KR20180021625A - Apparatus and Method for Manufacturing Laminated Core by Heating Inside of the Laminated Core - Google Patents

Abstract

According to the present invention, a rotation laminated core manufacturing device capable of inner diameter heating of a laminated core comprises: a piercing process of forming shapes such as a slot portion, teeth, a shaft hole and the like on a strip; a blanking process of forming one laminar member by blanking the strip after the piercing process; and a laminating process of laminating a plurality of laminar members. One laminar member is rotated by a predetermined pitch and laminated and an inner diameter surface of the laminar member is simultaneously heated whenever the one laminar member is laminated while heating the laminar member laminated during a laminating process.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an apparatus for manufacturing a laminated core capable of heating an inner diameter of a laminated core,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for manufacturing a core manufactured by laminating a laminar member. More specifically, the present invention relates to a heating and adhesive rotary laminated core manufacturing apparatus in which a laminar member punched out of a press is heated in a laminating process so that laminating members are adhered to each other and the inner surface of the laminated core can be heated .

Generally, a laminated core obtained by laminating lamination members obtained through a stamping and blanking process is used as a stator or rotor of a motor or a generator, and a method of manufacturing the laminated core is well known in the art.

A punching process and a blanking process of a slot portion and a tooth are successively performed on a strip supplied to a progressive mold apparatus to continuously form a lamina member of a single sheet and finally a lamina member sheet Are stacked at a predetermined number of times to join together the lamina members, thereby manufacturing a motor laminated core. As described in Korean Patent Laid-Open Publication No. 10-2005-0026882, for example, embossing is performed on each lamina member, and the embossing lamination method Are typically known.

In this embossing laminated motor core, since the shape of male and female protrusions formed on the base material is fastened in a forced fit manner, the steel core acts like a speed restricting jaw installed on the road, resulting in loss of iron loss and magnetic flux density. In addition, there is a problem that the drop rate is lowered and vibration noise occurs due to the resonance phenomenon.

In order to solve such a problem, a method of attaching lamina members to each other using an adhesive or an adhesive film has been proposed. Such prior arts include Korean Patents 10-1627471, 10-1618708, 10-1616987 and 10-1618709. In these prior arts, the squeeze ring in which the lamina member is laminated is heated to thermally cure the adhesive or the adhesive film applied to the lamina member to assure the mutual connection of the lamina members.

However, in general, when manufacturing a laminated core, the shape of the core sheet punched out by blanking is not always accurately maintained and a certain deviation occurs. Therefore, when the core sheet is repeatedly laminated several times, the concentricity and the perpendicularity are not constant due to the cumulative deviation in the finished core, which causes a product failure.

On the other hand, the prior art discloses a technique for heating a squeeze ring to directly heat a core product stacked in a squeeze ring. However, in the case of heating the squeeze ring, the adhesive or the adhesive film on the outer diameter side of the core can be sufficiently cured by heat, but since the inner diameter side portion of the squeeze ring is heated by the thermal conductivity of the core itself, sufficient thermal curing It is not easy. This can not provide a sufficient adhesive force between laminated lamina members, and thus causes a problem of quality defects such as a laminated portion on the inner diameter side of the core being widened.

The present inventor has proposed a heating and adhesive laminated rotary laminated core manufacturing apparatus capable of stacking laminar members while rotating the squeeze ring by a predetermined pitch and directly heating the inner diameter side of the laminated core I want to.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a device for manufacturing a heated adhesive rotary laminated core wherein a squeeze ring can be stacked while a sheet of a laminated core is heated by a predetermined pitch while being heated.

Another object of the present invention is to provide an apparatus for manufacturing a heat-bonding type rotating laminated core capable of directly heating an inner diameter side of a laminated core.

The above and other objects of the present invention can be easily achieved by the present invention described below.

The method for manufacturing a laminated core capable of heating an inner diameter of a laminated core according to the present invention

A piercing step of forming a shape of a slot, a tooth, a shaft hole and the like on the strip;

A blanking step of punching the strip after the piercing step to form a lamina member; And

A lamination step of laminating a plurality of lamina members;

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In the laminating step, the laminating member stacked in the laminating step is heated and laminated while rotating by a predetermined pitch every time one laminating member is laminated, and at the same time, the inner laminating face of the laminating member is heated together do.

