scholarly journals Parameter Optimization: Force (F), Time (T) and Current Intensity (I), in the RSW Welding Process of DP-290 Steel Plates Using the Taguchi Method

2018 ◽  
Vol 23 (2) ◽  
pp. 157-167 ◽  
Author(s):  
F. Reyes-Calderón ◽  
R. Vences-Hernández ◽  
J.A. Salazar-Torres ◽  
H.J. Vergara-Hernández ◽  
I. Aguilera-Navarrete ◽  
...  
Keyword(s):  
Taguchi Method ◽  
Automotive Industry ◽  
Spot Welding ◽  
Dual Phase Steel ◽  
Welding Process ◽  
Steel Plates ◽  
Optimal Parameters ◽  
Lower Intensity ◽  
Structural Parts ◽  
Peel Tests

Abstract Automotive industries are trying to use new light materials for structural parts of vehicles. However, the steels are being the best manufacturing material option in the automotive industry. One of the advanced steels commonly used due to the high mechanical properties is the Dual Phase Steel (Ferritic-Martensitic). Therefore, the welding process is still very important and a matter of improvement. The present work shows the design of an experimental matrix using the Taguchi method with the optimal parameters to apply in the spot welding process (RSW) of a DP-290 steel; the metallographic characterization, the microhardness and the Peel tests were also carried out in each specimen. The results determined that the lower intensity of current and a medium pressure for a longer time the better resistance to tearing, due to the microstructural changes in the specimens.

scholarly journals MULTI-OBJECTIVE OPTIMIZATION OF THE RESISTANCE SPOT-WELDING PROCESS PARAMETERS FOR THE WELDING OF DUAL-PHASE STEEL DP500

2021 ◽  
Vol 55 (2) ◽  
pp. 201-206
Author(s):  
Aleksija Djuric ◽  
Dragan Milčić ◽  
Damjan Klobčar ◽  
Biljana Marković
Keyword(s):  
Automotive Industry ◽  
Resistance Spot Welding ◽  
Spot Welding ◽  
Dual Phase Steel ◽  
Mechanical Characteristics ◽  
Welding Process ◽  
Dual Phase ◽  
Multi Objective Optimization ◽  
Multi Objective ◽  
Resistance Spot

Resistance spot welding (RSW) is still the most used form of welding in the automotive industry, primarily for welding steel. One of the advanced steels used in the automotive industry is dual-phase steel, so it is important to properly select the welding parameter for these steels. Therefore, this paper presents multi-objective optimization in the RSW welding process of DP 500 steel. The paper considers three different mechanical characteristics i.e., the failure load (F), failure displacement (l) and weld nugget diameter (D), as all these welding characteristics play significant roles in evaluating the quality of spot welding. The results show that the welding current is the most influential parameter with respect to the mechanical characteristics. The effect of welding time on the weld quality is the least significant. The optimal parameters for welding DP 500 steel obtained in this paper are weld current 8 kA, electrode force 4.91 kN and weld time 400 ms.

Research on Weldability for Dual-Phase Steels Using Servo Gun Spot Welding System

2007 ◽  
Vol 353-358 ◽  
pp. 1597-1600 ◽  
Author(s):  
Xiao Yun Zhang ◽  
Yan Song Zhang ◽  
Guan Long Chen
Keyword(s):  
Automotive Industry ◽  
Spot Welding ◽  
Dual Phase Steel ◽  
Welding Process ◽  
Ferrite Matrix ◽  
Dual Phase ◽  
Control Electrode ◽  
Electrode Force ◽  
Welding System ◽  
Metal Failure

Dual-phase steel is a mixture of ferrite matrix and martensitic islands distributed at grain boundaries with the possible addition of bainite. Its formability, capacity to absorb crash energy, and ability to resist fatigue make it a desirable material for use in the automotive industry to enhance automobile’s strength and reduce its weight. However, the resistance spot weldability of dual-phase steel is sometimes limited by a propensity for weld metal failure due to the welding process. To improve its weldability, a servo gun spot welding system is introduced to control electrode force during the welding process. The paper take 1.5mm DP600 steels as an example, experimental data shows that by optimizing electrode force during welding process, the width of weld lobe can be enlarged from 0.9kA to 2.1kA and the weldability of dual phase steel is improved greatly.

Welding of Aluminum to DP600 Steel Plates by Refill Friction Stir Spot Welding Process (Refill FSSW): Preliminary Results

2014 ◽  
Vol 1082 ◽  
pp. 123-132 ◽  
Author(s):  
Roger Navarro Verastegui ◽  
José Antonio Esmerio Mazzaferro ◽  
Cíntia Cristiane Petry Mazzaferro ◽  
Telmo Roberto Strohaecker ◽  
Jorge Fernandez Dos Santos
Keyword(s):  
Spot Welding ◽  
Rotation Speed ◽  
Welding Process ◽  
Steel Plates ◽  
Mechanical Resistance ◽  
Shear Tests ◽  
Friction Stir ◽  
Lap Shear ◽  
Substantial Change ◽  
Tool Rotation

The main objective of the current work was to produce sound Refill FSSW joints between AA6181-T4 aluminum and DP600 steel plates. The steel plates were used in two different surface conditions: with and without galvanized surface layer. The Taguchi statistical method was used to find out the set of parameters indicated to produce joint with higher mechanical resistance. Then, the possibility of joining these dissimilar metals using the Refill FSSW process was verified. Tool rotation speed and welding time were varied to observe its effect over the joint behavior. The results of lap shear tests showed that galvanized layers do not cause any substantial change on the final joint mechanical resistance, even though different joining mechanisms had been observed.

