JPH104656A - Member for stator core and manufacture of stator core using it and member for stator core and stator core using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the loss in a steel strip, so as to eliminate the deformation of a stator core itself by arranging caulking sections at specific locations of a member for stator core and, after punching the caulking sections, providing cut sections on the outer periphery of the member for stator core, corresponding to the punched caulking section by punching the outer periphery of the member for stator core. SOLUTION: Cut sections (e), and (g), (f) and (h) are provided perpendicular to center lines (c) and (d), connecting the center of a member 8(1) for stator core and members 7(2) and 8(2) for stator core which are brought into contact with the member 8(1), by leaving cutting margins at the locations where the lines (c) and (d) intersect the outer periphery of the member 8 (1), and caulking sections Ke, Kf, Kg, and Kh are provided perpendicular to the lines (c) and (d) on the outer edge of the member 8(1), corresponding to the cut sections (e), (f), (g), and (h). Since the entire outer periphery of the member 8(1) is punched, including the cut sections (e), (f), (g), and (h) after the caulking sections Ke, Kf, Kg, Kh, etc., arranged at specific positions have been punched, a narrow steel strip can be used.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a member for a stator core, a method for manufacturing a stator core using the same, a member for a stator core, and a stator core using the same. The present invention relates to a method for manufacturing a stator core, in which a stator core member is manufactured by efficiently punching, and a required number of the stator core members are laminated to manufacture a stator core, and a stator core member and a stator core manufactured by this method. Things.

[0002]

2. Description of the Related Art A cross section of a conventional hermetic compressor is shown in FIG. Reference numeral 50 denotes a sealed container having an oil reservoir 51 in which oil is stored at the bottom.
However, the rotary compression elements 53 are respectively housed on the lower side. The electric element 52 includes a rotor core 55 mounted on a rotating shaft 54.
And a stator core 5 having an oil return hole 56 formed in the outer periphery.
7 and the like. Reference numeral 58 denotes an air gap formed by the outer periphery of the rotor core 55 and the inner periphery of the stator core 57. Reference numeral 59 denotes a coil end of a winding built in the stator core 57. The rotary compression element 53 is a cylinder 60
And a roller 62 which rotates in the cylinder 60 by an eccentric portion 61 of the rotating shaft 54, and a cylinder 60
Vane 63 for dividing the inside, an upper bearing portion 64 and a lower bearing portion 65 for closing the opening of the cylinder, a discharge valve 66 attached to the upper bearing portion, and a cup muffler 67 covering the discharge valve.
It is composed of Reference numeral 68 denotes a discharge hole provided in the cup muffler 67. Reference numeral 69 denotes a refrigerant discharge pipe penetrating through the center of the upper portion of the sealed container 50 having the upper portion sealed by joining the end cap 70. 71 is an accumulator. Arrows indicate the flow of the refrigerant.

In the hermetic compressor having this structure, the refrigerant compressed by the rotary compression element 53 is supplied to the air gap 5 of the electric element 52.
8 and is delivered to the top of this motorized element. And
The refrigerant sent to the upper part of the electric element 52 is supplied to the rotor core 5.
The oil contained therein is separated by the centrifugal force generated by the rotation of No. 5. The separated oil is supplied to the stator core 57
It is shaken to the side. Then, the refrigerant gas is discharged from the refrigerant discharge pipe 69 to the outside of the closed container 50. The separated oil is returned to the oil reservoir 51 of the closed casing 50 from an oil return hole 56 formed on the outer periphery of the stator core 57.

FIG. 9 is an explanatory view illustrating a conventional punching machine for manufacturing a rotor core and a stator core. In FIG. 9, reference numeral 79 denotes a punching machine for manufacturing a rotor core and a stator core. The punching machine 79 has a plurality of punching male dies [first row of 80 ( 1) to 84 (1) and a second row of 80 (2) to 84 (2)] and a plurality of punching male dies [first row of 8] for making a stator core member.
6 (1) -88 (1) and 86 (2) -88 in the second row
(2)], and a plurality of female dies for punching corresponding to the male dies are provided at a lower portion. The steel strip S is continuously supplied between the male die and the female die, and the male die is moved up and down so as to be staggered in two rows in the width direction of the steel strip S and sequentially in the longitudinal direction. A portion is punched out to manufacture a rotor core member having a plurality of caulked portions. 85 (1) and 8
Reference numeral 5 (2) denotes a female die for forming a rotor core by pressing and laminating the required number of members for the rotor core, and reference numerals 89 (1) and 89 (2) denote outlets for the rotor core. Next, the outer peripheral portion of the steel strip S from which the rotor core member has been punched is further punched out at necessary places to form a stator core member having a plurality of caulked portions, and a necessary number of the stator core members are laminated to form a stator core. make. 91 (1) and 9
1 (2) is to press the required number of stator core members
Female molds 90 (1) and 90 (2) for stacking and forming a stator core are shown at the outlet of the stator core, and a is a play area where punching is not performed.

