Multi-strand center strand stress relieving pay-off device for steel wire rope twisting and operation method thereof

Abstract

The application discloses a multi-strand center strand stress-removing pay-off device for steel wire rope twisting, which comprises a base, a cradle and a driving assembly; the cradle can be driven to rotate by the driving assembly; the cradle comprises a frame, an A wire reel mounting assembly, a B wire reel mounting assembly and a pay-off tension balancing device; the A wire reel mounting assembly and the B wire reel mounting assembly are respectively arranged on the two sides of the frame and used for mounting the I-shaped reel wire reel; the A wire reel mounting assembly comprises an A top shaft, and the front end of the A top shaft is provided with a positioning shaft head; the B wire reel mounting assembly comprises a B top shaft; and the pay-off tension balancing device can exert damping force on the A top shaft so that the center strand rope keeps constant tension during pay-off. The multi-strand center strand stress-removing pay-off device for steel wire rope twisting realizes the stress-removing effect in the steel wire rope twisting process through the cradle with the pay-off tension balancing device, so that the quality of the finished steel wire rope is stable when twisting the steel wire rope with complex structure. Correspondingly, the application also provides a corresponding operation method.

Description

Technical Field

[0001] This invention relates to the twisting technology of steel wire rope for the production of rubber tracks, specifically to a multi-strand center strand stress-relieving wire feeding device and its operating method for steel wire rope twisting. Background Technology

[0002] Steel wire rope is a helical bundle of steel wires that meet specific mechanical properties and geometric dimensions, twisted together according to certain rules. Industrially, this is achieved using a stranding machine. Over the past decade, global demand for complex-structured steel wire ropes, especially multi-strand center-strand complex-structured steel wire ropes (where the center strand is made of multiple single filaments twisted together), has increased significantly annually. As my country transforms from a manufacturing giant into a manufacturing powerhouse, the application of multi-strand center-strand complex-structured steel wire ropes is becoming increasingly widespread. For example, the skeleton materials of giant tires, engineering machinery tracks, and large tracked harvesters all utilize multi-strand center-strand complex-structured steel wire ropes, indicating a broad market prospect.

[0003] Stranding is an essential process in wire rope manufacturing. With continuous technological advancements, the requirements for stranding techniques are becoming increasingly stringent, and current stranding is typically achieved using stranding machines. However, when stranding complex multi-strand wire ropes with multiple center strands, the stranding stress generated during the stranding of the outer layers cannot be effectively removed, leading to quality issues such as strand lifting, back stranding, surface roughness, and unevenness. Severe strand lifting necessitates shutdown for repairs, impacting production efficiency. Currently, there is no mature solution to this problem in existing technology. For our company, the quality of the wire rope directly affects the quality and performance of our rubber track products; therefore, we need to invest in research and development to address these issues. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a stress-relieving wire rope feeding device for multi-strand center strands in wire rope twisting. This feeding device utilizes a cradle equipped with a constant tension feeding mechanism to achieve stress relief during the wire rope twisting process. This results in good quality stability of the finished wire rope when twisting complex multi-strand center strand wire ropes, effectively avoiding quality problems such as strand lifting, back stranding, surface roughness, and unevenness, thus improving production efficiency and reducing production costs. Furthermore, the specific structural design ensures that this feeding device is easy to operate and highly reliable. Correspondingly, this invention also provides a method for operating the multi-strand center strand stress-relieving wire rope feeding device.

[0005] For a multi-strand center strand stress-relieving wire feeding device, the present invention provides the following technical solution:

[0006] A multi-strand center strand stress-relieving wire rope laying device for wire rope twisting includes a base, a cradle and a drive assembly mounted on the base; the cradle can be driven to rotate by the drive assembly; the cradle includes a frame, an A-spool mounting assembly, a B-spool mounting assembly, and a constant tension laying device; the A-spool mounting assembly and the B-spool mounting assembly are respectively located on both sides of the frame for mounting I-beam reels; the A-spool mounting assembly includes an A-top shaft, which can rotate freely relative to the frame, and the front end of the A-top shaft has a positioning shaft head adapted to the end shaft hole of the I-beam reel; the B-spool mounting assembly includes a B-top shaft, which is clamped onto the frame and can rotate freely, and the clamping sleeve can adjust its position relative to the frame to load or unload the I-beam reel; the constant tension laying device can apply a damping force to the A-top shaft to maintain a constant tension in the center strand during laying.