Application of TOPSIS and ANOVA Methods to Evaluate the Electrical Resistance Spot Welding Process Parameters of AISI 1020 Steel

2020 ◽  
Vol 12 (4) ◽  
Author(s):  
Harshavardhana Natarajan ◽  
Sundar Singh Sivam Sundarlingam Paramasivam ◽  
Durai Kumaran ◽  
G. Balakumaran ◽  
R. Naveen
Keyword(s):  
Spot Welding ◽  
Hold Time ◽  
Welding Process ◽  
Current Control ◽  
Production Costs ◽  
Steel Plates ◽  
Test Results ◽  
Electrode Current ◽  
The Cost

Deformation and deterioration of the electrode caused by chemical reaction is resistant to AISI 1020 with caps screw electrodes. In this study, squeeze, weld, hold time, current and pressure is evaluated for the nugget diameter. OP1is the surface waviness, OP2 is the force, OP3 is the nugget height and OP4 is welded by spot welding on steel plates. AISI 1020 steel plates with thicknesses of 0.8 mm and 1.5mm for connecting the cap screw electrode, current and clock sensor with current control for 120 kVA capacitors are connected. The cycle welding currents of 5, 10, 15, 20 and 25 were selected and increased from 8 kA to 10 kA is done during the welding process. In this study, OP1 to OP4 are selected and the verification experiment is performed in an optimal state to observe the development accuracy. Based on confirmation of test results, it was determined to develop a model that can be effectively used to predict the size of weld surface thereby improving the quality of the weld and calculating the cost of the top screw head. The welded joints of two electrodes are exposed to weld radius. The groove, force and valve height are calculated by the ingot detector, dynamometer and ultrasonic. This allows the workstation to be welded to the desired contour while reducing its production costs.

Welding sequence optimisation in the automotive industry: A review

2019 ◽  
Vol 233 (17) ◽  
pp. 5945-5952
Author(s):  
Varshan Beik ◽  
Hormoz Marzbani ◽  
Reza Jazar
Keyword(s):  
Automotive Industry ◽  
Spot Welding ◽  
Fast Rate ◽  
Welding Process ◽  
Future Research ◽  
Automotive Body ◽  
Welding Sequence ◽  
Common Technique ◽  
The Common

Spot welding is the most common technique used to join sheet metals in the automotive industry due to the fast rate of production. Optimising the welding process including the sequence, number and location of the welds would significantly improve the quality of the final product and production cost. This paper presents an overview on the available methods to plan and optimise various aspects of the welding process including welding sequence, weld quantity and location. Firstly, the welding concept in the automotive industry is briefly reviewed. Secondly, the welding process optimisation with emphasis on the welding sequence is discussed. The common gaps and challenges are identified and, lastly, future research to plan and optimise the welding sequence in the automotive body is outlined.

The Investigation of Partial Penetration Lap Laser Welding Applied on Stainless Steel Railway Vehicles

2010 ◽  
Vol 97-101 ◽  
pp. 3832-3835 ◽  
Author(s):  
Hong Xiao Wang ◽  
Chun Sheng Wang ◽  
Chun Yuan Shi ◽  
Jing Fei Xiao
Keyword(s):  
Stainless Steel ◽  
Laser Welding ◽  
Spot Welding ◽  
Welding Process ◽  
Mechanical Tests ◽  
Optimal Parameters ◽  
Railway Vehicles ◽  
Partial Penetration ◽  
Weak Points ◽  
Laser Welding Process

The current stainless steel railway vehicles body and structure are usually assembled by resistance spot welding process. The weak points of this process are the poor surface quality and bad airtight due to the pressure of electrodes. In this study, the partial penetration lap laser welding process was investigated to resolve the problems. The effects of the laser welding process parameters such as laser power, welding speed and focused distance to the shape of the weld seam and the shear tensile strength were discussed to find the optimal parameters. And the mechanical tests and microstructure analysis were also taken in this study. The optimal parameters are P=2.0kW，S=22mm/s，F=0mm. This work has great significance of improving the manufacturing level of stainless steel railway vehicles.

scholarly journals Energy reduction for the spot welding process in the automotive industry

2007 ◽  
Vol 76 ◽  
pp. 012022 ◽  
Author(s):  
J D Cullen ◽  
N Athi ◽  
M A Al-Jader ◽  
A Shaw ◽  
A I Al-Shamma'a
Keyword(s):  
Automotive Industry ◽  
Spot Welding ◽  
Welding Process ◽  
Energy Reduction
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