DE1075694B - Highly flexible strand for electrical welding cables or other high-current lines - Google Patents

Description

In assembly line production, on traveling tables, machine tools and in similar cases Electrical devices (welding, soldering, testing devices, electromagnets, etc.) are used, their electrical supply line sometimes experienced many thousands of bends within one work shift. This unusual Stress that hardly occurs in other areas of technology causes very rapid stresses Wear on the cables and therefore a service life of often only a few weeks or months. Investigations have shown that the rapid wear and tear of the cables is essentially due to wire breaks in the copper braid. The strands usually consist of concentrically stranded Wires or wire groups (partial strands); there is a slight shift at each bend in the line of wires or wire groups against each other, the stranding layers constantly drag against each other, wear out at the points of friction until the wires break completely. But has Once individual wires have broken, the line quickly becomes unusable. The wear and tear of the Litz wire is particularly accelerated, even if there are additional force field effects in the line appear. So z. B. in auto body ^ construction usually used spot welding equipment at which in immediate consequence a large number of power surges with thousands of amperes operational occurrence. The extraordinarily large force field collision effects that are already externally associated with the Line become visible, naturally also have a sudden effect on the wire layers of the cable strands.

It is known from wire rope technology for conveying, in tensile wire ropes in the normal stranding process as a core or to fill gaps in stranding fiber strands, mostly in combination with lubricants, to be run in. This measure improves the flexibility and flexibility of the rope, but cannot be used as an effective protection against wear in the long run apply, because after prolonged use of the rope, these shims reduce their volume and then the wire layers no longer reliably distance each other. In the case of overhead cables, it has also been suggested that to arrange thick and tightly compressed fiber layers between the stranding layers. All these aforementioned fillers would be transferred to a movable device supply line, its diameter enlarge undesirably and make them unwieldy, especially if it is, such as. B. at Welding cables, large conductor cross-sections. To a perfect solution to the task especially if additional strengths are required

for electric welding cables

or other power lines

Applicant:

Dipl.-Ing. Robert Höhn,
Neuss / Rhein, Further Str. 159

Dipl.-Ing. Robert Höhn, Neuss / Rhine,
has been named as the inventor

If there are any changes in the strand structure, more appropriate and effective arrangements of the upholstery are required.

The invention relates to a highly flexible, finely stranded strand, in particular for welding cables. At a Such a strand, the invention consists in that between the within the stranding directly Litz wires or wire groups lying next to one another or on top of one another are thin intermediate layers that only slightly increase the cable diameter are made of a wear-resistant and rot-proof, non-fibrous material that the strand parts endangered by frictional or impact forces or both types of forces in the form of open parts Preferably separate the layers from one another on all sides. In contrast to the known, will So the filling of stranding gaps with fiber material is considered pointless and dispensable and the solution to the task at hand is seen in the actual upholstery material to distance itself to use adjacent strand parts endangered by internal forces.

For this purpose, a padding material based on polyamide, polyurethane or similar, or also a copolymer, e.g. B. polyvinylidene chloride and vinyl chloride, their high wear and tear Abrasion resistance are known, proven to be particularly advantageous, in the form of tapes or Threads, the latter expediently injected as monofilament round threads. This material, as an open coil or open braid applied, z. B. for distancing the individual stranding systems, all or individual strand groups or any combination thereof can be used.

The open arrangement of the upholstery layers means that in the case of artificial cooling (e.g. with Welding cables) the flow of coolant does not

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handicapped, rather relieved. Will bed water-cooled Lines split the line within the cooling water hose into several sub-conductors, see above Each sub-conductor also receives this cushion in one of the specified shapes, so that the deforming impact effects the field forces cannot have a detrimental effect.

Further advantageous developments' of the invention can be seen from the drawing, in which the invention is explained using two exemplary embodiments. The embodiment is in each case a strand for electrical lines is based, which consists of a core strand 1 and two overlying it Layers 2 and 3 are made up of partial strands.

In the embodiment according to FIG. 1, an open helix 4 is for the core strand 1 and for the inner layer 2 an open ribbon braid 5 as Upholstery chosen.

Fig. 2 illustrates a further modification of the invention, in which the core strand 1 and each ao second part strand of the outer layer 3 are without padding or intermediate layers, while all part strands of the inner Layer 2 and one around the other part of the outer layer 3 with an open braid monofilament, solidly sprayed round threads 7 are surrounded, so that despite the only partial use of However, padding material in the partial strands cannot rub metal on metal at any point.

As mentioned, the material for the intermediate layers 4 to 7 is preferably small strips or threads made of polyamide, polyurethane or other suitable wear-resistant materials, e.g. B. copolymers, Find use.

Claims (2)

PATENT CLAIMS: 1. Highly flexible stranded wire for electrical welding cables or other high-current lines, characterized in that that between the directly adjacent or superimposed within the stranding Partial strands or wire groups are thin intermediate layers that increase the cable diameter only insignificantly from a wear-resistant and rot-proof, non-fibrous material are provided, which by friction or Strands endangered by impact forces or both types of force, preferably in the form of open layers distance from each other on all sides. 2. Stranded wire according to claim 1, characterized in that the intermediate layers are made of a material on a polyamide, polyurethane or similar basis or made of other suitable wear-resistant Substances, e.g. B. copolymers, in the form of tapes or preferably injection-molded monofilament Threads exist as an open helix (4) and / or as open braids (5, 7) are applied. Pamphlets considered;
U.S. Patent No. 2,075,996;
French patent specification No. 489 342. 1 sheet of drawings © 305730/342 2.60