KR20170049062A - Method for Manufacturing Laminated Core with Automated Core Separation - Google Patents

Abstract

According to the present invention, a method for manufacturing an adhesive laminated core by bonding a laminated core (100) where n sheets are laminated comprises: a step of laminating n laminar members; a step of forming at least one protrusion (100-2) in such a manner as protruding upward from an (n+1)^th strip (100A); a step of blanking a laminar member (101) having at least one protrusion formed thereon from the strip (100A) having the protrusion (100-2) protruding therefrom; a step of blanking an (n+2)^th laminar member positioned on an upper part of the laminar member (101) having at least one protrusion formed therein to allow an (n+2)^th laminar member to press the laminar member (101) having at least one protrusion formed thereon; a step of changing the shape of an upward protrusion (100-2) of the laminar member (101) having at least one protrusion formed thereon into a downward wrinkled shape; and a step of allowing the laminar member having the protrusion to be separated therefrom, not to adhere to the n^th laminar member.

Description

TECHNICAL FIELD [0001] The present invention relates to a method for manufacturing a laminated core,

The present invention relates to an adhesive laminated core manufacturing apparatus for use as a stator or rotor of a motor or a generator, which is manufactured by laminating a liminar member. More particularly, the present invention relates to an adhesive laminated core manufacturing apparatus capable of easily separating one core product while continuously stacking lamina members.

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.

The laminar member is formed by successively forming a lamination member such as a slot, a tooth, and the like on the strip supplied to the progressive mold apparatus in succession to form a single lamina member. Finally, A laminated laminated core is produced by laminating and laminating a predetermined number of laminated members.

A method of fixing a lamina member is disclosed in, for example, Japanese Unexamined Patent Application Publication No. 10-2005-0026882, wherein an embossing lamination method is known in which embossing is formed on each lamina member, have.

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, in the adhesive lamination system, in Patent Publication No. 10-0119014, a die supported by a lower mold and a strip positioned at the upper portion of the die and moving upward and downward and supplied to the upper surface of the die A punch holder for supporting the punch at the outer periphery of the punch under the support of the upper mold, an adhesive supply means for supplying an adhesive to the upper side or the side of the strip, And a laminated ring supported by a clamp of the side pressure for a predetermined height.

In addition, in Japanese Patent Application Laid-Open No. 10-1164803, when a press mold is operated, a certain amount of bond is put into a strip attached to a lamination separating jig attached to a mold, and when the desired number of punches is reached, And then the laminate separator jigged up when it is started again is reintroduced, and the product is repeatedly produced by the desired number of times.

However, in the above-mentioned conventional adhesive lamination system, when applying the adhesive, the adhesive is simply sprayed on the upper side or the side surface of the strip in the adhesive supply means, or the adhesive is dropped from the lake connected to the lamination separation jig, Not only the productivity of the laminated core is remarkably lowered but also the application is not precisely performed at the application point where the adhesive is to be applied and the adhesive is scattered around and adversely affects the mold.

Meanwhile, the laminated core completed in the conventional technique is embossed by a predetermined number of times in the mold apparatus to produce a predetermined number of laminated cores, or a certain amount of bond is put into the strip, and when the desired number of punches is reached, In the case of the former, the number of laminated cores is discharged to a predetermined number, the temporary mold apparatus is stopped, and the mold apparatus is stopped again, The productivity of the laminated core is remarkably lowered. In the latter case, even if the bond is not applied to the counted lamina member, the lamina member is continuously laminated on the blanking die and discharged as a squeeze ring Therefore, the lamina part And lamina members not coated with a bond are likely to be adhered to each other due to mutual bonding, so that it is difficult to obtain a predetermined number of laminated cores. In addition, in the production of a currently known laminated adhesive core, laminated cores are bonded, The technique of continuously discharging the toner by the number of sheets is not known.

