In the process of processing, different thread requirements are different. The methods and methods are different. The trapezoidal thread has a long length, a large pitch, a deep cutting, a large cutting force, a high accuracy requirement, and a difficult machining. The cutting depth of the tool is the same, so the force on the cutting edges on both sides of the thread turning tool will increase sharply with the increase of the material removal rate, resulting in a decrease in thread accuracy and tool damage. And each time the cutting depth must be reduced according to a certain proportion, the internal thread and the external thread are relatively common, and the general processing is less difficult, pay attention to the calculation of the thread bottom.

Today we will tell you about the main methods of thread cutting of CNC lathes:

1. Grooving rough cutting method, first use a grooving knife smaller than the width of the thread turning tool bit to roughly cut a groove, and then use a thread turning tool to perform thread processing. Large pitch threads are often used, but the operation and programming are extremely tedious.

2. Stagger cutting method, thread turning tools are staggered in the direction parallel to the left and right side of the tooth, until the bottom of the tooth, which is very suitable for large thread cutting, but the programming is more complicated.

3. The oblique feed method refers to the feed in the Z direction and the X direction are also linked to form a slanted feed method. At this time, the thread turning tool always has only one cutting edge to participate in cutting, and the chip removal is smooth. It is smaller than the straight-forward method, but when the thread depth is deep and the pitch is large, it is easy to produce the phenomenon of trowel.

4. Straight forward method refers to the linear movement of the Z direction does not change when the lathe is cutting, and the X direction feeds a cutting depth in a convenient, fast and efficient manner. Usually, ordinary threads with smaller pitches can be used, but the turning tool is easy. Worn, chips can scratch the thread surface.

CNC turning and milling processing is professional, if you need, please send email to wuxingrui@ruiyimodel.com.The cnc prototyping services by Ruiyi.