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high-frequency induction welds

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Published: 31 October 2011
Fig. 2 Schematic of high-frequency induction welding apparatus for joining a tube seam More
Image
Published: 01 December 1998
Fig. 3 Joining a tube seam by high-frequency induction welding More
Image
Published: 01 January 1993
Fig. 1 Joining a tube seam by high-frequency induction welding More
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003509
EISBN: 978-1-62708-180-1
... welding processes. The article also describes failure origins in other welding processes, such as electroslag welds, electrogas welds, flash welds, upset butt welds, flash welds, electron and laser beam weld, and high-frequency induction welds. arc welding brittle fracture electrogas welds...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001368
EISBN: 978-1-62708-173-3
... currents, that is, the generation of an edge “V.” High-frequency currents can be supplied to the welding process or workpiece by using either an induction coil (known as high-frequency induction welding, HFIW) or electrical contacts (known as high-frequency resistance welding, HFRW). The edge “V...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005583
EISBN: 978-1-62708-174-0
... joints were made with 10 kHz motor-generator power sources equipped with induction coils that could be opened for removal from the pipe or tube after the weld was formed. A municipal utility was the first to use mobile high-frequency welding equipment in the streets of New York City for the welding...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005834
EISBN: 978-1-62708-167-2
... Welding, Brazing, and Soldering High-frequency induction welding offers substantial energy savings because heat is localized at the weld joint. The most common application of induction welding is welded tube or pipe products that lend themselves to high-speed, high-production automated processing...
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005129
EISBN: 978-1-62708-186-3
... Capabilities of blank-welding methods Capability Process Resistance mash-seam welding Laser welding High-frequency induction welding Electron-beam welding Straight-line capabilities 50 mm (2 in.) minimum and 2500 mm (100 in.) maximum weld length in a straight line only About 3800 mm (150...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003208
EISBN: 978-1-62708-199-3
... separate high-frequency welding processes can be identified: high-frequency resistance welding (HFRW) and high-frequency induction welding (HFIW), sometimes referred to as induction resistance welding. In HFRW, heating current enters the work through electrical contacts on the surface. In HFIW, heating...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005846
EISBN: 978-1-62708-167-2
... through a final set of rollers that close the profile of the tube and welding occurs. Induction welding systems for steel tubing operate at high frequencies (100−500 kHz) and high power (in the range of 100 kW to a few MWs). Figure 21 shows a schematic of current flow in the tube in a typical...
Image
Published: 30 November 2018
Fig. 12 Longitudinal butt seam welding a tube by (a) high-frequency resistance heating and (b) high-frequency induction heating More
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005891
EISBN: 978-1-62708-167-2
... frequency is one of the most critical parameters of induction heating systems. If frequency is too low, an eddy current cancellation within the heated body takes place, resulting in poor electrical efficiency of the coil. On the other hand, when the frequency is too high, the skin effect will be highly...
Book Chapter

By J.F. Libsch
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001387
EISBN: 978-1-62708-173-3
.... , Basics of Induction Heating , Vol 1 4. Gerbosi P.F. and Libsch J.F. , Controlled-Atmosphere Brazing With Induction Heating , Weld. J. , Oct 1989 , p 32 – 37 5. Libsch J.F. and Capolongo P. , High Frequency Induction Brazing and Soldering , Lepel Rev. , Vol 1...
Image
Published: 09 June 2014
Fig. 21 Schematic of a continuous high-frequency induction longitudinal seam tube-welding system. Source: Ref 13 More
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...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005559
EISBN: 978-1-62708-174-0
.... These systems are based on ac weld controls, with the direct current brought about by rectification at the secondary of the welding transformer. The output current from this approach provided a direct current with a large “ac ripple,” as also shown in Fig. 4 . Welders with high secondary inductance provide...
Image
Published: 01 January 2006
Fig. 10 Two methods of high-frequency welding of longitudinal seams in tubing. (a) Sliding contacts introduce current to the tube edges. (b) Multiturn induction coil induces current to the tube edges. More
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001469
EISBN: 978-1-62708-173-3
... ). Induction Welding In this joining method, a layer of electromagnetic material in the form of a tape or a thin sheet is placed at the joint interface. This insert material is heated using a high-frequency (2 to 10 MHz) inductive supply ( Ref 43 , 44 ). The electromagnetic tapes contain conductive...
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
.... The capacitor bank is initially charged with a direct current power supply. To generate the forces required for welding, the charged capacitor bank is discharged through a coil, generating a high-frequency current with a damped sinusoidal profile. The current produces a transient magnetic field that interacts...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003200
EISBN: 978-1-62708-199-3
...-frequency induction equipment is through heating or very deep heat treating. Medium-Frequency Motor-Generator Units Medium-frequency motor-generator units consist of a high-frequency generator driven by a motor. Induction motors, which may be mounted integrally with the generator or separately...