Incoming line angle enlargement suppression device and method for producing enamel wire

Abstract

To provide an incoming line angle enlargement suppression device and a method for producing an enamel wire.SOLUTION: An enamel wire producing device is equipped with a mechanism that passes a rolled conductor or a flat conductor through a flat wire drawing dies. The wire entry angle expansion suppression device is equipped with a measurement unit and an adjustment unit. The measurement unit, in the enamel wire producing device, measures the pitch angle, yaw angle, and roll angle of the rolled conductor or flat conductor relative to the flat rectangular wire drawing die. The adjustment unit, located upstream of the flat rectangular wire drawing die, moves or rotates the rolled conductor or flat conductor in a direction that reduces the pitch angle, yaw angle, and roll angle measured by the measurement unit.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present disclosure relates to an entrance angle expansion suppression device and a method for manufacturing an enameled wire. [Background technology]

[0002] An enameled wire comprises a conductor and an enamel coating. The conductor is mainly made of copper. The enamel coating covers the surface of the conductor. Patent Documents 1 and 2 describe methods for manufacturing enameled wire. In this method, a paint is applied to the surface of the conductor to form a coating film. The paint contains polyimide or polyamideimide. The enamel coating is then formed by baking. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6730930 [Patent Document 2] Japanese Patent Application Laid-Open No. 2015-36149 Summary of the Invention [Problem to be solved by the invention]

[0004] Enameled wire includes rectangular enameled wire. The conductor of rectangular enameled wire is a rectangular conductor. A rectangular conductor is a conductor with a rectangular cross section. A rectangular conductor is obtained by performing round wire drawing, rolling, and rectangular wire drawing on a steel material called a wire rod. A conductor that has been rolled is a rolled conductor.

[0005] Flat wire drawing is a process in which a rolled conductor or a flat conductor is passed through a flat wire drawing die, whose processing hole is shaped like a flat wire. If the entry angle of the conductor into the wire drawing die is large, friction at the interface between the wire drawing die and the conductor increases. If friction is large, the conductor is worn by the wire drawing die, and more copper powder is generated. If more copper powder is generated, more copper powder adheres to the conductor surface. If paint is applied to the surface of a conductor when there is a large amount of copper powder adhering to the surface, microbubbles are likely to form in the paint film. If the paint film is fired with microbubbles formed in it, the microbubbles will foam, causing an abnormal appearance in the enamel coating.

[0006] In one aspect of the present disclosure, it is preferable to provide an entrance angle expansion suppression device and an enameled wire manufacturing method that can suppress appearance abnormalities in an enamel coating. [Means for solving the problem]

[0007] One aspect of the present disclosure is an enameled wire manufacturing apparatus having a mechanism for passing a rolled conductor or a flat conductor through a flat wire drawing die, the enameled wire manufacturing apparatus comprising: a measuring unit configured to measure the pitch angle, yaw angle, and roll angle of the rolled conductor or the flat conductor relative to the flat wire drawing die; and an adjustment unit configured to move or rotate the rolled conductor or the flat conductor upstream of the flat wire drawing die in a direction that reduces the pitch angle, yaw angle, and roll angle measured by the measuring unit.

[0008] An entrance angle expansion suppression device according to one aspect of the present disclosure can suppress appearance abnormalities in an enamel coating. Another aspect of the present disclosure is a method for manufacturing an enameled wire, including a step of passing a rolled conductor or a rectangular conductor through a rectangular wire drawing die, measuring the pitch angle, yaw angle, and roll angle of the rolled conductor or the rectangular conductor relative to the rectangular wire drawing die, and moving or rotating the rolled conductor or the rectangular conductor upstream of the rectangular wire drawing die in a direction that decreases the measured pitch angle, yaw angle, and roll angle. According to a method for producing an enameled wire that is another aspect of the present disclosure, it is possible to suppress abnormalities in the appearance of the enamel coating. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is an explanatory diagram illustrating the configuration of an enameled wire manufacturing apparatus. [Figure 2] FIG. 2 is a cross-sectional view showing the cross-sectional shape of a rolled conductor. [Figure 3] FIG. 2 is a cross-sectional view showing the cross-sectional shape of a rectangular conductor. [Figure 4] FIG. 1 is an explanatory diagram showing the configuration of a rectangular wire drawing machine. [Figure 5] FIG. 4 is an explanatory diagram showing a pitch angle. [Figure 6] FIG. 2 is an explanatory diagram showing a yaw angle. [Figure 7] FIG. 2 is an explanatory diagram illustrating a roll angle and a method for measuring the roll angle. [Figure 8] FIG. 4 is an explanatory diagram showing a method for measuring a pitch angle. [Figure 9] FIG. 2 is an explanatory diagram showing a method for measuring a yaw angle. DETAILED DESCRIPTION OF THE INVENTION

