Обработка резьбы является одной из наиболее часто используемых операций при обработке на станках с ЧПУ.. В зависимости от различных методов обработки, it can be divided into tapping, thread milling, and thread turning (pick-and-tap method). The following describes these methods in detail.
1. Tap Processing (Tapping)
Tapping is the most common method, generally suitable for small-diameter internal thread holes (D < 30 мм).
(1) Rigid Tapping
- Directly driven by the spindle feed, with high efficiency and precision.
- It is currently the mainstream CNC tapping method.
(2) Flexible Tapping
- The feed and spindle are not strictly synchronized.
- It requires a floating chuck to compensate for feed errors.
- Less efficient and less precise than rigid tapping.
Bottom hole diameter selection:
Например, for an M8 thread, the bottom hole drill bit diameter is Ø6.8–Ø6.9 mm. Choosing the upper limit (Ø6.9 mm) can reduce the cutting load on the tap.
Tap selection:
- Through holes → spiral-point tap.
- Blind holes → spiral-flute tap.
2. Thread Milling
Thread milling uses a rotating tool to cut threads, suitable for larger holes and materials that are difficult to machine.
Преимущества:
- High efficiency, especially for larger threads.
- The same tool can machine left-hand and right-hand threads.
- Convenient chip evacuation, reducing risk of tool breakage.
- Particularly suitable for difficult-to-cut materials.
Programming note:
Thread milling requires helical interpolation. Different CNC systems (Fanuc, Siemens, и т. д.) may use slightly different parameter codes, so programming should follow the machine tool’s documentation.
3. Thread Turning (Pick-and-Tap Method)
Thread turning is carried out on a CNC lathe, suitable for machining external and internal threads of larger diameters.
- By using a single-point tool, threads are cut gradually.
- It is an alternative when special taps or thread milling cutters are not available.
4. Краткое содержание
The main methods of CNC thread machining are:
- Tapping → efficient for small-diameter holes.
- Thread milling → flexible, эффективный, suitable for large or special threads.
- Thread turning (pick-and-tap method) → suitable for larger threads or when special tools are unavailable.
Each method has its own advantages and limitations. The choice depends on the thread size, материал, and machining conditions.
О RapidEfficient
RapidEfficient специализируется на высокоточной обработке на станках с ЧПУ. 18 многолетний опыт. Ее продукция охватывает медицинские, коммуникации, оптика, дроны, умные роботы, детали автомобильной и офисной автоматизации.
Обрабатывающие центры с ЧПУ компании включают четырехосные, пятиосные и рычажные станки, и оснащены прецизионными проекторами, трехкоординатные измерительные машины, спектрометры и другое прецизионное испытательное оборудование.
- Machining accuracy: up to 0.01mm
- Testing accuracy: up to 0.001mm
