Fatigue characteristics of welded joints alloy 01420C made by resistance spot welding and automatic argon arc are obtained. The highest durability was shown with a longitudinal weld. Joints Produced simulating the edge line reinforced element have comparable to an unloaded weld spot, which in turn is inferior joint elements limited cross-section repair mechanical cut similar standard sample for...

With the continuing development of bottom-up nanotechnology fabrication processes, spot welding can play a role similar to its macro counterpart for the interconnection of nano building blocks for the assembly of nanoelectronics and nanoelectromechanical systems (NEMS). Spot welding using single-crystalline copper-filled carbon nanotubes (CNTs) is investigated experimentally using nanorobotic m...

Electrode degradation in the continuous resistance spot-welding process of baked hardening (BH) 220 steel was evaluated by an electrode life test, and weldability tests were conducted geometry feature measurement, mechanical property analysis, diameter measurement with 88 or 176 weld intervals. The analysis shows that heat-affected zone (HAZ) width, nugget diameter, area tend to decrease rapidl...

Resistance spot welding is a simple process with high speeds and one of the most economical productive processes. It applied in various industries such as automobile, aircraft, home appliance; thus, demand for monitoring quality increasing. Owing to nature resistance process, there are several factors that can be monitored, dynamic value, which determined using current voltage measurements, dis...

Acoustic emission monitoring has been successfully employed in different application areas such as of fatigue loaded bridges and pressure testing vessels. However, this technology on resistance (spot) welding processes yielded limited results. Existing literature only mentions the detection certain defects expulsion cracked welds. Detecting nugget nucleation growth, to allow prediction diameter...

This thesis presents a process planning methodology for a rapid injection mold tool manufacturing system that involves additive and subtractive techniques, whereby slabs are sequentially bonded and milled using layered tool paths. Mold tools are grown in a bottom up fashion, eliminating the need for multi-axis machining operations (beyond three axes) and allowing small features in deep cavities...

In this paper a novel laser impact spot welding (LISW) method is described, in which a hump was formed on the flyer plate on the intended welding spot location by local pre-forming. When the flyer and base plates were placed together to perform welding, the two plates kept in contact over their entire surfaces except at the hump, where a local air gap was enough to guarantee the impact velocity...

Resistance spot welding is a very complicated process involving electro-magnetic, thermal, fluid flow, mechanical and metallurgical variables. Since weld nugget area is close and unobservable with experimental means, numerical methods are mainly used to reveal the nugget formation mechanism. So far, heat transfer behaviors in the weld nugget have been systematically studied with traditional ele...