Adhesive application and management control system of laminated core manufacturing apparatus, laminated core manufacturing apparatus having same, and adhesive application management method of laminated core manufacturing device

Abstract

Disclosed are an adhesive application management / control system of a laminated core manufacturing apparatus, a laminated core manufacturing apparatus having same, and an adhesive application management method. The adhesive application management and control system of a laminated core manufacturing apparatus comprises: an applicator provided in a press mold and applying an adhesive material to a material; an adhesive material supply device connected to the applicator to supply the adhesive material to the applicator; a flow meter provided in the adhesive material supply device to measure a flow rate of the adhesive material; and a controller which is connected to the flow meter, receives the flow rate of the adhesive material from the flow meter, and controls the flow rate of the adhesive material supplied from the adhesive material supply device to the applicator. According to the present invention, the application amount of an adhesive material can be stably managed and controlled, and thus a defect rate in a manufacturing process of a laminated core and economic loss resulting therefrom can be reduced. In addition, the application amount of the adhesive material is managed in real time and the adhesive material is precisely applied, so that the adhesive quality can be improved.

Description

Adhesive application and management control system for a laminated core manufacturing device, a laminated core manufacturing device having the same, and an adhesive application management method for a laminated core manufacturing device

[0001] The present invention relates to an adhesive application management / control system for a device for manufacturing a laminated core by an adhesive method, a laminated core manufacturing device having the same, and an adhesive application method. More specifically, the invention relates to an adhesive application management / control system for a laminated core manufacturing device for managing and controlling the amount of adhesive applied for interfacial bonding of laminas, a laminated core manufacturing device having the same, and an adhesive application management method.

[0002] Generally, a laminated core refers to a core manufactured by integrating multiple laminas, and is used as a core for rotating devices such as rotor cores and stator cores, or as a core for various devices such as transformers or ignition systems.

[0003] Recently, the above-mentioned laminated core is manufactured using a press die, more specifically a progressive die, and laminas sequentially manufactured by the said progressive die are combined to form the above-mentioned laminated core.

[0004] Methods for combining and integrating the above laminas include a tab fixing method using an interlock tab, a welding fixing method using welding, such as laser welding, and a rivet fixing method.

[0005] In order to manufacture the laminated core using the above tab fixing method, the lamina is provided with the embossing protrusion (also called an interlock tab or caulking protrusion), and an example of manufacturing the laminated core using the tab fixing method is disclosed in Registered Patent No. 10-1881257, etc.

[0006] Recently, a technique for bonding the interfaces of the aforementioned laminas with an adhesive, namely an adhesive fixing method, is being used. An invention for manufacturing a laminated core by an adhesive method, wherein an adhesive is applied to the surface of a material supplied to the press mold, such as a metal strip, and the metal strip is punched, is disclosed in Korean Registered Patent No. 10-1566491, etc.

[0007] FIG. 1 is a drawing showing an example of a laminate and a laminated core, in which a plurality of laminates (L) are laminated and combined in various ways as described above to form a laminated core (C). Of course, the shape of the laminate is not limited to the example of FIG. 1 and varies depending on the design of the laminated core.

[0008] In order to bond the interfaces of the above laminas with an adhesive, an adhesive is applied to the metal strip, and for this purpose, a lower die (20) equipped with the mold, for example, a molding die (10), is equipped with an applicator (30) for the adhesive material as illustrated in FIG. 2.

[0009] In order to manufacture a laminated core using the adhesive fixing method described above, the adhesive material is applied to the metal strip by the applicator (30). If the amount of adhesive material applied exceeds the set range and the adhesion of the interface (contact surface) of the laminas is unstable, the interface of the laminas may crack, and a problem may occur in which the performance and quality of the laminated core are degraded.

[0010] The present invention aims to provide an adhesive application management / control system for a laminated core manufacturing apparatus capable of managing and controlling the amount of adhesive material applied to a material, such as a metal strip, for interfacial adhesion of laminas, a laminated core manufacturing apparatus having the same, and an adhesive application management method.

