Ultra-Fast Portable Metallic/Concrete Plate Cutting
Final rept. 28 Apr-28 Oct 99
CERAMIC AND MATERIALS PROCESSING INC CLARENCE NY
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The goal of this report is to develop and evaluate methods of ultra-high and high-rate cutting technologies for use in military and civilian realm. The information presented in this report reveals that defeating exposed rebars, steel reinforced concrete walls, steel encased concrete doors, and steel plate doors is within reach of current technologies. We did not analyze any exotic solutions but proposed to use or modify current technologies through clever engineering. Oxyfuel unit including 0.5-gallon gasoline tank with cutting torch assembly and 8 small cylinders of oxygen represents a typical portable unit. The overall weight of the package is 140 lbs. A team of two men can transport this package. The capability of this package is cutting 400 rebars 12 inch thick or making a cut 180 inches long on a plate 2.64 inches thick. A typical portable cutting unit based on thermal lance concept has an overall weight 20 lbs., this includes handle and burning bar 3 lbs and a small oxygen tank 16 lbs.. Oxygen consumption is typically 4 ft3min. A small gas cylinder can support 4 min. of cutting activity. A small package containing 8 small cylinders weight 140 lbs. is capable of cutting 48 steel rods of diameter 2.94 inches. The same package can pierce in a 1.6 inch thick concrete plate 37 holes of diameter approximately 0.8 inch. Purity of oxygen is extremely important for fast cutting. A detailed analysis revealed that an optimum purity of oxygen is 99.5.
- Ceramics, Refractories and Glass
- Metallurgy and Metallography