JPH0679747B2 - Stranded wire manufacturing method and twisted wire drawing apparatus - Google Patents

Description

Detailed Description of the Invention [Industrial applications]

The present invention relates to an apparatus for drawing a twisted wire formed by twisting a plurality of strands, and more particularly to a method for manufacturing a twisted wire that does not cause unevenness in the twisted wire, and a twisted wire drawing apparatus.

[Prior art]

Generally, a twisted wire is obtained by twisting a plurality of strands to obtain a twisted wire having a desired wire diameter. This is sufficient to obtain a stranded wire of one type of wire diameter, but to manufacture stranded wires with different wire diameters, a stranded wire with a desired wire diameter is drawn by drawing the stranded wire once manufactured. Is being done. The reason is based on the following principle. That is, now, the twist pitch P of the bus bar (twisted wire) before entering the continuous wire drawing machine is Po, the cross-sectional area S is So, and the wire speed V is
Is Vo, the twist pitch P of the twisted wire drawn by the continuous wire drawing machine is Pd, the cross-sectional area S is Sd, the wire speed V is Vd, and the twist pitch of the twisted wire after twisting is P is Pt, cross-sectional area S is St,
The linear velocity V is Vt, and the number of twists given by the twisting machine per hour is Rt. Also, assuming that no surface reduction processing is performed on the twisting machine, the cross-sectional area Sd of the twisted wire after drawing and the wire speed Vd
And the cross-sectional area St of the twisted wire after twisting and the linear velocity Vt, the relationship of Sd = St ...... (1) Vd = Vt ...... (2) is established. Also, since the volume of twisted wire due to strain does not change, the twisted wire pitch Pd after wire drawing is related to the twisted wire pitch Po before entering the continuous wire drawing machine. And the volume of the stranded wire is Becomes Now, considering the twist density per length before and after twisting by the twisting machine, Becomes Therefore, the number of twists per time Rt is
From equations (4) and (6) Becomes Therefore, the wire speed Vt of the twisted wire after twisting is (7)
From the formula Becomes On the other hand, in the case of manufacturing the same stranded wire by twisting a normal single wire, the stranded wire pitch P is Pt, and when the same stranded wire machine is used, the number of twists per hour R given by the stranded wire machine is R. Is also the same as Rt. Therefore, if the linear velocity V when manufacturing a stranded wire from this single wire is Vt ₁ , the linear velocity Vt ₁ is Vt ₁ = Pt × Rt (9). Now, taking the ratio of equation (8) and equation (9), Becomes Therefore, the wire speed Vt in the case of manufacturing a twisted wire having a desired wire diameter from a twisted wire is higher than Vt ₁ in the case of twisting a single wire to manufacture a twisted wire having the same wire diameter. That is, manufacturing a stranded wire having a desired wire diameter from a stranded wire is more effective than manufacturing a stranded wire having a desired wire diameter by twisting a single wire. For this reason, conventionally, a twisted wire having a smaller diameter has been manufactured using the twisted wire as a bus bar. This conventional twisted wire manufacturing apparatus has a structure as shown in FIG. That is, the twisted wire manufacturing apparatus 100 includes a busbar feeder 200, a continuous wire drawing machine 300, and a buncher type twisting machine 400. The busbar feeder 200 is composed of a fixed type supply stand, and quantitatively supplies the twisted wire 500, which is a busbar, to the continuous wire drawing machine 300. Continuous wire drawing machine 300
Includes a plurality of wire drawing dies (or wire drawing rolls) 310 and a plurality of capstans 320. That is,
The plurality of wire drawing dies 310 are arranged on a straight line in the traveling direction of the wire, and the capstans 320 are arranged between the wire drawing dies 310. The capstan 320 is rotatably fixed to a case (not shown). Therefore, the twisted wire that has passed through the plurality of wire drawing dies 310 is suspended by the capstan 320 and passes through the next wire drawing die 310. By repeating this process, when leaving the continuous wire drawing machine 300, a stranded wire 550 having a desired wire diameter (cross-sectional area) is obtained. Stranded wire 55 from this continuous wire drawing machine 300
In the case of 0, the stranded wire 600 is wound around the winding drum 450 while being twisted by the buncher type twisting machine 400 so as to have a predetermined twist pitch.

