JP4624334B2 - Wire rod, wire manufacturing jig, and wire rod manufacturing method - Google Patents

Description

The present invention relates to a wire used for a coil or the like used for electric and electronic parts , a wire manufacturing jig , and a wire manufacturing method .

  A typical electric motor includes, for example, a cylindrical stator, a columnar rotor disposed inside the stator, and a shaft connected to the rotor. As a stator, there is a stator in which an inner tooth of a stator iron core having an inner tooth shape is formed by winding a winding from the inner side in the radial direction of the stator core.

  FIG. 13 is a schematic perspective view showing a configuration of a conventional stator (see, for example, Patent Document 1). A stator 100 shown in FIG. 13 is a three-phase, eight-pole distributed-stator. The stator 100 includes a stator iron core 110 having a cylindrical shape and 48 teeth (inner teeth) 111 and slots 112. Stator 100 also includes eight U-phase coils 161, V-phase coils 171, and W-phase coils 181. As the wire used as the U-phase coil 161, the V-phase coil 171, and the W-phase coil 181, a wire such as a round wire or a rectangular wire is used.

  In the following description, the stator means a state in which a winding for each coil is disposed in a slot of the stator core. Further, the term “coiled wire” means that the wire is simply wound, and it does not matter whether or not the wire is disposed in the slot of the stator core.

  A case where a conventional rectangular wire having a constant width is used as the winding used as the U-phase coil 161, the V-phase coil 171, and the W-phase coil 181 will be described. FIG. 14 is a partially enlarged view of a PP cross section obtained by cutting the stator 100 shown in FIG. 13 along a plane perpendicular to the central axis 110X. In FIG. 14, it is assumed that the winding wire 150 used as the U-phase coil 161 is disposed in the slot 112a.

  In the winding wire 150 arranged in the slot 112a, the rectangular wire constituting the winding wire 150 is arranged in the stator core 110 so that the width direction of the flat wire is substantially parallel to the bottom surface 114a of the slot 112a. They are laminated in the direction from the outermost peripheral side (bottom surface 114 side) to the innermost peripheral side (center axis 110X side).

  14 is formed so as to extend toward the central axis 110X along the radial direction of the stator core 110. The inner teeth 111 shown in FIG. Accordingly, the width r of the slot 112a continuously decreases from the outermost peripheral side to the innermost peripheral side of the slot 112a. That is, the width r of the slot 112a becomes the minimum value r1 on the innermost periphery side of the slot 112a and becomes the maximum value r2 on the outermost periphery side.

For this reason, as described above, in order to make it possible to arrange the winding wire in which conventional rectangular wires having a constant width are stacked in the slot 112 as the U-phase coil 161, the V-phase coil 171, and the W-phase coil 181. The width of the conventional rectangular wire is limited by the minimum width of the slot 112.
JP 2004-194435 A

  However, as described above, in the case where the winding using the conventional rectangular wire having a constant width is arranged on the stator core 110, the difference between the width of the slot 112a and the width of the winding 150 is shown in FIG. The gap S generated by the above becomes larger as it is closer to the outermost peripheral side of the slot 112a. As described above, when a winding wire using a conventional rectangular wire having a constant width is disposed on the stator core 110, the space in the slot 112 cannot be effectively used, and the space factor of the coil is deteriorated.

In view of the above-described conventional problems, an object of the present invention is to provide a wire , a wire manufacturing jig , and a wire manufacturing method capable of improving the space factor of the coil.

In order to solve the above problems, the first aspect of the present invention provides:
The predetermined unit is a wire formed continuously in the longitudinal direction,
The unit part is
One end located at one end of the unit;
The other end located at the other end of the unit,
A plurality of widened portions each having a constant width;
Including a connecting portion located between the widened portions,
Of the widened portions adjacent to each other via the connecting portion, the width of the widened portion on the one end portion side is equal to or greater than the width of the widened portion on the other end portion side, and is adjacent to the one end portion. The width of the widened portion is larger than the width of the widened portion adjacent to the other end,
The unit portion includes a plurality of sets of widened portions in which the widths of the widened portions adjacent to each other through the connecting portion are the same, and the width of the widened portion sets is from the one end side. The other end side is smaller,
Each unit portion has a constant cross-sectional area of a cross section perpendicular to the longitudinal direction,
The cross-sectional shapes of the one end portion, the other end portion, and the connecting portion are wire rods that are the same as the cross-sectional shape of a strand for forming the wire rod.

The second aspect of the present invention
The width of the widened portion adjacent to the one end is substantially the same as the width of the outermost circumferential side of the plurality of slots formed toward the central axis of the cylindrical shape of the substantially cylindrical stator,
In the wire rod according to the first aspect of the present invention, the width of the widened portion adjacent to the other end is substantially the same as the width of the innermost peripheral side of the plurality of slots.

