ASME Y14.41 pdf free download

ASME Y14.41 pdf free download Digital Product Definition Data Practices Engineering Drawing and Related Documentation Practices
This Section establishes the requirements for a data set. The data set shall provide complete product defini- tion; for example, a design model, its annotation, and supporting documentation.
5.1 GENERAL MODEL REQUIREMENTS The following paragraphs describe general require- ments for a model.
5.1.1 Design Model Requirement A design model is required and shall be in accordance with Section 6.
5.1.2 Associativity Associativity shall be available, maintainable, and electronically accessible.
5.1.3 Coordinate Systems Amodelshallcontainone ormorecoordinatesystems. A coordinate system shall be depicted by three mutually perpendicular line segments with its origin located at the intersection of the three axes. Each axis shall be labeled with an uppercase letter indicating the positive direction. Coordinate systems shall be right-handed unless otherwise specified. See Fig. 5-1.
5.1.4 Applications of Supplemental Geometry When supplemental geometry is used, there shall be a clear distinction between the supplemental geometry and the design model geometry.
(a) Represented Line Element. The following geometric tolerances may use a represented line element to clarify the directionality of a two-dimensional tolerance zone of parallel lines. When a represented line element is used to indicate the direction of a geometric tolerance application, the leader from the feature control frame shall terminate on the represented line element in an arrowhead. See Fig. 12-4.
(1) Straightness applied to the line elements of a planar surface. See Table 12-1 and Fig. 12-4.
(2) Orientation tolerance applied on an Each Element basis. See para. 12.2.2(a) and Fig. 12-9.
(3) Line profile. See para. 12.2.3
(e) and Fig. 12-18.
(b) Associativity. The represented line element, the feature control frame, and the controlled feature should be organized as an associated group. See Figs. 12-4, 12-9, and 12-18. 8 (c) Centerlines and Centerplanes. Display of centerlines or centerplanes for features of size are optional. (d) Direction of Movement for Movable Datum Targets. Represented line elements are used to indicate the direc- tion of movement for movable datum targets. See para. 11.2.3(b) and Fig. 11-4, illustration (b) or para. 11.3(d) and Fig. 11-11, illustration (b).
(e) Datum Target Areas or Locations. The areas for datum targets may be indicated using supplemental geometry. The “X” for point targets may also be indi- cated using supplemental geometry. See Fig. 11-4, illustration (b).
5.1.5 Part Features Not Fully Modeled A simplified representation of part features such as threads, holes, fillets, rounds, and drafts may be shown using partial geometry definition, annotations, attri- butes, or a combination thereof. See Fig. 7-4.
5.1.6 Assembly Model Completeness Assembly model completeness shall be in accordance with para. 6.1.2, except part and subassembly models shown in the assembly model need only show sufficient detail to ensure correct identification, orientation, and placement. The assembly model may be shown in an exploded, partially assembled, or completely assembled state. The placement of parts and subassemblies within the assembly may alternatively be defined via annota- tion, or a combination of annotation and pictorial repre- sentation of the model.
5.1.7 Installation Model Completeness Installation completeness shall be in accordance with paras. 6.1.2 and 5.1.6 except part and assembly models shown in the installation model need only show sufficient detail to provide installation and space require- ments. The maximum envelope for parts and assemblies may be shown using supplemental geometry, annotation, or a combination of both. Location and orientation of parts and assemblies may be shown by geometric definition, annotation, or a combination of both.
5.2 GENERAL METHOD REQUIREMENTS Thefollowingparagraphs covertheproductdefinition methods listed below. Each different method for speci- fying product definition is used in support of different industry processes and requirements. The data set is the original for all of the methods,and any hard copy outputis a derivative.
5.2.1 Model Only
The following paragraphs describe requirementswhen complete product definition is contained in themodel.
(a) Product definition data, including but not limitedto notes, associated lists, marking requirements, dimen-sions,and tolerances shall be contained or referencedin the data set.
(b)The following data elements of a drawing graphicsheet format as defined in ASME Y14.1 or ASME Y14.1Mare required and shall be contained in the data set:
(1)Design Activity Identification
(2) data set title
(3) data set identifier
(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 identifier is used(c) When working with a model,the first or thirdangle projection symbol in accordance with ASME Y14.3is not required.
5.2.2 Model and Drawing Graphic Sheet
The following paragraphs describe requirementswhen complete product definition is contained in themodel and drawing graphic sheet.
a) A complete definition of a product shall containa model and a drawing graphic sheet that may containorthographic views, axonometric views, or a combina-tion thereof. Annotation may be applied to the model,on the drawing graphic sheet, or a combination of both.