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precision hot forging

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Published: 01 February 2005
Fig. 22.30 Hot precision forging die [ Bobke, 1991 ] More
Image
Published: 01 February 2005
Fig. 22.33 FEM model of hot precision forging process [ Dahl et al., 1999 ] More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250129
EISBN: 978-1-62708-345-4
... approach is applicable to precision hot forging of spiral bevel, spur, and helical gears in conventional presses in that it allows the die designer to examine the effects of various process variables (loads, stresses, and temperature) on the die design. Precision hot-forged gears have the same...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2013
DOI: 10.31399/asm.tb.mfub.t53740103
EISBN: 978-1-62708-308-9
..., including open-die and closed-die forging, hot upset and roll forging, high-energy-rate forging, ring rolling, rotary swaging, radial and orbital forging, isothermal and hot-die forging, precision forging, and cold forging. The chapter also includes information on cold and hot extrusion and drawing...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120033
EISBN: 978-1-62708-269-3
... Abstract This chapter provides practical information on the forming and forging processes used to manufacture titanium parts, including die forging, precision die forging, hot and cold forming, superplastic forming, and deep drawing. It explains how process variables such as temperature...
Image
Published: 01 November 2013
Fig. 13 Closed-die forging without flash. Source: Ref 9 Definition In this process, a billet with carefully controlled volume is deformed (hot or cold) by a punch in order to fill a die cavity without any loss of material. The punch and the die may be made of one or several pieces More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040295
EISBN: 978-1-62708-300-3
... in hot and cold forging, respectively. Fig. 22.1 Typical failure modes and locations in precision-forging die [ Schey, 1983 ] 22.3 Fracture Mechanisms In order to maximize die life, it is important to understand the primary mechanisms of fatigue fracture, summarized as follows...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040141
EISBN: 978-1-62708-300-3
... in hot forged tubes are about 0.004 in. ( 0.1 mm) on the inside diameter (ID). In cold forging the outside diameter (OD) and ID tol- erances are about 0.004 ( 0.1 mm) and 0.001 in. (0.025 mm), respectively [Walter, 1965]. There are two types of radial precision forging machines: vertical and horizontal...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040319
EISBN: 978-1-62708-300-3
... shape forged components. FE, finite element [ Meidert et al., 2000 ] 23.2 Tolerances in Precision Forging To reduce cost, it is often desirable to replace conventional forging that requires several subsequent machining and finishing operations with precision forging, i.e., cold and warm...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040193
EISBN: 978-1-62708-300-3
... 6, “Temperatures and Heat Transfer.” Friction factors measured with the ring compression test, however, are not valid for precision forging processes (hot, warm, and cold) where the interface pressure is very high and the surface generation is large. The friction conditions change during...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480225
EISBN: 978-1-62708-318-8
... a given shape, or the production of a more refined shape using the same energy. Precision forgings requiring no machining other than hole drilling, for example, are produced using this approach. Hot die forging is typically performed in air and is used primarily to produce small airframe structural shapes...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040257
EISBN: 978-1-62708-300-3
... Abstract This chapter discusses the processes of isothermal and hot-die forging and their use in producing aerospace components. It explains how isothermal forging was developed to provide a near-net shape component geometry and well-controlled microstructures and properties with accurate...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040007
EISBN: 978-1-62708-300-3
... forging, precision forging, cold and warm forging, P/M forging. Application. Precision forgings, hollow forg- ings, fittings, elbows, tees, etc. 2.3.3 Electro-Upsetting (Fig. 2.4) Definition. Electro-upsetting is the hot forg- ing process of gathering a large amount of ma- terial at one end of a round bar...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040237
EISBN: 978-1-62708-300-3
... common way to determine the shear friction factor in forging is to perform ring compression tests. Friction factors measured with the ring compression test, however, are not valid for precision cold forging processes (hot, warm, and cold) where the interface pressure is very high and the surface...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.9781627083003
EISBN: 978-1-62708-300-3
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
... hot. Secondary processes, which are used to produce the final product shape, are conducted either hot or cold. The chapter discusses the primary objectives, principal types, advantages, and disadvantages of both primary and secondary metalworking processes. They are rolling, forging, extrusion, sheet...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040107
EISBN: 978-1-62708-300-3
..., depending on the number of forgings to be produced, dimensional precision, and the alloy being forged. The introduction of a new process invariably depends on the cost effectiveness and production rate of the machine associated with that process. Therefore, capabilities of the machine associated...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130133
EISBN: 978-1-62708-284-6
... cold forging or hot forging in terms of preforge factors and/or discontinuities generated by the forging process. Supporting topics that are discussed in the case studies include validity checks for buster and blocker design, lubrication and wear, mechanical surface phenomenon, forging process design...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280091
EISBN: 978-1-62708-267-9
.... Cleaner, less-segregated heats of the most precise chemistry are always desired. The less-segregated heats are less susceptible to hot cracking during forging. Hot cracking can be a critical problem in alloys such as U-500, Rene 41, and Astroloy because of their narrow hot-working temperature ranges...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480207
EISBN: 978-1-62708-318-8
... substantial amounts of cold rolling after hot rolling to intermediate size. Radial Precision Forging Machines Starting material for bar depends on the size of the machine available. Currently, the largest unit used on titanium can accept input material up to 610 mm (24 in.) in diameter ( Fig. 9.8...