INVESTIGATION OF THE EFFECTIVENESS OF ULTRASONIC VIBRATIONS OF THE TOOL WHEN MACHINING HEAT-RESISTANT AND TITANIUM ALLOYS,
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 20, 1970
- Accession Number
- AD0713455
Entities
People
- M. S. Nerubai
Organizations
- National Air and Space Intelligence Center