WO2023074938A1

WO2023074938A1 - Core manufacturing apparatus and core manufacturing method

Info

Publication number: WO2023074938A1
Application number: PCT/KR2021/015264
Authority: WO
Inventors: 우덕균; 지정규; 권재상; 홍이경; 이정일; 최성진; 이야곱; 강석조; 남기택
Original assignee: (주)포스코에스피에스
Priority date: 2021-10-27
Filing date: 2021-10-28
Publication date: 2023-05-04
Also published as: KR20230060138A; KR102575532B1; KR20230150234A

Abstract

Disclosed are a core manufacturing apparatus and a core manufacturing method by which a laminated core is formed by integrating a plurality of laminar members using a bonding method. The core manufacturing apparatus according to the present invention comprises: a laminator having a lamination hole and including a first heater, wherein the lamination hole is formed passing through vertically in order to pass the laminar members therethrough in a laminated state, and the first heater heats the laminar members, passing through the lamination hole, from the outside of the laminar members so that the laminar members are integrated by adhesive present at the interfaces between the laminar members; a core support capable of ascending and descending and provided below the lamination hole in order to support the laminated core discharged from the lamination hole; and a second heater which can enter the lamination hole via the lower end of the lamination hole so as to heat the laminar members from the inside of the laminar members, and can move up and down by passing through the core support. According to the present invention, the laminar members are heated from the outside and inside, and thus the adhesive can be uniformly cured, and interlayer bonding between the laminar members can occur stably.

Description

Core manufacturing device and manufacturing method

The present invention relates to a core manufacturing apparatus and manufacturing method for manufacturing a core of a laminated structure by an adhesive method, and more particularly, by bonding the interfaces of laminated laminar members (laminar members) for the iron core in an adhesive manner. It relates to a core manufacturing apparatus and manufacturing method for manufacturing a core (laminated core) of a laminated structure.

In general, a laminated core refers to a core of a laminated structure manufactured by integrating a plurality of thin plates, that is, laminar members, and, for example, a plurality of laminae obtained by punching a metal strip. It means a core structure in which members are integrated into a laminated structure.

Such laminated cores are used as cores of various devices such as rotating devices such as motors, transformers, or iron cores for ignition systems, and various methods for manufacturing them are known.

As a representative method, by continuously forming and stacking laminar members of a predetermined shape using a progressive mold device, and bonding the stacked lamina members layer by layer, the core of the laminated structure, that is, the above-mentioned laminated core is manufactured. It can be.

As a method of integrating the laminar members, a tab fixing method using an interlock tab, a welding fixing method using, for example, laser welding, a rivet fixing method, and the like are known.

Examples of the tab fixing method are disclosed in patent documents such as Korean Patent Publication Nos. 10-2008-0067426 and 10-2008-0067428. There is a limit to the embossing process for forming the tab.

Recently, a technology (adhesive fixing method) for implementing interlayer bonding of lamina members by an adhesive method has been developed/used. For example, the invention of manufacturing a laminated core by applying an adhesive to the surface of a metal strip supplied to a device (mold) for manufacturing a laminated core and punching the metal strip is disclosed in Korean Patent Registration No. 10-1566491 and Japanese Laid-open Patent It is disclosed in patent documents, such as Unexamined-Japanese-Patent No. 5-304037 and Unexamined-Japanese-Patent No. 2009-297758.

In addition, the invention of manufacturing the above-described laminated core by receiving and punching a metal strip coated with an adhesive is disclosed in Korean Patent Registration No. 10-1659238, Japanese Patent Laid-Open No. 2001-291627 and Japanese Patent Laid-Open No. 2004-023829 It is disclosed in patent documents such as Ho.

According to the conventional adhesive fixing method described above, the cost can be reduced compared to laser welding, and the adhesive fixing method is known as a technology capable of responding to thinning of a steel plate.

According to the above-described adhesive fixing method, while the lamina members pass through the laminator (Laminator), more specifically, the internal space (lamination hole) of the mold (lower mold) in a laminated state, the interface (boundary surface) of the lamina members is bonded. A plurality of sheets can be integrated by

The laminator includes a squeeze member (squeeze ring of Japanese Unexamined Patent Publication No. 2009-297758) for alignment/lamination of the lamina members, and the laminator is configured at a predetermined timing ( Timing) after rotating the lamina members by a predetermined angle (index rotation), a new lamina member is supplied (index rotation lamination).

An apparatus for manufacturing a laminated core in which the lamina members index rotate is disclosed in Patent Registration Nos. 10-1876292, 10-1990291, and 10-1990296, etc. The index rotational lamination technique itself for squareness and thickness variation management is a well-known technique.

The present invention provides a core manufacturing apparatus and a core manufacturing method using the same capable of heating the lamina members together from the outside and the inside in order to bond the lamina members forming the core of the laminated structure by an adhesive method. There is a purpose.

