Rope forming process of 5*1 high lay length steel wire cord

Abstract

The invention relates to a rope forming process of a 5 * 1 high lay length steel wire cord, which is characterized in that five steel wires come out from a spool and enter a rope forming frame through a tension swing rod, and the shape and stress of the steel wires are preliminarily adjusted through a pre-deformation roller on the rope forming frame, and a rope is formed through the pre-deformation roller, a five-hole branching disc, a pre-deformation sheet, a pressing die limit, a straightener and a false twister. The steel wire is deformed twice before being twisted by changing the rope forming angle of the steel wire and adding a mode of pre-deforming the steel wire once, so that the stress distribution of the steel wire in the twisting process is improved, the rope forming quality of the cord thread is influenced, the rope forming quality of the 5 * 1 high lay length cord thread is improved, and the large-scale production condition can be met.

Description

TECHNICAL FIELD

[0001] The present application relates to high twist steel cord rope technology, in particular to a 5x1 high twist steel cord rope forming process. BACKGROUND

[0002] At present, steel cord as a skeleton material has been maturely applied in tires, and 5x1 is a widely used specification in the field of steel cord, but in the production process, due to the particularity of its specification, the structure has a large central gap, and the misalignment phenomenon is easy to occur, which is particularly prominent on the 5x1 specification with high twist distance. The increased twisting distance causes uneven stress distribution during twisting, and the insufficient standard rope forming frame limits stress transmission. Therefore, it is difficult to achieve the standard rope forming state during twisting, and often one steel wire is extruded out of the original position, causing misalignment. At present, there is no fixed process for this structure in the industry, and the commonly used method is to use a 6-hole dividing disc to increase the gap on one side of the steel wire before twisting, and reserve space for the steel wire to extrude during twisting, so as to meet the quality requirements of rope forming. Note: The function of the dividing disc is to gather multiple steel wires, and make them become a strand during twisting. The rope forming frame (consisting of a six-hole dividing disc and a pre-deformation piece): install the dividing disc, and the pre-deformation piece: make the steel wire keep flat and uniform inside the boat and pass through the dividing disc. The existing process: after the five steel wires come out from the spool, they pass through the tension lever, five-hole dividing disc, pre-deformation piece, pressing die, straightener and virtual twister in turn to form a rope.

[0003] In the existing process, there are still many problems, such as the deviation of the center position of the steel wire caused by the 6-hole dividing disc, and the misalignment of the steel wire in the batch production process, which makes it difficult to achieve the ideal rope forming state stably. Therefore, this method is unstable in process quality in large-scale production. Note: The function of the pre-deformation piece is to make the steel wire reach a curved state before rope forming, and achieve the ideal rope forming state during twisting.

[0004] Therefore, the current process method cannot ensure stable rope forming quality, and there may be misalignment of the steel wire; at the same time, due to the particularity of the structure, the process personnel need to adjust frequently when the vehicle is running. Therefore, a new rope forming process is needed to ensure the stability of process and product quality. SUMMARY

[0005] To solve the above problems, the present application provides a 5x1 high twist steel cord rope forming process, which changes the steel wire rope angle and increases the pre-deformation of the steel wire once to make the steel wire twist twice before twisting, improves the stress distribution of the steel wire during twisting, and thus affects the rope forming quality of the cord. This method improves the rope forming quality of 5x1 high twist cord, and can meet the large-scale production conditions.

[0006] In order to achieve the above object, the present application adopts the following technical scheme: a 5x1 high-twist-pitch steel cord rope forming process, after 5 steel wires come out from the spool, pass through the tension swing lever, enter the rope forming frame, and pass through the pre-deformation rollers on the rope forming frame to preliminarily adjust the shape and stress of the steel wires, the pre-deformation rollers, the 5-hole wire distributor, the pre-deformation piece, the mold limit, the straightener, and the virtual twister.

[0007] On the basis of the above scheme, as a preferred, the 5-hole wire distributor, the pre-deformation piece, and the mold are fixed on the L-shaped base, the L-shaped base includes a horizontal section and a vertical section fixed on the right end of the horizontal section, the horizontal section and the vertical section form an L shape, the 5-hole wire distributor is fixed on the left end of the horizontal section, and the mold is fixed on the upper end of the vertical section.

[0008] On the basis of the above scheme, as a preferred, the 5-hole wire distributor includes a vertical plate and a horizontal plate fixed on the lower end of the vertical plate, the vertical plate is provided with a pre-deformation piece mounting hole, and 5 through holes are uniformly arranged on the circumference of the pre-deformation piece mounting hole to form the 5-hole wire distributor.

