KR20230150234A - Apparatus And Method For Manufacturing Core - Google Patents

Abstract

The present invention discloses a core manufacturing apparatus and manufacturing method for forming a laminated core by integrating a plurality of laminar members through an adhesive method. The core manufacturing apparatus according to the present invention: has a stacking hole formed through the lamina members in the vertical direction to pass through them in a stacked state, and allows the lamina members to be integrated by an adhesive present at the interface of the lamina members. A laminator including a first heater that heats the laminar members passing through the stacking hole from the outside of the laminar members; A core support provided on the lower side of the stacking hole to be capable of being raised and lowered to support the stacked core discharged from the stacking hole; And a second heater that can enter the inside of the stacking hole through the bottom of the stacking hole to heat the lamina members inside the lamina members and that can move in the up and down direction through the core support. According to the present invention, since the lamina members are heated from the outside and the inside, the curing of the adhesive can proceed more evenly and the interlayer bonding between the lamina members can be stably achieved.

Description

Core manufacturing device and manufacturing method {Apparatus And Method For Manufacturing Core}

The present invention relates to a core manufacturing apparatus and manufacturing method for manufacturing an iron core of a laminated structure by an adhesive method, and more specifically, to adhesively bond the interfaces of laminated laminar members for the iron core. It relates to a core manufacturing apparatus and manufacturing method for manufacturing a core with a laminated structure (laminated core).

In general, a laminated core refers to a core with a laminated structure manufactured by integrating multiple thin plates (laminar members), for example, multiple laminates obtained by punching a metal strip. It refers to a core structure in which members are integrated into a laminated structure.

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

As a representative method, lamina members of a predetermined shape are continuously molded and stacked using a progressive mold device, and a plurality of lamina members are bonded layer by layer, thereby producing a core of a laminated structure, that is, the laminated core described above. It can be.

Known methods for integrating the lamina members include a tab fixation method using interlock tabs, a welding fixation method using welding, for example, laser welding, and a rivet fixation method.

Examples of the tab fixing method are disclosed in patent documents such as Korean Patent Publication Nos. 10-2008-0067426 and 10-2008-0067428, but there is an iron loss problem and interlocking occurs as the material, that is, the steel plate, becomes thinner. There are limits to embossing processing to form tabs.

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

In addition, the invention of manufacturing the above-described laminated core by receiving and punching a metal strip coated with adhesive is disclosed in Korean Patent 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 et al.

The conventional adhesive fixation method described above can reduce costs compared to laser welding, and the adhesive fixation method is known as a technology that can cope with thinning of steel sheets.

According to the above-described adhesive fixation method, the laminator members pass through the laminator, more specifically, the internal space (stacking hole) of the mold (lower mold) in a stacked state, and adhere to the interface (boundary surface) of the laminar members. Multiple sheets can be integrated into one piece.

The laminator includes a squeeze member (squeeze ring of Japanese Patent Laid-Open No. 2009-297758) for aligning/stacking the laminar members, and the laminator operates at a predetermined timing ( A method (index rotation lamination) in which new lamina members are supplied after rotating the lamina members by a predetermined angle (index rotation) at each Timing is used.

A laminated core manufacturing apparatus in which the lamina members rotate index is disclosed in Patent Registration Nos. 10-1876292, 10-1990291, and 10-1990296, and the laminated core The index rotation lamination technology itself for managing perpendicularity and thickness deviation is a known technology.