One aspect of the present invention is a core manufacturing apparatus for forming a laminated core by integrating a plurality of lamina members by an adhesive method: having a lamination hole formed through in the vertical direction so as to pass the lamina members in a laminated state, A laminator including a first heater for heating the lamina members passing through the lamination hole from the outside of the lamina members so that the lamina members are integrated by the adhesive present at the interface of the lamina members (Limanator); a core support movably provided at a lower side of the laminated hole to support the laminated core discharged from the laminated hole; And a second heater capable of entering the inside of the lamination hole through the lower end of the lamination hole and moving vertically through the core support to heat the lamina members inside the lamina members Core manufacturing apparatus including provides

The core support may generate heat for heating the lamina members. Also, the second heater may be an inner guide that is inserted into the laminar members to align the lamina members.

The second heater; When the lamina members into which the second heater is inserted rotate, it is possible to rotate at the same angle together with the lamina members into which the second heater is inserted in order to induce an integral behavior of the lamina members, forming the laminated cores Slip can be prevented from occurring at the adhesive interface of the lamina members.

The upper end of the second heater may descend below the upper surface of the core support, and thus, when the core is taken out, interference by the second heater may be excluded and the descending height of the core support may be minimized.

More specifically, the upper end of the second heater is capable of rising to a height equal to or higher than the height of the upper end of the heater; A core engaging portion may be formed on an outer circumferential surface of the second heater so that the second heater catches the lamina members in a rotational direction; The core engaging portion may be engaged with grooves or protrusions formed on the inner circumferential surfaces of the lamina members.

The second heater; It can move up and down independently with respect to the core support.

Another aspect of the present invention is a core manufacturing method for forming a laminated core by integrating a plurality of lamina members by an adhesive method: the lamina members pass through in a laminated state to the adhesive present at the interface of the lamina members Heating the lamina members with a first heater and a second heater for heating the lamina members from outside and inside of the lamina members, respectively, so as to be integrated by; And to take out the laminated core, it provides a core manufacturing method comprising the step of lowering the upper end of the second heater for heating the lamina member below the upper end of the core support supporting the bottom surface of the laminated core.

According to the core manufacturing apparatus and manufacturing method according to the present invention has the following effects.

First, according to the present invention, it is possible to minimize/prevent the occurrence of temperature deviation and adhesive strength deviation for heat curing of adhesive from the edge of the lamina members forming the laminated core to the inside, and Warpage and defects of the laminated core can be minimized/prevented.

Second, according to the present invention, the progress of an additional core heating process to improve warpage of the laminated core and the resulting additional production cost can be prevented.

Thirdly, according to the present invention, since the bottom of the laminated core can be heated while applying back pressure to the laminated core during extraction of the laminated core, the phenomenon of warping on the bottom surface of the laminated core can be minimized/prevented. .

Fourth, according to the present invention, since the lamina members forming the laminated core move integrally without relative movement to each other inside the laminated hole, the straightness of the lamina members can be stably managed, and the rotational lamination of the lamina members (index lamination), the perpendicularity of the laminated cores can be precisely managed and the occurrence of thickness deviation can be minimized.

Fifth, according to the present invention, since the relative rotation (slip phenomenon) between the lamina members can be prevented at the interface between the lamina members during index rotation of the lamina members, the adhesive present between the layers of the lamina members When the laminated core is formed through heat curing of the lamina member integrity can be strengthened and the interfacial split phenomenon can be prevented.

Sixth, according to the present invention, since the integrated behavior of the lamina members is implemented based on the center hole of the lamina members forming the shaft hole (inner diameter) of the laminated core, a separate structure for guiding the movement of the lamina members is formed. There is no need to do this, and since grooves and/or protrusions formed on the inner circumferential surface (periphery of the center hole) of the lamina members can be set as a standard for the integral behavior of the lamina members in order to firmly couple the axis to the laminated core, the appearance of the finished product It is possible to precisely implement all the behaviors (rotational motion, straight motion) of the laminar member without being limited by.

The features and advantages of the present invention may be better understood with reference to the following drawings in conjunction with the detailed description of embodiments of the present invention, of which:

1 is a view schematically showing an embodiment of a core manufacturing apparatus according to the present invention;

FIG. 2 is a diagram illustrating a structure in which the device shown in FIG. 1 is applied to a progressive mold type device;

Figure 3 is a view illustrating a method for manufacturing a laminated core by the apparatus shown in Figure 2;

FIG. 4 is a diagram illustrating an elevating structure of a core support and a second heater of the device shown in FIG. 1;

5 is diagrams illustrating a second heater applicable to the device shown in FIG. 1;

6 is a view illustrating a core support applicable to the device shown in FIG. 1;

7 is a plan view showing a state in which an embodiment of the second heater shown in FIG. 4 is inserted into an example of a lamina member; and

8 to 10 are diagrams illustrating the operation of the device shown in FIG.

Hereinafter, preferred embodiments of the present invention in which the object of the present invention can be realized in detail will be described with reference to the accompanying drawings. In describing the present embodiment, the same name and the same reference numeral are used for the same configuration, and additional description thereof will be omitted below.

Terms used in this specification are used to describe embodiments of the present invention, and are not intended to limit the present invention, and terms including ordinal numbers such as “first” and “second” constitute the same name. When describing elements, they may be used to distinguish them from each other, but do not define or limit the number of elements.

And when a component is said to be "connected" or "connected" to another component, it may be directly connected or connected to the other component, but a connection with another component in the middle. It should be understood that a relationship, that is, a relationship that is indirectly connected is also included.

