CN110373922B

CN110373922B - Production equipment and production method of steel cord

Info

Publication number: CN110373922B
Application number: CN201910427212.0A
Authority: CN
Inventors: 雷彧; 席丙军; 肖海峰
Original assignee: DONGTAI LEIDA STEEL CORD CO LTD
Current assignee: DONGTAI LEIDA STEEL CORD CO LTD
Priority date: 2019-05-22
Filing date: 2019-05-22
Publication date: 2022-07-29
Anticipated expiration: 2039-05-22
Also published as: CN110373922A

Abstract

The invention discloses a steel cord production device, which comprises a plurality of prefabricating devices, wherein each prefabricating device comprises a paying-off spool with tension control, a tension adjusting device and a pair of auxiliary flywheel discs, a plurality of first over-twisting devices are arranged on one side of each prefabricating device, each first over-twisting device comprises a front wire passing wheel, a rear wire passing wheel and a over-twisting assembly with two over-twisting wheels, a wire collecting device is arranged on the other side of each first over-twisting device, each wire collecting device comprises a wire distributing disc with the wire passing wheels, a wire collecting nozzle and a pressing die, a host machine is arranged on the other side of each wire collecting device, and each host machine comprises a pair of main flywheel discs, a traction device, a second over-twisting device, a straightener assembly and a wire collecting device with a wire arranging function.

Description

Production equipment and production method of steel cord

Technical Field

The invention relates to the field of steel cord production, in particular to production equipment and a production method of a steel cord.

Background

The existing steel cord products are basically divided into single-strand (layer) structures such as 2 × 1,3 × 1,5 × 1, etc. according to the structure of the steel wires into ropes; the layered structure such as 3+6,2+7,3+9,3+9+15, etc., the strand structure such as 3 × 2, 3 × 7,3 × 4, 4 × 2, etc., and with the advancement of the steel cord technology level in recent years, new varieties of steel cords are continuously proposed, but mainly focusing on the single-strand (layer) structure and the layered structure, the number of cords in the strand structure is small and small, and for this reason, the strand cord equipment occupancy rate is high, and 3 × 7 × 0.20HE in the prior art, 2 to 3 equipment are needed to produce the strand 0720, and then 1 equipment is matched to produce the finished product; 4 multiplied by 2 multiplied by 0.25HE, 3 to 4 devices are needed to produce the strand 0720, and then 1 device is matched to produce a finished product; if 5 x 2, 7 x 2, etc. are produced, 5-7 or even more machines are required to produce the strands and then produce the finished product. This is obviously uneconomical, not only increasing the plant investment, but also the costs for personnel and intermediate turnover. In view of the saving in production costs, steel cord manufacturers generally do not produce steel cord products with more strands and fewer filaments per strand.

Disclosure of Invention

In order to solve the defects of the prior art, the invention aims to provide production equipment and a production method of a steel cord which can simultaneously complete stranding of stranded wires and stranded wires.

In order to achieve the above object, the present invention adopts the following technical solutions:

the utility model provides a production facility of steel cord, including the prefabricated device of a plurality of, prefabricated device is including the unwrapping wire I-wheel of taking tension control, tension adjusting device and a pair of vice flywheel dish, prefabricated device one side is provided with the first device of twisting with fingers of a plurality of, first device of twisting with fingers is including preceding line wheel, back line wheel and have the subassembly of twisting with fingers of two over-twisting with fingers, first device opposite side of twisting with fingers is provided with the collection line device, the collection line device is including the wire distributing disc that has the line wheel, line concentration is chewed and the moulding-die, the collection line device opposite side is provided with the host computer, the host computer includes a pair of main flywheel dish, draw gear, the second device of twisting with fingers, straightener assembly and take-up device that has the winding displacement function.

Preferably, the number of the prefabricating devices is equal to that of the first twisting devices, the number of the prefabricating devices is 2-10, the plurality of paying-off spools are changed into one, the equipment structure is simplified, the rotating speed of the flywheel disc is improved, the production speed is high, and the noise is low during production.

Preferably, the number of the prefabricating devices is 5-7, so that the tension is better controlled, the tension of each steel wire is ensured to be consistent, and the paying-off state is consistent.

More preferably, the wire collecting device comprises a pre-deformation device for pre-deforming the strands to form certain corrugations, and the deformation amount is adjusted to change the breaking elongation of the finished cord so as to obtain the required breaking elongation of the finished cord.