The present invention is characterized in that a strip 100A which is composed of an upper mold 3 and a lower mold 4 and in which a punch mounted on the upper mold 4 is sequentially conveyed from above the lower mold 4 is pierced and blanked A laminated core manufacturing apparatus for producing a laminated core (100) by laminating a lamina member (101)

A squeeze ring 201 installed at a lower portion of the blanking die 11 for the blanking process;

A lift block (301) provided below the squeeze ring (201);

Lifting means (302) for moving the lifting block (301) up and down; And

A heating block 304 installed on the elevating block 301 and positioned on an inner surface of the laminated core 100;

And further comprising:

In the present invention, heating means 202 provided on the outer periphery of the squeeze ring 201; And

A rotary die 203 provided with the squeeze ring 201 and the heating means 202 and rotating together with the squeeze ring 201 and the heating means 202 by a predetermined pitch;

And the like.

In the present invention, furthermore, a support pad 303 rotatably installed on the elevation block 301,

The heating block 304 may be installed on the support pad 303 and rotate together with the support pad 303.

In the present invention, the heat block 304 may further include a heat radiation pad 306 installed at a lower portion of the heating block 304.

(1) The laminated core can be laminated while being heated by a certain amount of rotation, thereby eliminating the lamination deviation of the laminated core, securing a good squareness and concentricity, and (2) The present invention has the effect of providing a heat-bonding type rotating laminated core manufacturing apparatus capable of directly heating a side of a laminated core to ensure good quality of a laminated core.

1 is a cross-sectional view showing an example of a strip for manufacturing a lamina member to which the present invention is applied.
2 is a perspective view showing a lamina member applied to the present invention.
3 is a perspective view of a laminated core manufactured by laminating a lamina member applied to the present invention.
4 is a cross-sectional view showing a device for manufacturing a heated adhesive rotary laminated core according to the present invention.
Fig. 5 is a cross-sectional view showing a laminating apparatus and an inner diameter heating apparatus of a device for manufacturing a heated adhesive rotary laminated core according to the present invention.
6 is a cross-sectional view showing an example of the operation of the laminating apparatus and the inner diameter heating apparatus of the apparatus for manufacturing a heated adhesive rotary laminated core according to the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view showing an example of a strip 100A for manufacturing a lamina member 101 applied to the present invention.

1, a strip 100A applied to the present invention is formed by depositing a synthetic resin adhesive film 100A 'on the surface of a strip-shaped steel sheet 100-1 made of a thin plate or applying a synthetic resin coating layer for adhesion . In the present invention, it is preferable to use this type of strip 100A, but it is not necessarily limited to such a strip 100A. For example, a synthetic resin adhesive film 100A 'may be formed only on one side of the steel sheet 100-1, and an adhesive agent other than the adhesive film 100A' may be applied on the surface of the steel sheet 100-1 It is also acceptable to apply the form. Such an adhesive is applied to the surface of the steel sheet 100-1 in a state where the adhesive is not applied in the manufacturing apparatus 1 of the laminated core, during the piercing, blanking or laminating process, It can also be applied in form. Hereinafter, a steel strip 100-1 with an adhesive film 100A 'for convenience will be described as an example of the strip 100A.

FIG. 2 is a perspective view showing a lamina member 101 applied to the present invention, and FIG. 3 is a perspective view of a laminated core 100 manufactured by stacking lamina members 101 applied to the present invention.

Referring to FIG. 2, a lamina member 101 is shown, which is a sheet of laminated cores produced by punching and blanking the strip 100A by a device 1 described below. A laminated core 100 manufactured by laminating the laminar members 101 a predetermined number of times is shown in Fig.

The laminated core 100 is formed in such a state that the synthetic resin film 100A 'deposited on the surface of the lamina member 101 or the adhesive is hardened by heat and adhered to the back surface of the lamina member 101. [

4 is a cross-sectional view showing an apparatus 1 for manufacturing a heated adhesive rotary laminated core according to the present invention.