[0011] One embodiment of the present invention provides an adhesive application management and control system for a laminated core manufacturing apparatus that manufactures a laminated core by blanking a material that is intermittently transported to form laminas and bonding the laminas adhesively, comprising: a mold comprising a vertically movable upper die, a lower die provided below the upper die, and a punch provided in the upper die for blanking, and a dispenser for applying an adhesive material to the material; an adhesive material supply device connected to the dispenser to supply the adhesive material to the dispenser; a flow meter provided in the adhesive material supply device to measure the flow rate of the adhesive material; and a controller connected to the flow meter, receiving the flow rate of the adhesive material from the flow meter and controlling the flow rate of the adhesive material supplied from the adhesive material supply device to the dispenser.

[0012] The adhesive material supply device may include a syringe for receiving the adhesive material and a connecting pipe connecting the syringe and the applicator; and the flow meter may include a flow sensor provided in either the syringe or the connecting pipe.

[0013] A dispenser for controlling the supply of the adhesive material is connected to the adhesive material supply device; the controller is connected to the dispenser and can control the operation of the dispenser.

[0014] Another embodiment of the present invention provides a laminated core manufacturing apparatus for manufacturing a laminated core by blanking a material that is intermittently conveyed to form laminas and bonding the laminas adhesively, comprising: a mold including an upper die that is vertically movable, a lower die provided below the upper die, and a punch provided in the upper die for blanking; an applicator provided in the mold for applying an adhesive material to the material; an adhesive material supply device connected to the applicator for supplying the adhesive material to the applicator; a flow meter provided in the adhesive material supply device for measuring the flow rate of the adhesive material; and a controller connected to the flow meter, receiving the flow rate of the adhesive material from the flow meter and controlling the flow rate of the adhesive material supplied from the adhesive material supply device to the applicator.

[0015] Another embodiment of the present invention provides a method for managing adhesive application in a laminated core manufacturing apparatus, wherein the apparatus blanks a material that is intermittently conveyed to form laminas and bonds the laminas adhesively to manufacture a laminated core, comprising: a step of measuring the flow rate of an adhesive material supplied from an adhesive material supply device to a dispenser that applies the adhesive material to the material; and a step of receiving information on the flow rate of the adhesive material and controlling the flow rate of the adhesive material supplied from the adhesive material supply device to the dispenser.

[0016] According to the present invention, since the amount of adhesive material applied can be stably managed and controlled, the defect rate and the resulting economic loss in the manufacturing process of a laminated core can be reduced, and the adhesive quality can be improved due to the real-time management of the amount of adhesive applied and the precise application of the adhesive.

[0017] The features and advantages of the present invention can be better understood by referring to the drawings described below together with the detailed description of the embodiments of the present invention described below, and among the drawings:

[0018] FIG. 1 is a perspective view showing an example of a laminar and a laminated core;

[0019] FIG. 2 is a plan view illustrating a structure in which an applicator is installed in a lower mold;

[0020] FIG. 3 is a schematic drawing showing a mold for one embodiment of a laminated core manufacturing apparatus according to the present invention;

[0021] FIG. 4 is a drawing showing the connection structure of an applicator and a syringe provided in a press mold, viewed from a direction perpendicular to FIG. 3;

[0022] FIG. 5 is a drawing illustrating the connection structure between the mold and the syringe holder of the laminated core manufacturing device shown in FIG. 3;

[0023] Figures 6 and 7 are drawings for explaining an adhesive application management and control system.

[0024] Hereinafter, preferred embodiments of the present invention, in which the objectives of the present invention can be specifically realized, will be described with reference to the accompanying drawings. In describing these embodiments, the same names and reference numerals are used for identical components, and additional descriptions thereof are omitted below.

[0025] The terms used in this specification are for describing embodiments of the present invention and are not intended to limit the invention. Terms including ordinal numbers, such as "first" and "second," may be used to distinguish between components of the same name when describing them, but do not define or limit the type or number of components.

[0026] And in this specification, terms such as "comprising" or "having" should be understood as not excluding the possibility of adding other features or components other than those described in the specification.

[0027] The laminated core manufacturing apparatus according to the present embodiment is an apparatus that manufactures a laminated core (C) by sequentially forming multiple laminas (L) through a blanking process and bonding the laminas with an adhesive.