A steel cord production method by using a steel cord production apparatus, characterized by comprising the steps of: s1, collecting a plurality of wires, and winding 2-3 wet-drawn steel wires with the same diameter on a paying-off spool simultaneously through a godet wheel; s2, prefabrication: a rotary multi-station prefabricating device is adopted to simultaneously complete the prefabrication of a plurality of strands of folded yarns; s3, strand stress relief: a plurality of groups of over-twisting devices are adopted to eliminate residual stress generated by prefabrication twisting; s4, adopting a distributing terminal plate, a pressing die and a wire collecting nozzle with adjustable relative distance to meet the production requirements of various cords with different specifications; s5, determining the speed ratio relation between the flywheel disc of the main machine and the prefabricated flywheel disc, and realizing the production of the lay length of each specification of the stranded rope cord.

Preferably, the aforementioned S2 specifically includes the following steps: placing a paying-off I-shaped wheel which is used for collecting 2-3 steel wires on a paying-off device with a tension control to ensure that the paying-off tension is stable; secondly, 2-3 steel wires on the pay-off I-shaped wheel sequentially pass through the two auxiliary flywheel discs to finish the two twisting of the AB and the CD, wherein the two twisting directions are consistent, namely the auxiliary flywheel discs rotate once to finish two twisting pitches simultaneously to form a folded wire; and thirdly, controlling the tension of the steel wire to be stable in the twisting process by the paying-off spool and the tension adjusting device.

Still preferably, the aforementioned S3 specifically includes the following steps: adding a group of corresponding first twisting devices; and (II) reducing the residual torsion generated during twisting of the strand by using a high-speed rotating over-twisting wheel, namely, continuously rotating the strand to approach or reach the yield strength of the steel wire, so that the steel wire is subjected to certain plastic deformation, and the residual stress generated during elastic deformation is eliminated.

More preferably, the rotating speed of the first over-twisting device is 1.3-2.2 times of the rotating speed of the auxiliary flywheel disc, and the rotating speed of the first over-twisting device is at most 7000 rpm.

Further preferably, the aforementioned S4 specifically includes the following steps: uniformly distributing the strands after stress relief on a wire distributing plate; (II) converging at a line concentration mouth; thirdly, selecting a wire collecting nozzle and a pressing die according to the specification of the finished cord; and (IV) the strands gathered together enter the main machine together.

Still more preferably, the aforementioned S5 specifically includes the following steps: the first step, enabling the gathered stranded yarns to sequentially pass through a main flywheel disc, a traction device, an over-twisting device and a straightener box take-up device; and (II) winding the steel wire on a finished product paying-off spool through a wire take-up device.

The invention has the advantages that: the equipment structure is simplified, the occupied area is reduced, the noise is reduced, and the production efficiency is improved; the stranded cord can be made with smaller lay length, so that higher breaking elongation can be obtained; the structure of each strand of monofilament with less number has the characteristics that under the same diameter, the cord thread has larger gaps, lower linear density and better glue permeation; this has a significant advantage in improving both the adhesion property and the impact resistance of the steel cord.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a prefabrication apparatus;

FIG. 3 is a schematic structural view of a first over-twisting device;

fig. 4 is a schematic diagram of the structure of the host.

The meaning of the reference symbols in the figures: 1. the device comprises a prefabricating device, 101, a pay-off I-shaped wheel, 102, a tension adjusting device, 103, an auxiliary flywheel disc, 2, a first over-twisting device, 201, a front over-twisting wheel, 202, a rear over-twisting wheel, 203 over-twisting components, 3, a wire collecting device, 301, a wire distributing disc, 302, a wire collecting nozzle, 303, a pressing die, 4, a main machine, 401, a main flywheel disc, 402, a traction device, 403, a second over-twisting device, 404, a straightener assembly, 405 and a wire collecting device.

Detailed Description

The invention is described in detail below with reference to the figures and the embodiments.

The utility model provides a production facility of steel cord, including a plurality of prefabrication device 1, prefabrication device 1 is including the pay off worker character wheel 101 of taking tension control, tension adjusting device 102 and a pair of vice flywheel dish 103, prefabrication device 1 one side is provided with the first device 2 of twisting with fingers of a plurality of, first device 2 of twisting with fingers includes preceding line wheel 201, back line wheel 202 and the subassembly 203 of twisting with fingers with two over fingers, prefabrication device 1 equals with the number of first device 2 of twisting with fingers, the number of prefabrication device 1 sets up to 2-10, become a plurality of pay off worker character wheels 101, the simplified equipment structure, the rotational speed of improvement flywheel dish, high in production speed, the noise is low during production, more preferably, the number of prefabrication device 1 sets up to 5-7, better control tension, guarantee that the tension of every steel wire is unanimous, the unwrapping state is unanimous.