Registered Patent Publication No. 10-1990291, spray-type adhesive laminated core manufacturing device, registered on June 12, 2019 Registered Patent Publication No. 10-1638294, Heat-adhesive laminated core manufacturing device, registered on July 4, 2016 Registered Patent Publication No. 10-1990296, Adhesive laminated core manufacturing device with easy discharge of laminated cores, registered on June 12, 2019 Registered Patent Publication No. 10-1966656, Adhesive laminated core manufacturing device and adhesive laminated core manufacturing method, registered on April 2, 2019 Registered Patent Publication No. 10-1876292, Adhesive laminated core manufacturing device and core laminator for the same, registered on July 3, 2018 Registered Patent Publication No. 10-1236929, Rotation die unit preventing tilting and laminated core manufacturing device equipped with the same, registered on February 19, 2013

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

One form of the present invention is a core manufacturing apparatus that forms a laminated core by integrating a plurality of laminar members through an adhesive method, comprising: a lamination hole formed through a vertical direction to pass the lamina members in a laminated state; A laminator including a first heater that heats the lamina members passing through the stacking hole from the outside of the lamina members so that the lamina members are integrated by an adhesive present at the interface of the lamina members; A core support provided on the lower side of the stacking hole to be capable of being raised and lowered to support the stacked core discharged from the stacking hole; And a core manufacturing apparatus including a second heater that can enter the inside of the stacking hole through the bottom of the stacking hole and move in the vertical direction through the core support to heat the lamina members from the inside of the lamina members. provides.

The core support may be capable of generating heat to heat the lamina members. And the second heater may be inserted into the inside of the lamina members to serve as an internal guide for aligning the lamina members.

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

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

More specifically, the top of the second heater can rise to a height higher than the top of the heater; A core catching portion may be formed on the outer peripheral surface of the second heater so that the second heater is caught by the lamina members in a rotational direction; The core engaging portion may be engaged with grooves or protrusions formed on the inner peripheral surface of the lamina members.

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

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

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 deviations and adhesion strength deviations for heat curing of the adhesive from the edge portions of the lamina members forming the laminated core to the interior, and the occurrence of temperature deviations for each part can be prevented. The occurrence of warping and defects in the laminated core can be minimized/prevented.

Second, according to the present invention, the additional core heating process and the resulting additional production costs can be prevented in order to improve the occurrence of warping of the laminated core.

Third, according to the present invention, it is possible to heat the bottom of the laminated core while applying back pressure to the laminated core during extraction of the laminated core, so the phenomenon of bending 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 behave as one unit without relative movement to each other inside the lamination hole, the straightness of the lamina members can be stably managed, and the rotational lamination (index) of the lamina members Through 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, relative rotation (slip phenomenon) between the lamina members at the interface between the lamina members can be prevented when the index rotation of the lamina members, so the adhesive existing between the layers of the lamina members When forming a laminated core through heat hardening, the integrity of the lamina members can be strengthened and the interface splitting phenomenon can be prevented.

Sixth, according to the present invention, since the integrated behavior of the lamina members is implemented based on the central hole of the lamina member that forms the axial hole (inner diameter) of the laminated core, a separate structure is formed to guide the movement of the lamina members. There is no need to do so, and the grooves and/or protrusions formed on the inner peripheral surface (around the central hole) of the lamina members in order to firmly couple the axis to the laminated core can be set as a standard for the overall behavior of the lamina members, so the external appearance of the finished product It is possible to precisely implement all movements (rotational movement, straight movement) of the lamina member without being limited by this.

The features and advantages of the present invention can be better understood by referring to the drawings described below along with the detailed description of embodiments of the present invention described below, of which:
1 is a diagram schematically showing an embodiment of a core manufacturing apparatus according to the present invention;
Figure 2 is a diagram illustrating the structure of the device shown in Figure 1 applied to a progressive mold type device;
Figure 3 is a diagram illustrating a method of manufacturing a laminated core using the device shown in Figure 2;
Figure 4 is a diagram illustrating the lifting structure of the core support and the second heater of the device shown in Figure 1;
Figure 5 illustrates a second heater applicable to the device shown in Figure 1;
Figure 6 is a diagram illustrating a core support applicable to the device shown in Figure 1;
Figure 7 is a plan view showing an example of the second heater shown in Figure 4 inserted into an example of a lamina member; and
Figures 8 to 10 are diagrams illustrating the operation of the device shown in Figure 1.