Korean Patent Publication No. 10-2005-0026882 Korean Patent Publication No. 10-0119014 Korean Patent Publication No. 10-1164803

In order to solve the above problems, the present invention proposes a more improved adhesive laminated core manufacturing apparatus.

The present invention provides a bonded laminated core manufacturing apparatus for a motor core which adopts a heat bonding method without selecting a method of applying an adhesive, so that a firm and stable adhesion can be rapidly performed, and a loss of iron loss and magnetic flux density is greatly reduced The present invention also provides a laminated core for a motor in which the shape tolerance and the fastening strength such as the right angle and the flatness are excellent and the efficiency of the motor is improved.

The adhesive laminated core manufacturing method according to the embodiment of the present invention

A method for manufacturing a laminated core (100) in which n number of laminated layers are bonded,

laminating n lamina members;

(n + 1) -th strip 100A so as to protrude at least one protrusion 100-2 upward;

Blanking a lamina member (101) having at least one protrusion from a strip (100A) protruding from the protrusion (100-2);

(N + 2) th lamina member is blanked on an upper part of the lamina member 101 having at least one protrusion formed therein, and the (n + 2) th lamina member is laminated on the lamina member having the at least one protrusion Presses the member (101);

The shape of the upward protrusion 100-2 of the lamina member 101 formed with at least one protrusion is deformed into a downwardly folded shape;

The lamina member having the projection is separated without being bonded to the n-th lamina member;

The method comprising the steps of:

The adhesive laminated core manufacturing method according to another embodiment of the present invention

A method for manufacturing a laminated core (100) in which n number of laminated layers are bonded,

(n-1) laminar members are stacked;

at least one protrusion (100-2) protrudes downward from the nth strip (100A);

Blanking a lamina member (101) having at least one protrusion from a strip (100A) protruding from the protrusion (100-2);

(N + 1) th lamina member is blanked on an upper part of the lamina member 101 having at least one protrusion formed therein, and the (n + 1) th lamina member is laminated on the lamina member having the at least one protrusion Presses the member (101);

The shape of the downward protrusion (100-2) of the lamina member (101) having at least one protrusion formed therein is deformed into an upward wrinkle shape;

The lamina member having the projections is separated without being adhered to the (n + 1) th lamina member;

≪ / RTI > further comprising the step of:

According to the present invention, a plurality of lamina members stacked in a squeeze ring are heated by a high frequency induction heating method to melt a synthetic resin adhesive coating layer or a deposited synthetic resin adhesive film coated on the surface of the lamina member, The synthetic resin film or the coating layer is adhered to the back surface of the lamina member so that the lamination of the lamina member and the lamina member is stably and stably bonded.

Further, the present invention enables quick and stable adhesion process between laminated lamina members.

In addition, the present invention can produce the laminated core and the laminated core easily by separating the laminated core from the laminated core, thereby significantly reducing the manufacturing time and equipment cost required for manufacturing the motor core, efficiently using the working space, It is effective to reduce the cost.

1 is a perspective view of a strip applied to an embodiment of the present invention.
2 is a perspective view showing a lamina member obtained by punching and blanking a strip according to an embodiment of the present invention.
3 is a perspective view of a laminated core according to an embodiment of the present invention.
4 is a cross-sectional view of a laminated core production apparatus according to an embodiment of the present invention.
5 is a partial cross-sectional view of an adhesive heating means and a magnetic shielding means according to an embodiment of the present invention.
6 is a horizontal sectional view of the magnetic shielding means according to the embodiment of the present invention.
FIG. 7 is a cross-sectional view showing an adhesive heating means and a magnetic shielding means according to another embodiment of the present invention. FIG.
8 is an excerpted cross-sectional view of adhesive heating means and magnetic field shielding means according to another embodiment of the present invention.
Fig. 9 is a sectional view of a laminated core manufacturing apparatus of another embodiment of Fig. 4, which is an embodiment of the present invention.
10 is a cross-sectional view of a laminated core manufacturing apparatus according to another embodiment of FIG. 4, which is an embodiment of the present invention.
11 is a view showing a manufacturing process of a laminated core according to an embodiment of the present invention shown in FIG.
FIG. 12 is a view illustrating a manufacturing process of a laminated core according to the embodiment of FIG. 11, which is an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout.