In this specification, terms such as "include" or "have" mean that features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist, and that one or more other features are present. However, it should be understood that the existence of numbers, steps, operations, components, parts, or combinations thereof, i.e., the possibility of addition is not excluded.

First, an apparatus for manufacturing an adhesive laminated core according to an embodiment of the present invention will be described with reference to FIGS. 1 to 4. 1 is a view schematically showing an embodiment of a core manufacturing apparatus according to the present invention, FIG. 2 is a view illustrating a structure in which the apparatus shown in FIG. 1 is applied to a progressive mold type apparatus, and FIG. 3 is FIG. 2 , FIG. 4 is a diagram illustrating a lifting structure of a core support and a second heater of the device shown in FIG. 1 .

1 to 4, the core manufacturing apparatus according to an embodiment of the present invention is a device for forming a laminated core by integrating a plurality of lamina members (L) by a heat bonding method.

The core manufacturing apparatus according to an embodiment of the present invention includes a first heater 110 for externally heating the lamina members (L) and a laminator (100; Laminator) in which the lamina members (L) are laminated. And, a core support 210 supporting the laminated core C discharged from the laminator 100, and a second heater 310 for heating the lamina members L from the inside of the lamina members L ).

The laminator 100 has a lamination hole 100a formed through in the vertical direction so as to pass the lamina members L in a laminated state. And the first heater 110, the lamina members passing through the lamination hole (100a) so that the lamina members are integrated in an adhesive method by the adhesive present at the interface of the lamina members, the lamina members It is a component that heats them from the outside.

The core support 210 is movably provided on the lower side of the stacking hole 100a to support the stacked core C discharged from the stacking hole 100a, and the second heater 210 ) is capable of entering the inside of the lamination hole 100a through the lower end of the lamination hole 100a to heat the lamina members L from the inside of the lamina members L, and the core support ( 210) is a component that can be moved in the vertical direction through

Therefore, the first heater 110 performs heating on the lamina members at the periphery of the lamina members, and the second heater 210 is inserted into the lamina members to perform heating on the lamina members. Since the heating is performed on the lamina member, it is possible to reduce the occurrence of temperature deviation from the edge portion to the center portion of the lamina member.

In addition, the core support 210 may be made of a configuration capable of generating heat for heating the lamina members (L). For example, the core support 210 may include a heat source capable of heating the bottom surface of the laminated core (C).

To describe this embodiment in more detail, the lamina members (L) put into the laminator 100 are heated while passing through the lamination hole 100a in a laminated state, and a plurality of lamina members (L) The laminated core (C) is formed by being integrated by a heat bonding method.

In this embodiment, the lamina members injected from the upper side of the laminator 100 are heated while passing through the lamination hole 100a in a laminated state, and a plurality of lamina members are heated and cured by the adhesive present at the interface of the lamina members. The lamina members of the intestine are integrated to form the laminated core (C).

As described above, the stacking hole 100a may be formed through the laminator 100 in the vertical direction as in the present embodiment. In addition, the lamina members (L) passing through the stacking hole (100a) from top to bottom are integrated one by one by an adhesive method, thereby sequentially forming the stacked cores (C).

Further, the core support 210 is provided movably on the lower side of the laminator 100 so as to sequentially support the laminated cores C discharged from the laminator 100 .

More specifically, the core support 210 moves upward toward the laminator 100 to support the bottom surface of the laminated core C discharged from the laminator 100, and the laminated core C descend while supporting Then, after one laminated core is taken out, it rises again to support the bottom of the next laminated core.

Next, the second heater 310 can rise through the core support 210 and protrude upward from the core support 210, and is inserted into the lamina members L so that the lamina The members are heated from the inside.

In this embodiment, the second heater 310 is provided to be able to move up and down on the core support 200, and enters the inside (lamination hole) of the laminator 100 through the lower end (exit) of the laminator 100. Enter to a predetermined height. The lifting stroke of the second heater 310 may be adjusted.

Also, the second heater 310 may be an alignment guide, that is, an inner guide, which is inserted into the lamina members L to align the lamina members.

In other words, the second heater 310 induces coaxial alignment while the lamina members pass through the lamination hole 100a while forming the laminated core, and furthermore, the lamina members L are integrated. Relative movement between the laminar members (L) by inducing behavior, for example, relative rotation may be prevented.

And in this embodiment, the core support 210 supports the bottom surface (bottom surface) of each laminated core discharged from the stacking hole, and is connected to a lifter 220 that lifts the core support 210 . The second heater 310 is also connected to a lifter 320 that moves the second heater 310 up and down, and can move up and down through the core support 210 .

Hereinafter, the lifter 220 that lifts the core support 210 is referred to as a first lifter, and the lifter 320 that lifts the second heater 310 is referred to as a second lifter.

As described above, the core support 210 is the lower side of the laminator 100 in order to sequentially support the laminated cores C sequentially discharged from the laminator 100, particularly the laminated hole 100a. It is provided so that it can be lifted on. In addition, the first lifter 220 is connected to the core support 210 to move the core support 210 up and down, supports the core support 210, for example, a plate for core support, and lifts the core support 210. It is a component that

The first lifter 220 may include, but is not limited to, a telescopic cylinder such as a hydraulic or pneumatic cylinder, and for example, an electric actuator using a device such as a linear motor that implements a linear motion. Various devices capable of realizing elevation of the core support may be applied as the first lifter 220 .

