磁力珩磨技术在小直径直缝焊管内表面抛磨加工中的应用研究OA

To solve the problems of surface roughness and residual oxide scale on inner surface of small-diameter longitudinal welded pipes,and to improve their performance and adaptability to different scenarios,magnetic honing technology is used to polish inner surface of small-diameter longitudinal welded pipes.A single factor experiment is used to explore optimal range of feed rate,rotation speed,and reciprocating processing times.A response surface test is designed based on range to construct a mathematical prediction model for surface roughness.Reliability of model is verified through variance analysis,and the process parameters are optimized and experimentally verified.Results of single factor experiments show that to achieve better processing results,the feed speed is controlled between 3～5 mm/s,the rotation speed is controlled at 105～135 r/min,and the number of processing strokes is controlled at 60～80 times.The constructed prediction model has good reliability,with a relative error of less than 10.0%between the predicted values and the experimental values.The optimal process parameters are a feed rate of 3 mm/s,a rotation speed of 135 r/min,and 80 reciprocating processing cycles.Under the optimal process parameters,the Ra value of the inner surface of the small-diameter longitudinal welded pipe was reduced from the initial 3.586 μm to 1.397 μm,which was reduced by 61%,and the oxide scale is completely removed,and the surface of the substrate is flat.Research confirmed that magnetic honing technology can significantly improve the inner surface quality of small-diameter longitudinal welded pipes,providing a good foundation for their subsequent precision machining and having good application feasibility.