JP4139181B2 - Flat wire manufacturing apparatus and manufacturing method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rectangular wire manufacturing apparatus for forming a round wire into a flat wire and a manufacturing method thereof.
[0002]
[Prior art]
In order to produce a flat wire having an extremely fine and flat cross section, a wire having a circular cross section—copper wire (round wire) —is inserted between a pair of rolling rollers and rolled. And the dimensional accuracy of the rectangular wire to be molded is required to be extremely high precision, and the meandering of the wire rod inserted into the rolling point between the pair of rolling rollers greatly affects the dimensional accuracy of the molded product. It is necessary to prevent meandering.
Therefore, in the conventional production of a flat wire, as shown in FIG. 7, the guide means 41 for the wire 40 is fixed close to the rolling point between the pair of rolling rolls 42, 43, and the wire 40 is fixed. It is fed out from the front side of the rolling point in a straight line and is inserted between the rolls 42 and 43. This prior art is not related to the literature known invention but is used as a general guide means.
[0003]
FIG. 8 is a perspective view of the conventional guide means 41. The guide means 41 is a linear guide member that allows the wire 40 to pass between the pair of guide pieces 44, 44. The dimensions of the wire 40 (outer diameter) ), The gap g between the guide pieces 44 and 44 is adjusted to hold the wire 40 so that it does not swing left and right (does not meander).
[0004]
[Problems to be solved by the invention]
The dimensional accuracy of the rectangular wire to be molded is required to be very high, especially in the product thickness standard (dimension tolerance) of the specified thickness of ± 0.001 to ± 0.005 mm.
However, in the conventional guide means 41, it is difficult to adjust the installation position, and the gap g between the guide pieces 44, 44 appropriate for the dimensions of the wire 40 must be adjusted. It is difficult to satisfy enough. In other words, it is necessary to guide the wire 40 at a position close to the rolling point at which the wire 40 is rolled by the pair of rolling rolls 42 and 43, but in order to avoid contact with the upper and lower rolls 42 and 43, to prevent meandering The guide means 41 cannot be arranged at a sufficiently close position that is effective. Further, there is a drawback that the wire 40 is scratched by the guide piece 44, or copper powder or the like is generated and adheres to the wire 40, thereby affecting the product dimensions and characteristics. On the other hand, when the gap g between the guide pieces 44, 44 is increased, the wire 40 is meandering, and the wire 40 with a bend is particularly easy to meander, and there is a disadvantage that the dimensions of the molded product vary.
Furthermore, if the diameter of the wire 40 is changed, it is necessary to adjust the guide means 41 each time, and there is a disadvantage that productivity is poor.
[0005]
Accordingly, an object of the present invention is to provide a rectangular wire manufacturing apparatus and a manufacturing method thereof that can prevent meandering of a wire to be inserted and can manufacture a rectangular wire with high precision and dimensional accuracy.
[0006]
[Means for Solving the Problems]
In order to achieve the above-described object, the flat wire manufacturing apparatus according to the present invention produces a flat wire having a rectangular cross section by rolling a metal wire having a circular cross section at a rolling point between a pair of rolling rolls. In the flat wire manufacturing apparatus, the wire is in contact with the outer peripheral surface at an angle of 10 ° to 90 ° on the outer peripheral surface of one of the pair of rolling rolls from the incident point upstream of the rolling point . An outer peripheral surface of the roll comprising a feeding means for feeding out the wire so as to make contact within a range of a central angle, and an arc surface having a contact length of 1/8 or more of the contact length of the wire to the one roll and incoming guide means for the bracing of the wire in contact with, but having a.
The feeding means preferably has a rotating sheave that changes the traveling direction of the wire and guides the wire so that the wire contacts the outer peripheral surface of the roll on the upstream side of the rolling point.
[0007]
In order to achieve the above-described object, a method for producing a rectangular wire according to the present invention is to form a rectangular wire having a rectangular cross section by rolling a metal wire having a circular cross section at a rolling point between a pair of rolling rolls. In the flat wire manufacturing method, the wire is caused to travel so as to contact the outer peripheral surface of one of the pair of rolling rolls within a range of a central angle of 10 ° to 90 ° , and the one roll of the wire The wire rod that is in contact with the outer peripheral surface of the one roll by the guide guide means provided with an arc surface portion having a contact length of 1/8 or more of the contact length to Rolling into a flat cross-sectional shape at the rolling point between the pair of rolls.
