Heatproof Relaxation of Welding Stresses Openwork Designs of Large Size Ultrasonic Field

Abstract

Designed experimental setup, and a prototype of the original devices for athermic relaxation of thermal residual stresses in openwork welded constructions of large dimensions for the rational use of energy high-frequency acoustic (ultrasonic) fields, conducted laboratory studies and pilot tests in real conditions of production. Ultrasonic relaxation when welding thin-walled constructions standard openwork rolled steel profiles 10 large dimensions (up to 3 x 10 m). It has been established that with a decrease in the time of ultrasonic relaxation, the efficiency of its use decreases somewhat. Therefore, in an industrial environment, it is advisable to use the duration of ultrasonic treatment in the range of 0.02-0.04 min per mm of weld length.

Improving the Efficiency of Turning Processing of Heat-Resistant Alloys by Introducing Ultrasonic Field Energy into the Cutting Zone

“…The result of numerous studies performed in various countries was the possibility of practical implementation of dimensional machining with ultrasonic testing by using special devices and installations for applying the energy of the ultrasonic field to the workpiece (tool, coolant, machine parts and tooling, etc.) [5][6][7]. At present, DMG MORI has developed and mass-produced a line of 18 models of the ULTRASONIC series machines, in which a device for superimposing ultrasonic cutting on the cutting tool is integrated in the design of the spindle unit.…”