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direct extrusion

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.ex2.t69980323
EISBN: 978-1-62708-342-3
...Presses for the direct extrusion of aluminum alloys (light metal), copper alloys (heavy metal), and steel Table 6.1 Presses for the direct extrusion of aluminum alloys (light metal), copper alloys (heavy metal), and steel Direct-extrusion presses (a) Equipment Light metal...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.ex2.t69980059
EISBN: 978-1-62708-342-3
... Fig. 3.1 (a) Direct extrusion processes. (b) Indirect extrusion processes. (c) Hydrostatic extrusion processes. (d) Special extrusion processes Fig. 3.2 Process sequence of direct hot extrusion without lubrication and without a shell, with loose dummy block. a, platen; b, die holder...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.ex2.t69980001
EISBN: 978-1-62708-342-3
...Abstract Abstract This chapter provides an overview of the basic principles and historic development of metal extrusion processes. It starts by illustrating the two major process categories: direct extrusion and indirect extrusion. It then briefly defines hydrostatic extrusion and the conform...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.ex2.t69980417
EISBN: 978-1-62708-342-3
... of the direct and indirect extrusion tools for indirect shape forming Table 7.5(a) Overview of the direct and indirect extrusion tools for indirect shape forming (a) Resistance heating in container holder. Source: Groos Overview of the direct and indirect extrusion tools for indirect...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2000
DOI: 10.31399/asm.tb.aet.t68260001
EISBN: 978-1-62708-336-2
...Abstract Abstract This chapter discusses the basic differences between direct and indirect extrusion, the application of plastic theory, the significance of strain and strain rate, friction, and pressure, and factors such as alloy flow stress and extrusion ratio, which influence the quality...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.ex2.t69980195
EISBN: 978-1-62708-342-3
...Abstract Abstract Compared with other deformation processes used to produce semifinished products, the hot-working extrusion process has the advantage of applying pure compressive forces in all three force directions, enhancing workability. The available variations in the extrusion process...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2000
DOI: 10.31399/asm.tb.aet.t68260055
EISBN: 978-1-62708-336-2
.... Sixth International Aluminum Extrusion Technology Seminar , Vol 1 , Aluminum Association and Aluminum Extruders Council , 1996 Direct Press Indirect Press Combination Direct/Indirect Press Extrusion with Active Friction Force (EwAFF) The unit pressure required for extrusion...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2000
DOI: 10.31399/asm.tb.aet.t68260029
EISBN: 978-1-62708-336-2
... R.A.P. , and Macey G. , Isothermal Extrusion , Light Met. Age , April 1999 Heat Balance in Direct Extrusion Significant research has been done on temperature model and temperature distribution during extrusion. One of the current and simple finite difference models is discussed...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2000
DOI: 10.31399/asm.tb.aet.t68260087
EISBN: 978-1-62708-336-2
...(98)00210-5 Direct Extrusion Indirect Extrusion Die design and die making are the most important and demanding aspects of the entire extrusion process. Die design is influenced by many factors including press procedure and maintenance, understanding of the section or profile and its...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.ex2.9781627083423
EISBN: 978-1-62708-342-3
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2000
DOI: 10.31399/asm.tb.aet.t68260119
EISBN: 978-1-62708-336-2
...Abstract Abstract This chapter describes various aspects of the billet making process and how they affect the quality of aluminum extrusions. It begins with an overview of the direct-chill continuous casting technique and its advantages over other methods, particularly for hard aluminum alloys...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2000
DOI: 10.31399/asm.tb.aet.t68260149
EISBN: 978-1-62708-336-2
... process parameters. The advantage of the approach is its practicality. They used an inexpensive method by changing the die design using a direct extrusion press and developed an algorithm for calculating the optimum temperature and speed conditions for a given extrusion. Reiso ( Ref 4 ) investigated...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2000
DOI: 10.31399/asm.tb.aet.t68260187
EISBN: 978-1-62708-336-2
... of the extrusion does not exceed the incipient melting temperature of that particular alloy. Some of the typical extrusion defects, mentioned by Dieter ( Ref 14 ), related to the harder alloys are discussed in this section. In homogeneous deformation during direct extrusion, the center of the billet moves...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240279
EISBN: 978-1-62708-251-8
... produce very complex sections with mirror-surface finishes and close dimensional tolerances that are considered to be net extrusions. There are basically two methods of hot extruding materials without lubrication: (1) forward, or direct, extrusion; and (2) backward, or indirect, extrusion ( Fig. 16.18...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.ex2.t69980141
EISBN: 978-1-62708-342-3
.... , “Preßfehlerkatalog; Fehlererscheinungen bein direkten Strangpressen von Kupferwerkstoffen” (“Defects in the Direct Extrusion of Copper Alloys”), manuscript, AK Schwermetall im Strangpreβausschuβ, DGM [Fie 57]: Fields D.S. and Backofen W.A. , Determination of Strain Hardening Characteristics...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.ex2.t69980009
EISBN: 978-1-62708-342-3
... containers on the 98,000 kN direct extrusion press operated by Alusuisse in Singen (Germany) ( Fig. 2.7 ). Solid flat sections with maximum dimensions of 800 by 100 mm (width by height) and flat hollow sections with a maximum size of 800 by 60 mm can be produced from the same round container by using...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280117
EISBN: 978-1-62708-267-9
... a specialized container with a nose plug designed to protect the evacuation stem on the container from rupturing prior to entering the extrusion die. Extrusion ratios used for direct extrusion of powder are at least 7 to 1. In the extrusion process, pressure forces the metal (container and powder) through...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240487
EISBN: 978-1-62708-251-8
..., nitrogen, or argon gas through the melt. The semicontinuous direct-chill process is the mostly widely used process for casting commercial ingots that will receive further processing, such as rolling, extrusion, or forging. It produces fine-grained ingots at high production rates. As shown in Fig. 26.7...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060117
EISBN: 978-1-62708-261-7
... region. The main difference is that extrusion involves either pushing the workpiece through the die ( direct extrusion ) or pushing a die over a stationary workpiece ( indirect extrusion ). Extrusion dies and profiles can be more complex than the reduced profiles generated by drawing. Drawing also...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230295
EISBN: 978-1-62708-298-3
... forging sequences were used in each case. One involved back extrusion and forming; another involved upsetting, back extrusion, and forming; and the third involved forward extrusion, upsetting, back extrusion, and forming. An optimum combination of properties for both circumferential and axial directions...