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datum planes

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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 Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005535
EISBN: 978-1-62708-197-9
..., modeling is greatly facilitated by using constrained sketches. They provide the user with the ability to truly capture design intent from a 2-D perspective at first, then 3-D later. The entity is created on a default flat plane, or datum plane, and used in subsequent operations to create 3-D geometry. A...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005277
EISBN: 978-1-62708-187-0
... listed as follows: Six points, as illustrated in Fig. 12 , are required to define the position of a component with orthogonal datum planes that is designed for essentially rectilinear machining, such as for an automotive cylinder head. (Any fewer points is insufficient, and any more will ensure...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006306
EISBN: 978-1-62708-179-5
... a specific casting. The casting designer, metallurgist, and cutting tool engineers should work together to establish datum planes and points. These as-cast datum points and surfaces are used to secure the workpiece in the machine. Variations in the real casting dimensions against datum points...
Book Chapter

By Jian Cao
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005166
EISBN: 978-1-62708-186-3
... Strain-hardening exponent ( n ) 0.306 0.295 Poisson's ratio 0.3 0.3 The effect of gap on springback is presented in Fig. 13 . Each isolated symbol represents one experimental datum, and various finite element models and material models were compared. A trend of major parameters to...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005331
EISBN: 978-1-62708-187-0
... common wrought alloys, the grains are growing in a plane front or cellular manner. Growth restriction will lead to greater undercooling and, hence, increased nucleation. High-silicon alloys, on the other hand, are solute rich and grow in a completely dendritic manner. As solute is efficiently directed...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003025
EISBN: 978-1-62708-200-6
... transition. The tangent modulus decreases with increasing strain (to zero if the specimen yields with a sharp neck). Its value at the origin of the stress-strain curve is higher than that of any of the secant moduli. For this reason, it is often quoted as a characterizing datum by those proclaiming the...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003389
EISBN: 978-1-62708-195-5
... , τ x y ] T Also, let Δ T and Δ m represent the change in temperature and moisture content, respectively, of the element from some datum values. The hygrothermal effects may be important to consider in the analysis of composite structures, due to certain service conditions. (See the...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005255
EISBN: 978-1-62708-187-0
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
...-defined groups of geometry with well-defined dimensional attributes and a datum point (or origin) with which 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...
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
... cause problems if they contact fixturing targets. It is best to define the casting dimensional datums as the significant installation surfaces, in order of function priority, based on how the casting is actually used. Targets for machining fixtures should be consistent with these datum principles...
Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002165
EISBN: 978-1-62708-188-7
.... The datum surfaces on the shanks and plates that locate the electrodes during fabrication are the same as those used to locate the electrodes in the EDM machine. The EDM machine location should be so reliable that once dimensional inspection is done outside the EDM machine, the location is ensured...
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: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002434
EISBN: 978-1-62708-194-8
... possible from the same datum line. These steps help avoid errors when the parts enter production. Source: Ref 12 These, aside from being costly, have been found to be potential sources of quality problems. (This applies to both mechanical and electrical adjustments.) Adjustments also necessitate...
Book Chapter

Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005117
EISBN: 978-1-62708-186-3
... spaced as close to each other, or to the edge of the blank, as 50 to 70% of stock thickness. Total tolerances obtainable are 0.013 mm (0.0005 in.) on hole diameter and for accuracy of blank outline; 0.025 mm (0.001 in.) on hole location with respect to a datum surface; and 0.025 mm (0.001 in.) on...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003292
EISBN: 978-1-62708-176-4
... dependence of strain rate in commercial purity Zn-22Al ( Ref 14 ) are shown in Fig. 6 , in which shear strain rate, γ ˙ , is plotted as a function of shear stress, τ, on a logarithmic scale. By identifying the individual datum points from the creep machine and universal testing machine (UTM) (a...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003177
EISBN: 978-1-62708-199-3
... the complexity of deformation and/or the strength of the material is very high. Generally, except in the case of ironing, sheet metal forming involves little or no thickness change. Deformation is generally biaxial in the plane of the sheet. However, there can be considerable relative motion between...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005337
EISBN: 978-1-62708-187-0
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005188
EISBN: 978-1-62708-187-0
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003586
EISBN: 978-1-62708-182-5