[0028] One embodiment of the laminated core manufacturing apparatus according to the present invention includes a mold and an adhesive application management and control system described below. And one embodiment of the adhesive application management and control system may include an applicator, an adhesive material supply device, a flow meter, and a controller.

[0029] Referring to FIGS. 3 to 5, the laminated core manufacturing device is a device that blanks a material that is intermittently conveyed to form laminas and bonds the laminas adhesively to manufacture a laminated core, and includes a mold (100) and an applicator (200) provided in the mold (100).

[0030] The above mold (100) includes an upper mold (110) that is movable, a lower mold (120) provided below the upper mold, and at least one punch (130) provided in the upper mold. The lower mold (120) is provided with at least one die (140) facing the punch (130).

[0031] The above punch (130) is configured to process a strip-shaped material (S; hereinafter referred to as 'strip') that is intermittently conveyed between the upper and lower molds, such as a metal strip such as an electrical steel sheet, and an example of the above punch (130) is a blanking punch for blanking.

[0032] And the applicator (200) applies an adhesive material to the strip (S). In other words, the applicator (200) is configured to apply an adhesive material to the strip (S) in order to bond the interfaces of the laminas (L) formed by the blanking.

[0033] The types of the adhesive materials mentioned above are diverse. For example, the adhesive materials include materials having adhesive properties, some constituent materials thereof, or accelerators that promote adhesion. More specifically, various materials such as constituent materials (main component, curing agent) or curing accelerators of one-component adhesives or two-component adhesives correspond to the adhesive materials mentioned above. Since the structure and application method of the applicator for applying the adhesive material, more specifically the liquid adhesive material, to the strip are known in various ways, additional description of the applicator itself is omitted.

[0034] The laminated core manufacturing device according to the present embodiment may be a press die, for example, a progressive die type, capable of manufacturing a laminated core by applying an adhesive to a strip (S) that is intermittently conveyed, sequentially forming laminas by blanking, and bonding the interfaces of the laminas (L).

[0035] In order to form the laminar (L) by processing the strip (S) passing between the upper die (110) and the lower die (120), the upper die (110) may be equipped with a plurality of punches (130). Therefore, the mold (100) may be a press mold in which a plurality of punches (131, 132, 133) are arranged along the transport direction of the strip (S), more specifically, a progressive mold.

[0036] The above punches (130) sequentially process the strip (S) to form a laminar (L) having a preset shape for realizing the shape of the laminated core, and may include, for example, at least one punch (131, 132, 133) for processing the strip.

[0037] To explain the present embodiment more specifically, the mold (100) includes a punch for blanking, i.e., a blanking punch (131). The mold may further include at least one piercing punch (132, 133) for forming a hole in the strip.

[0038] The above piercing punches (132, 133) are punches for forming structures such as slots, magnet holes, or center holes (shaft holes) in a laminated core, and the shape and number of the piercing punches may vary depending on the design of the laminated core being manufactured. Also, the upper die (110) may be equipped with a pilot punch (not shown).

[0039] And the lower die (120) may be provided with at least one die (140). More specifically, the lower die (120) is provided with a lamination die (141) facing the blanking punch (131). The lower die (120) may further be provided with at least one forming die (142, 143) facing the at least one piercing punch (132, 133).

[0040] The above lamination die (141) includes a blanking die facing the blanking punch (131), and a back pressure unit (150) may be provided below the lamination die (141) so as to be vertically movable. Additionally, the lower die (120) may be provided with a pilot die facing the pilot punch.

[0041] If holes, grooves, or other shapes are not required in the above-mentioned laminar, the shape of the laminar can be determined solely by blanking, and in such cases, the piercing punch described above may be omitted.

[0042] The blanking punch (131) punches the intermittently conveyed strip (S) to sequentially form the laminas (L). The lamination die (141) forms a lamination space for the laminas and is provided below the blanking punch (131) to allow the laminas to pass through. In the lamination die (141), the laminas are joined, and the lamination cores (C) are sequentially manufactured by the joining of the laminas.

[0043] The above-mentioned stacking die (141) may include a squeeze mechanism for aligning the laminas within the stacking die and a pinch mechanism for preventing the stacking core (C) from falling from the bottom of the stacking die.