FIG. 1 is a perspective view of a strip 100A applied to an embodiment of the present invention, FIG. 2 is a perspective view of a lamina member obtained by stamping and blanking a strip according to an embodiment of the present invention, and FIG. Fig. 4 is a sectional view of a laminated core production apparatus according to an embodiment of the present invention. Fig.

Referring to FIG. 1, a strip 100A according to the present invention is formed by applying a synthetic resin adhesive film 100A 'on a surface of a strip-shaped steel plate 100-1 formed of a thin plate, Lt; / RTI > One object of the present invention is to produce a laminated adhesive laminate core using the strip 100A without the need to apply an adhesive applicator for bonding as before.

2, a lamina member 101 is shown in which the strip 100A is punched and blanked by a mold apparatus 1 described later. The laminar member 101 is bonded to a predetermined number of the lamina members 101 A laminated core 100 is disclosed in Fig.

The laminated core 100 is formed such that the synthetic resin film 100A 'deposited on the surface of the lamina member 101 is melted and bonded to the back metal surface of the lamina member 101. [ 1 to 3, the strip 100A and the laminar member 101 are shown as having an adhesive film 100A 'formed on the upper surface of the steel sheet 100-1. However, in practice, the steel sheet 100-1 ), Or an adhesive film may be deposited only on the lower surface. It goes without saying that the present invention can be applied to any case. Although the adhesive film is formed on the upper surface as in the embodiment shown in Figs. 1 to 3 in the present specification, the present invention is applicable to the case where the adhesive film 100A ') Is formed.

The synthetic resin adhesive film 100A 'supplied to the mold 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 by punching and blanking, and a laminated member 101 of a finally punched laminar member 101 is stacked and fixed to form a laminated core 100 ).

In particular, the present invention relates to a method for producing a laminated core in which a synthetic resin adhesive film 100A 'is bonded using a strip 100A for a core coated with synthetic resin for vapor deposition or bonding, The present invention is intended to provide a heat adhesive laminated core device by a heating method in a laminated metal mold.

4, the apparatus for producing a laminated core according to an embodiment of the present invention includes a step of sequentially moving a synthetic resin adhesive film 100A 'on a strip 100A coated with synthetic resin for vapor deposition or adhesion, The mold apparatus 1 can be used.

The mold apparatus 1 proposed in 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 are heated while passing through the squeeze ring 14 installed at the lower portion of the laminar member 101, thereby bonding the laminar members 101 to each other.

The predetermined number of lamina members 101 punched out of the blanking die 11 and gathered in the inside are pressed by the squeeze ring 14 and stacked on the lower side to be in close contact with each other and heated by the adhesive heating means 200, The laminated core 100 in which the bare member 101 and the lamina member 101 are bonded and the bonded laminated core 100 is subjected to the holding force release of the squeeze ring 14 or the rotation of the rotary die provided on the outer peripheral surface of the squeeze ring, The sensor is automatically or semi-automatically discharged to the outside by a known technique such as sensing.

The laminated core manufacturing process using the mold apparatus 1 according to the present invention may include a piercing process, a protrusion forming process for separating the laminated core between the piercing process and the blanking process, a blanking process, and a laminating process. Process. Here, the laminating step is preferably a step in which heating is performed together with the laminating.

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, which are mounted on the upper mold 3 and move in the up and down direction, are pierced while being shifted one pitch at a time.

When the piercing process is completed, a lamination core separating protrusion forming process for separating and discharging a predetermined number of stacked cores 100 and a predetermined number of stacked cores 100 to be described later may be performed.