In addition, before the wire rod contacts the outer peripheral surface of the roll, the wire rod is guided so that the wire rod contacts the outer peripheral surface of the roll after changing the traveling direction of the wire rod, Contact the outer peripheral surface of the roll.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail based on the illustrated embodiment.
[0009]
The flat wire (flat wire) manufactured by the flat wire manufacturing apparatus according to the present invention is used, for example, as a magnet wire in which an insulating film is formed around in the next process, and the flat wire is made of metal. (Made of copper) and has a substantially rectangular cross section ---- a flat rectangular shape--.
FIG. 1 is a perspective view showing an embodiment of a flat wire manufacturing apparatus according to the present invention, and FIG. 2 is a side view showing an outline of the apparatus. This device, the rolling point A between the rotation axis L _1, a pair of rolling L ₂ is parallel rolls R _1, R _2, and rolled by incoming line wire material M of circular cross section, rectangular cross-sectional rectangular shape The line N is produced.
[0010]
The pair of rolling rolls R ₁ and R ₂ are arranged such that the side circumferential surfaces face each other with a predetermined gap, and are rotated in a direction (arrows a and b) in which the wire M is drawn by a drive mechanism (not shown). To do. A rolling point A is defined between the pair of rolling rolls R ₁ and R ₂ , and on the outer peripheral surface of the rotating rolling rolls R ₁ and R ₂ , the incoming side (inlet side) of the wire M from the rolling point A − In FIG. 2, the right side from the rolling point A is the upstream side, and the outlet side from the rolling point A is the left side from the rolling point A in FIG. Further, the wire M input side of the pair of rolling rolls R ₁ and R ₂ is the front side, and the flat wire N take-out side is the rear side.
[0011]
And the flat wire manufacturing apparatus which concerns on this invention is provided with the drawing | feeding means 1 which pays out the wire M wound around the bobbin (drum) outside a figure continuously, and the drawing | feeding means 1 is a pair of rolling. The wire M is fed out so as to contact from the upstream position of the rolling point A on the outer peripheral surface of _one of the rolls R ₁ and R ₂ . That is, as shown in FIG. 2, the feeding means 1 is disposed on the front side (side side) of the upper side (one side) roll R ₁ and is positioned above the rolling point A—the rolling point. It is assumed that the axis L ₁ side of the roll R ₁ is more than the A side in this embodiment. In this embodiment, the wire M is moved downward—in the direction toward the roll R _{2 ——} a feeding guide mechanism to be incident so as to be in contact with the outer peripheral surface of the _1. In other words, the wire M is incident becomes roller R ₁ of tangential. Incidentally, the contact start site of the roll R ₁ of the wire M is the incident point B of the wire M.
[0012]
That is, by bringing the wire M into contact with the roll R ₁ (or R ₂ ) on one side upstream from the rolling point A, the wire rod is caused by friction (contact resistance) between the roll R ₁ (or R ₂ ) and the wire M. M does not meander from side to side, and is guided straight and can be kept in a stable incoming line state. Moreover, since the wire M enters the rolling point A in a free state without being guided and is not rolled, generation of copper powder (abrasion powder) is suppressed, and an accurate product can be obtained. That is, in this manufacturing apparatus, the traveling upstream side (bobbin side) of the wire M from the incident point B is a traveling section in the free state of the wire M, and the position of the wire M is maintained from the incident point B to the rolling point A. This is the position holding section to be performed.
[0013]
The range of rolling point A to the incident point B is the contact portion between the wire M and the outer circumferential surface of the roll R _1, the the contact area is central angle θ of the roll R ₁ is a 10 ° to 90 ° Is preferred. If the angle θ is smaller than the lower limit value, the holding of the wire M by friction with the roll R ₁ is not stable, and the wire M may meander, and even if the angle θ is larger than the upper limit value, Position retention does not improve.
[0014]
Moreover, this manufacturing apparatus comprises a incoming line guide means 2 for performing the traveling direction lateral bracing of the wire M in contact with the outer peripheral surface of the roll R _1. Incoming line guide means 2 is for positional regulation across from both sides side of the wire M which has contact with the outer peripheral surface of the roll R _1, there is shown in a side view and a plan view of FIG. 4 in FIG. The entry guide means 2 is fixed by an arm member 7 that protrudes in the direction of the rolling point A from a fixing member (not shown) on the front side of the pair of rolls R ₁ and R ₂ .
