SU332883A1 - METHOD OF WINDING STRIPS ON THE DRUM MOTOR - Google Patents

Description

Methods are known for winding a bar across a drum, including tensioning a band.

With the exclusion of additional funds for the loss of stable and biocth internal turns of the coil after removing it from the drum of the winder according to the proposed method, the first five turns of the coil are produced by increased carbonation, and carbon steel for 2-2 , 5 times more of those nologicheskogo, with a follow-up, them a gradual decrease in the grooming to a technical 50-100 rpm drum motalkkn.

FIG. 1 is a diagram illustrating mehavdism on a coil with constant tension; in fig. 2 - the same with tension increase at the beginning of winding.

When a strip is wound with constant tension, each wound coil receives an elongation proportional to the length of the coil, and the elongation of the coils is expressed by the trapezoid Abwg, where the extension of the outer coil with a radius R paiBHO vg and the elongation B1 of the inner coil.

After removing the roller from the drum, the inner turns turn into a state of compression, counterbalancing the pressure of the outer extended turns.

but ab, if l hedgehog is larger than a certain critical value / cr, then a loss of stability occurs.

With naiMOTKe with tension of the first turns, large technological and with subsequent gradual decrease of tension to 1 o. Terminal, extension of internal turns /. ab more than in the nerve case. After the coiler is removed from the reel drum, these coils receive a greater radial movement, thus a large unloading of the coil and a decrease in the compression of the inner coils occur.

Selection of basic winding parameters: tension values at the beginning of winding and numbers

turns, on which there is a reduction in the pressure before the technological is produced

by calculation.

To do this, it is necessary to specify the regime above N | And tension in the beginning of the winding over the given technological tension and to determine the stress in the coils of the coil, taking into account the elastic deformation of the bar-ban and coil.

Then, excluding the force of the reaction of the drum, which corresponds to the unloading of the roll from the drum, it is neo bho | dimo to calculate the stress variation in the coil turns.

their stability as something of nosteel rings, loaded with external pressure.

An increase in the tension of the first rolls is made until the results of the calculation show that the loss of stability will not occur.

Subject of the invention. A method of winding a strip on a drum of a winder, which includes tensioning a strip, characterized in that, in order to eliminate additional CpetucTB to prevent buckling of the yutren.NILE coils of the coil after removing it from the Motalvi drum, winding the first five ITWORKS is made LEARNED

tension, for example, for carbon steels is 2-2.5 times more technopoly ,. with the subsequent gradual decrease in the tension of the Zhevi to the technological one at 50-100 rpm of the bar-bana winder.

Rig. 2