The third aspect of the present invention
The predetermined unit is a wire formed continuously in the longitudinal direction,
The unit part is
One end located at one end of the unit;
The other end located at the other end of the unit,
A plurality of widened portions each having a constant width;
Including a connecting portion located between the widened portions,
Of the widened portions adjacent to each other via the connecting portion, the width of the widened portion on the one end portion side is equal to or greater than the width of the widened portion on the other end portion side, and is adjacent to the one end portion. The width of the widened portion is larger than the width of the widened portion adjacent to the other end,
Each unit portion has a constant cross-sectional area of a cross section perpendicular to the longitudinal direction,
The cross-sectional shape of the one end portion, the other end portion, and the connecting portion is the same as the cross-sectional shape of a strand for forming the wire,
A production jig having a first die and a second die for pressing a wire for producing a predetermined shape,
At least one of the first mold and the second mold includes a unit groove for forming the unit portion,
The unit groove is
One end groove for forming the one end, located at one end of the unit groove;
The other end groove for forming the other end, located at the other end of the unit groove;
A plurality of widening grooves for forming each of the plurality of widened portions;
A connecting groove for forming the connecting portion, located between the widened grooves,
Of the widening grooves adjacent to each other via the connecting groove, the width of the widening groove on the one end groove side is equal to or greater than the width of the widening groove on the other end groove side, and the adjacent one end groove The width of the widening groove is larger than the width of the widening groove adjacent to the other end groove,
The width and depth of the one end groove, the other end groove, and the connecting groove are larger than the width and thickness of the strands for forming the wire,
Of the spaces formed along the unit groove when the first mold and the second mold are combined, the cross-sectional area of the space corresponding to the plurality of widening grooves is orthogonal to the longitudinal direction of the strands. This is a wire rod manufacturing jig that is substantially the same as the cross-sectional area of the cross section.
The fourth aspect of the present invention is
Third with manufacturing jig of the wire of the present invention, the third method for manufacturing a wire for producing a wire rod of the present invention,
The first mold and the second mold are arranged so that a gap is generated between the first mold and the second mold, and an unprocessed portion of the strand for forming the wire is along the unit groove. Supplying the step and
The first mold and the second mold are brought into close contact with each other, and the supplied strand is press-molded.
It is a manufacturing method of a wire which repeats each said step.

According to the present invention, it is possible to provide wire capable of improving the space factor of the coil, producing jig wires, and a manufacturing method of the wire.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  In the following description, the “cross-sectional area” and “cross-sectional shape” of the wire and the components constituting the wire are the cross-sectional area of the wire and the components constituting the wire in the plane orthogonal to the longitudinal direction of the wire. It shall mean a cross-sectional shape.

  FIG. 1 is a schematic plan view of a unit portion constituting a wire according to an embodiment of the present invention. In the drawings shown below, in order to explain the configuration of the unit portion, the outer shape or size of a widened portion and a connecting portion, which will be described later, is schematically shown. Accordingly, the drawings shown below do not directly reflect the outer shape of the widened portion and the connecting portion, which will be described later, or the size ratio.

  A wire rod 10 shown in FIG. 1 is a wire rod in which unit portions 11 having a predetermined configuration to be described later are continuously formed in the longitudinal direction of the wire rod 10. The unit portion 11 is adjacent to the unit portion 11 (not shown) on the left side of the unit portion 11 in FIG. 1 and the one end portion 12 positioned between the illustrated unit portion 11 and the right side of the unit portion 11 in FIG. The other end portion 13 located between the unit portion 11 (not shown) and the illustrated unit portion 11, a plurality of widened portions 14 each having a constant width, and a plurality of widened portions 14 located between the widened portions 14. The connecting portion 15 and the boundary portion 16 are provided.

  The unit part 11 is an example of the unit part of the present invention, the one end part 12 is an example of one end part of the present invention, and the other end part 13 is an example of the other end part of the present invention. The portion 14 is an example of the widened portion of the present invention, and the connecting portion 15 is an example of the connecting portion of the present invention.

As shown in FIG. 1, the widened portion 14 adjacent to one end portion 12 and widened portion 14 _1. Hereinafter, as the processing proceeds to the right side in FIG. 1, the widening portion 14 is denoted by the widening portion 14 ₂ , the widening portion 14 ₃ ,. The widened portion 14 adjacent to the other end portion 13 is defined as a widened portion 14 _n (n is a natural number of 2 or more).

Further, the connecting portion 15 located between the widened part 14 ₁ and 14 _2, and the connecting portion 15 _1. Hereinafter, as the process proceeds to the right side in FIG. 1, the connection part 15 is denoted by reference numerals as a connection part 15 ₂ , a connection part 15 ₃ ,. The connecting portion 15 located on the rightmost side in FIG. 1 becomes a connecting portion 15 _n-1 located between the widened portions 14 _n-1 and 14 _n .

  The cross-sectional area of the unit part 11 is constant. That is, the cross-sectional area of the unit portion 11 is constant regardless of the positions of the one end portion 12, the other end portion 13, the widened portion 14, and the connecting portion 15.

  The one end portion 12 and the other end portion 13 correspond to both ends of the unit portion 11. Moreover, when the wire 10 is cut | disconnected for every unit part 11, the one end part 12 and the other end part 13 become a connection part for connecting with another winding or another electric component, an electronic component, etc.

The length in the longitudinal direction of the widened portion 14 is the same. However, each widened portion 14 has a certain width according to the position in the unit portion 11. For example, as shown in FIG. 1, the width a widened portion 14 ₂ of the width of the widened portion 14 ₁ are the same, the width of the widening section 14 _3, less than the width of the widened portion 14 _2. Details of the change in the width of the widened portion 14 will be described later.

  As described above, the connecting portion 15 is located between the widened portions 14. Moreover, in FIG. 1, the length of the longitudinal direction of each connection part 15 is shown making it the same. However, the length of the connecting portion 15 in the longitudinal direction may be different for each connecting portion 15. An example of the change in the length of the connecting portion 15 in the longitudinal direction will be described later.

  The boundary portion 16 connects the one end portion 12, the other end portion 13 or the connecting portion 15, and the widened portion 14, and is in the process of changing from the one end portion 12, the other end portion 13 or the connecting portion 15 to the widened portion 14. Think of it as an area.

  Next, the cross-sectional shape of the unit portion 11 will be described with reference to FIG.

FIG. 2 is a cross-sectional view of each component of the unit 11 shown in FIG. 2 (a) is one end portion 12 A-A sectional view of FIG. 2 (b), B-B cross-sectional view of the widening section 14 _1, FIG. 2 (c), the joint portion 15 ₁ C-C sectional view, FIG. 2 (d), D-D cross section of the widening section 14 _3, and FIG. 2 (e), the E-E cross section of the widening section _{14 n-1,} FIG. 2 (f) and the other end 6 is a cross-sectional view of the portion 13 taken along line FF. FIG.

  As shown in FIGS. 2A and 2F, the cross-sectional shapes of the one end portion 12 and the other end portion 13 are the same circle. Moreover, it is good also considering the cross-sectional shape of the one end part 12 and the other end part 13 as the cross-sectional shape of the strand for manufacturing the wire 10, so that it may mention later.

As shown in FIGS. 2B, 2D, and 2E, the cross _- sectional shapes of the widened portions 14 ₁ , 14 _3, and 14 _n-1 are rectangular. However, since the cross-sectional area of the unit portion 11 is constant, the widened portion 14 has a thickness corresponding to the width of each of the widened portions 14 as shown in FIGS. 2 (b), 2 (d), and (e).

As shown in FIG. 2 (c), the cross-sectional shape connecting section 15 _1, the same circular one end portion 12 and the other end portion 13. In FIG. 2 (c), the illustrated only in the cross-sectional shape of the connecting portion 15 _1, but each of the cross-sectional shape of the connecting portion 15 are the same. However, FIG. 2C does not prevent the cross-sectional shapes of the connecting portions 15 from being different.

  Next, changes in the width of each widened portion 14 will be described with reference to FIG. FIG. 3 is a schematic top view of the wire 10 for explaining the change in the width of the widened portion 14.

The widened portion 14 shown in FIG. 3 is arranged in the order of the widened portions 14 _{k to} 14 _{k + 4} from the left side to the right side in FIG. 3. As shown in FIG. 3, the widened portions 14 _k and 14 _{k + 1} constitute a widened portion set 20. The widened portions 14 _{k + 2} and 14 _{k + 3} constitute a widened portion set 30. Further, the widened portion 14 _{k + 4} constitutes a set of a widened portion and a widened portion 14 _{k + 5} (not shown) adjacent to the right side. Accordingly, the number of widened portions 14 included in the unit portion 11 is an even number.

In the widened portion set 20, the widened portions _14k and _{14k + 1} have the same width w1. In the widened portion set 30, the widened portions _{14k + 2} and _{14k + 3} have the same width w2. Thus, the widths of the two widened portions constituting the set of widened portions are the same.

However, as shown in FIG. 3, the widths of the widened portions 14 _k and 14 _{k + 1} of the widened portion set 20 are larger than the widths of the widened portions 14 _{k + 2} and 14 _{k + 3} of the widened portion set 30. Further, the widths of the widened portions 14 _{k + 2} and 14 _{k + 3} of the widened portion set 30 are larger than the width of the widened portion 14 _{k + 4} . Thus, the width of the widened portion 14 decreases for each set of widened portions as it proceeds to the right side in FIG.

In the unit portion 11 shown in FIG. 1, the widened portions 14 ₁ and 14 ₂ and the widened portions 14 _n−1 and 14 _n constitute a set of widened portions, respectively. In the unit 11 shown in FIG. 1, for a set of wider section is more than one set, the width of the widening section 14 ₁ is larger than the width of the widening section 14 _n.

  Below, an example of the manufacturing method of the wire 10 of this Embodiment and the manufacturing jig of this invention used for the manufacture is demonstrated.

  FIG. 4 is a schematic perspective view of a mold 40 used when press-molding a strand for forming the wire 10. The mold 40 has a rectangular parallelepiped shape, and includes an upper mold 40a having a flat lower surface and a lower mold 40b provided with a unit groove 41 for forming one unit portion 11 on the upper surface.

