Steel wire pre-deformation rope forming process based on stranding DTU machine tool

Abstract

The invention discloses a steel wire pre-deformation rope forming process based on a stranding DTU machine tool, which comprises the following steps: S1, after a plurality of outer-layer steel wires come out from an outer-layer spool, the steel wires pass through a tension swing rod and a traction wheel, and then pass through a pre-deformation roller of a pre-deformation device on an outer-layer large branching disc, the steel wires are spirally bent, and the outer-layer steel wires are subjected to rope forming; and the back passes through a branching hole A in the outer-layer large branching disc. And S2, after a plurality of core strand steel wires come out of the core strand spool, the tension of the core strand steel wires is stabilized through a tension swing rod, and the core strand steel wires penetrate through a branching hole B in a core strand small branching disc and then penetrate through a core strand false twister. And S3, after the outer-layer steel wires and the core strand steel wires in the S1 and the S2 enter a pressing die at the same time to form ropes, the ropes pass through a rope forming false twister and then enter a straightener to eliminate stress to form finished steel cords, and the finished steel cords are wound on a finished spool. The steel wire is in direct contact with the working face of the pre-deformation roller to generate deformation, circle deformation of different diameters is formed, the cord thread rope forming effect is facilitated, and the steel wire cannot be loosened due to the fact that the transverse stress on the cord thread is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel cord production, and particularly relates to a steel wire pre-forming rope process based on a twisting DTU machine tool. BACKGROUND

[0002] In the automobile tire manufacturing process, the steel cord is an important component of the tire framework material, and the quality and performance thereof directly affect the service life and safety of the tire. In the steel cord product industry, the DTU machine tool is widely used by steel cord production enterprises due to the fact that a plurality of spools can be placed therein, high efficiency and high product quality. The technical index of the steel cord requires that the cord twisting is tight, and the looseness is one of the important indexes of the steel cord, and plays a key role in the quality of the subsequent tire calendering. At present, the mainstream production of the DT machine tool is the 1+6+12, 19cc, 3+6 geometric structure specification, and specific reference is made to the drawings in the specification Figure 1 、 2 The twisting tension in the twisting process is small, and the stress between the steel wires can be eliminated by the straightener after the twisting is completed, so that the cord looseness reaches the qualified level. For the geometric structure of the specification, for example, 2+7, specific reference is made to the drawings in the specification Figure 3 The straightener eliminates the stress while also extruding the steel wires from the original position, causing quality problems such as core turning and small particles. The principle of eliminating stress by the straightener is that the cord is repeatedly bent and extruded by the guide wheels at the intersection position on both sides to eliminate the stress.

[0003] At present, the DTU machine tool still has many problems. Taking the 19cc specification steel cord structure as an example: the performance of the DTU machine tool virtual twister on the 19cc structure is not obvious (the virtual twister: the cord is twisted and untwisted by rotating the cord to eliminate the stress of the cord from the inside, and the torsion is adjusted), and the stress can only be eliminated by the straightener to control the torsion. When the straightener pressure is too large, the cord torsion is qualified, but the looseness is not good; when the straightener pressure is too small, the cord looseness is qualified, but the torsion is not qualified; as the raw material spool of the DTU machine tool is gradually consumed, the weight difference between the full-disk spool and the bottom spool of the weight disk is large, and the wire pay-off tension will fluctuate with the change in the weight of the raw material. Therefore, the DTU machine tool for producing the specification requires experienced operators, and the performance needs to be tested every time a disk is completed, and the straightener needs to be frequently adjusted according to the fluctuating tension, thereby reducing the production efficiency. SUMMARY

[0004] The application aims to provide a steel wire pre-deformation forming rope process based on a twisting DTU machine tool, which deforms the steel wire through direct contact with the working surface of a pre-deformation roller, forms circle deformation with different diameters, facilitates the cord forming rope effect, and reduces the transverse stress of the steel wire on the cord, so that the steel wire does not become loose and the problems in the background art are solved.

[0005] To achieve the above-mentioned purpose, the application provides the following technical scheme. A steel wire pre-deformation forming rope process based on a twisting DTU machine tool, comprising the following steps: S1, after a plurality of outer layer steel wires are discharged from an outer layer spool, the outer layer steel wires pass through a tension swing lever and a traction wheel, then pass through a pre-deformation roller of a pre-deformation device on an outer layer large dividing disc, and form spiral bending, and then pass through a dividing hole A on the outer layer large dividing disc.

[0006] S2, after a plurality of core strand steel wires are discharged from a core strand spool, the core strand steel wires pass through a tension swing lever to stabilize tension, pass through a dividing hole B on a core strand small dividing disc, and pass through a core strand virtual twister.

[0007] S3, after the outer layer steel wires and the core strand steel wires in S1 and S2 enter a compression mold to form a rope, the outer layer steel wires and the core strand steel wires pass through a virtual twister to form a finished steel cord, and are wound on a finished product spool.

