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reverse extrusion

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Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006385
EISBN: 978-1-62708-192-4
...Abstract Abstract This article discusses two basic forms of extrusion: cold and hot. It provides information on three types of extrusion processes, namely, direct extrusion, reverse extrusion, and hydrostatic extrusion. The article also discusses the mechanics, analysis, tooling and die design...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004040
EISBN: 978-1-62708-185-6
... employed in open-die work for starting a hole in a forging blank to make a preform. Piercing differs from extrusion, or reverse extrusion, in the relative amount of metal displaced in relation to the total volume. When the volume of metal displaced by the punch is very small in relation to the total volume...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003996
EISBN: 978-1-62708-185-6
...-die (or hand) forging, closed-die forging, upsetting, roll forging, orbital (rotary) forging, spin forging, mandrel forging, ring rolling, and forward and reverse extrusion. Selection of the optimal forging method for a given forging shape is based on the desired forged shape, the sophistication...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006518
EISBN: 978-1-62708-207-5
...) or indirect (reverse) extrusion process ( Fig. 7 ). In direct extrusion, a billet is pushed through a die. Frictional forces are high due to the large surface area at the billet/container interface during direct extrusion. A high extrusion force is required to initiate the process due to the friction...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004036
EISBN: 978-1-62708-185-6
... by deflection. Another from of flash, developed as a result of reverse extrusion, is common to seamless forging and is described in the next example. Example 8: Seamless Cylindrical Forging with Reverse-Extruded Flash The propeller barrel forging of AMS 6431 (D-6ac steel) shown in Fig. 12 was deep...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0009012
EISBN: 978-1-62708-185-6
... with information on some hot torsion application examples. compression hot tension testing hot torsion testing torsion testing workability PROCESS PARAMETERS for commercial hot working processes such as rolling, extrusion, and forging are normally based on prior experience with similar alloys...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003973
EISBN: 978-1-62708-185-6
...-bar press, which was originally developed for sheet metal forming and cold extrusion, is well suited for extrusion-type forming operations, where a nearly constant load is required over a long stroke. Fig. 14 Four-bar linkage mechanism for mechanical press drives Fig. 15 Load-stroke...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004037
EISBN: 978-1-62708-185-6
...Abstract Abstract Control of grain flow is one of the major advantages of shaping metal parts by rolling, forging, or extrusion. This article shows the effects of anisotropy on mechanical properties. Cylindrical forgings commonly have a straight parting line located in a diametral plane...
Series: ASM Handbook
Volume: 4E
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.hb.v04e.a0006262
EISBN: 978-1-62708-169-6
... 10.1016/j.matchar.2009.06.007 17. “Aluminum Alloy, Plate 6.4Zn-2.4Mg-2.2Cu-0.12Zr (7150-T7751), Solution Heat Treated, Stress Relieved, and Overaged,” AMS 4252B, Society of Automotive Engineers , 2012 18. “Aluminum Alloy, Extrusions, 6.4Zn-2.4Mg-2.2Cu-0.12Zr (7150-T77511) Solution Heat...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004007
EISBN: 978-1-62708-185-6
... into extrusion pressure: work of homogenous deformation, or the minimum work needed to change the shape of the billet into final product; redundant work, because of reversed shearing in the deformation zone; and work against friction at the billet/die interface ( Ref 34 ). As die angle is increased, the billet...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003183
EISBN: 978-1-62708-199-3
... or reverse extrusion. Lack of flash at the parting line decreases stress-corrosion cracking in forging alloys susceptible to this type of failure. Multidirectional hot working, characteristic of this process, decreases adverse directional effects on mechanical properties. Die Design and Materials...
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002481
EISBN: 978-1-62708-194-8
... for low-cost, high-precision products of wide size and wall-thickness range. Extrusion A billet held in a container is pushed against a die (direct or forward extrusion), or the die penetrates the billet (indirect or reverse extrusion), either hot or cold. Friction over the container and die...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004004
EISBN: 978-1-62708-185-6
... materials selection nut formers parts formers process sequence design punches reverse forming size drawing surface finish tolerance transfer headers upset diameter ratio upset length ratio upset strain warm heading workability COLD HEADING is a forming process of increasing the cross...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006580
EISBN: 978-1-62708-290-7
...Abstract Abstract Material extrusion systems are the most common types of additive manufacturing systems, also known as three-dimensional (3D) printers. This article focuses on the general 3D printing processes as can be demonstrated and manipulated in desktop printers. The discussion includes...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002355
EISBN: 978-1-62708-193-1
... down the PSB. Upon reverse loading, the same or similar segments travel in the opposite direction, and by this means reversibility occurs. However, the segments that emerge at the surface are not completely reversible. Thus, the formation of surface intrusions and extrusions is due to dislocation...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005456
EISBN: 978-1-62708-196-2
... is handled through the finite-element method. Source: Ref 12 , 20 Example 4: Extrusion The application of the slab method to extrusion has not been as widespread as in plane-strain drawing and flat rolling. This is primarily due to the complexity of deformation in extrusion, with considerable...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006526
EISBN: 978-1-62708-207-5
...Relative pressure requirements for the cold extrusion of annealed slugs of five aluminum alloys Table 1 Relative pressure requirements for the cold extrusion of annealed slugs of five aluminum alloys Alloy Relative extrusion pressure 1100 1.0 (a) 3003 1.2 6061 1.6 2014...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002353
EISBN: 978-1-62708-193-1
.... During perfect reversed loading on the same slip plane, this step is canceled; however, slip occurs on many planes, and the reversal is never perfect. Accumulation of slip steps in a local region leads to severe roughening of the surface. Thus, resistance to fatigue failure is greater for alloys...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004022
EISBN: 978-1-62708-185-6
... of optimization procedures: defining the objective function, calculating the objective function, and searching an optimum design. It concludes with an example illustrating the optimization of conical-die extrusion. conical-die extrusion dies forming optimum design DIE AND PREFORM OPTIMIZATION...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006485
EISBN: 978-1-62708-207-5
... and Electromagnetic Casting of Aluminum Alloys, Part I , Light Metals 1995 , TMS , 1995 • Epstein S.G. , Causes and Prevention of Molten Aluminum-Water Explosions , Proceedings of the Fourth International Aluminum Extrusion Technology Seminar , 1988 • Epstein S.G. , Causes...