The strand consists of many single wires.Generally speaking, the single wire that forms bundle strand is much and thin, not only increased the softness of electric wire and cable, still improve the reliability that the line connects.Some wire and cable conductors do not require a large cross-section, but they are also twisted in order to have better flexibility or high reliability.
In order to make a single wire with a certain helix Angle (or pitch) for wire bundling or stranding, the equipment must meet the following requirements:Another is to make the stranded products for straight forward movement.By changing the coordination of these two kinds of motion speeds, the helix Angle can be adjusted to make the strand or bundle produced conform to the structural requirements.
The composition of the strand machine and the beam machine is basically the same, which is composed of the release, traction, wire and wire, drag and control system and other main parts.In addition, also attached to the parting board, and line (also known as the pressure die), meter device.
The stranding specification that the wire machine produces is bigger, when stranding is made except the center is 1 outside singlet, the put out line of other singlet dish is put in put out line part (be like Hank cage), make singlet around the center singlet through its rotate form stranding layer.According to the number of stranded layers and the number of single strands in each layer, the general winder is equipped with several (several sections) of the winding part that are rotated respectively, so that it can be made into twisted wires with different directions in each layer. Therefore, it is particularly suitable for the production of twisted wires with concentric layers.The wire bundling machine produces the wire bundling with small specifications, which forms the wire bundling by the rotation of the part basket or the rotating body.As a result of the motion of machine of bundle line is in receive line part, change speed mechanism is installed in the basket that turns in, the position is restricted, this decided to bundle line machine to be able to make only a twist, specification is lesser product, but the odd line root that bundle makes is numbered, can configure flexibly according to need.
The quality of twisted or bunched wire, on the one hand, depends on the quality of single wire material and additional material itself, on the other hand, also depends on the skein or bundling process.There is a direct relationship between the equipment and the structure, the section and the outside diameter, the number of single wires, the thickness of single wires and the manufacturing length of twisted products.If it is a concentric layer of stranded wire, should first consider the number and size of the winder to adapt to it, and then consider the direction of stranded, pitch length and whether to back twist.If is the complex strand, also needs to consider the strand deformation, this needs to analyze the strand structure, the specification, the material, to determine the process data, finally selects the suitable strand machine.If it is a bundle of products, in addition to the number and size of the release reel, the size of the wire winding machine to determine the reel, is much more important than the winch.
Measuring twisted pitch with length is greater than the pitch of the paper tension on the wire, with a pencil or crayon along the winding axial row in the past, can get a set of marks, marks should be more than the number of measuring single layer of the root number, in the center of one of the tags, since it adjacent a number, when the number number is equal to the number of single root of measuring layer, also be a marker in the center of the final number of impressions, measuring the distance between two markers, pitch is the layer stranded wire.For the pitch measurement of wire products, since most of the wire is twisted together informally with a single wire of fine diameter, it cannot be measured by paper tape method.Therefore, the field measurement method can be used, that is, take out a section of wire bundle product, cut off one of the surface and make a mark at the shear, remove 10 spirals in the opposite direction of the wire bundle, and then measure the length of the twisted wire removed 10 spirals with a ruler, and then divide the obtained length data in 10 to obtain the pitch length of the wire bundle.
In general, the smaller the pitch ratio, the better the softness;The smaller the space between the single wires, the closer the hinge;And the pitch and the actual length of the single line in a pitch difference is also greater, the same length of the single line used by the stranded line will be longer.
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