[0015]
The wire guide means 2 includes a pair of guide blocks 4 and 4 that sandwich the wire M from both the left and right sides and whose longitudinal direction is the wire direction of the wire M, and the guide block 4 has an outer peripheral surface shape of the roll R _1. a concave circular surface 5 along a sidewall portion 6 which is perpendicular to the outer peripheral surface of the roll R _1, has, circular surface 5,5 of the pair of guide blocks 4, 4 constitutes one arcuate surface The side wall parts 6 and 6 are configured to face each other. That is, the radius of the circular surface 5 of the guide block 4 is substantially equal to the radius of the roll R _1, such that the circular surface 5 is facing the roll R ₁ in substantially contact with the roll R _1, the incoming guide means 2 It is installed in front of rolling point A. Furthermore, since the incoming line guide means 2 (side wall part 6) is tapered toward the direction approaching the rolling point A, the guide means 2 can be installed very close to the rolling point A.
[0016]
Then, the side wall portions 6 and 6 of the pair of guide blocks 4 and 4 prevent the wire M that is in contact with the outer peripheral surface of the roll R _{1 from} swinging. At this time, since the circular arc surface portions 5 and 5 of the guide blocks 4 and 4 are substantially in contact with the outer peripheral surface of the roll R ₁ , the wire M can be securely rolled to the roll R even if the diameter of the wire M is small (thinner). ₁ can be brought into contact and can be steady.
Furthermore, although not shown, the incoming line guide means 2 is resiliently urging the direction toward the axis L ₁ of the roll R _1, even if that circular surface 5,5 is brought into contact with the outer peripheral surface of the roll R ₁ Good. Thereby, the incoming line guide means 2 can hold | maintain the side surface of the wire M reliably.
[0017]
Further, the contact length of the roll R ₁ of the arc surface portion 5 of the incoming line guide means 2 is set to be 1/8 or more of the contact length of the roll R ₁ of the wire M. That is, the arc length of the arc surface portion 5 is set to be 1/8 or more of the arc length from the incident point B to the rolling point A.
If the length is shorter than 1/8, the accuracy may vary due to the influence of runout and wrinkle at the time of incoming line. Therefore, the structure which hold | maintains as long as possible is preferable on the structure of an apparatus.
[0018]
Next, a method for producing a rectangular wire by this rectangular wire production apparatus will be described. The wire M having a circular cross section is inserted into the rolling point A between the pair of rolling rolls R ₁ and R ₂ and rolled. It is formed into a flat rectangular wire N.
More specifically, as shown in FIG. 1 and FIG. 2, first, the wire M has a center angle θ of 10 ° to 90 ° on the outer peripheral surface of _one of the pair of rolling rolls R ₁ and R ₂ . Drive to make contact in range. Note that the center angle here, connecting the straight line (a surface) connecting the axis L _1, L ₂ of the pair of rolls R _1, R _2, the axis L ₁ of the roll R ₁ and the above incident point B It is the angle formed with a straight line.
[0019]
Then, the incoming line guide means 2 described above, while the left and right slide stop of the wire M in contact along one circumferential surface of the roll R _1, the wire M in the rolling point A between the pair of rolls R _1, R ₂ And rolled into a flat cross-sectional shape.
[0020]
FIG. 5 is a perspective view showing another embodiment of the flat wire manufacturing apparatus of the present invention, and FIG. 6 is a side view showing the outline thereof. In this apparatus, the feeding means 1 includes a rotating sheave 3 having an axis L ₃ parallel to the axes L ₁ and L ₂ of the pair of rolls R ₁ and R ₂ . By this rotation sheave 3, to change the running direction of the wire M, so that the wire M meet at the upstream side of the rolling point A to the outer peripheral surface of the roll R _1, is intended to induce the wire M. More specifically, after changing the traveling direction of the wire M from the direction farther from the rolling point A (upward) to the direction closer to the rolling point A (downward), the wire M is made incident on the roll R ₁ . Yes.
[0021]
According to this rotating sheave 3, before the wire M contact at an upstream position than the rolling point A on the outer peripheral surface of the roll R ₁ (incident point B), the wire M from by changing the running direction of the wire M rolls so as to contact the outer peripheral surface of the R _1, to induce the wire M, by the roll R ₁ and sheave 3, is contacting the wire M to the outer peripheral surface of the roll R ₁ is given tension (tension) to the wire M it can. By providing the rotating sheave 3, particularly thin flat wire, even have a habit wound by a bobbin, without the wire M is threaded, it can enter the roll R _1.
