The concept of milling machine v1165 parts accuracy:
1. The concept of machining accuracy of CNC machining center
Using CNC machining center for parts processing, its machining accuracy is the main concern of customers. The machining accuracy of a CNC machining center refers to the degree of accuracy of the produced product. In the machining industry, machining accuracy and machining error are both terms used to evaluate the geometric parameters of the machined surface of a part. Machining accuracy is measured by tolerance grade, the smaller the grade value, the higher the accuracy. The machining error is expressed by a numerical value. The larger the numerical value, the greater the error. It can usually be understood that the machining accuracy is high, and the machining error is small at the same time.
There are 20 tolerance grades for parts processing using CNC machining centers from IT01, IT0, IT1, IT2, IT3 to IT18. IT01 indicates the highest machining accuracy of the part, and IT18 indicates the lowest machining accuracy of the part .
The actual parameter results obtained by any machining method in the machining industry are not absolutely accurate. From the perspective of the function of the part, as long as the machining error is within the tolerance range required by the part drawing, the machining accuracy can be considered qualified.
2. The content of the machining accuracy of the CNC machining center
1) Dimensional accuracy of parts
Refers to the degree of conformity between the actual size of the part processed by the CNC machining center and the center of the tolerance zone of the part size.
2) Shape accuracy
Refers to the degree of conformity between the actual geometric shape of the surface of the part processed by the CNC machining center and the ideal geometric shape.
3) Position accuracy
Refers to the actual position accuracy difference between the relevant surfaces of the parts processed by the CNC machining center.
4) Mutual relations
Generally, when designing machine parts and specifying the machining accuracy of parts, care should be taken to control the shape error within the position tolerance, and the position error should be less than the dimensional tolerance. Or it can be understood as precision parts or important surfaces of parts. The shape accuracy requirements should be higher than the position accuracy requirements, and the position accuracy requirements should be higher than the dimensional accuracy requirements.