[0009] On the basis of the above scheme, as a preferred, the horizontal plate is provided with flanges on both sides of the bottom, the flanges are clamped on the horizontal section, the horizontal plate is provided with a strip-shaped hole in the middle, the length direction of the strip-shaped hole is the left-right direction, and the horizontal plate is fixed on the horizontal section by the locking bolt passing through the strip-shaped hole.

[0010] On the basis of the above scheme, as a preferred, the pre-deformation piece includes a first 5-tooth pre-deformation piece, a second 5-tooth pre-deformation piece, and a third 5-tooth pre-deformation piece fixed on the vertical plate by screws or bolts, the teeth slots on the first 5-tooth pre-deformation piece, the second 5-tooth pre-deformation piece, and the third 5-tooth pre-deformation piece are staggered, and the first 5-tooth pre-deformation piece and the vertical plate, the first 5-tooth pre-deformation piece and the second 5-tooth pre-deformation piece, the second 5-tooth pre-deformation piece and the third 5-tooth pre-deformation piece, and the third 5-tooth pre-deformation piece and the bolt head are all provided with gaskets for controlling the spacing therebetween, and the bolt is fixedly connected with the nut or directly welded by passing through the pre-deformation piece mounting hole on the vertical plate.

[0011] On the basis of the above scheme, as a preferred, the rope forming frame includes a rope forming base and a rope forming frame plate fixed on the rope forming base by bolts, the rope forming frame plate is fixedly installed with five pre-deformation roller assemblies, the pre-deformation roller assembly includes a pre-deformation frame fixedly connected with the rope forming frame plate by bolts, and the pre-deformation frame is fixedly installed with a pre-deformation roller and a wire guide pulley.

[0012] On the basis of the above scheme, as preferred, the distance from the roping frame to the pre-deformation roller is 20 mm; the distance from the pre-deformation roller to the 5-hole line distribution disc is 117 mm; the distance from the 5-hole line distribution disc to the pre-deformation piece is 12 mm; the distance from the pre-deformation piece to the press mold is 40 mm; the length of the press mold is 35 mm, when the steel wire passes through the roping frame, the radius of the circle composed of the steel wire is 45 mm with the center point of the press mold as the center, and when the steel wire passes through the 5-hole line distribution disc, the radius of the circle is 20 mm.

[0013] Compared with the prior art, the present application has the following beneficial effects:

[0014] By changing the steel wire roping angle and increasing the way of pre-deforming the steel wire once, the steel wire is deformed twice before twisting, the stress distribution of the steel wire in the twisting process is improved, thereby affecting the roping quality of the cord, and the roping quality of the 5x1 high-twist cord is improved, which can meet the large-scale production conditions.

[0015] The 5-hole line distribution disc is used without deviation of the center position; the line distribution disc hole position and the pre-deformation piece are linearly arranged in a straight line.

[0016] The existing roping frame structure is changed, and an additional roping frame is added, so that the steel wire is pre-deformed twice before roping, the risk of structural misplacement is reduced, and the roping quality is stably improved.

[0017] The double-roping frame combination improves the misplacement effect caused by the deviation of the roping center point; compared with the original process, the improved process can effectively improve the roping quality and process stability, and reduce the frequent adjustment of the process personnel BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a flowchart of the present application;

[0019] Figure 2 is a schematic view of the spacing cooperation of the roping frame, the 5-hole line distribution disc and the pre-deformation piece of the present application;

[0020] Figure 3 is a perspective view of the 5-hole line distribution disc and the pre-deformation piece Figure 1 ;

[0021] Figure 4 is a perspective view of the 5-hole line distribution disc and the pre-deformation piece Figure 2 ;

[0022] Figure 5 is a structural schematic view of the roping frame of the present application;

[0023] Figure 6 is a structural schematic view of the pre-deformation piece;

[0024] Figure 7 is a structural schematic view of the standard roping frame. DETAILED DESCRIPTION

[0025] The present invention will be further illustrated by the following examples, but the scope of the present invention is not limited thereto.

[0026] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0027] like Figures 1-7 As shown, a rope-forming process for a 5x1 high-twist steel wire cord involves five steel wires 2 emerging from the I-beam reel 1, passing through a tension swing rod, entering the rope-forming frame 3, and then passing through a pre-deformation roller 4. The pre-deformation roller initially adjusts the shape and stress of the steel wires, then they reach a 5-hole distributor 5, and then pass through a pre-deformation plate 6 for secondary deformation adjustment. At this point, the relative horizontal angle between the steel wire and the rope-forming point is reduced to 12° compared to the standard rope-forming frame (6-hole distributor 6). The angle between the steel wire and the rope-forming point is then restricted by a pressure die 7 to form the cord (at this point, the cord reaches a stable rope-forming state with low and uniform residual stress). Then, under the traction of a traction wheel, the cord is continuously bent to reduce some of the stress in the cord wires. A straightener 8 then removes some of the stress, and finally, the cord enters a doubling device 9 to eliminate the remaining stress. After this adjustment, the stress in the cord is completely eliminated, and the rope quality is stable and meets the standard.

