Machining quality of precision parts is expressed by machining precision

Machining quality of precision parts is expressed by machining precision

1、 Interchangeability of parts

According to the precision parts manufacturer, after long-term production and operation, some parts will inevitably wear and deform and be scrapped, replacing with new parts. These parts are called accessories or spare parts. Accessories or spare parts without repair or selection, installed on the machine can run, known as exchange.

In order to achieve interchangeability, when manufacturing parts, we should make the size and geometry of the parts as a whole. The so-called “all in all” does not require that the score is not poor at all (it is neither economical nor possible to do so). As long as the size and geometry of the parts are controlled within a promised boundary, so that the parts and other parts have the same fusion function after fusion. The promised deviation line is the official of form and position.

2、 The machining quality of precision parts is expressed by machining accuracy:

1. Geometric form accuracy

The accuracy of geometric form refers to the accurate level of geometric form such as the surface or axis of the part, such as whether the line is straight, whether the surface is flat, and whether the normal section on the cylinder is round, etc. The allowable change boundary is expressed by “shape and position yamen servant”. The smaller the number of shape and position yamen servant is, the higher the form accuracy is.

2. Dimensional accuracy

According to the analysis of precision parts processing factory, dimensional accuracy refers to the accurate level of the dimension after the parts are processed, which is represented by “dimension yamen runner”. When the dimensions of the parts are the same, the higher the accuracy, the smaller the Yamen number.

3. Position accuracy

According to the precision parts manufacturer, the position accuracy refers to the accurate level of the mutual position between the surfaces of the parts, such as whether the two planes are parallel, vertical, and whether the two axes are coaxial.

The Yamen servants in the above forms and positions are referred to as “yamen servants in shape and position”.