Accession Number : AD0713455

Title :   INVESTIGATION OF THE EFFECTIVENESS OF ULTRASONIC VIBRATIONS OF THE TOOL WHEN MACHINING HEAT-RESISTANT AND TITANIUM ALLOYS,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Nerubai,M. S.

Report Date : 20 AUG 1970

Pagination or Media Count : 12

Abstract : The study, employing forced ultrasonic radial vibrations, was carried out in a specially built set-up on maintaining a constant vibration frequency of 21 kilocycles. Analysis of the findings revealed that in this event machining is accompanied by a marked decrease in the longitudinal shrinkage factor (presence of thinner chips) as well as by the absence of burrs. Then the tool feed rate exceeds 0.4 mm/revolution, the temperature during conventional machining was the same as during machining accompanied by the application of ultrasonic vibrations, but in both cases burrs were absent. Depending on the vibration amplitude ultrasonic vibrations may raise or lower the mean temperature in the machining zone. Thus the excitation of ultrasonic vibrations of large and given medium amplitudes raises the temperature in the machining zone for VTZ-1 titanium alloy, particularly in the presence of low tool feed rates, while in the range of double amplitudes 0.003-0.006 mm it lowers the temperature by 40-60 degrees centigrade. Similar findings were made for E787 and St.45 steels. (Author)

Descriptors :   (*MACHINING, *ULTRASONIC RADIATION), ULTRASONIC PROPERTIES, HEAT RESISTANT ALLOYS, HEAT RESISTANT METALS, TITANIUM ALLOYS, USSR, CUTTING TOOLS, EFFECTIVENESS

Subject Categories : Fabrication Metallurgy
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE