Design of Precision Parts Cleaning Equipment Using Supercritical Carbon Dioxide Assisted with Ultrasound

Gao Gongru 1 , Han Bin 1 , Zhang Xuechun 1 , Hu Dedong 2 , Ning Zhaokuan 2 , Zhang He 2 (1.Shandong Changlin Machinery Group Co. Ltd, Linshu City, Shandong Province 276715, China; 2. College of Electrome- chanical Engineering, Qingdao University of Science & Technology, Qingdao City, Shandong Province 266061, China)

precision parts; supercritical carbon dioxide (SC CO2 ); ultrasonic; cleaning equipment

Conventional cleaning technology and equipments could hardly satisfy effective cleaning of slit micropores from the precision parts because of high surface tension of the water solution, and the process of drying is complex, but ultrasound-assisted cleaning technology with supercritical carbon dioxide (SC CO2 ) would solve these problems. SC CO2 have characteristics of low surface tension, fast moving, high dissolubility, strong diffusivity, no chemical additives and recyclable use. The precision parts would widely use this cleaning technology. In the article a ultrasound-assisted cleaning equipment of precision parts with SC CO2 is proposed, including the cylinder, the internal jacket, the ultrasound transducer, the material framework, the magnetic drive equipment, the head and the catch hoop, and the equipment could use the cleanout of SC CO2 , ultrasonic oscillation and rotating the cleaning parts together, it is possible to achieve waterless cleaning of precision parts.