摘要：During molten salt cleaning of remanufactured 27SiMn hydraulic support column,oxidation occurs on the surface of metal *** results in a change of the surface roughness of metal substrate after cleaning,which affects subsequent remanufacturing *** decrease the effect is very *** paper analyzed the oxidation mechanism of molten salt cleaning,explored the oxidation reaction that occurred during cleaning,and determined the key process parameters of cleaning that affecting oxidation *** using central composite experimental design method and taking surface roughness variation of 27SiMn steel samples before and after molten salt cleaning as response variable to optimize the key process parameters,the optimal parameters of molten salt for cleaning remanufactured 27SiMn hydraulic support column could be *** results show that the oxidation reaction of cleaning paint dirt can protect metal substrate from oxidation to a certain extent,and cleaning temperature and placement depth of metal substrate have a direct impact on the degree of oxidation *** the cleaning temperature is 300℃and the distance between paint dirt and free surface of molten salt is 0.5 times the height of the parts,the surface roughness variation is ***,the cleaning quality will be improved under such parameters.

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%。

摘要：本文针对一种输入(电磁系统)、传导(衔铁部分)、输出(接触系统)处于同一水平面结构的某型号磁保持继电器设计进行论述,通过产品结构分析,进行了论述、计算和设计,最后经过样品装配、测试及试验验证了该产品设计的合理性和正确性。