In addition, the core support 210 may be rotatably provided on top of the first lifter 220, and the lamina members (L) may be provided to manage the perpendicularity and thickness deviation of the laminated cores (C). When index rotates by the laminator 100, it can rotate together with the laminated core C while supporting the underside (bottom surface) of the laminated core discharged from the laminator 100.

As a more specific example, the core support 210 is rotatably installed on the top of the first lifter 220 . For example, a bearing 230 is installed on the upper side of the first lifter 220, and the core support 210 can rotate freely by the bearing 230, that is, it can be installed as a rotating material. there is.

In this embodiment, the first lifter 220 includes a first cylinder head 221 and an elastic first cylinder body 222, and the core support 210 is It is rotatably provided at the top by the bearing 230. Functions and types of cylinders and bearings are well known to those skilled in the art (hereinafter referred to as 'ordinary technicians'), so additional description thereof will be omitted.

The core support 210 descends while the laminated core C is seated on the upper side of the core support, and when the core support reaches the lower limit position, a core extractor (not shown) such as a conveyor By this, the laminated core can be taken out. After that, the core support 210 rises again to support the bottom surface of the laminated core discharged in the next order.

The core support and the first lifter are back pressure devices, and since the function of the core support itself and the take-out mechanism of the laminated core are known in the field of core manufacturing technology, additional description thereof will be omitted.

And, the second heater 310 is provided to be able to move up and down on the lower side of the laminator 100 so as to be able to enter the lamination hole 100a, and the lamination reaches a predetermined height or less within the lamination hole 100a. It is inserted through the members (L).

That is, the second heater 310 is configured to enter the inside of the liner 100, and enters the inside of the laminator 100 to a predetermined height through the lower end of the laminator 100, that is, the lower end of the stacking hole. , It performs a heating function while being inserted into the lamina members (L) located below a predetermined height, and furthermore, as an internal guide, the lamina members supplied through the upper end (inlet) of the laminator 100 act integrally as a whole. induce

The second lifter 320 is configured to support the second heater 310 in order to move the second heater 310 up and down, and is connected to the second heater 310 to lift the second heater 310. moves up and down.

The second lifter 320 may also include a telescopic cylinder such as a hydraulic or pneumatic cylinder, but is not limited thereto, and for example, the core guide, such as an electric actuator using a linear motor, etc. A variety of devices that can implement the lifting of can be applied to the second lifter (320).

More specifically, the second heater 310 descends through the core support 210 to take out the laminated core C, and when the core support 210 reaches the lower limit, the second The upper end of the heater is lowered by the second lifter 320 so as to be located at a level lower than the upper end surface of the core support 210 .

Then, when the laminated core (C) leaves the core support 210, the second heater 310 enters the laminated hole 100a again, and the upper end of the second heater 310 is the laminator ( 100) It can rise to a predetermined height inside and perform a heating function inside the laminar members below a certain height.

In this embodiment, the second heater 310 passes through the core support 210 and moves in the vertical direction, and in the center of the core support 210, there is a floor hole for lifting the second heater 310 ( Hole) is formed through in the vertical direction. That is, as in the examples shown in FIGS. 8 to 10 , the second heater 310 passes through the core support 210 and moves up and down by the second lifter 320 .

More specifically, the second heater 310 is provided to be able to move up and down inside the core support 210, and the second heater 310 is moved by the second lifter 320 to the core support 210. ) can rise above. Therefore, in this embodiment, the second heater 310 has a structure capable of relative vertical movement with respect to the core support 210, and the protruding height of the second heater 310 from the upper side of the core support 210 may be adjusted.

The second heater 310 may be rotatably provided above the second lifter 320 . When the lamina members (L) are index-rotated by the laminator 100 to manage the perpendicularity and thickness deviation of the laminated cores (C), the second heater 310 operates on the lamina inside the laminated hole. It can rotate with members.

As a more specific example, the second heater 310 is rotatably installed on the top of the second lifter 320 . For example, a bearing 330 is installed on the upper side of the second lifter 320, and the second heater 310 can freely rotate by the bearing 330, that is, it is installed as a rotating material. can

In this embodiment, the bearing 230 supporting rotation of the core support 210 and the bearing 330 supporting rotation of the second heater 310 are separately installed. In the present specification, the bearing 230 supporting rotation of the core support 210 is referred to as a first bearing, and the bearing 330 supporting rotation of the second heater 310 is referred to as a second bearing.

Therefore, in this embodiment, the core support 210 and the second heater 310 have a structure capable of mutually independent rotation. However, when the lamina members (L) are index-rotated by the laminator 100, the core support 210 and the second heater 310 rotate at the same angle at the same time, so that the second heater is inserted into the lamina member Integral rotation of the laminar members and other laminar members stacked thereon is made.

In this embodiment, the second lifter 320 includes a second cylinder head 321 supporting the second heater and a second cylinder body 322 lifting the second cylinder head. The second heater 310 is rotatably provided at an upper end of the second cylinder head 321 by the second bearing 330 .

