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straight-knife shearing defects

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040151
EISBN: 978-1-62708-300-3
... cutting, or flame cutting. Billets and bar sections are sheared between the lower and upper blades of a machine in which only the upper blade is movable. There are also shears, such as impact cutoff machines, that utilize a horizontal knife movement to shear the bar sections. The shear blade...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2013
DOI: 10.31399/asm.tb.mfub.t53740163
EISBN: 978-1-62708-308-9
... stock to required shape and size. It is primarily used for square and rectangular shapes, although triangles and other straight-sided shapes can also be sheared with straight blades. Rotary shearing is used for producing circular or other contoured shapes from sheet or plate. Straight-Knife Shearing...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500211
EISBN: 978-1-62708-317-1
..., the final shape of the profile is divided into straight and curved sections. The total length is the sum of these sections. The length of the straight sections remains constant during forming. In the bending zone, the thinning of the material is very high compared to the rest of the strip. This thinning...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250257
EISBN: 978-1-62708-345-4
... worn to a knife-edge from both sides. (b) A similar pinion with teeth worn completely away by adhesive wear Fig. 37 Specimen gear with scuffing failure. Source: Ref 4 Fig. 38 An internal rupture in a gear tooth at the case/core transition zone. The rupture does not reach...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610585
EISBN: 978-1-62708-303-4
... thinning. The most common examples of this type of fracture occur in slitting, blanking, and trimming. In these operations, sheets are sheared by knife edges that apply forces normal to the plane of the sheet. Shearing failures are sometimes produced in stamping operations by shearing forces in the plane...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.9781627083164
EISBN: 978-1-62708-316-4
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400233
EISBN: 978-1-62708-316-4
... to the press stroke. See also cam slide or specific cams: aerial cam, dwell cam, incline cam, shimmy cam, straight cam, and box cam. cam action A motion at an angle to the direc- tion of an applied force achieved by a wedge or cam. camber The tendency of material being sheared from a sheet to bend away from...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870307
EISBN: 978-1-62708-314-0
...-head fasteners, it is important not to countersink too deeply and create a knife-edge condition in the countersunk member. A knife edge creates a significant stress riser and also allows the fastener to tilt and rise up on the countersink surface, resulting in low joint yield strength and reduced...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870449
EISBN: 978-1-62708-314-0
... cycling. Therefore, double shear joints are preferable when possible. Some propose that in the analysis of countersunk fasteners, the head should be totally discounted. Such an approach means restricting the depth of the countersink. The countersink depth has to be closely controlled to prevent a knife...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2013
DOI: 10.31399/asm.tb.mfub.t53740103
EISBN: 978-1-62708-308-9
... of the bottom web but below the top of the wall can disrupt the grain flow and cause forging defects. Because the dies move only in a straight line, and because the forging must be removed from the die without damage to either the impression or to the forging, die impressions can usually have no undercuts...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060117
EISBN: 978-1-62708-261-7
.... As the sole operation, or as the main operation, in producing a shape, roll forging generally involves the shaping of long, thin, often tapered parts. Typical examples are airplane propeller blade half sections, tapered axle shafts, tapered leaf springs, table knife blades, hand shovels and spades, various...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.9781627083003
EISBN: 978-1-62708-300-3
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060429
EISBN: 978-1-62708-261-7
... carbonitriding. A case hardening process in rises after fracture of the specimen. Contrast which a suitable ferrous material is heated with Izod test. above the lower transformation temperature chevron pattern. A fractographic pattern of ra- in a gaseous atmosphere of such composition dial marks (shear ledges...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630117
EISBN: 978-1-62708-270-9
..., but for practical purposes, the above description is adequate. Electron micrographs of striations in forged titanium alloys are shown in Fig. 5 and 6 . Note the range of striation appearance and spacing and the slight curvature of the striations as opposed to straight linear features, such as slip lines or other...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.9781627082617
EISBN: 978-1-62708-261-7
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 September 2023
DOI: 10.31399/asm.tb.stmflw.t59390241
EISBN: 978-1-62708-459-8
... hydroextrusion process for preparing bars for wire drawing, mainly to take advantage of the resulting refined microstructure [ 4 – 6 ]. The distinction between bar and wire is subjective. Bar is generally of larger diameter (over 6 mm) and is drawn straight, although the smaller gages are sometimes produced...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1983
DOI: 10.31399/asm.tb.mlt.9781627083485
EISBN: 978-1-62708-348-5
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550511
EISBN: 978-1-62708-307-2
... material for knife edge applications, including scissors, slitter blades, knife blades, and scalpels. However, compared to Mg-PSZ, Y-TZP is more expensive, has a lower fracture toughness, and is not nearly as flaw tolerant. There are some temperature limitations in these materials. Mechanical strength...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130001
EISBN: 978-1-62708-284-6
...). Martensite is a supersaturated solid solution of carbon in alpha iron (ferrite) that is less densely packed than the γ body-centered tetragonal lattice and is a magnetic platelike structure formed by a diffusionless shear type of transformation of austenite below the martensite start (M s ) temperature...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870119
EISBN: 978-1-62708-314-0
..., is the most prevalent method used today. Both reciprocating knives and ultrasonically driven ply-cutting methods are currently used in the composites industry. The reciprocating knife concept originated in the garment industry. In this process, a carbide blade reciprocates up and down, similar to a saber saw...