CNC Spinning Defects: Chatter Marks & Wall Drift
数控旋压缺陷：螺旋纹与壁厚失控
标签：螺旋纹, 颤振, 壁厚, 故障排查, 数控, 参数修正
数控旋压两大高频缺陷：①螺旋纹（chatter）——进给与主轴转速匹配不当，按 0.3–0.5 mm/r 配 800–1200 rpm 消除，同时检查芯模顶尖跳动 ≤0.02 mm；②壁厚沿轴向漂移——多为道次轨迹减薄率递增失当，把后段道次减薄率限制在 15% 以内，或降低末两道次进给 20%。芯模与毛坯间有油污也会打滑引起局部变薄，装夹前用丙酮擦拭。
Two common CNC spinning defects: (1) spiral chatter marks — mismatch of feed and spindle speed; run 0.3–0.5 mm/r at 800–1200 rpm and verify mandrel runout ≤0.02 mm. (2) Axial wall-thickness drift — usually pass reduction ramped too aggressively; cap late passes at 15% reduction or cut feed 20% on the last two passes. Oil between mandrel and blank also slips and thins locally — wipe both with acetone before loading.