JP3499956B2 - Spiral-wound steel sheet laminated parts - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a general spirally wound component or a laminated component suitable for use as a core of a rotating machine such as a motor or a generator.

[0002]

2. Description of the Related Art In general, many cores and machine parts of rotating machines are made by punching. However, punching has a problem that the yield of the material is low and the cost of the material is high. As a method for manufacturing a core having a relatively high yield, there are a method of manufacturing a spirally wound component by cold rolling a one having a trapezoidal cross section, and a segment method used in a large rotating machine core. (G.NEIDHOEFER AND A.SCHWENG
ELER: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS 9
(1978) 112-122). In this case, although the yield is high, it is troublesome to manufacture and assemble a material having an irregular shape other than a rectangular cross section, which is a problem.

In response to such a problem, spiral winding parts are manufactured by cold-rolling those having a trapezoidal cross section to form spiral winding cooling fins, and an alternator (AC In a generator, a steel plate is spirally wound to form a core.

However, the spirally wound cooling fin needs to have a trapezoidal cross section in advance in consideration of the final shape, and the final design needs to be known from the time of manufacturing the material, which is a problem. . In this case, since the plate having the irregular cross section is cold-rolled, the performance of the final product may be impaired.

Further, in the spiral winding of the alternator, a slit electromagnetic steel plate is punched out in advance at a portion corresponding to the slot portion of the core, and then spirally wound in the plate width direction. Therefore, the plate thickness after the processing is necessarily different from the plate thickness before the processing. For example, if the thickness of the electromagnetic steel sheet as a raw material is constant, the thickness after spiral processing is thicker on the inner diameter side of the spiral winding and thinner on the outer side.
Therefore, the space factor of the electromagnetic steel plate in the core is reduced, and the rotary machine capacity is reduced. In addition, when the space factor is low, the mechanical rigidity of the core is also low, which causes problems of noise and vibration. In an alternator of an automobile, the width of the core back portion is narrow, which is not a serious problem, but it is not applied to general motors and the like due to various problems due to the change in plate thickness described above.

Further, in order to reduce the plate thickness deviation in the plate width direction, an electromagnetic steel plate having different plate thicknesses on both sides, such as a cooling fin, is prepared in advance, and the plate thickness is constant after spiral winding. It is also possible to consider But,
These materials are not common ones, and there is a limit to increase in price and reduction in final thickness deviation.

[0007]

DISCLOSURE OF THE INVENTION The present invention provides a conventional spiral-rolled steel sheet or grain-oriented electrical steel sheet in the case of providing a spiral-wound machine part having a small thickness deviation in the sheet width direction and a spirally-rolled steel sheet for a rotating machine. It was made for use.

[0008]

The gist of the present invention is as follows.
It is as follows. (1) In a laminated component formed by spirally winding a steel sheet without providing a notch for spiral processing, the major crystal plane orientation of the surface of the spirally rolled steel sheet is {011}, and the major direction in the radial direction from the center of the spiral winding. crystal orientation Do is a <100>, sintered
Crystal plane {011} is within 30 degrees to steel plate surface, crystallographic direction
The position <100> is within 30 degrees with respect to the radial direction, the thickness deviation in the width direction is 4% or less , and the space factor when stacking is 95.
% Or more, a spiral wound steel plate laminated part. (2) The laminated component according to (1), wherein the laminated component is sheared for each winding and laminated. (3) Total elongation in the longitudinal direction of the material forming the laminated component: P
(%) And ratio of outer diameter R and inner diameter r of spirally wound steel sheet R /
The laminated component according to (1) or (2), wherein r satisfies the following formula. 1.2 ≦ R / r ≦ (100 + P) / (100−P) (4) Surface treatment is applied to the laminated surface of the spirally wound steel plates.
The laminated component according to (1), (2) or (3) , characterized in that

The present invention will be described in detail below. The parts of the present invention are mechanical spiral parts, are applied to cooling fins and other mechanical parts, and are cores used in general rotating machines, such as motors and generators. The model and structure of the do not matter. This core can be applied to magnetic circuit cores for other applications such as rotary transformers and sensors, if applicable, in addition to motors and generators.

The spirally wound steel sheet of the present invention is 360.
Spiral wound with an angle greater than 1 degree and more than one degree,
Generally, as in Example 1 to be described later, it is formed by bending in the plate width direction, and is one roll of 360 degrees. Except for being spiral wound, it is the same as an integrally punched plate.

