JPH02106151A - Method and device for manufacturing winding stator core - Google Patents

Abstract

PURPOSE:To eliminate troublesome caulking integration after lamination, when a strip member is wound tubularly, by laminating and caulking adjacent thin board sections through fitting and caulking of rising sections formed with predetermined interval. CONSTITUTION:A winding stator core 100 is constructed by machining one side of a strip comprising a thin iron plate into approximately comb shape and forming rising sections 102 at the other side then winding the strip spirally by a predetermined length with the comb shaped side directing inward and integrally laminating the strip in tubular. The tubularly laminated strips are integrated through fitting of adjacent rising sections 102, and slots are formed by the comb-shaped sections 104 at the inside of the winding stator core 100. The rising sections 102 are projecting trapezoidally toward one side, and the tubularly laminated strip layers are laminated through fitting of the rising sections 102 in the front and rear. When the strip is wound by predetermined length and cut off, a predetermined winding stator core can be taken out in the form of a laminated body or a stator core product.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a stator core of a rotating machine such as an electric motor or a generator,
In particular, the present invention relates to a method and an apparatus for manufacturing a wound stator core in which strips of iron plates are spirally wound and laminated into a cylindrical shape, and each layer of the strips is fixed together.

[Prior art] The stator core, which is constructed by laminating multiple ring-shaped core materials formed by punching out fli4i, has a low yield, so thin and thin iron plates are wound spirally and stacked into a cylindrical shape. A wound-shaped stator core made of the same material is sometimes used as a stator core for rotating machines such as electric motors and generators.

An example of such a wound stator core is a strip of thin iron plate punched into a substantially comb-shape, which is plastically deformed into a ring shape in the same plane with the substantially comb-shaped side punched out inside. It is known that the strips are wound spirally and laminated into a cylindrical shape, and each layer of the strip is fixed together by welding (see Japanese Patent Publication No. 38-18403 and Japanese Patent Publication No. 60-46620). ).

Furthermore, Japanese Patent Publication No. 38-18403 also discloses a method and apparatus for manufacturing such a wound stator core. Furthermore, Japanese Patent Laid-Open No. 53-85306 and Japanese Patent Publication No. 60-46620 also disclose a method of manufacturing such a wound laminated iron core.

FIG. 12 is an explanatory diagram of a manufacturing apparatus for a wound stator core described in Japanese Patent Publication No. 38-18403.

In the figure, reference numeral 2 denotes a strip of thin steel plate wound into a thin drum shape. This wound strip is supported on a support stand 4, and one end of the strip is fed to a punching press to be described later. , 6 is a punching press installed next to the support base 4, and this punching press has a die die, which allows one edge of the strip to be punched into a substantially comb shape. It looks like this.

Reference numeral 8 denotes an annealing ceiling provided next to the punching press 6, in which the strip whose edges have been punched into a substantially comb shape by the punching press 6 is annealed and softened. The strip softened in the annealing fire 8 passes through the winding section IO, is wound up in a helical manner around the spline arbor 12, is punched by a punching device 14, and is laterally rolled along the spline arbor 12. direction, resulting in a stack 18 of cylindrical strips in the separating device 16.

Deposition 18 of strips formed by separation device 16
is moderately compressed from both sides, and the periphery thereof is fastened and fixed by welding or the like using the fastening device 20. The pile of fastened strips 18 is conveyed to a tilting table 22 and passed through a stress relief canopy 24 where it is subjected to internal stress relief and to improve the electrical properties of the metal, and to a suitable electric motor. Each side surface is provided with a suitable oxide insulating coating as desired in the stator structure.

[Problems to be Solved by the Invention] However, the above-described conventional method for manufacturing a wound stator core requires welding and fixing the periphery of the pile of wound strips at multiple locations, which is time-consuming. There was a problem in that the manufacturing cost was high.

