JP4783348B2 - Flat-formed stranded wire and method for producing flat-formed stranded wire - Google Patents

Description

  The present invention relates to a rectangular formed stranded wire and a method for producing a rectangular formed stranded wire. In particular, the present invention relates to a flat formed stranded wire used for a coil such as an electromagnetic circuit and a method for producing a flat formed stranded wire.

  As an electric conductor used for a coil of a conventional electromagnetic circuit or the like, for example, an electric conductor formed by twisting a plurality of conductors whose surfaces are covered with a material having a predetermined coefficient of static friction to form a rectangular cross section is known. (For example, refer to Patent Document 1). This electrical conductor includes a substantially circular conductor such as a copper wire, a coating and baking layer baked on the surface of the conductor, and a surface layer made of a material having a static friction coefficient of 0.30 or more provided on the surface of the coating and baking layer. The electrical conductor is provided with a plurality of insulated wire strands having a circular cross section, and is formed into a rectangular cross section after twisting the plurality of insulated wire strands.

  Since the electrical conductor described in Patent Literature 1 includes a surface layer having a predetermined static friction coefficient on the surface of the insulated wire, the slipping property between the plurality of insulated wires is reduced. Therefore, the electrical conductor described in Patent Document 1 crosses over a plurality of flat insulated wires when forming a flat angle after twisting a plurality of insulated wires. It can suppress and form that the clearance gap between several insulated wire strands generate | occur | produces.

Moreover, as another conventional method for producing a rectangular formed stranded wire, for example, there is a method in which an assembly die is disposed immediately after a mandrel for guiding each wire (see, for example, Patent Document 2). In this method of manufacturing a rectangular formed stranded wire, each wire supplied from a plurality of revolving bobbins is guided by a mandrel, and then gathered together by a gathering die arranged immediately thereafter, and then twisted together. The wire is formed into a flat angle with a forming roll to produce a flat formed stranded wire.
JP-A-8-36922 Japanese Patent No. 2596188

  However, in the electrical conductor described in Patent Document 1, it is necessary to form a surface layer on each of the plurality of insulated wire elements. That is, in the manufacture of the electrical conductor described in Patent Document 1, it is necessary to add a step of preparing a material for forming the surface layer and a step of forming the surface layer on the conductor surface. There is a limit to the reduction of the constituent materials and the manufacturing process of the electrical conductor, and there is also a limit to shortening the manufacturing time.

  Moreover, in the manufacturing method of the flat forming twisted wire described in Patent Document 2, according to the inventor's estimation, the manufacturing speed could not be improved because the collecting die was provided immediately after the mandrel.

Accordingly, an object of the present invention, without increasing material and manufacturing process constituting a flat-molded stranded wire, flat-molded stranded wire which can be produced at a high speed by suppressing the occurrence of a gap between the crossover and the wires of the stranded wire Another object of the present invention is to provide a method for manufacturing a flat-shaped stranded wire.

The present invention, in order to achieve the above object, a first layer and, the number in the same diameter as the first wire rod is the first line member molded is Awa twisted first wire rod in the number of Jo Tokoro in rectangular shape The second wire rod is formed by including a second layer in which four more second wire rods are twisted on the outside of the first layer and formed into a flat rectangular shape, and the second wire rod constituting the second layer is processed. as the processing rate of the side periphery is larger than the processing rate of the opposite side of the outer periphery of the working side periphery flat outer peripheral portions exposed to the outside it is compressed processed deformed pressed against the first layer A shaped strand is provided.

Further, in the above-mentioned flat-shaped stranded wire , the first layer wire and the second layer wire are twisted in the same direction, and the twist angle of the first layer wire and the second layer wire are twisted. The difference from the tilt angle may be -3.0 degrees or more and +3.0 degrees or less.

  Further, the flat-shaped stranded wire may be formed by alternately twisting the wire material of the first layer and the wire material of the second layer.

In addition, the rectangular formed stranded wire may be formed of a two-layer structure including a first layer and a second layer surrounding the first layer. Further, the flat shaped stranded wire, the outer circumference of the wire of the first layer wire outer periphery and a second layer of the at insulation coating may be coated, respectively.