The other side of the first over-twisting device 2 is provided with a wire collecting device 3, the wire collecting device 3 comprises a wire distributing disc 301 with a wire passing wheel, a wire collecting nozzle 302 and a pressing die 303, the wire collecting device comprises a pre-deformation device, pre-deformation is carried out on the strands, the strands form certain ripples, the breaking elongation of finished product cords can be changed by adjusting the deformation amount, the breaking elongation required by the finished product cords is obtained, the other side of the wire collecting device 3 is provided with a main machine 4, and the main machine 4 comprises a pair of main flywheel discs 401, a traction device 402, a second over-twisting device 403, a straightener assembly 404 and a wire collecting device 405 with a wire arranging function.

A steel cord production method of steel cord production equipment is characterized by comprising the following steps: s1, collecting a plurality of wires, and winding 2-3 wet-drawn steel wires with the same diameter on a spool simultaneously through a godet wheel; s2, prefabrication: a rotary multi-station prefabricating device is adopted to simultaneously complete the prefabrication of a plurality of strands of folded yarns; s3, strand stress relief: a plurality of groups of over-twisting devices are adopted to eliminate residual stress generated by prefabrication twisting; s4, adopting a distributing terminal plate, a pressing die and a wire collecting nozzle with adjustable relative distance to meet the production requirements of various cords with different specifications; s5, determining the speed ratio relation between the flywheel disc of the main machine and the prefabricated flywheel disc, and realizing the production of the lay length of each specification of the stranded rope cord.

Multiple filaments are collected simultaneously

The figure 1 shows that the prefabricating devices 11 of the groups 5-7 are provided with only one paying-off station, and the purpose is to simplify the structure of the equipment and improve the rotating speed of a flywheel disc, otherwise, the equipment is too large, the production speed is low, and the noise is difficult to control during production. When 2 to 3 spools are changed into one paying-off

spool

101, 2 to 3 wet drawing machines can simultaneously draw steel wires with the same diameter and wind the steel wires on one paying-off spool 101 through a godet wheel, so that the drawing speed and the take-up tension are consistent. Or 2 or 3 drawn steel wires with the same diameter can be wound on 1 pay-off I-shaped wheel 101 through a wet drawn steel wire rewinding device.

In order to ensure that the states of the plurality of steel wires during paying off are consistent, the take-up tension of wet drawing needs to be strictly controlled, the tension of the plurality of steel wires on the same paying-off I-shaped wheel 101 is consistent, and the wire arrangement is uniform.

Preparation of strands

Fig. 2 shows 1 group of strand prefabricating devices 1, the prefabricating devices 1 are provided with a pair of independent rotating flywheel discs 103, a steel wire on an unwinding I-shaped wheel 101 passes through a front auxiliary flywheel disc 103 and a rear auxiliary flywheel disc 103 in sequence to finish two twisting processes of AB and CD sections, the two twisting directions are consistent, namely the auxiliary flywheel discs 103 rotate once to finish two twisting pitches simultaneously, and the unwinding I-shaped wheel 101 with tension control and a tension adjusting device 102 ensure the tension stability of the twisting process; since the paying-off I-shaped wheel 101 has previously taken up 2-3 steel wires, the steel wires are simultaneously paid off, and 2 or 3 steel wires are naturally twisted together to form a strand after the production of the device.

Corresponding sets of preformed units 1 produce a corresponding number of preformed strands. These strands may be present in up to 10 groups, preferably 5-7 groups.

Preformed strand lay length determination

The twist direction of the stranded cord structure cord is S/S, and the twist distance of the finished cord rope is T ₁ The lay length of the strands in the finished product is T ₂ The preformed lay length of the strand being T ₀ Let us know T ₂ Is formed by twisting a strand into a T ₀ Then the lay length T of the finished curtain cord is used ₁ Formed after twisting; when a twisted yarn with S/S direction and T lay length is produced ₁ /T ₂ During cord thread, the lay length T of the finished steel wire ₁ By replacing the corresponding pitch gear, but the pitch T of the strands ₂ But pass through T ₀ And T ₁ And (5) twisting twice.

Assuming that 1000mm strands are twisted into 1000mm strands, no twist shrinkage occurs during the whole twisting process, and the number of strands twisted is

1000/T ₂ ＝1000/T ₀ +1000/T ₁ (1)

2T ₁ ＝V/N ₁ (2)

2T ₀ ＝V/N ₀ (3)

T ₁ /T ₂ ＝(N ₀ /N ₁ +1) (4)

N ₀ /N ₁ ＝T ₁ /T ₂ -1 (5)

Wherein V is the speed m/min of the traction wheel

N ₁ Is the rotating speed rpm of the flywheel disc of the main machine,

N ₀ the speed rpm of a flywheel disc for pre-twisting the strands.