[0010] Exemplary embodiments of the present disclosure will now be described with reference to the drawings. First Embodiment 1. Overall configuration of enameled wire manufacturing equipment 1 The overall configuration of an enameled wire manufacturing apparatus 1 will be described with reference to Figures 1 to 3. As shown in Figure 1, the enameled wire manufacturing apparatus 1 includes a bobbin 3, a round wire drawing machine 5, a flat wire rolling mill 7, an annealing furnace 9, a flat wire drawing machine 11, an annealing furnace 13, a paint applicator 15, a baking furnace 17, and a winder 19.

[0011] A linear conductor 23 is wound around the bobbin 3. The conductor 23 is drawn out from the bobbin 3, travels along a route that passes through the round wire drawing machine 5, the rectangular rolling mill 7, the annealing furnace 9, the rectangular wire drawing machine 11, the annealing furnace 13, the paint applicator 15, and the baking furnace 17 in this order, and is wound onto the winder 19. However, the conductor 23 passes through the section that includes the paint applicator 15 and the baking furnace 17 multiple times.

[0012] The material of the conductor 23 is, for example, copper or a copper alloy. The cross-sectional shape of the conductor 23 is circular until it is subjected to flat-rolling, which will be described later. The cross-section of the conductor 23 is a cross section perpendicular to the longitudinal direction of the conductor 23.

[0013] The round wire drawing machine 5 draws the conductor 23 having a circular cross section. The flat wire rolling machine 7 performs flat wire rolling on the traveling conductor 23. The conductor 23 that has been subjected to flat wire rolling is referred to as a rolled conductor 23A.

[0014] As shown in Fig. 2, the cross-sectional shape of the rolled conductor 23A is a shape formed by two parallel sides 24A, 24B and two arc-shaped end faces 26A, 26B. In the cross-section, the sides 24A, 24B are straight. In the cross-section, the lengths of the sides 24A, 24B are greater than the lengths of the end faces 26A, 26B. The annealing furnace 9 anneals the rolled conductor 23A.

[0015] The flat wire drawing machine 11 performs flat wire drawing on the traveling rolled conductor 23A. Flat wire drawing is a process of drawing the rolled conductor 23A. The conductor 23 that has undergone flat wire drawing is referred to as a flat conductor 23B. The configuration of the flat wire drawing machine 11 will be described later.

[0016] The cross-sectional shape of the rectangular conductor 23B is rectangular as shown in Fig. 3. The long sides of the rectangle are sides 24A and 24B. The short sides 22A and 22B of the rectangle are sides that originate from end faces 26A and 26B of the rolled conductor 23A.

[0017] As shown in Figure 1, the direction in which the conductor 23 travels in the rectangular wire drawing machine 11 is referred to as the traveling direction TR. The opposite direction to the traveling direction TR is referred to as the upstream direction US. The annealing furnace 13 anneals the rectangular conductor 23B. The paint applicator 15 applies enamel paint to the surface of the rectangular conductor 23B, forming an enamel paint film of a predetermined thickness on the surface of the rectangular conductor 23B.

[0018] The baking furnace 17 applies heat to the running rectangular conductor 23B, which has been coated with an enamel coating of a predetermined thickness by the coating applicator 15, to form a coating. As shown in Figure 1, the application of enamel coating by the coating applicator 15 and the coating formation by the baking furnace 17 are repeated. As a result, an enameled wire 25 having a predetermined coating thickness is produced. The enameled wire 25 is then wound onto the winder 19.

