High-strength cable strand forming process

Abstract

The invention relates to the field of high-strength cable strand forming, and discloses a high-strength cable strand forming process which comprises the following steps: step 1, designing a regular polygon section section and a regular quadrangle section section of a cable strand; secondly, a plurality of steel wires sequentially penetrate through a wire separating frame, a traction device and a forming device; the yarn separating frame comprises a fixing frame, and a plurality of moving parts and a plurality of horizontal rods which are transversely arranged are arranged on the fixing frame; the fixing steel wires are divided into a plurality of rows which correspond to the horizontal rods respectively, and each row of fixing steel wires pass through the corresponding horizontal rods; 3, setting a wire separating frame, and enabling the vertical positions of all the moving steel wires to be consistent with the corresponding vertical positions of the regular polygon section; step 4, horizontally moving the moving rod to enable the arrangement of all the fixed steel wires to be consistent with the cross section of the regular quadrangle; and the moving pieces drive the corresponding moving steel wires to vertically move, so that the vertical positions of all the moving steel wires are consistent with the cross section of the regular quadrangle. Therefore, steel wire arrangement is controlled, and stability of strand quality is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of high-strength cable strand forming, in particular to a high-strength cable strand forming process. BACKGROUND

[0002] The main cable strand of a suspension bridge is the main force-bearing component of the suspension bridge, which is composed of several high-strength steel wires. Since the hexagonal cross-section can form a stable structure in the entire main cable, the cross-section of the main cable strand is generally hexagonal. However, the main cable strand needs to be shaped into a rectangular structure matching the saddle groove at positions such as the cable dispersion saddle and the main tower main saddle. During the operation, the hexagonal cross-section of the main cable strand is manually spread out at the construction site, and then placed into the saddle groove after being arranged into a rectangular cross-section. The manual steel sheet combing of the cable strand inevitably causes damage to the galvanized layer of the cable strand, reduces the corrosion prevention system of the cable strand, and wastes a large amount of manpower and time, thereby reducing the productivity of the cable strand erection.

[0003] Patent CN105401521B discloses a cable strand shaping clamp. During the steel wire conveying process, the cable strand is directly shaped by a rectangular and hexagonal clamp. Although the appearance can meet the requirements, the arrangement of the steel wires at each part of the cable strand is difficult to control during the process of the two clamps being alternately clamped, which can cause problems such as excessive local gap of the cable strand and misalignment between the steel wires, thereby seriously affecting the stress capacity of the cable strand and further shortening the service life of the bridge.

[0004] Therefore, there is a need for a cable strand forming process to control the arrangement of the steel wires and ensure the stability of the quality of the cable strand. SUMMARY

[0005] The present application aims to provide a high-strength cable strand forming process to control the arrangement of the steel wires and ensure the stability of the quality of the cable strand.

[0006] To achieve the above-mentioned purpose, the present application adopts the following technical solution: a high-strength cable strand forming process, comprising the following steps: Step one, designing a regular polygon cross-section section and a regular quadrilateral cross-section section of the cable strand; determining the overlapping area of the regular polygon cross-section and the regular quadrilateral cross-section, the steel wires located in the overlapping area are fixed steel wires, and the remaining steel wires are moving steel wires; Step two, preparing a wire separating frame, a traction device and a forming device, and sequentially threading the plurality of steel wires through the wire separating frame, the traction device and the forming device; The wire separating frame comprises a fixed frame, a plurality of moving pieces and a plurality of horizontally arranged horizontal rods are arranged on the fixed frame; the fixed steel wires are divided into a plurality of rows, which correspond to the plurality of horizontal rods respectively, and each row of fixed steel wires passes through the corresponding horizontal rod; the horizontal rod comprises a moving rod, two limiting portions are arranged on the moving rod, the fixed steel wires located on the moving rod are limited between the two limiting portions, and the moving rod is horizontally slidably arranged on the fixed frame; Each moving piece corresponds to at least one moving steel wire, and the moving piece is used to drive the moving steel wire to move vertically; The forming device comprises a forming groove, and the forming groove can be switched between a regular polygonal groove and a regular quadrangular groove; Step three, set the positions of the moving rods and the moving pieces in the wire separating frame, so that the arrangement of all the fixed steel wires is consistent with the regular polygonal cross section, the vertical positions of all the moving steel wires are consistent with the corresponding vertical positions of the regular polygonal cross section, the forming groove is switched to the regular polygonal groove, and the traction device continuously conveys the steel wires until the steel wires of the regular polygonal cross section section enter the forming device; Step four, move the moving rods horizontally, so that the arrangement of all the fixed steel wires is consistent with the regular quadrangular cross section; move the moving pieces to drive the corresponding moving steel wires to move vertically, so that the vertical positions of all the moving steel wires are consistent with the regular quadrangular cross section; at the same time, the forming groove is switched to the regular quadrangular groove; continuously convey the steel wires until the steel wires of the regular polygonal cross section section enter the forming device; Step five, repeat steps three and four until the whole strand is formed.

