Unformatted text preview: tablish the variations for sizes and positions of the two holes in the plate. According to the Standards [ASME, 1994 and ISO, 1983], the feature control frame XXXXXXXXX specifies a tolerance-zone (Fig. 1(b)) for each of the two holes. Each tolerance-zone is a very thin right-circular cylinder of length j and defined by circles C and C of diameter t, which are located in the upper and lower faces of the plate. The tolerance zone is exactly perpendicular to Datum A (Fig. 1(a)) and exactly located with dimensions a and b (or c) from Datums C and B, respectively.
5.1 4.9 0.1 A B C 0.08
Z $6 11.1 10.9 0.1 A B C 0.05 A $8 $9 $7 $2 C
S $1 S $3 B $5 $4 A B
j a b
j j (a) O y c C x
sE D A Oc (b) C Figure 1. a) Two holes in a plate of thickness j. Both holes are located with the tolerance t = 0.1 mm. The larger hole is to be held perpendicular to Datum A with the tolerance t” = 0.5 mm. b) A cylindrical tolerance-zone for the axis of a hole determined by circles C and C, each with its diameter equal to the positional tolerance t. Basis-lines $1…$5 are shown,...
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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