Anti-rotation steel wire rope of three-strand structure with diameter phi of 26 mm and manufacturing method thereof

Abstract

The invention relates to a three-strand structure anti-rotation steel wire rope with the diameter phi of 26 mm and a manufacturing method thereof. The steel wire rope adopts a three-strand structural design, a strand core is made of polypropylene, 48 steel wires are arranged in each strand, the steel wires in the strands are arranged in a point and line contact composite structural design, and the steel wires are twisted twice in three layers. After the steel wire rope is twisted, a forging process is adopted, and the breaking force of the whole rope is 14% higher than that of a four-strand steel wire rope of the same specification; compared with a four-strand steel wire rope of the same specification, the twisting radius of the strands is 15%-18% smaller, and therefore the steel wire rope has better rotation resistance.

Description

Technical Field

[0001] The invention relates to a process design and a manufacturing method of a φ26mm diameter three-strand anti-rotation steel wire rope, belonging to the technical field of metal product processing. Background Art

[0002] The anti-rotation performance of the single-layer strand structure anti-rotation wire rope comes from its special structure and special manufacturing process. Compared with the conventional single-layer strand wire rope, the number of strands in the rope group is reduced, and the diameter of the rope group strands needs to be increased. On the one hand, the twist circle radius of the strands is reduced, and on the other hand, the twist circle radius of the stranded steel wire is increased, while the rotation torque of the strands around the rope axis is reduced. At the same time, the rotation torque of the steel wire around the strand axis is increased, thereby making the wire rope obtain anti-rotation performance. The present invention provides a single-layer strand structure wire rope with good anti-rotation performance, high breaking tensile force of the whole rope and excellent anti-extrusion performance. The wire rope is used in the fields of ship equipment, port loading and unloading, power construction, oil exploration, metallurgy, special equipment, etc. Summary of the invention

[0003] The present invention aims to solve the technical problem of increasing the breaking tension of the entire steel wire rope on the one hand and reducing the twisting radius of the rope strands on the other hand, so that the steel wire rope has better anti-rotation performance.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: The diameter of the φ26mm three-strand anti-rotation steel wire rope is composed of three strands, each of which has a rope structure of FC-12 / 18-18.

[0005] Each of the three rope strands is composed of 48 steel wires, and the core of the strand is polypropylene (PP); Each strand is made of three layers of steel wires, which are twisted twice. First, the first layer of steel wires, the second layer of steel wires and the strand core are twisted. After twisting, the strand diameter is 7.75mm and the twist pitch is 58.00mm. Then, the outer layer of steel wires is twisted on this basis. After twisting, the strand diameter is 14.27mm and the twist pitch is 107.00mm. The nominal tensile strength of the first layer of steel wire, the second layer of steel wire and the outer layer of steel wire is 1960 MPa; when the three strands of the twisted steel wire rope are twisted, there is no filling core in the center, and the reserved gap is 0.3mm to 0.6mm, and the twisting direction of the steel wire rope is alternating twisting.

[0006] The diameter of the first layer of steel wire is 1.47 mm; The diameter of the second layer of steel wire is 1.50 mm; The outer steel wire has a diameter of 2.0 mm; It also includes a forging process after the wire rope is twisted: the diameter of the wire rope before forging is designed to be 30.00mm, and the wire rope is forged three times after twisting. The diameter of the wire rope is required to be 29.20mm after the first forging, 28.30mm after the second forging, and 27.50mm after the third forging.

[0007] The beneficial effects of adopting the above technical solution are: The steel wire rope of the present invention adopts a forging process after twisting, which can improve the breaking tension of the whole steel wire rope on the one hand, and reduce the twisting radius of the rope strands on the other hand, so that the steel wire rope has better anti-rotation performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a schematic diagram of the design of a three-strand structural steel wire rope with a diameter of φ26mm.

[0009] In the figure: 1-first layer of silk, 2-second layer of silk, 3-outer layer of silk, 4-core strand DETAILED DESCRIPTION

[0010] The following is further described in detail with reference to the accompanying drawings and embodiments: The diameter φ26mm steel wire rope is made of three strands of FC-12 / 18-18 in total, and the strength grade of the steel wire rope is 1960MPa. The three strands are in one layer, which belongs to the single-layer steel wire rope type.

[0011] Each of the three rope strands is composed of 48 steel wires, and the core of the strand is polypropylene (PP).

[0012] Each strand is composed of three layers of steel wires and is twisted twice. First, the first layer of steel wires (1), the second layer of steel wires (2) and the strand core (4) are twisted, and then the outer layer of steel wires (3) are twisted on this basis. The diameter of the first layer of steel wires (1) is 1.47 mm, the diameter of the second layer of steel wires (2) is 1.50 mm, the diameter of the outer layer of steel wires (3) is 2.0 mm, and the nominal tensile strength of the steel wires is 1960 MPa. After the first twisting, the strand diameter is 7.75 mm and the twist pitch is 58.00 mm. After the second twisting, the strand diameter is 14.27 mm and the twist pitch is 107.00 mm.

[0013] When the three rope strands are twisted into a steel wire rope, there is no filling core in the center, and a reserved gap of 0.3mm to 0.6mm is provided; and the twisting direction of the steel wire rope is alternating twisting.

[0014] The diameter of the wire rope before forging is designed to be 30.00mm. After the wire rope is twisted, it is forged three times. The diameter of the wire rope is required to be 29.20mm after the first forging, 28.30mm after the second forging, and 27.50mm after the third forging.

[0015] Produced according to the above process design parameters, the measured diameter is 27.30mm~27.50mm, and the measured breaking tension of the wire rope is 567kN.

Claims

1. φ26mm diameter three-strand anti-rotation steel wire rope, characterized by: The wire rope consists of three strands, each with a strand structure of FC-12 / 18-18.

2. According to claim 1, the three-strand anti-rotation steel wire rope with a diameter of φ26 mm is characterized in that: Each of the three rope strands is composed of 48 steel wires, and the strand core (4) is polypropylene (PP).

3. The method for manufacturing a steel wire rope according to claim 1, characterized in that: Each strand is composed of three layers of steel wires and is twisted in two steps. First, the first layer of steel wires (1), the second layer of steel wires (2) and the strand core (4) are twisted. After the twisting is completed, the strand diameter is 7.75 mm and the twist pitch is 58.00 mm. Then, the outer layer of steel wires (3) are twisted on this basis. After the twisting is completed, the strand diameter is 14.27 mm and the twist pitch is 107.00 mm. The first layer of steel wires (1), the second layer of steel wires (2) and the outer layer of steel wires (3) have a nominal tensile strength of 1960 MPa; the three strands of the twisted steel wire rope have no filling core in the center when twisting the steel wire rope, a reserved gap of 0.3 mm to 0.6 mm, and the twisting direction of the steel wire rope is alternating twisting.

4. The manufacturing method according to claim 3, characterized in that: The diameter of the first layer of steel wire (1) is 1.47 mm; The diameter of the second layer of steel wire (2) is 1.50 mm; The outer layer steel wire (3) has a diameter of 2.0 mm.

5. The manufacturing method according to claim 3, characterized in that: It also includes a forging process after the wire rope is twisted: the diameter of the wire rope before forging is designed to be 30.00mm, and the wire rope is forged three times after twisting. The diameter of the wire rope is required to be 29.20mm after the first forging, 28.30mm after the second forging, and 27.50mm after the third forging.

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