[0019] The coating is formed, for example, as follows: Enamel wire paint is applied to the surface of the rectangular conductor 23B. The enamel wire paint is, for example, a paint containing a resin and a solvent. Next, the solvent in the enamel wire paint applied to the surface of the rectangular conductor 23B is evaporated, and the resin in the enamel wire paint is hardened. After the solvent has evaporated and the resin has hardened, the enameled wire 25 is formed.

[0020] 2. Configuration of the flat wire drawing machine 11 The configuration of the flat wire drawing machine 11 will be described with reference to Fig. 4 to Fig. 9. As shown in Fig. 4, the flat wire drawing machine 11 includes a flat wire drawing die 31 and an entry angle expansion suppressing device 33.

[0021] The flat wire drawing die 31 has a flat-shaped processing hole 35. The conductor 23 passes through the processing hole 35 while traveling in the traveling direction TR. The conductor 23 before passing through the processing hole 35 is a rolled conductor 23A. The conductor 23 after passing through the processing hole 35 is a flat conductor 23B. The flat wire drawing machine 11 corresponds to a mechanism that passes the rolled conductor 23A through the flat wire drawing die 31.

[0022] The entrance angle divergence suppression device 33 includes a measurement unit 37, an adjustment unit 39, and a control unit 41. The measurement unit 37 can measure the pitch angle θ, the yaw angle δ, and the roll angle γ. The pitch angle θ, the yaw angle δ, and the roll angle γ correspond to the entrance angle.

[0023] The pitch angle θ will be explained with reference to Fig. 5. Fig. 5 is a view of the conductor 23 and the rectangular wire drawing die 31 viewed from a horizontal direction (hereinafter referred to as the left-right direction RL) perpendicular to the running direction TR. A reference line SL is a straight line coinciding with the axial direction of the processing hole 35. In Fig. 5, the angle formed by the reference line SL and the rolled conductor 23A located in the upstream direction US of the rectangular wire drawing die 31 is the pitch angle θ.

[0024] The yaw angle δ will be explained with reference to Figure 6. Figure 6 is a view of the conductor 23 and the flat wire drawing die 31 viewed from the up-down direction V. The up-down direction V is a direction perpendicular to the horizontal plane. The up-down direction V is perpendicular to the left-right direction RL. In Figure 6, the angle formed between the rolled conductor 23A, which is located in the upstream direction US of the flat wire drawing die 31, and the reference line SL is the yaw angle δ.

[0025] The roll angle γ will be explained with reference to Figure 7. Figure 7 is a view of the cross section of the rolled conductor 23A viewed from a direction perpendicular to the left-right direction RL and the up-down direction V, in the upstream direction US from the flat wire drawing die 31. In Figure 7, the roll angle γ is the angle between a perpendicular line 28 to the sides 24A and 24B and the up-down direction V. The roll angle γ is also the angle between a parallel line 30 parallel to the sides 24A and 24B and the left-right direction RL. The roll angle γ is an acute angle.

[0026] As shown in FIG. 4, the measurement section 37 is composed of a first measurement unit 43 and a second measurement unit 45. The first measurement unit 43 measures the pitch angle θ and the roll angle γ. The first measurement unit 43 is located upstream of the flat wire drawing die 31 in the US direction. The distance from the flat wire drawing die 31 to the first measurement unit 43 is a first distance x1. The first distance x1 is the distance in the upstream direction US. The position of the first measurement unit 43 corresponds to the first measurement position. Note that the first measurement unit 43 and the second measurement unit 45 can be, for example, a 2D high-speed dimension measuring instrument, TM-3000 series, manufactured by Keyence Corporation.

[0027] 8, the first measurement unit 43 includes a first irradiator 51, a first light receiver 53, and a first detector 55. The first irradiator 51 irradiates parallel light 57 toward the first light receiver 53. The irradiation direction of the parallel light 57 is parallel to the left-right direction RL and perpendicular to the up-down direction V. The irradiation direction of the parallel light 57 is also horizontal.

