Resistance Nut Welding: Improving the Weldability and Joint Properties of Ultra High Strength Steels

Tolf, Erik; Hedegård, Joakim

doi:10.1007/bf03266557

Cited by 15 publications

(7 citation statements)

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“…Projection welding is used for joining fasteners such as nuts and bolts to sheet metal due to its automation, reliability and low cost. [20][21]. If the welding projection is not formed in the welding bolt or if the 3 projections on the bolt head are not at equal height, the desired tensile rupture failure load value is not achieved since the welding current will not be distributed evenly and will prevent all the projections from melting at the same time.…”

Section: Resultsmentioning

confidence: 99%

Investigation on the Effect of Projection Types on Stud Weld Strength by Taguchi Method

Kir

YAZAR²,

Talaş

2024

Politeknik Dergisi

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In this study, the effect of different weld projections on the mechanical properties of stud welds was analyzed using the Taguchi experiment planning method, using a projection welding machine with a capacity of 100 kVA with MFDC transformer. The samples were subjected to the tensile rupture force test with a destructive test device. The aim of this study was to ensure product safety by capturing the spot-welding quality, which is determined by the specifications of the automotive main industry, using a bolt with a lower weight. In this study, 1.5 mm WSS-M1A365-A11 uncoated steel sheet and 8.8 quality M6x1.00x25 triple projection uncoated welding bolts and 8.8 quality M6x1.00x18.5 ring shaped weld bolts were used as stud welding bolts. Different welding times, different welding currents and different welding clamping forces were used on the WSS-M1A365-A11 steel sheet samples in the stud welding operation with bolts. Taguchi analysis showed that ring shaped stud weld bolts required welding parameters of 32 ms welding time, 27 kA welding current and 500 daN welding force, while triple projection stud welding was found to perform the best optimum weld with 23 ms welding time, 18 kA welding current and 350 daN force.

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Section: Resultsmentioning

confidence: 99%

Investigation on the Effect of Projection Types on Stud Weld Strength by Taguchi Method

Kir

YAZAR²,

Talaş

2024

Politeknik Dergisi

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“…other equipment, fewer published papers focus on the RPW of nuts in the open literature. Tolf 6) studied the resistance projection welding of three different types of nut welds to high-and ultra-high-strength thin steel sheets with alternating and direct currents. They concluded that the strength of the joints with alternating current was superior and the acceptable current ranges of alternating current were wider compared to direct current because the alternating current build-up, which affects the heat capacity, is more rapid than that of the direct current.…”

Section: Microstructure and Failure Analysis Of Resistance Projectionmentioning

confidence: 99%

Microstructure and Failure Analysis of Resistance Projection Welding of Nuts to AHSS with Capacitor Discharge Welding

et al. 2019

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“…Many authors have dealt with projection welding [1][2][3][4][5][6][7][8]], yet only with single projection applications. The Authors [1-3][9-10] emphasize the application of modelling aimed to optimise the welding process, determine initial parameters and precisely identify phenomena taking place in the process.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Projection Welding in Relation to the Non-Parallelism of Electrodes

Mikno

2024

Preprint

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The article contains the analysis of projection welding in relation to the non-parallel location (non-parallelism) of electrodes. For a thin-walled flat element (sheet metal) with two embossed projections, the FEM calculations were conducted in relation to different angles between the electrodes. The calculation involved the use of the software SORPAS-3D. The analysis included the temperature distribution, power density, electrode displacement, volume of molten metal, nugget diameter and welding energy. The FEM results were verified experimentally by technological welding tests, destructive examination (peeling/metallographic). The experimental tests involved the application of a typical element e.g. nut with two embossed projections. The research results allow the obtainment of knowledge concerning phenomena occurring in the above-named process and unacceptable bevelling angle between electrodes.

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Resistance Nut Welding: Improving the Weldability and Joint Properties of Ultra High Strength Steels

Cited by 15 publications

References 0 publications

Investigation on the Effect of Projection Types on Stud Weld Strength by Taguchi Method

Investigation on the Effect of Projection Types on Stud Weld Strength by Taguchi Method

Microstructure and Failure Analysis of Resistance Projection Welding of Nuts to AHSS with Capacitor Discharge Welding

Analysis of Projection Welding in Relation to the Non-Parallelism of Electrodes

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