Hereinafter, preferred embodiments of the present invention by which the object of the present invention can be realized in detail will be described with reference to the accompanying drawings. In describing this embodiment, the same names and the same symbols are used for the same components, and additional description accordingly is omitted below.

The 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 containing ordinal numbers such as “first” and “second” constitute the same name. It can be used to distinguish elements from each other when describing them, but does not define or limit the number of components.

And when a component is said to be "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but is a connection with another component in between. It should be understood that it also includes relationships, that is, relationships that are indirectly connected.

In this specification, terms such as “include” or “have” mean the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, and one or more other features. It should be understood that it does not exclude the possibility of addition, that is, the presence of numbers, steps, operations, components, parts, or combinations thereof.

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

Referring to Figures 1 to 4, a core manufacturing apparatus according to an embodiment of the present invention is an apparatus that forms a laminated core by integrating a plurality of lamina members (L) using 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) in which the lamina members (L) are stacked. and a core support 210 that supports the laminated core (C) discharged from the laminator 100, and a second heater 310 for heating the lamina members (L) inside the lamina members (L). ) includes.

The laminator 100 has a stacking hole (100a) formed through the laminar members (L) in the vertical direction to pass through them in a stacked state. And the first heater 110 connects the lamina members passing through the stacking hole 100a to the lamina members so that the lamina members are integrated in an adhesive manner by an adhesive present at the interface of the lamina members. These are components that are heated from the outside.

The core support 210 is provided to be able to be raised and lowered on the lower side of the stacking hole 100a in order 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 bottom of the lamination hole (100a) to heat the lamina members (L) inside the lamina members (L), and the core support ( 210) is a component that can move up and down.

Accordingly, the first heater 110 performs heating on the lamina members from the outside of the lamina members, and the second heater 210 is inserted into the inside of the lamina members to form the lamina members. Since heating is performed on the lamina member, the occurrence of temperature deviation from the edge to the center of the lamina member can be reduced.

Additionally, the core support 210 may be configured to generate heat to heat 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) inputted into the laminator 100 are heated while passing through the lamination hole (100a) in a stacked state, and a plurality of lamina members (L) are formed. The laminated core (C) is formed by being integrated using a heat bonding method.

In this embodiment, the laminar members introduced from the upper side of the laminator 100 are heated while passing through the stacking hole 100a in a stacked state, and a plurality of laminar members are formed by heat-curing the adhesive present at the interface of the laminator members. The lamina members of the sheet are integrated to form a laminated core (C).

As described above, the lamination hole 100a may be formed to penetrate the laminator 100 in the vertical direction as in this embodiment. In addition, the lamina members (L) passing from top to bottom through the lamination hole (100a) are integrated into a plurality of pieces by an adhesive method, thereby forming lamination cores (C) in succession and order.

And the core support 210 is provided to be movable on the lower side of the laminator 100 to sequentially support the laminated cores (C) discharged from the laminator 100.

To explain more specifically, the core support 210 moves upward toward the laminator 100 to support the bottom of the laminated core (C) discharged from the laminator 100, and the laminated core (C) Descend while supporting. And, 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 2l0 and protrude upward from the core support 210, and is inserted into the lamina members L to form the lamina. The members are heated internally.

In this embodiment, the second heater 310 is provided to be able to be raised and lowered on the core support 200, and flows into the inside (lamination hole) of the laminator 100 through the bottom (exit) of the laminator 100. Enter to the preset height. The lifting stroke of the second heater 310 may be adjusted.

And the second heater 310 may be inserted into the inside of the lamina members L and serve as an alignment guide, that is, an internal guide, for aligning the lamina members.

In other words, the second heater 310 induces coaxial alignment while the lamina members pass through the lamination hole 100a to form a lamination core, and further, the lamina members L are integrated. By inducing the behavior, relative movement, for example, relative rotation, between the lamina members (L) may be prevented.

