CNC Knowledge: CNC Lathe Thread Programming Cutting

On the CNC towers, four standard wires can be turned: metric, thumb, module and diameter. That is to say the room) turns), the tool must move evenly at a distance from one (from the room). The following analysis of ordinary threads will strengthen the understanding of ordinary wires in order to better treat ordinary threads.
1. Ordinary thread size analysis
The Lathes CNC require a series of sizes for the treatment of ordinary threads.
1. The diameter of the part before the treatment of the wire
Given the expansion of the type of thread processing, the diameter of the D / D-0.1p part before the treatment of the thread is used, that is to say that the diameter of the thread is reduced by 0 , 1. Diameter of the wire as a function of the deformation capacity of the material.
2. Thread processing tool flow
The threading quantity can be used to refer to the threading basic diameter, that is to say the final supply position of the knife in the thread.
The diameter of the wire is: large diameter – 2 times the height of the tooth;
The quantity of supply to the treatment of the thread should be reduced continuously and the quantity of specific power supply is selected according to the tool and the working materials.
2. Knife assembly and correspondence of ordinary nets tools
The rotation tool is installed too high or too low or too high, and when the cutting tool reaches a certain depth, the rear blade of the turn tool will hold the part, will increase the friction and even fold the part, causing the knife be rodent; If it is too weak, it will not be easy to unload the fleas. Too large, causing a depth of the depth of the cutting tool to deepen automatically, lifting the part and cuts the knife. Currently, the height of the rotation tool must be adjusted in time to make the tip of the tool and the part of the part also high (the tip of the tool can be used to correspond to the ‘tool). During the rough and the semi-finition, the position of the point of the tool is approximately 1% of that of the part of the room (D indicates that the diameter of the treated part).
The work room is not firmly tight. The cutting depth and a gnawing knife occur.
The alignment methods of the conductive wire tool include the test cutting method and the automatic alignment of the tool. point to define the tool. The requirements for the tool when the treatment of the thread is not very high, in particular the parameter of the steering tool Z is not strictly limited and can be determined according to the programming and treatment requirements.
3. Programming and treatment of ordinary threads
In current CNC towers, there are generally three treatment methods for cutting threads: G32 Direct cutting method, G92 Straight cut and oblique cutting method G76. . different. We must analyze and strive carefully to treat the parts with great precision.
1. G32 Straight cutting method, since the two sides work at the same time, the cutting force is large and the cut is difficult, so during the cut, the two cutting edges are subject to wear. When cutting the wires with great strides, due to the great cutting depth and the faster wear on the cutting edge, causing errors in the average diameter of the wire; Small step thread treatment. Since the movement and cutting of the tool are supplemented by programming, the processing procedure is relatively long; Because the blade is subject to wear, frequent measurements should be carried out during treatment.
2. The G92 direct cutting method simplifies programming and improves efficiency compared to G32 instructions.
3. G76 Oblique cutting method, because it is a one -side edge treatment, the machining blade is subject to damage and wear, which makes the surface of the transformed wire not straight and The peak angle changes, resulting in poor precision of the dental shape. However, as it works with one side to one side, the tool load is small, elimination of fleas is easy and the cutting depth is reduced. Therefore, this treatment method is generally suitable for the treatment of large pitching threads. A CNC knowledge search for free for free to receive tutorials. When processing higher precision threads, two cuts are finished. However, be sure to make sure that the starting point of the tool must be precise, otherwise it will be easy to curl and make the parts exceed.
4. Once the treatment of the wire is completed, you can judge the quality of the wire by observing the shape of the wire and taking appropriate measures. The increase in large quantities depends on the plasticity of the material.
4.
For standard general threads, the annular gauge or the sheet gauge is used for the measurement. When measuring external threads, if the thread gauge “passing the end” is just screwed, but that the gauge of the “stop” ring is not screwed, this means that the treated wire responds to requirements, otherwise it will not be qualified. When you measure the internal thread, use a thread gauge to measure it in the same way. In addition to the gauge of the threading ring or the sheet gauge, other measurement tools can be used to measure the average diameter of the wire with a thread micrometer, and the dental thickness of the intermediate trapezoidal diameter and The thickness of tooth in diameter of the green are used to measure the three needles. Measuring method to measure the average diameter of the wire.