[Problems to be Solved by the Invention]

As described above, in the conventional continuous wire drawing machine, since the twisted wire is only drawn, the twisted wire has a longer twist pitch after the wire drawing than before the wire draw. . For this reason, in the conventional continuous wire drawing machine, if the twisting pitch is made too long by subjecting the twisted wire to an excessively large area reduction process, a so-called "laughing" uneven portion of twist (twist unevenness) ) Occurs, the so-called "laughing" cannot be completely eliminated even by adjusting the twist with a buncher type wire drawing machine in the subsequent step, and the quality of the twisted wire is not constant. SUMMARY OF THE INVENTION It is an object of the present invention to provide a wire drawing apparatus for a twisted wire that does not cause uneven twisting (twist unevenness) even if the twisting pitch is lengthened and the twist pitch is lengthened. I am trying.

[Means for solving problems]

The first invention of the present application relates to a method for manufacturing a twisted wire, in which a mother twisted wire is supplied at a constant speed and drawn to a predetermined wire diameter, and then twisted at a predetermined twist pitch to manufacture a twisted wire having a desired wire diameter. When a wire having a predetermined diameter is drawn from the mother twisted wire, the wire is drawn while adding a predetermined twist. A second invention of the present application is to form a hole having a cross-sectional area smaller than a cross-sectional area of a mother-stranded wire and to allow the mother-stranded wire to be thinned by passing through the hole, and to reduce the diameter by the wire-drawing means. A plurality of propulsive force applying mechanisms that apply propulsive force to the twisted wires are alternately arranged, and the propulsive force adding mechanisms are configured to rotate with the traveling direction of the twisted wires as a rotation axis, and the propulsive force is passed through the wire drawing means. The twisting wire is applied at a predetermined pitch while applying a propulsive force to the twisted wire at the stage. A third invention of the present application is to arrange a plurality of rolling units each having a propulsive force adding mechanism for rolling a mother twisted wire to reduce the diameter thereof and imparting a propulsive force to the reduced diameter twisted wire, and to perform the rolling operation. The propulsive force adding mechanism of the unit is configured to rotate about the traveling direction of the twisted wire as a rotation axis, and twisting is applied to a predetermined pitch while applying propulsive force to the twisted wire at the stage of passing through the rolling unit. .