For example, as described above, the second heater 310 moves up and down through the core support 210, and the second cylinder body 322 is shown in FIGS. 8 to 10 As in the example, the first cylinder body 222 may be a lifting structure provided to be drawn in and out in the vertical direction. Accordingly, a structure in which the second lifter is combined with the first lifter may be used. For example, the core support and the second heater may be moved up and down by a plurality of cylinders or, more specifically, two or more cylinders. Of course, the core support and the second heater may be driven by separate lifting devices.

Referring to FIGS. 5 and 6 , the second heater 310 may include

heat sources

310a and 310b for internally heating the lamina members. The

heat sources

310a and 310b are devices that convert electrical energy into thermal energy, for example, as shown in FIG. It may include, but is not limited to, an induction heater such as an electric heating wire supplied or a high-frequency induction heating method. For example, the heat source may include a flow path through which a high-temperature fluid flows, and the heat source may have various shapes and methods. can be changed to

The second heater 310 may include through holes 311a formed in the body 311 of the second heater to emit heat. As a more specific example, through holes 311a through which hot air is discharged may be formed in the body 311 of the second heater. In addition, a blower 311b for forced release of heat may be provided inside the body 311 of the second heater, and a heat source 310b for generating heat, for example, an electrothermal heating element may be provided. Of course, the second heater 310 may be in the form of dissipating hot air introduced from the outside.

And, as described above, the core support 210 may include a heat source 210a for heating the bottom surface of the laminated core. The heat source 210a of the core support is a device that converts electrical energy into thermal energy, for example, as shown in FIG. 6, provided on the body 311 of the second heater and supplied with current by a power line L It may include an induction heater such as an electric heating wire or a high frequency induction heating method. Of course, the heat source 210a of the core support may also include a passage through which a high-temperature fluid flows, and the heat source 210a of the core support may also be changed in various forms or methods.

The heat source 210a of the core support and the heat sources 310a and 310c of the second heater may be supplied with current through the same power line L or may be supplied with power separately. In addition, since the electrical connection method between the stationary body and the rotating body, for example, the electrical connection method using a rotating electrode itself is a known technology, additional description thereof will be omitted.

The present invention may provide an embodiment of a core manufacturing method of forming a laminated core by integrating a plurality of lamina members by an adhesive method.

In one embodiment of the core manufacturing method, the lamina members are formed on the outside and inside of the lamina members, respectively, so that the lamina members are integrated by the adhesive present at the interface of the lamina members while passing in a laminated state. Step (a) of heating the laminar member with a first heater and a second heater to heat, and for taking out the laminated core, the upper end of the second heater for heating the lamina member is placed on the bottom of the laminated core. It may include a step (b) of lowering the surface below the top surface of the core support.

In the step (a), the core support and the second heater are raised to bring the core support into close contact with the lamina member forming the bottom of the laminated core, and the second heater is entered into the lamina members. includes

On the other hand, the second heater 310, when the lamina members into which the second heater 310 is inserted rotate at a predetermined angle by the laminator 100, the lamina member into which the second heater 310 is inserted. It rotates at the same angle with the lamina members, and prevents slip generation, that is, relative rotation between the lamina members at the adhesive interface of the lamina members.

In this embodiment, the second heater 310 is inserted into a hole penetrating the lamina member. When the lamina members are combined into a laminated structure by the laminator to form the above-described laminated cores (C), axially penetrating holes, that is, shaft holes, are formed in the center of the laminated cores (C), and the second heater 310 is inserted into the shaft hole of the laminated core discharged from the laminator.

The second heater 310 is caught in the center hole H of the lamina members in the rotational direction of the lamina members to receive rotational force, and as a reaction thereto, the integral behavior of the lamina members, more specifically, the integral rotation can be implemented.

More specifically, the second heater 310 is a core engaging portion formed on the outer circumferential surface of the core guide 310 so as to be caught in the center hole H of the lamina members L in the rotation direction ( 312).

The core engaging portion 312 is engaged with the grooves or protrusions formed on the inner circumferential surfaces of the lamina members, that is, on the rim of the aforementioned center hole. For example, when manufacturing a laminated core (rotor core) having a structure in which a shaft is coupled to a hole (shaft hole) formed in the center, a groove for preventing relative rotation between the shaft and the laminated core is formed in the shaft hole of the laminated core. And / or protrusions are formed, and grooves or protrusions of the same shape are formed in the center hole of the lamina member for manufacturing the laminated core of this structure. The core guide 310 of the core manufacturing apparatus according to the present embodiment is It has a core hooking part 311 of a shape corresponding to the groove and/or protrusion formed in the center hole of the member, that is, of an engaging shape.

As a more specific example, as in the example shown in FIG. 7, in the case of a structure in which a protrusion P is formed in the center hole of the lamina member L, the outer circumferential surface of the core guide 310 has a groove-shaped core. The hooking portion 312 is formed long in the vertical direction.

In addition, in the case of a laminated core manufacturing method, that is, index rotation lamination, in which a new lamina member is laminated while integrally rotating the lamina members by a predetermined angle with respect to the axis of the laminate at a predetermined timing, the lamina member Protrusions P may be formed at equal angular intervals in the center hole of (L).