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

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

As described above, the core support 210 is located on the lower side of the laminator 100 in order to sequentially support the laminator 100, especially the laminated cores C sequentially discharged from the lamination hole 100a. It is equipped to be lifted up and down. And the first lifter 220 is connected to the core support 210 to lift and lower the core support 210, and supports and lifts the core support 210, for example, a plate for core support. It is a component that is ordered.

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

In addition, the core support 210 may be rotatably provided on the upper part 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 the index is rotated by the laminator 100, it can rotate together with the laminated core (C) while supporting the bottom (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 may be installed on the upper side of the first lifter 220, and the core support 210 may be installed in a state in which it can rotate freely by the bearing 230, that is, in a rotatable state. there is.

In this embodiment, the first lifter 220 includes a first cylinder head 221 and an expandable first cylinder body 222, and the core support 210 is a part of the first cylinder head 221. It is provided to be rotatable by the bearing 130 at the top. Since the functions and types of cylinders and bearings are known to those skilled in the art (hereinafter referred to as 'ordinary technicians'), additional description thereof will be omitted.

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

The core support and the first lifter are back pressure devices, and the function of the core support itself and the extraction mechanism of the laminated core are known technologies in the field of core manufacturing technology, so additional description thereof is omitted.

In addition, the second heater 310 is provided to be lifted up and down on the lower side of the laminator 100 so that it can enter the stacking hole 100a, and the laminate that has reached a predetermined height or less inside the stacking hole 100a It is inserted through the members (L).

That is, the second heater 310 is configured to be able to enter the inside of the laminator 100, and enters the inside of the laminator 100 to a predetermined height through the bottom of the laminator 100, that is, the bottom of the stacking hole. , performs a heating function while being inserted into the lamina members (L) located below a predetermined height, and furthermore, serves as an internal guide so that the lamina members supplied through the top (entrance) of the laminator 100 operate as a whole. induce.

The second lifter 320 is a component that supports the second heater 310 in order to raise and lower the second heater 310, and is connected to the second heater 310 to lift the second heater 310. Move in the up and down direction.

The second lifter 320 may also include a telescoping cylinder such as a hydraulic or pneumatic cylinder, but is not limited thereto. For example, the core guide may include an electric actuator using a linear motor, etc. Various devices that can implement lifting and lowering can be applied as the second lifter 320.

To be more specific, the second heater 310 descends through the core support 210 to extract the laminated core (C), and when the core support 210 reaches its lower limit, the second heater 310 The top of the heater is lowered by the second lifter 320 so that it can be positioned at a height lower than the top surface of the core support 210.

Then, when the lamination core (C) leaves the core support 210, the second heater 310 enters the lamination hole 100a again, and the upper end of the second heater 310 is connected to the laminator ( 100) It is possible to perform a heating function inside lamina members below a certain height by rising to a preset height inside.

In this embodiment, the second heater 310 moves in the vertical direction through the core support 210, and at the center of the core support 210 is a bottom hole ( Hole) is formed through the hole in the vertical direction. That is, as in the example shown in FIGS. 8 to 10, the second heater 310 penetrates the core support 210 and moves in the vertical direction by the second lifter 320.

More specifically, the second heater 310 is provided to be capable of being raised and lowered inside the core support 210, and the second heater 310 is raised and lowered by the core support 210. ) can rise above. Therefore, in this embodiment, the second heater 310 has a structure capable of moving up and down relative 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 on top of 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 laminae inside the lamination hole. It can rotate together with the 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 be freely rotated by the bearing 330, that is, installed in a rotatable state. You can.

In this embodiment, the bearing 130 supporting the rotation of the core support 210 and the bearing 230 supporting the rotation of the second heater 310 are installed separately. In this specification, the bearing 130 that supports the rotation of the core support 210 is called a first bearing, and the bearing 330 that supports the rotation of the second heater 310 is called a second bearing.

Therefore, in this embodiment, the core support 210 and the second heater 310 have a structure that can rotate independently of each other. However, when the lamina members (L) rotate index by the laminator 100, the core support 210 and the second heater 310 rotate simultaneously at the same angle, so that the lamina member into which the second heater is inserted All rotation of the lamina members and other laminar members stacked on top of them occurs.