[0007] The beneficial effects of the scheme are: 1. The horizontal rods, the moving rods and the moving pieces in the wire separating frame are used for orderly guiding and position control of the steel wires, which completely avoids mechanical damage to the galvanized layer caused by forcibly combing the steel wires by traditional manual steel sheets. The original corrosion prevention system of the strand is preserved from the root cause, thereby significantly improving the corrosion resistance of the strand and the service life of the bridge structure.

[0008] Specifically, the steel wires are divided into fixed steel wires and moving steel wires, the moving distance of the fixed steel wires is small, and therefore different moving modes and moving auxiliary structures are designed according to the moving distances of the fixed steel wires and the moving steel wires; Firstly, the fixed steel wires are subjected to layering treatment by the horizontal rods, thereby reducing the complexity of the wire separating frame, reducing the manufacturing cost of the wire separating frame, reducing the maintenance frequency and maintenance cost, and improving the reliability of the equipment; at the same time, the moving rods are arranged to move the steel wires that need to be moved in the whole row, which is convenient and fast, thereby realizing preliminary adjustment of the cross section; Then, the moving rods cannot completely realize the transition of the cross section, and the steel wires located at the edge of the cross section need to be moved individually to realize the transition of the cross section; however, due to the arrangement (obstruction) of the horizontal rods, the steel wires cannot move between different horizontal rods, and the moving pieces need to be arranged to drive the moving steel wires to move vertically.

[0009] 2. By pre-section design and transition planning, the "fixed steel wire" and "moving steel wire" and their movement path are determined, and the conversion process of the cross-sectional shape from a regular polygon (such as a hexagon) to a regular quadrilateral (a rectangle) is highly controllable. The independent and accurate driving of the wire separating device for various types of steel wires, combined with the shape switching of the forming groove, ensures that the relative position between the steel wires is accurate and closely arranged during the entire continuous forming process, effectively eliminating the quality defects such as steel wire misalignment and excessive local gap caused by the alternating clamping of the clamp in the prior art, thereby ensuring the uniformity and consistency of the internal steel wire arrangement of the cable strand, especially the stress-critical cable saddle section.

[0010] 3. Due to the above process, the regular arrangement and close packing of the steel wires in the transition section and the cable saddle section ensure that the overall density and cross-sectional mechanical properties of the cable strand approach or reach the ideal design state, eliminating the uncontrollable factors caused by the direct use of the clamp shaping of the forming device, and avoiding the problem of local stress concentration caused by internal steel wire disorder and uneven gap.

[0011] Further, in step one, the fixed steel wires are divided into several rows, and the horizontal movement of each row of fixed steel wires is the same, and if the moving steel wire can realize the cross-section transition only by horizontal movement, the moving steel wire is regarded as a fixed steel wire in the subsequent steps.

[0012] Further, in step one, the regular polygon cross-section is a regular hexagonal cross-section, and the relationship between the number of steel wires N1 in the regular hexagonal cross-section and the number of steel wires N2 in the regular quadrilateral cross-section is calculated according to the following formula, and the minimum value of (N2-N1) is taken as the constraint to design the length-width ratio of the regular quadrilateral: 3n×(n 1)+1=N1; (2a-1)×b÷2=N2; N2-N1≥0; n - the number of steel wires per side of the regular hexagon; a, b - the regular quadrilateral has b rows of steel wires, one row has a steel wire, one row has (a-1) steel wires, and two rows are alternately arranged; if b is odd, the last row has a steel wire, and N2 uses the next integer; In step two, the number of steel wires is N1; In step four, the filling steel wire is prepared, after the forming groove is switched to a regular quadrilateral groove, the steel wire fills the regular quadrilateral cross-section, and there is a gap, and the filling steel wire is used to fill the gap of the regular quadrilateral cross-section.

