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Hammers

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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. 1 Principles of various types of gravity-drop hammers More
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Published: 01 January 2005
Fig. 4 Principles of operation of two types of counter-blow hammers More
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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
Book Chapter

Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005128
EISBN: 978-1-62708-186-3
... Abstract This article discusses the advantages and limitations of drop hammer forming and presents the key factors for determining a process plan. It describes the characteristics of hammers and presents information on tool materials. It explains the use of lubricants and preparation of blanks...
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Published: 01 December 1998
Fig. 43 Air-actuated power drop hammer equipped for drop hammer forming More
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Published: 01 January 2006
Fig. 20 Drop hammer forming showing oven next to the drop hammer More
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Published: 01 January 2006
Fig. 2 Schematic of an air-actuated power-drop hammer equipped for drop hammer forming More
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Published: 30 November 2018
Fig. 3 Swing-hammer shredder, also called a hammer mill. Source: Ref 4 . Reprinted with permission from Metso Corporation 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...
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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 1987
Fig. 770 A “hammer-burst” fracture at the center of a 130-mm (5 1 8 -in.) diam, 38-mm (1 1 2 -in.) thick forged disk of AISI T1 tool steel. This longitudinal fracture shows a surface of either a lap or a cold shut; the appearance of such a fracture is often called “platy More
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Published: 30 September 2015
Fig. 18 Stone hammer blow testing machine. Courtesy of Erichsen GmbH & Co. KG. Source: Ref 8 More
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Published: 30 September 2015
Fig. 22 Particles (+8 mesh) of copper powder hammer milled from oxide-reduced sinter cake. Courtesy of SCM Metal Products 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. 13(a) AISI S5 tool steel hammer head that cracked during heat treatment. The fracture was caused by quench cracking that was promoted by the decarburized surface ( Fig. 13(b) ) and deep stamp mark (arrows). Actual size More
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Published: 01 January 2002
Fig. 13(b) Macroetched disk cut from the head of the sledge hammer shown in Fig. 13(a) . The heavily decarburized surface is revealed by macroetching. Actual size 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 2002
Fig. 10 Fracture surface of a piece of glass broken by striking it with a hammer. Origin is at the lower left; the wavelike lines are Wallner lines. Optical microscope; reflected light; picture width ∼3 mm. Source: Ref 3 More