In this embodiment, the second lifter 320 includes a second cylinder head 321 that supports the second heater, and a second cylinder body 322 that elevates the second cylinder head. The second heater 310 is rotatably provided at the top of the second cylinder head 321 by the second bearing 330.

For example, as described above, the second heater 310 moves in the vertical direction through the core support 210, and the second cylinder body 322 is shown in FIGS. 8 to 10. As an example, the first cylinder body 222 may be provided with an elevating structure that can be drawn in and out in the vertical direction. Accordingly, the structure may be one in which the first lifter and the second lifter are combined. For example, the core support and the second heater may be lifted and lowered by a cylinder of two or more stages rather than a plurality of stages. Of course, the core support and the second heater may each 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, 310b) are devices that convert electrical energy into thermal energy, for example, as shown in (a) of FIG. 5, and are provided in the body 311 of the second heater and generate current by the power line (L). It may include, but is not limited to, an induction heater such as a supplied heating wire or a high-frequency induction heating method. For example, the heat source may include a flow path through which high-temperature fluid flows, and the form or method of the heat source may vary. may be changed.

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 that emit hot air may be formed in the body 311 of the second heater. And, inside the body 311 of the second heater, a blower 311b for forced release of heat may be provided, and a heat source 310b that generates heat, for example, an electric heating element, may be provided. Of course, the second heater 310 may be configured to emit hot air introduced from the outside.

And the core support 210 may include a heat source 210a for heating the bottom surface of the laminated core as described above. 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, is provided in the body 311 of the second heater and receives current through the 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 flow path through which 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. And since the electrical connection method between the fixed body and the rotating body, for example, the electrical connection method using a rotating electrode itself is a known technology, additional description thereof is omitted.

The present invention can provide an example of a core manufacturing method that forms a laminated core by integrating a plurality of laminar members through an adhesive method.

In one embodiment of the core manufacturing method, the lamina members are separated from the outside and inside of the lamina members, respectively, so that the lamina members pass in a stacked state and are integrated by an adhesive present at the interface of the lamina members. Step (a) of heating the lamina member with a first heater and a second heater for heating, and in order to take out the laminated core, the top of the second heater for heating the lamina member is placed at the bottom of the laminated core. It may include step (b) of lowering the surface below the top surface of the core support supporting the surface.

The step (a) includes raising the core support and the second heater to bring the core support into close contact with the lamina member forming the bottom of the laminated core, and allowing the second heater to enter the inside of the lamina members. Includes.

Meanwhile, the second heater 310 is operated when the laminar members to which the second heater 310 is inserted are rotated at a predetermined angle by the laminator 100. and rotates at the same angle, preventing slip at the adhesive interface of the lamina members, that is, relative rotation between 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 laminated core (C) described above, a hole penetrating in the axial direction, that is, an axial hole, is formed in the center of the laminated core (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 hung on the central hole (H) of the lamina members in the rotation direction of the lamina members to receive rotational force, and in response thereto, the integral behavior of the lamina members, more specifically, the integral behavior of the lamina members. Rotation can be implemented.

To be more specific, the second heater 310 is a core engaging portion formed on the outer peripheral surface of the core guide 310 so as to be caught in the central hole (H) of the lamina members (L) in the rotational direction. 312).

The core engaging portion 312 engages with a groove or protrusion formed on the inner peripheral surface of the lamina members, that is, on the edge of the above-described central hole. For example, when manufacturing a laminated core (rotor core) with a structure in which a shaft is coupled to a hole (axial hole) formed in the center, the shaft hole of the laminated core has a groove that prevents relative rotation of the shaft and the laminated core. and/or protrusions are formed, and grooves or protrusions of the same shape are formed in the central hole of the lamina member for manufacturing the laminated core of this structure. The core guide 310 of the core manufacturing apparatus according to this embodiment is provided with the laminate core. It has a core engaging portion 311 that has a shape corresponding to the groove and/or protrusion formed in the central hole of the bare member, that is, a shape that engages.

