Precision requirements for machining dimensions of CNC precision parts

Generally, we have high precision requirements for CNC precision parts processing. These include technical requirements, personnel requirements, enterprise management and operation mode, whether innovation, whether it can adapt to fierce competition and other factors.

The machining accuracy of CNC precision parts is measured by the tolerance level. Big. High machining accuracy means small machining error, and vice versa; the actual parameters obtained by any machining method will not be absolutely accurate. From the function of the part, as long as the machining error is within the tolerance range required by the part drawing, it is considered that the machining is guaranteed. precision.

The size of CNC machining error of precision parts reflects the level of machining accuracy. The larger the error, the lower the machining accuracy; the smaller the error, the higher the machining accuracy; the main aspects that affect the machining accuracy: dimensional accuracy, the degree of conformity between the actual size of the part after machining and the center of the tolerance zone of the part size.

Dimensional accuracy is controlled by dimensional tolerances. Dimensional tolerance is the allowable variation in part size during machining. Under the condition of the same basic dimensions of mold parts, the smaller the dimensional tolerance, the higher the dimensional accuracy; shape accuracy: refers to the degree of conformity between the actual geometric shape of the surface of the processed part and the ideal geometric shape. There are six items for evaluating shape accuracy, including straightness, flatness, roundness, cylindricity, and line profile. The shape accuracy is controlled by the shape tolerance. The shape tolerances are divided into 12 precision levels except roundness and cylindricity, which are divided into 13 precision levels. Level 1 is the highest and Level 12 is the lowest.

The above are the dimensional accuracy requirements for CNC precision parts processing. For more information, please consult Dongguan YIFENG METAL Technology Online.