Abstract:
Изобретение может быть использовано при производстве преднапряженной и закладной канатной арматуры. Арматурный канат состоит из центральной проволоки (1) и расположенных вокруг нее по спирали повивочных проволок (2) внутреннего слоя и повивочных проволок (4) внешнего слоя, каждая из которых имеет участок поверхности, являющийся частью наружной поверхности каната. Расстояние между поверхностями повивочных проволок внешнего слоя (4) составляет не менее половины их радиального размера сечения, при этом на обращенных друг к другу участках поверхности смежных проволок выполнены непрерывные по длине спиральные грани (5), а участок поверхности каждой из повивочных проволок внешнего слоя (4), являющийся частью наружной поверхности каната, имеет по меньшей мере одну обжатую часть (6) непрерывную по всей длине указанных проволок. Представлен также способ изготовления такого каната, состоящий из этапов, на которых изготавливают проволоки круглого сечения, свивают проволоки с помощью канатовьющей машины с вращающимся ротором, осуществляют пластическое обжатие свитого каната путем деформации повивочных проволок в по меньшей мере одном роликовом калибре, вращающемся относительно оси каната, подвергают обжатый канат термомеханической обработке. Существенно увеличивается выносливость каната, при одновременном обеспечении высокого сцеплением с бетоном в продольном направлении и в направлении ввинчивания.
Abstract:
A composite hybrid cord(l) comprising a core comprising of a first bundle of synthetic filaments (2) having a filament tenacity of from 10 to 40 grams per decitex and a plurality of cabled strands83) helically wound around the core, each cabled strand comprising of a plurality of metal strands (4) helically wound around a center second bundle of synthetic filaments (5) that have a filament tenacity of from 10 to 40 grams per decitex. The ratio of the largest cross sectional dimension of the first bundle of synthetic filaments (2) to the largest cross sectional dimension of the second bundle of synthetic filaments (5) is from 1.5:1 to 20:1. The metallic filaments of the cabled strands have an elongation at break that is no more than 24 percent different from the elongation at break of the synthetic filaments of the first and second bundles.
Abstract:
A strata support system that provides support and balance to a rock mass and reacts to movement of the rock mass. The strata support system includes a borehole that is drilled into a surface of the rock mass. A resin is disposed in the borehole to secure a cable within the borehole. An anchor cable bolt assembly having a plurality of strands that are twisted together to form the cable is inserted into the borehole. At least one of the plurality of strands includes an interrupted outer surface that is defined by a plurality of spaced indentations. The plurality of spaced indentations are formed along the length of the strand and provide for a plurality of surface contours to enhance engagement of the anchor cable bolt with the resin.
Abstract:
Metal cord comprising at least one preformed elementary metal wire, said metal cord having: - an elongation at break, measured on the bare cord, higher than or equal to 3%, preferably of from 4% to 6%; an elongation at break, measured on the rubberized and vulcanized cord, which differs of an amount not higher than or equal to 15%, preferably of from 2% to 10% with respect to the elongation at break measured on the bare cord; a part load elongation (PLE) , measured on the bare cord, higher than or equal to 0.4%, preferably of from 0.5% to 1.5%; a part load elongation (PLE) , measured on the rubberized and vulcanized cord, which differs of an amount not higher than or equal to 15%, preferably of from 0.5% to 10%, with respect to the part load elongation (PLE) measured on the bare cord.
Abstract:
A steel structure adapted for the reinforcement of elastomers, said steel reinforcement comprising one or more steel filaments (10). At least one of said steel filaments (10) is provided with a first crimp and a second crimp. The first crimp lies in a plane that is substantially different from the plane of the second crimp. Applying both crimps can be done in an efficient way by means of two pairs (12, 14) of toothed wheels which are not externally driven. By means of these crimps it is possible to obtain steel structures with an increased penetration of rubber or with an increased elongation at break.
Abstract:
A compact, high elongation steel cord which provides a great elongation at break, small wear at twisting and good rubber permeation and is easy and efficient to produce by twisting once; and a radial tire using this high elongation steel cord as a reinforcing material which has high anti-cutting properties and good riding comfort and which is not likely to generate a separation phenomenon. The steel cord has a l x n construction in which three or more strands are twisted together in the same direction and at the same pitch and an elongation at break of 5 % or more. The steel cord has a spiral compound construction in which three or more strands which are waved in a spiral fashion at a pitch shorter than the pitch for twisting the cord are twisted such that a P/D ratio of twisting pitch P to outside diameter D of the cord falls within a range of 8 to 15 and elongation at 35 kgf/mm and 70 kgf/mm fall within 0.71 to 1.00 % and 1.18 to 1.57 %, respectively.
Abstract translation:一种紧凑,高伸长率的钢丝绳,其断裂伸长率大,扭曲磨损小,橡胶渗透性好,扭曲一次容易高效; 以及使用该高伸长率钢丝帘线作为增强材料的子午线轮胎,其具有高抗切割性和良好的乘坐舒适性,并且不可能产生分离现象。 钢帘线具有1x××××××××××××××××××××××××××××××××××××××÷。。。。。。。。。。。。。。。 钢帘线具有螺旋形复合结构,其中以螺旋方式以比用于扭绞帘线的间距短的间距螺旋形地旋转的三根或更多根股线被扭曲,使得扭转节距P与外径D的P / D比 帘线落在8〜15的范围内,35kgf / mm 2和70kgf / mm 2的伸长率分别在0.71〜1.00%和1.18〜1.57%之间。