In addition, the above-mentioned conventional wound stator core manufacturing equipment involves winding and forming punched strips, aligning them, separating them, and fixing them by welding, which requires a very large equipment (line).
There were problems in that it required a large installation space and at the same time, it was extremely difficult to support multi-product production. Furthermore, since this device is expensive, there is a problem in that it also puts pressure on the manufacturing cost of the wound stator core.

Furthermore, Japanese Patent Application Laid-open No. 53-85306 and Japanese Patent Publication No. 1986-
The method described in Publication No. 46620 is constructed so that after the laminated iron core is wound and laminated, pressure is applied up and down to make them stick together, which increases the number of steps and lengthens the overall process time (such as There were also problems.

This invention was made to solve these problems, and is a method and apparatus for manufacturing a wound stator core that is compact and capable of synchronizing winding forming and fixing/separation with punching in real time. The purpose is to obtain.

[Means and effects for solving the problem] A method of manufacturing a wound stator core according to the present invention includes processing a strip made of an iron plate into a substantially comb shape on one side, and forming a cut-and-raised portion on the other side. The strips are formed into a cylindrical shape, with the roughly comb-shaped side facing inside and spirally wound for a predetermined length to form a cylindrical stack. In a method for manufacturing a wound stator core in which the wound strip is integrally fitted, a rotational force that winds up the wound strip every predetermined rotation and a lateral pressure or push-up force from below applied to the wound cylindrical outer shape are applied. The above-mentioned problems have been solved by laminating and caulking the strip, and cutting the strip after winding it to a predetermined length.

Here, the predetermined rotation is given in synchronization with the stroke (vertical movement) of the punching press and the feed of the punching press, and the number of rotations is 1/n (n: an integer of 1 or more).

Further, the apparatus for manufacturing a wound stator core according to the present invention includes a punching press that processes one side of a strip made of an iron plate into a substantially comb shape and forms a cut and raised portion on the other side; A winding forming device that spirally winds a predetermined length with the substantially comb-shaped side facing inside and stacks the strip layers in a cylindrical shape; The above-mentioned problem has been solved by comprising a core caulking device for fitting the strip, and a cutting device for cutting the strip after winding it to a predetermined length in a winding device.

Here, the punching press is for N iron cores (N is an integer of 1 or more)
A material supply device is installed before the punching press to correct the strip surface and send it to the press device, and between the press device and the winding device, the material is separated by one core. A separate feeding device may be provided for feeding the material into the winding device, and a core discharge device may be provided after the strip cutting device.

[Embodiment] Fig. 1 is a perspective view showing an embodiment of the present invention, in which a wound stator iron core 10TJ has a strip made of a thin iron plate, one side of which is processed into a substantially comb shape, and the other side of which is processed into a substantially comb shape. A cut-and-raised part 102 is formed on the cylindrical part, and the approximately comb-shaped part is placed on the inside, and it is spirally wound by a predetermined length, and then laminated and fixed together into a cylindrical shape. This cylindrical laminated strip has adjacent cut and raised portions 102.
The stator cores 100 are integrally stacked by fitting the front and back sides of the stator core 100, and a slot portion formed by a comb-shaped portion 104 is formed inside the wound stator core 100.

Figure 2 is an enlarged plan view of the main part of Figure 1, and Figure 3 is [[
1l-III is a sectional view taken along arrow 1l-III, the cut-and-raised portion 102 is formed to protrude in a trapezoidal shape on one surface side, and the strip layer laminated in a cylindrical shape has this cut-and-raised portion 102 that fits together on the front and back sides. By doing so, we become one.

In addition, in this example, the position and shape of the cut-and-raised portion 102 were shown to be such that when rolled and formed, the shape would be less likely to collapse and it would be easy to fit within the device, but the shape is not necessarily limited to this shape. It is not a matter of shape, but may be of any shape as long as the front and back sides can fit together.

FIG. 4 is a perspective view schematically showing an apparatus for manufacturing the above-mentioned rolled fixed 'F iron core. In the figure, 106 is a drum around which the strip toll is wound, and +07 is the strip that comes out from this drum. Material guide to guide, 107a
1) is an uncoiler that corrects warping and flattens the strip 108 that has passed through this material guide; 12a is a slack detection arm that detects the amount of slack in the strip 108 that has come out of the uncoiler; 1) 0 is a strip 10
This is a punching press for punching 8.