[0007] Compared with the prior art, the multi-strand center strand stress-relieving wire rope feeding device of the present invention achieves stress relief during the multi-strand center strand twisting process by driving the cradle to rotate synchronously during wire feeding through the drive component. A constant tension device inside the cradle brakes the I-beam reel, ensuring the rope remains taut throughout the feeding process. Using this multi-strand center strand stress-relieving wire rope feeding device effectively avoids quality problems such as strand lifting, back stranding, surface roughness, and unevenness in wire ropes, improving the quality of complex multi-strand center strand wire ropes. Furthermore, workers do not need to constantly monitor the process; one worker can operate multiple twisting machines, increasing production efficiency and reducing labor costs.

[0008] As an optimization, in the aforementioned multi-strand center strand stress-relieving wire release device for wire rope twisting, the A-reel mounting assembly further includes an end cap; a bearing assembly is provided between the end cap and the A-top shaft, the bearing assembly including an A-radial bearing, a bushing, a thrust bearing, a round tube, and a B-radial bearing arranged sequentially; the bushing has a set of bosses, and the A-top shaft has a set of A-grooves corresponding to the bosses, so that the bushing can rotate synchronously with the A-top shaft; the interior of the B-reel mounting assembly also has a bearing assembly between the B-top shaft and the clamping sleeve; the B-top shaft has a set of B-grooves that mate with the bushing. With this specific structure, using the bearing assembly composed of the A-radial bearing, bushing, thrust bearing, round tube, and B-radial bearing as an intermediate connecting part, the H-beam reel can rotate freely while being clamped.

[0009] As an optimization, in the aforementioned multi-strand center strand stress-relieving wire rope laying device, the cradle is equipped with a crossbar; the constant tension laying device includes a pair of mounting brackets and a U-shaped component; the mounting brackets are mounted on both sides of the crossbar; the U-shaped component is fitted onto the top shaft A and connected to the mounting brackets by bolts; a set of damping blocks is provided at the contact point between the U-shaped component and the top shaft A. With this structure, the crossbar inside the cradle facilitates the installation of the constant tension laying device while also serving as a reinforcing rib; the constant tension laying device composed of the U-shaped component and damping blocks has a simple structure and good damping effect.

[0010] Furthermore, in the aforementioned multi-strand center strand stress-relieving wire rope laying device for wire rope twisting, a spring is provided between the bolt and the mounting bracket. This structure allows adjustment of the bolt tightness to change the magnitude of the damping force, making the damping force of the constant tension laying device adjustable.

[0011] Furthermore, in the aforementioned multi-strand center strand stress-relieving wire rope laying device for wire rope twisting, the U-shaped component is a chain structure. This structure facilitates the installation and disassembly of the constant tension laying device.

[0012] Furthermore, in the aforementioned multi-strand center strand stress-relieving wire-laying device for wire rope twisting, an annular groove is provided at the contact point between the A-top shaft and the damping block, and the damping block is disposed within the annular groove. This structure prevents the damping block from slipping off along the axial direction of the A-top shaft, thus improving the reliability of the device.

[0013] As an optimization, in the aforementioned multi-strand center strand stress-relieving wire rope laying device for wire rope twisting, the drive assembly includes a reducer, a motor, and an electromagnetic brake. This structure, with the electromagnetic brake, enables rapid braking and, after the motor is de-energized, keeps the cradle stationary, facilitating both easy installation and removal of the I-beam reel while ensuring greater safety.

