Lyuban (metal 8 mm)
With a small layer of lubricant, the presence of minor damage to the threads of the bolts caused by the forced planting of them during insufficient fitting, it is necessary to increase the torque by 25-36%, compared with its calculated value. Further, the report draws attention to the fact that the value of the preliminary voltage also depends on the nature of the tension process, especially in the case of an interruption in the process with a sufficiently high preliminary voltage, but still a smaller calculated value. Stoves for the bath of the Tsar-Peches trademark on the site
It is noted that when the tension process is renewed under these conditions and it is brought to the required value, the preliminary voltage of the bolts no longer increases. At the same time, there are other data showing that with a large number of bolts at the junction, the tension process, which already provides about 60% of the required preliminary voltage, does not affect in any noticeable way after the resumption of the interrupted process. Sigmatic experiments in order to establish a quantitative assessment of this phenomenon were not carried out. The results of testing of two components (in full size) of the farm of the railway bridge with welded elements and mounting connections on high -strength bolts were reported. The purpose of the tests was to identify the magnitude of the change in the clearance between the slants and the style in the process of preliminary tension of the bolts. In the compounds on high -strength bolts with paired overlays under the influence of mobile loads, residual displacements are noted at stresses in the rods of the bolts reaching the permissible.