Magnetic field control type additive forming method and device adopting electric arc robot

Abstract

The invention discloses a magnetic field control type additive forming method adopting an electric arc robot. The method comprises the steps that welding parameters of electric arc additive manufacturing are input into a controller; the controller drives an excitation power supply in a magnetic field generating device to generate longitudinal magnetic fields with different intensities according tothe real-time change of the manufacturing parameters; when air pores are generated on the overlaying surface of an additive part, a hollow shaft motor is used to control exciting coils to rotate to generate an annular magnetic field, and oscillation stirring is carried out on a molten pool at different degrees; and finally the magnetic fields control the electric arc robot to carry out layer-by-layer accumulation for automatic additive forming on molten wire material according to the forming path. According to the magnetic field control type additive forming method adopting the electric arc robot, control over the form and the motion state of an electric arc in the material adding process can be facilitated; and the annular magnetic field is adopted for stirring so that the floating speedof inclusions such as the air pores in the molten pool can be increased, rotary spray transfer with good stability and good controllability can be obtained, the defects of the air pores and the likein an additive manufacturing part can be greatly reduced, and continuous consistency of the forming morphology of an additive forming part formed through the electric arc robot is improved.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and in particular relates to a magnetic field control type arc robot additive forming method and device. Background technique [0002] Modern industrial high-end equipment is rapidly developing in the direction of large-scale, high-parameter, high-reliability and long-life service under extremely harsh conditions. The manufacturing technology of high-performance and difficult-to-machine metal large-scale key components is recognized as the foundation and core of major high-end equipment manufacturing industries key technologies. Arc additive manufacturing technology refers to the use of electric arc as a heat source to melt the metal wire, and then accumulate layers on the substrate according to the set forming path, layer by layer until the metal parts are formed. The formed part is composed of full weld metal, which has high density, good metallurgical bonding performance, unifo...

AI Technical Summary

Problems solved by technology

The droplet transfer and the stability control of the welding process are poor, which is a characteristic of welding technology and a common shortcoming. The addition of forming materials in arc additive forming is the transition of metal materials into the molten pool in the form of high-temperature liquid droplets. to complete

[0004] In addition, the use of arc additive manufacturing technology to manufacture metal parts still has great difficulties in controlling the surface quality of formed parts, mainly because the stability of arc and molten pool changes with the "time-space" change, so it is difficult to achieve Surface Quality Control of Formed Parts

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