[0014] As an optimization, in the aforementioned multi-strand center strand stress-relieving wire-laying device for wire rope twisting, the electromagnetic brake includes an electromagnet, a brake spring, a brake disc, a C-shaped radial bearing, and a fixed cover. The C-shaped radial bearing is located inside the electromagnet and sleeved on the drive shaft of the motor. The electromagnetic brake is equipped with a crank-slider mechanism. A handle is provided on the crank, and the slider is located on the brake disc. A crank rotation center support is provided on the electromagnet. With this structure, the crank-slider mechanism is provided on the electromagnetic brake, and a handle is provided on the crank. When the electromagnetic brake is de-energized and brakes the drive shaft of the motor, the brake disc can be manually rotated to separate from the drive shaft of the motor, temporarily releasing the braking state. This facilitates the cradle being rotated to a suitable position for loading and unloading the I-beam reel.

[0015] As an optimization, in the aforementioned multi-strand center strand stress-relieving wire-laying device for wire rope twisting, a dust cover is provided above the electromagnetic brake, and a fan is installed inside the dust cover. With this structure, the fan can accelerate heat dissipation when the electromagnetic brake applies electromagnetic braking to the motor's drive shaft.

[0016] Regarding the operating method, the present invention provides the following technical solution:

[0017] The operating method of the multi-strand center strand stress-relieving wire-laying device for wire rope twisting includes the following steps:

[0018] i. Rotate the cradle so that the compression sleeve faces upwards;

[0019] ii. Place the I-beam reel onto the A-beam reel mounting assembly and fit the end shaft hole of the I-beam reel onto the positioning shaft head of the A-top shaft;

[0020] iii. Tighten the clamping sleeve to secure the I-beam reel;

[0021] iv. Thread the rope on the I-beam reel into the twisting machine;

[0022] v. Set the cradle's direction and speed according to the production process requirements;

[0023] ⅵ. Start the drive components at the same time as starting the twisting machine.

[0024] Compared with the prior art, the operation method of the multi-strand center strand stress relief and wire feeding device for wire rope twisting of the present invention can set the direction and speed of the cradle according to the actual production process requirements to achieve the stress relief effect of the multi-strand center strand; and during production, the operator does not need to keep an eye on the center strand at all times, and a single operator can operate multiple units, which improves efficiency and reduces labor costs. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the multi-strand center strand stress-relieving wire-laying device for wire rope twisting according to an embodiment of the present invention;

[0026] Figure 2 yes Figure 1 A partial enlarged view of the device;

[0027] Figure 3 yes Figure 1 Cross-sectional view of the device (with the drive components removed);

[0028] Figure 4 yes Figure 3 Enlarged view of structure B in the middle;

[0029] Figure 5 yes Figure 4 A partial structural diagram;

[0030] Figure 6 This is a schematic diagram of the constant tension wire feeding device installed on the top shaft A in this invention;

[0031] Figure 7 This is a schematic diagram showing the installation positions of the motor, electromagnetic brake, and fan in this invention;

[0032] Figure 8 yes Figure 7 Cross-sectional view of the middle section of the structure;

[0033] Figure 9 This is a schematic diagram of the electromagnetic brake in this invention;

[0034] Figure 10 This is a schematic diagram of the structure of the B-top shaft in this invention;

[0035] Figure 11 This is a schematic diagram of the bushing structure in this invention.

[0036] The labels in the attached diagram are: 1-base; 2-cradle; 21-frame; 22-A-coil mounting assembly; 221-A-top shaft; 2211-positioning shaft head; 2212-A-groove; 2213-annular groove; 222-end cap; 23-B-coil mounting assembly; 231-B-top shaft; 2311-B-groove; 232-pressure sleeve; 24-constant tension feeding device; 241-mounting bracket; 242-U-shaped component; 243-bolt; 244-damping block; 245-spring; 25- Crossbar; 3-Drive assembly, 31-Reducer, 32-Motor, 33-Electromagnetic brake, 331-Electromagnet, 332-Brake spring, 333-Brake disc, 334-C radial bearing, 335-Fixed cover, 336-Handle, 337-Crank rotation center support; 4-I-beam reel; 5-Bearing assembly, 51-A radial bearing, 52-Busset, 521-Boss, 53-Thrust bearing, 54-Round tube, 55-B radial bearing; 6-Dust cover; 7-Fan. Detailed Implementation

[0037] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention. In the following embodiments, any techniques not described in detail are conventional technical means or common knowledge in the art.

