wire rope 101 made in china

Factory Price 3.5mm Seamless Oval Stainless Steel Wire Rope Sleeve for sling,architectural appli Crimps.Available AISI 316 Stainless Steel Grade.Smooth Surface.Quickly Delivery.

Wire rope and cable are each considered a “machine”. The configuration and method of manufacture combined with the proper selection of material when designed for a specific purpose enables a wire rope or cable to transmit forces, motion and energy in some predetermined manner and to some desired end.

Two or more wires concentrically laid around a center wire is called a strand. It may consist of one or more layers. Typically, the number of wires in a strand is 7, 19 or 37. A group of strands laid around a core would be called a cable or wire rope. In terms of product designation, 7 strands with 19 wires in each strand would be a 7×19 cable: 7 strands with 7 wires in each strand would be a 7×7 cable.

Materials Different applications for wire rope present varying demands for strength, abrasion and corrosion resistance. In order to meet these requirements, wire rope is produced in a number of different materials.

Stainless Steel This is used where corrosion is a prime factor and the cost increase warrants its use. The 18% chromium, 8% nickel alloy known as type 302 is the most common grade accepted due to both corrosion resistance and high strength. Other types frequently used in wire rope are 304, 305, 316 and 321, each having its specific advantage over the other. Type 305 is used where non-magnetic properties are required, however, there is a slight loss of strength.

Galvanized Carbon Steel This is used where strength is a prime factor and corrosion resistance is not great enough to require the use of stainless steel. The lower cost is usually a consideration in the selection of galvanized carbon steel. Wires used in these wire ropes are individually coated with a layer of zinc which offers a good measure of protection from corrosive elements.

Cable Construction The greater the number of wires in a strand or cable of a given diameter, the more flexibility it has. A 1×7 or a 1×19 strand, having 7 and 19 wires respectively, is used principally as a fixed member, as a straight linkage, or where flexing is minimal.

Selecting Wire Rope When selecting a wire rope to give the best service, there are four requirements which should be given consideration. A proper choice is made by correctly estimating the relative importance of these requirements and selecting a rope which has the qualities best suited to withstand the effects of continued use. The rope should possess:Strength sufficient to take care of the maximum load that may be applied, with a proper safety factor.

Strength Wire rope in service is subjected to several kinds of stresses. The stresses most frequently encountered are direct tension, stress due to acceleration, stress due to sudden or shock loads, stress due to bending, and stress resulting from several forces acting at one time. For the most part, these stresses can be converted into terms of simple tension, and a rope of approximately the correct strength can be chosen. As the strength of a wire rope is determined by its, size, grade and construction, these three factors should be considered.

Safety Factors The safety factor is the ratio of the strength of the rope to the working load. A wire rope with a strength of 10,000 pounds and a total working load of 2,000 pounds would be operating with a safety factor of five.

It is not possible to set safety factors for the various types of wire rope using equipment, as this factor can vary with conditions on individual units of equipment.

The proper safety factor depends not only on the loads applied, but also on the speed of operation, shock load applied, the type of fittings used for securing the rope ends, the acceleration and deceleration, the length of rope, the number, size and location of sheaves and drums, the factors causing abrasion and corrosion and the facilities for inspection.

Fatigue Fatigue failure of the wires in a wire rope is the result of the propagation of small cracks under repeated applications of bending loads. It occurs when ropes operate over comparatively small sheaves or drums. The repeated bending of the individual wires, as the rope bends when passing over the sheaves or drums, and the straightening of the individual wires, as the rope leaves the sheaves or drums, causing fatigue. The effect of fatigue on wires is illustrated by bending a wire repeatedly back and forth until it breaks.

The best means of preventing early fatigue of wire ropes is to use sheaves and drums of adequate size. To increase the resistance to fatigue, a rope of more flexible construction should be used, as increased flexibility is secured through the use of smaller wires.

Abrasive Wear The ability of a wire rope to withstand abrasion is determined by the size, the carbon and manganese content, the heat treatment of the outer wires and the construction of the rope. The larger outer wires of the less flexible constructions are better able to withstand abrasion than the finer outer wires of the more flexible ropes. The higher carbon and manganese content and the heat treatment used in producing wire for the stronger ropes, make the higher grade ropes better able to withstand abrasive wear than the lower grade ropes.

Effects of Bending All wire ropes, except stationary ropes used as guys or supports, are subjected to bending around sheaves or drums. The service obtained from wire ropes is, to a large extent, dependent upon the proper choice and location of the sheaves and drums about which it operates.

A wire rope may be considered a machine in which the individual elements (wires and strands) slide upon each other when the rope is bent. Therefore, as a prerequisite to the satisfactory operation of wire rope over sheaves and drums, the rope must be properly lubricated.

Loss of strength due to bending is caused by the inability of the individual strands and wires to adjust themselves to their changed position when the rope is bent. Tests made by the National Institute of Standards and Technology show that the rope strength decreases in a marked degree as the sheave diameter grows smaller with respect to the diameter of the rope. The loss of strength due to bending wire ropes over the sheaves found in common use will not exceed 6% and will usually be about 4%.