A punching die 1) 0a is installed on the table of the punching press 1) 0, and the strip 108 from the uncoiler 107a passes through the material feeding device 1) 0b to this die 1).
) is sent to 0a. 1) 2 is a punching bracelet 1). The arm for detecting the amount of sag detects the slack of the strip 108' which is separated into two at 1). This is the main body of the device for forming and core caulking.

The strip 108 wound around the drum 106 is the fifth
As shown in the figure, it is shaped like an elongated strip. drum 1
The strip 108 supplied from 06 is punched in the punching press 1)
0, the punching die 1) 0a is used to form two interlocking strips 108' of the cloth as shown in FIG. The two covering strips 108 are formed with a
Become ゛. The cut-and-raised part If12 is formed in the punching die 1) at this stage.
Formed by 0a.

The arm 1) 2a for detecting the amount of slack provided in front of the punching press 1) 0 is set and arranged so as not to come into contact with the top of the covering strip 108, and when the amount of slack decreases below a preset amount, , the strip comes into contact with this arm 1) 2a to stop the device. Similarly, the arm for detecting slack amount provided after the punching brace 1) 2
is provided in contact with the covering strip 108'. The slack amount detection arm 1) 2 is designed to stop the device when it detects slack exceeding a preset range.

The cloth strip 108° formed by the punching press is separated into two pieces as shown in FIG. 7, and each piece is supplied to the main body 1) 4 of the device for winding and core caulking. The cloth strip 108° supplied to the forming and core caulking device main body 1) 4 is spirally wound for a predetermined length with the approximately comb-shaped side facing inside and stacked in a cylindrical shape. .

Adjacent cut and raised portions 1 of this cylindrical laminated strip layer
The front and back sides of 02 are fitted together, and the strip 10
8 is cut after being wound by a predetermined length.

Note that a servo morph 1) 5 is installed in this device main body 1) 4 to intermittently wind in the same amount as the feed amount of the punching press 1) 0 in synchronization with the press stroke.

In addition, unloading conveyors 1) 4a and 1) 4b are installed at the bottom of the winding and core caulking device main body 1) 4, respectively, and the rolled fixed iron core that has become a product is transported out, and the next conveyor 1) 4c is installed. The structure is such that it is transported to the next process.

FIG. 8 is a partial sectional view of the main body +14 of the device for winding and core caulking.

In the figure, 1) 6 is a roll-forming bottle, 1.1.8 is a guide plate that guides this roll-forming bottle, +20
is a cam plate provided in contact with the head of the winding bottle 1) 6. Further, 122 is a strip cutting punch, 124 is a slide cam provided in contact with the head of this strip cutting punch, and 12G is an air cylinder for driving this slide cam.

Further, 128 is a roll-forming plate provided under the roll-forming bin +16, 130 is a squeeze link provided under this roll-forming plate, 132 is an inner diameter guide provided at the center of this device, and 134 is a This is a pressure pad provided at the bottom of this inner diameter guide bin. The inner diameter guide 132 is integrated with the guide plate 1) 8, and a central shaft portion 132a extends upward and is connected to a shaft 134a of a bevel gear 134 via a shaft coupling 133.

Fourth, the bevel gear 13 that meshes with this bevel gear 134
5 is a servo motor 1 attached to the outside of the device 1) 4
) 5 is connected to the output shaft 1) 5a, so that the servo motor 1) 5 and the guide 132 are interlocked.

A guide plate 1) 8 that holds the winding bin 1) 6 and feeds the strip into the squeeze ring 130 by the bin 1) 6, a cam 120 that goes into the process of forming the strip, and a winding bin 1) 6. The timing of entry and exit is as shown in FIG. That is, the state in which the roll-forming bottle 1) 6 has begun to come out is at position a in FIG. 9, and the roll-forming bottle 1). The state in which 6 is fully rolled is as shown in position b.

