精加工

定义

以小切削量获得尺寸与表面质量。

以前置元数据中的定义作为统一语义，并在装夹、加工与检验环节保持一致。

公式/规则

• 精加工优先保证几何精度、表面质量和重复性，而不是最大去除率。
• 应保留稳定一致的精加工余量，使最后一刀的切削负载和热输入可预测。

典型范围

• Typical finish allowance should be stable enough that the last pass removes a consistent skin, not mixed stock and air-cut.
• Prioritize predictable heat, runout, and tool deflection over cycle-time reduction in the final pass.

现场场景

• Reserve the final pass for stable coolant, runout, and thermal condition after roughing heat is reduced.
• Use a lighter finish step when wall spring-back or burr formation appears near the final geometry.

常见错误/排障

• If finish size drifts late in the run, check heat growth, wear compensation, and coolant stability first.
• If surface quality drops after a parameter increase, confirm runout and chip evacuation before reducing speed blindly.

相关工具

• Surface Roughness Calculator
• Feed Speed Calculator