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1 &w/58)
SYSTEMATIC
ABSTRACTS
459
7, SURFACES AND SURFACE TREATMENT 7.1. General (no abstracts) 7.2. Steel (no abstracts) 7.3. Grinding The Grinding of Titanium Alloys. C. T. Yang and M. C. Shaw. ASME, actions, v. 77, July 1955, p. 645-660
Tram-
A study of the influence of a wide variety of operating and grinding-wheel variables reveals the most important quantities to be grinding-wheel speed, type of abrasive, and grinding fluid. Table, graphs, diagrams, micrographs, photographs.
8. MACHININGAND METAL WORKING New Method for Evaluating Coolant Efficiency. 1:. Eug&ne. Micvotecnic (English Ed.), v. 9, no. 2, 1955, p. 70-80. Evaluation of coolant effect in machining operations may be satisfactorily made through measurement of specific tool abrasion. Diagrams, tables, photographs, graphs. 4 ref. Neue Erkenntnisse iiber den Verscbleiss der Werkzeuge beim F&en van Baustahl. New Information on the Wear of Cutters in the Milling of Structural Steel. H. Opitz and K. H. FrBhlich. VDZ Zeitschrift des Vereines deutscher Zngenieure, v. 96, no. 25, Sept. I, 1954,p. 822-830.
Effect of initial cutter-to-steel contact, machining conditions, and type of wear; instruments for measuring and recording photographically and graphically cutter wear, force and temperature of cutting, and vibrations. Table, diagrams, graphs, photographs, micrographs. 12 ref. Low Temperature Cooling, A Means of Increasing Cutting Tool Life. G. Pahlitzsch. Microtecnic (English Ed.), v. g, no. 2, 1955,p. 65-69. Tests indicated a 42% extension of tool life and an increased saving in manufacturing and tool costs. Graphs, photograph.