In the master's thesis we studied the problem of weld spatters, which occur during the process of projection welding of stamping parts made of high strength steel. A challenge is that spatters occur on functional surfaces that are defined to be spatter-free. At first we examined the problem of weld spatters in projection welding process. Since the welding parameters turned out to be appropriate, we continued the investigation of the cause of spatters formation due to inadequate execution of the welding machine and inappropriate manipulation of the part into welding machine. By measuring the accelerations on the electrode, we confirmed the hypothesis about the cause of the spatters and created the concept of a new gripper for a manipulative robot. We tested and analyzed projection welded samples on the implemented prototype gripper using the quality testing methods for resistance welded joints. We found out that the introduced changes in the electrode and the clamping method of the welding part during the process of welding make it possible to produce high-quality products with a markedly reduced number of defects on the product.
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