[0028] The first light receiving unit 53 is spaced apart from the first irradiating unit 51 in the left-right direction RL. The first light receiving unit 53 receives the parallel light 57 on a light receiving surface having a predetermined area. The rolled conductor 23A is sandwiched between the first irradiating unit 51 and the first light receiving unit 53. That is, the first light receiving unit 53 is arranged so as to sandwich the rolled conductor 23A between itself and the first irradiating unit 51. The first detecting unit 55 calculates the pitch angle θ and the roll angle γ based on the parallel light 57 received by the first light receiving unit 53. This will be described in detail later.

[0029] The second measuring unit 45 measures the yaw angle δ. As shown in FIG. 4, the second measuring unit 45 is located in the upstream direction US from the flat wire drawing die 31. The distance from the flat wire drawing die 31 to the second measuring unit 45 is a second distance x2. The second distance x2 is the distance in the upstream direction US. In this embodiment, the second distance x2 is smaller than the first distance x1. The second distance x2 may be larger than the first distance x1. The position of the second measuring unit 45 corresponds to the second measurement position.

[0030] 9, the second measurement unit 45 includes a second irradiator 61, a second light receiver 63, and a second detector 65. The configurations of the second irradiator 61, the second light receiver 63, and the second detector 65 are basically the same as the configurations of the first irradiator 51, the first light receiver 53, and the first detector 55.

[0031] However, as shown in FIG. 9, the second irradiating unit 61 and the second light receiving unit 63 are aligned in the up-down direction V. The irradiation direction of the parallel light 67 is parallel to the up-down direction V and perpendicular to the left-right direction RL. The rolled conductor 23A is sandwiched between the second irradiating unit 61 and the second light receiving unit 63. That is, the second light receiving unit 63 is disposed so as to sandwich the rolled conductor 23A between itself and the second irradiating unit 61. The second detecting unit 65 calculates the yaw angle δ based on the parallel light 67 received by the second light receiving unit 63. This will be described in more detail later.

[0032] 4, the adjustment unit 39 is located upstream in the US direction relative to the measurement unit 37. The adjustment unit 39 is in contact with the rolled conductor 23A via a plurality of rollers 71. The rolled conductor 23A passes through a position sandwiched between the plurality of rollers 71.

[0033] The adjustment unit 39 can move in both the up-down direction V and the left-right direction RL. When the adjustment unit 39 moves, the position of the rolled conductor 23A when it passes through the adjustment unit 39 also moves. When the position of the rolled conductor 23A when it passes through the adjustment unit 39 moves, the pitch angle θ or the yaw angle δ changes. For example, when the adjustment unit 39 moves in the up-down direction V, the pitch angle θ changes. Furthermore, when the adjustment unit 39 moves in the left-right direction RL, the yaw angle δ changes.

[0034] The adjustment unit 39 can rotate in either direction around the traveling direction TR as the rotation axis. When the adjustment unit 39 rotates, the roll angle γ changes. The control unit 41 acquires the pitch angle θ, roll angle γ, and yaw angle δ from the measurement unit 37. The control unit 41 instructs the adjustment unit 39 to move or rotate. The adjustment unit 39 moves or rotates in accordance with the instruction. The direction and amount of movement or rotation in the adjustment unit 39 are the direction and amount by which the pitch angle θ, roll angle γ, or yaw angle δ decreases. The enameled wire manufacturing apparatus 1 can be used to implement a method for manufacturing an enameled wire. The method for manufacturing an enameled wire includes a step of passing a rolled conductor 23A through a rectangular wire drawing die 31. The method for manufacturing an enameled wire also includes a step of measuring a pitch angle θ, a yaw angle δ, and a roll angle γ. The method for manufacturing an enameled wire also includes a step of moving or rotating the rolled conductor 23A in a direction upstream US from the rectangular wire drawing die 31 such that the measured pitch angle θ, yaw angle δ, and roll angle γ decrease.

[0035] 3. Calculating the incoming angle (3-1) Measurement of pitch angle θ The first measuring unit 43 measures the pitch angle as follows. As shown in Fig. 8, the first detecting unit 55 detects the position y of the rolled conductor 23A in the vertical direction V based on the parallel light 57 received by the first light receiving unit 53. The position y is the distance in the vertical direction V between the rolled conductor 23A and the reference line SL. As shown in Fig. 5, the position at which the position y is measured is a position that is a first distance x1 away from the flat wire drawing die 31.