As a more specific example, as 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), a groove-shaped core is formed on the outer peripheral surface of the core guide 310. The locking portion 312 is formed to be long in the vertical direction.

In the case of a laminated core manufacturing method, that is, index rotation lamination, in which new lamina members are stacked by integrally rotating the laminar members at a predetermined angle based on the axis of the laminate at predetermined timing, the lamina member Protrusions (P) may be formed in the central hole of (L) at equiangular intervals.

For example, when protrusions of the same shape are formed in the center hole of the laminar member at an angle of 90 degrees, the laminator 100 performs index rotation lamination while rotating the laminar members (L) at 90 or 180 degree increments. It can be done. Although not shown, a structure such as a magnet hole for inserting a magnet may be formed in an area outside 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 at 180-degree intervals in a central hole, and the rotation angle for index rotation stacking may be 180 degrees.

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 portion 312 is provided on the outer peripheral surface of the second heater 310 at the top and bottom. Although it is formed to be long in direction, 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, and includes at least one axis for coupling to the center hole of the lamina member. When a groove is formed, the core locking portion may be implemented in the shape of a protrusion extending along the vertical direction on the outer peripheral surface of the core guide.

For example, when both the core support 210 and the second heater 310 are raised to the upper limit and the core support 210 is lowered again, the second heater 310 remains at the upper limit height. Internal heating and integral movement (integral rotation) of the lamina members on the upper side of the core support can also be implemented. And 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, they can rotate independently of each other. However, in this embodiment, when the lamina members (L) rotate, the core support 210 and the second heater 310 rotate simultaneously at the same angle and perform their respective functions.

This embodiment is an adhesive-type laminated core manufacturing device, that is, a device for manufacturing a core of a laminated structure by combining the interfaces of lamina members with an adhesive material (adhesive). For curing of the adhesive material (adhesive) by heat, that is, heat hardening, The laminator 100 includes the first heater 110 described above. That is, the first heater 110 has a heat source for externally heating the lamina members L to cure the adhesive present at the adhesive interface of the lamina members L.

In addition, the top of the second heater 310 is preferably able to rise from a maximum height above the top of the first heater 110 to a section below the top of the laminator. In this embodiment, the second heater 310 rises to a height higher than the top of the first heater 110 (the entrance of the first heater) and guides 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 a preset number of lamina members (L) passing through the lamination hole by adhesive method, and the lamina member ( L) can 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, stacking and integrating the laminar members (L), that is, the above-described laminating hole (100a), and sequentially forms the laminating hole (100a) by blanking the material. The lamina members (L) supplied continuously are stacked in a vertically aligned state.

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

The blanking unit 400 is a device that blanks material for manufacturing the lamina members (L), and sequentially forms the lamina members (L) by punching out a metal strip (S) such as an electrical steel sheet. The laminar member (L) formed at the same time as the blanking of the material is pressed into the laminator 100, that is, into the lamination hole 100a.

Therefore, each time the metal strip (S) is blanked, the laminar members inside the laminator 100 are pushed and move downward by one pitch corresponding to the thickness of the metal strip (S).

As in this embodiment, the laminator 100 includes the first heater 110 for heat curing of the adhesive, a squeeze mechanism 120 (Squeezer) for aligning/stacking the lamina members, and the laminated core. It may include a pinch mechanism (130; Pincher) to prevent (C) from falling.

The squeeze mechanism 120 has a structure penetrating in the vertical direction so that the lamina members L manufactured by the blanking unit 400 pass in an pressed-fit state (press-fit state). More specifically, the squeeze mechanism 120 stacks and moves downward 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 movement. The squeeze mechanism 120 may include at least one hollow squeeze member, that is, a squeeze ring, penetrating in the vertical direction.

