ASME Y14.41:2012 pdf download

ASME Y14.41:2012 pdf download.Digital Product Definition Data Practices
1.1 SCOPE
This Standard establishes requirements and references documents applicable to the preparation and revision of digital product definition data, hereafter referred to as data sets. This Standard defines exceptions and addi- tional requirements to existing ASME standards for using product definition digital data sets or drawing graphic sheet in digital format, hereafter referred to as drawing graphic sheet. When no exception or additional requirements are stated, existing ASME standards shall apply. It is essential that this Standard be used in close con- junction with ASME Y14.24, ASME Y14.34, ASME Y14.35M, and ASME Y14.100. In addition, classi- fication codes as defined in ASME Y14.100 may apply for data sets that include a combination of a model and drawing graphics sheet.
1.2 STRUCTURE OF STANDARD
This Standard supports two methods of preparing a data set: model only, and model and drawing graphic sheet. The structure starts with the requirements com- mon to both methods, and then branches to the other sections that have differing requirements for each method. In addition, it provides a guide for the many computer aided design (CAD) software packages to develop better modeling and annotation practices for CAD and engineering disciplines.
1.3 ASME Y14 SERIES CONVENTIONS
The conventions in paras. 1.3.1 through 1.3.10 are guidance used in this and other ASME Y14 Series of standards.1.3.2 Cross-ReferenceofStandards. Cross-reference of standards in text with or without a date following the standard identity is interpreted as follows: (a) reference to other ASME Y14 Series of standards inthe textwithouta date followingthe Standard identity indicates the issue of the standard as identified in the References section (section 2) shall be used to meet the requirement (b) reference to other ASME Y14 Series of standards in the text with a date following the standard identity indicates that only that issue of the standard shall be used to meet the requirement 1.3.3 Invocation of Referenced Standards. The following examples define the invocation of a standard when specified in the References section (section 2) and referenced in the text of this Standard: (a) When the text states “dimensioning and toleranc- ing shall be in accordance with ASME Y14.5-2009,” with no limitations to a specific subject or area of the Standard, the entire text of ASME Y14.5-2009 is invoked. (b) When the text states “assign part or identifying numbers in accordance with ASME Y14.100-2004,” only the paragraph requirements on Part or Identifying Number assignment in ASME Y14.100-2004 are invoked. (c) When the text states “for gaging principles see ASME Y14.43,” the text provides a cross-reference of where to find guidance for dimensioning and toleranc- ing for gages and fixtures, and no portion of ASME Y14.43 is invoked. 1.3.4 Parentheses Following a Definition. When a definition is followed by a standard referenced in paren- theses, the standard referenced in parentheses is the controlling standard for the definition.1.3.6 Acronyms and Abbreviations. Acronyms and abbreviations are spelled out the first time used in this Standard followed by the acronym or abbreviation in parentheses. The acronym is used thereafter throughout the text. 1.3.7 Units. The International System of Units (SI) is featured in this Standard. It should be understood that U.S. Customary units could equally have been used without prejudice to the principles established. 1.3.8 Figures. The figures in this Standard are intended only as illustrations to aid the user in under- standing the practices described in the text. In some cases figures show a level of detail as needed for empha- sis. In other cases, figures are incomplete by intent so as to illustrate a concept or facet thereof. The absence of figure(s) has no bearing on the applicability of the stated requirements or practice. To comply with the requirements ofthis Standard, actual data sets shall meet the content requirements set forth in the text. To assist the user of this Standard, a listing of the paragraph(s) that refer to an illustration appears in the lower right-hand corner of each figure. This listing may not be all inclusive. The absence of a listing is not a reason to assume inapplicability. Most figures are illustrations of models in a three-dimensional environment. Figures illustrating drawings in digital format have a border included. When the letter “h” is used in figures for letter heights or for symbol proportions, select the applicable letter height in accordance with ASME Y14.2.