Further, in order to achieve the above object, the present invention includes a step of joining a predetermined number of fed first wires to form a preliminary stranded wire at the junction, and an assembly having a predetermined distance from the junction A step of assembling the pre-twisted wires in a point and compression-molding the pre-twisted wires into a rectangular shape to form a first layer ; and an outer diameter equal to that of the first wire and the number of the first wires More than four second wires are drawn out, and the second wires are joined to the first layer at the outer periphery of the first layer to form a pre-twisted wire, and the first layer and the second At the assembly point having a predetermined distance from the junction with the wire , the first layer and the pre-twisted wire by the second wire are assembled to compress the second wire onto the first layer, and Made in flat-molded stranded wire and forming a second layer by forming a second wire material into rectangular shape A method is provided.

According to the method for producing a flat-formed stranded wire of the present invention, without increasing the materials and manufacturing steps constituting the flat-formed stranded wire, the generation of the crossover of the stranded wire and the gap between the wires can be suppressed at a high speed. It can produce a flat-molded stranded wire, and can provide a flat-molded stranded wire which suppresses gaps between crossover and wires of the stranded wire.

[First Embodiment]
FIG. 1 shows a schematic view of a cross section of a flat-formed stranded wire according to an embodiment of the present invention.

(Structure of flat rectangular stranded wire 10)
The flat-molded stranded wire 10 according to the embodiment of the present invention includes a plurality of first wire rods 100 as a first layer that are twisted together to form a flat cross-section, and a plurality of first wire rods 100 from the outside of the plurality of first wire rods 100. And a plurality of second wires 110 as second layers that are twisted together and formed into a flat cross section while surrounding the first wire 100 and adjacent to the plurality of first wires 100. That is, the flat-molded stranded wire 10 according to the present embodiment is formed to have a two-layer structure of an inner layer that is a first layer and an outer layer that is a second layer.

  A plurality of wire rod groups in each concentric circle formed when the wire rods are concentrically arranged and twisted in such a manner that they are sequentially stacked are defined as “layers”. Moreover, FIG. 1 is a schematic diagram of a cross section of the flat-shaped stranded wire 10 according to the present embodiment, and the cross-sectional shapes of the plurality of first wire rods 100 and the plurality of second wire rods 110 are not necessarily as illustrated. .

  Each of the plurality of first wire rods 100 and the plurality of second wire rods 110 has a linear shape and is mainly formed from a conductive material having a substantially circular cross section. The conductive material is a metal material such as copper or aluminum. As an example, the plurality of first wire rods 100 and the plurality of second wire rods 110 are each formed from copper having a diameter of 1.8 mm. In addition, the first wire 100 and the second wire 110 are each baked by applying an insulating paint containing a polyester resin, a polyurethane resin, or the like as an insulating material having a good sliding property having a static friction coefficient of a predetermined value or less to the surface of the metal material. It can also be formed. Thereby, the outer periphery of the 1st wire rod 100 and the outer periphery of the 2nd wire rod 110 are each coat | covered with an insulating material.

  Each cross section of the plurality of first wire rods 100 and the plurality of second wire rods 110 after the flat-shaped stranded wire 10 is formed has a substantially polygonal shape.

  The square-shaped stranded wire 10 according to the present embodiment has a plurality of second wires as outer layers provided adjacent to the outside of the inner layer, based on the number of first wires 100 as the first predetermined number as the inner layer. 110 is formed by increasing the number as the second predetermined number. As an example, the square-shaped stranded wire 10 is formed by increasing the total number of the second wires 110 by four more than the total number of the first wires 100. The flat rectangular formed stranded wire 10 is formed of, for example, 16 first wire rods 100 and 20 second wire rods 110.

  In addition, the flat formed wire 10 is formed by twisting the plurality of first wires 100 and the plurality of second wires 110 in the same direction. In this case, the difference between the twist inclination angle of the plurality of first wire rods 100 and the twist inclination angle of the plurality of second wire rods 110 is set to be −3.0 degrees or more and +3.0 degrees or less, and the flat rectangular forming twist Line 10 is formed. A more preferable value of the difference in the tilt angle is −1.0 degree or more and +1.0 degree or less.

  In addition, the cross-sectional shape of the flat formed twisted wire 10 formed from the plurality of first wire rods 100 and the plurality of second wire rods 110 is a substantially rectangular shape. As an example, the vertical dimension is about 7 mm and the horizontal dimension is about 18 mm. It is substantially rectangular.

