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Part finishing shape accuracy, position accuracy, and dimensional accuracy

The precision of finishing machining mainly refers to the degree of conformity of the actual shape, position, and dimensions of the surface of the machined part with the ideal geometrical parameters required by the drawing. In general, the ideal geometrical parameters are, to a certain degree, the dimensions. The average size is the absolute circle, cylinder, plane, cone, and line for the surface geometry. For the mutual position of the surface, it is absolute parallel, vertical, coaxial, and symmetric.

Precision of part finishing

Part finishing refers mainly to the degree of coincidence between the actual dimension of the machined part and the tolerance zone center of the part size.

Part finishing shape accuracy

It mainly refers to the degree of conformity between the actual geometry of the machined part surface and the ideal geometry.

Part precision machining position accuracy

Refers to the difference in the actual positional accuracy between the relevant surfaces of the parts after machining.

The relationship between parts finishing

In the process of machining, usually when designing machine parts and the specified part machining accuracy, it should be effective to pay attention to the shape error control within the position tolerance, and the position error should be smaller than the size tolerance. That is, the critical surface of precision parts or parts, the shape accuracy requirements should be higher than the position accuracy requirements, the position accuracy requirements should be higher than the dimensional accuracy requirements.

The actual parameters obtained by any machining method of part finishing will not be absolutely accurate. In general, from the point of view of the function of the part, as long as the machining error is within the tolerance range required by the part drawing, it is considered that the machining accuracy is guaranteed. The quality of the machine depends on the processing quality of the part and the assembly quality of the machine. The processing quality of the part includes the two parts of the machining precision and the surface quality of the part.http://www.pump-casting.com/