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Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004034
EISBN: 978-1-62708-185-6
... Abstract This article schematically illustrates the basic types of drafts used in forging design, including outside draft, inside draft, blend draft, natural draft, shift draft, and back draft. The amount of draft, or the draft angle, is designated in degrees and is measured from the axis...
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Published: 01 January 1990
Fig. 14 Definition of inside and outside draft and limitations on the depth of the cavities between the ribs. Typically, inside-draft angles exceed outside-draft angles. More
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Published: 01 January 2005
Fig. 18 Definition of inside and outside draft and limitations on the depth of the cavities between the ribs. Typically, inside-draft angles exceed outside-draft angles. More
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Published: 01 December 1998
Fig. 10 Definition of inside and outside draft and limitations on the depth of the cavities between ribs. More
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003097
EISBN: 978-1-62708-199-3
... on the amount of metal needed for draft is illustrated by Fig. 9 . Fig. 9 Effect of part size on the amount of metal needed for draft in a forging Inside draft is draft on surfaces that tightens on the die as the forging shrinks during cooling; examples are cavities such as narrow grooves...
Series: ASM Handbook
Volume: 1
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v01.a0001021
EISBN: 978-1-62708-161-0
... that requires the least machining to satisfy finished-part requirements has the best properties. Thus, a finished part machined from a blocker-type forging usually exhibits mechanical properties and corrosion characteristics inferior to those of a part made from a close-tolerance, no-draft forging...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003991
EISBN: 978-1-62708-185-6
... from a blocker-type forging usually exhibits mechanical properties and corrosion characteristics inferior to those of a part made from a close-tolerance, no-draft forging. It should be anticipated that decreasing the amount of stock that must be removed from the forging by machining will almost...
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Published: 01 January 2005
required extensive machining on inside and outside surfaces of tabs to remove draft and provide desired finish dimensions. (e) Included in length and width tolerance. (f) Chamfer permissible More
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Published: 01 January 2005
particle (f) Weight of forging (approx) 35.4 kg (78 lb) Weight of finished part 12 kg (26.5 lb) (b) Plan area (approx) 445 cm2 (69 in.2) net Parting line (g) Draft angle 7° (±2°) Minimum fillet radius 9.5 mm (0.375 in.) Minimum corner radius 4.8 mm (0.188 in.) Web More
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Published: 01 January 2005
; follows center plane of web Draft angle Outside, 2° (+6, −0°); inside, 2 1 2 ° max Minimum rib width 6.4 mm (0.25 in.) Maximum rib height-to-width ratio 5.7:1 Minimum and typical fillet radius 4.8 mm (0.19 in.) (e) Minimum and typical corner radius 3.3 mm (0.13 in.) Web More
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004033
EISBN: 978-1-62708-185-6
... heights. (b) Full-rounded ribs. (c) Machining and web qualifications. (d) Intersections The plan view of a rib shows its width and draft, but not the corners and fillets ( Fig. 3b ). The width of a full-rounded rib (section A-A of Fig. 3b ) is described in detail B at the points of straight-line...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0009018
EISBN: 978-1-62708-187-0
... solutions to molding and coring problems and describes the molding sequence. Draft refers to the amount of taper given to the sides of a pattern to enable it to be withdrawn easily from the mold. The article concludes with a simple example demonstrating the influence of a casting requirement...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004036
EISBN: 978-1-62708-185-6
... it. In Fig. 1(a) , the flash is divided equally on either side of the parting line and is equally distributed between the upper and lower dies. This distribution of flash is common when the draft angle assigned to the forging is the same on both sides of the parting line, as in Fig. 1(a) . In small forgings...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0009019
EISBN: 978-1-62708-187-0
... for making the wax or plastic pattern for tubular investment custing shown at left. Note draft to permit withdrawal of the core from the pattern. The wax pattern for investment molding shown in Fig. 19 incorporates an inside radius at the junction of the two cores. Metal cores A and B are required...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004038
EISBN: 978-1-62708-185-6
... designs are classified for convenience in terms of draft, location on the web, location with respect to the parting line, and by profile. The basic types of ribs and bosses illustrated in Fig. 1 are described subsequently. Fig. 1 Specimen forging, illustrating principal types of ribs and bosses...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004040
EISBN: 978-1-62708-185-6
... is displaced progressively by the forging punch, and the flow of metal is concentric, or parallel, to the outline of the punch. A punch is that portion of the forging die, comprising a single component or insert, that actually forges a cavity or hole. An exception to this definition exists in no-draft forging...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003997
EISBN: 978-1-62708-185-6
..., short (up to 150 mm incl.) 0.25 (0.010) 0.3 (0.012) 0.3 (0.012) 0.36 (0.014) Thin section, long (over 150 mm incl.) 0.4 (0.015) 0.4 (0.015) 0.4 (0.015) 0.5 (0.020) Thin section, round 0.25 (0.010) 0.3 (0.012) 0.3 (0.012) 0.36 (0.014) Draft angles (outside and inside 1° to 5...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004039
EISBN: 978-1-62708-185-6
... of their physical connection to other elements of a forging, the design of webs must be considered along with the design of ribs and bosses, the location of the parting line, the assignment of draft, and the selection of corner and fillet radii. Unconfined and Confined Webs Because webs are connectives...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006927
EISBN: 978-1-62708-395-9
... as closely as the part design and process allow. Draft Generally accepted industry practices suggest making a draft, or taper, of a part face, of 1.5 to 2 degrees on vertical female features and walls and 4 to 6 degrees on standing male features. This draft assists with material flow during forming...
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002441
EISBN: 978-1-62708-194-8
... they can be easily positioned in the design. Design features include countersunk holes, through holes, tapered holes, bosses, pockets, tabs, draft angles, blends, fillets, shells, and many others. They simplify the design process by combining complicated but easily sized geometry with the appropriate...