FIG. 10 shows a steel strip S using a punching machine 79.
It is a top view which shows the state which punched out. Reference numeral 80 in the figure
Reference numerals (1) to 84 (1) and 80 (2) to 84 (2) denote members corresponding to the male die for a rotor core punched out of necessary portions, and 86 (1) to 88 (1) and 86
Reference numerals (2) to 88 (2) denote stator core members punched out of required portions in the corresponding male mold. In the figure, the same reference numerals as those in FIG. 9 indicate the same parts. K1 and K2 indicate caulking portions provided on the rotor core member, and K3 and K4 indicate caulking portions provided on the stator core member. In the figure, a portion without a corresponding symbol indicates a punched mark. Reference numerals 92, 92, 93 and 93 are guide holes for supplying the steel strip S at predetermined intervals.

FIGS. 11A to 11D show a punching machine 7.
9 males 80 (1) -83 (1) and 80 (2) -8
It is explanatory drawing explaining the detail of the member for rotor cores which punched out the required part in 3 (2). 9 in FIG.
2, 92 are guide holes for supplying the steel strip S at predetermined intervals. K1 and K2 in FIG. 11C indicate crimping portions provided on the member for the rotor core.

FIG. 12 (a) shows a second row in which there is a play area where punching is not performed, and a first row in which a male member 84 (1) is used for a rotor core member whose outer periphery is punched, and the rotor core member is added. It is explanatory drawing which shows the female die 85 (1) to press and laminate and the extraction opening 89 (1) of a rotor core. In (b), the first row is the trace of punching out the member for the rotor core, and the second row is the male mold 84.
A rotor core member having an outer periphery punched in (2), and a female die 85 for pressing and laminating a required number of the rotor core members
It is explanatory drawing which shows (2) and the extraction opening 89 (2) of a rotor iron core, (c) is explanatory drawing which shows a punching mark, (d) is the male mold 86 of the 1st row and the 2nd row ( It is explanatory drawing which shows the detail of the member for stator cores which punched out the required part containing four crimping parts K3 and K4 in 1) and 86 (2), respectively. (C) 93, 93 are guide holes punched out again to supply the steel strip S at predetermined intervals.

FIG. 13A is an explanatory view showing details of a stator core member in which required portions are punched out of male dies 87 (1) and 87 (2) in the first and second rows, respectively. (B) is a play area where punching is not performed in the second row,
The first row is a male member 88 (1) for a stator core member whose outer periphery is punched, a female die 91 (1) for pressing and laminating the stator core member, and a stator core outlet 90.
It is explanatory drawing which shows (1). (C), the first row is a stamped mark, the second row is a male member 88 (2) for a stator core member whose outer periphery is punched, and a female die 91 for pressing and laminating the required number of stator core members. It is explanatory drawing which shows (2) and the extraction opening 90 (2) of a stator core.

FIG. 14 shows a stator core member in which required portions are punched out of first-row male dies 87 (1) and 88 (1), and second-row male dies 86 (2) and 87, respectively.
It is explanatory drawing which shows the relationship with the member for stator cores which punched out the required part in (2), respectively.

FIG. 15A is an explanatory view showing an example of a caulking section, and FIG. 15B is an explanatory view showing another example of a caulking section.

FIG. 16A is an explanatory view showing one example of a rotor core member manufactured by the above method, and FIG. 16B is a rotor obtained by pressing and laminating a required number of the rotor core members. It is explanatory drawing which shows an iron core.

FIG. 17A is an explanatory view showing an example of a stator core member manufactured by the above method, and FIG.
FIG. 4 is an explanatory view showing a stator core obtained by pressing and laminating a required number of members for the stator core. K in the figure indicates a caulked portion.

