GMNA-DESIGN-VOL-2-C3-2002.pdf
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1、 ENGINEERING STANDARDS Design Standard Electronic C3 ELECTRONIC MATH MODEL AND DRAWING DATA CREATION STANDARD DRAWING DATA ORGANIZATION - DRAWING VIEWS AND SECTIONS Copyright 2002 General Motors Corporation All Rights Reserved April 2002 Originating Department: North American Engineering Standards,
2、Records and Documentation Page 1 of 7 DRAWING VIEWS AND SECTONS Note: In the event of a conflict between the English and domestic language, the English language shall take precedence. 1 Scope. This standard establishes the principles for defining workpieces on technical drawings using orthographic p
3、rojection methods. The “arrow method”, which eliminates the need for first angle and third angle projection, is described in this standard and will be used on all GM product drawings. 2 Definitions. The following terms are defined as their use applies in this standard. 2.1 Arrow Method. The means of
4、 indicating the viewing direction for a view or section with an arrow(s). See Fig. 1. 2.2 Directed View. A view that is shown in the direction indicated by an arrow. A directed view can originate from a principle view or any parent view. See Fig. 2. 2.3 Parent View. Any view from which a directed vi
5、ew, special view or section view originates. 2.4 Principle View. The single unlabeled view that represents the starting point for all other views. 2.5 Section View. A view that cuts through a part to define its internal features. A section view can originate from a principle view or any parent view.
6、 2.6 Special View. A directed view that is rotated from its normal orientation, usually so that it is parallel with either the horizontal or vertical edge of the drawing format. See Fig. 2. 3 References. The following documents contain provisions, which, through references in the text, constitute pr
7、ovisions of this standard. For dated references, subsequent amendments to, or revisions of, any of these documents do not apply. For undated references, the latest edition of the document referred to applies. International Draft Standard ISO/DIS 128-30.2 General principles of presentation Basic conv
8、entions for views. 3.1 ASME Y14.2M Line Conventions and Lettering. 3.2 ASME Y14.3M Multiview and Sectional View Drawings. 3.3 GM Engineering Standards Volume I, Section A-61 Copyright General Motors North America Provided by IHS under license with GM Licensee=IHS Employees/1111111001, User=Japan, IH
9、S Not for Resale, 06/24/2008 00:21:51 MDTNo reproduction or networking permitted without license from IHS -,-,- GM ENGINEERING STANDARDS C3 Copyright 2002 General Motors Corporation All Rights Reserved April 2002 Page 2 of 7 4 Arrow Method. The arrow method shall be applied according to the followin
10、g: 4.1 Description. One view of a workpiece shall be selected as the principle view. Each view, with the exception of the principle view, shall be given an identification letter. Directed views, special views, and sections may be placed at any location on the drawing. When using orthographic views,
11、the arrow method may be used to simulate first or third angle projection methods. See Fig. 1 for three orthographic view arrangements. Copyright General Motors North America Provided by IHS under license with GM Licensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 06/24/2008 00:21:51 M
12、DTNo reproduction or networking permitted without license from IHS -,-,- GM ENGINEERING STANDARDS C3 Copyright 2002 General Motors Corporation All Rights Reserved April 2002 Page 3 of 7 Figure 1 ARROW METHOD Copyright General Motors North America Provided by IHS under license with GM Licensee=IHS Em
13、ployees/1111111001, User=Japan, IHS Not for Resale, 06/24/2008 00:21:51 MDTNo reproduction or networking permitted without license from IHS -,-,- GM ENGINEERING STANDARDS C3 Copyright 2002 General Motors Corporation All Rights Reserved April 2002 Page 4 of 7 4.2 Title Block Reference. The following
14、note shall be used in the drawing general notes: VIEWS AND SECTIONS ON THIS DRAWING ARE IN ACCORDANCE WITH GM DCS SECTION C1. The drawing title block shall not display the first angle or third angle projection symbol. 4.3 Symbology. The following symbology applies to the arrow method of projection.
15、4.3.1 Arrows. Arrows shall be constructed in accordance with Fig. A-1. 4.3.2 Cutting Planes. The cutting plane is identified with a cutting plane line that is shown as a thick alternating long and short dashed line. See Fig. A-1. 4.3.3 Identification. A single upper case letter should be placed at o
16、r adjacent to the tail of the arrow indicating the viewing direction of the directed view, section view, or special view. 4.4 Labeling of Views and Sections. The following shall apply to construction of views and sections: 4.4.1 Views. The following shall apply to views on orthographic drawings: a.
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