What is a feature control frame? A key component of geometric dimensioning and tolerancing (commonly referred to as GD&T). On engineering blueprints, the feature control frame consists of a symbol to identify the type of tolerance, the amount of tolerance and reference datums if applicable.19 ene 2020
What does S mean in a feature control frame?
Tolerance Zone Size Modifiers. Tolerance Zone Mobility Modifiers. (S) encodes the “aiming” or “centering” function of a feature and causes the tolerance. to be (S)tuck at the specified value.
What is feature tolerance?
In NX, a tolerance feature is one or more geometric features combined with their geometric tolerancing information. Tolerance features are represented in the graphics area by Geometric Dimensioning and Tolerancing symbols.
What is a feature control frame used for?
In GD&T, a feature control frame is required to describe the conditions and tolerances of a geometric control on a part's feature. The feature control frame consists of four pieces of information: GD&T symbol or control symbol.9 dic 2014
What is a feature in GD&T?
In GD&T the term feature-of-size (FOS) refers to any surface, or set of parallel surfaces associated with a size dimension. Specific examples of features of size include: A hole diameter (a cylindrical surface) Plate thickness (two opposed parallel surfaces)
What should be contained in the second compartment of a feature control frame?
The second compartment. What are modifiers? Modifiers are symbols within the feature control frame that can increase the amount of the stated geometric tolerance or extend the length of the tolerance zone. They are contained in the tolerance or datum compartments (2nd or 3rd frame).
What is GD&T in manufacturing?
GD&T is an acronym that stands for Geometric Dimensioning and Tolerancing. It is a symbolic language used by designers to communicate manufacturing constraints and tolerances clearly. This information is conveyed in the form of annotations included in the design of the part.
How many datums Can a drawing have?
4 Datums Referenced in a Print (Drawing) Feature Control Frame.5 mar 2014
How do you read a tolerance drawing?
https://www.youtube.com/watch?v=Bo8WhtqkFWY
What does the number mean in a feature control frame?
The numerical value defines the tolerance zone. The unit of measure is the same for the whole drawing and will be defined in the title block. Modifier for the Tolerance. This is max material condition or a projected tolerance in the feature control frame.21 mar 2019
What is feature control frame?
Definition: In GD&T, a feature control frame is required to describe the conditions and tolerances of a geometric control on a part's feature. The feature control frame consists of four pieces of information: GD&T symbol or control symbol. Tolerance zone type and dimensions.9 dic 2014
What must a feature control frame be connected to?
By connecting the feature control frame to the surface with a leader or by connecting the feature control frame to an extension line in the view where the surface to be controlled is shown as an edge.
Can you put a datum on a centerline?
To sum up, a datum can indeed be a centerline, but it is never to be labeled as such on a drawing. This is actually not 100% true. ... A datum feature label may not be applied to an axis, center plane, or center point on a drawing because none of those things are datum features.