Manufacturing method of 6(8)X61(M) class rough diameter steel wire rope without loosening

Abstract

A non-loose manufacturing method of 6(8)X61(M) class large diameter steel wire rope, the manufacturing process is as follows: the lay angle of the steel wire rope and each layer strand is 18.20°, the center steel wire diameter of the rope strand is 1.35 times of the diameter of the steel wire of other layers; the lay pitch multiple of the first layer strand is 6.7-6.8 times, the lay pitch multiple of the second layer strand is 7.7-7.8 times, the lay pitch multiple of the third layer strand is 8.2-8.3 times, and the lay pitch multiple of the fourth layer strand is 8.5-8.6 times; the gap ratio between the adjacent steel wires in each layer of the steel wire rope strand from inside to outside is 3.8:2.2:1.5:1.1; each layer strand is twisted in layers, or two or three layers or three or four layers are twisted at one time, and the twist angle of each layer strand must be equal; the post-twisting deformer roll pitch is 10-12 times of the strand diameter, the working roll diameter is 4 times of the nominal diameter of the rope strand, the roll down amount of the post-twisting deformer is 8-15 mm; the pre-twisting deformer roll pitch is 0.8-0.85 times of the lay pitch, the roll down amount is adjusted according to the strength grade of the steel wire rope, and the strand deforming rate is controlled in 82-88%.

Description

Technical Field

[0001] This invention relates to a method for manufacturing a non-loosening 6(8)X61(M) type coarse diameter steel wire rope, belonging to the field of metal product processing technology. Background Technology

[0002] The “6(8)X61(M)” type wire rope is a typical point-contact wire rope. Its strand structure is 1-6 / 12 / 18 / 24, with the wires in the strands arranged concentrically and having the same diameter (except for the center wire). The difference in the number of wires between adjacent layers is 6. Because of the large number of wires in its strands, this type of wire rope has good flexibility. Therefore, it is commonly used in hoisting and binding applications where ease of operation is a consideration. However, during the wire rope twisting process, the relative slippage between the wires is large after the strands are bent by the pre-deformer. This can easily cause problems such as loose wires and “back wires” in the strands. The strands cannot achieve sufficient pre-deformation, resulting in loose strands and fraying. The old version of GB / T 20067-2006 (coarse diameter steel wire rope) did not specify requirements for the non-loosening performance of this type of steel wire rope. However, the new version of GB / T 20067-2017 (coarse diameter steel wire rope) clearly requires that the steel wire rope be evenly twisted, tight, and non-loose (except for anti-rotation steel wire rope). This is also a performance requirement put forward by users when splicing this type of steel wire rope, and it also places higher demands on the manufacturing process technology of steel wire rope manufacturers. Summary of the Invention

[0003] The present invention aims to solve the technical problem of ensuring that the wire rope is twisted evenly, tightly, and without loosening.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A method for manufacturing a non-loosening 6(8)X61(M) type coarse diameter steel wire rope, the manufacturing process is as follows:

[0006] A. Determine that the lay angle of the wire rope and each layer of strands is 18.20°, and the diameter of the center wire of the strand is 1.35 times the diameter of the wires in other layers;

[0007] B. Determine the twist ratio of the first layer of strands to be 6.7 to 6.8, the twist ratio of the second layer of strands to be 7.7 to 7.8, the twist ratio of the third layer of strands to be 8.2 to 8.3, and the twist ratio of the fourth layer of strands to be 8.5 to 8.6.

[0008] C. Determine the ratio of the gap values ​​between adjacent wires in each layer of the wire rope strand from the inside out as 3.8:2.2:1.5:1.1;

[0009] D. Each layer of strands is twisted in layers, or a two- or three-layer or three- or four-layer twisting process is adopted. It is necessary to ensure that the twist angle of each layer of strands is equal.

[0010] E. The distance between the twisted strands and the deformer rollers is 10 to 12 times the strand diameter, the working roller diameter is 4 times the nominal diameter of the strand, and the reduction of the deformer rollers is 8 to 15 mm.

