What is CNC machining?

　　CNC processing, also called numerical control processing, refers to processing with numerical control processing tools. Because CNC machining is programmed and controlled by a computer, 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. Next, let's take a look at the twelve valuable experience summed up by an old driver with ten years of CNC machining experience...

　　 One, how to divide the cnc processing process?

　　 The division of CNC machining processes 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 cnc to process 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. 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, planes and positioning surfaces are processed first, and then holes are processed; simple geometric shapes are processed first, and then complex geometric shapes; the parts with lower precision are processed first, and the parts with higher precision requirements are processed first.

3. For parts that are prone to CNC machining deformation by the rough and fine CNC machining sequence method, due to the deformation that may occur after rough machining, the shape needs to be corrected, so in general, all the rough and fine machining must be processed separate. In summary, when dividing the process, we must flexibly grasp the structure and manufacturability of the parts, the function 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 processing 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 need for positioning and clamping. The important point is that the rigidity of the workpiece is not destroyed. The sequence should generally follow the following principles:

　　1. The cnc processing 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, first carry out the inner shape inner cavity adding process, and then carry out the outer shape processing process.

　　3. It is best to connect the processes of the same positioning, clamping method or cnc machining with the same tool to reduce the number of repeated positioning, tool change times and the number of moving platens.

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

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

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

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

　　2, try to reduce 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 cutting during cnc processing (such as collision). When encountering such a situation, use a vise or add a base plate to draw a screw.

If you want to switch from a CNC machining operator to a programmer, you must know the above. In addition to the above, what else do you think you need to know? Is it important to improve efficiency? Shouldn't the knife also need attention?