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Unformatted text preview: rial requirement: surface-gauge whose size is fixed The maximum material requirement defines a theoretical surfaces (border surfaces) 6 E. Pairel, P. Hernandez and M. Giordano that the toleranced faces of the part do not have to cross. These theoretical surfaces are cylindrical surface-gauges of diameter equal to 7.9 mm. They are in theoretical positions between each another and with regard to the surface-gauge plane used as datum : Figure 4; Interpretation of the maximum material requirement applied to a pattern of holes. When the plane is fitted to the bottom face of the part, the virtual gauge, composed of the plane and the two cylinders, has three degrees of freedom corresponding to the established planar joint, which enables it to assemble the two cylinder-gauges inside the holes. 2.4 Datum system and pattern of features taken as a datum (tolerance No. 4) The virtual gauge is composed of four gauges: a plane surface-gauge, two cylindrical surface-gauges and one cylindrical zone-gauge. These gauges are linked together. The plane is fitted first on th...
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This note was uploaded on 08/03/2010 for the course DD 1234 taught by Professor Zczxc during the Spring '10 term at Magnolia Bible.
- Spring '10
- The Land