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工程塑料CNC加工的特殊考虑与最佳实践
Jun 13,2026

工程塑料CNC加工的特殊考虑与最佳实践

与金属相比,工程塑料(如PEEK、PTFE、POM、PMMA、PC、ABS)的CNC加工需要完全不同的策略。主要挑战包括:导热性差(容易熔化或烧焦)、弹性模量低(容易变形)、以及内应力释放导致尺寸变化。2026年的最佳实践包括:使用单槽或双槽刀具以利于排屑;采用压缩空气冷却而非冷却液(避免塑料吸湿);保持锋利刀具(钝刀会产生摩擦热);以及控制吃刀量和进给速度。对于PEEK(聚醚醚酮),推荐采用高速铣削(10,000-20,000 rpm)和小切深(0.1-0.5mm),并使用金刚石涂层刀具。对于PTFE(特氟龙),由于其极软且容易变形,需要采用锋利的车刀和极低的进给率。实际案例显示,采用专用塑料加工策略后,工程塑料零件的表面粗糙度可从Ra 3.2μm降至Ra 0.8μm,且没有熔融痕迹。2026年,具备工程塑料专业知识的CNC服务商在医疗植入物(PEEK)、半导体夹具(POM、PTFE)和航空内饰(ABS、PC)领域需求强劲。

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