BS ISO 13715:2017 pdf download – Technical product documentation — Edges of undefined shape — Indication and dimensioning
This document specifies rules for the indication and dimensioning of undefined edges in technicalproduct and dimensions.The proportions and dimensions of the graphical symbols to be used are alsospecified.
In cases where the geometrically defined shape of an edge (for example,1 × 45′) is required, the generaldimensioning principles given in ISO 129-1 apply.
There are no normative references cited in this document.
3Terms and definitions
For the purposes of this document, the following terms and definitions apply.
lSO and IEC maintain terminological databases for use in standardization at the following addresses:—IEC Electropedia: available at http://www.electropedia.org/
-ISO online browsing platform: available at http://www.iso.org/obp
edge of undefined shape
transition line, included in an intersection plane, which is not defined on the nominal model and whichexists between two adjacent integral surfaces
deviation inside the ideal geometrical shape of an edge defined by two tangent outside straight lines tothe adjacent feature of the zone of the undefined edge
Note 1 to entry: The explanation of the definition is given in Figures 1 and 3. In order to simplify th illustration,only the undercut and the two tangents outside straight lines are represented.
Note 2 to entry: Examples are presented in Eigures 2 and 4.
deviation outside the ideal geometrical shape of an edge defined by two tangent outside straight linesto the adjacent feature of the zone of the undefined edge
Note 1 to entry: The explanation of the definition is given in Figures 5 and 7. In order to simplify the illustration,only the passing and the two tangents outside straight lines are represented.
Note 2 to entry: A burr or a flash (see Figure 5) can be considered to be a special case of external passing.Note 3 to entry: Examples are presented in Figures 6 and 8.
4 Indications on drawings
4.1 Basic indication
The requirements for an edge of a part shall be indicated by the basic graphical indication shown in Figure 9. If all edges of a part are to be specified as undefined, the basic general indication is used (see Figure 10).
The graphical symbol and the specification shall be represented in such a way that they can be read from the bottom of the drawing.
The proportions of this symbol are given in Annex A. Additional indications can be placed in the areas a 1 , a 2 or a 3 , see Figure A.1.
Undefined edges cannot be described by the basic element alone. As a minimum indication, the type of undefined edge shall be specified.BS ISO 13715 pdf download.