ASME Y14.8-2022 pdf download
ASME Y14.8-2022 pdf download.Castings, Forgings, and Molded Parts.
3.1 DEFINITIONS The following terms are defined as their use applies in this Standard. Nonmandatory Appendix A defines other commonly used terms for castings, forgings, and molded parts. 3.1.1 Casting casting: (a) a partobtained by solidification ofmaterial in a die or mold. (b) a process by which liquid material is introduced into a mold, is allowed to solidify inside the mold, and is subsequently removed, resulting in a part. 3.1.2 Corner Radius corner radius: the convex radius on the surface of a part connecting two or more surfaces. Also called edge radius. See Figure 3-1. 3.1.3 Die die: anyofvarious tools or devices for imparting a desired shape, form, or finish to a material or for impressing an object or material. 3.1.4 Die Closure die closure: allowable part variation caused by inconsis- tent mating of opposing segments of a mold or die. See Figure 5-15, illustrations (a), (b), and (c). 3.1.5 Draft draft: the angle given to afeature on a partso thatitcan be withdrawn from the mold or die. See Figure 5-14, illus- tration (a).
3.1.5.1 Drafted Fillet and Corner Radii drafted fillet and corner radii: filleted and cornered surfaces normal to the forging plane or parallel to the die removal direction where draft is required. NOTES: (1) Drafted fillet surfaces occur when the fillet connects two or more adjacent draft surfaces with the same draft angle. These drafted fillets and corners create a conical surface. See Figure 3-2, illustration (a). (2) Fillets and corners that connect two or more adjacent drafted surfaces with different draft angles do not create a conical fillet surface; they create a canted cylindrical surface. See Figure 3-2, illustration (b). 3.1.6 Drawing drawing: an engineering document or data set that discloses, directly or by reference, by means of graphic or textual or graphic and textual presentations, the physical or functional requirements of an item (ASME Y14.100). 3.1.7 Fillet Radius fillet radius: the concave radius on the surface of a part connecting two or more surfaces. See Figure 3-1. NOTE: Fillet radii are intended to minimize stress concentra- tions, aid in proper fill, and minimize defects. 3.1.8 Flash flash: excess material that results from leakage between mating surfaces of a mold or die. See Figure 5-11, illus- trations (a) and (b). 3.1.9 Flash Extension flash extension: allowable flash remnant. See Figure 5-11, illustrations (a) and (b). 3.1.10 Forging forging: (a) a part created by plastically deforming metal. (b) the process of creating a part by plastically deforming metal (normally preheated) with impact or pressure into a specific shape.3.1.11 Forging Plane forging plane: a plane perpendicular to the opening and closingdirectionofthe die. See Figure 5-2, illustrations (a) and (b). 3.1.12 Full Feature Axis fullfeature axis: similar to feature axis as defined in ASME Y14.5-2009, except that the unrelated actual mating envelope is a conical drafted feature, with its included angle being the sum of draft angles. 3.1.13 Full Feature Center Plane fullfeature centerplane: similar to feature center plane as defined in ASME Y14.5-2009, except that the unrelated actual mating envelope is a wedge of a drafted feature, with its included angle being the sum of draft angles. 3.1.14 Gate gate: a channel in a mold through which material flows into the mold cavity. 3.1.15 Grain Direction grain direction:thepredominantorientationofthefibrous crystalline structural units of wrought materials. See Figure 5-23. 3.1.16 Grain Flow grain flow:thedirectionalelongationinthegrainstructure of the material, and its nonhomogenous constituents, resulting from the forging process. Also called flow lines. NOTE: Grainflowfollows the directionofworkingduringforging and is usually revealed by polishing and etching sections ofthe forging.