[0013] Furthermore, the fixed frame is equipped with several drive motors, the output shaft of the drive motor is equipped with gears, and the end of the moving rod is equipped with a rack. The rack and gear mesh, and the drive motor drives the moving rod to slide through the gear and rack.

[0014] Furthermore, the moving part is provided with a limiting groove, through which the moving steel wire passes.

[0015] Furthermore, the type of moving part includes a single-wire moving part, which includes a single-wire motor. The single-wire motor is fixed on one side of the fixed frame. A single-wire cantilever is provided on the output shaft of the single-wire motor. The rotation plane of the single-wire cantilever is perpendicular to the conveying direction of the wire. A limiting groove is provided at the end of the single-wire cantilever, and the moving wire is accommodated in the limiting groove. In step two, a wire guide frame is prepared, and multiple steel wires pass through the wire guide frame, wire splitting frame, traction device and forming device in sequence. For the moving steel wire on the single wire cantilever, the position where the moving steel wire exits the wire guide frame, the rotation center of the single wire cantilever and the position where the moving steel wire enters the traction device are collinear.

[0016] Furthermore, one side of the fixing frame is provided with a side protrusion, on which a vertical slide groove and a vertical drive assembly are provided. A slider is slidably provided in the vertical slide groove. The vertical drive assembly is used to drive the slider to move up and down along the vertical slide groove. A multi-wire motor is provided on the slider. A multi-wire swing arm is provided on the output shaft of the multi-wire motor. The rotation plane of the multi-wire swing arm is perpendicular to the conveying direction of the steel wire. Several limiting grooves are provided on the edge of the multi-wire swing arm, and several moving steel wires are respectively accommodated in several limiting grooves.

[0017] Furthermore, all drive motors are located on the same side of the fixed frame, and all moving parts are located on the opposite side of the drive motors.

[0018] Furthermore, the forming device includes a square clamp and a regular polygon clamp. When the square clamp holds the steel wire, it forms a square groove, and when the regular polygon clamp holds the steel wire, it forms a regular polygon groove.

[0019] This solution also has the following effects: 1. During the design phase, to minimize the gaps in the regular squares, the upper and lower rows of steel wires are staggered, with the number of wires in the two rows differing by 1. Since it is difficult to keep the number of steel wires in the regular hexagon and the regular square completely consistent, the number of steel wires in the regular hexagon is used as the benchmark, and the number of steel wires in the regular square section is taken as the minimum value, provided that it is greater than that in the regular hexagon section. Due to the continuity of the steel wires, the missing steel wires in the regular square section can be filled with filler steel wires. The filler steel wires are only used to fill the gaps in the regular square section, and the filler steel wires can be temporarily fixed with tools such as straps.

[0020] When calculating the number of steel wires, first determine the side length of the regular hexagonal cross section, and then determine the number of steel wires N1; then, adjust the length-to-width ratio of the regular quadrilateral cross section so that the number of steel wires is closest to N1, thereby minimizing the variation of steel wires during the cross section transition and minimizing the weak points formed by the filling steel wires.

[0021] With this design and movement method, the steel wire at the center of the cross section moves at most one unit (the distance of one steel wire diameter). The main moving steel wires are all located at the edge of the cross section, and the horizontal movement direction of each row of fixed steel wires is the same, minimizing the relative displacement. This minimizes the variation inside the cross section, thereby ensuring that the core part of the cross section has almost no problems such as excessive local gaps or misalignment between steel wires.

[0022] 2. In order to facilitate the traction of the moving steel wire onto the moving part, this solution sets an open limiting groove on the moving part to accommodate it; however, during the movement of the moving part, the position where the moving steel wire exits the guide frame and the position where the moving steel wire enters the forming device are not easy to move. Therefore, under the pull at these two positions, the moving steel wire is prone to relative displacement with the limiting groove, and may even easily dislodge from the groove, thereby interrupting the cable forming process and reducing production efficiency.

[0023] In this solution, the moving part is made in a rotating mode. The rotation drives the moving steel wire to move vertically. Since the position where the moving steel wire exits the guide frame, the rotation center of the single wire cantilever, and the position where the moving steel wire enters the traction device are collinear, the tension of the moving steel wire is always directed towards the rotation center of the single wire cantilever. The tension of the moving steel wire will not generate eccentric force, thereby avoiding relative displacement between the moving steel wire and the limiting groove, ensuring production accuracy, and thus ensuring the accuracy of the forming position of the moving steel wire. This avoids problems such as excessive local gaps in the strands and misalignment between steel wires, ensuring the stability of the strand quality.

