Laser-based inside-laser coaxial wire-feeding additive manufacturing system and forming method

Abstract

The invention discloses a laser-based inside-laser coaxial wire-feeding additive manufacturing system and a forming method. The laser-based inside-laser coaxial wire-feeding additive manufacturing system is formed by a laser, a wire feeder mechanism, a movement actuating mechanism, a molten pool shape monitoring feedback module and a system control module. After a part model is cut into slices, aninitial path is planned, input parameters and technological parameters in a technology database are compared, the molten pool temperature corresponding to technological parameters and input technology parameters under different feature structures is optimized, printing parameters and a robot code under an optimal path are generated, a high-speed infrared camera acquires molten pool shape parameters during the printing process and transmits to the system control module, the system control module compares the acquired molten pool shape data and the technology data of the technology database module, meanwhile, the molten pool temperature change is monitored, and the molten pool temperature is corrected through feedback-adjusting laser power and is monitored and feedback-adjusted in real time, so that the molten pool shape is uniform and consistent and the printing process is stably controlled during the printing process.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and in particular relates to an additive manufacturing system and a molding method based on laser light internal coaxial wire feeding. Background technique [0002] Laser additive manufacturing is an advanced manufacturing and processing technology. It uses laser as the heat source, powder or wire as the deposition raw material, generates a molding path according to the three-dimensional model, and prints layer by layer, and finally prints three-dimensional three-dimensional parts. In the prior art, laser light internal powder feeding additive manufacturing is a method of feeding metal powder into a circular laser beam to form metal parts. The forming process is stable, and it has been widely used in aerospace and other fields. However, the powder feeding technology requires high powder quality and high powder cost, which limits its application range. Although side-axis laser wir...

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Problems solved by technology

However, it only involves the principle and structure of the coaxial laser wire feeder. The annular beam is focused at the focal point and becomes an annular beam after defocusing. The energy distribution is not uniform, which is not conducive to molding; A laser additive manufacturing system for wire feeding, but it can only be used in a vacuum environment; patent CN 106256473 A proposes an aluminum alloy coaxial laser wire feeding system, which uses a laser with a high absorption rate of 700-900nm aluminum alloy, An aluminum alloy additive manufacturing system is proposed, but there is no feedback and temperature control module, which is prone to the problem of uneven distribution of laser energy due to defocusing

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