【Example】

Examples of the present invention will be described below. FIG. 1 shows an embodiment of the first invention and the second invention of the present application. In the figure, 1 is a twisted wire manufacturing apparatus, and a mother twisted wire feeder 2
And a continuous wire drawing machine 3 and a buncher type twisting machine 4. The mother-stranded wire supply device 2 is composed of a supply stand and supplies the mother-stranded wire at a constant speed (linear speed). The continuous wire drawing machine 3 is a device for drawing the mother twisted wire supplied from the mother twisted wire supply device 2 into a constant wire diameter. 6 is a wire drawing die, and a plurality of (6A to 6N) are provided.
That is, a wire drawing die 6A is provided at the entrance of the apparatus, and behind the wire drawing die 6A is a wire drawing die 6B with a predetermined interval.
Is provided, and the wire drawing die 6C is installed behind it.
A wire drawing die 6D is arranged at a predetermined interval behind 6C, and a plurality of wire drawing dies 6A to 6N are arranged to form wire drawing means. 7A to 7N are columns, which are erected on the floor surface of the continuous wire drawing machine 3 between the plurality of wire drawing dies 6 arranged. 8A to 8N are arms, which are rotatably attached to the columns 7A to 7N by one-sided support. 9A to 9N are capstans, which are attached to arms 8A to 8N, and stranded wires passing through wire drawing dies 6A to 6N are suspended. Further, the capstans 9A to 9N are revolution type capstans, and although not shown, arms 8A to 8N have a drive mechanism built therein, and the drive mechanism allows the arms 8A to 9N to be driven.
It is designed to revolve by rotating 8N. That is, when the arms 8A to 8N are rotated, the capstans 9A to 9N revolve around the support shafts of the arms 8A to 8N. By the revolution of the capstans 9A to 9N, twist is added to the stranded wire suspended from the capstans 9A to 9N. In addition, the capstans 9A to 9N are configured to rotate by a drive mechanism (not shown) built in the arms 8A to 8N, which serve as a drive source when revolving. The capstans 9A to 9N are designed to rotate at a constant speed in the traveling direction of the twisted wire.
A rotation of ~ 9N adds propulsive force to the stranded wire. In FIG. 1, the capstans 9A to 9N have different revolution speeds in the respective capstans. This is because the elongation of the twisting pitch due to the drawing of the twisted wire differs depending on the position of the orifice to be drawn, and it is possible to twist in the best state for maintaining uniformity without causing uneven twist. is there. 10A to 10N are rotating shafts and support columns for supporting capstans 9A to 9N
It is provided between each pillar of 7A-7N. This rotating shaft 10A ~ 1
0N is for transmitting the rotational force at a speed corresponding to the wire drawing for obtaining a predetermined twist pitch to the drive mechanism built in the columns 7A to 7N. Therefore, the rotating shafts 10A to 10N are rotated by a driving means (not shown), the arms 8A to 8N are rotated by the rotation of the rotating shafts 10A to 10N, and the capstans 9A to 9N revolve. Therefore, the rotation of the revolving capstan constitutes a propulsive force adding mechanism. In this way, the continuous wire drawing machine 3 draws the mother stranded wire 5 supplied from the mother stranded wire feeder 2 by the wire drawing die 6A in the first stage, and caps the drawn stranded wire at the outlet side. The rotation (rotation) of the stun 9A gives a pulling force (adding a propulsive force in the traveling direction of the mother twisted wire 5) to pull it out, and twists the twisted wire drawn by the revolution of the capstan 9A. Then, the twisted wire drawn by the twisting runs to the wire drawing die 6B. In the wire drawing die 6B, the second stage wire drawing (making the diameter smaller than the diameter reduced by the wire drawing die 6A)
The pulling force is applied to the drawn stranded wire by rotation (rotation) of the capstan 9B at the exit side (adding propulsive force in the running direction of the mother stranded wire 5) to pull out the capstan 9B.
Add twist to the stranded wire drawn by the revolution of the. And
This twisted wire is drawn and runs to wire drawing die 6C. Capstan 9C adds propulsion and twist, and wire drawing die 6D, capstan 9D ...
... The wire drawing die 6N and the capstan 9N are successively thinned and twisted to obtain a desired wire diameter and a twisted wire. That is, in the present embodiment, in the continuous wire drawing machine 3,
By alternately repeating drawing and twisting, a stranded wire 11 drawn into a desired wire diameter is obtained. Therefore, when the wire drawing process in the continuous wire drawing machine 3 is viewed as a whole,