For example, when protrusions of the same shape are formed in the center hole of the lamina member at an angle of 90 degrees, the laminator 100 rotates the lamina members L at 90 degrees or 180 degrees to perform index rotational lamination. can be done Although not shown, a structure such as a magnet hole for inserting a magnet may be formed in an outer region of the central hole of the lamina member. The lamina member shown in FIG. 7 is an example in which two protrusions P are formed symmetrically with each other at an interval of 180 degrees in a center hole, and a rotation angle of 180 degrees for index rotation lamination may be applied.

In this embodiment, the second heater 310 has a shape corresponding to the center hole of the lamina member, that is, a cylindrical shape, and at least one core engaging part 312 is provided on the outer circumferential surface of the second heater 310 in upper and lower directions. It is formed long in the direction, but the shape of the core guide can be changed to match the shape of the laminated core.

And in this embodiment, the second heater 310 is a component capable of independent vertical movement and rotational movement with respect to the core support 210, at least one for coupling the axis to the center hole of the lamina member When the groove is formed, the core holding portion may be implemented in a protrusion shape formed long along the vertical direction on the outer circumferential surface of the core guide.

For example, after both the core support 210 and the second heater 310 are raised to the upper limit, when the core support 210 is lowered again, the second heater 310 remains at the upper limit height Internal heating and integral motion (integral rotation) of the lamina members on the upper side of the core support may be implemented while being In addition, since the core support 210 and the second heater 310 are rotatably supported by separate bearings, that is, the first bearing 230 and the second bearing 330, mutually independent rotation is possible. However, in this embodiment, when the lamina members (L) rotate, the core support 210 and the second heater 310 simultaneously rotate at the same angle and perform their respective functions.

The present embodiment is an apparatus for manufacturing an adhesive laminated core, that is, an apparatus for manufacturing a core of a laminated structure by combining the boundary surfaces of lamina members with an adhesive material (adhesive), for curing the adhesive material (adhesive) by heat, that is, heat curing. The laminator 100 includes the aforementioned first heater 110 (Heater). That is, the first heater 110 has a heat source for externally heating the lamina members for curing of the adhesive present in the adhesive interface of the lamina members (L).

And the upper end of the second heater 310 is preferably able to rise from the height of the upper end of the first heater 110 to a section below the upper end of the laminator. In this embodiment, the second heater 310 It rises to a height higher than the upper end of the first heater 110 (the inlet of the first heater) to guide the movement of the lamina members (L).

As described above, the core manufacturing apparatus according to the present embodiment forms a laminated core (C) by integrating the lamina members (L) passing through the lamination hole by an adhesive method by a predetermined number, and the lamina member ( L) may be formed by blanking in a progressive mold device.

Referring to FIGS. 1 to 3 , the laminator 100 may be applied to a progressive mold device, and more specifically, may be provided below the blanking unit 400 .

And the laminator 100 has an internal space for aligning and lamination and integration of the lamina members (L), that is, the above-described laminating hole (100a; Laminating Hole), and sequentially in the laminating hole (100a) by blanking of the material. The laminar members (L) continuously supplied to are stacked in a vertically aligned state.

The laminator 100 sequentially discharges the laminated structure, that is, the laminated cores C, which are continuously formed by integrating the lamina members L. Therefore, the upper end of the laminator 100 becomes the inlet of the lamina member and the lower end of the laminator becomes the outlet of the laminated core C.

The blanking unit 400 is a device for blanking a material for the manufacture of the lamina members (L), for example, a metal strip (S) such as an electrical steel sheet is punched out to sequentially form the lamina members (L). Forming, the lamina member (L) formed at the same time as the punching (blanking) of the material is pushed into the inside of the laminator 100, that is, the lamination hole 100a.

Therefore, whenever the metal strip (S) is blanked, the lamina members inside the laminator 100 are pushed and moved downward by one pitch as much as the thickness of the metal strip (S).

As in the present embodiment, the laminator 100 includes the first heater 110 for heating and curing the adhesive, a squeeze mechanism 120 for inducing alignment/lamination of the laminar members, and the laminated core. (C) may include a pinch mechanism (130; Pincher) for preventing the fall.

The squeeze mechanism 120 has a structure through which the lamina members L manufactured by the blanking unit 400 pass through in a forcibly fitted state (press-fitting state) in the vertical direction. More specifically, the squeeze mechanism 120 stacks and lowers the lamina members L so that the lamina members L are stacked in a coaxially aligned state in the upper section of the laminator 100. guide the movement The squeeze mechanism 120 may include at least one hollow squeeze member that penetrates in the vertical direction, that is, a squeeze ring.

And, the pinch mechanism 130 is configured to pass the laminated core (C) in the lower section of the laminator 100, and is provided below the squeeze mechanism 120, and the laminated core (C) A tubular mechanism that is elastically expandable to press the circumference and has a restoring force, or a mechanism that presses the outer circumference of the laminated core by using the elastic force of a spring may be used.

An external guide 140 for guiding the lamina members (L) may be provided between the squeeze mechanism 120 and the pinch mechanism 130. In this embodiment, the heater 110 is provided in a region between the squeeze mechanism and the pinch mechanism 130, and the outer guide 140 has a cylindrical shape penetrating the inside of the first heater 110 in a vertical direction. can be provided in

And the lamina members passing through the inside of the first heater 110 are heated by the first heater 110. For example, a high-frequency induction heating device may be applied as the first heater 110, but the type of the first heater is not limited thereto, and other types of heaters such as an electric resistance heating wire, that is, a heating wire structure, are natural. The outer guide 140 may be made of a non-conductive material so as not to be affected by high-frequency induction heating.

