JP2003245743A - Wire passing guide of stranding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wire passing guide of a stranding device which can reduce friction resistance between a carbide guide and wire or a stranded wire and also reduce fluctuation levels of resistance and tension. <P>SOLUTION: A base layer 3 containing at least one or more elements among Si, Cr, Ti, W is formed on the surface of a void part 2a of a cylindrical base material 2 which guides the wire or the stranded wire to be transferred. Then, a coating layer 4 obtained by coating diamond-like carbon is formed on the base layer 3, and thus the wire passing guide 1 is manufactured. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire guide for guiding a strand or a twisted wire in a predetermined direction in a steel cord twisting device.

[0002]

2. Description of the Related Art Conventionally, when a stranded wire is produced by using a plurality of wires or stranded wires, for example, as shown in FIG. The strands or stranded wires from the bobbins 11 are arranged in series inside the body, and the strands or stranded wires from the bobbins 11 are guided to the voices (strands) 14 by the wire guides 13, and the strands or stranded wires are twisted together. The cap bobbin 15 is fed to and wound on the winding bobbin 16. In the tubular type stranding machine 10 as described above, since the bobbin 11 is arranged in series inside the barrel of the tubular rotor 12, the total length of the stranding machine 10 tends to be long. Therefore, the more the strands or stranded wires fed out from the rear of the device, the more chance of contact with the machine body such as the guide,
As a result, the tension due to the contact frictional resistance is increased in the wire or the stranded wire. As a guide inside the tubular type stranding machine 10, generally, a cylindrical wire guide 13a made of a superhard material and the rotor 12 are used.
Notch type wire guide 13 used for the end guide
Although a fixed type wire guide such as b is used, when the above-mentioned carbide guides (wire guides 13a and 13b) are used, the frictional force when a wire or a stranded wire passes through In order to reduce this, conventionally, the surface of the through hole or guide groove, which is the contact surface with the above-mentioned strand or stranded wire of the cemented carbide guide, is smoothly polished, or oil with lubricity is used for the strand or stranded wire. Measures are taken such as applying it beforehand.

[0003]

However, when a cemented carbide guide is used, it is necessary to use a lubricating oil together in order to reduce the frictional resistance. At this time, if the amount of oil to be applied is increased, the tubular type is used. On the rotor 12 of the stranded wire machine 10, the above-mentioned oil is scattered by the action of centrifugal force caused by high-speed rotation, which contaminates the inside of the protective machine cover, and the oil collects dust, dust, etc. Contamination may occur in the tubular type stranding machine 10 and the stranded products. Further, when the amount of oil is small, the effect of reducing friction is small, and therefore the wire diameter is particularly small (up to φ0.25 m).
(M or less) Stranded wires such as high carbon steel have a problem that breakage occurs due to high tension and productivity and work efficiency decrease. It is also possible to use a roller guide of a bearing mechanism as the guide, but since the roller guide of the bearing mechanism has a large size as a component, not only does the device increase in size, but also a cemented carbide guide is used. Since it is expensive in comparison, it is not suitable as a guide for the tubular type stranding machine 10 that uses a large number of guides.

The present invention has been made in view of the conventional problems, and it is intended to reduce the frictional resistance between the carbide guide and the strands or stranded wires, and to reduce the fluctuation level of the resistance force / tension. An object of the present invention is to provide a wire guide for a twisted wire device.

[0005]

