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tolerance design

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Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004035
EISBN: 978-1-62708-185-6
... Abstract The design of forging operations; consisting of dies, fixturing, and parts; requires a consistent and unambiguous method for representing critical dimensions and tolerances. This article presents a dimensioning process, based on tooling points and datum planes, with the potential to...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003176
EISBN: 978-1-62708-199-3
... Abstract This article provides general guidelines for casting design to provide progressive solidification, minimize heat concentration, eliminate cores, and prevent distortion. Casting design also affects tolerances. Casting tolerances depend on the alloy being poured, the size of the casting...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0009020
EISBN: 978-1-62708-187-0
... operations in design. The article describes the factors that control casting tolerances and provides specific tips for designing castings with uniform wall thickness and unequal sections, designing thin sections, designing for economical coring, designing for functional packaging, and core design principles...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003060
EISBN: 978-1-62708-200-6
... Abstract The design process for ceramic materials is more complex than that of metals because of low-strain tolerance, low fracture toughness and brittleness. The application of structural ceramics to engineering systems hinges on the functional benefits to be derived and is manifested in the...
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
... draft angle, is designated in degrees (as are draft-angle tolerances) and is measured from the axis of the hammer or press stroke. Draft angles, with few exceptions, are designed with straight sides; this simplifies both designing and diesinking. Typical draft-angle tolerances are ± 1 2 or...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003972
EISBN: 978-1-62708-185-6
... the overall system. Manufacturing process selection and parameters must meet these geometric requirements of overall shape, features, dimensions, and dimensional tolerances, depicted in Fig. 1a . Fig. 1 Connecting rod as a part design example. (a) Typical geometric dimensional requirements. (b...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0009025
EISBN: 978-1-62708-187-0
... dimension B being greater than those of dimension A. Fig. 3 Distortion from roundness of the cored holes in these two investment castings was related to the location of gates Most castings are designed to be strong enough so that dimensions will not be thrown out of tolerance by the contractive...
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.9781627081948
EISBN: 978-1-62708-194-8
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
... corner radii, and progressively smaller radii are suitable for conventional, precision, and close-tolerance forgings. Each of the forging processes has limits of adjustment for size of radii and complexity of design. The composition of the metal being forged is also a factor in determining the adequacy...
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
... to the designer-user lies in his prerogative to establish flash-extension tolerances. It is common practice for the designer to select the limits on flash extension that will be permitted on finished forgings. Finally, the designer may specify a particular flash-line surface finish, particularly if...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003087
EISBN: 978-1-62708-199-3
... and only a few manufacturing processes. Here the emphasis will be on deciding on critical tolerances, optimizing for robust design, and selecting the best manufacturing process using quality engineering and cost modeling methodologies. Depending on the criticality of the part, materials properties may...
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
... strength and rigidity. Dimensions given in inches Fig. 5 Close-tolerance forging for a pylon bulkhead fitting, with peripheral ribs designed as faying surfaces for fastening to the pylon assembly. Dimensions given in inches Fig. 6 Conventional forging for a cam actuator link fitting...
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
... Abstract Cores are separate shapes, of sand, metal or plaster, that are placed in the mold to provide castings with contours, cavities, and passages. Cored holes should be designed as simply as the intended function of the casting permits. This article describes the designing of casting for the...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003223
EISBN: 978-1-62708-199-3
... 300 compositions of aluminum covering wrought and cast alloys, many are designed to tolerate the variations in composition and ranges in impurity content that may be experienced in the recovery of scrap. For aluminum, the chemical content of extrusion alloys is the most critical; they cannot be made...
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
... webs. Dimensions given in inches A blocker-type version of this forging, forged in the rectilinear position, weighed 1.73 kg (3.82 lb), compared with 0.52 kg (1.15 lb) for the close-tolerance forging produced by tilting. The finished fitting weighed 0.17 kg (0.37 lb). A web design that included...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0009014
EISBN: 978-1-62708-187-0
... optimized to use an absolute minimum amount of material while satisfying durability, stiffness, natural frequency, and other structural and performance targets. The design guidelines must therefore facilitate design for damage tolerance, design for manufacture, and design for inspection. Capture and...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003088
EISBN: 978-1-62708-199-3
... manufactured and assembled, but they also must function as intended. This requires selecting and understanding the physical principles by which the product will operate. Moreover, proper function requires special attention to tolerances. These two considerations are called designing for function and fit...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004037
EISBN: 978-1-62708-185-6
... location. The tables that accompany the illustrations for the examples contain data relevant to the forging design, in addition to the placement of the parting line. These design parameters are as-specified. This circumstance is especially pertinent to review of tolerances. Forging processes (like all...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0009021
EISBN: 978-1-62708-187-0
... the foundry's extensive experience with stainless steel. Although type 431 stainless costs considerably more than 4340, this increase was more than offset by the higher percentage of acceptable castings produced in stainless steel. Fig. 6 This close-tolerance sand casting, although designed to...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0009015
EISBN: 978-1-62708-187-0
... can affect dimensional tolerances. Tables 2 and 3 briefly compare some of the typical capabilities of shape casting processes. The ratings and data are necessarily typical and approximate, as many material and design factors can influence the economical feasibility of a casting process. The tables...