[0044] The squeeze mechanism described above is manufactured in the shape of a ring that penetrates in the axial direction and is also referred to as a squeeze ring. The lamination die may be equipped with a heater, for example, a high-frequency induction heating device, for curing the adhesive. Of course, if the laminas are bonded by a room-temperature curing adhesive, the heater may be omitted. The squeeze mechanism, the heater, and the pinch mechanism are configurations known in the art, and the lamination die may be rotatably provided in the lower die.

[0045] The positions of the tools processing the strip (S) in the preceding stage of the blanking punch (131) are not limited to the example of FIG. 3, and the upper die (110) may include a punch plate and an upper holder.

[0046] In addition, the lower die (120) may include a die plate (121) and a lower holder (122), and a mold support (123; Sub Bolster) may be provided below the lower holder (122). The upper die of the mold may be mounted on a slide (also called a 'ram') of a press and the lower die may be mounted on a bolster of a press, and it is known in the art that the shape, type, or position of the punch / die in a press die for manufacturing a laminated core, i.e., a progressive die, may be changed according to the design of the laminated core being manufactured. In FIG. 3, reference numeral 111 is a stripper provided in the upper die.

[0047] In this embodiment, the applicator (200) is provided in the mold (100) to form an applicator stage (ST) in the mold. The applicator (200) is connected to an adhesive material supply device (300) that supplies the adhesive material, and receives adhesive from the adhesive material supply device (300).

[0048] The adhesive material supply device (300) includes a syringe (310) and a connecting tube (320). The syringe (310), also called a cartridge, receives the adhesive material (A) and supplies (pressures) the adhesive material to the applicator (200).

[0049] The above connecting tube (320) is a channel for adhesive material, for example, an adhesive channel, and is also called a tube, supply tube, guide tube, or conduit. The above applicator (200) and syringe (310) are connected by a conduit that guides the adhesive material, that is, the above connecting tube (320). The above connecting tube may be branched within the mold to supply adhesive material in multiple directions.

[0050] According to the present embodiment, when the strip (S) passes between the upper mold (110) and the lower mold (120), the applicator (200) can apply to the strip (S), and the area of ​​the strip (S) where the adhesive material is applied is separated from the strip by the blanking punch and blanking die described above to form the laminar described above.

[0051] The above mold (100) is provided with a syringe holder (330), and in this embodiment, the applicator (200) and the syringe holder (330) are provided in the lower mold (120). For example, the syringe holder (330) can be fixed to the lower holder (122) of the lower mold. The syringe holder (330) has a syringe mounting part (331), and the syringe (310) is installed in the syringe mounting part (331). The syringe mounting part (331) has a hole shape into which the cartridge is inserted, but is not limited thereto, and the syringe holder (330) may have a plurality of syringe mounting parts (331).

[0052] The above applicator (200) may be provided in the upper mold (110) and / or lower mold (120). FIG. 3 shows an example in which a plurality of applicators (200) are provided in the lower mold, and an adhesive material is applied to the underside of the strip.

[0053] The adhesive material supply device (300) is equipped with a flow meter (400) for measuring the flow rate of the adhesive material (hereinafter referred to as 'adhesive'). The flow meter (400) may include a flow sensor (401) provided in either the syringe (310) or the connecting pipe (320). For example, the flow sensor may be provided at the bottom of the syringe, i.e., at the outlet side of the syringe, to check the flow rate discharged from the syringe, or the flow rate may be checked at a part of the connecting pipe.

[0054] The above flow meter (400) is connected to a controller (500; Controller) for managing / controlling the amount of adhesive applied, and the flow information measured by the flow meter (400) is transmitted to the controller (500).

[0055] The controller (500) receives flow rate information of the adhesive from the flow meter (400) and controls the flow rate of the adhesive supplied from the adhesive material supply device (300) to the applicator (200). That is, this embodiment can monitor and control the adhesive flow rate in real time to manage the amount of adhesive applied within a predetermined range and improve adhesive quality.

[0056] And a dispenser (600) for controlling the supply of the adhesive, that is, the flow rate of the adhesive, is connected to the syringe of the adhesive material supply device (300). Since the dispenser itself is a known technology in the art, additional description is omitted. The dispenser (600) may be included in the adhesive material supply device as a component of the adhesive material supply device. The dispenser may have a configuration for controlling the supply of the adhesive to the applicator, for example, a function of controlling the compressed air supplied to the syringe.

