Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 28 for “"Spot welding"”.
-
Fundamentals of friction stir spot welding
… and calls for more attention. Friction Stir Spot Welding (FSSW) is an evolving technique that offers several advantages over conventional joining processes.</p> <p>The fundamentals aspects of FSSW are systematically studied in this dissertation. The effects and influence of process inputs …
-
Modelling of friction stir spot welding
Friction stir spot welding (FSSW) is a solid-state welding process which is especially useful for joining precipitation-hardened aluminium alloys that undergo adverse property changes during fusion welding. It also has potential as an effective method for solid-state joining of dissimilar alloys. …
-
Analyses of resistance spot welding lobe curve
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1989.
-
Resistance spot welding of galvanized steel sheet
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1984.
-
Proximity effect in spot welding of stainless steel
Thesis: M.S., Massachusetts Institute of Technology, Department of Naval Architecture and Marine Engineering, 1936
-
An investigation of nugget formation and simulation in resistance spot welding
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. Current spot …
-
Ultrasonic phased array imaging and data post processing with applications to resistance spot welding
Resistance spot welding is a widely used metal joining method in the automotive industry due to its low cost, ease of automation and high throughput. Resistance spot welding is a process that joins two or more metal sheets through the application of force and high current in a localized region, or …
-
An investigation of resistance spot welding current and time parameters for different thicknesses of SAE CR 1010 steel
… maxima and minima values, within limits of the welding machine parameters: current and time, for 28 gauge, 24 gauge, 20 gauge, 18 gauge, and 16 gauge of SAE CR 1010 steel. 2. To implement and calibrate the instrumentation necessary to determine accurate values, within limits, of the variables …
-
INVESTIGATION OF SPOT WELDING ELECTRODE TIP WEAR AND A NON-DESTRUCTIVE TEST OF PLASTIC JOINING IN THE AUTOMOTIVE INDUSTRY
The automotive industry is reliant on resistance spot-welding just as the sandwich making industry is reliant on bread. An automobile contains an average of 5000 welds. The quality of these welds is inspected and governed by certain standards. In order to maintain these standards there are …
-
An Analysis of the Fatigue Resistance of Beta Titanium and the Effect of Spot-Welding Upon the Fatigue Resistance of this Alloy
… curve for beta titanium, determine the effect of spot-welding upon the fatigue resistance of this alloy, and provide qualitative observations about surface characteristics of different batches of TMA in relation to their fatigue lives. Rectangular .016" x .022" 1MA was evaluated. Twelve specimens …
-
Structural modelling of adhesive joints in automotive bodies
… the sheet components in the body shell. Although spot-welding is the predominant joining method for the construction of steel bodies in the automotive industry, other alternatives are now being considered. Adhesive bonding offers the best potential because the uniform load distribution in the …
-
Ultrasonic Real-Time Quality Monitoring Of Aluminum Spot Weld Process
The real-time ultrasonic spot weld monitoring system, introduced by our research group, has been designed for the unsupervised quality characterization of the spot welding process. It comprises the ultrasonic transducer (probe) built into one of the welding electrodes and an electronics hardware …
-
Rapid Prototyping of a Directly Heated Thermionic Triode Using 3D Printing Techniques
… triode was constructed using 3D printing and spot-welding techniques. Thick film silver and encapsulant materials were printed on a soda lime glass substrate to form the triode electrodes and ceramic wall bonding layer respectively. The anode was printed with a layer of silver, and the grid …
-
Spot Friction Welding of Ultra High-Strength Automotive Sheet Steel
<p>Spot friction welding (SFW) was performed on ultra high strength steel (UHSS) steel sheet commonly used in automobile manufacturing. Alloys studied included DP780, DP780EG, DP980, and DF140T sheet steel of varying thickness from 1.2 mm to 1.4 mm. Welding was accomplished using a PCBN standard …
-
Finite element analysis of self-pierce riveting in magnesium alloys sheets
… fusion joining methods such as resistance spot welding have been demonstrated to not be effective for magnesium alloys. Therefore, self-pierce riveting (SPR) has been presented as an attractive joining technique for these lightweight metals. However, SPR must be performed at elevated …
-
Caracterización del proceso de soldadura por puntos por fricción agitación empleando el análisis de señales vibroacústicas
Welding plays an important role in industrial processes, among the most important of which are electronic arc welding with consumable and non-consumable electrode; solid phase welding (cold welding, by friction, by explosion, by ultrasound, by diffusion, among others); gas welding, etc. Towards the …
-
Parametric Studies Based Mechanical and Thermal Modelling of Spot Welded Joints
… framework for the investigation of spot weld properties and performance. An Inverse temperature measurement approach has been established to predict the thermal history of a spot welded joints using remote thermocouples. This method incorporated the experimental data into an …
-
Robotic Assembly and Contact Force Control
… indispensable in many applications, such as spot welding and painting in the automotive industry. In more complex tasks, such as physical interaction with the environment, position control of the robot might be insufficient due to the fact that it is hard, or too costly, to achieve an …
-
Laser foil printing and surface polishing processes
… comprehensively studied, which include the laser spot welding of foil, laser raster-scan welding of foil, laser cutting of foil, and laser polishing processes. The fabricated free-form parts were demonstrated and own better mechanical properties (micro hardness and tensile strength) than the raw …
Page 1 of 2