Nugget formation and its mechanism of resistance spot

Nugget formation and its mechanism of resistance spot

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Xueyu Pan's research works Changan Automobile,

Xueyu Pan's 3 research works with 43 citations and 589 reads,including Nugget formation and its mechanism of resistance spot welded joints in DP600 dual-phase and DC54D ultralow carbon steelWeld nugget formation and mechanical properties of three In this paper,weld nugget formation and mechanical properties of 125/125/125 mm three-sheet low carbon steel resistance spot welds are investigated.Heat conduction from sheet/sheet interfaces (i.e.places with higher electrical resistance) to the geometrical centre of the joint and heat dissipation via water cooled electrodes play an important role in weld nugget growth of three-sheet resistance spotWeld nugget development and integrity in resistance spot Spot welds were produced using a high-strength cold-rolled sheet steel 0.08-in.(1.9-mm) thick.The welding parameters were systematically varied to examine their effects on nugget formation,microstructure,and mechanical properties.Following welding,several spot welds were cross-sectioned and mechanically polished for metallographic examination.Other spot welds were submitted to shear

WELDING RESEARCH

ABSTRACT.The nugget formation mechanism in resistance spot welding and its effect on the welding process parame- ters are examined by using a digital high- speed camera to visually monitor and ob- serve the process of nugget formation.A modified half-section truncated-dome electrode and illumination system are in-Real Time Monitoring Weld Quality of Resistance Spot lapse,heating of the work pieces,molten nugget formation,nugget growth,and mechanical collapse),based on the pat-tern changes of the dynamic resistance.Cho et al.8) exam-ined the nugget formation mechanism in resistance spot welding and its effect on the welding process parameters by using a digital high speed camera.It was conrmed Real Time Monitoring Weld Quality of Resistance Spot lapse,heating of the work pieces,molten nugget formation,nugget growth,and mechanical collapse),based on the pat-tern changes of the dynamic resistance.Cho et al.8) exam-ined the nugget formation mechanism in resistance spot welding and its effect on the welding process parameters by using a digital high speed camera.It was conrmed

REVIEW ON MODELING OF RESISTANCE SPOT

et.al.[09].The mechanism of electrode degradation during the RSW of coated steels was investigated by Parker et.al.[10].A two stage experimental designing methodology was used by Li et.al.[11].to predict the quality characteristics of resistance spot welds.The step by step formation of RSW nugget was investigated by Cho andPrimary Circuit Dynamic Resistance Monitoring and its nugget formation.Unlike the initial con- tact resistance of the faying surface,the dynamic resistance includes information on nugget formation as welding occurs (Refs.13,15,21,22).Generally,the re- sistance can be obtained by the voltage di- vided by the current.In resistance spotPrevious123456NextNugget Formation During Resistance Spot WeldingKeywords Resistance spot welding,Finite element modeling,Nugget formation,Welding electrode,Numerical method simulation,I.INTRODUCTION ESISTANCE spot welding (RSW) is a widely used process of joining the metal sheets in automotive and aerospace industries.As the name implies,it is the resistance of the

Optimization of Double-pulse Process in Resistance Spot

22MnB5 joint,a dual-nugget resistance spot welding process was developed.It was realized by employing double-pulse welding schedule.The 1st pulse was used to form a normal nugget.The 2nd pulse was used to form the second nugget or quasi-nugget inside the first one.Under the process of 2nd pulse welding,the maximum temperature ofNumerical study of nugget formation in resistance spotsimulation of resistance spot welding (RSW),have been developed [6-9].In this paper a 2D axisymmetric model of finite element method was developed to simulate RSW process,using commerical software,ANSYS.Temperature distributions at different weld stages were obtained.Through temperature distributions weld nugget formation and its size wereNumerical simulation of weld nugget in resistance spot Jan 01,2020 Nugget formation and its mechanism of resistance spot#0183;Spot welding has been completed by utilizing a 35 kVA DC type resistance spot welding machine,constrained by a Programmable Logic Controller unit.For both materials,two spots,three spots and four spots weld were done in order to obtain various comparative results.The weld nugget formation has been simulated using SIMULIA.

