Research On Short-pulse Laser Processing Performance Of Damping Rubber Materials

Short pulse laser has strong stability, fast processing speed with high efficiency, small heat effect, higher machining precision advantages, especially suitable for industrial application. Damping rubber materials because of its excellent physical and mechanical properties, has been widely used, common in automobile sound absorbing device, vibration damping device, seals, rubber sheet and wear-resistant parts, etc. In order of the low-damping rubber material conventionally machining accuracy, processing quality is difficult to precisely control and other shortcomings, the use of laser processing methods should be one way to solve these problems.Experiments have been conducted in order to evaluate the interactions of single short-pulse laser pulses with damping rubber materials. Damage of the material was observed and analysis was carried out to determine the mechanism. The results show that the heat generated by the laser energy in the process of laser etching is mostly focused on the spot area due to the low heat transfer coefficient of damping rubber material. As a result, Thermal cracking and the perception of ageing of the rubber is apparent in the area of the laser spot giving the appearance of an ablation generated honeycomb in the holes from the laser etching. The diameter and depth of the hole are increased with increasing energy of the single pulse and the ablation state of the rubber in the holes is more significant. The damage threshold of 10 ns single laser pulse on the damping rubber material was calculated from the ablation diameter and depth as determined experimentally. The result is very close, about 0.6J/cm2, explain the experimental data is accurate and reliable.Using the finite element method to simulate a single pulse process damage damping rubber material through APDL language in the manner defined command stream Gaussian laser heat load. Simulation results using the recalculated single pulse damage threshold of the material, in good agreement with the experimental results, the actual description of experimental methods and measurements used in this paper is effective and reliable.Through the observation of material ablated aperture changes under different laser pulse width, pulse to analyze the impact of rubber materials. The results showed that the smaller the pulse width, the larger the aperture ablation, the deeper the ablation depth, the smaller the thermal effect of ablation, the sharper the edge profile ablation. Under the same conditions, preference should be given a short pulse of laser materials processing parameters.According to the damage threshold of multiples, changing the energy density of laser drilling experiments, found that the energy density of 5~6 times the damage threshold, damping rubber materials processing effect is more ideal. Combined with the calculation method of damage threshold, under the condition of different pulse width, can draw lessons from the method to select the proper processing and laser energy density, for application of damping rubber material of the other processing that provides a good support.