主要探讨了液态阻尼材料(LASD)在汽车涂装应用过程中的常见问题及解析,如机器人支架与车身干涉影响喷涂,材料喷涂后湿膜放置出现开裂和胶枪枪嘴挂丝引发的品质不良等。结果发现:采用120°的支架有助于规避机器人喷涂过程中与车身的干涉,满足喷涂规格和提高喷涂质量;LASD湿膜放置产生的开裂会降低涂层的阻尼性能,与不开裂相比,露底开裂的涂层的损耗因子会下降15.4%~27.8%,通过优化配方和加强现场管理可有效解决开裂的问题;另外,喷涂过程中胶枪枪嘴挂丝导致的不良与材料生产工艺控制有较大关系。

The common problems and analysis of liquid damping material(LASD)in the application process of automotive coating are discussed.For example,the interference between the robot bracket and the body affects the spraying,the cracking of the wet film after the material is sprayed and the quality caused by the hanging of the glue gun nozzle.It was found that the use of the 120°bracket helps to avoid interference with the vehicle body during the robot spraying process,meeting the spray specifications and improving the spray quality.The cracking caused by LASD wet film placement will reduce the damping performance of the coating.Compared with no cracking,the loss factor of the cracked coating will decrease by 15.4%-27.8%.The problem of cracking can be effectively solved by optimizing the formulation and strengthening the on-site management.The defects caused by the hanging of the glue gun nozzle during the spraying process have a great relationship with the material production process control.