AN IMPROVED STAND-ALONE SYSTEM FOR FATIGUE TESTING OF ROUND SAMPLES DURING ROBOTIC LASER PEENING PROCESS WITH MINIMUM BENDING OF THE SAMPLES

摘要

The invention relates to an improved stand-alone system for fatigue testing of round samples during robotic laser peening process with minimum bending of the samples, the round sample provided with a protective layer that absorbs the laser energy to restrict rapid expansion including generation of plasma, a tamping film of high dielectric constant such as a water film of high thickness allowed to flow-over the sample to generate a plasticizing effect on the sample due to transfer of the laser energy in the form of pulses with pre- determined pulse widths, contained within the water film in the form of shock waves, the system being attachable to the robotic laser peening machine, the improvement is characterized in that a holding device is attached at the sixth axis of the robot, and comprising ; a bearing means to permit stepwise rotation of the sample in correspondence to the laser peening pulse frequency; and a spring loaded support member provided at the free standing and; a connecting rod to restrict rotation of the device by locking fixture movement with the robot still allowing rotation of sample on 6th axis with bearing arrangement for continuous laser-peening.