It means that twisting is added while drawing. The stranded wire 11 thus drawn to a desired wire diameter by the continuous wire drawing machine 3 is finally twisted by the buncher type wire drawing machine 4 to a predetermined twist pitch and wound on the winding drum 12. Rotate the wire drawing dies 6B to 6N except for the first wire drawing die 6A so that even if the twist pitch is extended and the twist pitch is expanded, uneven twisting does not occur. be able to. In this embodiment, a wire drawing die is used as a wire drawing means for drawing the mother twisted wire, but a roller die may be used instead of the wire drawing die. As for the mother-strand feeder, it is also possible to use a rotary type supply stand shown in FIG. 3 in place of the fixed type supply stand shown in FIG. is there. Next, the operation of this embodiment will be described. The mother twisted wire 5 sent from the mother twisted wire supply device 2 passes through the wire drawing die 6A of the continuous wire drawing machine 3, is suspended by the capstan 9A, and then passes through the wire drawing die 6B, and then sequentially to the capstan 9B and the wire drawing die. As is the case with the wire die 6C, the strands 11 having a desired wire diameter are supplied to the buncher type twisting machine 4. This continuous wire drawing machine 3
The driving force of the twisted wire inside is given by the rotation of the capstan 9. Further, since the capstan 9 revolves while the twisted wire passes, twisting is added in the direction in which the twist pitch of the twisted wire is tightened by drawing. In this way, the elongation of the twist pitch is absorbed by the time the next wire drawing die passes so as not to cause so-called "laughing". Therefore, finally, the buncher type twisting machine 4 adjusts to a predetermined twisting pitch, and the final twisted wire 13 is wound up on the winding drum 12. FIG. 2 shows a revolving caterpillar. That is, a revolving caterpillar is used instead of the capstan in the second invention of the present application shown in FIG. FIG. 4 shows an embodiment of the third invention of the present application. In the figure, 50 is a twisted wire manufacturing apparatus, and a twisted wire feeder 60
And a continuous wire drawing machine 70 and a buncher type twisting machine 90. The mother-stranded wire supply device 60 is composed of a supply stand, and supplies the mother-stranded wire at a constant speed (linear speed). Further, the continuous wire drawing machine 70 is a device for drawing the mother twisted wire supplied from the mother twisted wire supply device 60 into a constant wire diameter. 71 is a guide, which is provided at the entrance of the device. Reference numeral 72 denotes a support stand, and a plurality of (72A to 72N) are provided upright on the floor surface of the continuous wire drawing machine 70 behind the guide 71 at predetermined intervals. A rolling unit 73 is rotatably and revolvably attached to each of the support stands 72 by one-sided support (or both supported by the front support stand 72 and the next support stand 72). That is, the rolling unit 73 is a support stand.
Supported by 72, it is designed to rotate and revolve around the earth. Further, inside the rolling unit 73, as shown in FIG. 5, an upper rolling roll 74 and a lower rolling roll 75 are provided. The upper rolling roll 74 is a lower rolling roll by the shaft 76.
The shaft 75 is rotatably supported by support members 78 and 79 by a shaft 77. The upper and lower rolling rolls 74, 75 have semicircular grooves 741, 751 formed around the center thereof, and circular holes are formed by the semicircular grooves 741 and the semicircular grooves 751. It is formed. The twisted wire is drawn by passing through the circular hole formed by the semicircular groove 741 and the semicircular groove 751. The diameter of the circular hole formed by the upper and lower rolling rolls 74 and 75 is gradually reduced as it goes in the traveling direction of the mother-stranded wire 5. That is, the upper and lower rolling rolls
Groove 74 in sequence as it flows backward through 74 and 75
The diameter of 1, 751 is thin. Further, the lower part of the support members 78, 79, the upper and lower rolling rolls 74,
A drive device 80 for rotating 75 is mounted.
The drive device 80 causes the upper and lower rolling rolls 74 and 75 to rotate in the opposite directions at the same speed to apply a propulsive force to the drawn stranded wire. Further, handles 81 and 82 are provided on the support members 78 and 79. The grips 81 and 82 are fitted into mounting portions 86 and 87 of a rotary member 83, which will be described later, and the rolling unit 73
Is attached to the rotating member 83. By attaching the rolling unit 73 to the rotating member 83, the rolling unit 73 is configured to revolve. On the other hand, as shown in FIG. 6, the support stand 72 is provided with a hole 721 through which a stranded wire is inserted. A rotating member 83 is provided around the hole 721. Further, teeth 84 are formed on the outer periphery of the rotating member 83 as shown in FIG. 7, and the teeth 84 are meshed with the gear 85. The gear 85 meshes with a gear 89 attached to a motor 88, as shown in FIG. This gear