  The upper die 40a is movable in a direction perpendicular to the contact surface between the upper die 40a and the lower die 40b. The lower mold 40b is fixed. A unit groove 41 is formed on the upper surface of the lower mold 40b in parallel with the insertion direction of the element wire 200 (longitudinal direction of the mold 40). No unit groove is formed in the upper mold 40a.

  Next, the unit groove 41 will be described with reference to FIG. FIG. 5 is a schematic top view of the lower mold 40b. In the following description, it is assumed that a round wire is used as the element wire 200.

  As shown in FIG. 5, the unit groove 41 includes one end groove 42 for forming the one end portion 12, another end groove 43 for forming the other end portion 13, and a plurality of widths for forming the widened portion 14. The wide groove 44, the connecting groove 45 for forming the connecting portion 15, and the boundary groove 46 for forming the boundary portion 16 are configured.

  The upper mold 40a is an example of the first mold of the present invention, the lower mold 40b is an example of the second mold of the present invention, the unit groove 41 is an example of the unit groove of the present invention, and the one-end groove 42 is an example of one end groove of the present invention, the other end groove 43 is an example of the other end groove of the present invention, the widened groove 44 is an example of the widened groove of the present invention, and the connecting groove 45 is It is an example of the connecting groove of the present invention.

  The one-end groove 42 is formed at the left end of the unit groove 41, that is, the left end of the lower mold 40b. The other end groove 43 is formed at the right end of the unit groove 41, that is, at the right end of the lower mold 40b.

As shown in FIG. 5, the wide groove section 44 adjacent to one end groove 42 and the wide groove 44 _1. Hereinafter, as the process proceeds to the right side in FIG. 5, the widening groove 44 is labeled with a widening groove 44 ₂ , a widening groove 44 ₃ ,. The widening groove 44 adjacent to the other end groove 43 is referred to as a widening groove 44 _n .

Further, the connecting groove 45, the connecting groove 45 which is located between the wide grooves 44 ₁ and 44 _2, and connecting grooves 45 _1. Hereinafter, as proceeding to the right side in FIG. 5, reference numerals such as a connecting groove 45 ₂ , a connecting groove 45 ₃ ,. The connecting groove 45 located on the rightmost side in FIG. 5 becomes a connecting groove 45 _n-1 located between the widened grooves 44 _n-1 and 44 _n .

Next, the cross-sectional shape of the unit groove 41 will be described. FIG. 6 is a cross-sectional view of each groove constituting the unit groove 41. 6 (a) is, G-G cross-sectional view of one end groove 42, FIG. 6 (b), H-H cross-sectional view of the widening groove 44 _1, FIG. 6 (c), connecting grooves 45 ₁ I-I sectional view shown in FIG. 6 (d), the J-J cross-sectional view of the widening groove 44 _3, FIG. 6 (e), the K-K cross-sectional view of the widening groove 44 _n, FIG. 6 (f) the other end a groove 43 It is LL sectional drawing of.

  As shown in FIGS. 6A and 6F, the one end groove 42 and the other end groove 43 have the same substantially U-shaped cross-sectional shape. The one end groove 42 and the other end groove 43 are formed in such a size that the cross-sectional shape of the strand 200 is not changed when the upper die 40a and the lower die 40b are brought into close contact with each other. That is, the width and depth of the one end groove 42 and the other end groove 43 are larger than the width and thickness (diameter) of the strand 200.

  In FIG. 6, in order to show that the width and depth of the one-end groove 42, the other-end groove 43, and the connecting groove 45 are larger than the width and thickness of the strand 200, the size of each groove is shown. Exaggerated. However, in practice, the width and depth of the one-end groove 42, the other-end groove 43, and the connecting groove 45 have sizes corresponding to the width and thickness of the strand 200.

As shown in FIGS. 6B, 6D, and 6E, the widening grooves 44 ₁ , 44 ₃ and 44 _n are substantially U-shaped cross-sectional grooves, and the widening portions 14 ₁ , 14 ₃ and 14 are formed. It is formed in accordance with each cross-sectional shape of _n . Similarly, the other widened grooves 44 _k are formed in accordance with the cross-sectional shape of the widened portion 14 _k .

As shown in FIG. 6 (c), connecting grooves 45 ₁ is the cross-sectional shape of the groove of substantially U-shape. Width and depth of the connecting groove 45 _1, similar to the one end groove 42 and the other end groove 43 is greater than the width and thickness of the strand 200. The same applies to the other connecting grooves 45.

In the boundary groove 46, one end groove 42, the other end a groove 43 or connecting groove 45, to connect smoothly the wide groove 44 _k, the cross-sectional shape gradually changes.

  Next, the manufacturing method of the wire 10 using the metal mold | die 40 is demonstrated.

  First, the upper mold 40a and the lower mold 40b are arranged in parallel at positions where they do not contact each other. Then, the strand 200 having a circular cross-sectional shape is supplied between the upper mold 40 a and the lower mold 40 b in parallel with the longitudinal direction of the mold 40, and the strand 200 is arranged along the unit groove 41.

