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基于“光束中空,光内送粉”的专利技术,采用新型光内同轴送粉装置,在45#钢基体上进行变径回转体堆积。分别对变径回转体斜度、Z轴增量及功率进行控制,并分析各自的影响:斜面堆积中倾斜角度与偏移量、扫描速度成正相关,与送粉速度和粉末利用率成负相关,极限倾斜角度与偏移量成正相关,与熔覆层高度成负相关;随着堆积的进行,粉末利用率降低,离焦量变大;在高层熔覆堆积过程中,熔池由三维散热变为二维散热,散热降低,熔池温度上升,应相应减小功率。得到的成型件外观光滑、粗糙度低、成型质量较高,为变截面的三维堆积试验提供参考。
Based on the patented technology of “Beam hollow and powder feeding in light”, a new type of optical co-axial powder feeding device is used to deposit the variable-diameter rotary body on the 45 # steel substrate. Respectively, on the reduction of slewing body tilt, Z axis increment and power control and analysis of their respective effects: bevel stacking tilt angle and offset, the scanning speed is positively correlated with the powder feeding rate and powder utilization is negatively correlated , And the limit tilt angle is positively correlated with the offset and negatively correlated with the cladding height. As the deposition progresses, the powder utilization rate decreases and the defocusing amount becomes larger. During the process of high-level cladding and deposition, the weld pool consists of three- For the two-dimensional cooling, heat reduction, pool temperature rise, should be reduced accordingly. The resulting molded parts have the advantages of smooth appearance, low roughness and high forming quality, and provide reference for the three-dimensional stacking test of the variable cross section.