What is a profile in GD?
What is a profile in GD?
In GD, profile tolerance defines a uniform boundary around a surface within which the elements of the surface must lie. Profile is a complex tolerance that simultaneously controls a feature’s form, size, orientation, and sometimes location.
What is the symbol of profile of a surface?
The profile of a surface symbol is a half-circle with the curved edge facing up and the flat edge on the bottom. On the feature control frame, the box to the right of the Profile of a Surface symbol contains the tolerance for the surface.
What is difference between profile of line and profile of surface?
In other words, while profile of a line looks only at a specific cross section, profile of a surface looks at how measurements vary from one cross section to the next.
How is profile measured?
Gauging / Measurement: Profile is usually measured using a CMM due to the complexity of some of the surfaces that are called out. The CMM would compare the 3D scan of the profile to the dimensions called out on the drawing to see if it was in spec.
What does Cylindricity mean?
Cylindricity is a 3 dimensional analysis of form: it attempts to combine the characteristics of axial form, radial form and overall shape by the use of best fit cylinders.
What is a profile drawing?
Profile drawing means a scaled graph or plot that represents the side view of an object. Objects may include a surface water body or a portion of it, a man-made channel, an above-ground structure, a below-ground structure, a geographical feature, or the ground surface itself.
Is profile tolerance Plus or minus?
Size of the opening is given by the basic dimensions, but size tolerance is provided by the Profile of a Surface constraint. Form is also controlled by this tolerance, as each point must be within the tolerance zone, which is plus or minus 0.0025” from the basic dimension.
What does flatness symbolize?
Flatness. GD Flatness is a common symbol that references how flat a surface is regardless of any other datum’s or features.
What is angularity in GD?
Angularity is a control used in a tolerance frame, or feature control frame in GD. It can be applied to a feature surface or to an axis and it must be defined relative to a datum – a surface on its own cannot have an angularity with no other reference.
What is a straight profile?
The face when viewed in profile is neither convex (curving outward) nor concave (curving inward); although even a straight profile has a very slight curvature. Poetriflexin. PICTURES OF DIFFERENT PROFILES.
What is a plan and profile drawing?
The plan and profile sheet is a type of engineering drawing, traditionally prepared in CAD, that combines a plan view, a map that targets a linear feature such as a levee, road, or channel, with a profile view, an XY plot of the elevation of the targeted linear feature.
How is GD profile calculated?
Profile is usually measured using a CMM due to the complexity of some of the surfaces that are called out. The CMM would compare the 3D scan of the profile to the dimensions called out on the drawing to see if it was in spec.
What is profile measurement?
Profile measurement systems measure and record the profile of a target by tracing the surface of the target using a stylus. Some instruments can even be used as surface roughness meters.
How do you measure profile tolerance?
When measuring the profile tolerance of a plane, you are checking whether a designed part’s curved surface is made to the specified design. Unlike the profile tolerance of a line, the measurement of the profile tolerance of a plane involves the entire specified curvature.
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