3D點偏差的自定義公差
From version 3.6 has been implemented non standard profile tolerance for GSURF, CURVE and POINT features.
The difference from the ANSI is that, using the 3D profile, the deviation is calculate along the 3D vector that joint the measure point and the nominal, while, in the standard , the deviation is along the normal direction of the nominal point.
Although not in the ANSI standard this tolerance is quite common in the automotive industry.
The different methods can be called from the PROFILE of POINT/SURFACE/CURVE tolerance panel.
The DMIS code created in the two cases is as follow:
F(POINT_PROFILE_ANSI)=FEAT/POINT,CART,0.0000,0.0000,0.0000,0.00000000,0.00000000,1.00000000
F(POINT_PROFILE_3D)=FEAT/POINT,CART,0.0000,0.0000,0.0000,0.00000000,0.00000000,1.00000000
FA(POINT_PROFILE_ANSI)=FEAT/POINT,CART,0.10000,0.20000,0.30000,0.00000000,0.00000000,1.00000000
FA(POINT_PROFILE_3D)=FEAT/POINT,CART,0.10000,0.20000,0.3000,0.00000000,0.00000000,1.00000000
V(TEXT)=VFORM/ALL
DISPLY/TERM,V(TEXT)
TEXT/OUTFIL,'This is the Standard ANSI profile Tolerance'
T(ANSI_PROFILE)=TOL/PROFS,-0.1000,0.1000
OUTPUT/FA(POINT_PROFILE_ANSI),TA(ANSI_PROFILE)
TEXT/OUTFIL,'This is the NON Standard 3D Profile Tolerance'
T(3D_PROFILE)=TOL/USETOL,'PROFS_3D',-0.1000,0.1000
OUTPUT/FA(POINT_PROFILE_ANSI),TA(3D_PROFILE)
DISPLY/OFF
Selection of the different methods of profile tolerance
Difference between ANSI and 3d profile
Features whom the tolerance is applied
