A magnetic field controlled arc robot additive forming method and device

Abstract

The invention discloses a magnetic field control arc robot additive forming method. The method is as follows: input the welding parameters of arc additive manufacturing into the controller; the controller drives the excitation power supply in the magnetic field generating device to generate longitudinal magnetic fields of different strengths according to the real-time changes of the manufacturing parameters; At the same time, the hollow shaft motor controls the rotation of the excitation coil to generate a circular magnetic field, which oscillates and stirs the molten pool to varying degrees; finally, the magnetic field control arc robot can automatically add materials to form the molten wire according to the forming path. The invention is beneficial to control the shape and movement state of the arc in the process of adding materials; the use of annular magnetic field stirring can accelerate the floating speed of inclusions such as pores in the molten pool, and obtain a rotating jet transition with good stability and good controllability, thereby Significantly reduce defects such as air holes in additively manufactured parts, and improve the continuity and consistency of the formed shape of arc robot additively formed parts.

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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