  In addition, you may form the square forming twisted wire 10 by making the some 1st wire 100 and the some 2nd wire 110 into alternate twist. Moreover, the 1st wire 100 and the 2nd wire 110 can each be formed from the wire shape | molded previously in the flat angle.

(Manufacturing method of the flat wire 10)
FIG. 2 shows the outline of the manufacturing process of the flat wire forming twisted wire which concerns on embodiment of this invention.

  First, each of the first wire rods 100 wound around each of the plurality of first bobbins 200 attached to the cage of the twisting machine 20 is drawn out in the direction of the first mandrel 210 and guided. And in the front-end | tip part as a confluence | merging point of the 1st mandrel 210, the some 1st wire 100 joins and a preliminary | backup twisted wire is formed. Subsequently, in the first collecting die 220 as a collecting point having a predetermined distance from the tip portion of the first mandrel 210, one stranded wire is formed from the preliminary stranded wire formed in the first mandrel 210.

  In this case, a predetermined interval 210 a is provided between the first mandrel 210 and the first collecting die 220 as a predetermined distance that is not normally provided. That is, a predetermined distance from the front end portion of the first mandrel 210 where the plurality of first wire rods 100 join to the entrance portion of the first assembly die 220 where the plurality of first wire rods 100 gather together is predetermined. Spacing 210a is provided.

  The predetermined interval 210a is determined in a range in which each of the plurality of first wire rods 100 guided from the first mandrel 210 to the first assembly die 220 does not swing and intersect. As an example, the distance 210a between the first mandrel 210 and the first collecting die 220 is about 10 cm. The plurality of first wire rods 100 as the first layers twisted together are supplied from the first collective die 220 to the first rolling roll 230 as a forming point having a predetermined distance.

  Subsequently, the plurality of first wires 100 twisted together are compression-molded into a flat-shaped stranded wire 5 having a flat cross-sectional shape in the first rolling roll 230. The 1st rolling roll 230 has four rolls as an example. And four rolls of the 1st rolling roll 230 are mutually orthogonally cross | intersected so that it may have a rectangular hole in the center part. The first rolling roll 230 rolls the plurality of first wire rods 100 that have passed through the first collective die 220 into a rectangular cross section in the hole. Then, the first rolling roll 230 supplies the formed rectangular formed stranded wire 5 to the second assembly die 222.

  Next, each of the second wire rods 110 wound around each of the plurality of second bobbins 202 attached to the cage of the twisting machine 20 is drawn in the direction of the second mandrel 212 and guided. And in the front-end | tip part as a confluence | merging point of the 2nd mandrel 212, the some 2nd wire 110 joins on the outer periphery of the flat forming wire 5, and a preliminary | backup twisted wire is formed. Subsequently, in the second assembly die 222 as an assembly point having a predetermined distance from the tip portion of the second mandrel 212, a single twisted wire from the pre-twisted wire formed in the second mandrel and the flat formed twisted wire 5 Is formed.

  In this case, similarly to the interval 210 a, a predetermined interval 212 a as a predetermined distance is provided between the second mandrel 212 and the second collecting die 222. That is, from the tip portion of the second mandrel 212 as a position where the plurality of second wire rods 110 merge with the flat wire forming stranded wire 5, as a position where the plurality of second wire rods 110 gather together with the flat wire forming twisted wire 5. A predetermined interval 212 a is provided up to the entrance of the second collective die 222.

  Similarly to the interval 210a, the predetermined interval 212a is determined within a range in which each of the plurality of second wire rods 110 guided from the second mandrel 212 to the second assembly die 222 does not swing and intersect. As an example, the distance 212a between the second mandrel 212 and the second collecting die 222 is about 10 cm. Then, the plurality of second wires 110 twisted in a flat shape are supplied from the second assembly die 222 to the second rolling roll 232 as a forming point having a predetermined distance.

  Subsequently, the flat formed stranded wire 5 in which the second wire 110 is twisted together is compression-molded into a flat formed stranded wire 10 having a rectangular cross section in the second rolling roll 232. The second rolling roll 232 has the same configuration as the first rolling roll 230. Finally, the flat rectangular stranded wire 10 is wound around the winding drum 240. As a result, the flat formed stranded wire 10 according to the present embodiment is formed.

  Here, in the present embodiment, an interval 210a and an interval 212a that are not normally provided are provided between the first mandrel 210 and the first collecting die 220 and between the second mandrel 212 and the second collecting die 222, respectively. Provide. Accordingly, the present inventor has found that the rectangular formed stranded wire 10 can be manufactured at a speed about three times faster than when the interval 210a and the interval 212a are not provided.

