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Search Results for seaming
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Image
Published: 30 November 2018
Fig. 11 (a) Examples of sheet metal joints created by seaming (hemming). (b) Examples of cupped or tubular parts with seamed joints
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Image
Published: 01 January 2005
Fig. 5 Four degrees of susceptibility to seaming during thread rolling. (a) Negative susceptibility to form seams. Metal flow adjacent to the die surface is slower than in the middle of the roll form. This is characteristic of metals having a relatively high coefficient of friction
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Image
Published: 01 January 1989
Fig. 5 Four degrees of susceptibility to seaming during thread rolling. (A) Negative susceptibility to form seams. Metal flow adjacent to the die surface is slower than in the middle of the roll form. This is characteristic of metals having a relatively high coefficient of friction
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Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005608
EISBN: 978-1-62708-174-0
... Abstract This article describes the process applications, advantages, and limitations of resistance seam welding. The fundamentals of lap seam welding are also reviewed. The article details the types of seam welds, namely, lap seam welds and mash seam welds, and the processing equipment used...
Abstract
This article describes the process applications, advantages, and limitations of resistance seam welding. The fundamentals of lap seam welding are also reviewed. The article details the types of seam welds, namely, lap seam welds and mash seam welds, and the processing equipment used for lap seam welding. The primary factors used to determine the selection of electrodes, including alloy type and wheel configuration, are reviewed. The article also describes weld quality and process control procedures.
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001365
EISBN: 978-1-62708-173-3
... Abstract Resistance seam welding (RSEW) is a process in which the heat generated by resistance to the flow of electric current in the work metal is combined with pressure to produce a welded seam. This article discusses the various classes of the RSEW process, namely roll spot welding...
Abstract
Resistance seam welding (RSEW) is a process in which the heat generated by resistance to the flow of electric current in the work metal is combined with pressure to produce a welded seam. This article discusses the various classes of the RSEW process, namely roll spot welding, reinforced roll spot welding, and leak-tight seam welding. It provides information on the applications of lap seam weld, mash seam weld, and butt seam weld. The article reviews the advantages and limitations of seam welding compared to resistance spot welding, projection welding, and laser welding. It describes the four basic types of resistance seam weld machines: circular, longitudinal, universal, and portable. The article concludes with a discussion on weld quality and process control for seam welding.
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in Procedure Development and Practice Considerations for Resistance Welding[1]
> Welding, Brazing, and Soldering
Published: 01 January 1993
Fig. 11 Process variations of seam welding. (a) Lap seam welding. (b) Mash seam welding. (c) Metal finish seam welding. (d) Electrode wire seam welding. (e) Foil butt seam welding
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Image
Published: 01 January 2002
Fig. 26 Seam in rolled 4130 steel bar (a) Closeup of seam. Note the linear characteristics of this flaw. (b) Micrograph showing cross section of the bar. Seam is normal to the surface and filled with oxide. 30×
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Image
Published: 01 January 2006
Fig. 17 Muffler lock seam constructions. The double-lock seam construction (right) helps prevent liquid penetration between the wraps.
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in Failures Related to Hot Forming Processes
> Analysis and Prevention of Component and Equipment Failures
Published: 30 August 2021
Fig. 9 Seam in rolled 4130 steel bar. (a) Closeup of seam. Note the linear characteristics of this flaw. (b) Micrograph showing cross section of the bar. Seam is normal to the surface and filled with oxide. Original magnification: 30×
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Published: 15 January 2021
Fig. 36 (a) Surface of Ti-6Al-4V bar with seams. (b) Section through seams showing oxide and blunt tips. Kroll’s etch
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Published: 31 October 2011
Fig. 2 (a) Lap seam weld, (b) mash seam weld with flat electrodes, and (c) mash seam weld with radiused (contoured) electrodes. Flat electrodes in mash seam welding should not be used when sheet thickness is less than 1mm (0.040 in.). Radiused electrodes can be used for sheet thicker than 1mm
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in Procedure Development and Practice Considerations for Resistance Welding
> Welding Fundamentals and Processes
Published: 31 October 2011
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005640
EISBN: 978-1-62708-174-0
... with seam welding. It concludes with a discussion on the welding equipment and other factors associated with resistance spot and seam welding. aluminum alloys copper alloys electrode force low-carbon steel resistance spot welding seam welding stainless steel surface preparation weld lobe weld...