[0013]

However, as shown in FIG. 14, the outer circumferences of the stator core members (radius r) 86 (2) and 87 (1) in the first and second rows, 87 (1), 87
(2) and 87 (1), 87 (2) and 88
In the outer circumferences of (1), the arcs of radius r are in contact with each other except for the cutting margin. Therefore, it is necessary to use a wide steel strip to manufacture them, and the loss of the steel strip becomes large. was there. Further, as shown in FIG. 14, the outer periphery of the stator core member corresponding to the location where the four caulked portions (for example, the four caulked portions K3 of the stator core member 87 (1)) are provided. Is punched into an arc with a radius r. Therefore, if a stator core manufactured by pressing and laminating the required number of stator core members is used as an electric element, Due to the internal stress and distortion, there is a problem that the outer periphery of the stator core member corresponding to the location where the caulking portion is provided swells and the stator core itself is deformed accordingly.

FIGS. 18A to 18C are explanatory views for explaining the bulge on the outer periphery of the stator core member corresponding to the location where the caulking portion is provided. (A) is an explanatory view showing a part of the outer periphery of the stator core member, and (b) is an explanatory view showing a caulking portion provided at a predetermined position near the outer periphery of the stator core member. (C) shows that when the stator core manufactured using this member for a stator core is actually used as an electric element, the crimped portion is deformed due to internal stress and distortion caused by punching of the crimped portion. It is explanatory drawing which shows that a deformation part arises in the outer periphery of the member for stator cores corresponding to the provided part.

An object of the present invention is to use a steel strip having a small width, thereby reducing the loss of the steel strip, and providing a caulked portion due to internal stress and distortion caused by punching of the caulked portion. It is to provide a method for manufacturing a stator core member and a stator core using the same, which have no problem such that the outer periphery of the stator core member corresponding to the place that bulges or the stator core itself deforms accordingly. Another object of the present invention is to provide a stator core member manufactured as described above and a stator core using the same.

[0016]

Means for Solving the Problems As a result of intensive studies on such a problem, the present inventors have found that a caulked portion is arranged at a specific position of a member for a stator core, and after the caulked portion has been punched out in advance, the outer periphery is formed. It has been found that the above problem can be solved by punching out and providing a cut portion on the outer periphery of the stator core member corresponding to the location where the crimping portion is provided, and the present invention has been accomplished.

According to a first aspect of the present invention, there are provided a plurality of punching male dies at an upper portion and a plurality of punching female dies at a lower portion,
A steel strip is continuously supplied between the male die and the female die of a punching machine for manufacturing a rotor core and a stator core by moving the male die up and down, and staggered in two rows in the width direction of the steel strip. In the same manner, a required number of rotor core members having a plurality of caulked portions formed by punching out necessary portions sequentially in the longitudinal direction are stacked in a required number to form a rotor core, and then the outer peripheral portion obtained by punching out the rotor core member is further formed. In making a stator core member having a plurality of caulked portions by sequentially punching out necessary portions, first, a necessary portion including a plurality of caulked portions is punched out, and then an outer periphery is punched out to make a stator core member. For a stator core in which a necessary number of members are laminated to form a stator core, and a method of manufacturing a stator core using the same, wherein a required portion of a first row of the two rows is punched out. The line connecting the centers of the members of the data core and the line connecting the centers of the members of the stator core punched out of the required positions in the second row of the two rows are parallel to the longitudinal direction of the steel strip; The outer peripheries of the first and second rows of stator core members are in contact with each other leaving a cut margin, and their outer peripheries are in contact with the widthwise ends of the steel strip leaving a cut margin. The center line connecting the center of the stator core member and the center of the second row of stator core members in contact with the stator core member with a cut margin intersects the outer periphery of the stator core member. A member for a stator core, wherein a cut portion is provided at right angles to a center line, and the caulking portion is provided at an outer edge of the member for stator core corresponding to the cut portion at a right angle to the center line. And use it And a method for manufacturing a stator core.

According to a second aspect of the present invention, in the manufacturing method according to the first aspect, the number of the caulked portions is four, and when a member for a stator core provided with four caulked portions is manufactured. ,
At least one of the four crimping portions is punched in the next step or a further step.