  And when each of a plurality of 1st wire rods 100 and a plurality of 2nd wire rods 110 are twisted together, maintaining a manufacturing speed about 3 times compared with the case where interval 210a and interval 212a are not provided, In order to suppress the crossover and the gap between the first wire rod 100 and the plurality of second wire rods 110 and form the flat formed wire 10 according to the present embodiment, a plurality of the first wire rods 100 are more than the total number of the first wire rods 100. The inventors have also obtained the knowledge that it is necessary to increase the total number of two wires 110 by four as a result of intensive studies. In addition, crossover means the state where the space | interval of adjacent wire materials narrows and it mutually overlaps.

  FIG. 3 shows a partial cross-sectional view of the second wire rod according to the first embodiment of the present invention.

  Each of the plurality of second wire members 110 is formed by being twisted around the outer periphery of the plurality of first wire members 100 as inner layers formed as the flat-shaped stranded wires 5. The outer periphery of the second wire 110 that is not in contact with the first wire 100 is processed by the second rolling roll 232. As shown in FIG. 3, an outer periphery 110 a that is a part of the outer periphery of the second wire 110 is a surface compression-molded by the second rolling roll 232 and has a shape that has a large curvature radius and approximates a straight line. Since the second wire rod 110 before processing has a circular cross-sectional shape, the outer periphery 110a corresponds to a portion where the processing rate by the second rolling roll 232 is large.

  On the other hand, the outer periphery 110b and the outer periphery 110c, which are part of the outer periphery of the second wire 110 on the first wire 100 side, do not directly contact the second rolling roll 232, but contact the outer periphery of the first wire 100, This is a portion that is pressed against the outer periphery of the first wire rod 100 by the pressure from the second rolling roll 232 and processed. Accordingly, the radii of curvature of the outer periphery 110b and the outer periphery 110c of the second wire 110 are small and have shapes that approximate a part of a circle. Since the second wire 110 before processing has a circular cross-sectional shape, the outer periphery 110b and the outer periphery 110c correspond to portions where the processing rate by the second rolling roll 232 is small. In addition, the said curvature radius is calculated | required on the basis of the both ends of each process surface of the outer periphery 110a, the outer periphery 110b, and the outer periphery 110c.

  That is, the processing rate of the outer periphery 110a exposed to the outside among the outer periphery of the plurality of second wire rods 110 is larger than the processing rate of the outer periphery 110b or the outer periphery 110c not exposed to the outside. As described above, by making the processing rate of the outer periphery exposed to the outside of the plurality of second wires 110 larger than the processing rate of the outer periphery not exposed to the outside, the cross between the wires of the plurality of second wires 110 is made. Over and gaps between the wires are reduced. In addition, since it is the same as that of the case of the 2nd wire 110 also about the 1st wire 100, detailed description is abbreviate | omitted. Further, the processing rate according to the first embodiment of the present invention refers to a percentage (%) obtained by dividing the difference between the radius of curvature after processing and the radius of the wire before processing by the radius of the wire before processing. .

(Effects of the first embodiment)
In the first embodiment of the present invention, a predetermined interval is provided between the first mandrel 210 and the first collecting die 220 and between the second mandrel 212 and the second collecting die 222. The flat-shaped stranded wire 10 can be manufactured at a speed about three times that in the case where the interval is not provided.

  Further, in the first embodiment of the present invention, by adjusting the difference between the number of the first wire rods 100 as the inner layer and the number of the second wire rods 110 as the outer layer, occurrence of crossover, In addition, it is possible to form the flat rectangular stranded wire 10 in which the generation of gaps between the plurality of first wire rods 100 and between the plurality of second wire rods 110 is suppressed. Accordingly, since it is not necessary to cover each of the plurality of first wire rods 100 and the plurality of second wire rods 110 with a new material, the rectangular forming twist is maintained while maintaining the high production rate without increasing the production process. Line 10 can be formed.

  In the present embodiment, the difference between the number of the first wire rods 100 as the inner layer and the number of the second wire rods 110 as the outer layer is adjusted, and the first mandrel 210 and the first assembly die 220 are adjusted. By providing a predetermined interval between the second mandrel 212 and the second assembly die 222, it is possible to form the flat rectangular twisted wire 10 that prevents the crossover of a plurality of wires and the generation of gaps. Accordingly, the flat-shaped stranded wire 10 can be manufactured at a high speed while the insulating paint having good slipperiness is provided on the outer surfaces of the plurality of first wires 100 and the plurality of second wires 110.