[0057] The controller (500) can be connected to the dispenser (600) and can control the operation of the dispenser, i.e., the flow rate of the adhesive, based on the adhesive flow rate information.

[0058] The controller (500) can receive flow rate information from the flow meter (400) and control the flow rate of the adhesive flowing to the applicator (200) through the connecting pipe (320). That is, the dispenser (600) can be controlled based on the flow rate data fed back from the flow meter (400) to adjust the flow rate of the adhesive in real time.

[0059] Referring to FIGS. 6 and 7, the adhesive inside the syringe (310) can be pumped to the applicator (200) by air pressure.

[0060] To this end, the syringe (310) of the adhesive material supply device may be connected to a compressed air supply device (air compressor) by an air supply pipe (not shown), and the dispenser may turn on / off the supply of the compressed air. The air supply pipe may be connected to the syringe through the dispenser, and the dispenser may control the supply of compressed air between the air compressor and the syringe.

[0061] For example, the supply of the compressed air can be opened and closed by an electronic valve of the dispenser, and the flow rate of the adhesive can be controlled by controlling the compressed air through the adjustment of the opening and closing time. Of course, the flow rate of the adhesive can also be controlled by adjusting the pressure (air pressure) of the air supplied to the syringe through the air supply pipe. Therefore, the controller can control / manage the flow rate of the adhesive supplied to the applicator through the control of the opening and closing time and / or air pressure of the compressed air supply.

[0062] Accordingly, as shown in the examples illustrated in FIGS. 6 and 7, compressed air is supplied to the syringe (310) through the dispenser (600), the adhesive moves from the syringe (310) to the nozzle of the mold, i.e., the applicator (200), and the adhesive is applied to the strip by the applicator (200). More specifically, the controller controls the dispenser pneumatic ON / OFF time in the press process to deliver compressed air to the syringe, and the delivered compressed air pushes the adhesive inside the syringe to pump the adhesive (bond) to the nozzle (applicator) inside the mold through the flow channel (connecting pipe).

[0063] In the above flow meter (400), flow information is transmitted in real time to the controller (500), and based on the real-time flow information, the controller can control the compressed air to adjust the adhesive flow rate.

[0064] Of course, the method of supplying the adhesive is not limited to the air pressure described above, and for example, a piston that pressurizes the adhesive material in the syringe (310) may be provided, and the controller may control the operation of the piston to regulate the amount of adhesive discharged from the syringe.

[0065] The mold (100) may be equipped with a plurality of applicators (200) for applying different adhesive materials to a strip. For example, the applicator (200) may include a first applicator (200A) provided in the mold to apply a main component of a two-component adhesive, and a second applicator (200B) provided in the mold to apply a curing agent of the two-component adhesive.

[0066] The first applicator (200A) may apply an adhesive, for example, a one-component adhesive, instead of the main component, and the second applicator (200B) may apply a curing accelerator instead of the curing agent. When the first applicator (200A) is provided in the lower mold (120), the second applicator may be provided in the upper mold or in the lower mold.

[0067] And as described above, the adhesive material supply device (300) may include a first supplyer (300A) connected to the first applicator to supply the main component or one-component adhesive, and a second supplyer (300B) connected to the second applicator to supply the curing agent or curing accelerator. The first supplyer (300A) and the second supplyer (300B) may each be equipped with a flow meter, and the first supplyer (300A) and the second supplyer (300B) may each be controlled by a separate controller or may be controlled together by an integrated controller.

[0068] According to the adhesive application management control system and laminated core manufacturing device described above, an adhesive application management method of a laminated core manufacturing device can be implemented, comprising a flow rate measurement step for measuring the flow rate of the adhesive material supplied from the adhesive material supply device (300) to the applicator (200), such as a main component, a curing agent, or a one-component adhesive, and a flow rate control step for receiving flow rate information of the adhesive material and controlling the flow rate of the adhesive material supplied from the adhesive material supply device (300) to the applicator (200).

[0069] The above flow rate control step may include the step of receiving flow rate information from the flow meter (400) and the step of controlling compressed air based on the flow rate information to adjust (change flow rate) the flow rate of the adhesive material supplied from the adhesive material supply device (300) to the applicator (200).

