KR-102962571-B1 - Motor core manufacturing process system

Abstract

The present invention aims to provide a motor core manufacturing process apparatus. The configuration of the present invention is characterized by including an index mold (130) into which a metal disc (20) for forming a motor core (10) is entered, and an index die (138) which is rotatably coupled to the index mold (130) and rotates a T-shaped core plate (13) formed by punching the metal disc (20) in a horizontal direction at a certain angle.

Inventors

• 이정우

Dates

Publication Date

20260508

Application Date

20251030

Claims (2)

1. An index mold (130) into which a metal disc (20) for forming a motor core (10) is entered, and It includes an index die (138) that is rotatably coupled to the index mold (130) and rotates a T-shaped core plate (13), formed by punching the metal disc (20), in a horizontal direction at a certain angle. When a plurality of T-shaped core plates (13) are stacked while the T-shaped core plates (13) are rotated by the rotation of the index die (138) of the index mold (130), the height of the T-shaped motor core (10) is configured to be uniform. The index mold (130) is configured such that an index upper mold (134) is vertically coupled to an index lower mold (132), and the index die (138) is rotatably coupled to the index lower mold (132), and the index die (138) is configured to rotate by a rotation drive unit. The above metal plate (20) is configured to enter between the upper surface of the index lower mold (132) and the lower surface of the index upper mold (134) of the index mold (130) by a feeding device, and A blanking punch (170) for punching the metal disc (20) to form a T-shaped core plate (13) is provided on the bottom surface of the index upper die (134) of the index die (138), and the index upper die (134) is raised by a lifting device so that the blanking punch (170) punches the metal disc (20) to form a T-shaped core plate (13). When the T-shaped core plate (13) of the 1st position and the T-shaped core plate (13) of the 2nd position are not rotated, the index die (138) is rotated based on the rotation center (CR) of the two T-shaped core plates (13) of the 1st position and the T-shaped core plate (13) of the 2nd position, so that the index die (138) is rotated 180 degrees based on the rotation center (CR) of the two T-shaped core plates (13) of the 1st position and the T-shaped core plate (13) of the 2nd position, the T-shaped core plate (13) of the 1st position is rotated to the 2nd position and the T-shaped core plate (13) of the 2nd position is rotated to the 1st position, and in this state, the next T-shaped core plate (13) of the 1st position is rotated 180 degrees to the 2nd position While the 2nd POSITION T-shaped core plate is stacked on top of the 1st POSITION T-shaped core plate that has been rotated 180 degrees, the next 2nd POSITION T-shaped core plate (13) is configured to be stacked on top of the 1st POSITION T-shaped core plate that has been rotated 180 degrees. A T-shaped core plate (13) blanked from the base metal plate (20) by the blanking punch (170) above the index die (138) enters the plate entry hole inside the blanking die (138BD). Since the diameter of the plate entry hole inside the blanking die (138BD) is relatively smaller than the distance between the left and right sides of the T-shaped core plate (13), and the squeeze ring below the blanking die (138BD) is also smaller than the distance between the left and right sides of the T-shaped core plate (13), the T-shaped core plate (13) does not fall straight down from the plate entry hole inside the blanking die (138BD), and the T-shaped core plate (13) blanked from the metal plate (20) can be stacked on top in the next sequence, the blanking die (138BD). It can be maintained in a state where it is stretched across the internal plate entry hole, and In this state, when the index die (138) is rotated at an angle of 180 degrees, the upper and lower portions of the T-shaped core plate (13) that was blanked first, which have relatively thinner thickness, are placed in a position where they can be stacked by coming into contact with the portion between the upper and lower portions of the T-shaped core plate (13) that is blanked from the base metal plate (20) that has relatively thicker thickness. In this state, when the metal plate (20) is blanked by the blanking knife by the lowering of the blanking punch (170), the next T-shaped core plate (13) is stacked on top of the T-shaped core plate (13) that had previously entered the plate entry hole inside the blanking die (138BD). Since the T-shaped core plate (13) already has a concave embossment (EB) formed downward from the upper surface by the embossing mold in the previous process step, as the T-shaped core plate (13) is stacked one by one from bottom to top, the male embossment (EB) protruding from the bottom surface of the upper T-shaped core plate (13) is forcibly fitted into the female embossment groove (EBG) concave from the upper surface to the bottom surface of the lower T-shaped core plate (13), a T-shaped motor core (10) can be formed by stacking multiple T-shaped core plates (13). The above T-shaped motor core (10) is configured to be discharged downwards through a plate entry hole penetrating the bottom surface of the index die (138), and The inside of the index die (138) is provided with a die-side hole penetrating through the upper and lower surfaces, and the blanking die (138BD) and the squeeze ring (138SR) are coupled to the die-side hole, so that they withstand pressure from the squeeze ring (138SR), and the diameter of the blanking die (138BD) is configured to be relatively smaller than the width of the uppermost T-shaped core plate (13). A T-shaped core plate (13) formed by blanking a base metal plate (20) by the blanking punch (170) is supported inside the blanking die (138BD), and in this state, blanking is continued so that the next blanked T-shaped core plate (13) is stacked on top of the lower T-shaped core plate (13), and the embossing (EB) on the lower side of the upper T-shaped core plate (13) is inserted into the concave embossing groove (EBG) of the upper T-shaped core plate (13) in a press-fit manner to be combined, thereby manufacturing a T-shaped motor core (10) in which multiple T-shaped core plates (13) are stacked, and configured so that the T-shaped motor core (10) can pass through the squeeze ring (138SR) and be discharged under the index die (138). It further includes a center positioning unit that positions the center point between two T-shaped core plates (13) and ensures that the same shape as before rotation is produced even when rotated at an angle of 180 degrees. The above-mentioned center positioning unit is, A rotation angle setting unit (162) that controls the index die (138) to rotate at a 180-degree angle by driving the rotation drive motor of the rotation drive unit, and It includes a rotation control unit (164) that controls the operation of the rotation angle setting unit (162) above, and The above rotation drive unit is, A timing pulley (142) coaxially coupled to the index die (138) above, and A timing belt (144) coupled to the outer surface of the timing pulley (142), and It includes an index cam drive (146) coupled to the timing belt (144), and The above index cam drive (146) is, An index rotation drive motor (146A) mounted on a support frame that supports the index mold (130), and It includes an index rotation driven pulley (146B) that is coaxially coupled to the bottom surface of the index die (138) and coupled to the timing belt (144), A motor core manufacturing process apparatus characterized by having a blanking knife (172) positioned on the bottom surface of a blanking punch (170) that is vertically movable above the index die (138), a press machine (182) supported by a support frame above the blanking punch (170) further provided, and a discharge push pin (184) connected to a cylinder rod of the press machine (182), wherein the discharge push pin (184) is configured to enter a pin lifting hole penetrating from the upper surface of the blanking punch (170) to the bottom surface of the blanking knife (172) and to emerge from the bottom surface of the blanking knife (172).
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Description

