Control boring accuracy by selecting boring tools and bars and accounting for deflection and tolerance.
镗削是孔加工精加工工艺。标准公差 IT 由基本尺寸 D 与公差等级 n 决定:IT≈(0.45·D^(1/3)+0.001·D)×aₙ,aₙ 为等级系数(IT5~10 依次为 7/10/16/25/40/64)。据此给出圆度/同轴度控制建议,辅助工艺精度编制与公差分配。
| Item | Formula / Rule | Source / Standard |
|---|---|---|
| Boring bar deflection | Cantilever deflection δ = F·L³ / (3EI), which directly affects bore diameter accuracy. | Euler-Bernoulli beam theory & ISO 3002-1:1982 |
| Length-to-diameter limit | When the bar length-to-diameter ratio L/D exceeds 5, vibration damping or a pilot support is required. | ISO 3002-1:1982, cutting tool geometry |
| Hole tolerance | Hole-shaft fit tolerances follow the ISO tolerance grade system, commonly H7/g6. | ISO 286-1:2010, ISO system of limits and fits |
镗削(镗刀/镗杆/精度)控制。免费在线工具,纯前端处理,数据不上传,保护隐私安全。