摘要:
An apparatus and a method for processing string materials, particularly electric conductors, includes at least one first string material guide for conveying the string material along a path of movement to a processing apparatus and including at least one second string material guide located between the first guide and the processing apparatus. The first guide means further includes at least one guiding element by which self-twisting of the string material about the longitudinal axis thereof may at least be impeded. The second string material guide includes another guiding element which is rotationally positioned about an axis arranged at a given angle with regard to the path of movement and is driven by a driving apparatus. The guiding elements are rotated either continuously or intermittently.
摘要:
A wire-drawing method comprises providing a rod comprising a wrapped sheet, wherein the sheet comprises a plurality of copper layers and a plurality of graphene layers; extracting an inner layer of the wrapped sheet from the rod to form a spiral; and forming a wire by feeding the spiral through an opening of a die unit.
摘要:
An improved communications cable and a method of making the same so as to minimize cross talk between units within the cable, in which a plurality of SZ stranded units are twisted to form groups which are then formed into layers so that adjoining units in any one layer have a different distribution function of length of lay and/or distance of reversal points of twist directions and with adjacent units in one layer similarly have different distribution function of length of lay and/or distance between reversal points than units in adjacent layers.
摘要:
An apparatus and a method for processing string materials, particularly electric conductors, includes at least one first string material guide for conveying the string material along a path of movement to a processing apparatus and including at least one second string material guide located between the first guide and the processing apparatus. The first guide means further includes at least one guiding element by which self-twisting of the string material about the longitudinal axis thereof may at least be impeded. The second string material guide includes another guiding element which is rotationally positioned about an axis arranged at a given angle with regard to the path of movement and is driven by a driving apparatus. The guiding elements are rotated either continuously or intermittently.
摘要:
Apparatus for stranding elongated elements into a bundle of reversely twisted strand sections includes a rotating accumulator drum, a rotating winding flyer at the first end of the drum, and a rotating unwinding flyer at the second end of the drum. A guide plate and collector die guide the elements into the winding flyer, and a twist blocking device guides the twisted strands out of the unwinding flyer. A first twist of the bundle is produced by the winding flyer in a zone between collector die the winding flyer. A second reverse twist is produced by the unwinding flyer in the zone between the unwinding flyer and the twist blocking device. The winding flyer, the drum and the unwinding flyer rotate around a common axis, in the same direction, but at different speeds which change in alternating winding phases. The speed of the flyers and the drum are different from each other, but constant within the particular winding phase. The speeds of the flyers and drums are selected so that the strands are drawn through the apparatus at a predetermined speed and so that twisting in reverse direction occurs in alternating sections as the strands are drawn through the apparatus. The speed of rotation of the flyers and drums also determines the tightness of the twist. Durations of the periodically changing speeds are preferably selected such that the length of the bundle stranded in one direction is equal to the length stranded in the opposite direction.
摘要:
A device (1) is used for twisting rope-shaped material (15), particularly of a larger cross section, with changing twist direction (SZ), consisting of a rotor (4) that changes direction and/or RPM, with two opposing chain drives (7) for the material (15), which are parallel to the rotor axis along an endless path. The material is gripped, guided and subsequently released by collet chucks along a prescribed pathway determined by a pressure rail (16). The collet chucks (14) are additionally attached to the chain drives (7) outside of the pathway, and are force-guided along the endless path.
摘要:
A method for precisely controlling the tension of a cabling assembly includes applying a triple-feedback-loop to allow the manufacture of a large number of cable pairs. The control loop may be used with any take-up and payoff assemblies and compensate for wide variations in take-up reel weight, cable weight, process line speeds, and pay-off tension. One of the loops of the triple-feedback-loop is under-damped and unstable and allows the control loop to compensate for the wide variations without changing control systems or cabling apparatus.
摘要:
Rotating winch for stranding lines comprising a hollow rotor (1) wherein a motor (9) suitable for rotating a drawing drum (12) around an axis perpendicular to the axis of rotation of the rotor (1) is arranged, the external lateral surface (21) of said drawing drum (12) having a substantially concave profile which is included between two containment walls (22, 22′). Said profile is preferably symmetrical and has a substantially constant radius of curvature, equal to about the double of the distance between the containment walls (22, 22′) and to about ⅔ of the external diameter at the center of the drawing drum.
摘要:
An improved twisting device for imparting a twist to the stranding elements of electrical cables, which twist alternates from section to section, in which two fixed twisting heads have installed between them a pair of movable twisting heads on a common frame which is moved back and forth thereby forming a pair of accumulators of alternatingly variable size as the movable twisting heads are moved back and forth.
摘要:
A method and apparatus for precisely controlling the tension of a cabling assembly is described. The control loop includes a triple-feedback-loop to allow the manufacture of a large number of cable pairs. The control loop may be used with any take-up and payoff assemblies and compensate for wide variations in take-up reel weight, cable weight, process line speeds, and pay-off tension. One of the loops of the triple-feedback-loop is under-damped and unstable and allows the control loop to compensate for the wide variations without changing control systems or cabling apparatus.