[0038] Example (see) Figures 1 to 11 ):

[0039] A multi-strand center strand stress-relieving wire rope feeding device for wire rope twisting includes a base 1, a cradle 2 and a drive assembly 3 mounted on the base 1; the cradle 2 can be driven to rotate by the drive assembly 3; the cradle 2 includes a frame 21, an A-spool mounting assembly 22, a B-spool mounting assembly 23, and a constant tension feeding device 24; the A-spool mounting assembly 22 and the B-spool mounting assembly 23 are respectively located on both sides of the frame 21 for mounting I-beam reels 4; the A-spool mounting assembly 22 includes an A-top shaft 221, the A-top... The shaft 221 can rotate freely relative to the frame 21. The front end of the A top shaft 221 has a positioning shaft head 2211 that is adapted to the end shaft hole of the I-beam reel 4. The B reel mounting assembly 23 includes the B top shaft 231. The B top shaft 231 is mounted on the frame 21 through a clamping sleeve 232 and can rotate freely. The clamping sleeve 232 can be adjusted relative to the frame 21 to load or unload the I-beam reel 4. The constant tension device 24 can apply a damping force to the A top shaft 221 to keep the central strand of the wire under constant tension during wire feeding.

[0040] In this embodiment, the A-coil mounting assembly 22 further includes an end cap 222; a bearing assembly 5 is provided between the end cap 222 and the A-top shaft 221, the bearing assembly 5 including an A-radial bearing 51, a bushing 52, a thrust bearing 53, a round tube 54, and a B-radial bearing 55 arranged sequentially; the bushing 52 is provided with a set of bosses 521, and the A-top shaft 221 is provided with a set of A-grooves 2212 corresponding to the bosses 521, so that the bushing 52 can rotate synchronously with the A-top shaft 221; the interior of the B-coil mounting assembly 23 also provides a bearing assembly 5 between the B-top shaft 231 and the clamping sleeve 232; the B-top shaft 231 is provided with a set of B-grooves 2311 that cooperate with the bushing 52. The bearing assembly 5, composed of the A-radial bearing 51, bushing 52, thrust bearing 53, round tube 54, and B-radial bearing 55, serves as an intermediate connecting member, allowing the H-beam reel 4 to rotate freely while being clamped.

[0041] In this embodiment, the cradle 2 has a crossbar 25 inside; the constant tension wire feeding device 24 includes a pair of mounting brackets 241 and a U-shaped component 242; the mounting brackets 241 are located on both sides of the crossbar 25; the U-shaped component 242 is fitted onto the A-top shaft 221 and connected to the mounting brackets 241 by bolts 243; a set of damping blocks 244 are provided at the contact point between the U-shaped component 242 and the A-top shaft 221. The crossbar 25 inside the cradle 2 facilitates the installation of the constant tension wire feeding device 24 and also serves as a reinforcing rib; the constant tension wire feeding device 24, composed of the U-shaped component 242 and the damping blocks 244, has a simple structure and good damping effect.

[0042] In this embodiment, a spring 245 is provided between the bolt 243 and the mounting bracket 241. The tightness of the bolt 243 can be adjusted to change the magnitude of the damping force, making the damping force of the constant tension wire feeding device 24 adjustable.

[0043] In this embodiment, the U-shaped component 242 is a chain structure. This structure facilitates the installation and disassembly of the constant tension wire feeding device 24.

[0044] In this embodiment, an annular groove 2213 is provided at the contact point between the A-top shaft 221 and the damping block 244, and the damping block 244 is disposed within the annular groove 2213. This structure prevents the damping block 244 from slipping off along the axial direction of the A-top shaft 221, thus improving the reliability of the device.

[0045] In this embodiment, the drive assembly 3 includes a reducer 31, a motor 32, and an electromagnetic brake 33. The electromagnetic brake 33 enables rapid braking and, after the motor 32 is de-energized, keeps the cradle 2 stationary, facilitating the installation and removal of the I-beam reel 4 while ensuring safety.