85 is attached to the rotating member 83 in order to rotate the rotating direction of the rotating member 83 in the same direction as the rotating direction of the output shaft of the motor 88 and by appropriately selecting the number of teeth of the gear 85. It is used to change the revolution speed of the rolling unit 73 thus set for each rolling unit 73 (for each rotating member 83). In this way, the rotating member 83 is configured to be rotated by the motor 88. As shown in FIG. 7, the rotating member 83 is provided with a ring-shaped bearing 831 so that the bearing 831 can smoothly rotate. Further, the upper rolling roll 74 and the lower rolling roll 75 of the rolling unit 73 are configured to be rotatable in the directions indicated by arrows A and B, respectively, by a drive device 80 provided inside the rolling unit 73. There is. Therefore, when the upper and lower rolling rolls 74 and 75 are rotated, the mother twisted wire 5 can be rolled and drawn, and at the same time, the rolling unit 73 is supported by the supporting stand.
By revolving around the support shaft of 72, twist is added to the mother twisted wire 5 being drawn. In this way, behind the rolling unit 73A, the rolling unit 73B is provided similarly to the rolling unit 73A, and further, the rolling units 73C, 73C ,.
3N is provided. In FIG. 4, the rolling units 73C, 73C, ... 73N have different revolution speeds in the respective rolling units. The revolution speed of the rolling unit 73 is controlled by controlling the rotation speed of the motor 88, or the gear 85 and the rotating member 83.
This is possible by changing the gear ratio with the tooth 84 of the.
In this way, the revolution speed is different in each of the rolling units 73, the elongation of the twisting pitch of the twisted wire is different depending on the position of the rolling roll to be drawn, and the uniformity is achieved without causing twist unevenness. This is to keep the twist in the best condition for keeping and twisting. The upper and lower rolling rolls 74A, 75A, 74A, 75B, 74C, 75C of the rolling units 73A, 73B, 73C ,.
The twisted wire is sandwiched between 74N and 75N, and the twisted wire is gripped by the rolling force of the two rolls of the upper and lower rolling rolls. Therefore, the twisted wire passing through the upper and lower rolling rolls 74 and 75 is added with a propulsive force, and twist can be added to the twisted wire passing through the upper and lower rolling rolls 74 and 75 by the revolution of the upper and lower rolling rolls 74 and 75. . The continuous wire drawing machine 70 draws the mother twisted wire 5 supplied from the mother twisted wire supply device 60 by the rolling rolls 74 and 75 while orbiting the rolling unit 73 to twist the mother twisted wire 5. That is, twisting is applied while drawing the mother stranded wire 5. Stranded wire drawn to a desired wire diameter by this continuous wire drawing machine 70
The buncher type twisting machine 90 twists 11 at a predetermined twisting pitch and winds it up on a winding drum 91. Next, the operation of this embodiment will be described. The mother twisted wire 5 sent from the mother twisted wire supply device 60 is rolled by the upper and lower rolling rolls 74A and 75A of the rolling unit 73A of the continuous wire drawing machine 70, then enters the rolling unit 73B, and the vertical rolling of this rolling unit 73B is performed. Rolled by rolls 74A, 75A,
It passes through the rolling units 73C, 73D, ... 73N to form the twisted wire 11 having a desired wire diameter and is supplied to the buncher type twisting machine 90. The driving force of the twisted wire in the continuous wire drawing machine 70 is applied by the upper and lower rolling rolls 74 and 75. This top and bottom rolling roll 7
Since Nos. 4 and 75 revolve around the stranded wire while passing, twisting is added in the direction of tightening the twist pitch of the stranded wire by drawing. In this way, the twist pitch elongation is absorbed to the extent that so-called "laughter" does not occur by the time when it passes through the next rolling unit. Therefore, finally, the buncher type twisting machine 90 adjusts to a predetermined twisting pitch, and the final twisted wire 92 is wound up on the winding drum 91. As described above, in the third invention of the present application, in the second invention of the present application, the one in which the twist is added to the drawn stranded wire by revolving the capstan 9 which is the propulsion mechanism is a rolling unit. The drawing wire is drawn by a certain upper and lower rolling roll, and at the same time, the upper and lower rolling roll is revolved to add twist to the drawn stranded wire.
In this way, the same effect as that of the second invention of the present application can be obtained by drawing the wire by the upper and lower rolling rolls of the rolling unit and adding the twist at the same time.