Note that at position C, the bottle has not yet come out.

FIG. 1O shows the arrangement of the cam plate 120, which is provided in a convex shape with respect to the inner end surface of the housing.

The winding bottle 1) 6, which has come to the position of this convex cam plate 12o, is pushed down by this convex cam plate 120, engages with the strip 108°, and forcibly winds the strip 108° into the squeeze ring. Push it to 130.

The strip cutting punch 122 is a punch for cutting the strip when it reaches a preset number of turns. The air cylinder 126 intermittently moves the slide cam 124 in the horizontal direction, and the strip cutting bunch 122 is moved up and down by the slide cam 124.

Figure 1) is a plan view showing the winding plate part taken along the line AA in Figure 8, and is a guide plate for winding the strip 108' at a predetermined radius. Strip 10 supplied from the direction indicated by the arrow in the figure
8' enters the forming plate 128, is rolled and formed in the section shown in (A) in the figure, further enters diagonally downward, passes through the section shown in (B), and is guided by the roller 128a and squeezed. Enter Ring 130. The squeeze ring 130 guides the outer diameter of the wound core, and the above-mentioned cut and raised portions 102 of the adjacent thin plate portions wound therein.
The crimping work is performed by fitting the parts together.

This is achieved by making the inner diameter of the squeeze ring 130 slightly smaller than the outer diameter of the iron core to be wound, that is, the outer diameter of the winding core. ) occurs, and furthermore, due to this low drag and soldiers,
Since this squeeze ring 130 is held in position from below by a pressure pad 136, the servo motor rotates intermittently for a minute equal to the feed amount of the punching press in synchronization with the vertical movement of the press, and the strip is placed in place by the bin 1)6. Due to the fixed amount of winding force, the strip 108' that was wound later and entered the squeeze ring 130 is pushed into the 108° portion of the strip that entered the squeeze ring 130 first, and the cut and raised portion 102 is pushed in. Strip 10 located at
It is fitted into the 8° cut-and-raised portion 102 and caulked.

Pressure pad l:) 6 has a cylinder 136 at its bottom.
a is connected and is pressed upward by fluid pressure from below, and this force also acts on the crimping operation described above and has an effect in the crimping direction. Also, this cylinder 136
After the strip is wound a predetermined number of times and cut by a punch 122, it is lowered and the completed wound iron core is carried out once a month.

The embodiments of the present invention have been described above, but in addition to this, there is also a method in which a caulking force is actively applied from above or below each time the strip is wound once or a predetermined number of times. It is also possible to add functions.

[Effects of the Invention] The invention as set forth in claim 1 is such that when the strip material is wound into a cylindrical shape as described above, adjacent thin plate portions are formed at predetermined intervals at each predetermined rotation. Since it is configured to be laminated and fixed by fitting and caulking the cut and raised parts, by winding the strip to a predetermined length and cutting it, the predetermined rolled stator core can be taken out as a laminate, that is, a stator core product. This eliminates the trouble of re-caulking and integrating the layers after lamination, and has the advantage that the wound stator core can be manufactured simply and at low cost.

The invention as recited in claim 4 is capable of laminating and fixing the spirally wound cylindrical strips without using a large-sized welding device. This has the effect of making it more compact and requiring less installation space.

In addition, the invention according to claim 4 can manufacture wound stator cores of other standards by simply replacing some parts in the molding and fitting device. This has the effect of making it easier.

Furthermore, the invention according to claim 4 laminates and fixes the spirally wound cylindrical strips together by fitting the cut and raised portions formed at predetermined intervals. There is no need to provide a heavy welding device, and no auxiliary materials such as welding rods are required, which has the effect of reducing manufacturing costs.

