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machining precision and machining error are evaluating surface geometric parameters of the term. The machining accuracy as measured by the tolerance grade level value is smaller, its precision is higher; Expressed in numerical processing error, the greater the value, the error is bigger. Machining precision is high, is the processing error is small, and vice versa.
on the surface of the parts after machining precision is actual size, shape, location, three kinds of geometric parameters and geometric parameters of conform to the drawing requirements. The ideal geometric parameters, for size, it is average size; For surface geometry is absolute round, cylindrical, flat, cone and straight line, etc. ; For surface location between, is absolutely parallel, perpendicular, coaxial, symmetry, etc.
machine depends on the quality of the machining quality of parts and assembly quality of the machine, spare parts processing quality includes parts processing precision and surface quality of two parts machining accuracy refers to the actual geometric parameters (parts processing after Size, shape and position) Consistent with ideal geometric parameters. The difference between them is called machining error.
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