KR20230142262A - Manufacturing method for stator - Google Patents

Abstract

The present invention relates to a method of manufacturing a stator capable of improving heat dissipation by forming a resin layer in the hairpin insertion hole, which includes a laminated core manufacturing step of manufacturing a laminated core with a hairpin insertion hole into which a hairpin is inserted along the circumferential direction. , and a resin layer forming step of inserting an insert mold into the hairpin insertion hole and then filling it with resin to form a resin layer of a predetermined thickness on the inner peripheral surface of the hairpin insertion hole. In this way, it is possible to form a resin layer without inserting insulating paper into the hairpin insertion hole, thereby improving the quality of the motor through improved productivity and heat dissipation.

Description

Manufacturing method of stator {MANUFACTURING METHOD FOR STATOR}

The present invention relates to a method of manufacturing a stator, and more specifically, to a method of manufacturing a stator that can improve heat dissipation by forming a resin layer in a hairpin insertion hole.

A motor is a mechanical device that obtains rotational power from electrical energy and includes a stator and a rotor. The rotor interacts electromagnetically with the stator and rotates with the force exerted by the magnetic field and the current flowing in the coil.

The stator refers to a stationary part of a rotating device such as a motor, that is, a fixed part that does not rotate. For example, in the case of an induction machine, the stator is composed of a stator core and a stator winding.

The rotor and stator may be made of a laminated core manufactured by stacking several layers of lamina members, which are thin metal plates, and then integrating them.

Also, among the methods of manufacturing a rotor core or a stator core, a technique is used to manufacture split cores that form part of the core and then assemble them to complete the entire core.

For example, a technology is being used to manufacture large cores of a certain size or larger in an arc shape with a center angle of 60 degrees, 120 degrees, etc., and then reassemble them to manufacture a stator or rotor core.

Here, as a method of assembling the split cores, a method of integrally fixing the split cores using a welding method using laser welding or a fitting method is used.

However, when integrating split cores using the welding fixing method, there is a problem in that the core undergoes thermal deformation due to welding heat and changes physical properties.

And, in the conventional stator, as disclosed in the stator system of Korean Patent No. 10-1888805, insulating paper is inserted into the hairpin insertion hole into which the hairpin is inserted to increase the dielectric strength.

However, when inserting insulating paper into the hairpin insertion hole, there is a problem of increased cost and decreased productivity due to the process for inserting the insulating paper. In addition, there is a problem that the performance of the motor is deteriorated because heat is not discharged smoothly due to the insulating paper.

Korean Patent Publication No. 2006-0044726 (May 16, 2006) Korean Patent Publication No. 10-1888805 (2018.08.08)

The present invention was created to solve the above problems, and its purpose is to provide a method of manufacturing a stator that can improve productivity and heat emission by forming a resin layer without inserting insulating paper into the hairpin insertion hole. .

And, according to the present invention, the purpose is to provide a method of manufacturing a stator capable of manufacturing an integrated laminated core by cross-stacking split lamina members.

In order to achieve the above object, a method of manufacturing a stator according to a preferred embodiment of the present invention includes a laminated core manufacturing step of manufacturing a laminated core having a hairpin insertion hole into which a hairpin is inserted along the circumferential direction; And a resin layer forming step of inserting an insert mold into the hairpin insertion hole and then filling it with resin to form a resin layer of a predetermined thickness on the inner peripheral surface of the hairpin insertion hole.

Here, the resin layer forming step includes an insert mold placement step of placing the laminated core in an insert mold that is inserted into the hairpin insertion hole to form a cavity into which the resin is injected; and a resin filling step of filling the cavity with resin.

In addition, the method of manufacturing a stator according to an embodiment of the present invention may include a hairpin installation step of inserting and fastening a hairpin into the hairpin insertion hole where the resin layer is formed.

