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Book Chapter
Rotary Forging
Available to PurchaseSeries: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003990
EISBN: 978-1-62708-185-6
..., dies, advantages, and limitations of radial forging. It concludes with a discussion on the applications of radial forging. cold-forming radial forging rotary forging tubular components ROTARY FORGING, or orbital forging, is a two-die forging process that deforms only a small portion...
Abstract
Radial forging is a hot- or cold-forming process that uses two or more radially moving anvils or dies to produce solid or tubular components with constant or varying cross sections along their lengths. This article focuses on the workpiece configuration, workpiece materials, machines, dies, advantages, and limitations of radial forging. It concludes with a discussion on the applications of radial forging.
Image
Differences between rotary and radial forging. (a) In rotary forging, the u...
Available to PurchasePublished: 01 December 1998
Fig. 27 Differences between rotary and radial forging. (a) In rotary forging, the upper die, tilted with respect to the lower die, rotates around the workpiece. The tilt angle and shape of the upper die result in only a small area of contact (footprint) between the workpiece and the upper die
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Image
Differences between rotary and radial forging. (a) In rotary forging, the u...
Available to PurchasePublished: 01 January 2005
Fig. 1 Differences between rotary and radial forging. (a) In rotary forging, the upper die, tilted with respect to the lower die, rotates around the workpiece. The tilt angle and shape of the upper die result in only a small area of contact (footprint) between the workpiece and the upper die
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Image
Examples of die motion in rotary forging. (a) Upper die has both translatio...
Available to PurchasePublished: 01 January 2005
Fig. 3 Examples of die motion in rotary forging. (a) Upper die has both translational and rotational motion, while lower die rotates. (b) Upper die has translational, rotational, and orbital (rocking) motion; lower die is stationary. (c) Upper die has orbital (rocking) motion only; lower die
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Image
Schematic of rotary forging setup for the forming of a copper alloy seal fi...
Available to PurchasePublished: 01 January 2005
Fig. 6 Schematic of rotary forging setup for the forming of a copper alloy seal fitting used in high-pressure piping
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Image
(a) Rotary-forged aluminum alloy 6061 bearing retainer used in bicycle hubs...
Available to PurchasePublished: 01 January 2005
Fig. 4 (a) Rotary-forged aluminum alloy 6061 bearing retainer used in bicycle hubs. (b) Schematics of the rotary forge used to produce the bearing retainer and the workpiece deformation process (left)
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Book Chapter
Forging Machinery, Dies, and Processes
Available to PurchaseSeries: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003183
EISBN: 978-1-62708-199-3
... on computer-aided design in the forging industry. Additionally, the article reviews specific characteristics, process limitations, advantages, and disadvantages of the most common forging processes, namely hot upset forging, roll forging, radial forging, rotary forging, isothermal and hot-die forging...
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-type, and multiple-ram). It further discusses the technologies used in the design of dies, terminology, and materials selection for dies for the most common hot-forging processes, particularly those using vertical presses, hammers, and horizontal forging machines. A brief section is included on computer-aided design in the forging industry. Additionally, the article reviews specific characteristics, process limitations, advantages, and disadvantages of the most common forging processes, namely hot upset forging, roll forging, radial forging, rotary forging, isothermal and hot-die forging, precision forging, and cold forging.
Image
Comparison of (a) conventionally forged and (b) rotary hot forged carbon st...
Available to PurchasePublished: 01 January 2005
Fig. 5 Comparison of (a) conventionally forged and (b) rotary hot forged carbon steel clutch hubs. Billet weight: 0.63 kg (1.39 lb) for conventional forging, 0.44 kg (0.97 lb) for rotary forging
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Image
Ti-6Al-4V round bars manufactured by cold isostatic pressing/sintering/rota...
Available to PurchasePublished: 30 September 2015
Fig. 6 Ti-6Al-4V round bars manufactured by cold isostatic pressing/sintering/rotary forging from TiH 2 powder
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Book Chapter
Material Handling Equipment for Induction Heating Systems
Available to PurchaseSeries: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005849
EISBN: 978-1-62708-167-2
.... The different types of infeed billet handling systems are: Bin tippers Elevator feeders Rotary feeders Vibratory bowl feeders Magazine loaders Rod feeders Bin Tippers In all forge shops, bins are filled with precut billets ready to be run in an induction heating system. The first...
Abstract
The handling of billets or bars is an essential part of an induction heating system. This article describes two types of handling systems available for bar heating lines: inclined ramps with escapement, and sling feeder with inclined ramp and escapement. It focuses on the various infeed billet handling systems such as bin tippers, elevator feeders, rotary feeders, vibratory bowl feeders, magazine loaders, and rod feeders. The article provides information on the main categories of billet feeding systems, namely, dual pinch roll drive assemblies, tractor drive assemblies, billet pusher systems, walking beam assemblies, and index/continuous conveyor systems. It also discussed the hot billet handling systems used to deliver heated billets to the forging cell. These methods include billet extractor conveyors, accept/reject systems with pyrometer measurements, extractor rolls, discharge chutes, pinch roll extractors, pick-n-place systems, and robots.
Image
Three types of rotary-cut broaching tools designed to penetrate rough skins...
