Research on tungsten carbide grinding technology of helicopter landing gear wheel axle
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.
tungsten carbidelanding gear wheel axlegrindingprocess capability index
万方数据
维普