The radial direction in spiral winding generally corresponds to a circular shape, but in the present invention,
Included are similar spirally wound plates made by bending, such as ellipses and track-shaped ones.

The spirally wound plate of the present invention can be used as a laminated component.
Oite, primary crystal plane orientation of the spiral wound steel plate surface is the {011} major crystal orientation in the radial direction of the spiral winding is should be <100> crystal plane and crystal orientation, crystal plane {011} is within 30 degrees to the steel plate surface,
<100> crystal orientation within 30 degrees to the radial direction, preferably when it is not an angle within 20 degrees, respectively, other orientations becomes dominant, it is difficult to obtain characteristics that the thickness can be constant. That is, the reason for limiting to within 30 degrees is that the r value (a rate of change in sheet width / a rate of change in sheet thickness in tensile processing or the like can be approximately expressed) becomes very large.
The r value is because the plate thickness hardly changes even when the spiral processing is performed. Here, {011} and <100> are parallel to the steel plate surface.
Mirror indices for various crystal plane orientations and crystal orientations parallel to a specific direction
It is represented by.

The material constituting the spirally wound plate is ordinary steel plate or other mechanical material in the case of mechanical parts, while it is electromagnetic steel plate, pure iron, permalloy, N in the case of magnetic parts.
It goes without saying that it is necessary to use a magnetic material such as i, but any material may be used as long as the present invention can be realized.
However, as a material having a high saturation magnetization, a low iron loss, and an excellent economical efficiency, an electromagnetic steel sheet containing Si, preferably a grain-oriented silicon steel sheet is preferable.

It is preferable that the space factor of the magnetic material in the laminated parts and wound parts made by spiral winding is 95% or more. For example, the space factor of a steel plate such as an electromagnetic steel plate is generally 9
It is about 5% or more, and this value or more is preferable.
Yes. Considering that the space factor is determined because the plate thickness changes between the outer diameter and the inner diameter, the maximum plate thickness t _M between the outer diameter and the inner diameter is considered.
And the average plate thickness t _A , the space factor is 100 t _A / t _M %.
become. On the other hand, in the pull test , pull the material
The rate of change in length in the pulling direction when stretched is defined as elongation p%
Then, when spirally wound, if the outer diameter expands by p% and the inner diameter contracts by p%, the relationship between the ratio R / r of the outer diameter R and the inner diameter r of the spirally wound plate and this p is

[Formula 1] Becomes In conventional processing such as tension (compression) of materials, the shape changes in two directions which are perpendicular to the processing direction, so that the change in plate thickness is 1/2 of the tensile elongation p (compression contraction p). When a material with a constant plate thickness is used, the maximum plate thickness is the plate thickness at the inner diameter, and the average plate thickness is approximately between the outer diameter and the inner diameter, so the space factor is 100 t _A / Since t _M = 100 / (1 + p / 200), in order to obtain a space factor of 95% or more, p <
It will be 10%. Therefore, it is necessary that R / r <1.2. In the present invention, the change in plate thickness is small beyond the conventional limit, and it is necessary that R / r ≧ 1.2.

On the other hand, there is a maximum value P of the mechanical limit of the material forming the spirally wound plate , that is, the limit of the elongation p.
Considering that, with respect to the total elongation P (%) longitudinal direction of the material properties, the ratio R / r of the outer diameter R and the inner diameter r (100
Only + P) / (100-P) or less can be processed. that's all
Therefore, the outer diameter / inner diameter ratio, R / r of the spiral core of the present invention is
Beyond the general limits of conventional spiral cores, 1.2 ≦ R / r
Yes, R / r <(100 + P) due to mechanical limit of material
/ (100-P).

If the finished dimensional accuracy of the spirally wound plate is required, the number of crystal grains in the plate width direction of the material forming the spirally wound plate is preferably 3 or more. If the number is two or less, the dimensional accuracy of the component or core cannot be increased due to uneven work elongation at the grain boundary portion during working.

In the present invention, in the case of a magnetic component, a conventional grain-oriented electrical steel sheet is used to punch or cut a material for forming a spirally wound plate of 360 degrees, that is, one round. After that, the spiral processing for 360 degrees, that is, one round is performed. In advance,
The material to be punched may correspond to a material wider than 360 degrees, or both ends may be cut off so as to form one round of 360 degrees after spiral processing. The wrap angle may be slightly smaller than 360 degrees as long as it does not affect the performance. As in Example 2 which will be described later, the joining portions 18 at the beginning and the end may be joined by general welding such as laser welding, or may be joined by an adhesive or the like. Also, a mechanical fitting may be made at the joining portion to join them.