Available to PurchasePublished: 01 January 1989
Fig. 17 Three types of rotary-cut broaching tools designed to penetrate rough skins, as on castings and forgings, without exceeding the power ratings of a broaching machine. (a) Hexagonal rotary cut. (b) Radial rotary cut. (c) Spline rotary cut
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Book Chapter
Forging of Refractory Metals
Available to PurchaseSeries: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003994
EISBN: 978-1-62708-185-6
... forging minimizes the contact time between workpiece and die and can also maintain the forging temperature through adiabatic heating. Rotary forging machines using computer-controlled reduction schedules can maintain nearly isothermal conditions during a reduction pass along the length of the workpiece...
Abstract
This article focuses on the forging characteristics of different types of refractory metals and alloys, namely, niobium and niobium alloys, molybdenum and molybdenum alloys, tantalum and tantalum alloys, and tungsten and tungsten alloys.
Book Chapter
Production of Titanium Powders
Available to PurchaseBook: Powder Metallurgy
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006078
EISBN: 978-1-62708-175-7
... ( Fig. 6 ) were manufactured by cold isostatic pressing/sintering/rotary forging from TiH 2 powder. The chemical composition of these Ti-6Al-4V bars meets the requirements of ASTM International and Aerospace Material Specification (AMS) standards ( Table 4 ). The mechanical properties of these PM Ti...
Abstract
This article provides a summary of the conventional technologies used for titanium powder production. It focuses on the various processes for titanium powder production, namely, Hunter, Kroll, Armstrong, MER, TIRO, FFC-Cambridge, Chinuka, and CSIR processes. Employment of titanium powder significantly improves the synthesis of titanium and its alloys.
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 trimming, forming, repairing, cleaning, and heat treatment. aluminum alloys closed-die forging forgeability forging equipment open-die forging roll forging rotary forging FORGING was among the earliest fabricating techniques applied to aluminum. The development of metal airplanes...
Abstract
This article examines aluminum forging processes, including open-die, closed-die, upset, roll, orbital, spin, and mandrel forging, and compares and contrasts their capabilities and the associated design requirements for forged parts. It discusses the effect of key process variables 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 such as trimming, forming, repairing, cleaning, and heat treatment.
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
... Orbital (rotary) forging 150–260 300–500 Spin forging 150–315 200–600 Roll forging 95–205 200–400 Hydraulic presses 315–430 600–800 Forging Methods Aluminum alloys are produced by all of the current forging methods available, including open-die (or hand) forging, closed-die...
Abstract
This article begins with discussion on forgeability and the factors affecting the forgeability of aluminum and aluminum alloys. It describes the types of forging methods and equipment and reviews critical elements in the overall aluminum forging process: die materials, die design, and die manufacture. The article discusses the critical aspects of various manufacturing elements of aluminum alloy forging, including the preparation of the forging stock, preheating stock, die heating, lubrication, trimming, forming and repair, cleaning, heat treatment, and inspection. It concludes with a discussion on the forging of advanced aluminum materials and aluminum alloy precision forgings.
Book Chapter
Practical Aspects of Converting Ingot to Billet
Available to PurchaseSeries: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003989
EISBN: 978-1-62708-185-6
... on a forge with four dies, known as a rotary forge. Cogging continues to be applicable for converting ingot structure to billet structure in a wide variety of processes, and its scope continues to increase, as is indicated by its incorporation into the recent production of powder-based billets. Two...
Abstract
This article describes the presses, transportation equipment, and manufacturing processes associated with cogging. It discusses the practical and metallurgical issues encountered during the conversion of ingot to billet. The article explains the use of numerical modeling as part of the continuing efforts to reduce the cost and time associated with developing new cogging sequences, increase the yield, make the processes more robust, and increase the quality of the produced product.
Book Chapter
Glossary: Bulk Forming
Available to PurchaseSeries: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004031
EISBN: 978-1-62708-185-6
... Abstract This article is a comprehensive collection of terms related to metalworking operations that produce shapes from forging, extrusion, drawing, and rolling operations. drawing extrusion forging rolling ASM Handbook, Volume 14A: Metalworking: Bulk Forming Copyright © 2005 ASM...
Abstract
This article is a comprehensive collection of terms related to metalworking operations that produce shapes from forging, extrusion, drawing, and rolling operations.
Book
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
Book Chapter
Roll Forming of Axially Symmetric Components
Available to PurchaseSeries: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004010
EISBN: 978-1-62708-185-6
... wheels with good precision and control ( Ref 6 , Ref 7 , Ref 8 , Ref 9 , Ref 10 ). These rotary-forging techniques require a die to define the final shape, and they use the local-contact mode of shaping to reduce the required press loads. Shaping of parts by roll forming with opposed rolls...
Abstract
This article describes the roll forming of components of nickel, titanium, and aluminum alloys. The metallurgical characteristics of the roll formed components, such as macrostructures, microstructures, tensile strength, and stress rupture performance, are discussed. The article compares the resulting properties of roll formed and conventionally forged components.
Book Chapter
Process Monitoring and Control of Rotary Friction Welding
Available to PurchaseSeries: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005578
EISBN: 978-1-62708-174-0
... with an increase in axial pressure (known as forge force) to forge the parts together. Inertia friction welding (IFW) is a rotary friction welding process that employs a finite amount of stored energy in the form of a rotating flywheel. Figure 2 illustrates the process parameter relationships during...
Abstract
This article lists the system parameters of the friction welding process and describes the four categories of monitoring and control of the manufacturing process. It discusses the monitoring methods of a rotary friction welded sample, for determining in-process quality of ferrous alloys, and dissimilar metals using acoustic emission. The article reviews the feasibility of detecting the presence of ferrite during microstructural evolution of friction welding of three austenitic stainless steels: 310, 304, and 255. It also explains the in-process quality control of friction welding.
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