ASME Y14-41:2003 pdf download DIGITALPRODUCT DEFINITION DATA PRACTICES
3.1.2 Design Model Requirement. A design model isrequired and shall be in accordance with para. 3.2 andSection 4.
3.2 General Model Requirements
The following paragraphs describe general requirements for a model.
32.1 Associativity. The ability to associate digital elements shall be available and maintained. Associativityinformation shall be electronically accessible.
3.2.2 Model Coordinate Systems. A design modelshall contain one or more model coordinate systemsA model coordinate system shall be depicted by threemutually perpendicular lines segments with its originlocated at the intersection of the three axes.
Each axis shall be labeled and the positive directionshown. Model coordinate systems shall be right-handedunless otherwise specified. See Fig. 3-1.
3.2.3 Applications of Supplemental Geometry. Whensupplemental geometry is used, there shall be a cleardistinction between the supplemental geometry and thedesign model geometry.
(a) Represenfed Line Elemient. The following geometrictolerances may use a represented line element to clarifythe directionality of a two-dimensional tolerance zoneof parallel lines. When a represented line element isused to indicate the direction of a geometric toleranceapplication, the leader from the feature control frameshall terminate on the represented line element in anarrowhead.See Fig.10-4.
(1) Straightness applied to the line elements of aplanar surface. See Table 10-1 and Fig.10-4.
(2) Orientation tolerance applied on an Each Element basis. See para.10.2.2(a) and Fig.10-9.
(3) Line profile. See para. 10.2.3(g) and Fig. 10-20!(b) Associativity. The represented line element, the feature control frame, and the controlled feature should beorganized as an associated group. See Figs. 10-4, 10-9and 10-20.
3.2.4 Part Features Not Fully Modeled. A simplifiedrepresentation of part features such as threads, holesfillets, rounds, and drafts may be shown using partialgeometry definition, annotations, attributes or a combination thereof. See Fig. 5-4
3.3 General Method Requirements
Dafa Set Methods. The following paragraphs cover theproduct definition methods listed below. Each differentmethod for specifying product definition is used in sup-port of different industry processes and requirementsThe data set is the original for all of the methods, andany hard copy output is a derivative.
3.3.1 Model Only. The following paragraphs describerequirements when complete product definition is contained in the model.
(a) Product definition data, including but not limitedto notes, parts lists, marking requirements, dimensionsand tolerances shall be contained or referenced in thedata set.
(b) The data elements of a drawing format as definedin ASME Y14.1 or ASME Y14.1M are not required,exceptfor the following, which shall be contained in thedata set:
(1) name and address of the company or designactivity corresponding to the Commercial and Govern-ment Entity (CAGE) code for the data set
(2) data set title
(3) data set number
(4) approval indicators and approval dates
(5) contract number when required
(6) originator’s name and date
(7) CAGE Code when required for identification ofthe design activity whose data set number is used
(c) When working with a model, the first or thirdangle projection symbol in accordance with ASMEY14.3M is not required.
3.3.2 Model and Drawing. The following paragraphsdescribe requirements when complete product definition is contained in the model and drawing.(@) A complete definition of a product shall containa model and a drawing that may contain orthographicviews axonometric views, or a combination thereofAnnotation may be applied to the model, or on thedrawing, or a combination thereof.