ASME Y14.41:2012 pdf free download

ASME Y14.41:2012 pdf free download.Digital Product Definition Data Practices.
This Section establishes the requirements for a data set. The data set shall provide complete product definition; for example, a design model, its annotation, and supporting documentation.
5.1 GENERAL MODEL REQUIREMENTS
The following paragraphs describe general requirements 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 Associativlty
Associativity shall be available, maintainable, and electronically accessible.
5.1.3 CoordInate Systems
A model shall contain one or more coordinate systems. 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. 124.
(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.
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, attributes, or a combination thereof. Sec 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 annotation, or a combination of annotation and pictorial representation 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 requirements. 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.