[0024] 3. When the cross-section changes, the relative positions of some adjacent moving steel wires do not change, and they can move together, thereby increasing the efficiency of movement. Therefore, this solution designs a vertical drive component to drive multiple moving steel wires to move together. Since the overall movement distance of multiple steel wires is usually large, if the setting method of a single wire moving component is referenced, the rotation radius would be too large, requiring a thicker support structure and a more powerful motor, which would significantly increase the cost and the frequency of failure. Therefore, the vertical drive component adopts a combination of rotation and vertical movement, driving adjacent moving steel wires to rotate together and move vertically to the designed position, thereby ensuring the efficiency of movement. Attached Figure Description

[0025] Figure 1 Flowchart for an embodiment; Figure 2 This is a schematic diagram of the production line for an example. Figure 3This is a schematic diagram of the regular quadrilateral arrangement in the embodiment; Figure 4 This is a schematic diagram of the regular polygonal arrangement in the embodiment; Figure 5 This is a schematic diagram of the overlapping area of ​​the regular polygonal section and the regular quadrilateral section in an embodiment. Figure 6 This is a schematic diagram of the wire splitting frame corresponding to the regular polygonal cross-section in the embodiment; Figure 7 This is a cross-sectional view of the wire splitter corresponding to the regular quadrilateral cross section of the embodiment; Figure 8 This is a cross-sectional view of the wire splitter as an example. Detailed Implementation

[0026] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: 1. Fixed steel wire; 2. Moving steel wire; 3. Filling steel wire; 4. Wire feeding reel; 5. traction device; 6. forming device; 7. Wire separating frame; 8. Fixed frame; 81. Standard rod; 82. Moving rod; 83. Drive cavity; 84. Gear; 85. Rack; 86. Outer flange; 87. Limiting part; 88. Single wire cantilever; 91. Side protrusion; 92. Slide groove; 93. Multi-wire swing arm; 94.

[0027] Example High-strength cable strand forming process, the process is as follows: Figure 1 As shown, it includes the following steps: Step 1: Design the regular polygonal and quadrilateral cross-sectional segments of the cable strands; determine the overlapping area of ​​the regular polygonal and quadrilateral cross-sections, such as... Figure 5 As shown, the steel wire located in the overlapping area is the fixed steel wire 1, and the remaining steel wires are the movable steel wires 2; Calculate the relationship between the number of wires N1 in the hexagonal cross-section and the number of wires N2 in the square cross-section using the following formula. Using the minimum value of (N2-N1) as a constraint, design the aspect ratio of the square: 3n×(n 1) + 1 = N1; (2a-1)×b÷2=N2; N2-N1≥0; n - The number of wires on each side of a regular hexagon; a, b - A regular quadrilateral has b rows of steel wires. One row has a steel wires, and the other row has (a-1) steel wires. The two rows are arranged alternately. If b is an odd number, then the last row has a steel wires. N2 is rounded up to the nearest integer. In this embodiment, as Figure 4 As shown, if n=5, then N1=61; Figure 3 As shown, if a=7 and b=10, then N2=65; like Figures 3-5 As shown, Figure 3 The regular quadrilateral is rotated 60° clockwise to coincide with the regular hexagon. The overlapping area is determined. Fixed wire 1 is divided into several rows. The transition method from the regular polygonal section to the regular quadrilateral section is designed, constrained by the horizontal movement of each row of fixed wire 1 and minimizing the movement distance of the moving wire 2. The horizontal movement direction of each row of fixed wire 1 is the same. If a moving wire 2 can achieve the section transition simply by horizontal movement, then this moving wire 2 is considered as a fixed wire 1 in subsequent steps. Figure 5 The second-to-last steel wire from the right in the middle row, although outside the overlapping area, can achieve cross-sectional transition simply by horizontal movement, and therefore can be regarded as fixed steel wire 1.

[0028] like Figure 5 As shown, the arrows indicate the direction of movement of the steel wire transitioning from a regular polygonal section to a regular quadrilateral section, the dashed circles indicate the steel wire after movement, the two horizontal arrows in the bottom two rows indicate that the fixed row needs to move as a whole in the same direction, the last row moves 2 units, the second to last row moves 1 unit, one unit refers to the distance of one steel wire diameter, the remaining two arrows indicate the direction of movement of the moving steel wire 2, and the arc arrow indicates the direction of movement of the three moving steel wires 2 together.