Numerical simulation of weld nugget in resistance spot

Jan 01,2020 Nugget formation and its mechanism of resistance spot#0183;Abstract.The resistance spot welding (RSW) stands different over other welding techniques as the actual weld nugget is shaped internally relative to the surface of the base metal.The weld formed is fundamentally a mix of heat,pressure and time.The welding conditions are precisely controlled to produce sound nuggets.Nugget formation and its mechanism of resistance spot welded joints in DP600 dual-phase and DC54D ultralow carbon steel.Resistance spot welded joints in different configurations of DP600 and DC54D were investigated to elucidate the nugget formation process and mechanical properties of the resultant joints.Results show that,when the welding time was less than 4 cycles,the fusion zone (FZ) was not formed,but the heat-affected zone (HAZ) occurred with a butterfly shape.Author:Ci Li,Xinjian Yuan,Kanglong Wu,Haodong Wang,Zhan Hu,Xueyu PanCited by:3Publish Year:2017Nugget formation and its mechanism of resistance spot Was this helpful?Images of Nugget formation and its mechanism of resistanc imagesNugget formation and its mechanism of resistance spot Apr 22,2017 Nugget formation and its mechanism of resistance spot#0183;Resistance spot welded joints in different configurations of DP600 and DC54D were investigated to elucidate the nugget formation process and mechanical properties of the resultant joints.Results show that,when the welding time was less than 4 cycles,the fusion zone (FZ) was not formed,but the heat-affected zone (HAZ) occurred with a butterfly shape.Nugget formation and its mechanism of resistance spot Nugget formation and its mechanism of resistance spot welded joints in DP600 dual-phase and DC54D ultralow carbon steel.Resistance spot welded joints in different configurations of DP600 and DC54D were investigated to elucidate the nugget formation process and mechanical properties of the resultant joints.Results show that,when the welding time was less than 4 cycles,the fusion zone (FZ)

Nugget formation and growth during resistance spot

Nugget formation and growth during resistance spot welding of aluminium alloy 5182 M.Rashid1,2,J.B.Medley2 and Y.Zhou2 Surface interaction at the worksheet/worksheet interface during resistance spot welding of aluminium alloy 5182 with spherical tip electrodes was investigated.Oxide layer cracking and nugget formation were focused.Nugget Formation and Characterization of Effect of Cover The formation mechanism and control methods of solidification defects such as shrinkage cavities and cracks are discussed.The results show that independent nuggets form on aluminum alloy and highstrength steel side,respectively,when two kinds of cover plates are added.Nugget Formation and Characterization of Effect of Cover Nugget Formation and Characterization of Effect of Cover Plate on the Formation of Solidification Defects in Resistance Spot Welding of Dissimilar Al6016/ HC420LA Steel.

Metallic bump assisted resistance spot welding (MBaRSW)

Aug 01,2019 Nugget formation and its mechanism of resistance spot#0183;A novel process,i.e.,metallic bump assisted resistance spot welding (MBaRSW) process was proposed for joining aluminum alloy and steel,and the formation mechanism of the MBaRSW welds were investigated through comparing with traditional RSW ones in this part.The following conclusions could be drawn 1)Measurement of Transient Temperature Response during found that nugget formation initiated at the faying interface with truncated-cone electrodes and at the electrode interface with dome-type electrodes.Introduction Since the development of resistance spot welding,a large amount of work has been devoted to understanding the mechanism of nugget formation and electrode wear.Electrode Life and Weldability Improvement inImprovement in Resistance Spot Welding of DP600 by Dongwoon Huh strength.The effect and mechanism of inserted electrode were verified with commercial FEA software.The results of different weld current flow,nugget formation,and heat distribution were

Effect of a slightly concave electrode on resistance spot

Nugget sizes and tensile-shear strengths of QP1180 resistance spot welds obtained with different electrodes.Download Download high-res image (672KB) Download Download full-size image; Fig.8.Macrostructure of QP1180 resistance spot welds with expulsion obtained with dome-radius electrode and slightly concave electrode.Effect of Welding Current on Weld Formation Wang et al.established a finite element model for resistance spot welding of DP590 steel,and the nugget formation process was investigated.The simulative result for nugget size was obviously bigger than that of the experiment under a large welding current,although they were well fitted under aComparison of mechanical properties and the nugget The design idea was to increase the strength of welded joints by the formation of a large nugget with low indentation depth.The strength and the nugget formation of joints produced by the RAW,and the traditional spot welding (RSW) were comparatively investigated by the microstructural,artificial neural network,and finite element model analyses.