Thereafter, the upper die 40a is moved, the lower surface of the upper die 40a is brought into close contact with the upper surface of the lower die 40b where the unit groove 41 is formed, and the element wire 200 is press-molded. Thereby, the pressed part of the strand 200 becomes one unit part 11. At this time, since the width and height of the space formed by the one end groove 42, the other end groove 43, the connecting groove 45 and the upper mold 40 a are larger than the width and thickness of the strand 200, the one end groove 42 and the other end groove 43. And the cross-sectional shape of the strand 200 in the position corresponding to the connecting groove 45 is not deformed. Accordingly, the cross-sectional shapes of the one end portion 12, the other end portion 13 and the connecting portion 15 formed at this time are the same circle as that of the element wire 200. Further, the cross-sectional area of the space formed by the widened parts 44 _k and the upper mold 40a is substantially the same as the cross-sectional area of the wire 200, the wire 200 at a position corresponding to the widened portion 44 _k, the Only the cross-sectional shape changes. The term “substantially the same” as used herein refers to those within the range that a person skilled in the art can consider to be the same in terms of social wisdom, considering variations during the manufacturing process of the wire 10.

  Thereafter, the upper mold 40a is moved to return the upper mold 40a and the lower mold 40b to the state shown in FIG. Thereafter, the formed unit portion 11 is removed from the unit groove 41. Next, in order to form a new unit portion 11 while winding the press-molded portion with a winder (not shown), the portion of the element wire 200 that is not press-molded is continuously replaced with the upper die 40a and the lower die 40a. Supply between the mold 40b. By repeating these steps, the wire 10 in which the unit portions 11 are repeatedly formed is manufactured.

  Below, the case where the wire 10 is used for the U-phase coil 161 of the stator 100 shown in FIG. 13 is demonstrated as an example of application of the wire 10 of this Embodiment.

  FIG. 7 is a schematic front view of a winding formed from the wire 10 (see FIG. 1) for use as the U-phase coil 161. The wire 122 shown in FIG. 7 is obtained by winding a wire obtained by cutting the wire 10 for each unit portion 11 (hereinafter referred to as “wire for wire”). 7 shows the shape of the widened portion 14 in an exaggerated manner. Therefore, the length and size of the widened portion 14 and the connecting portion 15 in FIG. 7, the ratio of the sizes of the widened portion 14 and the connecting portion 15, the shape of each portion, and the like are shown in the ridgeline 122 shown in FIG. 7. It is not limited.

The winding 122 shown in FIG. 7 has a substantially quadrangular coil shape as a whole. The winding 122 has a slot portion 122a in which the widened portions 14 ₁ , 14 _{3, etc.} are stacked, a slot portion 122b in which the widened portions 14 ₂ , 14 _{4, etc.} are stacked, and the connecting portions 15 ₁ , 15 ₃ , and so on. The bridging part 122c, the bridging part 122d in which the connecting parts 15 ₂ , 15 ₄ ... Are routed, and the winding start part 122e corresponding to the one end part 12 and the other end part 13 of the unit part 11 (see FIG. 1), respectively. And the end portion 122f.

  Next, a state where the winding wire 122 is arranged on the stator core 110 will be described with reference to FIGS. 8 and 9. FIG. 8 is a perspective view schematically showing a state in which the winding wire 122 is disposed on the stator core 110 as the U-phase coil 161 (see FIG. 13). In addition, in the stator core 110 shown in FIG. 8, the display of components other than the slots 112a and 112b is omitted. As shown in FIG. 8, the slot portions 122a and 122b of the winding wire 122 are disposed in the slots 112a and 112b, respectively. In addition, as shown in FIG. 8, the length in the longitudinal direction of the widened portion 14 corresponds to the height h of the stator core 110.

FIG. 9 is a partially enlarged view of a PP cross section obtained by cutting the stator core 110 along a plane perpendicular to the direction of the central axis 110X (see FIG. 13). As shown in FIG. 9, the widened portion 14 ₁ and 14 ₉ are respectively disposed on the outermost side and the innermost side of the slot 112a, the width of the widened portion ₁₄ 1-14 _9, the width r of the slot 112a Responds to change. Thus, while the gap S between the winding 150 and the slot 112a shown in FIG. 14 spreads closer to the outermost periphery side, the gap _S 1 between the slot portion 122a and the slot 112a shown in FIG. _9, S _{3, S} 5, In S ₇ and S ₉ , no expansion like the gap S occurs.

  9 is compared with the state shown in FIG. 9 when the state in which the wire 150 using the conventional rectangular wire having a constant width is arranged in the slot 112a (see FIG. 14) is compared with the state shown in FIG. The surplus space of the slot 112a is smaller than the state. That is, the space factor of the U-phase coil 161 using the winding wire 122 is higher than that of the U-phase coil 161 using the winding wire 150 using a rectangular wire having a constant width. The same applies to the slot portion 122b arranged in the slot 112b.

Incidentally, the width of the widened portion 14 ₁ and 14 _2, the outermost side of the width of the slot 112a and 112b are substantially the same, respectively. Also, the width of the widening section 14 ₉ and _{14 10,} the innermost of the width of the slot 112a and 112b are substantially the same, respectively. Here, “substantially the same” is shown in FIG. 9 between the widened portions 14 _{1 to} 14 ₉ and the slot 112a in consideration of, for example, variations in the manufacturing process of the wire 10. Such a variation that allows the presence of the minimum gaps S _{1 to} S ₉ to enable the widening portion 14 to be disposed in the slot 112a is included, and within a range that a person skilled in the art can regard as the same in terms of social wisdom Means things.

