Knowledge Of Machining Accuracy Of Machined Parts

DALIAN, China - Jan. 9, 2023 - PRLog -- Concept Of Machining (https://www.sansmachining.com/) Accuracy

Machining accuracy is mainly used for the degree of product production. Both machining accuracy and machining error are terms for evaluating geometric parameters of machined surfaces. Machining accuracy is measured by tolerance grade. The smaller the grade value, the higher the accuracy. The machining error is expressed by numerical value. The larger the numerical value, the greater the error. High machining accuracy means small machining error, and vice versa.

There are 20 tolerance classes from IT01, IT0, IT1, IT2, IT3 to IT18, of which IT01 represents the highest machining accuracy of the part, and IT18 represents the lowest machining accuracy of the part. Generally, IT7 and IT8 are of medium machining accuracy.

The actual parameters obtained by any processing method will not be absolutely 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 processing quality of the parts and the assembly quality of the machine. The processing quality of the parts includes the processing accuracy and surface quality of the parts.

Machining accuracy refers to the degree to which the actual geometric parameters (size, shape and position) of a part after machining conform to the ideal geometric parameters. The difference between them is called machining error. The machining error reflects the machining accuracy. The greater the error, the lower the machining accuracy, and the smaller the error, the higher the machining accuracy.

Type Of Machining Accuracy

(1) Dimensional Accuracy

It refers to the conformity between the actual size of the part after machining and the tolerance zone center of the part size.

(2) Shape Accuracy

It refers to the degree to which the actual geometric shape of the machined part surface conforms to the ideal geometric shape.

(3) Position Accuracy

It refers to the actual position accuracy difference between the relevant surfaces of the parts after machining.

Whole post at https://www.sansmachining.com/knowledge-of-machining-accu...