Ultrasonic tool for the assembly and disassembly of screw joints

Abstract

The relation between four dimensional SO(4) pure Yang-Mills theory and the gravity is discussed. The functional integral for Yang-Mills theory is rewritten in terms of the gravity metric and Riemann tensors. This relation is shown to provide also a simple way to derive the linear potential resulting from the average Wilson loop in the pure Yang-Mills theory.

Influence of transverse ultrasonic vibrations on the efficiency of threaded joint assembly

“…Previous studies show effectiveness of the use of ultrasonic vibrations at the stage of assembling a threaded joint [7,8,9,10]. For example, in work [7] it is shown that superposition of ultrasonic vibrations of longitudinal polarization at high assembly forces is most effective.…”

“…This value of TC is not normalized, which does not allow to speak about applicability of the data from [7] for the real process of assembling joints. In [9,10], ultrasonic wrenches are described, the action of which is based on longitudinal and torsional vibrations. These devices work for both assembly and disassembly of joints, however, they are large enough that they cannot be used in hard-toreach places, for example, when the distance along the assembly axis is limited and openend keys are used for assembly.…”