Analysis of dimensional accuracy requirements for CNC precision parts machining
by：QY Precision 2020-03-25
Generally, we have high precision requirements for CNC precision parts processing.
These include technical requirements, personnel requirements, enterprise management and operation mode, innovation, and adaptability to fierce competition.
The machining accuracy of CNC precision parts is measured by Tolerance grade. The smaller the grade value, the higher the accuracy;
The processing error is expressed by numerical value. The larger the value, the larger the error.
The processing accuracy is high, that is, the processing error is small, and vice versa;
The actual parameters obtained by any machining method will not be absolutely accurate. From the function of the parts, as long as the machining error is within the tolerance range required by the part drawing, the machining accuracy is considered to be guaranteed.
The size of CNC machining errors in precision parts reflects the level of machining accuracy.
The larger the error, the lower the machining accuracy, and the smaller the error, the higher the machining accuracy;
The main aspects affecting the machining accuracy: dimensional accuracy, the degree of conformity between the actual size of the machined part and the center of the tolerance zone of the part size. Dimensional accuracy is controlled by dimensional tolerances.
Dimensional tolerance is the allowable variation of part size in cutting.
In the case of the same basic size of the mold parts, the smaller the dimensional tolerance and the higher the dimensional accuracy;
Shape Accuracy: refers to the degree to which the actual geometric shape of the machined part surface matches the ideal geometric shape.
The items for evaluating shape accuracy include straightness, flatness, roundness, roundness, and contour.
Shape Accuracy is controlled by shape tolerance. Each shape tolerance is divided into 12 accuracy levels except for roundness and roundness. Level 1 is the highest and level 12 is the lowest.
The above is the dimensional accuracy requirements for CNC precision parts processing. For more information, please consult Shenzhen fuchengxi technology, a professional manufacturer of hardware processing and CNC processing.