[0036] The principle of detecting the position y is as follows. The first light receiving unit 53 basically receives the parallel light 57 over the entire surface. However, a shadow 59 is generated on the first light receiving unit 53 when the parallel light 57 is blocked by the rolled conductor 23A. The first detection unit 55 detects the position of the shadow 59 in the vertical direction V.

[0037] In the vertical direction V, the position of the shadow 59 is equal to the position of the rolled conductor 23A. Therefore, the first detection unit 55 calculates the distance between the shadow 59 and the reference line SL in the vertical direction V, and sets this distance as the position y. When calculating the distance between the shadow 59 and the reference line SL, for example, the distance between the center of the shadow 59 and the reference line SL is calculated.

[0038] As shown in FIG. 5, the following equation (1) holds for the position y and the first distance x1. Equation (1) tanθ=y / x1 The first detector 55 calculates the pitch angle θ by substituting the position y and the first distance x1 into equation (1).

[0039] (3-2) Measurement of yaw angle δ The second measuring unit 45 measures the yaw angle δ as follows. As shown in FIG. 9, the second detecting unit 65 detects the position z of the rolled conductor 23A in the left-right direction RL based on the parallel light 67 received by the second light receiving unit 63. The position z is the distance in the left-right direction RL between the rolled conductor 23A and the reference line SL. As shown in FIG. 6, the position z is measured at a position that is a second distance x2 from the flat wire drawing die 31. The position z corresponds to a position in the horizontal direction.

[0040] The principle of detecting the position z is as follows. The second light receiving unit 63 basically receives the parallel light 67 over the entire surface. However, a shadow 69 is generated on the second light receiving unit 63 when the parallel light 67 is blocked by the rolled conductor 23A. The second detection unit 65 detects the position of the shadow 69 in the left-right direction RL.

[0041] In the left-right direction RL, the position of the shadow 69 is equal to the position of the rolled conductor 23A. Therefore, the second detection unit 65 calculates the distance in the left-right direction RL between the shadow 69 and the reference line SL, and sets this distance as the position z. When calculating the distance between the shadow 69 and the reference line SL, for example, the distance between the center of the shadow 69 and the reference line SL is calculated.

[0042] As shown in FIG. 6, the following equation (2) holds for the position z and the second distance x2. Equation (2) tanδ=z / x2 The second detection unit 65 calculates the yaw angle δ by substituting the position z and the second distance x2 into equation (2).

[0043] (3-3) Measurement of roll angle γ The first measuring unit 43 measures the roll angle γ as follows. In Fig. 7, W is the apparent thickness of the rolled conductor 23A as seen from the irradiation direction of the parallel light 57. The irradiation direction of the parallel light 57 is perpendicular to the running direction TR of the rolled conductor 23A. In this embodiment, the irradiation direction of the parallel light 57 is parallel to the left-right direction RL and perpendicular to the up-down direction V.

[0044] 7, the thickness W is equal to the length of the shadow 59 in the vertical direction V. The first detection unit 55 calculates the length of the shadow 59 in the vertical direction V and defines this length as the thickness W. Regarding the lengths and angles of the configuration shown in FIG. 7, the following formulas (3) to (5) hold true.

[0045] Equation (3) cosα=W / A Equation (4) cosβ=B / A Equation (5) α=β-γ 7, α is the angle formed between the diagonal line 34 of the rolled conductor 23A and the vertical direction V. β is the angle formed between the perpendicular line 28 and the diagonal line 34 in FIG. 7. A is the width of the rolled conductor 23A in the direction parallel to the sides 24A and 24B. B is the thickness of the rolled conductor 23A in the direction perpendicular to the sides 24A and 24B. A is greater than B.

[0046] Equation (6) is obtained from equations (3) to (5). Equation (6) γ=cos -1 (B / A)-cos -1 (W / A) The first detection unit 55 calculates the roll angle γ by substituting the thickness W calculated as above and the known values ​​A and B into equation (6).