[0011] F. The pre-deformer roller spacing of the twist rope should be 0.8 to 0.85 times the twist pitch, and the reduction amount should be adjusted according to the strength grade of the wire rope. The strand deformation rate should be controlled at 82% to 88%.

[0012] The beneficial effects of adopting the above technical solution are:

[0013] The wire rope of the present invention has a full inner metal filling of the strands, and the strands are well compact after twisting. When the rope is made up, it can be fully pre-deformed by a pre-deformer, so as to achieve that the twisting of this type of wire rope is not loose. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0015] A method for manufacturing a non-loosening 6(8)X61(M) type coarse diameter steel wire rope, the manufacturing process is as follows:

[0016] A. Determine that the lay angle of the wire rope and each layer of strands is 18.20°, and the diameter of the center wire of the strand is 1.35 times the diameter of the wires in other layers;

[0017] B. Determine the twist ratio of the first layer of strands to be 6.7 to 6.8, the twist ratio of the second layer of strands to be 7.7 to 7.8, the twist ratio of the third layer of strands to be 8.2 to 8.3, and the twist ratio of the fourth layer of strands to be 8.5 to 8.6.

[0018] C. Determine the ratio of the gap values ​​between adjacent wires in each layer of the wire rope strand from the inside out as 3.8:2.2:1.5:1.1;

[0019] D. Each layer of strands is twisted in layers, or a two- or three-layer or three- or four-layer twisting process is adopted. It is necessary to ensure that the twist angle of each layer of strands is equal.

[0020] E. The distance between the twisted strands and the deformer rollers is 10 to 12 times the strand diameter, the working roller diameter is 4 times the nominal diameter of the strand, and the reduction of the deformer rollers is 8 to 15 mm.

[0021] F. The pre-deformer roller spacing of the twist rope should be 0.8 to 0.85 times the twist pitch, and the reduction amount should be adjusted according to the strength grade of the wire rope. The strand deformation rate should be controlled at 82% to 88%.

[0022] This invention employs parameters such as the twist angle of the wire rope and each layer of strands, the diameter of the center wire and other wires of the strands, and the multiple of the twist distance of each layer of strands. The ratio of the gap between adjacent wires in each layer of the wire rope strand from the inside out is designed as 3.8:2.2:1.5:1.1. The tooling parameters for twisting strands and ropes, the roll gap of the deformer and pre-deformer, the working roll diameter, the reduction amount, and the strand deformation rate are designed and manufactured. This invention can ensure that the twisting of this type of wire rope is not loose and meets the user's splicing requirements.

Claims

1. A method for manufacturing a non-loosening 6-strand x 61M type or 8-strand x 61M type coarse diameter steel wire rope, characterized in that: Its manufacturing process is as follows: A. Determine that the lay angle of the wire rope and each layer of strands is 18.20°, and the diameter of the center wire of the strand is 1.35 times the diameter of the wires in other layers; B. Determine the twist ratio of the first layer of strands to be 6.7 to 6.8, the twist ratio of the second layer of strands to be 7.7 to 7.8, the twist ratio of the third layer of strands to be 8.2 to 8.3, and the twist ratio of the fourth layer of strands to be 8.5 to 8.

6. C. Determine the ratio of the gap values ​​between adjacent wires in each layer of the wire rope strand from the inside out as 3.8:2.2:1.5:1.1; D. Each layer of strands is twisted in layers, or a two- or three-layer or three- or four-layer twisting process is adopted. It is necessary to ensure that the twist angle of each layer of strands is equal. E. The distance between the twisted strands and the deformer rollers is 10 to 12 times the strand diameter, the working roller diameter is 4 times the nominal diameter of the strand, and the reduction of the deformer rollers is 8 to 15 mm. F. The pre-deformer roller spacing of the twist rope should be 0.8 to 0.85 times the twist pitch, and the reduction amount should be adjusted according to the strength grade of the wire rope. The strand deformation rate should be controlled at 82% to 88%.