四波长激光准六自由度激光增材制造异形永磁件

Heterogeneous Permanent Magnetic Parts by Laser Additive Manufacturing with Four-Wavelength-Laser and Quasi-Six-Degree-of-Freedom

提出了四波长激光多管喷粉准六自由度数控运动的激光增材新结构方法,分析了整体系统结构的线性空间与李子群函数,建立了系统的线性空间数学模型。采用多管喷粉机构喷涂定量Nd-Fe-B稀土永磁体成分,并利用闭环反馈控制四个激光束的功率与角度,进行了选择性与指向性激光辐照,实现了异形永磁件的激光增材成型,成型精度达20μm,最小宽度低于80μm,磁能积达474kJ·m3。

A new structural method of laser additive manufacturing （LAM） with four-wavelength laser, multitube dusting, and quasi-six-degree-of-freedom numerical control motion is proposed. The overall system architecture is analyzed in terms of linear space and Lie subgroup function. A linear and spatial mathematical model for this system is established. The components of Nd-Fe-B rare earth permanent magnets are sprayed quantitatively by using the multi-dusting mechanism. In addition, by the control of the powers and angles of four laser beams, the selective and directional laser irradiation is conducted, and the LAM of heterogeneous permanent magnetic parts is realized with forming accuracy of 20 μm, minimum width of less than 80μm, and magnetic energy product of 474 kJ·m^3.