(Example)
Table 1 shows the number of occurrences of crossover and the value of the gap between the flat-formed stranded wire according to the example of the present invention and the flat-formed stranded wire according to the comparative example.

  In the examples, the flat-shaped stranded wire 10 formed from the first wire 100 as an inner layer made of a round wire of aluminum and the second wire 110 as an outer layer was used. Moreover, the number of the first wire rods 100 is 16, and the number of the second wire rods 110 is the flat-shaped stranded wire 10 that is 20. In addition, as for the cross section of the flat forming twisted wire 10 which concerns on a present Example, the vertical dimension was about 7 mm and the horizontal dimension was about 18 mm. Moreover, the diameter of the 1st wire 100 and the 2nd wire was 1.8 mm, respectively.

  In addition, as described above, the flat formed stranded wire according to the present example and the comparative example includes the interval 210a between the first mandrel 210 and the first assembly die 220, and the second mandrel 212 and the second assembly die 222. The distance 212a was about 10 cm.

  Sample No. The number of outer layers of the flat-shaped stranded wire according to Example 1 was four more than the number of inner layers (16), and the twist direction was the same direction twist of each layer. The difference between the twist angle of the inner layer and the tilt angle of the outer layer was +0.5 degrees.

  Sample No. In the flat-shaped stranded wire according to Example 2, the number of outer layers was four more than the number of inner layers (16), and the twist direction was alternately twisted on each layer.

  Sample No. In the flat-shaped stranded wire according to Example 3, the number of outer layers was four more than the number of inner layers (16), and the twist direction was the same direction twist for each layer. The difference between the twist angle of the inner layer and the tilt angle of the outer layer was +1.1 degrees.

  Sample No. The number of the outer layer of the flat-shaped stranded wire according to the comparative example 4 is four more than the number of the inner layer (16), and the twist direction is the same direction twist for each layer. The difference between the twist angle of the inner layer and the twist angle of the outer layer was +3.1 degrees.

  Sample No. The number of the outer layer of the flat-shaped stranded wire according to the comparative example 5 is six more than the number of the inner layer (16), and the twist direction is the same direction twist in each layer. The difference between the twist angle of the inner layer and the tilt angle of the outer layer was +0.5 degrees.

  Sample No. The number of the outer layer of the flat rectangular stranded wire according to the comparative example 6 is six more than the number of the inner layers (16), and the twisting direction of each layer is the same direction. The difference between the twist angle of the inner layer and the tilt angle of the outer layer was +1.1 degrees.

  Sample No. The number of outer layers in the flat-shaped stranded wire according to Comparative Example 7 was six more than the number of inner layers (16), and the twist direction was the same direction for all layers. The difference between the twist angle of the inner layer and the twist angle of the outer layer was +3.1 degrees.

  Sample No. The number of the outer layer of the flat rectangular twisted wire according to the comparative example 8 was six more than the number of the inner layers (16), and the twist direction was alternately twisted for each layer.

  Referring to Table 1, sample no. 1 and sample no. No. 2 flat-shaped stranded wire did not cause crossover at the time of twisting, and no gap was generated between the outer layer wires. Furthermore, since the interval 210a and the interval 212a are provided, the production rate of the flat formed stranded wire can be three times the production rate in the case of producing the flat formed stranded wire without providing the interval 210a and the interval 212a. . Sample No. No. 3 flat wire formed stranded wire had a maximum gap of 0.7 mm between the outer layer wires, but no crossover occurred. Here, Sample No. The gap formed between the wires of the outer layer of the flat rectangular stranded wire No. 3 is a gap that does not cause a problem in practice. Therefore, sample no. 3 flat-shaped stranded wires have been shown to substantially withstand practical use.

  On the other hand, sample no. The square-shaped stranded wire No. 4 was a rejected product, although a crossover did not occur, but a maximum gap of 1.8 mm was generated between the wires of the outer layer. In addition, sample No. In the flat-shaped stranded wire No. 5, there was no gap between the outer layer wires, but a crossover occurred once during the production of the flat-shaped stranded wire.

