Induction-ultrasound combination assisted laser metal forming method

Abstract

The invention discloses an induction-ultrasound combination assisted laser metal forming method. Induction heating and ultrasonic vibrating are used in assisted laser metal forming simultaneously, an ultrasonic transducer is arranged inside an ultrasonic loading table, and a base body is rigidly connected to the ultrasonic loading table; the positions of induction coils are adjusted, and the middle planes of the induction coils and the forming surfaces of the base body are spaced by an appropriate distance; an induction heating power source is turned on firstly, an ultrasonic generator is turned on later, and the temperature of the base body is controlled through an infrared temperature control system; the positions of the center planes of the induction coils are adjusted in real time through a linear stepping motor in the forming process, and the relative distance between the center planes of the induction coils and the formed surfaces keeps unchanged; laser metal forming is carried out under the continuous effect of induction heating and ultrasonic vibrating, the induction heating power source is turned off after forming is completed, and then the ultrasonic generator is turned off. According to the method, through coupling reinforcement of auxiliary effects of induction heating and ultrasonic vibrating, laser near-net forming of high-performance and high-compactness metal parts is realized.

Description

technical field [0001] The invention is applicable to the field of metal additive manufacturing, and relates to a method for induction-ultrasonic composite assisted laser metal forming. Through the coupling strengthening of induction heating and ultrasonic vibration, high Performance Metal Forming. Background technique [0002] Laser metal forming technology is one of the important research directions in the field of additive manufacturing at home and abroad. This technology melts synchronously conveyed metal powder through high-power laser, accumulates materials point by point on the substrate, and manufactures shaped parts through continuous growth. After years of development, the technology has made some progress in forming mechanism, process selection, software and hardware systems, etc. However, there are defects such as cracks, pores, and inclusions in the formed parts, and the residual stress in the parts is relatively large. These factors seriously affect the perfor...

AI Technical Summary

Problems solved by technology

In the specific implementation process, the ultrasonic transducer runs through the central hole opened on the heating plate and is fixed, and there is a heat shield between the heating plate and the substrate. On the one hand, the ultrasonic transducer is placed in a high temperature environment for a long time, so that Its service life is reduced and the vibration effect is weakened; on the other hand, as the height of the formed part increases and there is a heat shield between the heating plate and the base, not only the heating is time-consuming, but also the real-time preheating effect is not ideal

Only suitable for surface cladding and surface modification processes, not suitable for the manufacture of laser metal forming solid parts

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