[0046] In this embodiment, the electromagnetic brake 33 includes an electromagnet 331, a brake spring 332, a brake disc 333, a C-radial bearing 334, and a fixing cover 335. The C-radial bearing 334 is located inside the electromagnet 331 and sleeved on the drive shaft of the motor 32. The electromagnetic brake 33 is equipped with a crank-slider mechanism. A handle 336 is provided on the crank, and the slider is located on the brake disc 333. A crank rotation center support 337 is provided on the electromagnet 331. By providing a crank-slider mechanism on the electromagnetic brake 33 and a handle 336 on the crank, when the electromagnetic brake 33 is de-energized and brakes the drive shaft of the motor 32, the brake disc 333 can be temporarily released by manually rotating the handle 336 to separate it from the drive shaft of the motor 32, facilitating the rotation of the cradle 2 to a suitable position for loading and unloading the I-beam reel 4.

[0047] In this embodiment, a dust cover 6 is provided above the electromagnetic brake 33, and a fan 7 is provided inside the dust cover 6. The fan 7 can accelerate heat dissipation when the electromagnetic brake 33 performs electromagnetic braking on the drive shaft of the motor 32.

[0048] When using the multi-strand center strand stress-relieving wire-laying device for wire rope twisting in this embodiment, the following steps are included:

[0049] i. Rotate handle 336 to separate brake disc 333 from the drive shaft of motor 32, temporarily releasing the braking state;

[0050] ii. Rotate the cradle 2 so that the clamping sleeve 232 faces upward, release the handle 336, and return to the braking state;

[0051] iii. Place the I-beam reel 4 onto the A-beam reel mounting assembly 22, and fit the end shaft hole of the I-beam reel 4 onto the positioning shaft head 2211 of the A-top shaft 221;

[0052] iv. Tighten the clamping sleeve 232 to secure the I-beam reel 4;

[0053] v. Thread the rope on the I-beam reel 4 into the twisting machine;

[0054] ⅵ. Set the direction and speed of the cradle 2 according to the production process requirements (when implementing this invention, the direction of the cradle 2 is the same as the twisting direction of the outer strand of the wire rope, and the speed of the cradle 2 is 70-90% of the rotation speed of the outer strand in the twisting machine).

[0055] vii. Start the twisting machine and simultaneously turn on drive component 3.

[0056] This application addresses the stress relief requirements of wire rope twisting for rubber tracks, but it can also be used for stress relief of the center strands of wire ropes of other specifications. After the multi-strand center strand stress relief wire rope laying device of the above embodiment is put into production, it effectively avoids quality problems such as wire rope stranding, back stranding, surface roughness, and unevenness.

[0057] The benefits of using the multi-strand center strand stress-relieving wire rope laying device in the embodiment are as follows: ① Increased efficiency: Before using the stress-relieving device, when laying complex multi-strand center strand structures, a worker could operate a maximum of two tubular stranding machines. After using the multi-strand center strand stress-relieving device, one worker can operate five tubular stranding machines when producing complex multi-strand center strand structures, increasing efficiency by 2.5 times; ② Easier operation: After using the multi-strand center strand stress-relieving device, the laying tension has remained relatively stable, requiring only a tension test every two months (previously, a tension test was required every time material was loaded); ③ Improved product quality: Previously, when laying complex multi-strand center strand wire ropes, quality problems such as back strands and rough rope surfaces were common. After using the multi-strand center strand stress-relieving device, the quality stability is good when laying complex structure wire ropes, and it is easier for employees to operate.

[0058] The foregoing general description of the invention and its specific embodiments should not be construed as a limitation on the technical solution of the invention. Those skilled in the art, based on the disclosure of this application, can add, reduce, or combine the disclosed technical features in the foregoing general description and / or specific embodiments (including examples) without departing from the constituent elements of the invention, to form other technical solutions within the scope of protection of this application.