The bending of a wire rope is accompanied by readjustment in the positions of the strands and wires and results in actual bending of the wires. Repetitive flexing of the wires develops bending loads which, even though well within the elastic limit of the wires, set up points of stress concentration.

The fatigue effect of bending appears in the form of small cracks in the wires at these over-stressed foci. These cracks propagate under repeated stress cycles, until the remaining sound metal is inadequate to withstand the bending load. This results in broken wires showing no apparent contraction of cross section.

Experience has established the fact that from the service view-point, a very definite relationship exists between the size of the individual outer wires of a wire rope and the size of the sheave or drum about which it operates. Sheaves and drums smaller than 200 times the diameter of the outer wires will cause permanent set in a heavily loaded rope. Good practice requires the use of sheaves and drums with diameters 800 times the diameter of the outer wires in the rope for heavily loaded fast-moving ropes.

It is impossible to give a definite minimum size of sheave or drum about which a wire rope will operate with satisfactory results, because of the other factors affecting the useful life of the rope. If the loads are light or the speed slow, smaller sheaves and drums can be used without causing early fatigue of the wires than if the loads are heavy or the speed is fast. Reverse bends, where a rope is bent in one direction and then in the opposite direction, cause excessive fatigue and should be avoided whenever possible. When a reverse bend is necessary larger sheaves are required than would be the case if the rope were bent in one direction only.

Stretch of Wire Rope The stretch of a wire rope under load is the result of two components: the structural stretch and the elastic stretch. Structural stretch of wire rope is caused by the lengthening of the rope lay, compression of the core and adjustment of the wires and strands to the load placed upon the wire rope. The elastic stretch is caused by elongation of the wires.

The structural stretch varies with the size of core, the lengths of lays and the construction of the rope. This stretch also varies with the loads imposed and the amount of bending to which the rope is subjected. For estimating this stretch the value of one-half percent, or .005 times the length of the rope under load, gives an approximate figure. If loads are light, one-quarter percent or .0025 times the rope length may be used. With heavy loads, this stretch may approach one percent, or .01 times the rope length.

The elastic stretch of a wire rope is directly proportional to the load and the length of rope under load, and inversely proportional to the metallic area and modulus of elasticity. This applies only to loads that do not exceed the elastic limit of a wire rope. The elastic limit of stainless steel wire rope is approximately 60% of its breaking strength and for galvanized ropes it is approximately 50%.

Preformed Wire Ropes Preformed ropes differ from the standard, or non-preformed ropes, in that the individual wires in the strands and the strands in the rope are preformed, or pre-shaped to their proper shape before they are assembled in the finished rope.

This, in turn, results in preformed wire ropes having the following characteristics:They can be cut without the seizings necessary to retain the rope structure of non-preformed ropes.

They are substantially free from liveliness and twisting tendencies. This makes installation and handling easier, and lessens the likelihood of damage to the rope from kinking or fouling. Preforming permits the more general use of Lang lay and wire core constructions.

Removal of internal stresses increase resistance to fatigue from bending. This results in increased service where ability to withstand bending is the important requirement. It also permits the use of ropes with larger outer wires, when increased wear resistance is desired.

Outer wires will wear thinner before breaking, and broken wire ends will not protrude from the rope to injure worker’s hands, to nick and distort adjacent wires, or to wear sheaves and drums. Because of the fact that broken wire ends do not porcupine, they are not as noticeable as they are in non-preformed ropes. This necessitates the use of greater care when inspecting worn preformed ropes, to determine their true condition.

9 Strand elevator wire ropes with steel core are constructed with Seale, Filler or Warrington strand. The construction rope has excellent bend fatigue, very good elongation properties and crushing resistance. The steel core wire ropes can enhance the contact on drum and sheaves.

Our elevator rope wire is made from redrawn galvanized wires. They are designed for use in traction- and deflection sheaves. Featuring high tensile strength and excellent ductility, the wire helps increase the service life of your rope.

Steel wire rope closing, automatically fine work. Euipped with a 6 bobbin closing machine with a single length capacity of 60 metric tons, thus meet high volume requirements from global customers.

Wire ropes can be seen everywhere around us, they are made of strands or bundles of individual wires constructed around an independent core, suitable for construction, industrial, fitness, commercial, architectural, agricultural, and marine rigging applications.

Wire rod is made from high carbon steel wires(0.35 to 0.85 percent carbon) in a hot rolling process of a required diameter, usually from 5.5mm to 8 mm.

Wire rod is drawn to the required diameter by the 1st drawing machine after descaling dust and rust, adding mechanical properties suitable for application.

Positioning the wires different or the same size lay in multiple layers and same direction, or cross lay and diameter is maintained by one-third of the rope size.

So in theory, it is very simple to manufacture wire ropes. However there are many more details that must be closely monitored and controlled, and this requires time and experienced personnel since it is a super complicated project you cannot imagine.

