【摘要】 针对再制造液压缸筒表面厚重油漆难以去除的问题,采用超声熔盐复合清洗技术进行有效清洗。影响复合清洗效果因素较多,选择清洗温度和超声功率进行研究。通过中心复合试验法,以清洗周期和3.5min去污率作为评判标准,拟合试验数据建立回归方程和响应面模型,探究清洗温度和超声功率的影响作用。结果显示:随清洗温度升高,熔盐表面张力变小,化学反应速率提高,清洗周期变短,清洗能力增强;超声功率增大,清洗场内振荡作用变强,使熔盐加速流动,场内各部分温度趋于一致,加速反应进行,增强清洗能力。因此随清洗温度和超声功率提高,复合清洗去除油漆能力增强。通过试验确定超声熔盐复合清洗去除油漆的最优参数为清洗温度(326～336)℃,超声功率为最大值1440W,最优参数下清洗周期为4min,清洗3.5min时去污率为97.5%。更多还原

【Abstract】 Aiming at the problem that the thick paint on the remanufactured cylinder surface was hard to remove,ultrasonicmolten salt compound cleaning technology was used to clean the paint. There are many factors that influence the effect of compound cleaning,The cleaning temperature and ultrasonic power were chosento study. By means of the central composite experiment method,the cleaning cycle and 3.5 min removal efficiency were chosen as criterions,and the regression equation and response surface model were established to explore the effects of cleaning temperature and ultrasonic power. The results showed that the surface tension of molten salt decreased and chemical reaction rate accelerated with cleaning temperature increasing,leading to shorter cleaning cycle and stronger cleaning ability. With ultrasonic power increasing,the oscillation effect became stronger,and molten salt flow accelerated,meantime the temperature of each part tended to be consistent,so the reaction accelerated and the cleaning ability was enhanced. Therefore,with the cleaning temperature and ultrasonic power increasing,the compound cleaning ability is enhanced. The optimal parameters are the cleaning temperature of(326～336)℃and ultrasonic power of 1440 W. The cleaning cycle is 4 min and the 3.5 min removal efficiency is 97.5% on the optimal parameters.更多还原