The machining accuracy of forgings is the degree of conformity between the actual size, shape, and position of the surface of the parts after machining and the ideal geometric parameters required by the drawings. The ideal geometric parameters, in terms of size, are the average size; in terms of surface geometry, they are circles, cylinders, planes, cones, and straight lines, etc.; in terms of mutual positions between surfaces, they are parallel and perpendicular. , coaxial, symmetrical, etc. The deviation of the actual geometric parameters of the part from the ideal geometric parameters is called the machining error.
Forging machining accuracy and machining error are terms for evaluating the geometric parameters of the machined surface. The machining accuracy is measured by the tolerance level. The smaller the level value is, the higher the precision is; the machining error is represented by a numerical value, and the larger the numerical value is, the greater the error is. High machining accuracy means small machining errors and vice versa.
The actual parameters obtained by any processing method will not be accurate. From the function of the part, as long as the processing error is within the tolerance range required by the part drawing, it is considered that the processing accuracy is guaranteed.
The quality of the machine depends on the machining quality of the parts and the assembly quality of the machine. The machining quality of the parts includes the machining accuracy and the surface quality of the parts.
The machining accuracy of forgings refers to the degree to which the actual geometric parameters (size, shape, and position) of the parts after machining are consistent with the ideal geometric parameters. The difference between them is called machining error. The size of the machining error 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.
Machining accuracy includes three aspects:
Dimensional accuracy refers to the degree of conformity between the actual size of the processed part and the center of the tolerance zone of the part size.
Shape accuracy refers to the degree to which the actual geometric shape of the surface of the machined part conforms to the ideal geometric shape.
Position accuracy refers to the actual position and ideal between the relevant surfaces of the parts after machining.