[0029] Step 2: Prepare the wire feeding reel 4, wire guide frame 5, wire separating frame 8, traction device 6, and forming device 7, as follows: Figure 2 As shown, the wire feeding reel 4 feeds out the steel wire. The number and arrangement of the wire feeding reels 4 in the figure are for illustrative purposes only. Multiple steel wires are sequentially passed through the wire guide frame 5, the wire separating frame 8, the traction device 6, and the forming device 7, and are continuously conveyed under the action of the traction device 6. The number of steel wires is N1. The wire guide frame 5 and the traction device 6 are existing technologies. In this embodiment, the traction device 6 is a tracked traction machine (not shown in the figure), which conveys the steel wire by clamping it with two tracks. The wire guide frame 5 is a centralized guiding structure with multiple guide holes for concentrating the steel wire. The existing technology will not be described in detail here.

[0030] like Figures 6-8 As shown, the wire separating frame 8 includes a fixed frame 81, which is a rectangular frame. The fixed frame 81 is equipped with several movable parts and several horizontally arranged bars, which are horizontal in direction and perpendicular to the wire conveying direction. Figure 8As shown, the horizontal bar includes a standard bar 82 and a movable bar 83. The left end of the movable bar 83 is inserted into the fixed frame 81 and is rotatably and horizontally slidably connected to the fixed frame 81. The right end of the movable bar 83 is provided with a drive unit, which includes a drive motor. The fixed frame 81 has a drive cavity 84. The drive motor is bolted into the drive cavity 84 (not shown in the figure). The output shaft of the drive motor is bolted with a gear 85. The gear 85 meshes with a rack 86. The rack 86 is a rectangular bar. The rack 86 and the drive cavity 84 are clearance-fitted and horizontally slidably connected. The right end of the movable bar 83 is integrally formed with an outer flange 87. The right end of the movable bar 83 is inserted into the left end of the rack 86 and the outer flange 87 is inserted into the rack 86. The outer flange 87 is used to prevent the movable bar 83 from sliding out of the rack 86. The rack 86 and the movable bar 83 are rotatably connected. Several rows of fixed steel wires 1 correspond to several horizontal bars, with each row of fixed steel wires 1 passing over its corresponding horizontal bar. The bottom two rows of fixed steel wires 1 correspond to movable bars 83, and the remaining rows of fixed steel wires 1 correspond to standard bars 82. Figure 6 As shown, each standard rod 82 and each moving rod 83 has two integrally formed limiting parts 88. The fixed steel wire 1 on the standard rod 82 or the moving rod 83 is restricted between the two limiting parts 88. The limiting parts 88 can rotate with the standard rod 82 or the moving rod 83. Therefore, the size of the limiting parts 88 and the interference with other rows of steel wires need to be considered. The volume cannot be too large or there needs to be a sufficient gap between the two rows of steel wires. If the volume cannot be too large, the surface of the limiting parts 88 needs to be roughened, such as by setting concave and convex stripes or optimizing the shape so that the shape of the limiting parts 88 fits the appearance of the steel wire better.

[0031] Each moving component corresponds to at least one moving steel wire 2. The moving component is used to drive the moving steel wire 2 to move vertically. In this embodiment, the moving component includes a single-wire moving component and a multi-wire moving component. The single-wire moving component includes a single-wire motor. The single-wire motor is fixed inside the left side of the fixed frame 81. The output shaft end of the single-wire motor passes through the fixed frame 81 and is bolted to a single-wire cantilever 91. The rotation plane of the single-wire cantilever 91 is perpendicular to the conveying direction of the steel wire. A limit groove is opened at the end of the single-wire cantilever 91, and a moving steel wire 2 is accommodated in the limit groove. For the moving steel wire 2 on the single-wire cantilever 91, the position where the moving steel wire 2 passes through the guide frame 5, the rotation center of the single-wire cantilever 91, and the position where the moving steel wire 2 passes through the traction device 6 are collinear.

