Stator core shaping and flattening die

Abstract

The utility model relates to the technical field of stator core punch forming, in particular to a stator core shaping and flattening die. The utility model provides the stator iron core shaping and flattening die with an improved structure. The device comprises an upper die assembly, a lower die assembly and a positioning piece I, wherein the upper die assembly can be driven by a hydraulic device to do reciprocating rectilinear motion; the lower die assembly is arranged opposite to the upper die assembly and is matched with the upper die assembly for use; and the positioning piece I is used for accurately aligning the upper die assembly and the lower die assembly. In the process of extruding and leveling the sheet-shaped iron core, the perpendicularity and the concentric size of the iron core in the extruding process can be kept through the mold cavity, and the iron core can be stably extruded under the guide of the guide column to the mold head; the shaped iron core can be automatically jacked upwards and discharged through a nitrogen spring, and use is convenient; therefore, the mold can effectively guarantee the flatness of the groove shape of the iron core and the flatness of the groove wall, and therefore the machining quality of the iron core can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of stamping and forming of stator cores, and specifically relates to a shaping and flattening die for a stator core. Background Art

[0002] The stator and rotor cores are one of the core components of an electric motor and are composed of silicon steel sheets with high magnetic permeability. The quality, thickness, and shape of the stator and rotor cores directly affect the performance and efficiency of the electric motor.

[0003] Currently, when stamping and processing the silicon steel sheet cores of stators and rotors, an advanced self-locking and overlapping stamping technology is usually introduced. Due to problems such as dimensional accuracy, burrs, and protruding lamination buckling points that may occur during the stamping process of the core, in order to improve the defects of the core, a shaping and flattening die is often used to process the core to ensure the dimensions of the core height, flatness, perpendicularity, and concentricity. However, the structure of the existing shaping and flattening die for processing the core is often relatively simple, and it is difficult to fully guarantee the quality of shaping and flattening the core.

[0004] In view of this, it is very necessary to propose a shaping and flattening die for a stator core with an improved structure, aiming to solve the above technical problems. Summary of the Utility Model

[0005] In order to overcome the defect that the structure of the existing shaping and flattening die is relatively simple and it is difficult to fully guarantee the processing quality of shaping and flattening the core, the technical problem is to provide a shaping and flattening die for a stator core with an improved structure.

[0006] A shaping and flattening die for a stator core includes an upper die assembly that can make a reciprocating linear motion driven by a hydraulic device, a lower die assembly that is oppositely arranged and used in combination with the upper die assembly, and a positioning member one for accurately positioning the upper die assembly and the lower die assembly. The upper die assembly includes a die head, a guide post, and a screw one. The die head is installed on the hydraulic device, and the guide post is fixedly connected to the bottom of the die head through the screw one. The upper die assembly includes a die core, a die cavity, an elastic component, a die backing plate, a die bottom plate, a screw two, a screw three, and a screw four. The lower end of the guide post is movably inserted with a die cavity for positioning the core. The bottom of the die cavity is connected to the die backing plate through the screw two. The bottom of the die backing plate is fixedly connected to the die bottom plate through the screw four. A die core is movably arranged in the middle of the die cavity. A core is sleeved on the die core, and when the die head moves downward, the core can be extruded. The bottom of the die core is fixedly connected to the elastic component through the screw three, and the elastic component is located between the die backing plate and the die bottom plate.

[0007] Further, a positioning groove adapted to the iron core is provided at the inner bottom of the die head.

[0008] Further, a second positioning member is further included, and a second positioning member adapted to the die backing plate is provided on the die bottom plate.

[0009] Further, both the first positioning member and the second positioning member are MLP positioning pins.

[0010] Further, the elastic component is a nitrogen spring.

[0011] Further, a mounting plate is further included, and the die bottom plate is mounted on the mounting plate.

[0012] Further, a card slot is provided on the die bottom plate in a diagonal structure.

[0013] The beneficial effects of the present utility model are as follows: during the process of extruding and flattening the sheet-shaped iron core, the die cavity helps to maintain the perpendicularity and concentric dimension of the iron core during the extrusion process, and the iron core can be smoothly extruded under the guidance of the guide pillar for the die head; the nitrogen spring can automatically lift the shaped iron core upward for discharging, which is convenient to use; thus, this die can effectively ensure the flatness of the iron core groove shape and the flatness of the groove wall, thereby being beneficial to improving the processing quality of the iron core. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a three-dimensional structural schematic diagram of the present utility model.

[0015] Figure 2 is a right view of the present utility model.

[0016] Figure 3 is a cross-sectional view of the present utility model.

[0017] Figure 4 is a structural separation diagram of the present utility model.

[0018] Figure 5 is a schematic diagram of the connection structure of multiple die bottom plates and the mounting plate of the present utility model.

[0019] Markings in the drawings: 1: first screw, 2: die head, 3: guide pillar, 4: second screw, 5: iron core, 6: first positioning member, 7: third screw, 8: die core, 9: die cavity, 10: elastic component, 11: die backing plate, 12: die bottom plate, 13: second positioning member, 14: fourth screw, 15: mounting plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following is only a preferred embodiment of the present utility model, and the protection scope of the present utility model is not limited thereby.