[0008] A further improved scheme of the application is that the pre-deformation device further comprises a support plate connected to the outer layer large dividing disc, the pre-deformation roller is rotatably connected to the support plate, and an arc-shaped adjusting groove is arranged on the support plate with the center of the pre-deformation roller as the center, and the wire guide roller is adjustably connected in the arc-shaped adjusting groove.

[0009] A further improved scheme of the application is that the roller shaft of the pre-deformation roller is connected to the support plate through a bearing, the adjusting rod is slidingly fitted in the arc-shaped adjusting groove, the adjusting rods on the two sides of the support plate are connected with locking nuts, and the wire guide roller is connected to one end of the adjusting rod through a bearing.

[0010] A further improved scheme of the application is that the support plate on the side of the pre-deformation roller is provided with scale lines for adjusting the passing angle of the steel wire.

[0011] A further improved scheme of the application is that the dividing hole A and the dividing hole B are inlaid with wear-resistant rings.

[0012] The application has the following beneficial effects: The steel wire pre-deformation forming rope process based on the twisting DTU machine tool of the application produces deformation through the direct contact of the steel wire with the working surface of the pre-deformation roller, forms circle deformation of different diameters, facilitates the cord forming rope effect, and compared with the steel wire directly twisted into a cord, the pre-deformed steel wire enters the twisting point position to be twisted into a cord, and since the shape bending conforms to the geometric position state after the cord forming rope, the transverse stress of the steel wire on the cord is reduced and loose is not generated.

[0013] The steel wire pre-deformation forming rope process based on the twisting DTU machine tool of the application can also increase the adjustment range of the straightener, and when the production operator adjusts, the straightener pressure-in amount is not worried to be too large to cause the finished cord to be loose.

[0014] The steel wire pre-deformation forming rope process based on the twisting DTU machine tool of the application can be disassembled and replaced, adopts the general structure of steel cord to save maintenance cost. The angle of the wire guide wheel can be adjusted to change the deformation amount of the steel wire, and facilitate adjustment and operation in the test process. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a sectional view of a 1+6+12 structure steel cord.

[0016] Figure 2 It is a sectional view of a 3+6 structure steel cord.

[0017] Figure 3 It is a sectional view of a 2+7 structure steel cord.

[0018] Figure 4 It is a schematic view of a steel wire directly twisted into a cord.

[0019] Figure 5 It is a schematic view of the rope forming process of the application.

[0020] Figure 6 It is a schematic view of the pre-deformation device structure of the application.

[0021] Figure 7 It is a schematic view of the steel wire passing through the pre-deformation device of the application.

[0022] Figure 8 It is a schematic view of the steel wire twisted into a cord after pre-deformation.

[0023] In the diagram: 1-Core strand I-beam reel, 2-Outer layer I-beam reel, 3-Core strand steel wire, 4-Core strand small splitter reel, 5-Outer layer steel wire, 501-Bending, 6-Core strand false twister, 7-Pre-deformer, 701-Support plate, 702-Pre-deformation roller, 703-Arc-shaped adjusting groove, 704-Wire guide wheel, 705-Scale line, 8-Outer layer large splitter reel, 801-Wear-resistant ring, 9-Rope forming point, 10-Pressure die, 11-Rope forming false twister, 12-Straightener, 13-Finished I-beam reel. Detailed Implementation

[0024] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0025] Example 1: As Figures 1 to 8 As shown, a wire pre-transformation rope forming process based on a twisting DTU machine tool includes the following steps: Step 1: After several outer steel wires 5 emerge from the outer I-beam reel 2, they pass through the tension swing arm and traction wheel, and then through the pre-deformation roller 702 of the pre-deformer 7 on the outer large dividing disc 8. The outer steel wires 5 then form a spiral bend 501. The state of the outer steel wires 5 after passing through the pre-deformer 7 is shown in the image. Figure 7 The red line goes up and then passes through the branch hole A on the outer layer large branch plate 8.

[0026] Step 2: After several core strand steel wires 3 come out of the core strand I-beam wheel 1, the tension is stabilized by the tension swing rod, and they pass through the branching hole B on the core strand small branching disc 4 and then through the core strand false twister 6.

[0027] In step three, the outer steel wire 5 and the core steel wire 3 from steps one and two simultaneously enter the pressing mold 10 to form a rope. After passing through the rope forming twister 11, they enter the straightener 12 to eliminate stress and form the finished steel cord, which is then wound onto the finished I-beam reel.

[0028] It also includes a support plate 701, which is connected to the outer large dividing plate 8. A pre-deformation roller 702 is rotatably connected to the support plate 701, and an arc-shaped adjustment groove 703 is provided on the support plate 701 with the center of the pre-deformation roller 702 as the center. The wire guide wheel 704 is adjustablely connected to the arc-shaped adjustment groove 703.