  Sample No. according to the comparative example. In the flat-shaped stranded wire No. 6, a gap of 0.9 mm at the maximum was generated between the wires of the outer layer, and a crossover occurred once during the production of the flat-shaped stranded wire. In addition, Sample No. No. 7 flat-shaped stranded wire had a maximum gap of 1.9 mm between the outer layer wires, and crossover occurred twice during the production of the flat-shaped stranded wire. Furthermore, the sample No. according to the comparative example. In the flat-shaped stranded wire No. 8, there was no gap between the outer-layer wires, but a crossover occurred once during the production of the flat-shaped stranded wire.

  From the above results, the number of the plurality of second wire rods 110 as the outer layer is increased by four from the number of the plurality of first wire rods 100 as the inner layer, and the inner layer and the outer layer are separated by providing the interval 210a and the interval 212a. When forming by twisting in the same direction, the difference between the inclination angle of the inner layer twist and the inclination angle of the outer layer twist is set to -3.0 degrees or more and +3.0 degrees or less, thereby crossing over a plurality of wires. It has been shown that the occurrence of gaps between a plurality of wires can be reduced.

  Similarly, when the number of the plurality of second wires 110 as the outer layer is increased by four than the number of the plurality of first wires 100 as the inner layer, and the inner layer and the outer layer are formed by alternating twisting, It was shown that the crossover of the wire rods and the formation of gaps between the plurality of wire rods can be prevented. Thus, it was shown that the present embodiment can provide a multi-layered rectangular formed stranded wire that does not cause crossover and gaps and that can be manufactured at high speed even if it is long.

  In addition, by comparing the comparative example and the example, it is possible to reduce the crossover at the time of twisting of the wire and at the time of flat forming without increasing the material for forming the flat formed twisted wire and the manufacturing process of the flat formed wire. It can be seen that a flat-molded stranded wire can be provided that does not generate or cause gaps. Further, it can be seen that it is possible to provide the production of a long flat rectangular stranded wire in continuous operation and the production of a flat rectangular stranded wire at a high speed.

  In the present embodiment, the reason why the number of outer-layer wires is increased by four from the number of inner-layer wires is as follows. First, when the difference between the number of wires in the outer layer and the number of wires in the inner layer is 3 or less, the electromagnetic characteristics of the coil constituted by using a rectangular formed stranded wire having a large gap between the outer layer wires and a large gap This is because of a decrease. Further, when the difference between the number of outer layer wires and the number of inner layer wires is 6 to 5 or more, crossover of wires is likely to occur.

  Furthermore, the reason for setting the difference between the inclination angle of the inner layer twist and the inclination angle of the outer layer twist to -3.0 degrees or more and +3.0 degrees or less is that if the angle difference of the inclination angle of the twist is out of the range, This is because the gap between the outer-layer wires cannot be reduced.

[Second Embodiment]
FIG. 4: shows the schematic diagram of the cross section of the flat forming wire based on the 2nd Embodiment of this invention.

  The flat formed stranded wire 11 according to the second embodiment is different from the flat formed stranded wire 10 according to the first embodiment in that it has an outer layer formed of a plurality of third wires 120 on the outermost part. Except for the differences, the detailed description will be omitted except for the differences.

  The flat formed wire 11 includes a plurality of first wire rods 100 as first inner layers, a plurality of second wire rods 110 as second inner layers provided adjacent to the first inner layer, and a second inner layer. And a plurality of third wires 120 as outer layers provided adjacent to each other. In this modification, the number of the plurality of third wires 120 is four more than the number of the plurality of second wires 110, and the number of the plurality of second wires 110 is four than the number of the plurality of first wires 100. Many books.

  Similarly to the first embodiment, in the case of forming each of the first inner layer, the second inner layer, and the outer layer with respect to the rectangular formed stranded wire 11 according to the second embodiment, A predetermined interval is provided between the collecting dies. As an example, the interval is about 10 cm. As a result, the flat-shaped stranded wire 11 can be manufactured at a manufacturing speed faster than the manufacturing speed when the interval is not provided. Since other manufacturing steps are substantially the same as those in the first embodiment, detailed description thereof is omitted.

(Modification)
FIG. 5: shows the schematic of the manufacturing process of the flat square forming twisted wire which concerns on a modification.