As shown in Fig. 9, the protrusion forming apparatus 30 for separating the laminated core, which is provided in the upper and lower molds 3 and 4 between the piercing and blanking processes for performing the laminate core separating protrusion forming process, The upper die 3 is provided with the fixing die 31 having the concave portion 31 'and the lower die 4 at the corresponding position is provided with the up-and-down moving die 32 having the protrusion 32' . The apparatus for forming a protrusion for separating a laminated core according to the present invention is characterized in that at least one separating projection 100-2 is formed on the strip 100A to be pierced and conveyed, The die 32 is moved up and down through an actuator 40A such as a hydraulic cylinder and the separating protrusion 100-2 is projected upward from the strip 100A as shown in Fig. So that the laminated core 100 can be separated. On the other hand, the separating projection 100-2 can be formed by the operation of the upper mold 3 and the lower mold 4 without the actuator 40A being operated.

The protrusion forming device 30 for separating a laminated core provided on the upper and lower molds 3 and 4 between the piercing and blanking processes according to another embodiment shown in Fig. A fixed die 31 having a protruding portion 31A is provided and a vertically moving die 32 having a recessed portion 32A is provided in a lower mold 4 at a position corresponding to the fixed die 31, At least one separating projection 100-2 can be formed so as to protrude downward, and a lamina member positioned directly above the lamina member having the separating projection 100-2 can be attached So that it can be separated. Of course, the above-described projection forming apparatus 30 may be configured such that at least one downward projection is formed on the lamina member 101 by changing the shape of the blanking punch rather than a separate apparatus.

The process of forming the projections for separating the laminated core between the piercing process and the blanking process by the protrusion forming device for separating the laminated core 30 and the laminated core separation process will be described in detail with reference to FIGS. 9 and 11. FIG.

In the case where the laminated core 100 in which 15 sheets are stacked by the driving program installed in the control device 40 to be described later is manufactured for the 16th strip 100A (step (a) of FIG. 11) After the piercing process, the strip 100A carrying the fixing die 31 having the concave portion 31 'and the vertically moving die 32 having the protruding portion 32' (Step (b) of FIG. 11), a blanking process is performed in which the lamina member 101 is obtained by pulling out the outer shape of the core from the strip 100A in which the protrusion 100-2 protrudes (Step (c) of FIG. 11).

15 lamina members 101 without punched protrusions 100-2 are laminated through a repeated blanking process to form a laminated core. On the top of the 15 laminated cores, (Step (d) of Fig. 11).

Next, a lamina member having no protrusion 100-2 is continuously laminated on the lamina member having the protrusion 100-2 (step (e) of Fig. 11). The laminar member having the projection 100-2 is subjected to pressure from the upper and lower laminar members due to the pressing force of the laminar member on the upper side. The shape of the projection 100-2, which is raised by this pressure, is deformed similarly to the downward fold. By this deformation, the lamina member having the projection 100-2 is separated without being adhered to the lower lamina member (step (f) of Fig. 11).

An individual laminated core having fifteen pieces that pass through the squeeze ring 14 through such steps can be obtained as a final product.

That is, when the laminated core 100 laminated inside the squeeze ring 14 is heated by the adhesive heating means 200 as described later, the respective synthetic resin adhesive films 100A 'are melted and laminated to the respective lamina members 101 ) Is bonded to the metal surface. On the upper surface of the uppermost lamina member 101 constituting the first 15 laminated cores 100, there are formed, on the uppermost surface of the lamina member 101, the lower lamina member 101 constituting the other 15 laminated cores 100, Even if the laminar member 101 is heated by the adhesive heating means 200 since the laminated member 100-2 is deformed and is in an interposed state, A separating projection 100-2 protruding downward from the bottom of the lamina member 101 constituting the laminated core 100 of fifteen other sheets to be laminated later with the surface of the synthetic resin adhesive film 100A ' The area of contact with the deformed separating protrusion 100-2 is narrower than that of the separating protrusion 100-2, so that the adhesive force of the portion is very weak. The laminar member 101 in which the separating protrusions 100-2 are downwardly protruded and the first 15 laminated cores 100 are separated from each other due to the weak bonding portion The laminated core 100 to which 15 sheets are bonded from the squeeze ring 14 is discharged.

