【摘要】 TC4钛合金深孔钻削过程中钻削温度高、排屑路径长,加剧刀具磨损,影响深孔加工质量和精度。为制定可用于实际生产的钛合金深孔钻削加工参数,开展TC4钛合金深孔枪钻加工试验。试验结果表明,钻削温度受钻削速度影响较大,进给量的影响不显著;孔径和圆度随着钻削速度的增加而增大,同轴度随着切削速度增加而先增大后减小;孔的表面粗糙度随着钻削参数的增加而增大,且大参数下深孔表面质量进一步恶化;各组试验加工硬化层在30μm左右,且随着钻削速度增加,切屑挤压变形严重。综合分析后制定的干切削条件下TC4钛合金深孔枪钻的钻削速度为20m/min,进给量为0.08mm/r。更多还原

【Abstract】 In the deep hole drilling process of TC4 titanium alloy, due to high drilling temperature and long chip removal path, the tool wear was aggravated, which affected the quality and accuracy of deep hole. In order to establish the processing parameters for deep-hole drilling of TC4 for actual production process, the gun drilling experiment of TC4 titanium alloy was carried out. The results indicated that drilling temperature was greatly affected by drilling speed, and the influence of feed rate was not significant. Deep-hole diameter and roundness increased with the increase of drilling speed, the co-axiality increased firstly and then decreased with the increase of drilling speed. Surface roughness of deep-hole increased with the increase of drilling parameters, surface quality of deep-hole was further deteriorated under large drilling parameters. Work hardening layer of each group was about 30μm, and with the increase of drilling speed, extrusion deformation of the chip was more serious. After the comprehensive analysis, drilling speed was 20 m/min, feed rate was 0.08 mm/r, which were the optimum processing parameters of TC4 titanium alloy deep-hole gun drilling under dry conditions.更多还原