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Book Chapter

By Soumya Subramonian
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500001
EISBN: 978-1-62708-317-1
...Abstract Abstract This chapter provides an overview of the blanking process and the forces and stresses involved. It discusses the factors that affect part quality and tool life, including punch and die geometry, stagger, clearance, and wear as well as punch velocities, misalignment, and snap...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400105
EISBN: 978-1-62708-316-4
... the effect of key process parameters including the draw ratio, material properties, geometry, interface conditions, equipment operating speed, and tooling. It then walks through the steps involved in predicting stress, strain, and punch force using the slab method and finite element analysis and presents...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500083
EISBN: 978-1-62708-317-1
... that affect heat transfer, die heating techniques, and press systems. It also discusses the effect of forming temperature, punch velocity, blank size, and other parameters on deep drawing processes, making use of both experimental and simulated data. aluminum alloys deep drawing die heating...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500157
EISBN: 978-1-62708-317-1
...Abstract Abstract This chapter describes a sheet metal forming method, called hydroforming, that uses pressurized liquid and a shaped punch or die. It discusses the advantages and disadvantages of the two approaches, the effect of process variations, and tooling modifications intended to reduce...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270031
EISBN: 978-1-62708-301-0
...Abstract Abstract This chapter discusses some of the more advanced methods and procedures used in failure analysis, including in-service material sampling, in situ microstructure analysis, and a form of punch testing that can determine the fracture toughness of any material from a tiny specimen...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500073
EISBN: 978-1-62708-317-1
... the number of forming stations, tool geometry for each station (punch and die diameter, punch corner, and die corner radii), draw depth for each forming station, and blank holder force (if needed) at each station. The challenging tasks in designing a process sequence are how to determine the minimum number...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500289
EISBN: 978-1-62708-317-1
... and form a second head, a pin, or bolt headed or clinched at both ends. The process in which this technique is implemented is called riveting ( Ref 14.1 ). Two main types of riveting processes are punch riveting and self-pierce riveting. Punch Riveting Figure 14.1 shows the riveting process...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500019
EISBN: 978-1-62708-317-1
... are common problems in terms of quality. All bent parts exhibit springback after unloading, and the amount of springback depends on die geometry, friction, bending angle, punch radius, and material properties. In the case of air bending, for example, the prediction of punch stroke becomes crucial...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040211
EISBN: 978-1-62708-300-3
...],</xref> <xref ref-type="bibr" rid="t51040211-ref19">[ICFG, 1992]</xref> 17.12 Punch Design for Cold Forging 17.13 Die Design and Shrink Fit <xref ref-type="bibr" rid="t51040211-ref24">[Lange et al., 1985],</xref> <xref ref-type="bibr" rid="t51040211-ref19">[ICFG, 1992]</xref> 17.14 Process Sequence Design 17.15 Parameters Affecting Tool Life...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.9781627083164
EISBN: 978-1-62708-316-4
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500051
EISBN: 978-1-62708-317-1
... methods ISO PUNCH Sollac, France SIMEX2 SimTech, France Source: Ref 3.2 The basic code features, such as static implicit, dynamic explicit, and inverse (one-step) methods indicated in Table 3.1 , are summarized as follows. Quasi-Static Implicit Approach The quasi-static...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400089
EISBN: 978-1-62708-316-4
... used to evaluate lubricants for stamping ( Ref 7.1 ). In the LDH test, the location of the fracture point depends on the frictional condition between the punch and the sheet. The material is primarily stretched with a small sliding motion; therefore, the test emulates the friction on the die or punch...
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
...-free 310 45 179 26 45 2.0 0.23 44 Source: Ref 13 Fig. 20 Principal components of a mechanical press brake. Source: Ref 12 Fig. 24 Forming limit diagram for aluminum-killed steel sheet. Adapted from Ref 14 Fig. 21 Dies and punches most commonly used...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400161
EISBN: 978-1-62708-316-4
... the slide anywhere at the desired stroke position, (c) carry out secondary operations such as painting, punching, or assembly, and (d) provide the necessary time for part transfer. Fig. 11.3 The flexibility of slide motion in servo-drive (or free motion) presses. Source: Ref 11.9 11.2 Servo...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ahsssta.t53700071
EISBN: 978-1-62708-279-2
... Stiffness Strength Strain Hardening Fatigue Crashworthiness Formability Toughness Bake Hardening Uniaxial Tension Hemispherical Punch Forming Deep Drawing Hole Expansion Toughness is defined as the resistance of a metal to fracture or its ability to absorb energy...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400005
EISBN: 978-1-62708-316-4
... of a punch and a die , which are the positive (male) and negative (female) portion of the tool set respectively. Often, these components are also referred to as “upper” and “lower” dies. Often, in producing discrete sheet metal parts, several successive forming operations are required to transform...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290111
EISBN: 978-1-62708-319-5
..., punched to add holes 0.02–2 0.0008–0.08 Continuous sheet for slicing, dicing, punching General categorization of shaping processes Table 6.1 General categorization of shaping processes Process Concept Solvent Temperature Pressure Additive Binder glues layered powder Yes...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400033
EISBN: 978-1-62708-316-4
... at the center using a hemispherical punch against a circular die cavity ( Fig. 4.22 ). The sheet material deforms following the contour of the punch and eventually fractures. The height of the dome or the punch travel and the maximum strain in the dome before failure indicate the stretchability of the material...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040007
EISBN: 978-1-62708-300-3
... cold extrusion processes (P, punch; W, workpiece; C, container; E, ejector). [ Feldman, 1977 ]. (b) Example of a component produced using forward rod and backward extrusion. Left to right: sheared blank, simultaneous forward rod and backward cup extrusion, forward extrusion, backward cup extrusion...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500107
EISBN: 978-1-62708-317-1
...), hybrid, and twisting ( Ref 6.47 ). A pure bending springback occurs only in plane-strain bending. The membrane springback is the elastic recovery of the in-plane tension/compression stresses. This type of springback may occur in pure stretch forming with dies having large die and punch radii. Shrinkages...