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hammer forging

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Published: 01 December 1998
Fig. 15 Two types of die inserts used in hammer forging. (a) Full insert and master block for use in forging of gear blanks in hammers. (b) Multiple-impression insert for use when wear is excessive on one or more impressions. Such an insert is usually secured by a key. More
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Published: 01 December 1998
Fig. 8 Specific energy versus strain rate in the press and hammer forging of A-286 at three temperatures More
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Published: 01 January 2005
Fig. 8 Specific energy vs. strain rate in the press and hammer forging of A-286 at three temperatures. Source: Ref 6 More
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
... Abstract Hammers and high-energy-rate forging machines are classified as energy-restricted machines as they deform the workpiece by the kinetic energy of the hammer ram. This article provides information on gravity-drop hammers, power-drop hammers, die forger hammers, counterblow hammers...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003979
EISBN: 978-1-62708-185-6
... close-tolerance forgings conventional forgings friction hammers heating equipment lubrication presses shape complexity trimming CLOSED-DIE FORGING, or impression-die forging, is the shaping of hot metal completely within the walls or cavities of two dies that come together to enclose...
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Published: 01 January 2005
Fig. 2 Four-hammer radial forging machine with mechanical drive. (a) Cross section through forging box. (b) Longitudinal section through forging box. 1, eccentric shaft; 2, sliding block; 3, connecting rod; 4, adjustment housing; 5, adjusting screw; 6, hydraulic overload protection; 7, hammer More
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Published: 01 December 1998
Fig. 5 Double-frame power hammer used for open-die forging More
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Published: 01 December 1998
Fig. 18 Typical multiple-impression hammer dies for closed-die forging More
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Published: 01 December 1998
Fig. 26 Cross section of four-hammer radial forging machine with mechanical drive. (a) Eccentric shaft. (b) Sliding block. (c) Connecting rod. (d) Adjustment housing. (e) Adjusting screw. (f) Hydraulic overload protection. (g) Hammer adjustment drive shafts More
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Published: 01 January 1987
Fig. 205 Fatigue-fracture surface of the shaft of a forging hammer of AISI 1144 steel containing 0.45% C, 1.60% Mn, and 0.28% S. The fatigue crack began at a heavily abraded surface area (out of view to the left), penetrated to the center of the shaft, then turned 90° and propagated More
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Published: 01 January 2005
Fig. 31 Aluminum alloy adaptor hook forgings. (a) Hammer or press forging of original design. (b) Precision no-draft press forging of revised design, produced in a segmented die. See Example 9. Dimensions in figure given in inches Item Revised forging Material Aluminum alloy 7075 More
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Published: 01 January 2002
Fig. 37 Failure caused by a forging lap in a sledge-hammer head. (a) Cracks on the striking face soon after the hammer was first used. (b) A hot alkaline chromate etch revealed oxygen enrichment (white region) adjacent to the crack. 65× More
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Published: 01 January 2005
Fig. 21 Main input gear transmission shaft, shown as (a) and (b) a conventional hammer forging, (c) a conventional upset forging, and (d) a press-contoured, low-draft forging. Machined contours of the shaft are shown in phantom on the sectional views. Dimensions given in inches More
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Published: 01 December 2004
Mises strain (ε vM ) ≈ 0.2 to 0.3, in a hammer forging, with a displacement rate 24–30 m/s and starting temperature of 1144 K. (c) Histograms showing the distribution of misorientation angles across the dislocation boundaries (GNBs) in the forging of (b) as measured in the TEM. More
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Published: 01 January 2005
Fig. 14 Irregularly shaped hand-tool component that was upset and pierced from a hammer-forged blank in the tooling setup shown. Dimensions given in inches More
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003183
EISBN: 978-1-62708-199-3
... Abstract Forging machines use a wide variety of hammers, presses, and dies to produce products with the desired shape, size, and geometry. This article discusses the major types of hammers (gravity-drop, power-drop, high speed, and open-die forging), and presses (mechanical, hydraulic, screw...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003994
EISBN: 978-1-62708-185-6
...; they are not normally forged before extruding, except at extremely high temperatures. A minimum extrusion ratio for adequate forgeability is 4 to 1. Molybdenum is frequently hammer forged if at all possible, because its high thermal conductivity and low specific heat render it susceptible to die chill. Hammer...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006493
EISBN: 978-1-62708-207-5
... such as workpiece and die temperature, strain rate, and deformation mode. The article describes the relative forgeability of the ten most widely used aluminum alloys, and reviews common forging equipment, including hammers, mechanical and screw presses, and hydraulic presses. It also discusses postforge operations...
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Published: 01 December 1998
Fig. 17 Production of six blocker-type forgings with loose tooling in hammers. Dimensions are in inches. More
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003975
EISBN: 978-1-62708-185-6
... Abstract This article addresses dies and die materials used for hot forging in vertical presses, hammers, and horizontal forging machines (upsetters). It reviews the properties of die materials for hot forging, including good hardenability, resistance to wear, plastic deformation, thermal...