【The invention's effect】

According to the first invention of the present application, the production of a twisted wire in which a mother twisted wire is supplied at a constant speed and drawn to a predetermined wire diameter, and then twisted at a predetermined twist pitch to manufacture a twisted wire having a desired wire diameter. In the method, since the wire is drawn while adding a predetermined twist when drawing a twisted wire having a predetermined wire diameter from the mother twisted wire, a large reduction of surface treatment is applied to the twisted wire Even if the length is increased, it is possible to prevent the occurrence of a non-twisted portion (twist unevenness). According to the second invention of the present application, a wire drawing means and a wire drawing means for forming a hole having a cross-sectional area smaller than the cross-sectional area of the mother-stranded wire and passing the hole to reduce the diameter of the mother-stranded wire. By alternately arranging a plurality of propulsive force applying mechanisms for applying a propulsive force to the twisted wire having a smaller diameter, the propulsive force applying mechanism is configured to rotate about the traveling direction of the twisted wire as a rotation axis, and the drawn wire Since it is configured to apply a twist to a predetermined pitch while applying a propulsive force to the twisted wire at the stage of passing through the means, even if the pitch is lengthened and the pitch is lengthened, the twist is not uniform. It is possible to prevent the occurrence of a large portion (twist unevenness). Further, according to the third invention of the present application, a plurality of rolling units are arranged, which rolls the mother-strand wire to reduce the diameter thereof and also has a propulsive force adding mechanism for applying a propulsive force to the reduced-strand wire. In addition, the propulsive force adding mechanism of the rolling unit is configured to rotate about the traveling direction of the twisted wire as a rotation axis, and twist is applied to a predetermined pitch while applying a propulsive force to the twisted wire at the stage of passing through the rolling unit. Since it is configured, it is possible to prevent the occurrence of non-twisted portions (twist unevenness) even if the twisted wire is subjected to a large surface-reduction processing to increase the twist pitch.

[Brief description of drawings]

FIG. 1 is an overall schematic view of a twisted wire manufacturing apparatus showing an embodiment of the first invention and the second invention of the present application, FIG. 2 is a view showing another embodiment of a continuous wire drawing machine, and FIG. FIG. 4 is a diagram showing another embodiment of the mother twisted wire supply device, FIG. 4 is an overall schematic diagram of a twisted wire manufacturing device showing an embodiment of the third invention of the present application, and FIG. 5 is a detailed view of the rolling unit shown in FIG. FIG. 6 is a front view of the support stand shown in FIG. 4, FIG. 7 is a view showing a state in which the rolling unit shown in FIG. 5 is attached to the support stand shown in FIG. 6, and FIG. 8 is a conventional twisted wire manufacturing apparatus. FIG. 1,50 ...... Twisted wire manufacturing equipment 2,60 …… Mother stranded wire feeder 3,70 …… Continuous wire drawing machine 4,90 …… Buncher type twisting machine 5,11,13,92 …… Twisted wire 6 …… Drawing die 7 …… Post 8 …… Arm 9 …… Capstan 10 …… Rotary caterpillar 72 …… Supporting stand 73 …… Rolling unit 74 …… Upper rolling roll 75 …… Lower rolling roll

Claims (3)

[Claims] 1. A method for producing a twisted wire, wherein a mother twisted wire is supplied at a constant speed, drawn to a predetermined wire diameter, and then twisted at a predetermined twist pitch to manufacture a twisted wire having a desired wire diameter. A method for producing a stranded wire, characterized in that when a mother stranded wire is drawn into a stranded wire having a predetermined wire diameter, the wire is drawn while applying a predetermined twist. 2. A wire drawing means for thinning the mother stranded wire by forming a hole having a cross-sectional area smaller than the cross-sectional area of the mother stranded wire and passing the hole, and the wire drawing means A plurality of propulsive force applying mechanisms for applying propulsive force to the twisted wires are alternately arranged, and the propulsive force adding mechanisms are configured to rotate about the advancing direction of the twisted wires as a rotation axis. A twisted wire drawing device, wherein twisting is applied to a predetermined pitch while applying propulsive force to the twisted wire. 3. A plurality of rolling units, each of which has a propulsive force adding mechanism for rolling a mother strand to reduce the diameter thereof and imparting a propulsive force to the thin strand, and to arrange the rolling units. It is characterized in that the propulsive force adding mechanism is configured to rotate about the traveling direction of the twisted wire as a rotation axis, and twist is applied to a predetermined pitch while applying a propulsive force to the twisted wire at the stage of passing through the rolling unit. Stranded wire drawing equipment.