The pinch mechanism 130 forms a movement passage for the laminated core C in the lower region of the first heater 110, and more specifically, lamina members by a predetermined number than the lamina members L. It is a mechanism for holding the laminated core with a predetermined force by pressing the circumference of the laminated core (C) formed by interlayer bonding of (L), that is, a mechanism for applying lateral pressure. Therefore, the pinch mechanism 130 can prevent the laminated core discharged from the laminator 100 from falling down before being supported by the core support 210 .

Further, the blanking unit 400 includes a blanking punch 410 provided with an upper mold 10 capable of moving up and down, and a blanking die 420 provided below the upper mold 10 . The blanking die 420 is provided directly above the laminator 100 . For example, the blanking die 420 may be provided on the upper side of the squeeze mechanism 120 coaxially with the squeeze mechanism.

Examples of laminators applicable to progressive molds are disclosed in a number of patent documents including Patent Documents 1 to 5 described in the prior art documents of this specification, and components such as the first heater, squeeze mechanism, and pinch mechanism are also patented. Since it is exemplified in various patent documents including Document 5 (Patent Registration No. 10-1876292), additional description of these configurations is omitted.

As described above, the core manufacturing apparatus according to the present embodiment, in order to form the above-described laminated core (C) by integrating the lamina members (L) by a predetermined number, between the layers of the lamina members (L) Cures the existing adhesive. More specifically, the adhesive present between the layers of the lamina members (L) is the above-described laminator 100, particularly the first heater 110 and the second heater 310, further by the core support 210 It is possible to stably realize the integration of lamina members while curing evenly.

An adhesive for interlayer adhesion may be applied by an adhesive applicator to the material S passing between the upper mold 10 and the lower mold 20 of the laminated core manufacturing apparatus, or the material already coated with the adhesive, that is, the adhesive coating layer ( The material S having S1 and S2 may be supplied between the upper mold 10 and the lower mold 20. A technology of manufacturing an adhesive laminated core by applying an adhesive to the surface of a material, that is, a metal strip, and punching out the metal strip, and a technology of manufacturing an adhesive laminated core by receiving and punching a metal strip already coated with an adhesive are those skilled in the art. Since it is a well-known technique, additional description thereof is omitted.

A cooling system for cooling the laminator 100 and its surroundings may be applied to the lower mold 20, and a heat insulating member may be applied between components forming the laminator 100 to block heat conduction. there is.

In addition, the upper mold 10 may further include at least one punch 11 for forming a predetermined slot or hole (for example, the center hole of the lamina member described above) in the lamina member L, , The upper side of the lower mold 20 may be provided with a die hole 21 facing the punch 11 described above. In the progressive mold device for manufacturing laminated cores, examples of molding devices provided to the upper and lower molds for processing the shape of laminar members are variously known, so additional description is omitted.

In FIG. 3, the laminar members (L) stacked up and down inside the laminator 100 are separated based on a solid line, and the boundary surface indicated by the dotted line illustrates a portion (adhesive interface) where interlayer adhesion is made.

The laminator 100 may rotate the lamina members by a predetermined angle for the aforementioned index rotation lamination. For example, the squeeze mechanism 120 and the pinch mechanism 130 may rotate simultaneously at the same angular velocity.

The squeeze mechanism 120 is fixed inside the hollow rotary die 150 capable of rotating in place and rotates integrally with the rotary die 150 . In this embodiment, the blanking die 420 is also provided on the rotating die and rotates together with the squeeze mechanism 120 . And, the pinch mechanism 130 also rotates simultaneously at the same angle as the squeeze mechanism in place.

The squeeze mechanism 120 and the pinch mechanism 130 are rotated by a rotary actuator, and may rotate by, for example, a gear transmission mechanism. For gear transmission, the rotary die 150 is connected to the first gear 510 rotated by the motor M to receive rotational force, and the pinch mechanism 130 is also connected to the second gear 520. It can be connected and rotated. A ring gear 151 meshing with the first gear may be installed on the rotating die 150 .

Of course, the rotation mechanism of the squeeze mechanism 120 and the pinch mechanism 130 is not limited to the gear transmission method, and may be variously changed, such as a belt transmission method, for example. The rotating die 150 and the pinch 130 are rotatably installed on the lower die by bearings.

In this embodiment, the external guide 140 follows the squeeze mechanism 120 and the pinch mechanism 130 to rotate together, and the first heater 110 does not rotate. And, the rotational force of the squeeze mechanism 120 and the pinch mechanism 130 is transmitted to the core guide 310 through the lamina members L, and the lamina member into which the core guide 310 is inserted. Since they are caught on the core guide 310 in the rotational direction to ensure rotational integrity, the interfacial slip phenomenon of the lamina members can be prevented.

Of course, the first heater 110, the squeeze mechanism 120, and the pinch mechanism 130 may all be installed inside the rotating die and rotate simultaneously with the core guide 310 described above.

On the other hand, in order to connect the core support 210 and the pinch mechanism 130, at least one connection pin 610 is provided in any one of the core support 210 and the pinch mechanism 130, and the other A pin hole 620 into which the connecting pin 610 is inserted may be formed in one.