[0032] like Figure 6 , Figure 7 As shown, the left side of the fixing frame 81 has an integrally formed side protrusion 92, and a vertical groove 93 is opened on the side protrusion 92. A slider (not shown in the figure) is slidably installed in the vertical groove 93. The slider is inverted T-shaped to prevent the slider from disengaging from the groove 93. The shape of the groove 93 matches the slider. The multi-wire moving component includes a multi-wire swing arm 94 and a vertical drive assembly. The vertical drive assembly includes a sliding motor and a lead screw pair. The lead screw pair is installed in a slide groove 93 (not shown in the figure). The sliding motor and the single-wire motor are fixed in the same way as the drive motor, both bolted to the cavity inside the fixing frame 81. The sliding motor drives the slider to slide in the slide groove 93 through the lead screw pair. The implementation of the lead screw pair is existing technology and will not be described in detail. The multi-wire motor is bolted to the slider, and the multi-wire swing arm 94 is bolted to the output shaft of the multi-wire motor. The rotation plane of the multi-wire swing arm 94 is perpendicular to the wire conveying direction. The edge of the multi-wire swing arm 94 has three limiting grooves, and the three moving wires 2 are respectively accommodated in the three limiting grooves. All limiting grooves have a rotating shaft at the bottom. The two ends of the rotating shaft are inserted into the side wall of the limiting groove and rotatably connected to the side wall of the limiting groove. The moving wires 2 are supported on the rotating shafts. The shape of the limiting grooves is set according to the actual situation to limit the moving wires 2 and prevent them from sliding out of the limiting grooves.

[0033] The molding device 7 includes a molding groove, which can switch between two forms: a regular polygonal groove and a regular square groove. Specifically, the forming device 7 includes a square clamp and a regular polygon clamp. When the square clamp holds the steel wire, it forms a square groove. When the regular polygon clamp holds the steel wire, it forms a regular polygon groove. The forming device 7 is not the focus of this patent. Understanding the implementation method is sufficient.

[0034] Step 3, as follows Figure 6 As shown, the positions of each moving rod 83 and each moving part in the wire splitting frame 8 are set so that the arrangement of all fixed steel wires 1 is consistent with the regular polygonal cross section, and the vertical position of all moving steel wires 2 is consistent with the regular polygonal cross section. The forming groove is switched to a regular polygonal groove. Steel wires are continuously conveyed until the steel wire of the regular quadrilateral cross section enters the forming device 7. Step 4, as follows Figure 7 As shown, the moving rod 83 is moved horizontally so that the arrangement of all fixed steel wires 1 is consistent with the square cross-section; the moving part drives the corresponding moving steel wire 2 to move vertically so that the vertical position of all moving steel wires 2 is consistent with the square cross-section; at the same time, the forming groove is switched to a square groove; the filling steel wire 3 is prepared. Since N2-N1=65-61=4 is greater than 0, there are 4 gaps after the steel wire fills the square cross-section, as shown. Figure 3 As shown, the four gaps in the regular quadrilateral cross-section are filled using filler wire 3. The filling method is either manual or a robotic arm. The robotic arm is existing technology and will not be described further. The wire is continuously fed until the wire of the regular polygonal cross-section segment enters the forming device 7. Step 5: Repeat steps 3 and 4 until the entire strand is formed.

[0035] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A high-strength cable strand forming process, characterized in that, Includes the following steps: Step 1: Design the regular polygonal and quadrilateral cross-sections of the cable strands; determine the overlapping area of ​​the regular polygonal and quadrilateral cross-sections. The steel wires located within the overlapping area are fixed steel wires, and the remaining steel wires are movable steel wires. Step 2: Prepare the wire splitting frame, traction device, and forming device, and pass multiple steel wires through the wire splitting frame, traction device, and forming device in sequence; The wire splitting frame includes a fixed frame, on which are provided several movable parts and several horizontally arranged bars; the fixed steel wires are divided into several rows, each corresponding to several horizontal bars, and each row of fixed steel wires passes through the corresponding horizontal bar; the horizontal bar includes a movable rod, on which are provided two limiting parts, and the fixed steel wires located on the movable rod are restricted between the two limiting parts, and the movable rod is horizontally slidably arranged on the fixed frame; Each moving component corresponds to at least one moving steel wire, and the moving component is used to drive the moving steel wire to move vertically; The forming device includes a forming groove, which can switch between two forms: a regular polygonal groove and a regular square groove; Step 3: Set the positions of each moving rod and each moving part in the wire splitting frame so that the arrangement of all fixed steel wires is consistent with the regular polygonal cross section, and the vertical position of all moving steel wires is consistent with the corresponding vertical position of the regular polygonal cross section. Switch the forming groove to a regular polygonal groove. The traction device continues to transport steel wires until the steel wire of the square cross section enters the forming device. Step 4: Move the moving rod horizontally so that the arrangement of all fixed steel wires is consistent with the square cross-section; move the moving part to drive the corresponding moving steel wire vertically so that the vertical position of all moving steel wires is consistent with the square cross-section; at the same time, switch the forming groove to a square groove; continue to feed steel wires until the steel wire of the regular polygon cross-section enters the forming device. Step 5: Repeat steps 3 and 4 until the entire strand is formed.

