How to improve the machining accuracy of standard mold?

The machining accuracy of standard die is the degree of conformity between the actual position, size and shape of the surface of the machined part and the ideal geometric parameters required by the drawing. The following is to talk about the processing accuracy of the standard mold from three aspects.

1. Position accuracy

When the medium wire cutting machine uses the standard die to process the die, it refers to the difference in actual position accuracy between the relevant surfaces of the machined parts. There are eight items to evaluate position accuracy, such as parallelism, perpendicularity, inclination, coaxiality, symmetry, position, round runout and full runout. Position accuracy is controlled by position tolerances, which are also divided into 12 accuracy levels.

2. Dimensional accuracy

Refers to the degree of conformity between the actual size of the machined part and the tolerance zone center of the part size. Dimensional accuracy is controlled by dimensional tolerances. Dimensional tolerance is the allowable variation in the size of a part during cutting. In the case of the same basic size, the smaller the dimensional tolerance and the higher the dimensional accuracy.

3. Shape accuracy

Die frame refers to the degree of conformity between the actual geometry of the machined part surface and the ideal geometry. There are 6 items to evaluate shape accuracy, such as straightness, flatness, roundness, cylindricity and line profile. Shape accuracy is controlled by shape tolerance, and each shape tolerance is divided into 12 accuracy levels except for 13 accuracy levels of roundness and cylindricity.

Usually, when designing machine parts and specifying the precision of standard die machining, attention should be paid to controlling the shape error within the position tolerance, and the position error should be less than the dimensional tolerance. That is, the shape accuracy requirements of precision parts or important surfaces of parts should be higher than the position accuracy requirements, and the position accuracy requirements should be higher than the dimensional accuracy requirements.

The machining accuracy of standard die is the degree of conformity between the actual position, size and shape of the surface of the machined part and the ideal geometric parameters required by the drawing. The following Xiaobian will take you to understand how to improve the processing accuracy of standard molds:

Machining accuracy and machining error are both terms used to evaluate the 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, and the larger the numerical value, the larger the error. High processing accuracy means small processing error, and vice versa. 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 of the parts and the surface quality of the two parts. The machining accuracy refers to the extent to which the actual geometric parameters of the parts after processing, such as size, shape and position, are consistent with the ideal geometric parameters. The difference between them is called machining error. The size of machining error reflects the machining precision. The larger the error, the lower the machining accuracy, and the smaller the error, the higher the machining accuracy.