Resistance spot-, projection- and seam-welding. Method for determining the transition resistance on aluminium and steel material

2015 ◽  
Keyword(s):  
Seam Welding ◽  
Resistance Spot ◽  
Welding Method ◽  
Steel Material ◽  
Transition Resistance

Comparison between Simple Seam Welding and Adjacent Parallel Seam Welding by Magnetic Pulse Sheet-Welding Method

2018 ◽  
Vol 910 ◽  
pp. 19-24
Author(s):  
Tomokatsu Aizawa ◽  
Kazuo Matsuzawa
Keyword(s):  
High Speed ◽  
Magnetic Pulse ◽  
Seam Welding ◽  
Magnetic Pulse Welding ◽  
Seam Weld ◽  
Small Cavity ◽  
Welding Method ◽  
Pulse Welding

This paper describes the comparison between simple seam welding and adjacent parallel seam welding by a magnetic pulse welding method for Al-Al sheets. In the case of the parallel seam welding, the sheets collided at high speed in two parallel along a narrow central part of a one-turn flat coil. The central part had two parallel upper parts. The width of the central part was same as that of the simple seam welding. The increase of the parallel seam-weld zones was more than double in total in comparison with the simple seam-weld zones. Two inside parallel seam-weld zones were connected each other with a small cavity.

scholarly journals PENGARUH WAKTU PENGELASAN TITIK (SPOT WELDING) TERHADAP KEKERASAN, KEKUATAN GESER DAN DIAMETER NUGGET PADA BAJA SPCEN 1,6 mm

Otopro ◽  
2020 ◽  
Vol 16 (1) ◽  
pp. 1
Author(s):  
Riantono Rasyid ◽  
Novi Sukma Drastiawati
Keyword(s):  
Shear Strength ◽  
Resistance Spot Welding ◽  
Spot Welding ◽  
Maximum Load ◽  
Steel Plates ◽  
Welding Time ◽  
Average Yield ◽  
Resistance Spot ◽  
Nugget Diameter ◽  
Steel Material

The development of technology in manufacturing is currently very fast. One of the important processes involved is joining, including the process of resistance spot welding or better known as spot welding. The use of point welding has several advantages, including a neat shape of the joint, the process is faster, the connection is tighter and the operation is relatively easy and does not require filler metal. The connection of relatively thin plate-shaped steel using resistance spot welding is an alternative option that is widely used by the automotive parts production industry. However, there are no data regarding the best time and data regarding the hardness test, nugget diameter, and shear test on SPCEN steel material. This study aims to determine the effect of spot welding time on hardness, shear strength and nugget diameter on SPCEN steel material. This study used an experimental method with a time variable of 1 second, 2 seconds and 3 seconds with standard material SPCEN JIS G 3141, standard hardness testing using DIN 50103 and standard shear testing using ASTM D 1002. equal that is 3.3 mm. The lowest average nugget hardness results are found on steel plates marked with the name ABC, time of 1 second with an average nugget hardness of 116.6 HRB and the highest average nugget hardness is found on GHI steel within 3 seconds with an average nugget hardness of 117 , 9 HRB. The lowest average yield of shear strength is found in ABC steel at 1 second with a maximum shear strength of 294.82 N / m² and a maximum load of 1592.01 Newton, the highest average yield of shear strength is found on steel plates marked with the name GHI time 3 seconds with a maximum tension of 415.89 N / m² and a maximum load of 2245.83 Newton. Thus the longer the spot welding time (spot welding), the greater the current used, the greater the heat generated and the hardness and shear strength become stronger. Shows the best time for spot welding (spot welding) of 1.6 mm SPCEN steel plate in 3 seconds.

scholarly journals Non-destructive testing of welded fatigue specimens

2020 ◽  
Vol 318 ◽  
pp. 01033
Author(s):  
Sofia Papanikolaou ◽  
Dimitrios Fasnakis ◽  
Andreas Maropoulos ◽  
Dimitrios Giagopoulos ◽  
Stergios Maropoulos ◽  
...  
Keyword(s):  
Fatigue Testing ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Metallographic Examination ◽  
Welding Method ◽  
Steel Material ◽  
The One ◽  
Non Destructive ◽  
Wheel Material ◽  
Ultrasound Testing

Non-destructive tests were conducted on welded fatigue specimens prepared using the same steel material and welding method as the one used in the manufacture and repair procedures of a KRUPP SchRs 600 bucket wheel excavator to reveal any defects present. The chemical composition, the mechanical properties, tendency to cracks and the microstructure of the bucket wheel material were determined using appropriate tests. The initiation of cracks and their subsequent growth during fatigue testing of the welded specimens was studied using ultrasound testing (UT) and a metallographic examination in order to investigate the causes of failure during service and predict fatigue life of the bucket wheel welded parts. It was found that the welding method used produces welds with numerous discontinuities that can only be detected using ultrasound techniques.

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