The laminar member 101 and the synthetic resin adhesive film 100A 'constituting the fifteen laminated cores 100 are heated by the adhesive heating means 200 so as to be stably and uniformly The separation protrusions 100-2 protruding from the bottom of the lamina member 101 at the bottom of the laminated core 100 constituting the next 15 laminated cores 100 and the first laminated core 100 of the first 15 laminated cores 100, Since the contact area of the laminar member 101 of the laminated member 100 with the upper synthetic adhesive film 100A 'is very narrow, the adhesive force is very weak, so that the laminated member is easily separated every 15 sheets, When the core 100 is discharged, it is discharged separately every 15 sheets.

12, a laminated core separating process according to another embodiment of the present invention will be described in detail with reference to FIGS. 10 and 12. FIG.

In the case where the laminated core 100 in which 15 sheets are stacked by the drive program installed in the control device 40 to be described later is manufactured for the 15th strip 100A (step (a) of FIG. 12) After the piercing process, one or more protrusions 100-2 are attached to the strip 100A for interlocking and transporting the fixed die 31 having the protruding portion 31A and the vertically moving die 32 having the recessed portion 31A A blanking process is performed in which the laminar member 101 is obtained by protruding downward (step (b) of Fig. 12), and the outer shape of the core is obtained from the strip 100A in which the protrusion 100-2 protrudes 12 (c)).

Fourteen Lamina members 101 without punched protrusions 100-2 are laminated through a repetitive blanking process to form a laminated core. On the top of the fourteen laminated cores, (Step (d) of Fig. 12).

Next, a lamina member having no protrusion 100-2 is successively further stacked on the lamina member having the protrusion 100-2 (step (e) of Fig. 12). The laminar member having the projection 100-2 is subjected to pressure from the upper and lower laminar members due to the pressing force of the laminar member on the upper side. The shape of the projection 100-2, which is lowered by this pressure, is deformed similarly to the upward folding. By this deformation, the lamina member having the projection 100-2 is separated without being adhered to the upper lamina member (step (f) of Fig. 12).

An individual laminated core having fifteen pieces that pass through the squeeze ring 14 through such steps can be obtained as a final product.

Here, although not shown in FIG. 4, a rotation driving device (not shown) may be provided, and the rotation driving device may include a rotating die (not shown) before the punched laminar member 101 is bonded in the blanking die 11 And is rotated at a predetermined angle in the circumferential direction. As a result, it is possible to eliminate the influence of minute thickness variations that may occur between the sheets of the lamina members 101.

A squeeze ring 14 installed in a lower mold for pushing a lamina member 101 by a predetermined number of times to closely contact lamina members 101 and discharging the laminated core 101 bonded; 5 and 6, the adhesive heating means 200 including the squeeze ring 14 and the magnetic shielding means 300 provided around the outer periphery of the adhesive heating means 200 will be described in detail.

The adhesive heating means 200 is a high frequency induction heating type in which a high frequency induction coil 210 is wound around the outer surface of the squeeze ring 14 and a high frequency induction coil 210 is wound around the high frequency induction coil 210, The laminated lamina member 101 in the squeeze ring 14 is heated by the magnetic field to supply the synthetic resin adhesive film 100A or the synthetic resin adhesive coating layer 100A deposited on the surface of each lamina member 101, The laminar member 101 and the laminar member 101 are allowed to adhere to each other.

The high frequency current to be supplied to the high frequency induction coil 210 is controlled by a control program installed in the microprocessor in the control device 40 so that the laminated lamina members 101 are arranged inside the squeeze ring 14 It is possible to detect the internal temperature by means of a temperature sensor (not shown) provided inside the adhesive heating means 200 and confirm the heating temperature through the display window, The heating time and the heating temperature of the adhesive heating means 200 can be controlled and controlled according to the melt temperature specification of the selected synthetic resin adhesive film 100A.