Next, the state of the crossing part 122c will be described with reference to FIG. In the bridging portion 122c, the connecting portion 15 located farther from the slot portions 122a and 122b has a longer distance to be routed. For this reason, the connecting portion 15 becomes longer in the order of the connecting portions 15 ₁ , 15 ₃ . The same applies to the cross section 122d. That is, in the unit portion 11 (see FIG. 1), the connecting portion 15 on the other end 13 side is longer than the connecting portion 15 on the one end 12 side.

  Note that the connecting portion 15 on the other end 13 side is shorter than the connecting portion 15 on the one end portion 12 side depending on the shape of the crossing portions 122c and 122d. In addition, when the height of the crossing portions 122c and 122d (the vertical direction in FIG. 7) is limited and the widened portion 14 is stacked, the connecting portion 15 is connected to the inside of the crossing portions 122c and 122d in FIG. Need to be arranged and routed on the front side) or outside (the back side in FIG. 7). In this case, the pattern of change in the length of the connecting portion 15 appears repeatedly in the unit portion 11.

  Next, a method for arranging the slot portion 122a in the slot 112a will be described with reference to FIG. The same description can be applied to the slot portion 122b.

  FIG. 10A is a diagram showing the relationship between the width of the slot portion 122a and the width of the slot 112a, and FIG. 10B shows the shape of the slot portion 122a when the slot portion 122a is arranged in the slot 112a. FIG. FIG. 10 is a partially enlarged view of a PP cross section obtained by cutting the stator core 110 along a plane perpendicular to the direction of the central axis 110X (see FIG. 13).

  The slot portion 122a shown in FIG. 10A is in a state in which the widened portion 14 is symmetric with respect to a plane passing through the line NN and perpendicular to the paper surface. Since the width W of the slot portion 122a is larger than the minimum value r1 of the width r of the slot 112a, the slot portion 122a cannot be placed in the slot 112a as it is.

  Therefore, by shifting the widened portion 14 forming the slot portion 122a in the direction of arrow R, the slot portion 122a has a stepped shape as shown in FIG. At this time, the distance shifted in the direction of the arrow R becomes larger as the widened portion 14 on the upper side of FIG. Then, as shown in FIG. 10B, the slot portion 122a having a stepped shape is inclined with respect to the bottom surface 114a. As a result, the width W ′ of the slot portion 122a is smaller than the minimum value r1 of the width r of the slot 112a, so that the slot portion 122a can be inserted into the slot 112a. Finally, the slot part 122a is returned to the state shown in FIG. 10A, and the arrangement in the slot 112a is completed.

  In addition, although the case where the slot portion 122a in which the widened portions 14 are in close contact with each other is described as an example in the slot 112a, the thickness of the connecting portion 15 is actually larger than the thickness of the widened portion 14; In the slot portion 122a of the rolled wire 122, there is a gap between the stacked widened portions 14. In order to eliminate this gap, the widened portion 14 is pressed over the range of the height h of the stator core 110 from the direction of the arrow Q in FIG. As a result, the widened portions 14 can be brought into close contact with each other as shown in FIG. Alternatively, the widened portions 14 may be brought into close contact with each other by alternately shifting the positions in the width direction of the connecting portions 15 adjacent to the widened portion 14 shown in FIG.

  Up to this point, as an application example of the wire 10, the case where the U-phase coil 161 using the wire for wire is arranged on the stator core 110 has been described. However, the V-phase coil 171 or the W-phase coil 181 using the wire for wire. In the case where (see FIG. 13) is formed, the description related to the slot portion 122a can be similarly applied. However, since the shapes of the crossing portions of the U-phase coil 161, the V-phase coil 171 and the W-phase coil 181 are different, the length of the connecting portion 15 varies depending on the shape of the crossing portion of each coil.

In the above-described embodiment, the width of the widened portion 14 has been described as decreasing for each set of widened portions. However, the present invention is not limited to this. For example, in the adjacent widened portions 14, the other end 13. The width of the widened portion on the side may be smaller than the width of the widened portion on the one end portion 12 side. FIG. 11 is a view showing a modification of the wire 10 (see FIG. 1). In the case of the wire 10 shown in FIG. 11, if the widths of the widened portions 14 _{1 to} 14 ₃ are w1, w2, and w3, respectively, w1>w2> w3. Thus, the width of the widened portion 14 may be decreased for each widened portion 14.

Moreover, in the said embodiment, although the group of the wide part was demonstrated as what is comprised by two wide parts, it is not restricted to this, For example, the group of wide parts is comprised by two or more wide parts. Also good. FIG. 12 is a view showing a modification of the wire 10 (see FIG. 1). In FIG. 12, the three widened portions 14 _{1 to} 14 _{3 form} a widened portion set 35 and have the same width.