In addition, the laminated core manufacturing step includes a split lamina member manufacturing step of blanking a split lamina member of a predetermined shape while passing a thin plate; A lamination step of rotating the laminated core seating portion on which the blanked split lamina member is seated to connect the seated split lamina members and stacking them while arranging them into a circular lamina member; and a pressing step of pressing and integrating the lamina members laminated on the laminated core seating portion.

Here, the step of manufacturing the split lamina member includes a hole forming step of punching the thin plate to form a common hole; An embossing forming step of forming an embossing by punching the thin plate; and a blanking step of manufacturing a divided lamina member having an arc shape by blanking the thin plate.

Here, the embossing forming step may be performed to form an embossed through hole into which the embossing is inserted at the position where the embossing is formed in the divided lamina member forming the first circular lamina member in the laminated core seating portion.

In addition, the pressing step may be performed to integrate the split lamina members by pressing the laminated split lamina members and fastening them in the stacking direction through embossing formed on the split lamina members.

The step of manufacturing the split lamina member according to another embodiment includes a hole forming step of punching the thin plate to form a common hole; An adhesive application step of applying adhesive to a portion of the thin plate where no perforation is formed; and a blanking step of manufacturing a divided lamina member having an arc shape by blanking the thin plate.

Here, the step of manufacturing the split lamina member may be performed by applying an adhesive that hardens at room temperature, blanking the lamina member to which the adhesive has been applied, and then forming an integrated laminated core by the pressing step.

The lamination step includes: a rotation arrangement step of rotating the laminated core seating portion by the center angle of the divided lamina member when the split lamina member is blanked and seated on the laminated core seating portion; And when the circular lamina member is formed through the rotation arrangement step, a cross stacking step of rotating the laminated core seating portion by half the central angle of the divided lamina member so that the divided lamina member is stacked crossing the upper side of the circular lamina member. It can be done including.

In the stacking step, the rotational arrangement step is performed after the cross-lamination step, and when the circular lamina member is formed, the cross-lamination step is performed again and the circular lamina member is formed while performing the rotational arrangement step. It can be made to cross and stack.

According to the method for manufacturing a stator according to the present invention, the quality of the motor can be improved through improved productivity and heat dissipation by forming a resin layer without inserting insulating paper into the hairpin insertion hole.

In addition, according to the present invention, an integrated laminated core can be manufactured by cross-stacking the split lamina members, which has the effect of simplifying the manufacturing process by omitting a separate process for integrating the split core.

1 is a flow chart schematically showing a method of manufacturing a stator according to an embodiment of the present invention;
Figure 2 is a flow chart schematically showing the resin layer forming step in the method of manufacturing a stator according to an embodiment of the present invention;
Figure 3 is a flow chart schematically showing the laminated core manufacturing steps in the stator manufacturing method according to an embodiment of the present invention;
Figure 4 is a flow chart schematically showing the split lamina member manufacturing step in the laminated core manufacturing step according to an embodiment of the present invention;
Figure 5 is a flow chart schematically showing the split lamina member manufacturing step according to another embodiment in the laminated core manufacturing step according to an embodiment of the present invention;
Figure 6 is a flow chart schematically showing the lamination step in the lamination core manufacturing step according to an embodiment of the present invention;
Figure 7 is a diagram schematically showing the state in which the insert mold is inserted into the hairpin insertion hole of the laminated core in the method of manufacturing a stator according to an embodiment of the present invention;
Figure 8 is a diagram schematically showing a state in which a resin layer is formed on the inner peripheral surface of a hairpin insertion hole in the method of manufacturing a stator according to an embodiment of the present invention;
Figure 9 (a) is analysis data schematically showing the heat generation state of the hairpin when insulating paper is provided in the hairpin insertion hole,
Figure 9(b) is analysis data schematically showing the heat generation state of the hairpin when a resin layer is formed in the hairpin insertion hole,
Figure 10 is a diagram schematically showing a core mold used to manufacture a laminated core in the stator manufacturing method according to an embodiment of the present invention;
Figure 11 is a diagram schematically showing a core mold according to another embodiment used to manufacture a laminated core in the method of manufacturing a stator according to an embodiment of the present invention;
Figure 12 is a diagram schematically showing a split lamina member manufactured by the split lamina member manufacturing step in the laminated core manufacturing step according to an embodiment of the present invention;
Figure 13 is a diagram sequentially showing the order in which split lamina members are stacked in the stacking step of the laminated core manufacturing step according to an embodiment of the present invention.
FIG. 14 is a cross-sectional view schematically showing the laminated core manufactured in the laminated core manufacturing step according to an embodiment of the present invention by cutting the area AA of FIG. 12.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

