KR20020079690A - The grommet sling wire rope and that of the manufacturing method - Google Patents

Abstract

PURPOSE: A grommet sling wire rope and a manufacturing method thereof are provided which is characterized by making it possible to produce products having various sizes, increasing elastic strength and flexibility, making it possible to reuse easily and having excellent strength and durability. CONSTITUTION: The grommet sling wire rope is obtained by a process containing the steps of: as a wire rope producing process(S1), coupling many outer strands on a center core comprised of metal wire to manufacture a wire rope; as a center determining process(S2), circularizing the wire rope; as a wire rope winding process(S3), winding a wire rope(200) for coiling around circumference of the circular center wire rope(100); as an end forming process(S4), putting the end of the remainder wire rope(200) for coiling between the wire ropes(100,200), and simultaneously putting the end of the center wire rope(100) between the wire rope(200) for coiling to engage each end; and then, as a finishing process(S5), finishing the circular rope connected both ends of the center wire rope(100) and both ends of the wire rope(200) for coiling.

Description

Grommet sling wire rope and that of the manufacturing method

The present invention relates to a grommetsling wire rope and a method of manufacturing the same, and more specifically, to the conventional endless sling wire rope by producing a grommetsling wire rope by applying the EYE splice processing method of a wire rope composed of a plurality of strands. The present invention relates to a grommling wire rope and a method of manufacturing the same, which increase the range of use of the wire rope by increasing flexibility, breaking load, strength and durability, and providing a wider size.

In general, a wire rope is a structure in which a plurality of metal wires or strands made of metal wires are twisted in a multi-layered wire structure, and is widely used in industrial fields such as machinery, construction, ships, and aerial cables. This general wire rope has a 7 × 7 structure consisting of one core and six strands, and a core having a plurality of outer layer strands twisted on the outer circumferential surface of the center and a plurality of outermost strands twisted and enclosed therein. It consists of a two-layer structure, each strand having a structure in which several strands of strands are stranded around a core wire at a predetermined twist pitch, and in accordance with the conditions such as the direction of twist, the pitch or the number of strands and the number of twisted layers, etc. Therefore, they are classified as products with various kinds of specifications.

Since a conventional wire rope made of a 7 × 7 structure has been commonly used, it has good abrasion resistance and can be usefully used in a harsh wear condition, and has a simple structure that is difficult to cause form breakage. Therefore, the 7 × 7 structure itself is used for the same color and color, but for the same color wire ropes as for cranes that require continuous rotational bending movement, sheaves that rotate or Due to the repeated reciprocating motion wound on a rotating body that is not large in diameter, such as a drum, the flexibility of the strand seam is low and the fatigue resistance is low because of insufficient flexibility, thereby increasing the number of disconnections. As a result, the disconnection generated in the strand seam of the 7 × 7 structure causes the rope to lose its shape and shorten the life of the rope.

The endless processing method uses the EYE splice processing method to loosen the strands and wound the strands seven times to form a rope itself with a 7 × 7 structure in the form of a center circle. That's how.

Therefore, the endless sling wire ropes, which are used in the same standard as the conventional wire ropes and formed by winding the wire ropes in the rope direction in the state of slight bending, solve some of the above problems, but are continuously and repeatedly used. As the tension is applied to the rope, the elastic elongation is restored to its original length in proportion to its lower weight, resulting in low flexibility, and its size range is narrow and limited. There are various problems such as the endless sling wire rope is not suitable.

An object of the present invention is to solve such problems in the prior art, by applying the conventional 6 × 37 IWRC wire rope by applying the EYE splice processing method used in the endless sling, compared to the endless sling wire rope. The purpose of the present invention is to provide a grommet sling wire rope and a method of manufacturing the same, which enables the production of wire ropes of a specified size, and increases flexibility by increasing cutting loads and elasticity. .

1 is a perspective view of a conventional wire rope

2 is a cross-sectional view of a conventional wire rope

3 is a cross-sectional view of a grommet sling according to the present invention.