Moreover, in the said embodiment, although the width | variety of the wide part 14 demonstrated as what reduces for every group of wide parts, it is not restricted to this, The change of the width | variety of the wide part 14 changes FIG. 11 and FIG. It may be a combination. For example, the widened portions 14 _{1 to} 14 _k having the same width constitute a set of widened portions, and in the widened portions adjacent to the widened portions 14 _{k + 1 to} 14 _n , the widened portion 14 on the other end 13 side. Is less than the width of the widened portion 14 on the one end 12 side. That is, in the adjacent widened portions 14 of the wire 10 (see FIG. 1), the width of the widened portion 14 on the one end 12 side is equal to or greater than the width of the widened portion 14 on the other end 13 side, and the widened portion 14. ₁ width may be greater than the width of the widening section 14 _n.

  Moreover, in the said embodiment, although the width | variety and depth of the one end groove | channel 42, the other end groove | channel 43, and the connecting groove 45 were each demonstrated as what is larger than the width | variety and thickness of the strand 200, it is not restricted to this, For example, The width or depth of the one end groove 42, the other end groove 43, and the connecting groove 45 may be smaller than the width and thickness of the element wire 200, respectively. In this case, the cross-sectional shapes of the one end portion 12, the other end portion 13, and the connecting portion 15 are formed in accordance with the cross-sectional shapes of the one end groove 42, the other end groove 43, and the connecting groove 45.

  Moreover, in the said embodiment, although demonstrated that the unit groove | channel 41 was formed only in the lower mold | type 40b, it is not restricted to this, For example, the unit groove | channel may be formed in the upper mold | type 40a. Further, unit grooves may be formed in both the upper die 40a and the lower die 40b. In this case, when the lower surface of the upper die 40a and the upper surface of the lower die 40b are brought into close contact with each other, the width of the space formed by the one end groove, the other end groove, and the connecting groove of the upper die 40a and the lower die 40b, and The height should be larger than the width and thickness of the strand 200. Moreover, the cross-sectional area and cross-sectional shape of the space formed by the widening grooves of the upper die 40a and the lower die 40b only need to correspond to the cross-sectional area and cross-sectional shape of the widened portion 14.

Moreover, in the said embodiment, although demonstrated as what the unit groove | channel 41 was formed only in the lower mold | type 40b, for example, one of the upper mold | type 40a or the lower mold | type 40b is a convex type, and the other is A concave shape that fits into this convex shape may be used. In this case, when the upper mold 40a and the lower mold 40b are brought into close contact with each other, the width and height of the space formed by the convex mold and the concave mold corresponding to the portions where the one end portion 12, the other end portion 13 and the connecting portion 15 are formed. Is larger than the width and thickness of the strand 200. The width and height of the space formed by the convex and concave corresponding to the part forming the widened part 14 _k is, it is sufficient to correspond to the cross-sectional area and cross-sectional shape of the widening section 14 _k.

  Moreover, in the said embodiment, although demonstrated as what uses a round wire as the strand 200, it is not restricted to this, For example, you may use a flat wire as the strand 200. FIG. In this case, the cross-sectional shapes of the one end portion 12, the other end portion 13 and the connecting portion 15 are rectangular.

  In addition, in the said embodiment, although the number of the wide part 14 of the wire for wire forming the wire 122 is demonstrated as ten, it is not restricted to this, The number of the wide part of the wire for wire is even. If it is.

  Moreover, in the said embodiment, although the stator core 110 demonstrated as what was cylindrical shape, it is not restricted to this, For example, the outer diameter of the stator core 110 is a polygon for inserting a rotor in a center axis direction. The shape may also be Even in this case, the above description can be applied.

Production method of the present wire according to the invention, the wire manufacturing jig, and the wire is wire capable of improving the space factor of the coil, and it is possible to provide a manufacturing jig wire, used in electrical and electronic components It is useful as a wire used for a coil to be used, a wire manufacturing jig , a wire manufacturing method, and the like.

The top view of the unit part 11 which comprises the wire 10 which concerns on one embodiment of this invention. (A) of the wire 10 according to an embodiment of the present invention, A-A sectional view of one end portion 12, (b) widened portion 14 ₁ of the sectional view taken along line B-B, (c) joint portions 15 ₁ of the C- C cross-sectional view, (d) D-D cross-sectional view of the widening section _{14 3, (e) E-} E sectional view of the widening section _{14 n-1, F-F} sectional view of (f) and the other end portion 13 Typical top view which shows the change of the width | variety of each wide part 14 of the wire 10 which concerns on one embodiment of this invention. The typical perspective view of metallic mold 40 concerning one embodiment of the present invention. Schematic top view of lower mold 40b of mold 40 according to an embodiment of the present invention Mold 40 according to the embodiment of (a) the present invention, G-G cross-sectional view of one end groove 42, (b) H-H cross-sectional view of the widening groove 44 _1, (c) connecting the groove 45 of _the I -I sectional view, (d) J-J cross-sectional view of the widening groove _{44 3, (e) K-} K cross-sectional view of the widening groove _{44 n, (f) L-} L sectional view of the other end groove 43 The typical perspective view of the winding wire | line 122 which is one example of application of this invention The perspective view which shows the state which has arrange | positioned the winding wire 122 which is one application example of this invention in the stator core 110 The figure which shows the state by which the slot part 122a of the winding 122 which is one application example of this invention is arrange | positioned at the slot 112a (A) The figure which shows the relationship between the width | variety of the slot part 122a of the winding wire | line 122 which is one application example of this invention, and the width | variety of the slot 112a, (b) The shape of the slot part 122a at the time of inserting in the slot 112 is shown Figure Typical top view which shows one modification of the wire 10 which concerns on one Embodiment of this invention. Typical top view which shows one modification of the wire 10 which concerns on one Embodiment of this invention. Schematic perspective view of a conventional stator 100 Partial enlarged view of the PP cross section of the stator core 110 in the conventional stator 100