Since the present invention can make various changes and have various embodiments, specific embodiments will be illustrated in the drawings and described in detail in the detailed description. This is not intended to limit the present invention to specific embodiments, and should be interpreted as including all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention.

The terms used in this application are only used to describe specific embodiments and are not intended to limit the invention. Singular expressions may include plural expressions, unless the context clearly indicates otherwise.

Unless otherwise defined, all terms used herein, including technical or scientific terms, may have the same meaning as commonly understood by a person of ordinary skill in the technical field to which the present invention pertains. Terms defined in commonly used dictionaries can be interpreted as having meanings consistent with the meanings they have in the context of related technologies, and unless clearly defined in this application, are interpreted as having an ideal or excessively formal meaning. It may not work.

Hereinafter, specific embodiments of the present invention will be described with reference to the attached drawings.

Figure 1 is a flow chart schematically showing a method for manufacturing a stator according to an embodiment of the present invention, and Figure 2 is a flow chart schematically showing the resin layer forming step in the method for manufacturing a stator.

Figure 3 is a flow chart schematically showing the laminated core manufacturing step in the stator manufacturing method, Figure 4 is a flow chart schematically showing the split lamina member manufacturing step in the laminated core manufacturing step, and Figure 5 is another embodiment. It is a flowchart schematically showing the manufacturing steps of the split lamina member, and Figure 6 is a flowchart schematically showing the lamination step in the laminated core manufacturing step.

Figure 7 is a diagram schematically showing the state in which the insert mold is inserted into the hairpin insertion hole of the laminated core in the method of manufacturing the stator, and Figure 8 is a diagram schematically showing the state in which a resin layer is formed on the inner peripheral surface of the hairpin insertion hole. 9 (a) and (b) are analysis data schematically showing the heat generation state of the hairpin when the hairpin insertion hole is provided with insulating paper and a resin layer, respectively.

In addition, Figure 10 is a diagram schematically showing a core mold used in the laminated core manufacturing step, and Figure 11 is a diagram schematically showing a core mold according to another embodiment used in the laminated core manufacturing step. .

And, Figure 12 is a diagram schematically showing the split lamina member manufactured by the split lamina member manufacturing step in the laminated core manufacturing step, and Figure 13 is a diagram showing the split lamina member in the lamination step of the laminated core manufacturing step. This is a diagram sequentially showing the order of stacking, and FIG. 14 is a cross-sectional view schematically showing the laminated core manufactured in the laminated core manufacturing step by cutting the area A-A of FIG. 12.

1 to 14, the method of manufacturing a stator according to an embodiment of the present invention involves manufacturing a laminated core (C) having a hairpin insertion hole (e) into which a hairpin (HP) is inserted along the circumferential direction. Manufacturing step (S100), inserting the insert mold 30 into the hairpin insertion hole (e) and then filling it with resin to form a resin layer (RL) of a predetermined thickness on the inner peripheral surface of the hairpin insertion hole (e). It includes a stratum formation step (S200).

Here, the resin layer forming step (S200) involves placing the laminated core (C) in the insert mold (30) that is inserted into the hairpin insertion hole (e) to form a cavity (f) into which the resin is injected. It may include a step (S210) and a resin filling step (S220) of filling the cavity (f) with resin.