[0021] Embodiment: The utility model provides a stator core shaping and flattening die, see Figures 1 to 5 As shown, it includes an upper mold assembly, an upper mold assembly and a positioning member 6. The upper mold assembly includes a mold head 2, a guide column 3 and a screw 1. The mold head 2 is installed on a hydraulic device. A positioning groove adapted to the iron core 5 is provided at the bottom of the mold head 2, which is conducive to the purpose of stable positioning when the iron core 5 is extruded; the guide column 3 is fixed to the bottom of the mold head 2 by a screw 1, and the upper mold assembly includes a mold core 8, a mold cavity 9, an elastic component 10, a mold pad 11, a mold bottom plate 12, a screw The guide column 3 is provided with a mold cavity 9 for positioning the iron core 5, and the bottom of the mold cavity 9 is connected to a mold pad 11 through a screw 24, and the bottom of the mold pad 11 is fixedly connected to a mold bottom plate 12 through a screw 4. The mold bottom plate 11 also includes a mounting plate 15, and the mold bottom plate 12 is mounted on the mounting plate 15, which can perform shaping and flattening processing on multiple groups of iron cores 5 at the same time, thereby facilitating the processing efficiency of the iron core 5; and the mold bottom plate 12 is inclined The diagonal structure is provided with a card slot for installation and positioning, which is conducive to the convenient installation and removal of the mold base plate 12; a mold core 8 is movably provided in the middle of the mold cavity 9, and an iron core 5 is placed on the mold core 8, and the mold head 2 can move downward to extrude the iron core 5, and an elastic component 10 is fixedly connected to the bottom of the mold core 8 by screw three 7, and the elastic component 10 is located between the mold pad 11 and the mold base plate 12, and the elastic component 10 is a nitrogen spring, which has the characteristics of small size, large elasticity, long stroke, stable operation, precise manufacturing, and long service life; it also includes a positioning member 13, and a positioning member 13 that can be matched with the mold pad 11 is provided on the mold base plate 12, which can provide stability of connection between the mold pad 11 and the mold base plate 12, and the positioning member 1 6 and the positioning member 2 13 are both MLP positioning pins, which have the characteristics of high precision, high stability, easy installation and disassembly, etc. It can maintain a stable connection effect under various working conditions and improve the processing accuracy and assembly quality of the product.

[0022] When in use, place the shaping mold tooling in the middle of the hydraulic press, select the stroke to slowly drop to the bottom dead center and close it, first lock the upper mold assembly and hit it two to three times, then lock the lower mold assembly and adjust the closing height. Place the iron core 5 on the mold core 8 and press it into the mold cavity 9 until it reaches the bottom dead center. After the operation is completed, the nitrogen spring will push the extruded iron core 5 upward, so that the purpose of shaping and flattening the iron core 5 can be achieved.

[0023] The above embodiments are provided for those skilled in the art to implement or use the present utility model. Those skilled in the art can make various modifications or changes to the above embodiments without departing from the inventive concept of the present utility model. Therefore, the protection scope of the present utility model is not limited by the above embodiments, but should be the maximum scope that conforms to the innovative features mentioned in the claims.

Claims

1. A stator core shaping and flattening die, characterized in that: It includes an upper die assembly capable of making reciprocating linear motion driven by a hydraulic device, a lower die assembly arranged opposite to and used in cooperation with the upper die assembly, and a first positioning member (6) for accurately aligning the upper die assembly and the lower die assembly. The upper die assembly includes a die head (2), a guide pillar (3), and a first screw (1). The die head (2) is installed on the hydraulic device. The guide pillar (3) is fixedly connected to the bottom of the die head (2) through the first screw (1). The upper die assembly includes a die core (8), a die cavity (9), an elastic component (10), a die backing plate (11), a die bottom plate (12), a second screw (4), a third screw (7), and a fourth screw (14). The lower end of the guide pillar (3) is movably inserted with a die cavity (9) for positioning an iron core (5). The bottom of the die cavity (9) is connected to the die backing plate (11) through the second screw (4). The die backing plate (11) is fixedly connected to the die bottom plate (12) through the fourth screw (14). A die core (8) is movably arranged in the middle of the die cavity (9). An iron core (5) is sleeved on the die core (8). When the die head (2) moves downward, it can extrude the iron core (5). The bottom of the die core (8) is fixedly connected to the elastic component (10) through the third screw (7). And the elastic component (10) is located between the die backing plate (11) and the die bottom plate (12).

2. A stator core shaping and flattening die according to claim 1, characterized in that: A positioning groove adapted to the iron core (5) is formed at the inner bottom of the die head (2).

3. A stator core shaping and flattening die according to claim 1, characterized in that: It further includes a second positioning member (13). A second positioning member (13) adapted to the die backing plate (11) is arranged on the die bottom plate (12).

4. A stator core shaping and flattening die according to claim 3, characterized in that: Both the first positioning member (6) and the second positioning member (13) are MLP positioning pins.

5. A stator core shaping and flattening die according to claim 1, characterized in that: The elastic component (10) is a nitrogen spring.

6. A stator core shaping and flattening die according to claim 1, characterized in that: It further includes a mounting plate (15). The die bottom plate (12) is installed on the mounting plate (15).

7. A stator core shaping and flattening die according to claim 1, characterized in that: Slots are formed on the die bottom plate (12) in a diagonal structure.

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