When a strand cord is produced, the rotating speed ratio of the main machine 4 and the pre-twisted auxiliary flywheel disc 103 can be determined by the formula (5) through the known twisting distance of the rope and the strand, and after the rotating speed of the main machine main flywheel disc 401 is set, the rotating speed of the pre-twisted auxiliary flywheel disc 103 is easily calculated.

Strand stress relief

The steel wire is twisted to generate stress, the stress generated by a plurality of strands of folded yarns is superposed together greatly, meanwhile, the twisting direction of a finished product is consistent with that of the folded yarns, the stress generated by the two twisting processes cannot be counteracted, and the stress is superposed continuously, so that the quality of a subsequent product twisted continuously into a rope is difficult to control, and therefore, the residual stress generated during the production of the folded yarns must be eliminated before the folded yarns enter the finished product twisting process. After 1 group of plied yarns are twisted, 1 group of corresponding first over-twisting devices 2 are added, and the over-twisting wheels rotating at high speed reduce the residual torsion generated until the plied yarns are twisted, namely, the plied yarns are continuously rotated to approach or reach the yield strength of the steel wire, so that the steel wire generates certain plastic deformation, and the residual stress generated during elastic deformation is eliminated.

Rotational speed N of the over-twisting device ₂ Is the rotation speed N of the fly wheel disc 103 of the strand pre-twisting auxiliary ₀ 1.3-2.2 times of; the maximum speed does not exceed 7000 rpm.

Method of implementation

The method comprises the following steps of (1) collecting steel wires with the same diameter drawn by 2-3 wet drawing machines on a paying-off spool 101 according to the same drawing speed, ensuring that 2-3 steel wires which are collected simultaneously are uniformly arranged and have consistent collecting tension, and collecting the steel wires fully on the spool according to corresponding fixed length and then unloading the steel wires; then, according to the number of strands of the finished product cord, arranging a corresponding number of I-shaped wheels in each prefabricating device 1, and sequentially passing through a tension adjusting device 102, a pre-twisting auxiliary flywheel disc 103 and a over-twisting device 2 according to a corresponding winding mode; the strands are uniformly distributed on a distribution plate 301, then are converged at a wire collecting nozzle 302, the wire collecting nozzle 302 and a pressing die 303 are selected according to the specification of a finished product cord thread, and the strands converged together enter a main machine 4; the wire is wound on a finished spool to finish threading after passing through a left main flywheel disc 401, a right main flywheel disc 401, a traction device 402, an over-twisting device 403, a straightener assembly 404 and a wire take-up device 405 of a main machine in sequence; and setting the speed of the host machine 4 and the prefabricating device 1 according to the lay length ratio of the finished curtain thread rope and the folded yarn, and starting the machine after checking without errors. The distance between the wire distributing plate 301 and the wire collecting nozzle 302, the rotating speed of the pre-twisting component 203, the rotating speed of the second over-twisting device 403 of the main machine 4 and the pressing amount of the straightener assembly 404 can be respectively adjusted according to the twisting quality, the residual torsion and the like of the product. For the cord types with higher requirements on breaking elongation, a corresponding pre-deformation device can be additionally arranged at the distribution plate to meet the requirements of high-elongation cords.

Examples

Production of existing product 4X 2X 0.25HE

Respectively placing two heat-treated electroplated brass steel wires with the diameter of 1.48 on two wet drawing machines, then completing die penetration according to the wet drawing process of 1.48-0.25, enabling the steel wires drawn out of 1 of the wet drawing machines to pass through a wire passing wheel and then to be placed on a traction wheel of the other wet drawing machine, linking electric control parts of the two wet drawing machines, enabling the drawing speeds of the two wet drawing machines to be consistent, and collecting the two combined steel wires on 1 pay-off I-shaped wheel 101; 4 such paying-off spools 101 are respectively placed on a spool placement device in a prefabricating device 1, steel wires pass through a pre-twisting auxiliary flywheel disc 103, a pre-twisting assembly 203 and a wire distribution disc 301 in a threading mode shown in figure 1, then pass through 4 pre-deformers which are positioned on the wire distribution disc and are positioned at the upper part, the lower part, the left part and the right part, then are gathered together, are arranged according to the positions of all strands on the cross section of a finished cord by using a 4X 2X 0.25HE product special wire collecting nozzle 302 and a pressing die 303, then are wound on a traction wheel 402 through a main 4 main flywheel disc 401, then enter a second pre-twisting assembly 403 through an 8-shaped wheel and a second wire passing wheel 401, and finally are wound on a finished wire collecting spool through a wire arranging device.