Coating behaviour and nugget formation during resistance

In this work,the effects of the coating composition and the welding parameters on the heat generation and nugget formation during resistance spot welding of the hot press forming steels have been evaluated.Two types of coated steels were used,termed as AlSi and Zn coating.AlSi coated steel showed rapid nugget growth toward the electrode direction,which is the probable reason of the Cited by 3Publish Year 2017Author Ci Li,Xinjian Yuan,Kanglong Wu,Haodong Wang,Zhan Hu,Xueyu PanNugget formation and its mechanism of resistance spot Nugget formation and its mechanism of resistance spot welded joints in DP600 dual-phase and DC54D ultralow carbon steel.Article (PDF Available) in Metals and Materials International 23 (3 Cited by 3Publish Year 2017Author Ci Li,Xinjian Yuan,Kanglong Wu,Haodong Wang,Zhan Hu,Xueyu PanExperimental study of nugget formation in resistance spot The nugget formation mechanism in resistance spot welding and its effect on the welding process parameters are examined by using a digital high-speed camera to visually monitor and observe the

Ci Li's research works Chongqing University,Chongqing

Resistance spot welded joints in different configurations of DP600 and DC54D were investigated to elucidate the nugget formation process and mechanical properties of the resultant joints.Analyses of Nugget and Expulsion Formation ProcessIn this paper,nugget growth stages during resistance spot welding between aluminum alloy and steel,such as surface breakdown,asperity softening,temperature rising,molten nugget formation,nugget growth and mechanical collapse,was analyzed according to resistance dynamic variation during welding.The effects of work pieces surface condition and electrode force on the occurrence of inter Analyses of Nugget and Expulsion Formation ProcessIn this paper,nugget growth stages during resistance spot welding between aluminum alloy and steel,such as surface breakdown,asperity softening,temperature rising,molten nugget formation,nugget growth and mechanical collapse,was analyzed according to resistance dynamic variation during welding.The effects of work pieces surface condition and electrode force on the occurrence of inter

An investigation of nugget formation and simulation in

Resistance spot welding is an important part of the automotive manufacturing industry.Today's automobiles typically contain five-thousand or more welds.Spot welding is attractive to the industry for its speed and relative simplicity,however,it is not without its disadvantages. This study seeks to characterize the nugget formation An investigation of nugget formation and simulation in Resistance spot welding is an important part of the automotive manufacturing industry.Today's automobiles typically contain five-thousand or more welds.Spot welding is attractive to the industry for its speed and relative simplicity,however,it is not without its disadvantages. This study seeks to characterize the nugget formation AN INVESTIGATION OF NUGGET FORMATION ANDAN INVESTIGATION OF NUGGET FORMATION AND SIMULATION IN RESISTANCE SPOT WELDING By Richard M.Obert B.S.,Mechanical Engineering Rensselaer Polytechnic Institute,1999 Submitted to the Department of Mechanical Engineering in Partial Fulfillment of the Requirements for the Degree of MASTERS OF SCIENCE IN MECHANICAL ENGINEERING At the

12345NextAN INVESTIGATION OF NUGGET FORMATION AND

AN INVESTIGATION OF NUGGET FORMATION AND SIMULATION IN RESISTANCE SPOT WELDING By Richard M.Obert B.S.,Mechanical Engineering Rensselaer Polytechnic Institute,1999 Submitted to the Department of Mechanical Engineering in Partial Fulfillment of the Requirements for the Degree of MASTERS OF SCIENCE IN MECHANICAL ENGINEERING At the(PDF) Weld nugget formation and mechanical properties of In this paper,weld nugget formation and mechanical properties of 1.25/1.25/1.25 mm three-sheet low carbon steel resistance spot welds are investigated.(PDF) Effect of Al-Si Coating on Weldability of Press Resistance spot welding (RSW) of Al-Si-coated PHS was undertaken,and the effect of Al-Si coating on nugget formation and mechanical properties was investigated.

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Carbon low alloy steel

A283 Grade A,A36,A572 Grade 42,A572 Grade 50 .

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Weathering steel plate

Corten A,A588Grade B,S355J0WP,S355J2WP,05CuPCrNi.

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Shipbuilding Steel Plate

ABS/A steel,ABS AH32,LR AH36,RINA EH36.

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50CrMo4,42CrMo4,12Cr1MoV,25MnTi.

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