Claims

1. A multi-strand center strand stress-relieving wire-laying device for wire rope twisting, characterized in that: It includes a base (1), a cradle (2) and a drive assembly (3) disposed on the base (1); the cradle (2) can be driven to rotate by the drive assembly (3); The cradle (2) includes a frame (21), an A-reel mounting assembly (22), a B-reel mounting assembly (23), and a constant tension feeding device (24). The A-reel mounting assembly (22) and the B-reel mounting assembly (23) are respectively located on both sides of the frame (21) for mounting the H-beam reel (4). The A-reel mounting assembly (22) includes an A-top shaft (221), which can rotate freely relative to the frame (21). The front end of the A-top shaft (221) has... A positioning shaft head (2211) adapted to the end shaft hole of the I-beam reel (4); the B reel mounting assembly (23) includes a B top shaft (231), which is mounted on the frame (21) via a clamping sleeve (232) and can rotate freely. The clamping sleeve (232) can be adjusted relative to the frame (21) to load or unload the I-beam reel (4); the constant tension device (24) can apply a damping force to the A top shaft (221) to keep the central strand of the wire constant tension during wire feeding; The cradle (2) is provided with a crossbar (25) inside; the constant tension device (24) for wire feeding includes a pair of mounting brackets (241) and a U-shaped component (242); the mounting brackets (241) are located on both sides of the crossbar (25); the U-shaped component (242) is fitted onto the top shaft A (221) and connected to the mounting brackets (241) by bolts (243); a set of damping blocks (244) is provided at the contact point between the U-shaped component (242) and the top shaft A (221). A spring (245) is provided between the bolt (243) and the mounting bracket (241); the U-shaped part (242) is a chain structure; an annular groove (2213) is provided at the contact point between the A top shaft (221) and the damping block (244), and the damping block (244) is located in the annular groove (2213).

2. The multi-strand center strand stress-relieving wire-laying device for wire rope twisting according to claim 1, characterized in that: The A-coil mounting assembly (22) also includes an end cap (222); a bearing assembly (5) is provided between the end cap (222) and the A-top shaft (221), the bearing assembly (5) including an A-radial bearing (51), a bushing (52), a thrust bearing (53), a round tube (54) and a B-radial bearing (55) arranged in sequence; a set of bosses (521) is provided on the bushing (52), and a set of A-grooves (2212) corresponding to the bosses (521) is provided on the A-top shaft (221), so that the bushing (52) can rotate synchronously with the A-top shaft (221); the interior of the B-coil mounting assembly (23) is also provided with a bearing assembly (5) between the B-top shaft (231) and the clamping sleeve (232); a set of B-grooves (2311) that cooperate with the bushing (52) is provided on the B-top shaft (231).

3. The multi-strand center strand stress-relieving wire-laying device for wire rope twisting according to any one of claims 1-2, characterized in that: The drive assembly (3) includes a reducer (31), a motor (32), and an electromagnetic brake (33).

4. The multi-strand center strand stress-relieving wire-laying device for wire rope twisting according to claim 3, characterized in that: The electromagnetic brake (33) includes an electromagnet (331), a brake spring (332), a brake disc (333), a C-radial bearing (334), and a fixed cover (335); the C-radial bearing (334) is located inside the electromagnet (331) and sleeved on the drive shaft of the motor (32); the electromagnetic brake (33) is provided with a crank-slider mechanism; the crank is provided with a handle (336), and the slider is located on the brake disc (333); the electromagnet (331) is provided with a crank rotation center support (337).

5. The multi-strand center strand stress-relieving wire-laying device for wire rope twisting according to claim 4, characterized in that: The electromagnetic brake (33) is provided with a dust cover (6) above it, and a fan (7) is provided inside the dust cover (6).

6. The operating method of the multi-strand center strand stress-relieving wire-laying device for wire rope twisting according to claim 1, characterized in that, Includes the following steps: i. Rotate the cradle (2) so that the clamping sleeve (232) faces upward; ii. Place the I-beam reel (4) onto the A-beam reel mounting assembly (22) and fit the end shaft hole of the I-beam reel (4) onto the positioning shaft head (2211) of the A-top shaft (221); iii. Tighten the clamping sleeve (232) to secure the I-beam reel (4); iv. Thread the rope on the I-beam reel (4) into the twisting machine; v. Set the direction and speed of the cradle (2) according to the production process requirements; ⅵ. Start the twisting machine and simultaneously turn on the drive component (3).

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