The synthetic resin adhesive film 100A 'supplied to the apparatus 1 shown in FIG. 4 is applied to the strip 100A in which the synthetic resin for vapor deposition or adhesion is coated, A lamination member 101 of a single piece is successively formed so that the lamination core 101 and the lamination member 101 are successively formed and then a lamination of a predetermined number of laminated members 101 finally punched out is performed to thermally cure the lamination core 100 ).

More specifically, referring to FIG. 4, the apparatus for producing a laminated core according to the present invention is characterized in that a sequentially moving synthetic resin adhesive film 100A 'is subjected to a continuous operation on a strip 100A coated with synthetic resin for vapor deposition or adhesion A press working method is applied. That is, the apparatus 1 according to the present invention is preferably a progressive mold apparatus and comprises an upper mold 3 and a lower mold 4.

The upper mold 3 is disposed on the upper side of the lower mold 4 and moves in the direction of the lift v toward the lower mold 4. [ The movement of the upper mold 3 is carried out as the upper mold 3 is mounted on the press machine and the press is driven. At the upper portion of the lower mold 4, the strip 100A moves along the advancing direction f.

The upper mold 3 includes piercing punches 5, 6, 7 and 8 and blanking punches 9 for punching the strips 100A, a punch plate 17 for mounting the punches, And a punch holder 19 for supporting the punch holder 19 from above. 4, four piercing punches 5, 6, 7 and 8 are shown. However, the number and shape of the piercing punches may vary depending on the shape and size of the core to be manufactured, Of course, punching and blanking of the strip 100A are performed in the order of the control program mounted on the microprocessor (not shown).

The upper mold 3 is provided with a punch backing plate 18 for supporting the punch between the punch holder 19 and the punch plate 17 and a punch backing plate 18 for guiding the punch to move to the correct position, The stripper plate 20 may be provided to remove the strips 100A.

The lower mold 4 includes a die holder 16 mounted on the press machine and holding the entire center of the lower mold 4, a die plate 13 seated on the upper side of the die holder 16, And a die backing plate 15 positioned between the die plate 13 and the die plate 13 to support the pressure applied to the die plate 13.

Further, in the lower mold 4, a cylindrical blanking die 11 having a hollow formed at a position corresponding to the blanking punch 9 is mounted. The blanking die 11 is pushed by the blanking punch 9 to discharge the lamina member 101 which is a core sheet separated from the strip 100A to the lower side and the discharged lamina member 101 is conveyed to the blanking die 11 and the squeeze ring 14 provided at the lower part of the laminate member 101. The laminar members 101 are heated at the same time to be bonded to each other by thermal curing of the adhesive film.

The lamina member 101 punched out from the blanking die 11 is pressed into the squeeze ring 201 of the laminating apparatus 200 under the blanking die 11 and the other lamina members 101 are sequentially And is pushed down to the lower part of the squeeze ring 201 while being stacked. The core in which the predetermined number of sheets are laminated becomes one product and is taken out from the bottom of the squeeze ring 201 to the outside.

The laminated core manufacturing process using the apparatus 1 for producing a laminated core according to the present invention comprises a piercing process, a blanking process, and a laminating process.

In the piercing step, a basic shape such as a slot portion 101 ', a tooth 101', a shaft hole and the like excluding the core outer shape is formed on the strip 100A. At this time, The piercing punches 5, 6, 7 and 8 are attached to the upper mold 3 and move in the up and down direction while being shifted by one pitch successively from the strip 100A. In the blanking process, To form a lamina member 101. The lamina member 101 thus formed is sequentially laminated in the lamination process.

The lamination step is preferably a step in which a laminating member laminated for thermal curing of an adhesive film or an adhesive together with the lamination is combined together. Further, the squeeze ring 201 is stacked while being rotated by a predetermined pitch every time one lamina member is stacked with heating. The configuration for this will be described with reference to FIG. 5 and FIG. 6 below.

5 is a cross-sectional view showing a laminating apparatus 200 and an inner diameter heating apparatus 300 of the apparatus 1 for manufacturing a hot-pressed rotating laminated core according to the present invention, and Fig. 6 is a cross- Sectional view showing an example of the operation of the laminating apparatus and the inner diameter heating apparatus.

