Because of the low surface roughness of three-dimensional (3D) printed microchannels, in some environments, the use requirements cannot be met, and, at the same time, they are difficult to process. Therefore, a surface roughness analysis of 3D printed microchannels and post-processing using abrasive flow technology are proposed. The value of the inner surface roughness of the straight pipe part was calculated by using the least-squares method combined with the definite integral. Using the equal area principle, MATLAB curve fitting was used to numerically calculate the semicircular pipe section, and the relationship between the value of surface roughness and the bending radius of the scanning layer thickness is given. Use MATLAB image processing technology to study the processing area. The roughness of the inner wall of the pipeline was analyzed by laser confocal, stereo, and scanning electron microscopes. The results show that the roughness of the inner surface of the pipe increases with an increase in the thickness of the sweeping layer, an increase in the inclination angle, and a decrease in the radius of curvature. In the case of abrasive flow processing, the longer the processing time, the greater the grinding amount and the greater the amount of grinding outside the pipe wall in each one-way machining; further, the processing has obvious directionality.

由于三维（3D）打印微通道的表面粗糙度低，因此在某些环境中无法满足使用要求，并且同时难以加工。因此，提出了3D打印微通道的表面粗糙度分析和使用磨料流技术的后处理。直管部的内表面粗糙度的值是使用最小二乘法结合定积分而算出的。利用等面积原理，利用MATLAB曲线拟合对半圆管截面进行数值计算，给出了表面粗糙度值与扫描层厚度弯曲半径之间的关系。使用MATLAB图像处理技术来研究处理区域。通过激光共聚焦，立体和扫描电子显微镜分析了管道内壁的粗糙度。结果表明，管的内表面的粗糙度随着清扫层的厚度的增加，倾斜角的增加以及曲率半径的减小而增加。在磨料流加工的情况下，每次单向加工的加工时间越长，磨削量越大，管壁外的磨削量也就越大。此外，该处理具有明显的方向性。在磨料流加工的情况下，每次单向加工的加工时间越长，磨削量越大，管壁外的磨削量也就越大。此外，该处理具有明显的方向性。在磨料流加工的情况下，每次单向加工的加工时间越长，磨削量越大，管壁外的磨削量也就越大。此外，该处理具有明显的方向性。