  Since the manufacturing process of the flat formed stranded wire according to the modification has substantially the same configuration as the manufacturing process of the flat formed stranded wire 10 according to the first embodiment except that there are no intervals 210a and 212a. A detailed description is omitted except for the differences.

  The stranded wire machine 20a used in the manufacturing process of the flat-formed stranded wire according to the modified example does not include the interval 210a between the first mandrel 210 and the first assembly die 220. Similarly, the space 212 a is not provided between the second mandrel 212 and the second assembly die 222.

  According to the twisting machine 20a having such a configuration, the difference between the number of inner-layer wires and the number of outer-layer wires in the flat-shaped stranded wire 10 or the flat-shaped stranded wire 11 according to the embodiment of the present invention is different from four. Even if the number is, for example, 5 or 6, etc., a cross-over does not occur, and a flat-shaped stranded wire with a small gap can be manufactured. Thereby, when a high production rate is not required, the number of inner-layer wires and the number of outer-layer wires can be appropriately changed to produce a rectangular formed stranded wire.

  As mentioned above, although embodiment and the modification of this invention were demonstrated, embodiment and modification which were described above do not limit the invention which concerns on a claim. In addition, it should be noted that not all combinations of features described in the embodiments and the modifications are necessarily essential to the means for solving the problems of the invention.

It is a schematic diagram of the cross section of the flat wire forming twisted wire which concerns on 1st Embodiment. It is the schematic of the manufacturing process of the flat angle | molded twisted wire which concerns on 1st Embodiment. It is a fragmentary sectional view of the 2nd wire concerning a 1st embodiment. It is a schematic diagram of the cross section of the flat wire forming twisted wire which concerns on 2nd Embodiment. It is the schematic of the manufacturing process of the flat forming wire based on a modification.

Explanation of symbols

5, 5a, 10, 10a, 11 Flat-shaped formed twisted wire 20, 20a Twisted wire machine 100 First wire 100a, 100b, 110a, 110b Outer periphery 110 Second wire 120 Third wire 200 First bobbin 202 Second bobbin 210 First Mandrel 210a, 212a Interval 212 Second mandrel 220 First collective die 222 Second collective die 230 First rolling roll 232 Second rolling roll 240 Winding drum

Claims (7)

A first layer formed into the rectangular shape is Awa twisted first wire rod in the number of Jo Tokoro,
A second wire having the same diameter as the first wire and four more wires than the first wire is twisted on the outside of the first layer and formed into a rectangular shape ;
In the second wire constituting the second layer, the outer peripheral portion exposed to the outside is compressed so that the processing rate of the processing side outer periphery is larger than the processing rate of the outer periphery on the opposite side of the processing side outer periphery. A flat-shaped stranded wire that is pressed against the first layer and deformed . The wire material of the first layer and the wire material of the second layer are twisted in the same direction, and the inclination angle of the twist of the wire material of the first layer and the inclination angle of the twist of the wire material of the second layer Difference is more than -3.0 degrees +
The flat-molded stranded wire according to claim 1, which is 3.0 degrees or less. 2. The flat-molded stranded wire according to claim 1, wherein the wire material of the first layer and the wire material of the second layer are twisted by alternating twist. The flat-molded stranded wire according to any one of claims 1 to 3 , which is formed of a two-layer structure including the first layer and the second layer surrounding the first layer. The first is the outer periphery of the wire material constituting the So及 beauty the second layer, flat-molded stranded wire according to any one of Tei Ru claim 1 coated respectively with insulation coating 4. A step of forming a pre-twisted wire by joining a predetermined number of fed first wires at the joining point;
Forming the first layer by compressing the preliminary stranded wire into a rectangular shape by assembling the preliminary stranded wire at an assembly point having a predetermined distance from the joining point;
A pre-twist is obtained by feeding out a second wire having the same outer diameter as the first wire and having four more wires than the first wire and joining the second wire with the first layer on the outer periphery of the first layer. Forming a line ;
The first wire and the pre-twisted wire formed by the second wire are assembled at a gathering point having a predetermined distance from a joining point between the first layer and the second wire, and the second wire is made into the first wire. And a step of forming the second layer by forming the second wire rod into a flat shape by compressing it onto the first layer . In the step of forming the first layer and the step of forming the second layer, the pre-twisted wire is formed into a rectangular shape with rolling rolls arranged so that four rolls have a rectangular hole in the center. The method for producing a flat-molded stranded wire according to claim 6, which is compression-molded.

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