In this embodiment, the connection pin 610 is provided in the core support 210, the pin hole 620 is formed in the pinch mechanism 130, and the connection pin 610 is in the pin hole 620. By being inserted, the core support 210 and the pinch mechanism 130 are coupled. Therefore, the core support 210 and the pinch mechanism 130 are rotated by the connecting pin 610 and the pin hole 620 Integrity can be strengthened.

Hereinafter, a process of manufacturing a laminated core by the above-described core manufacturing apparatus with reference to FIGS. 8 to 10 will be described.

As shown in FIG. 8 , the core support 210 is raised by the first cylinder body 222 and supports the lower surface of the laminated core C to be taken out through the lower end of the laminator 100 . And the second heater 310 enters the inside of the stacking hole 100a through the lower end of the laminator 100 and forms holes of the lamina members L having a predetermined height or less, for example, the center hole H is inserted into At this time, the core hooking part 312 of the second heater is fitted into and engaged with grooves or protrusions formed in the center holes of the lamina members.

In this embodiment, the second heater 310 rises to the inlet (top) of the first heater 110 or the bottom of the squeeze mechanism 120, internal heating for the lamina members (L), Furthermore, the integral behavior of the laminar members (L) is implemented. The core support 210 and the second heater 310 may rise together, or one may rise first and then the other.

After the core support 210 and the second heater 310 rise to a predetermined height (upper limit), as shown in the example shown in FIG. 9, the core support 210 by the downward movement of the lamina members (L) ) rotates together with the laminated core (C) on the core support 210 while descending stepwise by a height corresponding to the thickness of one lamina member, for example, 1 pitch, and the second heater 310 The integral rotation of the lamina members (L) is induced while maintaining a relative height to the first heater.

And when the upper end of the laminated core (C) on the core support 210 comes out from the lower end (exit) of the laminator 100, that is, under the lamination hole, as shown in FIG. 10, the core support 210 and the second heater 310 also descends. At this time, the height of the upper end of the second heater 310 is lowered to a height lower than the upper side of the core support 210, so that the laminated core C on the core support 210 is not interfered with when taking out .

Although not shown, the operation of the core support 210 and the second heater 310, more specifically, the operation of the first lifter and the second lifter may be controlled by a control unit wired or wirelessly.

As described above, the embodiments according to the present invention have been reviewed, and the fact that the present invention can be embodied in other specific forms in addition to the above-described embodiments without departing from the spirit or scope is apparent to those skilled in the art. It is self-evident to

Therefore, the foregoing embodiments should be regarded as illustrative rather than restrictive, and thus the present invention is not limited to the foregoing description and may be modified within the scope of the appended claims and their equivalents.

The present invention relates to a core manufacturing apparatus, and can be used in the field of manufacturing various types of cores, such as cores for rotors and stators. there is.

Claims

As a core manufacturing device for forming a laminated core by integrating a plurality of laminar members by a heat bonding method:

It has a lamination hole formed in the vertical direction to pass the lamina members in a laminated state, and the lamina member passes through the lamination hole so that the lamina members are integrated by an adhesive present at the interface of the lamina members. A laminator (Limanator) including a first heater for heating the outside of the lamina members;

a core support movably provided at a lower side of the laminated hole to support the laminated core discharged from the laminated hole; and

Core manufacturing apparatus including a second heater capable of entering the inside of the lamination hole through the lower end of the lamination hole and movable in the vertical direction through the core support to heat the lamina members inside the lamina members.
According to claim 1,

The core support is a core manufacturing apparatus, characterized in that capable of generating heat for heating the laminar members.
According to claim 1,

The second heater, adhesive core manufacturing apparatus, characterized in that the inner guide is inserted into the laminar members to align the laminar members.
According to claim 3,

The second heater; When the lamina members into which the second heater is inserted rotate, it is possible to rotate at the same angle together with the lamina members into which the second heater is inserted in order to induce an integral behavior of the lamina members, forming the laminated cores Adhesive core manufacturing apparatus, characterized in that to prevent the occurrence of slip (Slip) at the adhesive interface of the laminar members.
According to any one of claims 1 to 4,

Core manufacturing apparatus, characterized in that the upper end of the second heater is descendable below the upper end surface of the core support.
According to claim 5,

The upper end of the second heater is capable of rising to a height equal to or higher than the height of the upper end of the heater; In the second heater, a core engaging portion is formed so that the lamina members are caught in a rotational direction; The core engaging portion, core manufacturing apparatus, characterized in that engaged with the grooves or projections formed on the inner circumferential surface of the lamina members.
According to claim 1,

The second heater; Self-adhesive laminated core manufacturing apparatus, characterized in that independent vertical movement with respect to the core support.
As a core manufacturing method for forming a laminated core by integrating a plurality of lamina members by an adhesive method:

A first heater and a second heater for heating the lamina members from the outside and inside of the lamina members, respectively, so that the lamina members pass through in a stacked state and are integrated by the adhesive present at the interface of the lamina members. heating the lamina member; and

And lowering an upper end of a second heater for heating the laminar member below an upper end surface of a core support supporting a bottom surface of the laminated core in order to take out the laminated core.