In addition, the pinch mechanism 130 is a component that passes the laminated core (C) in the lower section of the laminator 100, and is provided on the lower side of the squeeze mechanism 120, and is provided on the lower side of the laminated core (C). A tubular-shaped device that can be elastically expanded to press the circumference and has a restoring force, or a device that pressurizes the outer periphery of the laminated core using the elastic force of a spring, can be used.

An external guide 140 that guides 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 the area between the squeeze mechanism and the pinch mechanism 130, and the external guide 140 has a cylindrical shape penetrating in the vertical direction and is located inside the first heater 110. It can be provided in .

And the lamina members passing through the interior of the first heater 110 are heated by the first heater 110. For example, a high-frequency induction heating device may be used as the first heater 110, but the type of the first heater is not limited to this, and other types of heaters, such as electric resistance heating wires or electric heating wire structures, may also be used. The external guide 130 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 area of the first heater 110, and more specifically, a predetermined number of lamina members (L). It is a device that presses the circumference of the laminated core (C) formed by interlayer bonding of (L) and holds the laminated core with a predetermined force, that is, a device that applies lateral pressure. Accordingly, the pinch mechanism 130 can prevent the laminated core discharged from the laminator 100 from falling down before it is supported by the core support 210.

And, the blanking unit 400 includes a blanking punch 410 provided with an upper mold 10 that can be raised and lowered, 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 above the squeeze mechanism 120 and 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 literature of this specification, and components such as the first heater, squeeze mechanism, and pinch mechanism are also patented. Since they are exemplified in several patent documents, including Document 5 (Patent Publication No. 10-1876292), additional description of these configurations is omitted.

As described above, the core manufacturing apparatus according to the present embodiment integrates a predetermined number of the lamina members (L) to form the above-described laminated core (C), between layers of the lamina members (L). Cures any adhesive present. More specifically, the adhesive existing between the layers of the lamina members (L) is used by the above-described laminator 100, especially the first heater 110 and the second heater 310, and further by the core support 210. As it hardens evenly, integration of the lamina members can be achieved stably.

The 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 a material already coated with adhesive, that is, an adhesive coating layer ( Material S having S1 and S2) may be supplied between the upper mold 10 and the lower mold 20. A technology for manufacturing an adhesive laminated core by applying adhesive to the surface of a material, that is, a metal strip and punching out the metal strip, and a technology for manufacturing an adhesive laminated core by receiving a metal strip already coated with adhesive and punching it, are known to those skilled in the art. Since this is a well-known technology, additional explanation is omitted.

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

In addition, the upper mold 10 may be further provided with 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. Since various examples of molding devices provided in the upper and lower molds for shape processing of the lamina member in the progressive mold device for manufacturing laminated cores are known, additional descriptions are omitted.

In Figure 3, the lamina members (L) stacked up and down inside the laminator 100 are separated based on a solid line, and the boundary indicated by a dotted line illustrates a portion where interlayer adhesion occurs (adhesion interface).

The laminator 100 may rotate the laminar members by a predetermined angle for the above-described index rotation lamination. For example, the squeeze mechanism 120 and the pinch mechanism 130 may rotate at the same time at the same angular speed.

The squeeze mechanism 120 is fixed inside a hollow rotary die 150 that can rotate in place, and rotates integrally with the rotary die 150. In this embodiment, the blanking die 420 is also provided in 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 rotation driver, for example, may be rotated by a gear transmission mechanism. For gear transmission, the rotation 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 engaged 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 changed in various ways, 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 can rotate together with the squeeze mechanism 120 and the pinch mechanism 130, and the first heater 110 does not rotate. In addition, 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 rotational integrity is secured by being hung on the core guide 310 in the rotational direction, the interface 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 rotary die and rotate simultaneously with the core guide 310 described above.

Meanwhile, in order to connect the core support 210 and the pinch mechanism 130, one of the core support 210 and the pinch mechanism 130 is provided with at least one connection pin 610, and the other In one, a pin hole 620 into which the connection pin 610 is inserted may be formed.