2. The high-strength strand forming process according to claim 1, characterized in that: In step one, the fixed steel wires are divided into several rows. With the constraint of moving each row of fixed steel wires horizontally and minimizing the moving distance of the moving steel wires, the cross-section transition method from the regular polygon cross-section to the regular quadrilateral cross-section is designed. The horizontal movement direction of each row of fixed steel wires is the same. If there is a moving steel wire that can achieve the cross-section transition by moving only horizontally, then the moving steel wire is regarded as a fixed steel wire in subsequent steps.

3. The high-strength strand forming process according to claim 2, characterized in that: In step one, the regular polygonal section is a regular hexagonal section. The relationship between the number of wires N1 in the regular hexagonal section and the number of wires N2 in the regular quadrilateral section is calculated using the following formula. With the minimum value of (N2-N1) as a constraint, the aspect ratio of the regular quadrilateral is designed: 3n×(n 1) + 1 = N1; (2a-1)×b÷2=N2; N2-N1≥0; n - The number of wires on each side of a regular hexagon; a, b - A regular quadrilateral has b rows of steel wires. One row has a steel wires, and the other row has (a-1) steel wires. The two rows are arranged alternately. If b is an odd number, then the last row has a steel wires. N2 is rounded up to the nearest integer. In step two, the number of steel wires is N1; In step four, prepare the filling wire. After the forming groove is switched to a regular square groove, there will be a gap after the wire fills the regular square section. Use the filling wire to fill the gap of the regular square section.

4. The high-strength strand forming process according to claim 3, characterized in that: The fixed frame is equipped with several drive motors, the output shaft of the drive motor is equipped with gears, and the end of the moving rod is equipped with a rack. The rack and gear mesh, and the drive motor drives the moving rod to slide through the gear and rack.

5. The high-strength strand forming process according to claim 4, characterized in that: The moving part is provided with a limiting groove, and the moving steel wire passes through the limiting groove.

6. The high-strength strand forming process according to claim 5, characterized in that: The type of moving part includes a single wire moving part, which includes a single wire motor. The single wire motor is fixed on one side of the fixed frame. A single wire cantilever is provided on the output shaft of the single wire motor. The rotation plane of the single wire cantilever is perpendicular to the conveying direction of the wire. A limiting groove is provided at the end of the single wire cantilever, and the moving wire is accommodated in the limiting groove. In step two, a wire guide frame is prepared, and multiple steel wires pass through the wire guide frame, wire splitting frame, traction device and forming device in sequence. For the moving steel wire on the single wire cantilever, the position where the moving steel wire exits the wire guide frame, the rotation center of the single wire cantilever and the position where the moving steel wire enters the traction device are collinear.

7. The high-strength strand forming process according to claim 6, characterized in that: One side of the fixed frame is provided with a side protrusion, on which a vertical slide groove and a vertical drive assembly are provided. A slider is slidably provided in the vertical slide groove. The vertical drive assembly is used to drive the slider to move up and down along the vertical slide groove. A multi-wire motor is provided on the slider. A multi-wire swing arm is provided on the output shaft of the multi-wire motor. The rotation plane of the multi-wire swing arm is perpendicular to the conveying direction of the steel wire. Several limiting grooves are provided on the edge of the multi-wire swing arm. Several moving steel wires are respectively accommodated in several limiting grooves.

8. The high-strength strand forming process according to claim 7, characterized in that: All drive motors are located on the same side of the fixed frame, and all moving parts are located on the opposite side of the drive motors.

9. The high-strength strand forming process according to claim 8, characterized in that: The forming device includes a square clamp and a regular polygon clamp. When the square clamp holds the steel wire, it forms a square groove, and when the regular polygon clamp holds the steel wire, it forms a regular polygon groove.

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