[0022]
1 to 6, the wire M is brought into contact with the upper roll R _1. However, the feeding portion 1 is moved from the rolling point A so that the wire M is brought into contact with the lower roll R _2. May be provided at the lower position, and the incoming line guide means 2 may be disposed on the roll R ₂ side, and the operation and effect thereof are the same.
[0023]
【The invention's effect】
The present invention has the following effects by the above-described configuration.
[0024]
(According to claim 1 or 3) Since the wire M is placed along _one roll R ₁ and rolled with the other roll R ₂ , the rectangular wire N has high dimensional accuracy with little variation among products. Can be manufactured.
The wire M can be inserted into the rolling point A without flickering (without meandering), and a stable entry state can be maintained.
[0025]
The (claim According to 2) the roll R ₁ and the rotary sheave 3, while no tension to the wire M, to stop guide shake located retain the wire M, be incoming line stably even very thin wires M This can improve product accuracy.
[0026]
(According to claim 4) While the wire M is stretched, the wire M is inserted into the roll R ₁ , and the wire M is held in position and guided to steady, so that even a very thin wire M can be stably input. Can improve product accuracy.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a main part of an embodiment of a flat wire manufacturing apparatus according to the present invention.
FIG. 2 is a side view schematically showing a flat wire manufacturing apparatus according to the present invention.
FIG. 3 is a side view of the incoming line guide means.
FIG. 4 is a plan view of incoming line guide means.
FIG. 5 is a perspective view showing the main part of another embodiment of the flat wire manufacturing apparatus according to the present invention.
FIG. 6 is a side view schematically showing a flat wire manufacturing apparatus according to the present invention.
FIG. 7 is a perspective view of a conventional rectangular wire manufacturing apparatus.
FIG. 8 is a perspective view of a conventional guide means.
[Explanation of symbols]
1 Feeding means 2 Entrance guide means 3 Rotating sheave
5 Arc face A Rolling point
B Incident point M Wire rod N Flat wire R ₁ roll R ₂ roll θ Center angle

Claims (4)

A flat wire for producing a rectangular wire (N) having a rectangular cross section by rolling a metal wire (M) having a circular cross section at a rolling point (A) between a pair of rolling rolls (R ₁ ) and (R ₂ ). In the wire manufacturing apparatus, the wire (M) is positioned upstream of the rolling point (A) on the outer peripheral surface of _{one of the} pair of rolling rolls (R ₁ ) (R ₂ ). A feeding means (1) for feeding out the wire (M) so as to be in contact with the outer peripheral surface within a range of a central angle (θ) of 10 ° to 90 ° in contact with the incident point (B) of the wire , and the wire (M) Of the wire rod (M) having an arc surface portion (5) having a contact length of 1/8 or more of the contact length to the _one roll (R ₁ ) and in contact with the outer peripheral surface of the roll (R ₁ ) A flat wire manufacturing apparatus comprising: an incoming line guide means (2) for preventing the steady state. The feeding means (1) changes the traveling direction of the wire (M) so that the wire (M) contacts the outer peripheral surface of the roll (R ₁ ) on the upstream side of the rolling point (A). 2. The rectangular wire manufacturing apparatus according to claim 1, further comprising a rotating sheave (3) for guiding (M). A rectangular wire having a circular cross section of metal wire (M) at a rolling point (A) between a pair of rolling rolls (R ₁ ) and (R ₂ ) and rolled into a rectangular wire (N) having a rectangular cross section. In the production method, the wire (M) is placed on the outer peripheral surface of _one roll (R ₁ ) of the pair of rolling rolls (R ₁ ) (R ₂ ) at a central angle (θ) of 10 ° to 90 °. Incoming guide means provided with an arcuate surface portion (5) having a contact length of 1/8 or more of the contact length of the wire (M) to the one roll (R ₁ ). while the lateral steadying of the one of the rolls (R ₁₎該線material in contact along the outer surface of (M) by (2),該線material (M) is of the pair rolls (R ₁₎ (R ₂ A method for producing a rectangular wire, which is rolled into a rectangular shape in cross section at the rolling point (A). Before the wire (M) is in contact with the outer peripheral surface of the roll (R _1),該線materials were allowed to change the running direction of the該線material (M) (M) in contact with the outer peripheral surface of the roll (R ₁₎ Yo induce該線material to (M), flat wire manufacturing method according to claim 3, wherein contacting the outer peripheral surface of the roll giving tension to該線material (M) (R _1).

Images