A wire guide of a twisted wire device according to claim 1 of the present invention is a wire made of cemented carbide having a through hole or a guide groove for guiding an element wire or a stranded wire. A guide having a coating layer of diamond-like carbon on at least the surface of the through hole or the guide groove. The wire guide of the twisted wire device according to claim 2, wherein an underlayer containing at least one element of Si, Cr, Ti, W is formed on the surface of the through hole or the guide groove, and the underlayer is formed. The above coating layer is formed on the above. The wire guide of the twisting wire device according to a third aspect is the wire guide of the twisting wire device according to the first or second aspect, in which the shape of the wire guide is a cylindrical shape. Further, the wire guide of the twisting device according to claim 4 is the wire guide of the twisting device according to claim 1 or 2, wherein the shape of the wire guide is
The column is a column provided with guide grooves extending in the length direction of the side surface to both ends of the column.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic view showing a cylindrical wire guide 1 according to the present embodiment, and 2 is a cylindrical base material made of a super hard material such as tungsten carbide (WC). The ends of the voids 2a of the base material 2 are rounded with a kerf so as to be slightly wider than the center so that the strands or stranded wires to be guided can easily pass therethrough. 3 is an underlayer formed on the wall surface of the void 2a of the substrate 2 and containing at least one element of Si, Cr, Ti, W. 4 is a diamond-like layer formed on the underlayer 3. It is a coating layer formed by coating carbon. The thickness of the coating layer 4 is 2
If the thickness is too thick, the coating layer 4 is likely to peel off during use, in which case the friction reducing function is impaired. The base layer 3 is provided to strengthen the adhesion between the base material 2 made of a superhard material and the coating layer 4, and usually has a thickness of about 0.2 μm. An intermediate layer containing both diamond-like carbon and a metal element such as Cr, Ti, W may be provided between the base layer 3 and the coating layer 4. In this case, the coating layer 4 is adhered. Becomes stronger, the thickness of the coating layer 4 can be increased,
The durability of the coating layer 4 can be further improved.

In this embodiment, the wire guide 1 having the above-described configuration is used in place of the cylindrical wire guide 13a used in the tubular type stranding machine 10 shown in FIG. Further, instead of the notch type wire guide 13b used as a guide at the end of the rotor 12, it is formed in the longitudinal direction of the side surface 5a of the cylindrical base material 5 made of a super hard material as shown in FIG. Was
On the wall surface of the guide groove 5b extending to both ends of the cylinder, Si,
A cut type wire guide 8 in which an underlayer 6 containing at least one element of Cr, Ti, W is formed, and a coating layer 7 formed by coating diamond-like carbon on the underlayer 6 is formed. To use. Here, the thickness of the base layer 6 and the coating layer 7 may be the same as or different from the thicknesses of the base layer 3 and the coating layer 4.

In the wire guides 1 and 8 of this embodiment, coating layers 4 and 7 made of diamond-like carbon, which is a material having a low friction resistance property, are provided at the portions that come into contact with the strands or strands to be conveyed. Therefore, it is possible to reduce the frictional resistance between the wire guides 1 and 8 and the strands or stranded wires, and to act on the strands due to the frictional resistance during passage of the wire guides 1 and 8. The tension to be applied can be reduced. Therefore, the disconnection is reduced and the frictional resistance is reduced, so that the fluctuation level of the resistance force / tension is reduced, so that the tension can be easily adjusted, and the productivity and the work efficiency can be improved. It should be noted that when the tension is reduced, it is possible to reduce the amount of conventionally used lubricating oil, and it is possible to suppress oil scattering inside the twisting machine cover. In addition, Chile
This has the advantage that secondary product contamination due to scattered oil that collects dust and the like can be suppressed.

As described above, according to the present embodiment, the void portion 2a of the cylindrical wire guide 1 for guiding the strands or strands to be twisted and the slit type wire guide 8 are provided. Underlayers 3 and 6 containing at least one element of Si, Cr, Ti and W are formed on the surface of the guide groove 5b,
Since the coating layers 4 and 7 formed by coating diamond-like carbon on the underlayers 3 and 6, the wire guides 1 and 8 and the wire or stranded wire when the wire guides 1 and 8 pass through are formed. It is possible to reduce the tension caused by the frictional resistance between the two. As a result, the disconnection is reduced and the fluctuation level of the resistance force / tension is also reduced, so that the tension can be easily adjusted and the productivity and the work efficiency can be improved. Moreover, since the amount of lubricating oil used can be reduced, it is possible to suppress oil scattering and reduce the frequency of maintenance such as cleaning of the inside of the complicated device.