According to a third aspect of the present invention, in the manufacturing method according to the first or second aspect, a necessary portion is drawn at right angles to a longitudinal direction of the steel strip from the center of the stamped stator core member. The line where the line intersects the outer periphery of the member for stator core and the line drawn parallel to the longitudinal direction of the steel strip from the center of the member for stator core intersects the outer periphery of the member for stator core with respect to the line 4 at right angles
It is characterized in that an oil return cut portion is provided.

According to a fourth aspect of the present invention, there is provided a member for a stator core, which is manufactured by the manufacturing method according to the first to third aspects.

According to a fifth aspect of the present invention, there is provided a stator core manufactured by the manufacturing method according to any one of the first to third aspects.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory view for explaining a punching machine for manufacturing a rotor core and a stator core according to the present invention. In FIG. 1, reference numeral 1 denotes a punching machine for manufacturing a rotor core and a stator core. The punching machine 1 includes a plurality of punching male dies [first row 1 ( 1) to 4 (1) and 2 (1) to 4 (2) in the second row] and a plurality of punching male dies [7 in the first row] for forming a stator core member.
(1) to 9 (1) and 7 (2) to 9 (2) in the second row]
And a plurality of punching female dies corresponding to each of the male dies at the lower portion. The steel strip Sa is continuously supplied between the male die and the female die, and the male die is moved up and down so as to be staggered in two rows in the width direction of the steel strip Sa and sequentially in the longitudinal direction. A portion is punched out to manufacture a rotor core member having a plurality of caulked portions. 5 (1) and 5 (2)
Denotes a female die for forming a rotor core by pressing and laminating the required number of members for the rotor core, and 6 (1) and 6 (2) denote outlets for the rotor core. Next, the outer peripheral portion from which the rotor core member has been punched is further punched out at necessary places to form a stator core member having a plurality of caulked portions, and a necessary number of the stator core members are laminated to form a stator core. 10 (1) and 10 (2) are female dies for forming a stator core by pressing and laminating the required number of members for the stator core, and 11 (1) and 11 (2) are outlets for the stator core. A indicates a play point.

FIG. 2 is a plan view showing a state in which the steel strip Sa is sequentially punched by using the punching machine 1. Symbol 1 in the figure
(1) to 4 (1) and 1 (2) to 4 (2) indicate the corresponding male mold members for the rotor core punched out of necessary portions, and 7 (1) to 9 (1) and 7 (2) to 9 (2)
Indicates a stator core member punched out of a required portion in the corresponding male mold. k indicates a caulked portion, and the same reference numerals in FIG. In the drawing, a portion without a symbol indicates a punching mark. Reference numerals 12, 12, 13, and 13 are guide holes for supplying the steel strip Sa at predetermined intervals.

FIGS. 3 (a) to 3 (c) show rotor cores punched out at necessary locations by the male dies 1 (1) to 3 (1) and 1 (2) to 3 (2) of the punching machine 1. It is an explanatory view for explaining the details of the member for use. Reference numerals 12 and 12 in (a) denote guide holes for supplying the steel strip Sa at predetermined intervals. In the step (c), five caulking portions k are provided. (D)
The second row is a play area where punching is not performed, and the first row is a rotor core member whose outer periphery is punched by the male die 4 (1) of the punching machine 1, and a female die 5 for pressing and laminating the rotor core member.
It is explanatory drawing which shows (1) and the extraction opening 6 (1) of a rotor core.

In FIG. 4A, the first row shows the trace of the punching (play area where punching is not performed), and the second row has the outer periphery punched by the male mold 4 (2) of the punching machine 1. It is explanatory drawing which shows the member for rotor cores, the female type | mold 5 (2) which presses and laminates the member for rotor cores, and the extraction opening 6 (2) of a rotor core. (B) shows the trace of punching (play area where punching is not performed), and (c) shows the male mold 7 in the first row.
In (1), the second row is an explanatory view for explaining details of a stator core member in which required portions are punched out in the male mold 7 (2). Although the first row of stator core members 7 (1) are provided with crimping portions k at four locations, there is no room for attaching a male die for punching the crimping portions, so the second row of stator core members 7 (1) is not provided.
In (2), only three crimping portions k were provided. (D) is an explanatory view for explaining the details of the stator core member in which the first row is the male die 8 (1) and the required rows are punched out of the male die 8 (2). In the second row, the remaining one caulked portion k was provided. 13 (b) are guide holes punched out again to supply the steel strip Sa at predetermined intervals.

