An adjustable anti-splash broadband laser cladding coaxial powder feeding nozzle and its manufacturing method

Abstract

The invention relates to an adjustable type anti-splashing wide-band laser cladding coaxial powder-feeding nozzle and a manufacturing method thereof. The adjustable type anti-splashing wide-band lasercladding coaxial powder-feeding nozzle comprises an upper body, an intermediate body, a lower body and a blowing mechanism. The upper body comprises a compression ring, a connecting hoop and an adjusting nut, the intermediate body comprises a positioning pin, a lifting flange, a gas insulation sleeve and a connecting disc, the lower body comprises a blocking piece, a gland, a cooling water hood,an outer layer gas hood, a powder-feeding hood, an inner layer gas hood and an end seal hood, and the blowing mechanism comprises a blowing groove block connected with an anti-splashing air hole of the lifting flange and a blowing pipe with the working range covering a rectangular hole in the gland. According to the adjustable type anti-splashing wide-band laser cladding coaxial powder-feeding nozzle, it is ensured that a laser protective eyewear is not polluted, powder feeding is stable and even, the powder utilization rate of laser cladding is high, the cooling effect is good, disassembly and assembly are easy, the powder-feeding width and the angle are adjustable, the defocusing amount is adjusted steplessly, and the adjustable type anti-splashing wide-band laser cladding coaxial powder-feeding nozzle is suitable for wide-band type laser cladding powder feeding of various different focal lengths and light spot sizes.

Description

technical field [0001] The invention belongs to the technical field of laser material processing, and in particular relates to an adjustable anti-splash broadband laser cladding coaxial powder feeding nozzle and a manufacturing method thereof. Background technique [0002] Laser cladding is an advanced manufacturing technology that combines rapid prototyping technology and laser cladding surface strengthening technology. It uses high-energy laser beams to form a molten pool on the metal substrate, which will be delivered to the metal substrate through the powder feeding device and powder nozzle. The metal powder in the molten pool or the coating pre-prepared on the substrate is melted, and after rapid solidification, it forms a metallurgically bonded surface coating with the substrate, thereby significantly improving the wear resistance, corrosion resistance and oxidation resistance of the surface of the body material. Compared with surface engineering technologies such as a...

AI Technical Summary

Problems solved by technology

At present, the powder feeding nozzles for broadband laser cladding have the following deficiencies: 1) The common characteristics of the existing coaxial powder feeding nozzle devices for broadband laser cladding are poor powder convergence, low powder utilization, and difficulty in forming powder at the focal point. Powder concentration distribution that matches the laser beam; 2) The existing wide-band lateral powder feeding nozzles have inconsistent cladding performance in the front and rear directions of laser cladding; 3) Existing powder feeding nozzles for laser cladding lack processing molten pool melting The anti-splash function of slag can easily cause damage to the protective mirror lens of the laser processing head; 4) Due to the limitation of the rectangular shape of the powder feeding beam, the existing broadband laser cladding coaxial or lateral powder feeding nozzles are not manufactured. Difficult processing, some designs cannot even be processed and assembled, such as the invention patent "Adjustable Broadband Bidirectional Symmetrical Powder Feeding Laser Cladding Nozzle" with the authorized announcement number CN 1139455C. The cooling water channels of the

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