[0029] The roller shaft of the pre-deformed roller 702 is connected to the support plate 701 through a bearing. The adjusting rod is slidably fitted into the arc-shaped adjusting groove 703. Locking nuts are connected to the adjusting rods on both sides of the support plate 701. The wire guide wheel 704 is connected to one end of the adjusting rod through a bearing.

[0030] The support plate 701 on the side of the pre-deformed roller 702 is provided with scale lines 705 for adjusting the angle of the steel wire.

[0031] Wear-resistant rings 801 are embedded in the branch hole A and branch hole B.

[0032] Along with the traditional process method, the outer straightener 12 is removed on the DTU machine, and the performance of the steel cord product is affected by the outer straightener 12, such as torsion, looseness, flatness, etc. In the case of unchanged other processes, two different machine processes are compared respectively: without considering other product performance, only observing looseness, respectively using the machine with pre-deformation and the machine without pre-deformation to produce 500m sample disc, and detecting whether the cord has dislocation defect. After many test verifications, it is found that: the steel cord products produced in the two cases, such as Figure 8 , the machine with pre-deformation device 7 does not have looseness phenomenon; such as Figure 4 , the machine without pre-deformation device 7 has serious looseness phenomenon.

[0033] Table 1: Looseness ratio of steel cord produced by machine with and without pre-deformation device Item Unit Experiment group 1 Experiment group 2 Pre-deformer / With pre-deformer Without pre-deformer Loose ratio % 0 100 Table 2: Looseness ratio of steel cord produced by machine with different angle pre-deformation rollers Item Unit Experiment group 1 Experiment group 2 Experiment group 3 Pre-deformation adjustment amount (angle) / Maximum 140° 110° Minimum 90° Loose ratio % 0 0 10 Note: The looseness ratio is the probability of each 10m steel cord according to the national standard detection of looseness qualified.

[0034] Combining Table 1 and Table 2, it can be concluded that: in the machine of the DTU machine tool, without considering the performance of other products, the machine with pre-deformation device 7 will have a good effect on looseness, and the greater the pre-deformation adjustment amount, the smaller the probability of looseness.

[0035] Therefore, from the technical point of view: the present application solves the problem that the DTU machine tool cannot produce geometrically irregular specifications, which makes up for the defect that the straightener 12 cannot adjust the looseness of the cord. From the production point of view: the present application increases the adjustment range of the straightener 12 in production, reduces the adjustment frequency of the production operator, and improves the production efficiency.

[0036] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent transformation or modification made according to the spirit and essence of the present application should be covered within the protection scope of the present application.

Claims

1. A steel wire pre-forming into a rope process based on a stranding DTU machine, characterized in that It comprises the following steps: S1, several outer layer steel wires (5) are formed into spiral bending (501) after passing through the pre-deformation roller (702) of the pre-deformation device (7) on the outer layer large dividing disc (8) after coming out from the outer layer spool (2), passing through the tension swing lever and the traction wheel, and then passing through the dividing hole A on the outer layer large dividing disc (8); S2, several core wire (3) are passed through the dividing hole B on the core wire small dividing disc (4) and the core wire virtual twister (6) after passing through the tension swing lever to stabilize the tension after coming out from the core wire spool (1); S3, the outer layer steel wire (5) and the core wire (3) in S1 and S2 are simultaneously passed through the virtual twister (11) after being formed into a rope in the pressing die (10), and then passed through the straightener (12) to eliminate the stress to form the finished steel cord, and then wound on the finished product spool.

2. A steel wire pre-forming into a rope process based on a stranding DTU machine, according to claim 1, characterized in that: The pre-deformation device (7) further comprises a support plate (701) connected to the outer layer large dividing disc (8), the pre-deformation roller (702) is rotatably connected to the support plate (701), and the support plate (701) is provided with an arc-shaped adjusting groove (703) with the center of the pre-deformation roller (702) as the center, and the wire guide roller (704) is adjustably connected in the arc-shaped adjusting groove (703).

3. A steel wire pre-forming into a rope process based on a stranding DTU machine, according to claim 2, characterized in that: The roller shaft of the pre-deformation roller (702) is connected to the support plate (701) through a bearing, the adjusting rod is slidingly fitted in the arc-shaped adjusting groove (703), the adjusting rod on the two sides of the support plate (701) is connected with a locking nut, and the wire guide roller (704) is connected to one end of the adjusting rod through a bearing.

4. A steel wire pre-forming into a rope process based on a stranding DTU machine, according to claim 2, characterized in that: The support plate (701) on the side of the pre-deformation roller (702) is provided with a scale line (705) for adjusting the passing angle of the steel wire.

5. A steel wire pre-forming into a rope process based on a stranding DTU machine, according to claim 1, characterized in that: The dividing hole A and the dividing hole B are embedded with wear-resistant rings (801).

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