5, the laminating apparatus 200 of the laminated core producing apparatus 1 according to the present invention comprises a squeeze ring 201, a heating means 202, a rotating die (not shown) provided at the bottom of the blanking die 11, 203, a rotating electrode 205, a fixed electrode 206, and a rotation driving member 207.

The squeeze ring 201 is a portion where the laminar member 101 formed in the blanking process is stacked and a plurality of laminar members 101 are stacked so that the laminar member 101 on the upper side pushes the lower laminar member The laminated core is moved downward. The squeeze ring 201 is heated by the heating means 202 provided on the outer peripheral surface of the squeeze ring 201. [ The squeeze ring 201 is heated to maintain a predetermined temperature required for curing. The heated squeeze ring 201 heats the laminated lamina member 101 and the adhesive film or adhesive on the surface thereof is thermally cured, So that adhesion between the members (101) can be performed well. The heating means 202 is preferably a PTC ceramic heater, but is not necessarily limited thereto. The position where the heating means 202 is installed is also preferably the outer circumferential surface of the squeeze ring 201, but it is not necessarily limited thereto, and it may be located inside the squeeze ring 201 or at other positions.

The squeeze ring 201 and the heating means 202 are provided inside the rotary die 203 so that when the rotary die 203 is rotated by a predetermined pitch, ). A plurality of bearings (not shown) may be applied at the required positions to support the rotation of the rotary die 203.

The heating means 202 of the rotary die 203 must be heated while rotating and a rotary electrode 205 electrically connected to the heating means 202 is provided on the outer peripheral surface of the rotary die 203 for heating the heating means 202 Respectively. The rotating electrode 205 is a continuous ring electrode and is electrically connected to the fixed electrode 206 which rotates together with the rotating die 203 and is located separately on the outer side of the rotating die 203. That is, the fixed electrode 206 always maintains an electrical connection with the rotating electrode 205 even when the rotating die 203 is rotated, so that even when the rotating die 203 is rotating, the heating means 202 is electrically To be heated.

On the outer circumferential surface of the rotary die 203, a rotation drive member 207 is provided. The rotation driving member 207 is a member capable of transmitting driving force of various types of driving means, that is, a motor or the like, to the rotating die 203 that can rotate the rotating die 203. For example, gears, pulleys and the like can be applied. 5 is a pulley and connects a drive belt (not shown) connected to a drive shaft of a separately installed motor (not shown) to the rotation drive member 207 to rotate the rotation drive member 207, So that the rotary die 203 is rotated. It is preferable that the rotation of the rotary die 203 is made by a predetermined constant pitch. For example, when one pitch is set to 60 degrees, one lamina member is blanked, and the lamina member laminated thereon is laminated while being rotated by 60 degrees. As this is repeated, laminated cores can be manufactured while laminating members continuously rotated by 60 degrees.

A heat radiation pad 208 may be provided under the blanking die 11 or the like in order to prevent the heat generated by the heating means 202 from being conducted to the blanking die 11 or the die plate 13 or the like.

The laminating apparatus 200 configured as described above allows simultaneous heating and rotation by a predetermined pitch while laminating the laminar members.

On the other hand, the inner circumferential surface of the laminated core 100 has a delicate structure as compared with the outer circumferential surface of the laminated core 100 like the teeth 101 ". Therefore, if the lamination members are not secured to each other, ") Of the laminated core 100 may be caused to occur. Therefore, it may be required to directly heat the inner circumferential surface of the laminated core 100. To this end, the manufacturing apparatus 1 of the present invention may further include an inner diameter heating apparatus 300 at a lower portion of the laminating apparatus 200.

The inner diameter heating apparatus 300 of the present invention includes a lift block 301, an elevation means 302, a support pad 303, and a heating block 304.

The elevating block 301 is operated to move up and down by the operation of the elevating means 302. The elevating means 302 may apply various known technical means to move the elevating block 301 such as a motor or a pneumatic cylinder up and down. The elevating block 301 is vertically movable toward the inner diameter side of the rotary die 203 by the elevating means 302.

The support pad 303 is installed so as to be freely rotatable with respect to a rotation axis provided at the center thereof. A bearing (not shown) may be provided on the upper portion of the lift block 301 to support this rotation. The support pad 303 may be omitted if rotation is not required.

