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conical-die extrusion

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Published: 01 January 2005
Fig. 1 Conical die extrusion process More
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005542
EISBN: 978-1-62708-197-9
...Abstract Abstract This article is a comprehensive collection of tables containing formulas for metals processing, namely, casting and solidification, flat (sheet) rolling, conical-die extrusion, wire drawing, bending, and deep drawing. Formulas for compression, tension, and torsion testing...
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: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004030
EISBN: 978-1-62708-185-6
.... The article also provides formulas for flat rolling, conical-die extrusion, wire drawing, deep drawing of cups from sheet metal, and bending, and formulas for anisotropic sheet materials. bending conical-die extrusion deep drawing flat rolling sheet metal forming strain strain rate stress...
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005181
EISBN: 978-1-62708-186-3
... anisotropic yield function Yld2000-2d for plane-stress deformation of sheet material. It also contains formulas related to flat (sheet) rolling, conical-die extrusion, wire drawing, bending, and deep drawing of cups from sheet metal. arbitrary coordinates Barlat's anisotropic yield function...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003429
EISBN: 978-1-62708-195-5
... shapes have been made with forward extrusion with a die and mandrel and with “bridge” dies as well as backward extrusion. An example of a die and mandrel setup is shown in Fig. 2 . The hole for the mandrel to pass through may be created by drilling billets or by piercing the billet in the extrusion...
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Published: 30 September 2015
Fig. 16 Comparison of load profiles of simple hydrostatic extrusion and conventional extrusion. (a) Conventional. (b) Hydrostatic with conical die More
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004006
EISBN: 978-1-62708-185-6
... to the set speed. A somewhat conical-shaped deformation zone develops in front of the die aperture, as illustrated in Fig. 1(a) . After the maximum load has been reached and the ram speed is constant, the extrusion pressure decreases as the billet is extruded, and contact area with the container decreases...
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: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006085
EISBN: 978-1-62708-175-7
... a conically defined surface ( Ref 6 , 16 ). As the included cone angle decreases from the extreme case of the flat die, flow becomes more streamlined, and the ogival characteristic of the transverse grid lines becomes less pronounced. Conical dies are used for the extrusion of canned powder to avoid...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004013
EISBN: 978-1-62708-185-6
.... Friction extrusion belongs to the general class of friction processing that relies on the heat generated by frictional forces to join or form metals. Friction extrusion involves rotating a round bar and pressing it against a die to produce sufficient frictional heating to allow softened material to extrude...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006534
EISBN: 978-1-62708-207-5
... temperatures can rise significantly, leading to surface cracking and tearing (fir-tree cracking or speed cracking). Fig. 1 Deformation zone in extrusion or drawing solid section through a conical die. Rigid and plastic zones are illustrated; center-burst (chevron) cracking occurs when plastic zones do...
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
...) alloy, using polytetrafluoroethylene (PTFE) as the lubricant, and castor oil as the pressurizing fluid. This approach may be applicable to conventional cold extrusion through a lubricated conical die ( Ref 83 ). Hydrostatic Extrusion of Intermetallics or Intermetallic Compounds Comparatively...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004032
EISBN: 978-1-62708-185-6
... to be needed for optimum melt-away performance. At heavy reductions, a flat die is the simplest, eliminating the need for a conical billet end and ensuring optimum conditions even at extrusion ratios that would lead to severe inhomogeneity in unlubricated extrusion ( Fig. 9 ). In unlubricated metal flow...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.9781627081856
EISBN: 978-1-62708-185-6
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0009004
EISBN: 978-1-62708-185-6
..., are subjected to three-dimensional stress states. For example, material at the die contact surfaces in forging, extrusion, and rolling ( Fig. 5 ) is subjected to strains ε 1 and ε 2 in the plane of the surface, as in Fig. 2 , 3 , 4 . In Fig. 5 , however, this surface is also acted upon by pressure P 3...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005539
EISBN: 978-1-62708-197-9
... extrusion in conical dies, guaranteeing chevron-free parts ( Ref 23 ). Upper-bound methodologies were used to determine the conditions under which chevrons would form. Based on die-cone angle, process reduction, and friction conditions, Avitzur derived mathematical expressions to describe the central...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004021
EISBN: 978-1-62708-185-6
... die was used to distribute the volume. This sharp step then gets pushed into the tapered die during the backward extrusion, creating a fold on the exterior of the part. The fold develops midstroke and moves upward as the extrusion progresses. The location of this external lap predicted...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006864
EISBN: 978-1-62708-395-9
..., the selection of processing temperature is based on careful viscosity measurements carried out in a capillary rheometer at high shear rates. The shear rates observed during extrusion range from 0 s −1 at the centerline of the flow channel to 1000’s s −1 observed along the wall of the die lips. When running...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.9781627083959
EISBN: 978-1-62708-395-9