More specifically, when the laminated core (C) is placed in the insert mold 30, as shown in FIG. 7, the insert mold 30 is inserted into the hairpin insertion hole (e) of the laminated core (C). It is placed. At this time, the insert mold 30 is formed smaller than the hairpin insertion hole (e) and is spaced apart from the inner peripheral surface of the hairpin insertion hole (e) at a predetermined distance to form a cavity (f). Here, the size of the insert mold 30 may be the same as that of the hairpin.

Then, after filling the cavity (f) with resin, the resin is cured, and the insert mold 30 is separated. As shown in FIG. 8, a resin layer (RL) is formed on the inner peripheral surface of the hairpin insertion hole (e). ) is formed integrally. Here, the resin may be EMC (Epoxy Molding Compound).

In addition, the method of manufacturing a stator according to an embodiment of the present invention may further include a hairpin installation step (S300) of inserting and fastening a hairpin (HP) into the hairpin insertion hole (e) where the resin layer (RL) is formed. .

That is, as shown in FIGS. 7 and 8, the resin layer (RL) is formed on the inner peripheral surface of the hairpin insertion hole (e) by injection molding resin by applying the insert injection method to the hairpin insertion hole (e). Afterwards, the hairpin may be inserted and fastened into the hairpin insertion hole (e) inside the resin layer (RL).

Conventionally, the stator was manufactured by inserting insulating paper into the hairpin insertion hole formed in the stator and then inserting the hairpin, but in the present invention, the resin is injection molded by applying the insert injection method to the hairpin insertion hole (e) without using insulating paper. Thus, a resin layer (RL) was formed on the inner peripheral surface of the hairpin insertion hole (e).

Figures 9 (a) and (b) are analysis data schematically showing the heat generation state of the hairpin when the hairpin insertion hole is provided with insulating paper and a resin layer, respectively. In the above analysis data, the color of the modeling represents temperature and is expressed in rainbow colors. And, the difference in temperature is that the more red the color, the higher the temperature, and the more blue it is, the lower the temperature.

As in the past, when the stator is manufactured by inserting insulating paper into the hairpin insertion hole, heat is not discharged well when the motor is used, so as shown in (a) of Figure 9, the hairpin (HP) is red (approx. It can be seen that the temperature is high (200℃).

In comparison, according to the present invention, when the stator is manufactured by forming a resin layer (RL) of a predetermined thickness without inserting insulating paper into the hairpin insertion hole, heat is dissipated well when the motor is used, and (b) in FIG. 9 As shown, the hairpin (HP) is yellow (about 160°C), indicating a relatively low temperature.

In other words, when using the stator of the present invention manufactured by forming a resin layer (RL) without using insulating paper compared to using insulating paper in the hairpin insertion hole (e), heat dissipation is improved by about 20%, thus improving the quality of the motor. It can be improved.

The laminated core manufacturing step (S100) is a step of manufacturing a laminated core by connecting the divided lamina members (PL) to form a circular lamina member and stacking them.

More specifically, the laminated core manufacturing step (S100) includes a split lamina member manufacturing step (S110) of blanking a split lamina member (PL) of a predetermined shape while passing the thin plate (S), and the blanked split. A stacking step (S120) of rotating the laminated core seating portion 20 on which the lamina member PL is seated and stacking the lamina member to form a circular lamina member, and the lamina stacked on the laminated core seating portion 20. It may include a pressing step (S130) of pressing and integrating the members.

That is, in the laminated core manufacturing step (S100), when one split lamina member is blanked from the thin plate (S) and placed on the laminated core seating portion 20, the laminated core seating portion 20 is rotated, and then The split lamina member is blanked and arranged to be connected to the split lamina member seated on the laminated core seating portion 20, ultimately forming a circular lamina member, and again on the upper side of the circular lamina member. The divided lamina members are blanked and stacked while rotating the laminated core seating portion 20.

