How to make iron chips

A manufacturing method and technology of iron chips, applied in the direction of manufacturing stator/rotor body, magnetic circuit shape/style/structure, magnetic circuit static parts, etc. gender issues

Active Publication Date: 2021-02-12
MITSUI HIGH TEC INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a problem that the workability of winding on such an integrated laminated core is poor.
If such bending is ignored and the processing of the raw material is continued, the shape of the completed split core pieces will be deformed, and as a result, gaps may be formed between the laminated split core pieces
In addition, when the split iron cores are joined to each other, a gap may be generated at the joined portion of the split iron cores.
As a result, the electromagnetic properties of the armature are sometimes impaired
Or, sometimes the electromagnetic properties of the armature can deviate

Method used

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  • How to make iron chips
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Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0066] The stator core sheet 2b passes through such as figure 2 Manufactured according to the process shown. First, if figure 2 As shown in (a), the raw material 1 is clamped between the die 5 and the stripping plate 6 installed in the press apparatus which is not shown in figure. The stamping device comprises a punch 7 that is telescopic relative to the raw material 1 . When the raw material 1 is clamped between the die 5 and the release plate 6, as figure 2 As shown in (b), the punch 7 is pressed down (advances to the raw material 1), and it abuts on the stator core piece 2b. As a result, the stator lamination 2b is cut and bent, as figure 2 As shown in (c), the boundary line 4 between the stator core sheet 2a (raw material 1) and the stator core sheet 2b is cut out.

[0067] As above, the notch bending process is completed. In addition, at this time, the stator core sheet 2b bends downward in the vicinity of the boundary line 4, and a step difference occurs betwee...

no. 2 Embodiment approach

[0073] In the first embodiment, an example was shown in which the reverse bending step was performed without going through other steps after the notch bending step, and the bending recovery step was finally performed, but the present invention is not limited thereto. For example, if image 3 As shown, the bending recovery process may be performed after the notch bending process, followed by the reverse bending process, and finally the bending recovery process may be performed again.

[0074] image 3 (a) is a figure which shows the state of the raw material 1 after completion|finish of a notch bending process, and is the same as that of the said 1st Embodiment. figure 2 (c) Corresponding figure. In the method of manufacturing the core sheet according to the second embodiment, in image 3 The raw material 1 shown in (a) is subjected to initial bending recovery processing. If the bending recovery processing is carried out, as image 3 As shown in (b), the downward bending ...

no. 3 Embodiment approach

[0076] In the first embodiment, in the reverse bending process, an example was shown in which the upwardly bent portion of the stator core piece 2b was housed in the recess 6a using the stripper plate 6 provided with the recess 6a. However, the release plate 6 used in the reverse bending process is not limited to the structure provided with such a recess 6a. For example, it is also possible to Figure 4 As shown in (a), the through-hole 6b which penetrates the release plate 6 is included. The through-hole 6 b of the stripping plate 6 is provided at a position corresponding to the protrusion 5 a included in the die 5 . In this case, the portion of the stator core piece 2b bent upward by being pressed by the protrusion 5a of the die 5 is housed in the through hole 6b. Additionally, for example if Figure 4 As shown in (b), you may provide the slider 6c which can expand and contract with respect to the stripping plate 6, and may bridge the spring 6d between the stripping plate...

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Abstract

Provided is a method of manufacturing a core sheet capable of manufacturing a practically sufficiently flat core sheet or a component attached to the core sheet. In a method for manufacturing a core sheet by stamping out a plurality of parts from one raw material (1) to manufacture a core sheet, one stator core sheet (2a) is formed adjacent to the stator core sheet (2a) and other stator core sheets ( 2b) the notch bending process of the boundary line (4); and after the notch bending process, the stator core sheet (2b) is bent in the direction opposite to the direction bent in the notch bending process, giving the stator core sheet ( 2b) A reverse bending process that brings bending in the opposite direction.

Description

technical field [0001] The present invention relates to a method of manufacturing core sheets constituting a laminated core. Background technique [0002] The armature (stator and rotor) of a rotating electric machine is formed by stacking iron sheets. The core sheet is produced by punching a plate-shaped material called an electrical steel sheet or a silicon steel sheet (hereinafter simply referred to as "material" in this specification). [0003] In general, the entire stator of a rotating electric machine is configured in a cylindrical shape. The rotor of the rotating electrical machine is formed in a cylindrical shape as a whole, and the rotor is arranged concentrically inside the stator. Conventionally, core pieces constituting such a stator have an annular planar shape. However, there is a problem in that the workability of winding in such an integrated laminated core is poor. Therefore, in recent years, the core pieces have been divided in the circumferential dire...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K15/02H02K1/18
CPCH02K1/18H02K15/02
Inventor 荒川广一莲尾裕介
Owner MITSUI HIGH TEC INC
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