The adhesive heating means 200 may be configured such that the laminar member 101 laminated inside the squeeze ring 14 is made of a metal conductor while the squeeze ring 14 is used as a core (bobbin) When a high frequency current is caused to flow through the wound high frequency induction coil 210, an eddy current is generated near the surface of the laminated laminate member 101, and the laminated member 101 is heated by the heat of the eddy current loss.

The laminar member 101 and the laminar member 101 laminated inside the squeeze ring 14 are formed by rapidly melting the synthetic resin adhesive film 100A due to rapid heat generation of the lamina member 101, The film 100A and the back surface of the lamina member 101 are adhered to each other and the entire film synthetic resin adhesive film 100A deposited on the entire surface of the lamina member 101 is uniformly melted and adhered in a more solid state.

The magnetic field shielding means 300 is installed on the outer periphery of the adhesive heating means 200 to prevent the magnetic field generated from the high frequency induction heating type adhesive heating means 200 from leaking to the outside, 1) It is possible to prevent an error caused by an electric field leaking from electronic devices and devices installed in the periphery.

It is preferable that the magnetic shielding means 300 is formed of a cylindrical body made of aluminum or copper and the inner surface of the cylindrical body 310 constituting the magnetic shielding means 300 and the adhesive heating means 200 constituting the adhesive heating means 200 Frequency induction coil 210. The upper and lower portions of the cylindrical body 310 are connected to the lower mold 4 and the leaked magnetic field is applied to the lower mold 4 through the cylindrical body 310, (Grounded) to prevent magnetic field leakage.

That is, although the magnetic field generated by the adhesive heating means 200 can be canceled by the cylindrical body 310 made of aluminum or copper, in order to further prevent the leakage of the generated magnetic field, the cylindrical body 310 and the high frequency And the magnetic field is bypassed to the lower mold 4 through the cylindrical body 310 to prevent leakage to the outside of the magnetic shielding means 300. [

Cooling means 400 having a cooling water passage 440 connected to the supply pipe 420 and the recovery pipe 430 of the cooling water storage tank 410 is formed around the cylindrical body 310 of the magnetic field shielding means 300, Can be provided. A movable pump 450 may be installed in the supply pipe 420 or the return pipe 430. The cooling means 400 having such a configuration is provided to prevent the heat of the high temperature generated by the adhesive heating means 200 from being transmitted to the outside of the mold apparatus 1 of the present invention to adversely affect peripheral equipment, The circulation operation of the cooling water circulating through the adhesive heating means 440 can be made to circulate for a certain period of time during or after the operation time of the adhesive heating means 200. [

Of course, in the adhesive heating means 200 of the present invention by the high-frequency induction heating method, the high temperature generated by the heat generated in the squeeze ring 14 may not be transmitted to the outside. However, (400), and it is preferable not to install the cooling means (400) when it is unnecessary to install the cooling means (400) if necessary.

The present invention with such a structure is characterized in that the apparatus for manufacturing a heat adhesive laminated core according to the present invention comprises an upper mold 3 and a lower mold 4 and a punch mounted on the upper mold 4 A mold apparatus 1 for forming a sheet of laminar member 101 through a stamping process and a blanking process of a strip 100A coated with synthetic resin for vapor deposition or adhesion and a synthetic resin adhesive film 100A ' ; A squeeze ring (14) installed in a lower mold for pushing a blanked lamina member (101) by a predetermined number of times to closely contact lamina members (101) and discharging laminated cores bonded to each other; Adhesive heating means (200) including the squeeze ring (14); A magnetic shielding means (300) provided around the outside of the adhesive heating means (200); And a laminated core separating protrusion forming device 30 on the upper and lower molds 3 and 4 between the piercing and blanking processes.