The invention as set forth in claim 5 enables 1π production so that a plurality of wound stator cores can be manufactured simultaneously using a compact device as a whole, making it easy to reduce costs and making mass production possible. There are some effects.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the invention according to claim 1, FIG. 2 is an enlarged plan view of the main part of FIG. 1, and FIG. 3 is a sectional view taken along the line III-III in FIG. FIG. 4 is a perspective view schematically showing an embodiment of the invention as claimed in claim 2, FIG. 5 is a plan view of the strip before pressing, FIG. 6 is a plan view of the strip after pressing, and FIG. The figure is a plan view of the strip being separated, Figure 8 is a partial sectional view of the main body of the device for winding and core caulking, Figure 9 is an explanatory diagram for explaining the timing of loading and unloading of the forming bin, and Figure 10. 1) is a view taken along the line A-A in FIG. 8, FIG. 1) is a view taken along the line B-B in FIG. 8, and FIG. 12 is an explanatory diagram of a conventional wound stator core manufacturing apparatus. 100...Wound stator core, 102-...Cut-and-raised portion,
104... Comb-shaped part, 106-... Drum, 107-...
・Material guide, 107a...Uncoiler, 108-・
・Strip, 108゛...Strip, 1)0...
・Punching press, 1) 0a... Mold, 1) 0b... Material feeding device, 1) 2, 1) 2a... Arm for detecting slack amount, 1) 4... - Winding forming and core The caulking device body,
1) 4a, b, c... unloading conveyor, 1) 5... servo motor,! 15a... Shaft, 1) 6... Bin for winding, 1) 8-... Guide plate, 120...
Cam plate, 122... punch for strip cutting,
124...-Slide cam, 126...-Air cylinder, 128... Winding molding plate, 128a...
Roller, 130...-Squeeze ring, 132--Inner diameter guide bin, 133...-Shaft coupling, 134... Bevel gear, 134a... Shaft, 135... Bevel gear,
136...Pressure pad, 136a...Cylinder. Agent Patent Attorney Kubo 1) Law Meiji Diagram Diagram

Claims (5)

[Claims] (1) Process one side of a strip made of iron plate into a roughly comb shape, form a cut-and-raised part on the other side, and turn the roughly comb-shaped side into a spiral shape for a predetermined length. In a method for manufacturing a rolled stator core, the rolled stator core is manufactured by winding and stacking the strips into a cylindrical shape, and integrating the cylindrically stacked strips by fitting the front and back sides of adjacent cut-and-raised portions together. The wound stator core is laminated and caulked by the rotational force that winds up the strip at each predetermined rotation, and the lateral pressure or push-up force applied to the wound cylindrical outer shape from below, and is cut after being wound to a predetermined length. Production method. (2) The method according to claim 1, wherein the predetermined rotation is a 1/n (n: an integer greater than or equal to 1) rotation. (3) The specified rotation is the stroke of the punching press (vertical movement)
2. The apparatus according to claim 1, wherein the feed is applied in synchronization with the feed of the punching press. (4) A punching press that processes one side of a strip made of iron plate into a roughly comb shape and forms a cut and raised part on the other side, and a predetermined length with the roughly comb-shaped side inside. A winding and forming device that spirally winds the strips and laminates them into a cylindrical shape, and a winding and forming device that is arranged continuously to the winding and forming device, and integrates the cylindrically laminated strips by fitting the front and back sides of the adjacent cut and raised parts together. 1. An apparatus for manufacturing a wound stator core, comprising: a core caulking device for rolling a strip to a predetermined length in a winding device; and a cutting device for cutting the strip after winding it to a predetermined length in a winding device. (5) A material supply device that corrects the strip surface and sends it to a press device, a press device that punches out shapes for N iron cores (N is an integer greater than or equal to 1), and a material feed device that corrects the strip surface and sends it to a press device, and a press device that punches shapes for N iron cores (N is an integer of 1 or more), and separates each iron core for one core. A separation supply device that sends out to a winding device, a plurality of winding devices that spirally wind a predetermined length with the substantially comb-shaped side inside and stack them into a cylindrical shape, and a plurality of winding devices. A manufacturing device for a rolled stator core, comprising: a core caulking device integrally provided in the core crimping device; a plurality of strip cutting devices provided in the winding device; and a core discharge device.