And, the split lamina member manufacturing step (S110) is a split lamina member according to the first embodiment of integrating the split lamina members (PL) by forming an embossing (d1) on the split lamina member (PL). A manufacturing step (S110a) and a split lamina member manufacturing step (S110b) according to the second embodiment of integrating the split lamina members (PL) by applying an adhesive to the thin plate (S) without forming an embossing (d1). ) can be achieved. In addition, by mixing the split lamina member manufacturing step (S110a) according to the first embodiment and the split lamina member manufacturing step (S110b) according to the second embodiment, embossing (d1) is performed on the thin plate (S). A method of integrating by applying adhesive after forming can also be applied.

The split lamina member manufacturing step (S110a) according to the first embodiment is a hole forming step of forming a common hole by punching the thin plate (S) using the core mold 10 shown in FIG. 5. (S111a), an embossing forming step (S112a) of punching the thin plate (S) to form an embossing (d1), and blanking the thin plate (S) to manufacture a split lamina member having an arc shape. It may be performed including a blanking step (S113a).

To this end, the core mold 10 used in the split lamina member manufacturing step (S110a) according to the first embodiment includes a slot punch 13, a fastening part punch 14, and an embossed through-hole punch ( 15), an embossing punch 16, and a blanking portion 18. Here, the embossed through-hole punch 15 functions as a unit for dividing the laminated cores C in the core mold 10.

The core mold 10 is a press-based device and is divided into an upper mold 11 and a lower mold 12, and the upper mold 11 is equipped with punches 13 for stamping, embossing or blanking by pressing the thin plate S. , 14, 15, 16, 18) are provided.

In addition, punch holes (13a, 14a, 15a, 16a, 18a) corresponding to the punches are formed in the lower mold (12), and a lamination barrel (19) for stacking and combining the divided lamina members (PL). ) is formed, and a laminated core seating portion 20 on which the blanked split lamina member PL is seated is provided.

More specifically, the slot punch 13 forms a hairpin insertion hole e into which a hairpin is inserted in the thin plate S, and the fastening part punch 14 forms both ends of the split lamina member PL. It is provided to form a fastening protrusion (a) and a fastening groove (b) to be fastened to the neighboring split lamina member.

In addition, the embossed through hole punch 15 is provided to form an embossed through hole d2 in the thin plate S, and the embossing punch 16 is provided to form an embossing d1 in the thin plate S. do.

In addition, the blanking portion 18 is provided on the upper mold 11, and a blanking hole 18a facing the blanking portion 18 is formed in the lower mold 12, so that the blanking portion 18 The divided lamina members (PL) blanked from the thin plate (S) are inserted into the laminated barrel 19 and stacked.

In addition, the blanking portion 18 and the blanking hole 18a are formed with a plurality of irregularities (not shown) in the height direction, so that when the blanking portion 18 blanks the split lamina member PL, A plurality of irregularities (c) are formed along the radial outer circumference of the divided lamina member (PL) in response to the plurality of irregularities formed in the blanking portion (18) and the blanking hole (18a).

In this way, when the divided lamina member PL is blanked while the irregularities C are formed, the divided lamina member PL is seated on the laminated core seating portion 20 at an accurate position without shaking during the blanking process. . That is, the irregularities (c) are formed by the split lamina member (PL) blanked by the blanking portion 18 in the fastening groove (b) of the split lamina member (PL) seated on the laminated core seating portion 20. ) can be guided to be seated in the correct position so that the fastening protrusion (a) can be inserted and fastened. Additionally, the unevenness C of the divided lamina member PL may be formed in a trapezoidal shape, as shown in FIG. 7 . Of course, the shape of the unevenness C is not limited to this and may be formed in a polygonal or semicircular shape such as a square or triangle.

And, referring to FIG. 9, the embossing forming step (S112a) is to form the first circular lamina member in the laminated core seating portion 20, that is, in the split lamina member PL11 located on the first layer. Instead of forming the embossing (d1) at the position where the embossing is formed, an embossing through-hole (d2) into which the embossing (d1) is inserted is formed. This is a process for dividing the plurality of laminated cores (C) stacked in the laminated barrel 19 from each other.

