ASME Y14.41:2003 pdf free download

ASME Y14.41:2003 pdf free download.DIGITAL PRODUGT DEFINITION DATA PRAGTICES.
4.1.1 Geometric Scale, Units, and Precision. The following an’ the requirements concerning the Scale, Units, and Precision of a design model.
(a) Scale. Design models shall be modeled at a scale of 1:1.
(b) The units of measure (metric or U.S. customary) at which the design model is created shall be specified within the data set.
(c) Precision. 11w design model precision indicates the numeric accuracy required in the production of the part in order for it to fulfill the design intent. The number of significant digits of the design model shall be specified in the data set. The number of decimal places required for the design cannot exceed the precision of the design model.
4.1.2 Model Completeness. The model shall contain geometr attributes, and annotation as required to provide a complete definition of the part.
(a) Models not fully modeled shall be identified as such (e.g., partially modeled symmetrical part).
(b) Features that are not fully modeled shall be identified as such (e.g., threaded holes that are only shown as holes).
4.1.3 Assembly Model Completeness. Assembly model completeness shall be in accordance with para. 4.1.2, except part and sub-assembly models shown in the assembly model need only have sufficient detail shown 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 sub-assemblies within the assembly may alternatively be defined via annotati()n, or a combination of annotation and pictorial representation of the model.
4.1.4 Installation Model Completeness. Installation completeness shall be in accordance with paras. 4.1.2 and 4.1.3, except part and assembly models shown in the installation model need only be sufficiently detailed to provide installation and space requirements. The maximum envelope for parts and assemblies may be shown using supplemental geometr, 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 COMMON REQUIREMENTS FOR PRODUCT DEFINITION DATA
This Section establishes the common requirements for the application, display management, and query of product definition data, Specific requirements for particular types of product definition data are described in Sections 6 through 10.
5.1.1 Display Management. Display management shall include the ability to enable or disable the display of all annotation, annotation by type, or selected annotation. Sec Fig. 5-1.
5.1.2 Hard Copy. A hard copy ol any given visual display shall be available on demand. When a hard copy is intended to be used as an engineering drawing, it shall meet applicable drawing standards.
5.2 Model Requirements
The following paragraphs describe requirements for annotation applied to a design model. These are general requirements that apply to all types of annotation. Specific requirements for particular types of annotation are addressed in Sections 6 through 10. See Fig. 5-2 for a diagram showing the relationship between annotation and model geometry.