FIG. 5 (a) shows a second row of play locations where punching is not performed, a first row of a male member 9 (1) for a stator core member whose outer periphery has been punched, and a stator core member thereof. It is explanatory drawing which shows the female mold | die 10 (1) to press and laminate, and the take-out opening 11 (1) of a stator core. (B) is the second
The row is a male die 9 (2), a stator core member punched out on the outer periphery, a female die 10 (2) for pressing and laminating the required number of stator core members, and a stator core outlet 1.
It is explanatory drawing which shows 1 (2). The first column shows the stamping marks.

FIG. 6 shows the first row of male dies 8 (1) and 9
Explanatory drawing showing the relationship between a stator core member in which necessary portions are punched out in (1), and a stator core member in which required portions are punched out in male members 7 (2) and 8 (2) of the second row. It is. In FIG. 6, a line a connecting the centers of the stator core members 8 (1) and 9 (1) in the first row and the stator core members 7 (2) and 8 ( The line b connecting the centers in 2) is parallel to the longitudinal direction of the steel strip Sa (about 226.0 mm in width). Also, the first and second rows of the stator core members 8 (1), 9 (1), 7 (2) and 8
The outer circumference of (2) is cut off from each other (about 0.95 mm to 1.0
mm) while leaving the steel strip S
Cut edge at the end in the width direction of a (about 0.95 mm to 1.0 m
m).

Then, for example, the center of the first row of the stator core members 8 (1) and the second row of the stator core members 7 in contact with the stator core members 8 with a cut-off margin.
Cut portions e and g are provided at right angles to the center line c at locations where the center lines c and d connecting the centers of (2) and 8 (2) intersect with the outer periphery of the stator core member 8 (1). Cut portions f and h are provided at right angles to the center line d, and stator core members 8 corresponding to the cut portions e, f, g and h are provided.
At the outer edge of (1), caulking parts Ke, Kf, Kg, Kh are provided at right angles to the center lines c and d. The other stator core members 9 (1), 7 (2) and 8 (2) are also provided with four cut portions and four caulking portions K in the same manner as the stator core member 8 (1). is there. e, f, g
Cut portions such as h and h form an oil return hole on the outer periphery of the stator core.

Also, for example, the stator core member 8 (1)
A line i drawn perpendicularly to the longitudinal direction of the steel strip Sa from the center of the steel core Sa intersects the outer periphery of the stator core member 8 (1).
A line a drawn in parallel with the longitudinal direction of the steel strip Sa from the center of the stator core member 8 (1) intersects the outer periphery of the stator core member 8 (1) with respect to the line a. Oil return cuts Kk and Kl are provided at right angles. In this example, the angle Θ between the center line d and the line i is Θ
Was about 29 ⁰ 18 '. Other stator core member 9
(1), 7 (2) and 8 (2) are also provided with four oil return cuts in the same manner as the stator core member 8 (1). Cut portions such as Ki, Kj, Kk and Kl form oil return holes on the outer periphery of the stator core.

FIG. 7A is an explanatory view showing an example of a member for a stator core of the present invention, and FIG. 7B is a diagram of the present invention obtained by pressing and laminating a required number of members for a stator core of the present invention. It is explanatory drawing which shows the example of a stator core.

In the present invention, Ke, Kf, Kg, Kh
The number, size, shape, and the like of the crimped portions are not particularly limited. The conventional caulking part shown in FIG. 15 can also be used. The number is two or more, but if it is too large, punching is troublesome, loss is increased, and the electromagnetic characteristics of the stator core are adversely affected, so four is preferable. In the present invention, the cut portions e, f, g, and h and the oil return cut portion K
The dimensions, shapes, and the like such as i, Kj, Kk, and Kl are not particularly limited. If the cut area is large, the oil return will be good, but the electromagnetic characteristics of the stator core will be adversely affected.

