame is provided with an incident hole, the bottom is provided with a support part corresponding to the position of the incident hole, and the surrounding array of the support part is provided with a plurality of fan-shaped There is a connecting baffle between adjacent fan-shaped openings; a focusing lens is installed at the entrance hole, and a collimating lens connected to the laser fiber interface is provided on the top of the focusing lens; a ring-shaped lens is provided on the inner wall of the supporting frame For the reflecting mirror, a driving motor is arranged on the supporting part, and the output shaft of the driving motor is connected to a plane reflecting mirror arranged obliquely. In the present invention, the incident laser light does not need to be transformed, and the rotating ring beam that intersects at the preset converging point is generated through the fast-rotating plane reflector and the ring reflector, and the preset converging point is adjusted through the focusing mirror The diameter of the light spot at the point has the advantages of simple overall structure, low manufacturing cost, small energy loss and high maximum available laser power.

Description

technical field [0001] The invention relates to the technical field of laser fuse additive processing, in particular to a laser coaxial fuse device and a method for generating a rotating annular beam. Background technique [0002] Laser coaxial fuse forming technology is a laser additive manufacturing technology that uses laser as heat source, synchronously fed wire as raw material, and keeps the wire and laser beam coaxial. Among them, a mainstream solution is the ring beam laser coaxial fuse solution, that is, a laser beam is transformed into a ring beam by a special method, the ring beam is reflected and focused at the convergence point, and the wire is fed from the inside of the ring beam and combined with the ring beam. The beams maintain a coaxial relationship, and the fed wire is irradiated by the laser beam at the convergence point and melted to form a molten pool. [0003] CN201010017158.1 invention patent and CN201410373071.6 invention patent disclose content, bot...

AI Technical Summary

Problems solved by technology

Its disadvantages include four aspects: First, the structure of the conical mirror and the annular concave mirror is relatively complicated, its processing and coating are difficult, and the manufacturing cost is high; second, compared with the conventional optical flat mirror and lens, the conical mirror and the annular concave mirror The energy loss of the laser beam is relatively large; three, the laser power is too large, it is easy to cause the damage of the conical mirror (the melting of the cone top, the coating peeling off or the cracking of the conical mirror), so the maximum available laser power is limited; four, when the laser coaxial wire feeding (Powder) After the structure of the device is fixed, the spot diameter at the converging point is usually constant and difficult to adjust

The above four aspects seriously restrict the application of ring beam laser coaxial fuse device

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