[0070] The above flow rate control step is performed by the controller, which receives flow rate information (checks the flow rate) and can control the compressed air through calculation adjustments if the flow rate information deviates from a preset value or range. The adhesive flow rate (application amount) can be input by an operator at the beginning of mold operation; however, since the adhesive flow rate fluctuates depending on the environment of the bonding process, such as temperature, humidity, or other environmental conditions, it is difficult to set and standardize the flow rate. According to the present embodiment, the flow rate information detected by the flow meter can be transmitted (feedback) to the controller in real time, and the flow rate information can be monitored in real time. Accordingly, the flow rate can be adjusted, and the adhesive application amount can be managed and controlled in real time.

[0071] As described above, preferred embodiments according to the present invention have been examined, and it is obvious to those skilled in the art that, in addition to the embodiments described above, the present invention may be embodied in other specific forms without departing from its spirit or scope.

[0072] Therefore, the embodiments described above should be regarded as exemplary rather than restrictive, and accordingly, the present invention is not limited to the description above but may be modified within the scope of the appended claims and their equivalents.

[0073] The present invention can be used to manufacture laminated cores used as cores for various devices, including rotor cores or stator cores of motors, and according to the present invention, the amount of adhesive applied for manufacturing laminated cores can be stably managed.

Claims

1. As an adhesive application management and control system for a laminated core manufacturing device that blanks intermittently conveyed material to form laminas and bonds the laminas adhesively to manufacture a laminated core: A device for applying an adhesive material to a material, provided in a mold comprising an upper die capable of raising and lowering, a lower die provided below the upper die, and a punch provided in the upper die for blanking; An adhesive material supply device connected to the applicator to supply the adhesive material to the applicator; A flow meter provided in the adhesive material supply device to measure the flow rate of the adhesive material; and An adhesive application and management and control system for a laminated core manufacturing device, comprising a controller connected to the above-mentioned flow meter, receiving flow rate information of the adhesive material from the above-mentioned flow meter, and controlling the flow rate of the adhesive material supplied from the adhesive material supply device to the above-mentioned applicator.

2. In Paragraph 1, The adhesive material supply device comprises a syringe for receiving the adhesive material and a connecting pipe connecting the syringe and the applicator; and the flow meter comprises a flow sensor provided in either the syringe or the connecting pipe, in an adhesive application, management, and control system.

3. In Paragraph 2, An adhesive material supply device is connected to a dispenser for controlling the supply of the adhesive material; the controller is connected to the dispenser and controls the operation of the dispenser, forming an adhesive application, management, and control system.

4. A laminated core manufacturing apparatus that blanks intermittently conveyed material to form laminas and bonds the laminas adhesively to manufacture a laminated core, wherein: A mold comprising an upper die capable of raising and lowering, a lower die provided below the upper die, and a punch provided in the upper die for blanking; A dispenser provided in the mold to apply an adhesive material to the above material; An adhesive material supply device connected to the applicator to supply the adhesive material to the applicator; A flow meter provided in the adhesive material supply device to measure the flow rate of the adhesive material; and A laminated core manufacturing apparatus comprising a controller connected to the above-mentioned flow meter, receiving flow rate information of the adhesive material from the above-mentioned flow meter, and controlling the flow rate of the adhesive material supplied from the adhesive material supply device to the above-mentioned applicator.

5. In Paragraph 4, The adhesive material supply device comprises a syringe for receiving the adhesive material and a connecting pipe connecting the syringe and the applicator; and the flow meter comprises a flow sensor provided in either the syringe or the connecting pipe, forming a laminated core manufacturing device.

6. A method for managing adhesive application in a laminated core manufacturing apparatus that blanks intermittently conveyed material to form laminas and bonds the laminas adhesively to manufacture a laminated core, wherein: A step of measuring the flow rate of the adhesive material supplied to a dispenser that applies the adhesive material to the material from an adhesive material supply device; and A method for managing adhesive application in a laminated core manufacturing apparatus, comprising the step of receiving flow rate information of the adhesive material and controlling the flow rate of the adhesive material supplied from the adhesive material supply device to the applicator.

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