4 is a perspective view of a grommet sling with the present invention

Figure 5a is a center wire rope according to the present invention

Figure 5b is a state diagram showing the step of winding the wire rope for winding on the central wire rope

Figure 5c is a state diagram showing the end forming step

5D is a perspective view of the completed grommetsling wire rope

6 is a state diagram according to an embodiment of the present invention;

<Description of Symbols for Major Parts of Drawings>

10, 10 '; End 100: Center Wire Rope 200: Winding Wire Rope

S1: wire rope production step S2: center determination step S3: wire rope winding step

S4: End forming step S5: Finishing step A: Gromming sling wire rope

B: wire rope

The present invention is a predetermined winding in the direction of the twist pitch on the outer peripheral surface of the central wire rope 100 by using a wire rope 200 for winding a straight wire to the center wire rope 100 made of a metal strand wound in a circular shape but not connected to the ends thereof. Grommet sling wire rope (A), which is wound at a rotational speed and constituted in a multi-layer stranded configuration, is manufactured.

In the method for manufacturing the grommet sling wire rope (A), a wire rope manufacturing step (S1) of producing a wire rope (b) by forming a plurality of outer layer strands in the center core made of a metal element wire; A center determination step (S2) of forming the center by forming the wire ropes (a) facing both ends 10 in a circular shape having a predetermined diameter; A step of winding the wire rope by winding a predetermined number of revolutions in the order of the rope twisting direction using one wire rope 200 for winding on the outer circumferential surface of the formed central wire rope 100; The end of the winding wire rope 200 wound around the center wire 100 is inserted between the wire ropes 100 and 200 wound around the center wire 100 and at the same time of the center wire 100 An end forming step (S4) in which each end is engaged with and connected to each other while being inserted between the wire ropes 200 for winding around the ends; The finishing operation step (S5) of finishing the entire circular rope is connected to both ends 10 'of the central wire rope 100 and both ends 10' of the wire rope 200 for the winding; The grommling wire rope is manufactured.

This invention shows the conventional wire rope (b) shown in FIG. 1 and FIG. 2. The wire rope (b) of 6x37 + IWRC type | mold is used. The iron core used for the center and strand of wire rope (b) is widely used because of its shape stability, cutting load, high modulus of elasticity and low elongation.In particular, Independent Wire Rope Core (IWRC) is an iron core inserted into a rope center. Most used.

3 shows a cross-sectional view of the invention, and FIG. 4 shows a perspective view of the invention.

5a and 5b, the wire rope (b) formed in the wire rope manufacturing step (S1) with the center wire rope 100 is arranged so that both ends are formed to face each other, and then the wire rope for winding (200) Take turns to the outer peripheral surface of the center wire rope (100) 7 turns. In FIG. 5C, after winding the wire rope 200 for winding, the ends 10 ′ and the ends 10 of the central wire rope 100 are interchanged to insert the ends. FIG. 5D is a perspective view illustrating the finished grommet sling wire rope after finishing the finishing step S5, and shows a step of manufacturing the grommet sling wire rope.

The processing method used to form the grommet sling wire rope (A) is an endless processing method derived from the EYE splice processing method. The EYE splice processing method is to unwind the strand of the rope terminal and squeeze it into the rope body. 5 or more twists are required. The efficiency of the EYE splice is 70 ~ 90%, depending on the rope diameter. EYE splices can be made in the rope state and processing method made by dividing the rope into two sets. There is also a way to put the THIMBLE in the EYE part as needed. In addition, the present invention is divided into weaving and winding, but the present invention by applying a winding method by twisting the rope of the ends 10, 10 'in a different rope direction by twisting the rope in the direction of a rope-like appearance.

In addition, terminal processing of grommetsling wire rope (A) should handle safety and danger in the same way as rope, and lock processing, clip, clamp, wedge processing, etc. can be done according to fatigue and efficiency of processing method by repeated use. have.

Each of these processes has a cutting load efficiency of 95-100, 75-85, 95-100, 80-90%.

The data comparing the efficiency of the endless and grommetsling wire ropes processed by the method described above is as follows.

