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ASME Y14.8-2009 pdf download

ASME Y14.8-2009 pdf download.Castings, Forgings, and Molded Parts.
1.1 SCOPE This Standard covers def nitions of terms and features unique to casting, forging, and molded part technologies with recommendations for their uniform specif cation on engineering drawings and related documents. Un- less otherwise specif ed, any reference to features, parts, or processes shall be interpreted as applying to castings, forgings, and molded parts. Castings, forgings, and molded parts are delineated as “parts” throughout the Standard. 1.2 UNITS The International System of Units (SI) is used in this Standard because SI units are expected to supersede United States (U.S.) Customary units. Customary units could equally well be used without effect to the princi- ples established. 1.3 REFERENCE TO THIS STANDARD Where drawings are based on this Standard, this fact shall be noted on the drawings or in a document refer- enced on the drawings. References to this Standard shall state “PREPARED IN ACCORDANCE WITH ASME Y14.8-2009.” 1.4 FIGURES The f gures in this Standard are intended as illustra- tions to aid the user in understanding the principles and methods of drawing described in the text. The absence of a f gure illustrating the desired application is neither rea- son to assume inapplicability nor basis for drawing re- jection. In some instances, f gures show added detail for emphasis; in other instances, f gures are incomplete by intent. Numerical values of dimensions and tolerances are illustrative only.
1.4.1 Drawings in Digital Format The f gures in this Standard are illustrated in 2D drawing presentation. The principles shown in these f gures may be presented in digital (3D) format per ASME Y14.41. 1.5 NOTES Notes herein in capital letters are intended to appear on drawings. Notes in lower case are explanatory only and are not intended to appear on drawings. 1.6 DIMENSIONING AND TOLERANCING The methods of dimensioning and tolerancing shall be in accordance with ASME Y14.5M and this Standard. 1.7 REFERENCES The following revisions of American National Standards form a part of this Standard to the extent specif ed herein. A more recent revision may be used provided there is no con- f ict with the text of this Standard. In the event of a conf ict between the text of this Standard and the references cited herein, the text of this Standard shall take precedence. ASME Y14.5M-1994, Dimensioning and Tolerancing ASME Y14.24-1999, Types and Applications of Engineer- ing Drawings ASME Y14.36M-1996, Surface Texture Symbols ASME Y14.41-2003, Digital Product Def nition Data Practices ASME Y14.100-2004, Engineering Drawing Practices Publisher: The American Society of Mechanical Engineers (ASME), Three Park Avenue, New York, NY 10016-5990; Order Dept: 22 Law Drive, P.O. Box 2300, Fairf eld, NJ 07007-2300 (www.asme.org)
1.8 DEFINITIONS The following terms are def ned as their use applies in this Standard. Other commonly used casting/forging/molded part terms are def ned in Nonmandatory Appendix A. 1.8.1 Casting casting: a part obtained by solidif cation of material in a die or mold. 1.8.2 Corner Radius (Edge Radius) corner radius (edge radius): the convex radius on the sur- face of a part connecting two surfaces (see Fig. 1-1). 1.8.3 Die die: any of various tools or devices for imparting a desired shape, form, or f nish to a material or for impressing an object or material. 1.8.4 Die Closure die closure: allowable part variation caused by inconsis- tent mating of opposing segments of a mold or die (see Fig. 3-2). 1.8.5 Draft draft: the taper given to a part so that it can be withdrawn from the mold or die (see Fig. 3-1). 1.8.6 Drawing drawing: an engineering document or digital data f le(s) that discloses (directly or by reference), by means of graphic or textual presentations, or by combinations of both, the physical or functional requirements of an item (ASME Y14.100).

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