Laser multi-beam cladding device

Abstract

The invention relates to a laser multi-beam cladding device, which includes a beam splitter and a reflective focusing assembly, the beam splitter includes at least two first mirror parts and at least two second mirror parts, and the first mirror parts and the second mirror parts split light along the The mirrors are arranged at intervals in the circumferential direction of the central axis, the first mirror part receives part of the incident beam and reflects the part of the incident beam to form the first reflected beam, and the second mirror part receives part of the incident beam and reflects the part of the incident beam to form Form the second reflected light beam, the first reflected light beam and the second reflected light beam are reflected along the circumference of the central axis of the beam splitter, the reflection angle of the first reflected light beam is different from the reflection angle of the second reflected light beam, and the reflective focusing assembly includes a reflective focusing mirror and a reflector, the reflective focusing mirror reflects and focuses the first reflected beam to form a cladding beam; the reflector reflects the second reflected beam to form a preheating beam.

Description

technical field [0001] The invention relates to a laser multi-beam cladding device, which belongs to the field of laser additive manufacturing. Background technique [0002] In the advanced laser processing and forming manufacturing technology, there is a key technology, that is, the laser and the molten material are transmitted to the processing and forming position synchronously, and the metal material is continuously, accurately and uniformly put into the processing surface to focus on the scanning movement according to the predetermined trajectory. In the light spot, the precise coupling of optical materials is realized. The material converts light energy and heat energy in the beam, melts instantly and forms a molten pool, and completes the metallurgical process of rapid melting and solidification of the material. [0003] In the prior art, due to the sudden cooling and heating effect of laser cladding, the processing material will have a large degree of overheating an...

AI Technical Summary

Problems solved by technology

However, in the prior art, the following problems exist in the relevant patents that combine cladding and preheating technology: US Patent Application No. US2009 / 0283501A1 discloses that using an independent laser to preheat the workpiece will have the following problems: 1. The structure of the nozzle is very complicated and the cost is high; 2. The nozzle will be very large and cannot enter the narrow space to carry out some cladding work

[0005] The content disclosed in Chinese patent application No. CN201380036006.8 uses an inductance device to preheat the material to be clad, which is completely independent from the cladding work, and there will be the following problems: 1. The structure of the nozzle is very complicated and the cost is high; 2. The volume of the nozzle It will be very large, and it is impossible to enter a small space to carry out some cladding work; 3. The wire is heated inductively in the channel. During the process of leaving the channel and entering the molten pool, the wire loses the heating source, and the temperature on the wire It will change, which will easily lead to changes in the position accuracy of the wire, which will easily affect the surface quality and accuracy of the cladding layer, and even lead to the inability to carry out the cladding work; 4. Inductive heating only heats the wire and does not heat the substrate. Heating only improves the cladding efficiency, but does not really play a role in reducing the thermal stress of the molten layer and reducing defects such as thermal cracks

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