Clinching of Steel Sheets Used in Automotive Industry

2015 ◽  
Vol 808 ◽  
pp. 75-79 ◽  
Author(s):  
Gábor Béres ◽  
József Danyi ◽  
Ferenc Végvári
Keyword(s):  
Experimental Research ◽  
Automotive Industry ◽  
Resistance Spot Welding ◽  
Heat Effect ◽  
Spot Welding ◽  
Steel Sheet ◽  
Research Work ◽  
Material Structure ◽  
Cold Forming ◽  
Steel Sheets

Clinching is a mechanical cold forming method to join two or more overlapping sheets without using of rivet. This technology is already in use for production of aluminium and steel sheet car body panels. This process is carried out without heat effect on the material structure. Thus the clinching is one of the technologies which may replace traditional processes as resistance spot welding or frictional spot welding. The clinching technology has been well known many years ago, but only during last decade gets more increased interest especially in automotive industry. This paper presents the results of experimental research work in field of clinching of different (high and soft) strength steel sheets developed for automotive industry.

scholarly journals Joining three car body steel sheets by clinching method

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Ľuboš Kaščák ◽  
Emil Spišák ◽  
Jana Majerníková
Keyword(s):  
Resistance Spot Welding ◽  
Spot Welding ◽  
Material Structure ◽  
Car Body ◽  
Resistance Spot ◽  
Steel Sheets ◽  
Alternative Method ◽  
Metallographic Observation ◽  
Body Production

Abstract The optimization of a car body in terms of cost can be achieved by using different materials in various positions of the car in order to utilize specific properties of each different material. Resistance spot welding is the most used method of joining in car body production, but it is not always easy or even possible to join some combination of materials by this method. Clinching is an alternative method to spot welding, as a combination of drawing and forming. The research is focused on the evaluation of clinched joints’ properties using shearing test and metallographic observation of material structure.

Effect of Gap between Steel Sheet and Electrode on Resistance Spot Welding

2018 ◽  
Vol 941 ◽  
pp. 158-163 ◽  
Author(s):  
Sho Matsui ◽  
Chisato Wakabayashi ◽  
Shinji Kodama
Keyword(s):  
Resistance Spot Welding ◽  
Spot Welding ◽  
Joint Strength ◽  
Steel Sheet ◽  
High Tensile Strength ◽  
Resistance Spot ◽  
Steel Sheets ◽  
Tension Tests ◽  
Cross Tension

If resistance spot welding (RSW) is conducted when there is a gap between a steel sheet and an unmovable electrode, the steel sheets are bended by a movable electrode, and the quality of RSW is influenced. Therefore, it is necessary to understand the effect of the gap on RSW. In this study, two high-tensile strength steel sheets were welded with the gap. In addition, cross-section observations and cross tension tests were conducted to verify the effect of the gap on weldability and joint strength. Consequently, two notable results were obtained. First, the observation indicated that deformation around the corona-bond was varied depending on the gap. Second, the cross tension tests showed that the gap decreased the joint strength even though the nugget was large enough. These result indicated that controlling the gap is important to ensure the quality of RSW.

Experimental Investigations on Capabilities of Resistance Spot Welding and MIG Brazing for Producing Corrugated Beams Using Galvanized Steel Sheets

2021 ◽  
Vol 1164 ◽  
pp. 47-54
Author(s):  
Bogdan Radu ◽  
Viorel Ungureanu ◽  
Ioan Both ◽  
Mircea Burcă ◽  
Ştefan Benzar ◽  
...  
Keyword(s):  
Resistance Spot Welding ◽  
Spot Welding ◽  
Materials Science ◽  
Research Work ◽  
Steel Structures ◽  
Galvanized Steel ◽  
Experimental Investigations ◽  
Steel Beams ◽  
Resistance Spot ◽  
Steel Sheets

This paper summarized the research work carried out by a team from Department of Steel Structures and Structural Mechanics, together with Department of Materials Science and Engineering, from University Politehnica Timisoara, which tried to determine the possibility to use welding for obtaining built-up cold-formed steel beams made of corrugated galvanized steel sheets (grade S350GD+Z). There were analyzed two joining processes: MIG brazing and Resistance Spot Welding with the aim to replace the self-drilling screws used until now. The results are very promising and these solutions of joining have beside economic advantages also technical and quality ones.

Resistance spot welding of additively manufactured maraging steels Part II: Failure behavior

2021 ◽  
pp. 1-31
Author(s):  
Cheng Luo ◽  
Yansong Zhang ◽  
Michael Oelscher ◽  
Yandong Shi ◽  
Niels Pasligh ◽  
...  
Keyword(s):  
Selective Laser Melting ◽  
Fracture Mode ◽  
Automotive Industry ◽  
Material Properties ◽  
Resistance Spot Welding ◽  
Spot Welding ◽  
Melting Process ◽  
Spot Welds ◽  
Laser Melting ◽  
Maraging Steels

Abstract Application of maraging steels via selective laser melting process in the automotive industry was unavoidably involved in the resistance spot welding with conventional steels. Due to the rapid cooling rate of welding process, selective laser melted maraging steels with unique chemical components and stack microstructure could induced the different microstructural evolution, resulting in the complicated fracture behavior in the spot welds. This paper developed a FEA model to predict the fracture mode of spot welds of DP600 to maraging steel and the effect of test conditions and printing orientations were studied. A method was proposed to calculate the material properties of fusion zone by introducing the combined effect of melting DP600 and maraging steels via selective laser melting, resulting in the accurate prediction of fracture mode and strength of spot welds. An interlayer with lower strength was found around the fusion zone and the fracture path propagated in the region, resulting in the partial interfacial failure of spot welds. Meanwhile, the printing orientation had no significant effect on the fracture mode and strength of spot welds, but the different material properties of maraging steels could affect the fracture displacement of spot welds. These findings could pave a way to guide the application of maraging steels via selective laser melting process in multiple industries, especially in the automotive industry.

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