[0028] The distance from the rope forming frame to the pre-deformation roller is 20mm; from the pre-deformation roller to the 5-hole distributor is 117mm; from the 5-hole distributor to the pre-deformation sheet is 12mm (shield thickness); from the pre-deformation sheet to the die is 40mm; and the die length is 35mm. When the steel wire passes through the first rope forming frame, the radius of the circle formed by the steel wire with the center point of the die as the center is 45mm. When it passes through the second rope forming frame (5-hole distributor, pre-deformation sheet), the radius of the circle is 20mm.

[0029] The 5-hole distributor, pre-deformed sheet, and pressing mold are fixed on the L-shaped base. The L-shaped base includes a horizontal section 10 and a vertical section 11 fixed at the right end of the horizontal section. The horizontal section and the vertical section form an L-shape. The 5-hole distributor is fixed at the left end of the horizontal section, and the pressing mold is fixed at the upper end of the vertical section.

[0030] The 5-hole wire divider includes a vertical plate 12 and a horizontal plate 13 fixed to the lower end of the vertical plate. The vertical plate has pre-deformation sheet mounting holes, and five through holes 14 are evenly arranged around the circumference of these holes to form a 5-hole wire divider (72-degree included angle). The bottom sides of the horizontal plate have flanges 15, which are used to secure the horizontal section. The middle of the horizontal section has a strip-shaped hole 16, the length direction of which is left-right. Locking bolts pass through the strip-shaped hole to fix the horizontal plate to the horizontal section. The design of the strip-shaped hole facilitates changing the distance between the pressing mold and the pre-deformation sheet, thereby allowing adjustment of the rope-forming point position for different types of steel wire cords. The pre-deformation sheet includes a first 5-tooth pre-deformation sheet 18 and a second 5-tooth pre-deformation sheet 19, which are fixedly mounted on the vertical plate by screws or bolts 17. The teeth 21 on the third 5-tooth pre-deformation piece 20, the first 5-tooth pre-deformation piece, the second 5-tooth pre-deformation piece, and the third 5-tooth pre-deformation piece are arranged alternately. Shims 22 are provided between the first 5-tooth pre-deformation piece and the vertical plate, between the first 5-tooth pre-deformation piece and the second 5-tooth pre-deformation piece, between the second 5-tooth pre-deformation piece and the third 5-tooth pre-deformation piece, and between the third 5-tooth pre-deformation piece and the bolt head to control the interval between them. The bolt passes through the pre-deformation piece mounting hole on the vertical plate and is fixedly connected to the nut or directly welded. When welding is used, the bolt can be replaced by a smooth rod with a head. The five teeth on the first 5-tooth pre-deformation piece and the third 5-tooth pre-deformation piece are aligned with the five holes on the five-hole dividing plate, and the five teeth on the second 5-tooth pre-deformation piece are misaligned with the five holes on the five-hole dividing plate.

[0031] The rope forming frame includes a rope forming base 23 and a rope forming frame plate 24 fixed to the rope forming base by bolts. Five pre-deformation roller assemblies are fixedly installed on the rope forming frame plate. Each pre-deformation roller assembly includes a pre-deformation frame 25 fixedly connected to the rope forming frame plate by bolts. A pre-deformation roller 26 and a wire guide wheel 27 are fixedly installed on the pre-deformation frame. There is a gap between the pre-deformation roller and the wire guide wheel. The wire guide wheel is rotatably installed on the pre-deformation frame. Compared with this application, the standard rope forming frame has an additional rope forming point 28.

[0032] Example 1: Verifying whether changing distance A affects the rope quality of high-twist steel cord. Using traditional methods and a single standard rope-forming frame, the position of the rope-forming point was changed while keeping other processes constant. Comparative experiments were conducted using two different distances A (distance A: the horizontal straight-line distance between the rope-forming point and the wire exit of the rope-forming frame; changing distance A alters the relative horizontal angle between the wire and the rope-forming point). On the same workbench, 500m sample reels were produced using both different processes, and the presence of misalignment defects in the cords was checked.

[0033]

[0034]

[0035] Item Unit Experiment group 3 Experiment group 4 Structure / 5x0.35 OC UT 5x0.35 OC UT Standard roping frame height mm 35 35 A distance mm 90 120 Relative horizontal angle ° 21.25 16.26 Roping defect ratio ％ 14 10

[0036] Note: The rate of cord defect is the number of cord defects per 500 meters of steel cord.

