弹性磨具磨抛SKD-11钢工艺参数优化研究

Study on Optimizing Technological Parameters of SKD-11 Steel by Elastic Abrasive

在超精磨抛加工中,主要通过材料的微量去除来达到表面光洁的目的。为提高弹性磨抛SKD-11的表面加工效率和磨抛效果,获得弹性磨具磨抛SKD-11钢工件曲面最佳工艺参数组合,首先采用尺寸为?18×55mm的钢试样进行柔性磨抛单因素优选法与正交实验深入分析磨具直径、磨抛深度等磨抛过程参量对表面质量的影响,并利用Fluent模拟切削区流场,通过使用高速射流进一步提高表面质量。实验结果表明:当球头磨具直径为D=50mm,磨抛深度t=0.3mm,进给速度V=10mm/min,射流速度v=19m/s时,试样表面粗糙度Ra为0.056μm,有效的提高了SKD-11钢材表面质量,为SKD-11钢零件的光整加工提供了重要的理论依据。

Material removal by micro-damage grinding is the principle in selected polishing processes like grinding wheel machining. In order to improve the processing efficiency, reduce surface damage and the surface quality and meet operating requirements in the field of aviation, this research investigated a new effective method to grind steels in hard alloy grinding and carried on the grinding experiments in the size of ?18×55 mm SKD-11 steel with rubber ball-end abrasives. It uses a single-factor optimum selection method and an orthogonal optimum selection method to analyze the impacts of parameters such as grinding tool diameter, grinding depth and feed rate on surface quality. When the abrasive diameter D = 50 mm, grinding depth t = 0.3 mm, feed rate V= 10 mm/min, jet velocity v = 19 m/s, the sample surface roughness Ra is 0.056μm. It can improve the surface quality of the SKD-11 steel. Meanwhile, the experimental results provide a reference for the use of SKD-11 Steel parts processing.