device for the manufacture of drallarmen strands, cables or ropes

摘要

Method and apparatus for making strands, wire cables or stranded cables, with or without a core wire or core strand, which are either free from twist or have a directed twist when free from tension, by spiral preforming the wires or strands, wherein wires or strands move forward at a distance from an axis about which they are simultaneously rotated, and each wire or strand is drawn over one or more edges towards a twisting station located on the said axis, the wires or strands being permanently deformed at the said edges which displace their points of contact on the wires or strands once around the periphery of the wire or strand for every one revolution of the wire or strand about the said axis. The apparatus includes a preforming mechanism comprising two or more discs disposed one behind the other, each of the discs being provided with at least one circular row of bores, each of which rows in one of the discs contains the same number of bores as a corresponding row in the other disc or discs, the bores in one disc being offset by an adjustably predetermined amount with respect to the bores in the preceding disc, and the radii of curvature of the edges of at least one row of bores being so small that wires or strands passing through the bores are permanently deformed.