The principle of CNC lathe turning thread
During thread turning, the tool moves evenly by a lead distance for each revolution of the spindle. But how does it ensure that the spindle turns to the same position every time it feeds? For example, when thread cutting ends, the spindle stops, and it won’t mess up the teeth when it is restarted.
Ordinary thread is an ordinary round thread with a tooth profile angle of 60°, good self-locking performance, high thread shear strength, clearance at the small diameter of the thread pair, and a larger fillet at the root of the external thread to reduce stress concentration. National standard: GB/T192~197-2003.
Pipe threads are divided into sealed pipe threads and non-sealed pipe threads. The thread angle is divided into 55° and 60°. The sealing pipe thread has a taper, and the taper is generally 1:16. There is no gap between the nominal profile of the internal and external threads. The tight connection can be ensured by relying on the deformation of the thread without filling. type.