More specifically, the embossed through hole (d2) is not formed in all divided lamina members (PL), but, as shown in FIG. 9, is formed in the first circular lamina member to form one laminated core (C). An embossed through hole (d2) is formed at the same position as the embossing (d1) in the split lamina member (PL) located on the first layer forming the.

In addition, the embossed through-holes (d2) are not formed in the divided lamina members (PL21, PL26) that are subsequently laminated, but an embossing (d1) is formed at that position, and the above-mentioned portion of the divided lamina members (PL11) located on the first floor is formed. The embossing (d1) is fitted into the embossing hole (d2). The divided lamina members that are then stacked are integrated by fitting into each embossing (d1).

Then, when one laminated core (C) is integrated, a new laminated core can be integrated by forming an embossed through hole in the divided lamina member forming the first circular lamina member. At this time, when an embossed through hole is formed in the newly laminated first layer split lamina member, it is not fitted with the split lamina member disposed below, so any one integrated laminated core (C) and the other laminated core to be laminated thereafter It can be manufactured by separating the core.

Here, the pressing step (S113a) presses the laminated split lamina members (PL) in the stacking direction to separate the split lamina members (PL) and the split lamina members (PL) disposed on the laminated core seating portion 20. ) It is possible to integrate the divided lamina members by fitting them through the embossing (d1) formed in.

The split lamina member manufacturing step (S110b) according to the second embodiment is a hole forming step of forming a common hole by punching the thin plate (S) using the core mold 10 shown in FIG. 6. (S111b), an adhesive application step (S112b) of applying adhesive to the portion where the perforation is not formed in the thin plate (S), and a split lamina member having an arc shape by blanking the thin plate (S) ( It may include a blanking step (S113b) for manufacturing PL).

Here, the hole forming step (S111b) and the blanking step (S113b) are the same as the hole forming step (S111a) and the blanking step (S113a) described in the split lamina member manufacturing step (S110a) according to the first embodiment. do.

In addition, the split lamina member manufacturing step (S110b) according to the second embodiment provides a method of integrating the laminated core by applying an adhesive to the split lamina member (PL) without forming embossing.

To this end, the core mold 10 used in the split lamina member manufacturing step (S110b) according to the second embodiment includes a slot punch 13, a fastening part punch 14, and an adhesive application part 17. ), and may include a blanking portion 18. Here, the adhesive applicator 17 does not apply adhesive to the split lamina member forming the first circular lamina member of the laminated core (C), so that the adhesive is applied between the laminated cores (C) in the core mold (10). It functions as a unit that divides.

The adhesive application part 17 is provided at the front end of the blanking part 18 in the lower mold 12 and is a thin plate (S) in which a common perforation is formed through the slot punch 13 and the fastening part punch 14. It is provided to apply the adhesive to the area where the perforation is not formed.

In addition, the adhesive applicator 17 operates so as not to apply adhesive to the divided lamina members forming the first circular lamina member for forming the laminated core C.

That is, the first circular lamina member to form the laminated core (C) is laminated on the laminated core transfer unit 20, thereby preventing the first circular lamina member from being attached to the laminated core transfer unit 20. To achieve this, operate so as not to apply adhesive. Additionally, even when forming one laminated core (C) and then forming another laminated core (C) on top of it, the laminated cores (C) may be divided.

As an example, the adhesive application portion 17 is formed on the lower mold 12 and is connected to the storage portion 17a to accommodate the adhesive, and is connected to the storage portion 17a to apply the adhesive to the lower side of the thin plate S. It may be composed of a nozzle part 17b for applying the adhesive, and a pump 17c that provides pressure to the storage part 17a so that the adhesive stored in the storage part 17a is discharged to the nozzle part 17b. Of course, the configuration of the adhesive applicator 17 is not limited to this, and various types of conventional adhesive applicator parts may be applied.

Additionally, the adhesive may be an adhesive that can be bonded at room temperature. As an example, the adhesive may be an acrylic adhesive that hardens in a temperature range of 0 to 80°C.