The heating block 304 is heated by electric power supplied from the outside and positioned on the inner surface of the laminated core 100 to heat the inner surface of the laminated core 100. As a means for heating the heating block 304, a commonly used heating means such as a heating rod or the like can be applied. The outer diameter of the heating block 304 is set to be equal to or slightly smaller than the inner diameter of the laminated core 100 so that the heating block 304 is positioned closely to the inner diameter surface of the laminated core 100, . The height of the heating block 304 is set to be equal to or slightly greater than the height of one laminated core 100. [ By doing so, the inner surface of the laminated core 100 can be heated more effectively.

6, the lifting block 301 is raised by the operation of the lifting means 302 and is located on the lower side of the squeeze ring 201. As shown in Fig. A heating block 304 is positioned on the inner diameter surface of the laminated core 100 stacked in the squeeze ring 201 to heat the inner diameter side of the laminated core 100 and at the same time the laminar member 101 is laminated from above, When the core 100 is pushed down and one laminated core 100 is separated, the lifting block 301 is lowered as shown in FIG. 5, and the laminated core 100 is completed and taken out to the outside.

The support pad 303 may be configured to rotate together with the squeeze ring 201, but it is not necessarily required to rotate 360 degrees like the squeeze ring 201. This is because the support pad 303 can be moved up and down at any time by the lifting means 301 and the inner diameter can be heated even after the laminated core 100 has been removed from the squeeze ring 201.

A heat radiating pad 306 may be further provided under the heating block 304 to prevent heat generated in the heating block 304 from being conducted to the lifting block 301 or the like.

It should be noted that the above description of the present invention is merely illustrative and not for the purpose of defining the scope of the present invention in order to understand the present invention. It is intended that the scope of the invention be defined by the claims appended hereto, and that all such modifications and variations are intended to be included within the scope of the present invention.

1: mold device 3: upper mold
4: lower mold 5, 6, 7, 8: piercing punch
9: blanking punch 12: blanking die
13: Die plate
15: die backing plate 16: die holder
17: Punch plate 18: Punch backing plate
19: Punch holder 20: Stripper plate
100: laminated core 100A: strip
100A ': synthetic resin adhesive film 100: laminated core
101: Lamina member 200: Lamination device
201: squeeze ring 202: heating means
203: rotating die 205: rotating electrode
206: fixed electrode 207: rotation driving member
208, 306: heat radiation pad 300: inner diameter heating device
301: elevating block 302: elevating means
303: support pad 304: heating block

Claims (4)

A piercing step of forming a shape of a slot, a tooth, a shaft hole and the like on the strip;
A blanking step of punching the strip after the piercing step to form a lamina member; And
A lamination step of laminating a plurality of lamina members;
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In the laminating step, the laminating member laminated in the laminating step is heated and laminated while rotating by a predetermined pitch every time one laminating member is laminated, and at the same time, the inner laminating face of the laminating member is heated together And the inner diameter of the laminated core can be increased. A strip 100A composed of an upper metal mold 3 and a lower metal mold 4 and in which a punch mounted on the upper metal mold 4 is sequentially transferred from above the lower metal mold 4 is pierced and blanked A laminated core manufacturing apparatus for producing a laminated core (100) by laminating a sheet of a member (101)
A squeeze ring 201 installed at a lower portion of the blanking die 11 for the blanking process;
A lift block (301) provided below the squeeze ring (201);
Lifting means (302) for moving the lifting block (301) up and down; And
A heating block 304 installed on the elevating block 301 and positioned on an inner surface of the laminated core 100;
Further comprising: a laminated core manufacturing apparatus for manufacturing a laminated core. 3. The method of claim 2,
Heating means 202 provided on the outer periphery of the squeeze ring 201; And
A rotary die 203 provided with the squeeze ring 201 and the heating means 202 and rotating together with the squeeze ring 201 and the heating means 202 by a predetermined pitch;
Further comprising: a laminated core manufacturing apparatus for manufacturing a laminated core. The apparatus for manufacturing a laminated core according to claim 2, further comprising a heat radiation pad (306) provided under the heating block (304).

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