Geometry tolerancing - pioneer.netserv.chula.ac.th

1 5 Geometry tolerancing (types of geometrytolerances) AS 1100 Part101 FeatureFeature feature , , ( )

2 Feature features of : 3940 5. Geometry tolerancing : sizeMaximum and Least material conditions, MMC and LMC features of size (mating parts) (Maximum Mate-rial Condition, MMC)

3 ( b) (Least Material Condition, LMC) mm MMC (tolerance) LMC Virtual sizeVirtual size (perfect form) virtual size( ) (c)

4 Virtual size virtual size DatumDatum , , Datum (TYPES OF Geometry TOLERANCES)41 : : virtual size 42 5.

5 Geometry tolerancing : MMC : MMCD atum featureDatum feature feature , , datum datumMaximum material principleMaximum material principle 1. MMC ( )2.

6 MMC MMC 4. MMC (b) (c)5. feature ( ) (=( + + )/2) (TYPES OF Geometry TOLERANCES)43 : MMC.

7 MMC 44 5. Geometry tolerancing : MMC (frame method) 3 (1)

8 Datum feature datum feature datum feature datum feature (2) datum feature (2), (7), (10) slot (18)flatness (3) (straightness) 1.

9 2. 3. (solids of revolution) 45 : 46 5. Geometry tolerancing : 47 : 48 5. Geometry tolerancing : 49 : 50 5.

10 Geometry tolerancing : 51 : 52 5. Geometry tolerancing : (4) (5) (6) (perpendicularity) 1.