Explanation of symbols

10 wire material 11 units 12 one end 13 other end _{14,14 1, 14 2, 14 3} , 14 k, 14 k + 1, 14 k + 2, 14 k + 3, 14 k + 4, 14 n-2, 14 n-1, 14 n Widened portion 15 ₁ , 15 ₂ , 15 _n-2 , 15 _n-1 connecting portion 20, 30, 35 Widened portion set 40 Die 40 a Upper die 40 b Lower die 41 Unit groove 42 One end groove 43 Other end groove 44, 44 ₁ , 44 ₂ , 44 ₃ , 44 _n Widening groove 45, 45 ₁ , 45 ₂ , 45 _n-1 connecting groove 100 Stator 110 Stator core 112, 112 a, 112 b Slot

Claims (4)

The predetermined unit is a wire formed continuously in the longitudinal direction,
The unit part is
One end located at one end of the unit;
The other end located at the other end of the unit,
A plurality of widened portions each having a constant width;
Including a connecting portion located between the widened portions,
Of the widened portions adjacent to each other via the connecting portion, the width of the widened portion on the one end portion side is equal to or greater than the width of the widened portion on the other end portion side, and is adjacent to the one end portion. The width of the widened portion is larger than the width of the widened portion adjacent to the other end,
The unit portion includes a plurality of sets of widened portions in which the widths of the widened portions adjacent to each other through the connecting portion are the same, and the width of the widened portion sets is from the one end side. The other end side is smaller,
Each unit portion has a constant cross-sectional area of a cross section perpendicular to the longitudinal direction,
The cross-sectional shape of the said one end part, the said other end part, and the said connection part is a wire rod which is the same as the cross-sectional shape of the strand for forming the said wire rod. The width of the widened portion adjacent to the one end is substantially the same as the width of the outermost circumferential side of the plurality of slots formed toward the central axis of the cylindrical shape of the substantially cylindrical stator,
2. The wire according to claim 1, wherein a width of the widened portion adjacent to the other end is substantially the same as a width of the innermost peripheral side of the plurality of slots. The predetermined unit is a wire formed continuously in the longitudinal direction,
The unit part is
One end located at one end of the unit;
The other end located at the other end of the unit,
A plurality of widened portions each having a constant width;
Including a connecting portion located between the widened portions,
Of the widened portions adjacent to each other via the connecting portion, the width of the widened portion on the one end portion side is equal to or greater than the width of the widened portion on the other end portion side, and is adjacent to the one end portion. The width of the widened portion is larger than the width of the widened portion adjacent to the other end,
Each unit portion has a constant cross-sectional area of a cross section perpendicular to the longitudinal direction,
The cross-sectional shape of the one end portion, the other end portion, and the connecting portion is the same as the cross-sectional shape of a strand for forming the wire,
A production jig having a first die and a second die for pressing a wire for producing a predetermined shape,
At least one of the first mold and the second mold includes a unit groove for forming the unit portion,
The unit groove is
One end groove for forming the one end, located at one end of the unit groove;
The other end groove for forming the other end, located at the other end of the unit groove;
A plurality of widening grooves for forming each of the plurality of widened portions;
A connecting groove for forming the connecting portion, located between the widened grooves,
Of the widening grooves adjacent to each other via the connecting groove, the width of the widening groove on the one end groove side is equal to or greater than the width of the widening groove on the other end groove side, and the adjacent one end groove The width of the widening groove is larger than the width of the widening groove adjacent to the other end groove,
The width and depth of each of the one end groove, the other end groove, and the connecting groove are larger than the width and thickness of the strands for forming the wire,
Of the spaces formed along the unit groove when the first mold and the second mold are combined, the cross-sectional area of the space corresponding to the plurality of widening grooves is orthogonal to the longitudinal direction of the strands. A wire manufacturing jig that is substantially the same as the cross-sectional area of the cross section. Using the production tool of the wire material according to claim 3, a method of manufacturing a wire for producing a wire according to claim 3,
The first mold and the second mold are arranged so that a gap is generated between the first mold and the second mold, and an unprocessed portion of the strand for forming the wire is along the unit groove. Supplying the step and
The first mold and the second mold are brought into close contact with each other, and the supplied strand is press-molded.
A method for manufacturing a wire, wherein the steps are repeated.