Nominal rope diameter Unit weight Calculated minimum breaking load tonnes mm kg / mt 60 14.5 238 63 16.0 262 67 18.1 296 71 20.4 333 75 22.7 371 80 25.8 422 85 29.2 477 90 32.7 535

Nominal rope diameter Unit weight Calculated minimumbreaking load tonn mm kg / mt 60 12.5 261 66 15.2 316 72 18.1 377 78 21.2 442 84 26.6 513 90 28.2 588 96 32.1 670 To To To 368 489.7 9145 380 513.2 9705

As can be seen from the comparison data above, when comparing EYE splice and endless machining with general wire rope (b) and grommet sling processing, the unit weight is 60mm in the same size. In case of 14.5kg per M, the grommetsling wire rope is 12.5kg, and in case of 90mm, the 32.7kg grommetsling wire rope is 28.2kg, which is lighter than the general wire rope. In the case of breaking load, the normal wire rope (B) is 238 ton, whereas the grommet sling wire rope is 261 ton, and in the case of 90 mm, the breaking load of the grommet sling wire rope (B) is 535ton and 588ton. The rapid increase can be seen from the experimental data.

And the general wire rope (a) sling processing is manufactured to produce a size less than 100mm due to the limitation of the production of the wire rope itself, but the grommet sling wire rope (b) can be manufactured to a size of up to 300mm or more mainly in sea It can be used to load heavy loads.

In addition, the elastic elongation of the grommet sling wire rope (A) is significantly increased compared to the endless sling wire rope processed by rotating the strands already bent seven times, and can be reused smoothly due to high recoverability after use. In addition, grease is used to compensate for this, since the use environment of grommetsling wire rope (B) is where rust occurs like seawater, etc., and friction with sieves and drums is often required. The grease used in the rope is a representative grease, which is a ferreratom system and an asphalt system, which have a viscosity, rust resistance, and lubricity that do not peel off or flow easily.

Thus, the present invention wire rope manufacturing step (S1), the center determination step (S2), wire rope winding step (S3), end forming step (S4), wire rope winding step (S3), end forming step (S4), finishing By manufacturing through the working step (S5), the range of sizes that can be manufactured is expanded and the flexibility increases as the elastic elongation increases, so it is easy to reuse after using it once. It is effective to provide a sling wire rope and a method of manufacturing the same.

Claims (5)

A method for manufacturing a grommet sling wire rope (A), comprising: a wire rope manufacturing step (S1) of manufacturing a wire rope (b) by forming a plurality of outer layer strands on a central core made of a metal element wire; A center determination step (S2) of forming the center by forming the wire ropes (a) facing both ends 10 in a circular shape having a predetermined diameter; A step of winding the wire rope by winding a predetermined number of revolutions in the order of the rope twisting direction using one wire rope 200 for winding on the outer circumferential surface of the formed central wire rope 100; The end of the winding wire rope 200 wound around the center wire 100 is inserted between the wire ropes 100 and 200 wound around the center wire 100 and at the same time of the center wire 100 An end forming step (S4) in which each end is engaged with and connected to each other while being inserted between the wire ropes 200 for winding around the ends; The finishing operation step (S5) of finishing the entire circular rope is connected to both ends 10 'of the central wire rope 100 and both ends 10' of the wire rope 200 for the winding; Grommling wire rope manufacturing method characterized in that the (G). In the conventional grommet sling wire rope (a), the center wire rope (200) using a wire rope (200) for winding a straight wire to the center wire (100) made of a metal strand wound in a circular shape but not connected to the end ( 100) A grommling wire rope, characterized in that the wire is wound around the outer circumferential surface at a predetermined rotational speed in a multi-layer stranded configuration. The method of claim 1, wherein the wire rope reeling step (S3), characterized in that the twisting of the rope more than 7 rotations of the grommling wire rope manufacturing method. The grommet sling wire rope according to claim 1 or 2, wherein the wire rope is constructed using various types of molds. The method of claim 1 or 2, the terminal processing method can be made of lock processing, clip, clamp, wedge processing, etc. having a cutting load efficiency of 95 ~ 100, 75 ~ 85, 95 ~ 100, 80 ~ 90% A grommling wire rope and its manufacturing method characterized by the above-mentioned.