The present invention having such a structure uses a strip 100A in which a synthetic resin adhesive film 100A 'is coated with a synthetic resin for vapor deposition or adhesion, and the lamina member 101 obtained by punching and blanking the strip 100A, The laminar member 101 stacked inside the squeeze ring 14 is rapidly heated by the adhesive heating means 200 which is a high frequency induction heating method and the heated laminar member The synthetic resin film 100A or the synthetic resin coating layer deposited on the surface of the laminar member 101 by the member 101 is melted to melt the synthetic resin film 100A on the surface of the laminar member 101 and the metal layer on the back surface of the laminar member 101 Frequency induction heating system in which a predetermined number of laminated cores 100 bonded to each other are completed and the laminated core 100 and the laminated core 100 adhered in the predetermined number are separated and discharged in a predetermined number Heating methods because it is made of a fast bonding process without a separate adhesive applying step, which will be a robust and stable than the bond made. Furthermore, the laminated core 100 according to the present invention is not an apparatus for producing a laminated core by an apparatus for producing a laminated core by embossing, but an induction heating system using a high frequency induction coil 210, The expansion coefficient of the laminar member 101 becomes constant, the loss of iron loss and magnetic flux density is greatly reduced, and the shape tolerance and the fastening strength such as the right angle and the flatness are excellent, The efficiency of the laminated core 100 of the motor is improved.

Meanwhile, in the present invention, the adhesive heating means 200 by the high-frequency induction heating method is provided for the adhesion of the laminated lamina member 101. However, as in the embodiment shown in FIGS. 7 and 8, The present invention can be carried out by a heat bonding method by a heater method.

That is, the adhesive heating means 200 may be a ceramic heater heating system in which a PTC ceramic heater (a positive temperature coefficient thermistor) 220 is provided on the outer circumferential surface of the squeeze ring 14 with an interval or the squeeze ring 14 is made of ceramics The ceramic may be replaced with a heater, and the ceramic may be made of silicon carbide or silicon nitride. Of course, the adhesive heating means 200 can be constructed by increasing the inner diameter of the squeeze ring 14 and joining the PTC ceramic heater 220 to the inner wall surface of the squeeze ring 14. In this case, The inner diameter of the die 11 and the inner diameter of the PTC ceramic heater 220 can be made to coincide with each other.

The PTC ceramic heater 220 is rapidly heated by the power supply to heat the squeeze ring 14 so that the number of stacked lamina members 101 gathered inside the squeeze ring 14 And the synthetic resin adhesive film 100A or the synthetic resin adhesive coating layer deposited on the surface of each lamina member 101 is melted to cause the lamina member 101 and the lamina member 101 to adhere to each other.

If the PTC ceramic heater 220 installed in the squeeze ring 14 is heated, the synthetic resin adhesive film 100A deposited on the lamina member 101 located on the inner peripheral surface of the PTC ceramic heater 220 is heated Can be melted.

The reason for providing the adhesive heating means 200 by the PTC ceramic heater 220 in the present invention is that the PTC ceramic heater 220 is quickly heated at the same time as power is supplied to shorten the bonding time, It maintains a constant temperature so as to stably perform adhesion, and also to reduce power consumption and fire hazard due to high temperature.

The power supplied to the PTC ceramic heater 220 is detected by a control program installed on a microprocessor (not shown) when the stacked lamina members 101 are assembled in the squeeze ring 14 And the internal temperature is detected by a temperature sensor (not shown) provided inside the adhesive heating means 200 and confirmed through the display window to enable confirmation of the heating temperature, or the heating time or the selected synthetic resin adhesive film The heating time and the heating temperature of the bonding heating means 200 can be controlled and controlled according to the melting temperature specification of the heating means 100A.

The laminar member 101 and the laminar member 101 laminated inside the squeeze ring 14 can quickly melt the synthetic resin adhesive film 100A by the heating of the PTC ceramic heater 220, And the whole film synthetic resin adhesive film 100A deposited on the entire surface of the lamina member 101 is uniformly melted and adhered in a more solid state.