In this way, the 360 degree 1 made
A spirally wound plate for a circumference is laminated with a conventional punched plate to form a laminated core. In this case, rolling and the like may be performed. Further, a bolt hole may be provided.

The parts in which the spirally wound plates are laminated or wound according to the present invention are mainly used for mechanical parts and magnetic parts. Since the core as a magnetic component in which the spirally wound plates are laminated of the present invention is mainly used in a rotating machine, interlayer resistance between magnetic materials forming the spirally wound core is required. Therefore, it is necessary to perform surface treatment on the surface of the plate that constitutes the spirally wound core. This surface treatment may also have the purpose of rust resistance. The surface treatment may be coating a film or bluing.

[0020]

【Example】

[Embodiment 1] FIG. 1 shows a state in which a grain-oriented electrical steel sheet 1 is used and a spirally wound plate material 4 is cut out at positions 3. The rolling direction is 2, and the strip width direction is 5. FIG. 2 shows a material 4 of a spirally wound plate that has been cut out. A cross section 6 perpendicular to the length direction is shown in FIG. 7 is the plate thickness direction, and 2 is the plate width direction. Such a sample (material) 4 is bent in the plate width direction to form a plate 11 spirally wound for 360 degrees.
A material having a plate thickness deviation of 3% or less was used.

A spiral wound core having a radius ratio R / r of 1.2 (FIG. 4) was processed. In this embodiment, the cylindrical core 11 has no teeth. The change in plate thickness after spiral processing with this core was measured and is shown in Table 1. Although the case of Sample 1 is an example of the present invention, the change in plate thickness was 4% or less, and it was possible to achieve a space factor of 95% or more as a rotating machine core. Sample 2,
In Nos. 3 and 4, the total elongation P in the longitudinal direction of the material was low, so that it could not be processed (Sample 3), there was a partial change in plate thickness, or even if it was good, the change in plate thickness was greater than 5%, With a rotating machine core, the space factor could not exceed 95%. One round of cores made in this way (Fig. 5
(A)) was laminated to form the laminated core of FIG. 5 (b).

[0022]

[Table 1]

[Embodiment 2] The spiral wound core of Embodiment 1 is
The number of turns is greater than one turn to form a spiral wound core. In the final product, the winding start 12 'was press-formed from the top and bottom of the spiral winding to eliminate steps (Fig. 5 (c)).

[Example 3] Samples 1 and 2 were used to form the spiral wound core 14 with teeth 16 shown in Fig. 7 by changing the spiral winding radii r and R. This is a spiral wound plate material 14 rather than the grain-oriented electrical steel plate 1 as shown in FIG.
Punch out, then spirally wind as shown in FIG.
The extra portion 19 was cut off so as to make one lap of 0 degree. The joint portion 18 was joined by laser welding. Finally, these were laminated to form a rotating machine core.

Table 2 shows the results of the plate thickness deviation in the plate width direction of the spirally wound plate which is the material of the laminated core thus produced. The difference between the maximum and minimum values for the average plate thickness is shown. The plate thicknesses of the outer diameter portion and the inner diameter portion of the core back 15 were measured. In the sample 1 of the example of the present invention, the plate thickness of the spirally wound core hardly changed. In other samples, spiral winding is impossible, and the plate thickness deviation in the plate width direction is large.

[0026]

[Table 2]

[0027]

INDUSTRIAL APPLICABILITY According to the present invention, a spirally wound plate having a small plate thickness deviation in the plate width direction is used as a wound part or a part for one round of 360 degrees, which is the same as a conventional punched part or core. As described above, it is wound or laminated to make a machine part or a core for a rotating machine. In the case of machine parts, without considering the final design, it can be processed without deviation in plate thickness in the plate width direction.
Design becomes easy.

In the case of a magnetic component, if a conventional grain-oriented electrical steel sheet or the like is used, a spirally wound steel sheet with a small plate thickness deviation in the plate width direction can be easily formed, so that the volume of the magnetic material in the core is extremely small. Can be provided. When using a plate material whose conventional texture is generally random,
In the spiral wound core, the plate thickness deviation in the plate width direction is large, the space factor of the magnetic material occupying the core is low, and the mechanical rigidity is lowered, so that the problem of noise vibration is likely to occur. As described above, when the main crystal plane orientation of the plane in the spirally wound plate is {011} and the main crystallographic orientation in the radial direction of the spiral winding is <100>, the plate width is easily Since the plate thickness deviation in the direction can be small, the space factor can be easily increased to 95% or more, and there are few problems.

