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capacitor discharge welding
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Book Chapter
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005554
EISBN: 978-1-62708-174-0
... Abstract This article focuses on the advantages, disadvantages, and applications of capacitor discharge (CD) stud welding as well as equipment used. It describes three modes of CD stud welding: initial-gap, initial-contact, and drawn-arc welding. The article also discusses the responsibilities...
Abstract
This article focuses on the advantages, disadvantages, and applications of capacitor discharge (CD) stud welding as well as equipment used. It describes three modes of CD stud welding: initial-gap, initial-contact, and drawn-arc welding. The article also discusses the responsibilities of the welding operator.
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001361
EISBN: 978-1-62708-173-3
... Abstract Capacitor discharge (CD) stud welding is a stud arc welding process in which the tip of the stud melts almost instantly when energy stored in capacitors is discharged through it. This article describes the three basic modes of the CD stud welding: initial-gap welding, initial-contact...
Abstract
Capacitor discharge (CD) stud welding is a stud arc welding process in which the tip of the stud melts almost instantly when energy stored in capacitors is discharged through it. This article describes the three basic modes of the CD stud welding: initial-gap welding, initial-contact welding, and drawn-arc welding. It discusses the advantages and disadvantages and applications of the CD stud welding. The article describes the equipment used and the personnel responsibilities during CD stud welding.
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Published: 31 October 2011
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Published: 31 October 2011
Fig. 3 Initial-contact capacitor discharge stud welding. See text for explanation. Source: Ref 1
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Published: 31 October 2011
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in Procedure Development and Practice Considerations for Resistance Welding[1]
> Welding, Brazing, and Soldering
Published: 01 January 1993
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001421
EISBN: 978-1-62708-173-3
..., friction welding, transient liquid phase bonding, and capacitor discharge welding. aluminum metal-matrix composites capacitor discharge welding chemical reactions electron-beam welding friction welding gas-metal arc welding gas-tungsten arc welding laser-beam welding material selection...
Abstract
The effective integration of aluminum metal-matrix composites (Al-MMCs) into useful structures and devices often requires an understanding of the weldability of Al-MMCs that includes a thorough knowledge on the effects of various interactions between matrix and reinforcement. This article provides a detailed discussion on weldability and the effect of viscosity, chemical reactions, and solidification on weldability. It discusses different welding processes, namely, gas-tungsten arc welding, gas-metal arc welding, laser-beam welding, electron-beam welding, resistance welding, friction welding, transient liquid phase bonding, and capacitor discharge welding.
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in Selection and Weldability of Dispersion-Strengthened Aluminum Alloys
> Welding, Brazing, and Soldering
Published: 01 January 1993
Fig. 2 A TEM microstructure traverse across a moderately cooled capacitor-discharge weld in Al-8Fe-4Ce alloy. Source: Ref 10
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Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001443
EISBN: 978-1-62708-173-3
... on flash welding, high-frequency resistance welding, and capacitor discharge stud welding. It concludes with a discussion on resistance welding of stainless steels, aluminum alloys, and copper and copper alloys. aluminum alloys capacitor discharge stud welding clamping dies copper copper alloys...
Abstract
Resistance welding (RW) encompasses a group of processes in which the heat for welding is generated by the resistance to the flow of electrical current through the parts being joined. The three major resistance welding processes are resistance spot welding (RSW), resistance seam welding (RSEW), and projection welding (PW). This article addresses the considerations for using these processes to join specific types of materials. It discusses the process variations, applicability, advantages, and limitations of these resistance welding processes. The article provides information on flash welding, high-frequency resistance welding, and capacitor discharge stud welding. It concludes with a discussion on resistance welding of stainless steels, aluminum alloys, and copper and copper alloys.
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001419
EISBN: 978-1-62708-173-3
... such as capacitor-discharge welding, electron-beam welding, and laser welding. In fact, considering the effects of laser wavelength on the weldability of aluminum alloys, the application of the pulsed Nd:YAG laser welding process is preferred because this process provides 1.06 μm wavelength radiation, which is more...
Abstract
Conventional high-strength aluminum alloys produced via powder metallurgy (P/M) technologies, namely, rapid solidification (RS) and mechanical alloying (mechanical attrition) have high strength at room temperature and elevated temperature. This article focuses on the metallurgy and weldability of dispersion-strengthened aluminum alloys based on the aluminum-iron system that are produced using various RS-P/M processing techniques. It describes weldability issues related to weld solidification behavior, the formation of hydrogen-induced porosity in the weld zone, and the high-temperature deformation behavior of these alloys, which affect the selection and application of fusion and solid-state welding processes. The article provides specific examples of material responses to welding conditions and highlights the microstructural development in the weld zone.
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006515
EISBN: 978-1-62708-207-5
... ALUMINUM AND ITS ALLOYS can be welded by several methods. The primary methods used are the gas-shielded arc welding processes, mainly gas tungsten arc welding (GTAW) and gas metal arc welding (GMAW). Other arc welding processes include arc stud welding, plasma arc welding, and shielded metal arc...