As described above, Ke arranged at a specific position,
By punching out the entire outer periphery including the cut portions e, f, g, and h after punching out the caulked portions such as Kf, Kg, and Kh, it becomes possible to use a steel strip having a small width, thereby reducing the loss of the steel strip. it can. For example, conventionally, to manufacture a stator core member having an outer diameter of 121.7 mm shown in FIG. 7A, a steel strip having a width of 227.5 mm must be used. Although the loss rate was about 40 to 50%, according to the present invention, a steel strip having a width of about 226 to about 224 mm may be used for manufacturing a stator core member having the same outer diameter.
And the loss rate of the steel strip was able to be reduced by about 40% compared with the conventional case. In addition, the stator core member of the present invention and the stator core using the same have Ke,
Even if the cut portions e, f, g, and h corresponding to the portions where the caulked portions such as Kf, Kg, and Kh are present may be slightly deformed, the stator may cause a substantial obstacle as shown in FIG. The outer periphery of the iron core member was not deformed, and the stator core itself was not deformed so as to cause a substantial obstacle.

[0033]

According to the present invention, a steel strip having a small width can be used, the loss of the steel strip can be reduced, and the stator corresponding to the location where the caulked portion is located due to internal stress and distortion caused by punching of the caulked portion. It is possible to provide a stator core member and a stator core using the same, which have no problems such as the outer periphery of the core member bulging and the stator core itself deforming accordingly.

[Brief description of the drawings]

FIG. 1 is an explanatory view illustrating a punching machine for manufacturing a rotor core and a stator core of the present invention.

FIG. 2 is a plan view showing a state in which steel strips are sequentially punched using the punching machine of FIG.

FIGS. 3 (a) to 3 (c) show a rotor core member punched out of a necessary portion, FIG. 3 (d) shows a play portion where punching is not performed in a second row, and a male mold 4 ( It is explanatory drawing which shows the member for rotor cores which punched the outer periphery in 1), the female type | mold 5 (1) which presses and laminates the members for rotor core, and the extraction opening 6 (1) of a rotor core.

FIG. 4 (a) shows the trace of the first row punched out,
The second row is a male member 4 (2) for a rotor core member whose outer periphery has been punched out, and a female die 5 for pressing and laminating the rotor core member.
It is explanatory drawing which shows (2) and the extraction opening 6 (2) of a rotor iron core, (b) is the mark which was punched out, (c)-.
(D) is an explanatory view for explaining the details of the stator core member from which necessary parts have been punched out.

FIG. 5 (a) is a second row of play locations where punching is not performed, the first row is a stator core member whose outer periphery is punched out by a male die 9 (1), and the stator core member is pressurized and pressed. Female die 10 (1) to be laminated and outlet 1 for stator core
FIG. 1B is an explanatory view showing 1 (1), and FIG. 2B is a diagram illustrating a second row in which a male die 9 (2) is used to punch out the outer periphery of a stator core member, and the required number of stator core members are pressurized and laminated. Female die 10 (2) and outlet 11 (2) for stator core
FIG. 3 is an explanatory diagram showing the first example, and the first column shows a punched mark.

FIG. 6 shows stator core members 8 (1) and 9 (1) punched out of the first row at required positions, and stator core members 7 (2) and 8 punched out of the second row at required portions.
It is explanatory drawing which shows the relationship of (2).

7A is an explanatory view showing one example of a stator core member of the present invention, and FIG. 7B is a stator core of the present invention obtained by pressing and laminating a required number of stator core members of the present invention; FIG. It is explanatory drawing which shows the example of.

FIG. 8 is a sectional view of a conventional hermetic compressor.

FIG. 9 is an explanatory view illustrating a conventional punching machine for manufacturing a rotor core and a stator core.

FIG. 10 is a plan view showing a state where a steel strip is punched using a conventional punching machine.

FIGS. 11A to 11D are explanatory views illustrating details of a rotor core member obtained by punching out a necessary portion with a conventional punching machine.

FIG. 12 (a) shows a play area where punching is not performed in the second row, a rotor core member whose outer periphery is punched out by the male mold 84 (1), and a first row pressurizes and presses the rotor core member. Female die 85 (1) to be laminated and outlet 89 for rotor core
It is explanatory drawing which shows (1), (b) is a 2nd row, the male type | mold 8
4 (2) A member for the rotor core punched out in the outer periphery, and a female die 85 for pressing and laminating a required number of the members for the rotor core
It is explanatory drawing which shows (2) and the extraction opening 89 (2) of a rotor core, (c) shows a punching mark, (d)
It is explanatory drawing which shows the detail of the member for stator cores which punched out the required part containing four crimping parts K3 and K4.

