Laser cladding head with variable spot and method for manufacturing parts

Abstract

A step-variable spot cladding head and parts manufacturing method, the step-variable spot cladding head includes a powder nozzle, the cooling water sleeve is threadedly connected under the powder nozzle, a laser head bracket is installed above the powder nozzle, and multiple laser head brackets are installed on the laser head bracket. The large-spot laser output head and the small-spot laser output head, by turning on the laser output of the laser connected to the small-spot laser output head, output the small-spot laser beam, and form the high-precision small-spot contour cladding road and the fine structure of the part through Turn on the laser output of the laser connected to the large-spot laser output head, output the large-spot laser beam, and fill the cladding road with the large-spot in the larger part of the formed part. The parts manufactured by the invention can take into account the forming accuracy and efficiency at the same time, and the positioning accuracy is high. By controlling the start and stop of the laser output of the laser connected to the laser output head on the laser cladding head with variable spot, it is easy to realize automatic control.

Description

technical field [0001] The invention belongs to the field of advanced manufacturing technology, and in particular relates to a laser cladding head with variable facula and a part manufacturing method. Background technique [0002] Laser fusion deposition is a kind of personalized manufacturing technology. Its principle is to use high-energy laser beam as heat source to form a molten pool on the substrate, and send metal powder into the molten pool by inert gas. According to CAD data, point by point Lines are stacked face by face to form a solid part. It has broad application prospects in parts repair, coating, complex parts manufacturing and other fields. [0003] As an important part of laser cladding deposition equipment, the laser cladding head realizes the energy coupling of laser, powder and substrate. The advantages of the constant spot laser cladding head: the laser and the powder have precise convergence, and can form a dimensionally stable and precise cladding roa...

AI Technical Summary

Problems solved by technology

The parts formed by the laser cladding head with a constant small spot (such as d=0.5mm) have high structural precision, but the forming efficiency is low (40mm 3 / min), which increases the manufacturing cost of parts and limits its industrial application

The parts formed by the laser cladding head with a constant large spot (such as d=4mm) have high precision and high forming efficiency (>3000mm) 3 / min), but the accuracy is low, and there are obvious cladding layer steps at the boundary, which requires a large margin of machining before it can be used, and it is impossible to form fine and complex structural parts.

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