直升机起落架轮轴碳化钨磨削工艺研究  

Research on tungsten carbide grinding technology of helicopter landing gear wheel axle

作　　者：徐帅 张金辉 XU Shuai;ZHANG Jinhui(Machine Center Department,Changhe Aircraft Industry(Group)Co.,Ltd.,Jingdezhen 333000,China)

机构地区：[1]昌河飞机工业(集团)有限责任公司机加中心,景德镇333000

出　　处：《航空工程进展》2024年第3期174-181,共8页Advances in Aeronautical Science and Engineering

摘　　要：受超声速火焰喷涂工艺方法的限制,喷涂碳化钨的轮轴必须通过磨削工艺保证表面质量和尺寸精度,然而轮轴的弱加工刚性和涂层的高耐磨性导致磨削过程中易出现让刀、颤刀等现象,造成零件磨削质量不合格。首先采用正交试验法研究四种精磨工艺参数对磨削表面粗糙度的影响,然后研究装夹工具和磨削策略对零件圆柱度的影响,最后加工并收集15件轮轴的各段外圆尺寸并计算其过程能力指数。结果表明:选择高砂轮线速度、小切深以及适中的砂轮轴向进给速度与工件线速度可以获得粗糙度为0.4μm的零件表面,增加装夹工具的夹持长度和刚性并采用“粗磨—精磨—光磨”策略可保证零件外圆的圆柱度不大于0.01 mm,轮轴过程能力指数的计算结果不小于1.33,整个磨削工艺可靠、稳定。Due to the limitation of the supersonic flame spraying process method,the axle sprayed with tungsten car⁃bide must ensure the surface roughness and dimensional accuracy through the grinding process,but the weak ma⁃chining rigidity of the axle and the high wear resistance of the coating lead to the phenomenon of making the cutting tool and shaking the cutting tool in the grinding process,resulting in the unqualified grinding quality of the parts.Firstly,the influence of four fine grinding process parameters on the grinding surface roughness is studied by orthog⁃onal experimental method.Then,the influence of clamping tools and grinding strategies on the cylindricity of parts is studied.Finally,the outer dimensions of the individual sections of the 15 axles are machined and collected and their process capability indices are calculated.The results show that the surface of the part with roughness of Ra0.4 can be obtained by selecting high grinding wheel linear velocity,small depth of cut and moderate grinding wheel axi⁃al feed rate and workpiece linear velocity,increasing the clamping length and rigidity of the clamping tool,and adopting the strategy of"coarse grinding-fine grinding-smooth grinding"to ensure that the cylindricity of the outer circle of the part is not more than 0.01 mm.The axle process capability index is not less than 1.33,and the entire grinding process is reliable and stable.

关 键 词：碳化钨 起落架轮轴 磨削 过程能力指数 

分 类 号：V262[航空宇航科学与技术—航空宇航制造工程]