Motor core manufacturing process system The present invention relates to a motor core manufacturing process apparatus, and more specifically, to a motor core manufacturing process apparatus that enables index stacking even if the product has a different shape rather than an equal division angle, taking into account the current situation where index stacking has been performed only when the product is symmetrical when the T-shaped core plate, which is a product for forming a motor core, is rotated at an equal division angle. Generally, cores are used in motors, and as the iron core of the rotor or stator, they are components that significantly affect the performance of motors or generators. At this time, a technology is used to manufacture a laminated motor core having a structure in which T-shaped core plates are stacked and bonded in predetermined quantities by punching metal strips, such as electrical steel sheets, for the manufacture of motor cores. However, in a situation where the thickness of the raw material plate, that is, the thickness of the raw material plate supplied to form a T-shaped core plate by punching it to form a motor core, is not uniform, when the raw material plate is punched and laminated, as shown in FIG. 1, on one side only the punched part of the thick part of the T-shaped core plate (13) is laminated, and on the other side only the punched part of the thin part of the T-shaped core plate (13) is laminated, there is a problem that the thickness of the motor core (10) in which multiple T-shaped core plates (13) are laminated is not uniform. Therefore, there is an urgent need for a motor core manufacturing process device capable of manufacturing a uniform motor core (10) by laminating a T-shaped core plate (13) that does not produce a uniform shape when rotated around a central point, such as in a T-shape. FIG. 1 is a cross-sectional view showing a part of a motor core formed by stacking conventional T-shaped core plates. FIG. 2 is a plan view schematically showing the process of forming a T-shaped core plate on a metal disc by a motor core manufacturing process device according to the present invention. FIG. 3 is a drawing showing an enlarged view of the two T-shaped core plate sections illustrated in FIG. 2. FIG. 4 is a plan view schematically showing the process of stacking T-shaped core plates in multiple layers by changing the positions of the two T-shaped core plates by rotating the two T-shaped core plates shown in FIG. 2 by an angle of 180 degrees with respect to the center of rotation. FIG. 5 is a side view showing the structure of an index rotation drive motor and an index rotation driven pulley constituting an index lower die, a timing pulley, a timing belt, and an index cam drive of an index mold, which is a main part of the present invention. FIG. 6 is a side view showing the structure of an index mold and an index die part of a motor core manufacturing process device according to the present invention. FIG. 7 is a side cross-sectional view conceptually showing a state in which the height of a motor core is uniformly formed by index stacking a plurality of T-shaped core plates by a motor core manufacturing process device according to the present invention. FIG. 8 is a perspective view of a motor core formed by index stacking a plurality of T-shaped core plates by a motor core manufacturing process device according to the present invention. FIG. 9 is a drawing showing an enlarged cross-sectional view of the joining portion of the embossing and the embossing groove in a motor core formed by index stacking a plurality of T-shaped core plates by a motor core manufacturing process device according to the present invention. FIG. 10 is a cross-sectional view schematically showing the process of forming a motor core (10) by stacking a plurality of T-shaped core plates inside an index die by a motor core manufacturing process device according to the present invention. FIG. 11 is an enlarged view of the main part of FIG. 10, FIG. 12 is a conceptual drawing showing the structure of a rotation angle setting unit and a rotation control unit of a motor core manufacturing process device according to another embodiment of the present invention. FIG. 13 is an enlarged cross-sectional view showing the state in which a T-shaped core plate is laminated on a blanking die and a squeeze ring inside an index die illustrated in FIG. 12. FIG. 14 is a cross-sectional view schematically showing the structure of a blanking die, an ejection operating cylinder, and an ejection push pin, which are the main parts of a motor core manufacturing process apparatus according to another embodiment of the present invention. FIG. 15 is an enlarged view of the main part of FIG. 14, FIG. 16 is a cross-sectional view schematically showing the process of ejecting a motor core from a blanking die and a squeeze ring inside an index die by means of the ejection push pin shown in FIG. 14. Hereinafter, preferred embodi