The lay length of 4X 2X 0.25HE is 3.5/6.0, the twist direction S/S, the main machine speed is 3500rpm, the pre-twist speed is 2500rpm, the pre-twist speed is 5000-. Then starting up the machine for production, wherein the production speed can be 80-100% of the set speed. The corresponding technical parts and the over-twisting speed can be adjusted according to the quality of the product, and the requirement of the cord thread quality is met.

The 4X 2X 0.25HE cord test data are as follows

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by using equivalent alternatives or equivalent variations fall within the scope of the present invention.

Claims

1. A production method of a steel cord comprises a plurality of prefabricating devices, wherein each prefabricating device comprises a pay-off spool with tension control, a tension adjusting device and a pair of auxiliary flywheel discs, a plurality of first over-twisting devices are arranged on one side of each prefabricating device, the number of the prefabricating devices is equal to that of the first over-twisting devices, the number of the prefabricating devices is 5-7, each first over-twisting device comprises a front wire passing wheel, a rear wire passing wheel and a over-twisting assembly with two over-twisting wheels, a wire collecting device is arranged on the other side of each first over-twisting device, each wire collecting device comprises a wire distributing disc with a wire passing wheel, a wire collecting nozzle, a pressing die and a pre-deforming device, a flywheel is arranged on the other side of each wire collecting device, each main machine comprises a pair of main discs, a traction device, a second over-twisting device, a straightener assembly and a wire collecting device with a wire arranging function, and is characterized in that, the method comprises the following steps: s1, collecting a plurality of wires, and winding 2-3 wet-drawn steel wires with the same diameter on a paying-off spool simultaneously through a godet wheel; s2, prefabrication: a rotary multi-station prefabricating device is adopted to simultaneously complete the prefabrication of a plurality of strands of folded yarns; s3, strand stress relief: a plurality of groups of over-twisting devices are adopted to eliminate residual stress generated by prefabrication twisting; s4, adopting a distributing terminal plate, a pressing die and a wire collecting nozzle with adjustable relative distance to meet the production requirements of various cords with different specifications; s5, determining the speed ratio relation between the flywheel disc of the main machine and the prefabricated flywheel disc, and realizing the production of the lay length of each specification of the stranded rope cord.

2. A method for producing a steel cord as claimed in claim 1, characterized in that said S2 comprises in particular the steps of: placing a paying-off I-shaped wheel which is used for collecting 2-3 steel wires on a paying-off device with a tension control to ensure that the paying-off tension is stable; secondly, 2-3 steel wires on the pay-off I-shaped wheel sequentially pass through the two auxiliary flywheel discs to finish the two twisting of the AB and the CD, wherein the two twisting directions are consistent, namely the auxiliary flywheel discs rotate once to finish two twisting pitches simultaneously to form a folded wire; and thirdly, controlling the tension of the steel wire to be stable in the twisting process by the paying-off spool and the tension adjusting device.

3. A method for producing a steel cord as claimed in claim 1, characterized in that said S3 comprises in particular the steps of: adding a group of corresponding first twisting devices; and (II) reducing the residual torsion generated during twisting of the strand by using a high-speed rotating over-twisting wheel, namely, continuously rotating the strand to approach or reach the yield strength of the steel wire, so that the steel wire is subjected to certain plastic deformation, and the residual stress generated during elastic deformation is eliminated.

4. A method for producing a steel cord as claimed in claim 2, characterized in that the rotational speed of said first over-twisting means is 1.3-2.2 times the rotational speed of the freewheel disc, said rotational speed of said first over-twisting means being at most 7000 rpm.

5. A method for producing a steel cord as claimed in claim 1, characterized in that said S4 comprises in particular the steps of: uniformly distributing the strands after stress relief on a wire distributing plate; (II) converging at a line concentration mouth; thirdly, selecting a wire collecting nozzle and a pressing die according to the specification of the finished cord; and (IV) the strands gathered together enter the main machine together.

6. A method for producing a steel cord as claimed in claim 1, characterized in that said S5 comprises in particular the steps of: the first step, enabling the gathered stranded yarns to sequentially pass through a main flywheel disc, a traction device, an over-twisting device and a straightener box take-up device; and (II) winding the steel wire on a finished product paying-off spool through a wire take-up device.