[0047] 4. Effects of the entrance angle expansion suppression device 33 (1A) The entrance angle divergence suppression device 33 can measure the pitch angle θ, the yaw angle δ, and the roll angle γ. The entrance angle divergence suppression device 33 can move or rotate the rolled conductor 23A in the adjustment unit 39 in a direction that reduces the measured pitch angle θ, yaw angle δ, and roll angle γ.

[0048] This reduces friction at the interface between the rectangular wire drawing die 31 and the rolled conductor 23A. When friction is low, wear of the rolled conductor 23A by the rectangular wire drawing die 31 can be suppressed, and the amount of copper powder generated is reduced. When the amount of copper powder generated is reduced, the amount of copper powder adhering to the surface of the conductor 23 is reduced. When the amount of copper powder adhering to the surface of the conductor 23 is low, microbubbles are less likely to form in the coating when paint is applied to the surface of the conductor 23. When microbubbles are less likely to form in the coating, microbubbles are less likely to form when the enamel coating is fired, and appearance abnormalities are less likely to occur in the enamel coating.

[0049] (1B) The wire entry angle expansion suppression device 33 measures the position y at a first measurement position that is located upstream US of the flat wire drawing die 31 and is a first distance x1 away from the flat wire drawing die 31. The wire entry angle expansion suppression device 33 then calculates the pitch angle θ based on the position y and the first distance x1. This allows the pitch angle θ to be measured more accurately.

[0050] The wire entry angle expansion suppression device 33 measures the position z at a second measurement position that is located upstream US of the flat wire drawing die 31 and is a second distance x2 from the flat wire drawing die 31. The wire entry angle expansion suppression device 33 then calculates the yaw angle δ based on the position z and the second distance x2. This allows the yaw angle δ to be measured more accurately.

[0051] (1C) The entrance angle divergence suppression device 33 detects the position y using the first measurement unit 43. This allows for more accurate detection of the position y. The entrance angle divergence suppression device 33 also detects the position z using the second measurement unit 45. This allows for more accurate detection of the position z.

[0052] (1D) The entrance angle divergence suppression device 33 measures the apparent thickness W of the rolled conductor 23A as viewed from a direction perpendicular to the running direction TR, and calculates the roll angle γ from the apparent thickness W. This makes it possible to more accurately calculate the roll angle γ.

[0053] (1E) The entrance angle divergence suppression device 33 calculates the apparent thickness W using the first measurement unit 43. Therefore, the apparent thickness W can be calculated more accurately. <Other embodiments> Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above-described embodiments and can be implemented in various modified forms.

[0054] (1) The entrance angle divergence suppression device 33 does not need to include the control unit 41. For example, an operator can instruct the adjustment unit 39 to move or rotate in accordance with the measured values ​​of the pitch angle θ, the roll angle γ, and the yaw angle δ.

[0055] (2) The conductor 23 entering the rectangular wire drawing die 31 may be a rectangular conductor 23B. In this case, the same effect can be achieved. (3) The device for measuring the pitch angle θ and the device for measuring the roll angle γ may be separate devices.

[0056] (4) The device for measuring some or all of the pitch angle θ, roll angle γ, and yaw angle δ may be a device different from the first measuring unit 43 and the second measuring unit 45. For example, a laser displacement meter may be used to measure some or all of the pitch angle θ, roll angle γ, and yaw angle δ.

[0057] (5) The function of one component in each of the above embodiments may be shared among multiple components, or the functions of multiple components may be performed by one component. Also, part of the configuration of each of the above embodiments may be omitted. Furthermore, at least part of the configuration of each of the above embodiments may be added to or substituted for the configuration of another of the above embodiments.