The heat insulating wall 400 'of the cylindrical body is provided without the magnetic shielding means 300 on the outer side of the adhesive heating means 200 so that the heat of high temperature generated from the adhesive heating means 200 is transferred to the mold It is possible to prevent the peripheral device from being adversely affected by being transmitted to the outside of the device 1.

The heat insulating wall 400 'may form and provide a cooling water passage 440 connected to the supply pipe 420 and the recovery pipe 430 of the cooling water storage tank 410. A movable pump 450 may be installed in the supply pipe 420 or the return pipe 430. The heat insulating wall 400 'having such a structure prevents the heat of the high temperature generated by the adhesive heating means 200 from being transmitted to the outside of the mold apparatus 1 of the present invention to adversely affect peripheral equipment, The circulation operation of the cooling water circulating in the passage 440 can cause circulation operation during or after the operation time of the bonding heating means 200 for a certain period of time. Here, since the heat insulating wall 400 'must quickly absorb heat inside the apparatus and cool it, it is preferable to apply aluminum, brass, or bronze-based metal materials having high thermal conductivity.

In the description of the present invention, the separate protrusion forming process is described in connection with the apparatus for heating the squeeze ring, but the separate protrusion forming process does not necessarily apply to this type of apparatus. It is a matter of course that the separable protrusion forming process and the device structure thereof can be applied to a conventional adhesive core manufacturing apparatus.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is to be understood that the foregoing description is merely illustrative of the present invention and that the scope of the present invention is defined by the claims set forth below and that all changes and modifications that come within the scope of the present invention are included in 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 14: Squeeze ring
15: die backing plate 16: die holder
17: Punch plate 18: Punch backing plate
19: Punch holder 20: Stripper plate
30: Device for forming a protrusion for separating laminated core 31 '
31: Fixing die 32 ': Projection
32: vertically moving die 40: control device
100: laminated core 100A: strip
100A ': synthetic resin adhesive film 100: laminated core
200: Adhesive heating means 210: High frequency induction coil
220: PTC ceramic heater 300: magnetic field shielding means
310: Cylinder body 400: Cooling means
410: cooling water storage tank 420: supply pipe
430: Collection pipe 440: Cooling water passage
450: movable pump

Claims (2)

A method for manufacturing a laminated core (100) in which n number of laminated layers are bonded,
laminating n lamina members;
(n + 1) -th strip 100A so as to protrude at least one protrusion 100-2 upward;
Blanking a lamina member (101) having at least one protrusion from a strip (100A) protruding from the protrusion (100-2);
(N + 2) th lamina member is blanked on an upper part of the lamina member 101 having at least one protrusion formed therein, and the (n + 2) th lamina member is laminated on the lamina member having the at least one protrusion Presses the member (101);
The shape of the upward protrusion 100-2 of the lamina member 101 formed with at least one protrusion is deformed into a downwardly folded shape;
The lamina member having the projection is separated without being bonded to the n-th lamina member;
≪ / RTI > further comprising the step of: A method for manufacturing a laminated core (100) in which n number of laminated layers are bonded,
(n-1) laminar members are stacked;
at least one protrusion (100-2) protrudes downward from the nth strip (100A);
Blanking a lamina member (101) having at least one protrusion from a strip (100A) protruding from the protrusion (100-2);
(N + 1) th lamina member is blanked on an upper part of the lamina member 101 having at least one protrusion formed therein, and the (n + 1) th lamina member is laminated on the lamina member having the at least one protrusion Presses the member (101);
The shape of the downward protrusion (100-2) of the lamina member (101) having at least one protrusion formed therein is deformed into an upward wrinkle shape;
The lamina member having the projections is separated without being adhered to the (n + 1) th lamina member;
≪ / RTI > further comprising the step of:

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