In this embodiment, the connecting pin 610 is provided on the core support 210, the pin hole 620 is formed in the pinch mechanism 130, and the connecting pin 610 is provided in the pin hole 620. By fitting, 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. Unity can be strengthened.

Below, the process of manufacturing a laminated core using the core manufacturing apparatus described above 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 bottom of the laminated core C to be taken out through the bottom of the laminator 100. And the second heater 310 enters the inside of the lamination hole (100a) through the lower end of the laminator 100 and enters the hole of the laminar members (L) below a predetermined height, for example, the center hole (H). is inserted into At this time, the core engaging portion 312 of the second heater is inserted into and engaged with the groove or protrusion formed in the central hole 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, and internally heats the lamina members (L), Furthermore, the integrated behavior of the lamina 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), the core support 210 is moved downward by the lamina members L, as shown in the example in FIG. 9. ) rotates together with the laminated core (C) on the core support 210 while gradually descending by 1 pitch, for example, a height corresponding to the thickness of one lamina member, and the second heater 310 is Rotation of the lamina members (L) is induced while maintaining the relative height with respect to the first heater.

And when the upper end of the laminated core (C) on the core support 210 comes out from the bottom (exit) of the laminator 100, that is, below the lamination hole, as shown in FIG. 10, the core support 210 It descends 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 as not to interfere when taking out the laminated core (C) on the core support 210. .

Although not shown, the operations of the core support 210 and the second heater 310, and more specifically, the operations 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 examined, and the fact that the present invention can be embodied in other specific forms in addition to the embodiments described above without departing from the spirit or scope thereof will be recognized by those skilled in the art. It is self-evident.

Therefore, the above-described embodiments should be considered illustrative rather than restrictive, and accordingly, the present invention is not limited to the above description and may be modified within the scope of the appended claims and their equivalents.

100: Laminator 110: Heater
120: Squeeze mechanism 130: Pinch mechanism
140: External guide 150: Rotating die
210: Core support 220: First lifter
310: second heater 320: second lifter

Claims (5)

A core manufacturing device that forms a laminated core by integrating a plurality of lamina members using a heat bonding method:
A lamina member has a lamination hole formed through it in a vertical direction to pass the lamina members in a laminated state, and passes through the lamination hole so that the lamina members are integrated by an adhesive present at an interface of the lamina members. A laminator including a first heater that heats the laminar members from the outside of the laminae members;
A core support provided on the lower side of the stacking hole to be capable of being raised and lowered to support the stacked core discharged from the stacking hole; and
Core manufacturing including a second heater that can enter the inside of the stacking hole through the bottom of the stacking hole and move in the vertical direction through the core support that can be lifted and lowered to heat the lamina members from the inside of the lamina members. Device. According to paragraph 1,
A core manufacturing device, characterized in that the top of the second heater can be lowered below the top surface of the core support. A core manufacturing device that forms a laminated core by integrating a plurality of lamina members using a heat bonding method:
A lamina member has a lamination hole formed through it in a vertical direction to pass the lamina members in a laminated state, and passes through the lamination hole so that the lamina members are integrated by an adhesive present at an interface of the lamina members. A laminator including a first heater that heats the laminar members from the outside of the laminae members; and
It includes a core support that is provided to be able to be raised and lowered at a lower side of the stacking hole to support the stacked core discharged from the stacking hole;
The core support is capable of generating heat to heat the lamina members. According to paragraph 3,
The core manufacturing apparatus is capable of entering the interior of the stacking hole through a lower end of the stacking hole, and further includes an internal guide that is inserted into the interior of the laminar members to align the laminar members. A core manufacturing method for forming a laminated core by integrating a plurality of laminar members through an adhesive method:
A first heater and a second heater that heat the lamina members from the outside and inside of the lamina members, respectively, so that the lamina members pass in a stacked state and are integrated by the adhesive present at the interface of the lamina members. Heating the lamina member; and
A core manufacturing method comprising lowering the top of a second heater for heating the lamina member below the top surface of a core support supporting the bottom surface of the laminated core in order to take out the laminated core.