That is, an adhesive that hardens at room temperature is applied, the split lamina member to which the adhesive is applied is blanked, and then pressed through the pressing step (S130) in the lamination barrel 19 to apply the adhesive at room temperature without separate heating and curing. Through this, the divided lamina members (PL) can be integrated to form a pre-bonded laminated core (C).

The stacking step (S120) is a step of rotating the laminated core seating portion 20 on which the blanked split lamina member is mounted and stacking the laminated core member to form a circular lamina member.

More specifically, in the stacking step (S120), when the split lamina member is blanked and seated on the laminated core seating portion 20 (S121), the laminated core seating portion 20 is equal to the center angle θ of the split lamina member. ), and when a circular lamina member is formed through the rotation arrangement step (S122) (example of S123), the split lamina is formed so that the split lamina members are stacked across the upper side. It includes a cross-stacking step (S125) of rotating the laminated core seating portion 20 by half of the central angle θ of the member.

In the stacking step (S120), the rotational arrangement step is performed after the cross-lamination step, and when the circular lamina member is formed, the cross-lamination step is performed again and the circular lamina member is formed while performing the rotational arrangement step. Cross and stack.

Then, when the circular lamina members are stacked to the target height for forming the laminated core C (example in S124), this is completed.

Of course, the lamination step (S120) may be performed to continuously manufacture a new lamination core (C). At this time, the laminated cores (C) can be separated through the embossing forming step (S111BA) or the adhesive applying step (S112B).

The stacking step (S120) will be sequentially described with reference to FIG. 8. Hereinafter, the description will be based on an embodiment in which the divided lamina member is formed so that the central angle (θ) forms an angle of 60 degrees, and six divided lamina members are fastened to form a circular lamina member. Of course, it is not limited to this, and the divided lamina members may be formed and laminated to have various central angles (θ) such as 30 degrees, 90 degrees, 120 degrees, and 180 degrees.

When the first split lamina member PL11 is seated on the laminated core seating portion 20, the laminated core seating portion 20 rotates by the central angle θ of the split lamina member. Then, when the second split lamina member (PL12) is blanked, it is fastened and seated on the first split lamina member (PL11).

In this way, when the sixth divided lamina member PL16 is seated in succession to complete the circular lamina member, the laminated core seating portion 20 rotates only by half the central angle θ of the divided lamina member. The first split lamina member (PL21) of the second layer is laminated.

At this time, the first split lamina member (PL21) of the second floor is stacked between the first split lamina member (PL11) and the sixth split lamina member (PL16) of the first floor, and the first split lamina member (PL11) of the first floor ) and the sixth split lamina member (PL16).

Then, when the circular lamina member is completed in the second layer, the laminated core seating portion 20 rotates only by half the central angle θ of the split lamina member, and then the first split lamina member PL31 of the third layer is rotated. are laminated.

At this time, the first split lamina member (PL31) of the 3rd floor is laminated between the first split lamina member (PL21) of the 2nd floor and the 6th split lamina member (PL26), and the first split lamina member (PL21) of the 2nd floor ) and the sixth split lamina member (PL26).

In this way, when circular lamina members are formed in one layer, circular lamina members are formed to be intersecting in the next layer, and the split lamina members intersect as shown in FIG. 9 by fastening between layers. Thus, a laminated core (C) can be manufactured.

In this way, the laminated core manufacturing step is different from the conventional method of manufacturing a laminated core by manufacturing divided cores and then combining them, in the process of blanking thin plates and stacking split lamina members, the split lamina between layers is formed. Since an integrated laminated core can be manufactured by stacking members crosswise, the process for combining separate split cores can be omitted.

Additionally, the loss of the thin plate can be minimized by blanking the lamina member as a divided lamina member rather than a circular lamina member.

