磁力研磨法光整外环槽的工艺参数研究

Process Parameters Study of Magnetic Abrasive Finishing to External Ring Groove

密封用的外环槽结构特殊,传统方法很难实现对其底面和侧面同步光整,这也直接影响到了环槽光整效率。为了提高研磨效率,提出利用磁力研磨法对环槽同步光整的工艺方案。根据磁力研磨理论,并结合有限元软件ANSYS对磁回路的模拟分析,确定了磁极的大小、形状和分布形式,并依此开发了可以对环槽底面和侧面同步光整的试验装置。通过对主轴转速、磨料粒径、磁极与环槽间隙这些工艺参数进行的试验研究,得到了最佳的工艺条件,并进行了试验验证。结果表明:经磁力研磨法同步光整60min后,环槽底面与侧面的表面粗糙度由最初的Ra4.8μm降至Ra0.7μm,且加工纹理基本去除,即磁力研磨法可以高效地实现外环槽表面的同步光整。

Due to the special structure of the external ring groove used in seal,the traditional finishing methods are difficult to synchronous finishing its bottom and sides. It also directly affects the finishing efficiency.The process scheme of synchronous finishing the ring groove by magnetic abrasive finishing（ MAF） method was proposed to improve finishing efficiency. The size,shape and distribution patterns of the magnet poles were deter mined,and the synchronous equipment was developed according to MAF theory and combined with the simulation of the magnetic circuit by ANSYS software. Experiments on the spindle speed,the gap between magnet pole and bottom surface,abrasive particle size were done and optimum condition was obtained,then the experimental verification was conducted. The results showed that： the surface roughness of bottom or side surface from initial Ra4. 8μm decreased to Ra0. 7μm,the textures are removed after 60 min.So the MAF method can efficiently synchronous finishing the external ring groove surface.