As in figure 2 it is shown, a kind of steel wire rope component system of processing, wherein, described steel wire rope component 1 include steel wire rope 101,

It is arranged at the screw rod 102 at steel wire rope 101 two ends and is arranged at the connecting plate 103 in the middle part of steel wire rope 101, described processing

Press 3 is positioned at the left side of described second riveter 4；Described system of processing also includes for clamping and steel wire rope 101 one end

Have 7 and for clamping and the 3rd fixture 8 of the connecting plate 103 of riveting in the middle part of steel wire rope 101；Described first fixture 6

Described 3rd fixture 8 is slidably arranged on the second riveter.System of processing of the present invention for the processing of steel wire rope component,

Achieve automatically piercing of steel wire rope two ends and screw rod endoporus；Automatically the spiro rod section penetrating steel wire rope is carried out riveting；Even

And leave the gap for steel wire rope of nipping between lower contact roller 232；In the present embodiment, described elastic component 223 uses to be stretched

Power wheel drives lower contact roller to rotate, and lower contact roller drives upper contact roller to rotate, thus realizes about to the level of steel wire rope

Mobile；Along described processing centerline direction and be positioned at described pay-off 2 both sides on be provided with and lead for steel wire rope

Lateral aperture is more than aperture, outside, and outside aperture size is between wirerope diameter and bolt external diameter；Be conducive to fairlead

Guiding to steel wire rope, the most beneficially pay-off block the caulking part of the good screw rod of riveting on steel wire rope, described upper and lower

When contact roller is at least two group, owing to steel wire rope is flexible structure, thus its adjacent between be provided with for steel wire rope transition guide

Damping coil holder, effectively stops coil holder 10 to rotate backward, and the present embodiment can change the length of steel wire rope at any time according to process requirements

Degree, avoids under line after cutting steel wire rope because protective measure is not in place simultaneously, causes termination outlet bifurcated or the bending of steel wire rope,

As the improvement of the present embodiment, described system of processing also includes the cutting machine 12 for cutting steel wire rope, is conducive to carrying

High efficiency, reduces labor intensity, and cutting machine more can guarantee that the termination not bifurcated of steel wire rope；Meanwhile, cutting machine can

As the improvement of the present embodiment, described pay-off 2 is provided with for detecting riveting feelings between steel wire rope one end and screw rod

First pressure transducer 14 of condition；Described test cartridge 13 is provided with for detecting the steel wire rope other end and screw rod riveting feelings

Second pressure transducer 15 of condition；The test force of steel wire rope component is pressed by the first pressure transducer being respectively provided with and second

Detector (is not drawn in figure), is conducive to the end avoiding steel wire rope to fail because of broken lot and penetrates in screw hole, shadow

Fixture and the 3rd fixture make connecting plate be positioned in the middle part of steel wire rope, and by the second riveter, connecting plate caulking part are carried out riveting

Concrete, first, the steel wire rope one end being wound on coil holder is incorporated in pay-off by the artificial leading truck that passes through,

And clamp and make connecting plate be connected to the upper of steel wire rope by the movement of the 3rd fixture, movement the first fixture, the second fixture and

3rd fixture makes connecting plate be positioned in the middle part of steel wire rope, and carries out riveting by the second riveter；Finally, open the first fixture,

Steel wire rope component processing is ready；System of processing of the present invention is operated by many people during instead of traditional techniques

The present situation that simple and crude equipment completes, it is achieved that steel wire rope two ends pierces, automatically to penetrating steel wire rope automatically with screw rod endoporus

Spiro rod section carry out riveting and connecting plate and the automatic clamping of steel wire rope, riveting；Advantageously form automaticity high

A2 unclamps the first fixture and the second fixture, makes pay-off and pressure measurement chuck can block the riveting at steel wire rope two ends respectively

Whether riveting is qualified carries out online tensile test to screw rod, steel wire rope, connecting plate to apply the horizontal force specifying size；

Press chuck to block respectively prop up the riveting position at steel wire rope two ends and stretched by steel wire rope；Then, keep the 3rd fixture to even

Whether riveting is qualified carries out online tensile test for bar, steel wire rope, connecting plate；Its test force is by being respectively arranged at pay-off

Unclamp pay-off and test cartridge, manually carry out the lower part operation of workpiece；The present invention each caulking part to steel wire rope component

Point out on the left of this steel wire rope or the riveting position at middle part is defective, specifically can come according to the sliding vestige of steel wire rope on caulking part

Judge whether on the left of steel wire rope that caulking part is insecure or in the middle part of steel wire rope, caulking part is insecure；If the 3rd fixture moves right

Dynamic distance is less than 2mm, then alarm is pointed out on the left of this steel wire rope and the riveting position at middle part is qualified, in like manner, when the 3rd folder

When tool applies pulling force toward left side, if the 3rd fixture is moved to the left distance beyond 2mm, then alarm is pointed out on the right side of this steel wire rope

Or the riveting position at middle part is defective, specifically can judge whether it is steel wire rope according to the sliding vestige of steel wire rope on caulking part

Caulking part is insecure or in the middle part of steel wire rope, caulking part is insecure on right side；If the 3rd fixture moves right, distance is less than 2mm,

Having moved all process steps of steel wire rope component processing, meanwhile, labor intensity is low, and production efficiency is high, and potential safety hazard is low.