Although the present invention has been described in detail through specific examples, this is for detailed explanation of the present invention, and the present invention is not limited thereto, and the present invention is intended to be understood by those skilled in the art within the technical spirit of the present invention. It is clear that modifications and improvements are possible.

All simple modifications or changes of the present invention fall within the scope of the present invention, and the specific scope of protection of the present invention will be made clear by the appended claims.

S: Sheet plate PL: Split lamina member
C: Laminated core HP: Hairpin
10: Core mold 13: Slot punch
14: fastening part punch 15: embossed through hole punch
16: embossing punch 17: adhesive application part
18: Blanking part 19: Laminated barrel
20: Laminated core transfer unit 30: Insert mold

Claims (11)

A laminated core manufacturing step of manufacturing a laminated core having a hairpin insertion hole into which a hairpin is inserted along the circumferential direction; and
A resin layer forming step of inserting an insert mold into the hairpin insertion hole and filling it with resin to form a resin layer of a predetermined thickness on the inner peripheral surface of the hairpin insertion hole;
A method of manufacturing a stator comprising.
According to paragraph 1,
The resin layer forming step is,
An insert mold placement step of placing the laminated core in an insert mold that is inserted into the hairpin insertion hole to form a cavity into which resin is injected; and
A resin filling step of filling the cavity with resin;
A method of manufacturing a stator comprising:
According to paragraph 1,
A hairpin installation step of inserting and fastening a hairpin into the hairpin insertion hole where the resin layer is formed;
A method of manufacturing a stator comprising:
According to paragraph 1,
The laminated core manufacturing step is,
A split lamina member manufacturing step of blanking a split lamina member of a predetermined shape while passing a thin plate;
A lamination step of rotating the laminated core seating portion on which the blanked split lamina member is seated to connect the seated split lamina members and stacking them while arranging them into a circular lamina member; and
A pressing step of pressing and integrating the lamina members laminated on the laminated core seating portion;
A method of manufacturing a stator comprising:
According to paragraph 4,
The manufacturing step of the split lamina member is,
A hole forming step of punching the thin plate to form a common hole;
An embossing forming step of forming an embossing by punching the thin plate; and
A blanking step of manufacturing a divided lamina member having an arc shape by blanking the thin plate;
A method of manufacturing a stator comprising:
According to clause 5,
The embossing forming step is,
A method of manufacturing a stator, characterized in that an embossed through-hole into which the embossing is inserted is formed in the divided lamina member forming the first circular lamina member at the laminated core seating portion at the position where the embossing is formed.
According to clause 5,
The pressurizing step is,
A method of manufacturing a stator, characterized in that the split lamina members are integrated by pressing the laminated split lamina members and fastening them in the stacking direction through embossing formed on the split lamina members.
According to clause 4,
The manufacturing step of the split lamina member is,
A hole forming step of punching the thin plate to form a common hole;
An adhesive application step of applying adhesive to a portion of the thin plate where no perforation is formed; and
A blanking step of manufacturing a divided lamina member having an arc shape by blanking the thin plate;
A method of manufacturing a stator comprising:
According to clause 8,
The manufacturing step of the split lamina member is,
A method of manufacturing a stator, characterized by applying an adhesive that hardens at room temperature, blanking the lamina member to which the adhesive has been applied, and then forming an integrated laminated core through the pressing step.
According to paragraph 4,
The lamination step is,
When the divided lamina member is blanked and seated on the laminated core seating portion, a rotation arrangement step of rotating the laminated core seating portion by the center angle of the divided lamina member; and
When the circular lamina member is formed through the rotation arrangement step, a cross stacking step of rotating the laminated core seating portion by half the center angle of the split lamina member so that the split lamina member is stacked crossing the upper side of the circular lamina member;
A method of manufacturing a stator comprising:
According to clause 10,
The lamination step is,
After the cross-lamination step, the rotation arrangement step is performed, and when the circular lamina member is formed, the cross-lamination step is performed again, and then the rotation arrangement step is performed while the circular lamina members are stacked crosswise. Manufacturing method of a stator.