Abstract
This article describes the significance of the three variables that affect the resistance spot welding process: welding current, electrode force, and welding time. It presents the effects of weld spacing and surface preparation on weld quality. The article elaborates the typical sequence of steps for determining the satisfactory conditions for spot welding and the mechanical aspects that affect this process. It considers the effects of process variables on the weld lobe. The article reviews surface preparation, part fit-up, electrode drives, weld parameters, and tests associated with seam welding. It concludes with a discussion on the welding equipment and other factors associated with resistance spot and seam welding.
Book Chapter
Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002142
EISBN: 978-1-62708-188-7
... Abstract This article discusses the three characteristics that are important in evaluating and selecting metals for thread rolling, namely, rollability, flaking, and seaming. It reviews the capabilities and limitations of flat-die rolling, radial-infeed rolling, tangential rolling, through-feed...
Abstract
This article discusses the three characteristics that are important in evaluating and selecting metals for thread rolling, namely, rollability, flaking, and seaming. It reviews the capabilities and limitations of flat-die rolling, radial-infeed rolling, tangential rolling, through-feed rolling, planetary thread rolling, continuous rolling, and internal thread rolling, as well as the rolling machines and dies used. The article describes the factors affecting die life and provides information on radial die load, seam formation, surface finish, and thread dimensions that are affected by the form of the thread. It explains the reasons for using fluids in thread rolling. The article concludes with a comparison of rolling with cutting and grinding.
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006514
EISBN: 978-1-62708-207-5
... Abstract The resistance welding processes commonly employed for joining aluminum are resistance spot welding, resistance seam welding, resistance roll welding, upset and flash welding for butt joining welding, and high-frequency resistance welding. This article discusses the general factors...
Abstract
The resistance welding processes commonly employed for joining aluminum are resistance spot welding, resistance seam welding, resistance roll welding, upset and flash welding for butt joining welding, and high-frequency resistance welding. This article discusses the general factors affecting resistance welding: electrical and thermal conductivities, rising temperature, plastic range, shrinkage, and surface oxide. It reviews the weldability of base materials such as Alclad alloys and aluminum metal-matrix composites. The article describes the joint design and welding procedures for resistance spot welding, as well as the joint type, equipment, and welding procedures for seam and roll spot welding. It concludes with information on flash welding, high-frequency welding, and cross-wire welding.
Image
Published: 01 January 1987
Fig. 99 Fractures in AISI 5160 wire springs that originated at seams. (a) Longitudinal fracture originating at a seam. (b) Fracture origin at a very shallow seam, the arrow indicates the base of the seam. (J.H. Maker, Associated Spring)
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Image
Published: 01 January 2002
Fig. 2 4340 steel wing-attachment bolt that cracked along a seam. (a) Bolt showing crack (arrows) along entire length. (b) Branching cracks (arrows) at head-to-shank radius. (c) Head of bolt showing cracking (arrows) about halfway through bolt-head diameter. (d) Section through bolt showing
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Image
Published: 01 January 2002
Fig. 11 Failures in wire springs. (a) Longitudinal failure originating at a seam. 45×. (b) Origin of failure at a very shallow seam. The arrow indicates the base of the seam. 115×
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in Elevated-Temperature Life Assessment for Turbine Components, Piping, and Tubing
> Failure Analysis and Prevention
Published: 01 January 2002
Fig. 32 Photograph of catastrophic fishmouth rupture of seam-welded high-energy piping. These failures are typically brittle and are not predicted using simple life fraction rule calculations.
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Image
Published: 01 January 2002
Fig. 25 Light micrographs of two cross-sectional views of a seam found on a closed-die forged pitman arm showing decarburization and internal oxidation. Etched with 2% nital
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