What is CNC machining?


Author: MULAN -Plastic Molding Manufacturer

CNC machining">CNC machining, also known as numerical control machining, refers to the processing carried out with numerical control processing tools. Because numerical control machining is programmed and then controlled by a computer, CNC machining has the advantages of stable processing quality, high processing accuracy and high repeatability. , can process complex profiles, high processing efficiency, etc. In the actual processing process, human factors and operating experience will largely affect the final processing quality.

1. How to divide the cnc processing "> cnc processing procedures? The division of CNC processing procedures can generally be carried out in the following ways: 1. The method of tool concentration and sequencing is to divide the process according to the tool used, and use the same tool cnc to process the parts. All parts that can be completed. Use the second tool and the third tool to complete other parts that they can complete. This can reduce the number of tool changes, compress the idle time, and reduce unnecessary positioning errors.

2. Sorting method of processing parts For parts with a lot of CNC processing content, the processing part can be divided into several parts according to its structural characteristics, such as inner shape, shape, curved surface or plane. Generally, the plane and positioning surface are processed first, and then the holes are processed; the simple geometric shapes are processed first, and then the complex geometric shapes are processed; the parts with lower precision are processed first, and then the parts with higher precision requirements are processed. 3. Sequence method of rough and finish cnc machining For parts that are prone to cnc machining deformation, it is necessary to correct the shape due to the possible deformation after rough machining. separate.

To sum up, when dividing the process, it is necessary to flexibly grasp the structure and manufacturability of the parts, the function of the machine tool, the content of the CNC machining of the parts, the number of installations and the production organization of the unit. In addition, it is 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 processing sequence should be considered according to the structure of the parts and the condition of the blank, as well as the need for positioning and clamping. The key point is that the rigidity of the workpiece will not be damaged.

The sequence 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 process of general machine tool processing interspersed in the middle should also be considered comprehensively. 2. The inner shape and inner cavity are processed first, and then the shape is processed. 3. The same positioning and clamping method or the same tool cnc machining process are connected to reduce the number of repeated positioning, the number of tool changes and the number of moving the pressure plate.

4. For multiple processes in the same installation, the process with less rigid damage to the workpiece should be arranged first. 3. What aspects should be paid attention to when determining the workpiece clamping method? The following three points should be paid attention to when determining the positioning reference and clamping scheme: 1. Strive to unify the reference of design, process, and programming calculation. 2. Minimize the number of clamping times, and try to achieve all the surfaces to be processed by cnc after one positioning.

3. Avoid using the machine-occupied manual adjustment scheme. 4. The fixture should be open, and its positioning and clamping mechanism should not affect the tool movement during cnc machining (such as collision).

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