In the present invention, a conventional grain-oriented electrical steel sheet is used to make a spirally wound sheet material for one round continuously,
After that, the spiral processing is performed. This is practical because it is not necessary to arrange <100> in the longitudinal direction of the electromagnetic steel sheet coil as in the case of making a spirally wound core with two or more turns as in the conventional case. This one-turn spirally wound plate can be handled in the same manner as a conventional punched core, and thus the conventional technique can be utilized. In addition, the size restrictions that come from electromagnetic steel sheets are reduced. Conventionally, what can be formed by the plate width is restricted by the following formula: (peripheral length of one-round core) × number of laminated layers ≦ plate width. In the present invention, the grain-oriented electrical steel sheet has a circumferential length of the one-round core ≤ the sheet width, and the applicable range is wide.

A laminated core using this spirally wound plate is
Since it can be used in a rotating machine or the like, when the surface of the spirally wound plate is subjected to a surface treatment, the insulating property can be improved and the current between layers can be suppressed, so that the core iron loss can be reduced. Also, other effects such as rust resistance are great. Since this spiral wound core can be used in a motor or a generator, the effect of the present invention is very large. Recently, compact high-power motors and the like have been required for servo motors, electric vehicles, and the like. These require not only high performance but also mass productivity. In terms of mass productivity, this spiral core used in an alternator or the like used in an automobile is optimal, and in the present invention, the space factor is extremely high in this spiral wound core, so the effect of the invention is very large. .

[Brief description of drawings]

FIG. 1 is a plan view of a grain-oriented electrical steel sheet used in the present invention.

FIG. 2 is a perspective view showing a material of a spirally wound plate obtained by cutting out the steel plate of FIG.

FIG. 3 is a sectional view of the material shown in FIG.

FIG. 4 is a plan view of a plate (laminated core) in which a material is spirally wound by 360 degrees.

5A is a side view of FIG. 4, FIG. 5B is a laminated core of FIG. 4, and FIG. 5C is a wound core.

FIG. 6 is a plan view of a grain-oriented electrical steel sheet used in the present invention.

FIG. 7 is a plan view of a spirally wound plate with teeth having an extra portion of one or more turns.

FIG. 8 is a side view of FIG. 7.

[Explanation of symbols]

1 Material 2 Rolling direction 3 Cut surface 4 perpendicular to the rolling direction 4 Cut material 5 4 Length direction of material (width direction of material 1) 6 Surface perpendicular to length direction and including rolling direction 7 Plate Thick direction 11 Spiral wound core (cylindrical core) 12 Joined portion 12 'Winding start portion 13 Radial direction (rolling direction 2) 14 Helical wound plate with teeth having a punched excess of one or more turns 15 Air bag 16 Teeth 17 Radial direction (Rolling direction 2) 18 Joining part 19 Excessive part of one turn or more

Front page continuation (58) Fields surveyed (Int.Cl. ⁷ , DB name) H02K 1/18 C21D 8/00 C22C 38/00 H01F 3/00 H02K 1/00

Claims (4)

(57) [Claims] 1. No notch for spiral machining is provided.
Formed by winding helically the steel sheet in the laminate device, spiral wound
The major crystal surface orientation of the steel sheet surface is {011} major crystal orientation in the radial direction from the center of the spirally wound is <100>, 30 degrees or crystal plane {011} is against the surface of the steel sheet
Where the crystal orientation <100> is 30 degrees or less with respect to the radial direction.
Among them, a spirally wound steel plate laminated component, characterized in that the thickness deviation in the plate width direction is 4% or less and the space factor when laminated is 95% or more. 2. The laminated component according to claim 1, wherein the laminated component is sheared for each winding and laminated. 3. The total elongation in the longitudinal direction of the material constituting the laminated part: P (%) and the outer diameter R and the inner diameter r of the spirally wound steel sheet.
The laminated component according to claim 1 or 2, wherein the ratio R / r of R satisfies the following formula. 1.2 ≦ R / r ≦ (100 + P) / (100−P) 4. A surface treatment is applied to a steel plate surface after spiral winding.
4. The method according to any one of claims 1 to 3, characterized in that
Laminated component according to.