[0037] Conclusion: A smaller relative horizontal angle between the steel wire and the cord point has a good effect on the quality of the cord.

[0038] Example 2, 5x0.38 OC UT and 5x0.35 OC UT two specifications.

[0039] The products produced by the two improved processes are detected, and the performance meets the standard. Now compare the improved process with the previous process: on the same platform, produce 500m sample disc respectively by two different processes, detect whether the cord has dislocation defect:

[0040]

[0041]

[0042]

[0043]

[0044] Note: The rate of cord defect is the number of cord defects per 500 meters of steel cord.

[0045] It should be noted that the above-described embodiments are only used to explain the present application, and do not constitute any limitation on the present application. The present application is described by referring to typical embodiments, but it should be understood that the words used therein are descriptive and explanatory words, rather than limiting words. The present application can be modified as specified within the scope of the claims of the present application, and the present application can be revised within the scope and spirit of the present application. Although the present application described therein relates to specific methods, materials and examples, it does not mean that the present application is limited to the specific examples disclosed therein, on the contrary, the present application can be extended to all other methods and applications with the same function.

Claims

1. A process for the cabling of 5 x 1 high lay length steel cord, characterized in that, 5 steel wires come out from the spool, pass through the tension lever, enter the rope forming frame, and pass through the pre-deformation roller on the rope forming frame to preliminarily adjust the shape and stress of the steel wires.

2. A 5x1 high lay length steel cord rope building process as claimed in claim 1, characterized in that, The 5-hole separating disc, the pre-deformation sheet and the pressing die are fixed on the L-shaped base, the L-shaped base comprises a horizontal section and a vertical section fixed on the right end of the horizontal section, the horizontal section and the vertical section form an L shape, the 5-hole separating disc is fixed on the left end of the horizontal section, and the pressing die is fixed on the upper end of the vertical section.

3. A 5x1 high lay length steel cord rope building process as claimed in claim 2, characterized in that, The 5-hole separating disc comprises a vertical plate and a horizontal plate fixed on the lower end of the vertical plate, the vertical plate is provided with a pre-deformation sheet mounting hole, and five through holes are uniformly arranged on the circumferential direction of the pre-deformation sheet mounting hole to form the 5-hole separating disc.

4. A 5x1 high lay length steel cord rope building process as claimed in claim 3, characterized in that, The horizontal plate is provided with flanges on both sides of the bottom, the flanges are clamped on the horizontal section, the horizontal plate is provided with a strip-shaped hole in the middle, the length direction of the strip-shaped hole is the left-right direction, and the horizontal plate is fixed on the horizontal section by means of the locking bolt passing through the strip-shaped hole.

5. A 5x1 high lay length steel cord rope building process as claimed in claim 4, characterized in that, The pre-deformation sheet comprises a first 5-tooth pre-deformation sheet, a second 5-tooth pre-deformation sheet and a third 5-tooth pre-deformation sheet fixed on the vertical plate by means of screws or bolts, the teeth gaps of the first 5-tooth pre-deformation sheet, the second 5-tooth pre-deformation sheet and the third 5-tooth pre-deformation sheet are staggered, and the first 5-tooth pre-deformation sheet and the vertical plate, the first 5-tooth pre-deformation sheet and the second 5-tooth pre-deformation sheet, the second 5-tooth pre-deformation sheet and the third 5-tooth pre-deformation sheet and the third 5-tooth pre-deformation sheet and the bolt head are all provided with gaskets for controlling the interval therebetween, and the bolt is fixedly connected with the nut or directly welded by passing through the pre-deformation sheet mounting hole on the vertical plate.

6. A 5x1 high lay length steel cord rope building process as claimed in claim 4, characterized in that, The rope forming frame comprises a rope forming base and a rope forming frame plate fixed on the rope forming base by means of bolts, and the rope forming frame plate is fixedly provided with five pre-deformation roller assemblies, the pre-deformation roller assembly comprises a pre-deformation frame fixedly connected with the rope forming frame plate by means of bolts, and the pre-deformation frame is fixedly provided with a pre-deformation roller and a wire guide.

7. A 5x1 high lay length steel cord rope building process as claimed in claim 4, characterized in that, The distance from the rope forming frame to the pre-deformation roller is 20 mm, the distance from the pre-deformation roller to the 5-hole separating disc is 117 mm, the distance from the 5-hole separating disc to the pre-deformation sheet is 12 mm, the distance from the pre-deformation sheet to the pressing die is 40 mm, the length of the pressing die is 35 mm, the radius of the circle formed by the steel wires is 45 mm when the steel wires pass through the rope forming frame with the center point of the pressing die as the center, and the radius of the circle is 20 mm when the steel wires pass through the 5-hole separating disc.

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