Book Chapter
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003208
EISBN: 978-1-62708-199-3
... as stud arc welding and capacitor-discharge stud welding. Both methods involve direct current and arcing. For stud arc welding, a motor-generator, a transformer-rectifier, or a storage battery provides the power supply. The power supply for capacitor-discharge stud welding is a low-voltage electrostatic...
Abstract
This article discusses the principles of operation, equipment needed, applications, and advantages and disadvantages of various fusion welding processes, namely, oxyfuel gas welding, electron beam welding, stud welding, laser beam welding, percussion welding, high-frequency welding, and thermite welding.
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005595
EISBN: 978-1-62708-174-0
... pressure to obtain a weld between the metals. In this process, the sudden discharge of a capacitor bank through a coil of relatively few turns produces a strong transient magnetic field. If this field is coupled with a metal workpiece, an intense impulsive force acts on the material and accelerates...
Abstract
This article describes the fundamental theory of magnetic pulse welding (MPW). It reviews the equipment used for MPW, namely, work coil, capacitor bank, high-voltage power supply, high-voltage switches, and field shapers. The article discusses the MPW process and explains the critical parameters needed to obtain acceptable welds. Applications and safety guidelines of the MPW are also presented.
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Published: 30 November 2018
Fig. 22 Sequence of operations required to weld a stud to a workpiece using the initial gap method of capacitor discharge stud welding
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in Procedure Development and Practice Considerations for Resistance Welding[1]
> Welding, Brazing, and Soldering
Published: 01 January 1993
Fig. 25 Sequence of operations required to weld a stud to a workpiece using the initial gap method of capacitor discharge stud welding
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Image
Published: 31 October 2011
Fig. 1 Typical current-versus-time curves for the three capacitor discharge stud welding methods. Source: Ref 1
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Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005593
EISBN: 978-1-62708-174-0
... is shown in Fig. 6 . For operation, the switch on the left is used to charge the capacitor, while the switch on the right discharges the capacitor energy into the welding circuit. Characteristic values for the circuit include the capacitor charge voltage (V c ), the system capacitance (C),the turns ratio...
Abstract
This article provides a fundamentals-based description of solid-state resistance projection welding. It details simple analytical tools to understand the variety of mechanisms that occur during resistance projection welding. Factors relating to the quality of solid projection are discussed, in addition to an explanation of the mechanisms of bonding for solid projection welding. The article reviews how these mechanisms are affected by heat balance, current profile, and mechanical characteristics of the welding equipment. It also presents the design of projection welding mechanical systems.
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005127
EISBN: 978-1-62708-186-3
... generated by a capacitor bank discharge, I max , can be estimated from standard LRC equations for the primary circuit. As long as the circuit resistance is low, this can be estimated as: (Eq 5) I max = V ° C L where V o is the voltage the capacitor bank is initially charged...
Abstract
This article emphasizes the traits that are common to high-velocity forming operations. It describes general principles on how metal forming is accomplished and analyzed when inertial forces are large. The article discusses the principal methods of high-velocity forming, such as explosive forming, electrohydraulic forming, and electromagnetic forming. It provides examples that illustrate how these methods can be practically applied. The article concludes with information on the status and development potential for the technology.
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001370
EISBN: 978-1-62708-173-3
... personnel safety. Electrical Hazards All lasers used for welding employ high voltages capable of inflicting lethal electric shocks. Therefore, maintenance should be performed by personnel familiar with high-voltage safety procedures. Power supplies for high-power lasers contain capacitors capable...
Abstract
Laser-beam welding (LBW) uses a moving high-density coherent optical energy source, called laser, as the source of heat. This article discusses the advantages and limitations of LBW and tabulates energy consumption and efficiency of LBW relative to other selected welding processes. It provides information on the applications of microwelding with pulsed solid-state lasers. The article describes the modes of laser welding such as conduction-mode welding and deep-penetration-mode welding, as well as major independent process variables for laser welding, such as laser-beam power, laser-beam diameter, absorptivity, and traverse speed. It concludes with information on various hazards associated with LBW, including electrical hazards, eye hazards, and chemical hazards.
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005641
EISBN: 978-1-62708-174-0
... Abstract This article provides an overview of the fundamentals, mechanisms, process physics, advantages, and limitations of laser beam welding. It describes the independent and dependent process variables in view of their role in procedure development and process selection. The article includes...
Abstract
This article provides an overview of the fundamentals, mechanisms, process physics, advantages, and limitations of laser beam welding. It describes the independent and dependent process variables in view of their role in procedure development and process selection. The article includes information on independent process variables such as incident laser beam power and diameter, laser beam spatial distribution, traverse speed, shielding gas, depth of focus and focal position, weld design, and gap size. Dependent variables, including depth of penetration, microstructure and mechanical properties of laser-welded joints, and weld pool geometry, are discussed. The article also reviews the various injuries and electrical and chemical hazards associated with laser beam welding.
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