Double-wire electric arc composite laser cladding method and device

Abstract

The invention provides a double-wire electric arc composite laser cladding method and device, and relates to the field of laser beam processing of high-end equipment manufacturing, and the method comprises the following steps: connecting conductive pieces to the positive and negative electrodes of a direct-current arc power supply through wires respectively; one of the two cladding wires conveyed by the wire feeding wheel set penetrates through and is in electric contact with the wire penetrating hole of the positive electrode conductive piece, the other one of the two cladding wires penetrates through and is in electric contact with the wire penetrating hole of the negative electrode conductive piece, and the cladding ends of the two cladding wires intersect; an air outlet of an airflow nozzle is aligned to the intersection point of the cladding ends of the two cladding wires; aligning a light outlet of a laser head of a laser to the intersection point of the cladding ends of the two cladding wires; carrying out double-wire laser cladding work; the device is applied to the method. Electric arc and laser heat energy are used in a combined mode, and the requirement for the power of the laser is greatly lowered; the cladding wire is fully melted, the cladding efficiency is high, the cladding layer is compact in structure, the porosity is low, and the residual stress of the cladding layer is small; and no splashing or dust throwing exists in the cladding process, and the material utilization rate is high.

Description

technical field [0001] The invention relates to the technical field of laser beam processing for high-end equipment manufacturing, in particular to a double-wire arc composite laser cladding method and device. Background technique [0002] Laser cladding technology is a multi-disciplinary cross-disciplinary technology involving laser technology, material surface modification technology, sensing technology, computer technology, and information and intelligence. It belongs to the field of high-end equipment manufacturing. Laser cladding technology is also an advanced manufacturing technology that is compatible with additive manufacturing, 3D printing, laser three-dimensional forming, laser direct writing technology, and additive remanufacturing. , embedded sensors, medical devices and weapons and other industrial fields of modern and future manufacturing technology. The formation of wear-resistant, anti-corrosion and functional coatings on the surface of parts is a typical ap...

AI Technical Summary

Problems solved by technology

[0005] Coaxial powder feeding laser cladding is characterized by fine structure of cladding layer, small surface roughness, low dilution rate of cladding layer, and good crack resistance of cladding layer, but the impact of powder particles and splash of molten pool will reduce Its material utilization

The characteristics of high-speed wire laser cladding are no splash and dust in the cladding process, good environmental protection, high material utilization rate, high cladding efficiency, low cladding layer dilution rate, and small heat input. However, due to the droplet size Larger, the surface roughness of the cladding layer is larger, the structure is coarser, the porosity is relatively high, the residual stress is large, and it is easy to crack

[0006] In addition, the current various laser cladding technologies use high-energy beam laser as the heat source, which requires high laser power, while the cladding efficiency and cladding speed of low-power laser cladding are low, which limits the wide application of ordinary laser cladding technology. Promote application

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