What is the difference between line profile and surface profile?
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.
What is surface profile in GD?
The profile of a surface specification defines a 3-dimensional tolerance zone equidistant from the theoretically exact shape or curve (i.e. the “True Profile”) to control all the points along the surface to be within a tolerance range.
What does surface profile mean?
Description: Profile of a surface describes a 3-Dimensional tolerance zone around a surface, usually which is an advanced curve or shape. Profile controls all the points along the surface within a tolerance range that directly mimics the designed profile.
Does surface profile need a datum?
Profile can control, form, location, orientation, and size or any subset of these. Profile can be used with or without datum references and with or without basic dimensions.
What does line profile mean?
Description: Profile of a line describes a tolerance zone around any line in any feature, usually of a curved shape. Profile of a line is a 2-Dimensional tolerance range that can be applied to any linear tolerance.
What is a profile GDT?
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. The top figure shows the profile tolerance applied to a curved surface.
When should you use a profile on a surface?
Profile of a surface can be used for advanced curved surfaces, such as when a surface curves in multiple axes at once. Commonly, casted parts call out surface profile when the surface is curved to control the amount of variation.
What is Profile GDT?
What is meant by profile of line?
[¦prō‚fīl ‚līn] (geology) The top line of a profile section, representing the intersection of a vertical plane with the surface of the ground.
What is profile line?
Does profile tolerance need datum?
Datums are normally used, but are not required, if datums are not referenced, the tolerance only limits the form of the profile; if three datums are referenced, the tolerance limits the form, location, and orientation. Tolerance zone is bilateral unless otherwise specified.
What’s the difference between surface profile and GD & T?
The GD profile of a surface is a three-dimensional version of the profile of a line — so, like total runout, surface profile does not pertain to just a cross section. Instead, it controls the entire feature surface (again, usually having a curved shape) with the goal of making sure every point falls in the tolerance zone.
When to use profile of line or profile of surface?
Usually, we see Profile of Line utilized to control the variability of a surface section at a specific surface location. We normally specify a Profile of Surface tolerance when one wants to control the variability of an entire 3D profile surface.
What is the GD & T profile of a line definition?
GD Profile of a Line Definition. In GD, profile of a line tolerance is similar in many respects to profile tolerance. The major difference is that profile of a line establishes a two-dimensional tolerance zone that controls individual line elements of a feature or surface.
How is profile of a line similar to profile tolerance?
In GD, profile of a line tolerance is similar in many respects to profile tolerance . The major difference is that profile of a line establishes a two-dimensional tolerance zone that controls individual line elements of a feature or surface.