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CNC Machining service

CNC machining, also called CNC machining, refers to machining with CNC machining tools. Because CNC machining is controlled by a computer after programming, CNC machining has the advantages of stable machining quality, high machining accuracy, high repeatability, complex surface machining, and high machining efficiency. In the actual processing process, human factors and operating experience will affect the final processing quality to a large extent. Below, let us take a look at the twelve valuable Scriptures summarized.

1. How to divide the CNC machining process?

The division of CNC machining procedures can generally be carried out according to the following methods:

1. The tool centralized ordering method is to divide the processes according to the tools used, and use the same tool to CNC machine all the parts that can be completed on the part. Use the second knife and the third knife to complete other parts they can complete. This can reduce the number of tool changes, reduce idle time, and reduce unnecessary positioning errors.

2. According to the ordering method of machining parts, for parts with a lot of CNC machining content, the machining part can be divided into several parts according to its structural characteristics, such as inner shape, shape, curved surface or plane, etc. Generally, the plane and positioning surface are processed first, and then the hole is processed; the simple geometric shape is processed first, and then the complex geometric shape is processed; the parts with lower precision are processed first, and then the parts with higher precision requirements are processed.

3. The rough and fine CNC machining sequence method is used for parts that are prone to CNC machining deformation. Due to the deformation that may occur after rough machining, the shape needs to be corrected. Therefore, in general, all the rough and finishing processes must be adjusted. Separate. To sum up, when dividing the process, we must flexibly grasp the structure and manufacturability of the parts, the functions of the machine tool, the number of parts CNC machining content, the number of installations and the production organization of the unit. It is also recommended to adopt the principle of process concentration or the principle of process dispersion, which should be determined according to the actual situation, but must strive to be reasonable

2. What principles should be followed in the arrangement of CNC machining sequence?

The arrangement of the processing sequence should be considered according to the structure of the part and the condition of the blank, as well as the needs of positioning and clamping. The important point is that the rigidity of the workpiece is not destroyed. The order should generally be carried out according to the following principles:

1. The CNC machining of the previous process cannot affect the positioning and clamping of the next process, and the general machine tool processing processes should also be considered comprehensively.

2. Carry out the inner cavity adding procedure first, and then the contour processing procedure.

3. It is best to connect the processes of the same positioning, clamping method or CNC machining of the same tool in order to reduce the number of repeated positioning, the number of tool changes and the number of times of moving the platen.

4. For the multiple processes carried out in the same installation, the process should first be arranged with less rigid damage to the workpiece.

3. Which aspects should be paid attention to when determining the clamping method of the workpiece?

The following three points should be paid attention to when determining the positioning reference and clamping plan:

1. Strive to unify the design, craftsmanship, and programming calculation benchmarks.

2. Minimize the number of clamping times, as far as possible to be able to CNC process all the surfaces to be processed after one positioning.

3. Avoid using manual adjustment schemes.

4. The fixture should be opened smoothly, and its positioning and clamping mechanism should not affect the tool movement in CNC machining (such as collision). When encountering such a situation, use a vise or add a base plate to draw a screw.