[0058] (6) In addition to the above-described wire entry angle expansion suppression device 33, the present disclosure can also be realized in various forms, such as a flat enameled wire manufacturing device, a flat enameled wire manufacturing method, and a conductor wire entry angle adjustment method. [Explanation of symbols]

[0059] 1...Enameled wire manufacturing equipment, 3...Bobbin, 5...Round wire drawing machine, 7...Flat wire rolling machine, 9...Annealing furnace, 11...Flat wire drawing machine, 13...Annealing furnace, 15...Paint application machine, 17...Baking furnace, 19...Winding machine, 23...Conductor, 23A...Rolled conductor, 23B...Flat conductor, 24A, 24B...Side, 25...Enameled wire, 26A, 26B...End face, 28...Perpendicular wire, 30...Parallel wire, 31...Flat wire drawing die , 33...Incoming line angle expansion suppression device, 34...Diagonal line, 35...Processing hole, 37...Measuring unit, 39...Adjusting unit, 41...Control unit, 43...First measuring unit, 45...Second measuring unit, 51...First irradiating unit, 53...First light receiving unit, 55...First detecting unit, 57...Parallel light, 59...Shadow, 61...Second irradiating unit, 63...Second light receiving unit, 65...Second detecting unit, 67...Parallel light, 69...Shadow, 71...Roller

Claims

1. In an enameled wire manufacturing apparatus having a mechanism for passing a rolled conductor or a flat conductor through a flat wire drawing die, a measuring unit configured to measure a pitch angle, a yaw angle, and a roll angle of the rolled conductor or the flat conductor relative to the flat wire drawing die; an adjustment unit configured to move or rotate the rolled conductor or the flat rectangular conductor in a direction that decreases the pitch angle, the yaw angle, and the roll angle measured by the measurement unit in a direction upstream of the flat rectangular wire drawing die; An entrance angle expansion suppression device equipped with:

2. The incoming angle divergence suppression device according to claim 1, the measuring unit is configured to measure a vertical position of the rolled conductor or the flat rectangular conductor at a first measurement position that is located upstream of the flat rectangular wire drawing die and that is a first distance from the flat rectangular wire drawing die, and to calculate the pitch angle based on the vertical position and the first distance; The measurement unit is configured to measure the horizontal position of the rolled conductor or the flat conductor at a second measurement position that is located upstream of the flat wire drawing die and is a second distance from the flat wire drawing die, and to calculate the yaw angle based on the horizontal position and the second distance. Device for suppressing the expansion of the entrance angle.

3. The incoming angle divergence suppression device according to claim 2, The measurement unit a first measurement unit disposed at the first measurement position; a second measurement unit disposed at the second measurement position; Equipped with The first measuring unit a first irradiating unit configured to irradiate parallel light in a horizontal direction; a first light receiving unit disposed between the first irradiating unit and the rolled conductor or the flat rectangular conductor, and configured to receive the parallel light irradiated by the first irradiating unit; a first detection unit configured to detect a position in the up-down direction based on the parallel light received by the first light receiving unit; Equipped with The second measuring unit is a second irradiating unit configured to irradiate parallel light in the vertical direction; a second light receiving unit disposed between the second irradiating unit and the rolled conductor or the flat rectangular conductor, and configured to receive the parallel light irradiated by the second irradiating unit; a second detection unit configured to detect a position in the horizontal direction based on the parallel light received by the second light receiving unit; Equipped with Device for suppressing the expansion of the entrance angle.

4. The incoming angle divergence suppression device according to claim 1, The measuring unit is configured to measure the apparent thickness of the rolled conductor or the flat square conductor as viewed from a direction perpendicular to the running direction of the rolled conductor or the flat square conductor, and calculate the roll angle from the apparent thickness. Device for suppressing the expansion of the entrance angle.

5. The incoming angle divergence suppression device according to claim 4, The measurement unit an irradiation unit configured to irradiate parallel light in a direction perpendicular to the traveling direction; a light receiving unit disposed between the irradiation unit and the rolled conductor or the flat rectangular conductor, and configured to receive the parallel light emitted by the irradiation unit; a detection unit configured to detect the apparent thickness based on the parallel light received by the light receiving unit; Equipped with Device for suppressing the expansion of the entrance angle.

6. A method for manufacturing an enameled wire, comprising a step of passing a rolled conductor or a flat conductor through a flat wire drawing die, Measure the pitch angle, yaw angle, and roll angle of the rolled conductor or the flat rectangular conductor relative to the flat rectangular wire drawing die; The rolled conductor or the flat rectangular conductor is moved or rotated in a direction that decreases the measured pitch angle, yaw angle, and roll angle upstream of the flat rectangular wire drawing die. Manufacturing method of enameled wire.

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