FIG. 13A is an explanatory view showing details of a stator core member punched out of necessary portions, and FIG.
The row is a play area without punching, the first row is a male 88
FIG. 9C is an explanatory view showing a stator core member having an outer periphery punched in (1), a female die 91 (1) for pressing and laminating the stator core member, and a stator core outlet 90 (1); In the first row, stamping marks are shown in the first row, and a stator core member whose outer periphery is punched out by the male die 88 (2), and a female die 91 for pressing and laminating the required number of stator core members are shown in the second row. (2) and stator core outlet 9
It is explanatory drawing which shows 0 (2).

FIG. 14 is a diagram illustrating stator core members 87 (1) and 88 (1) punched out of a required portion of a first row, and stator core members 86 (2) and 87 () punched out of a required portion of a second row. It is explanatory drawing which shows the relationship with 2).

15A is an explanatory diagram illustrating an example of a caulking portion, and FIG. 15B is an explanatory diagram illustrating another example of a caulking portion.

FIG. 16 (a) is an explanatory view showing an example of a conventional rotor core member, and FIG. 16 (b) is an explanatory view showing a rotor core obtained by pressing and laminating a required number of conventional rotor core members. is there.

FIG. 17 (a) is an explanatory view showing an example of a conventional stator core member, and FIG. 17 (b) is a view showing a conventional stator core obtained by pressing and laminating a required number of conventional stator core members. FIG.

FIGS. 18 (a) to (c) are explanatory views for explaining the bulge on the outer periphery of the stator core member corresponding to the location where the caulking portion is provided.

[Explanation of symbols]

1 punching machine 1 (1) -4 (1), 1 (2) -4 (2), 7 (1)-
9 (1), 7 (2) -9 (2) Male 5 (1), 5 (2), 10 (1), 10 (2) Female 6 (1), 6 (2), 11 (1) ), 11 (2) Outlets e, f, g, h Cut parts Ki, Kj, Kk, Kl Oil return cut parts Ke, Kf, Kg, Kh Caulking parts S, Sa Steel strip

Claims (5)

[Claims] 1. A punching machine for manufacturing a rotor core and a stator core by moving a plurality of punching male dies at an upper portion and a plurality of punching female dies at a lower portion to produce a rotor core and a stator core. A steel core is continuously supplied between the molds, and a plurality of caulked portions are formed by punching necessary portions in a staggered manner in two rows in the width direction of the steel strip and sequentially in the longitudinal direction. When a necessary number of members are laminated to form a rotor core, and then the outer peripheral portion obtained by punching out the rotor core member is further punched out at necessary places to form a stator core member having a plurality of caulked portions, first, a plurality of caulking members are formed. After punching out the necessary portion including the tightening portion, the outer periphery was punched out to produce a stator core member, and a necessary number of the stator core members were laminated to form a stator core member, and the stator core member was used. S A method for manufacturing a data core, wherein a line connecting the centers of the stator core members punched out of a required portion of a first row of the two rows and a required portion of a second row of the two rows are punched. The line connecting the centers of the removed stator core members is parallel to the longitudinal direction of the steel strip, and the outer circumferences of the first and second rows of the stator core members are in contact with each other with a margin for cutting. The outer periphery is in contact with the widthwise end of the steel strip with a cut margin left, and the center of the first row of stator core members is in contact with the stator core member in the second row with a cut margin left. A cut portion is provided at a position where a center line connecting the centers of the stator core members intersects the outer circumferences of the stator core members at right angles to the center line, and an outer edge of the stator core member corresponding to the cut portion is provided. To the center line Method for manufacturing a stator core using the same member and the stator core, characterized in that a said caulked portion at a right angle. 2. The method according to claim 1, wherein the number of the caulking portions is four, and when manufacturing a stator core member provided with four caulking portions, at least one of the four caulking portions includes the following steps. The method according to claim 1, wherein punching is performed in a further step. 3. A line drawn perpendicularly to the longitudinal direction of the steel strip from the center of the stator core member from which a necessary portion has been punched, intersects the outer periphery of the stator core member and the center of the stator core member. The oil return cut portion is provided at a position where a line drawn in parallel with the longitudinal direction of the steel strip intersects the outer periphery of the stator core member at right angles to the line. Or Claim 2
The manufacturing method as described. 4. A member for a stator core, which is manufactured by the manufacturing method according to claim 1. 5. A stator core manufactured by the manufacturing method according to claim 1.