Contains the mechanical processing precision which on the one hand!
machining precision, is refers to the steel after the precision machining of main geometry parameters and parts drawings actually required by the ideal value consistent level. While not consistent level among them, called processing deviation.
drill bush can improve machining precision. Drill sets, small once, big changes.
includes three aspects: production and processing precision
1. Specifications precision, limited production and processing surface standard deviation does not exceed standard specifications must be between categories.
2。 Geometry precision, limited production and processing the surface of the macroeconomic geometry appearance deviation, such as roundness, cylindricity, straightness and parallelism.
3。 Each location precision, limited production and processing each other parts of the surface between the standard deviation, such as coaxial degree, flatness and parallel degree, etc.
after the production and processing is a production and processing precision of parts surface specifications, appearance, actually part of the specified several main parameters of geometry and engineering drawing of main parameters of idealized geometry level. Idealized geometries of the main parameters, to the specifications is average specifications; For surface geometry appearance, that is, the circle, cylinder, floor plan, spherical and parallel lines, etc. ; For each other parts of the surface layer in the middle, that is, the parallel surface, vertical, coaxial output, symmetry, etc.
parts actually geometry main parameters of main parameters and idealized geometry offset values is called a production and processing deviation. Production and processing precision and the production processing deviation all comments on main parameters, production, processing and surface geometry of the professional term. Production and processing precision with tolerance level, level value is smaller, its precision is higher; Production and processing deviation expressed in values, the values, the greater the its deviation.
production and processing precision, that is to say the production processing deviation is small, and vice versa. All production and processing way of main parameters are actually is not easy to accurately, look from the role of the parts, if the production processing deviation in the range of size tolerance specified parts drawing, feel to ensure the production and processing precision. Equipment quality lies in the spare parts production and processing quality and equipment assembly line quality, including milling machine processing precision milling machine processing quality and process performance most.
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