Development of icejet-based surface processing technology

• Main Author: Shishkin, Dimitri V.
• Format: Text
• Language: unknown
• Published: Digital Commons @ NJIT 2002
• Subjects: Icejet blasting technology; Ice decomposition; Icewater jet cleaning; Thermal compressive stress; conditions of ice granulation; Mechanical Engineering; Arctic
• Online Access: https://digitalcommons.njit.edu/dissertations/553; https://digitalcommons.njit.edu/cgi/viewcontent.cgi?article=1608&context=dissertations

The objective of the proposed work is to acquire knowledge needed for the development and deployment of manufacturing processes utilizing the enormous technological potential of water ice. Material removal by blasting with ice media such as particles, pellets and slugs was investigated. The ice media was accelerated by entrainment in a fluid stream (air, steam, liquid water, supercritical C02), impact of rotating blades, fluid expansion, etc. The ice-airjet has to replace sand blasting and the ice-waterjet has to replace the abrasive waterjet. Based on these results, technical approaches for surface processing and machining will be improved. A primary advantage of the ice media is movement toward more complete pollution prevention. With this technique, it is possible to eliminate both contamination of the substrate and generation of contaminated waste streams. In addition to the obvious environmental benefits, use of ice media has improved a number of key operational techniques, such as cleaning, decoating, polishing, deburring, drilling, cutting, etc. Production of ice media "just-in-time" at minimal environmental cost constitutes another advantage of ice-based technologies. A key objective of this research is to improve ice blasting so that it is not just feasible, but also technologically and economically efficient. An understanding of process physics and its application to the manufacturing operations are necessary in order to attain this objective. The feasibility and effectiveness of other than blasting ice-based technologies, such as precision temperature control, mixing, forming, etc. was also investigated. The principal issue in the use of the ice abrasives is formation of the ice particles. Two technologies of the particles formation were investigated. One of these technologies involves crushing and subsequent grinding of ice blocks. It is applicable at conditions when ice is readily available, for example at Arctic. Another process involved integration of water freezing and decomposition of the ...