<Example> On the inner wall of a cylindrical cemented carbide guide having an outer diameter of 4.5 mm, a center inner diameter of 2.3 mm, and a length of 5 mm,
Ti and Si are sputtered to a thickness of 0.2
~ 0.4 μm underlayer is formed, and C is formed on the underlayer.
By the ionized depositing ₆ H ₆ as a raw material, thickness 0.8
A cylindrical wire guide formed with a coating layer of diamond-like carbon of 1 μm, and a guide groove of a cemented carbide guide having a guide groove on a cylinder having an outer diameter of 12 mm and a length of 13 mm as an end guide of the rotor, Create a notch-type wire guide with the same underlying layer and coating layer as above, and attach it to a steel cord twisting machine where 10 bobbins can be attached, and twist the 9th bobbin from the twisting point. The tension applied to the strand at the portion that hits immediately after the point was measured. In addition, for comparison, the thickness is 0.8 to 1 directly on the solvent-cleaned cemented carbide substrate.
A wire guide having a coating layer of diamond-like carbon having a thickness of μm and a conventional wire guide having no coating treatment were prepared, and the same measurement was performed. In addition,
The stranding machine and its operating conditions were the same. In each case, the tension when the coated wire guide was used was reduced to about half that when the coating was not applied. From this, it was confirmed that the diamond-like carbon coating layer reduced the frictional resistance with the wire when passing through the wire guide. It should be noted that the diamond-like carbon coating film is easily peeled off when the underlayer is not provided, and it has been found that the underlayer is more advantageous in consideration of durability. In addition, as a result of examining the amount of lubricating oil to be applied to the wire beforehand, it was found that the tension level did not change even if the amount of adhesion was reduced to about half of the conventional amount. However, if the lubricating oil is completely removed, the diamond-like carbon coating layer will be rapidly worn, so it is preferable to use the lubricating oil together. As a method for forming a diamond-like carbon coating layer, in addition to the above-mentioned ionization vapor deposition, a high frequency plasma CVD method using CH ₄ -Ar as a raw material, an ion beam vapor deposition method, a vacuum arc method using graphite as a raw material, and sputtering. And a pulsed laser deposition method can be used.

[0011]

As described above, according to the present invention,
A coating layer of diamond-like carbon is formed on at least the surface of the through hole or guide groove of a wire guide made of cemented carbide having a through hole or guide groove for guiding a wire or a stranded wire. Therefore, it is possible to reduce the fluctuation level of the frictional resistance and the resistance force / tension between the wire guide and the strand when the wire guide passes, and it is possible to improve productivity and work efficiency. Moreover, Si, C is formed on the surface of the through hole or the guide groove.
By forming an underlayer containing at least one element of r, Ti, and W and forming the above-mentioned coating layer on the surface of this underlayer, the adhesion strength of the coating layer can be increased and the durability of the coating layer can be improved. It is possible to improve the sex. Also, since the amount of lubricating oil used to reduce tension has been reduced,
Oil scattering can be suppressed, and the frequency of maintenance such as cleaning of the inside of complicated equipment can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a cylindrical wire guide according to the present embodiment.

FIG. 2 is a schematic view showing a notch type wire passage guide according to the present embodiment.

FIG. 3 is a schematic view of a tubular type stranding machine.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Cylindrical wire guide, 2 Cylindrical base material, 2a Void, 3,6 Underlayer, 4,7 Coating layer, 5
Cylindrical base material, 5a cylindrical side surface, 5b guide groove, 8
Notch type wire guide, 10 tubular type twisting machine, 11 bobbin for unwinding strands or strands,
12 cylindrical rotor, 13 wire guide, 13a cylindrical wire guide, 13b notch wire guide, 14 voices (twisting points), 15 capstan, 16 winding bobbin.

Claims (4)

[Claims] 1. A wire guide made of cemented carbide having a through hole or a guide groove for guiding an element wire or a stranded wire, wherein at least the surface of the through hole or the guide groove has a diamond-like carbon coating layer. A wire guide for a twisted wire device. 2. The surface of the through hole or the guide groove is provided with S
2. The twisted wire device according to claim 1, wherein an underlayer containing at least one element of i, Cr, Ti, and W is formed, and the coating layer is formed on the underlayer. Line guide. 3. The wire guide of the twisting device according to claim 1, wherein the wire guide has a cylindrical shape. 4. A guide groove extending in the length direction of the side surface of the cylinder to the both ends of the cylinder is provided.
Alternatively, the wire guide of the twisted wire device according to claim 2.