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metal flow

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040017
EISBN: 978-1-62708-300-3
... Abstract This chapter discusses the role of plastic deformation in forging and the effect of strain and strain rate on metal flow. It demonstrates the use of stress tensors and shows how metal flow can be represented qualitatively by the displacement of volume elements and quantitatively...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040051
EISBN: 978-1-62708-300-3
... Abstract This chapter covers the fundamentals of metal flow and the tools and techniques used to predict and control it. It begins by illustrating the local state of stress in a metal cylinder during upset forging and showing how stress components can be expressed in matrix form...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400203
EISBN: 978-1-62708-316-4
... they facilitate uniform metal flow into the die cavity of large deep-drawn parts. blank holder force cushion systems deep drawing material flow IN DEEP DRAWING, the sheet metal blank is subjected to restraining force at its periphery by the blank holder while it is forced to flow into the die cavity...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270097
EISBN: 978-1-62708-301-0
... of the bearings had been subjected to excessive friction, evidenced by brinelling, metal flow, heat tinting, deformation, and wear. They also observed extensive grooving on a retaining plate and several washers matching the diameter of the outer bearing races. Based on their findings, investigators concluded...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040007
EISBN: 978-1-62708-300-3
... Abstract This chapter explains that the key to forging is understanding and controlling metal flow and influential factors such as tool geometry, the mechanics of interface friction, material characteristics, and thermal conditions in the deformation zone. It also reviews common forging...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040059
EISBN: 978-1-62708-300-3
... Abstract This chapter discusses the factors that influence temperature in forging operations and presents equations that can be used to predict and control it. The discussion covers heat generation and transfer, the effect of metal flow, temperature measurement, testing methods...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040193
EISBN: 978-1-62708-300-3
... Abstract This chapter discusses the use of finite-element modeling in forging design. It describes key modeling parameters and inputs, mesh generation and computation time, and process modeling outputs such as metal flow, strain rate, loading profiles, and microstructure. It also includes...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040083
EISBN: 978-1-62708-300-3
... Abstract This chapter discusses the role of inverse analysis in providing input data for finite element simulations of metal forming processes. It describes the basic procedures for determining flow stress and friction by inverse analysis and for comparing experimental measurements...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2012
DOI: 10.31399/asm.tb.pdub.t53420429
EISBN: 978-1-62708-310-2
... of each grain is randomly oriented. Inside of the chill zone, there are a series of columnar, or column-shaped, grains that are oriented almost parallel to the heat flow direction. Because each metal grows more favorably in one principal crystallographic direction, only those grains favorably oriented...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500249
EISBN: 978-1-62708-317-1
... Abstract Sheet metal spinning is a forming technique that produces axially symmetric hollow bodies with nearly any contour. It is often used in combination with flow forming and shear spinning to manufacture a wide range of complex parts. This chapter describes the operating principles, stress...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270074
EISBN: 978-1-62708-301-0
... Abstract This chapter discusses the key findings of an investigation into the failure of an aircraft engine fuel pump. It explains how investigators came to the conclusion that metal slivers from a heavily worn spring may have interrupted the flow of lubricant to one of the slipper pads...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400033
EISBN: 978-1-62708-316-4
... Tiefungsversuch und die Ermittlung vonFließkurven” (“The Hydraulic Bulge Test and Determination of the Flow Stress Curves” ), Ph.D. dissertation, Institute for Metal Forming Technology, University of Stuttgart, 1959 4.15 Gologranc F. , “Beitrag zur Ermittlung von Fließkurven im kontinuierlichen...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400053
EISBN: 978-1-62708-316-4
... multiaxial states of stress. A criterion used for determining the condition of continuing plastic flow is also called the flow criterion . In the uniaxial compression or tensile test, the metal starts to flow plastically when the stress in the material reaches the material’s yield stress: σ = F...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040185
EISBN: 978-1-62708-300-3
... Shape Manufacturing, The Ohio State University , 1999 . [Nagpal et al., 1975] Nagpal V. , and Altan T. , “ Estimation of Forging Load in Closed-Die Forging, ” Battelle Columbus Laboratories , 1975 . [Schey et al.] Schey J.A., et al. , “ Metal Flow in Closed-Die Press...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2000
DOI: 10.31399/asm.tb.aet.t68260087
EISBN: 978-1-62708-336-2
... bearings and metal flow, die bearing surfaces, design systems, and treatments, hollow dies and special die designs. Hard coatings for the die bearings have been presented. For the beginners in aluminum extrusion technology, it is very important to understand the fundamentals of extrusion die technology...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2000
DOI: 10.31399/asm.tb.aet.t68260001
EISBN: 978-1-62708-336-2
.... , The Extrusion of Metals , 2nd ed. , Chapman and Hall Ltd. , London , 1960 9. Valberg H. , A Modified Classification System for Metal Flow Adapted to Unlubricated Hot Extrusion of Aluminum and Aluminum Alloys , Proc. Sixth International Aluminum Extrusion Technology Seminar , Aluminum...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040159
EISBN: 978-1-62708-300-3
... such as laps, cold shuts, or folds. Before being used in production, forging dies are tested to verify proper filling of the die cavities. The most commonly used method of process verification is die tryout in which full-scale dies are manufactured and prototype parts are forged to determine metal flow...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040237
EISBN: 978-1-62708-300-3
... finite-element analysis friction process modeling References [Altan et al., 1990] Altan T. , Oh S.I. , “ Application of FEM to 2-D Metal Flow Simulation: Practical Examples, ” Advanced Technology of Plasticity , Vol 4 , p 1779 , 1990 . [Altan et al., 2001...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040091
EISBN: 978-1-62708-300-3
... , 1953 . [Kobayashi et al., 1989] Kobayashi S. , Oh S.I. , Altan T. , Metal Forming and the Finite Element Method , Oxford University Press , 1989 . [Lee et al., 1972] Lee C.H. , Altan T. , “ Influence of Flow Stress and Friction upon Metal Flow in Upset Forging...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.aceg.t68410103
EISBN: 978-1-62708-280-8
.... The accumulator provides the hydraulic power needed for the plunger. Fig. 6.14 Die casting machine hydraulic system schematic The effective pressure needed to advance the plunger is slightly reduced by the power needed for the flow through the machine system elements. If there is no metal...