TW201944702A - Laminated iron core and manufacturing method thereof capable of optimizing concentricity and roundness of laminated iron core and improving the dynamic balance performance of motor - Google Patents

Abstract

The invention provides a laminated iron core and a manufacturing method thereof, which is characterized in that the laminated iron core is formed by first rotating and dislocating each of the silicon steel sheets and then stacking and combining them, so that each of the silicon steel sheets on the laminated iron core is tightly combined with each other without clearance. The manufacturing method includes: (a) supplying a processing plate pulled out from the material feeding unwinder to a continuous mold; (b) performing a stamping processing by the continuous mold to obtain a silicon steel sheet provided with an annular portion and composed of a plurality of components arranged circumferentially; and (c) using a mold to rotate each of the silicon steel sheets of different layers by a fixed angle, and stacking and combining the silicon steel sheets on the laminated iron core having the same annular shape so as to make the thickness of each silicon steel sheet of the laminated iron core to be even. Because each of the silicon steel sheets may have different thickness, which may be several millimeters, a mold is used to rotate each of the silicon steel sheets of different layers by a fixed angle and then stack and combine them, so that the laminated iron core may have an even accumulated thickness. Thus, the concentricity and roundness of the laminated iron core can be optimized, and the dynamic balance performance of a motor can be enhanced, so as to improve the output efficiency of the motor.

Description

Laminated iron core and manufacturing method thereof

The invention relates to the technical field of motor cores, in particular to a laminated core and a manufacturing method thereof.

Since the beginning of the development of the industrial revolution in the eighteenth century, the first prototype of a motor that operated on the principle of simple electricity was introduced in Scotland. In the nineteenth century, the motor industry began to receive attention. In the twentieth century, the motor industry began to flourish, and various types of motors were gradually developed. Nowadays, motors have played an indispensable role in the industry. Therefore, the motor is often called the "industrial heart". With the rapid development of industry and the increasing demand for precision, motor design and manufacturing must also be more accurate and fast.

Generally, the motor includes an iron core. The iron core is manufactured by using a steel plate (A) with high magnetic permeability as the material for the iron core and feeding it into the punching machine. A plurality of steel plates (A) cut into a core shape are stacked and integrated along the thickness direction of the steel plates to form a laminated core (C).

However, in the above-mentioned prior art, the end face (B) of each steel plate (A) punched into a core shape by a punching machine is prone to the problem of parallelism deviation (see FIG. 1). Deviations will result in cumulative tolerances when each steel plate (A) is stacked and combined, resulting in insufficient lamination of the manufactured laminated core (C), and large errors in concentricity and roundness, which will cause the output efficiency of the motor to not be It is necessary to improve.

In view of this, how to improve the above problems, develop a laminated iron core that can optimize the concentricity and roundness of the laminated iron core and increase the performance of the motor's dynamic balance, thereby improving the output efficiency of the motor and a manufacturing method thereof , Has become the idea and research topic of the creator of this invention.

In order to solve the above technical problems, the present invention discloses a laminated iron core, which is characterized in that the laminated iron core (10) is formed by stacking and combining each silicon steel sheet (1) after being rotated and displaced to make the laminated iron core Each silicon steel sheet (1) on the core (10) is tightly bonded without a gap.

A method for manufacturing a laminated iron core, the manufacturing method is as follows: (a) supplying a processed plate (20) pulled out from a feeding and unwinding machine (100) to a continuous die (200); (b) passing the continuous The die (200) is punched to obtain a silicon steel sheet (1) composed of a plurality of components (11) arranged in a circumferential direction and having a ring portion (12); and (c) are connected to each other at the component (11). The part is pre-broken, and the leveling and back pressure is performed in the next step. At the same time, each piece of silicon steel sheet (1) with different layers is rotated and displaced by using a mold (300), and the laminated core is of the same shape in the ring shape. Stacking combined.

Further, the pre-breaking between the components (11) can be implemented by shear bending processing or stamping processing.

Further, the manufacturing method includes, before forming the annular portion (12) by punching the outer periphery of the silicon steel sheet (1), sequentially including the following steps: (b1) forming the inner portion of the annular portion (12) A step of opening (13); and (b2) a step of forming a plurality of pre-break lines (2) in the area of the annular portion (12).

According to the above technical means, the laminated core manufactured by the manufacturing method of the laminated core of the patent of the present invention has the following characteristics:

1. Solve the problem of cumulative tolerance caused by the stacking and bonding of each silicon steel sheet, resulting in insufficient lamination of the manufactured laminated cores, thereby optimizing the concentricity and roundness of the laminated cores.

2, can increase the performance of motor dynamic balance, thereby improving motor output efficiency.

1‧‧‧ silicon steel sheet

11‧‧‧ components

12‧‧‧ Ring

13‧‧‧ opening

2‧‧‧ pre-disconnect

10‧‧‧ laminated core

20‧‧‧ processed board

100‧‧‧Feeding and unwinding machine

200‧‧‧ continuous die

300‧‧‧mould

A‧‧‧ steel plate

B‧‧‧face

C‧‧‧ laminated core

Fig. 1: Schematic diagram of stacking defective steel plates with conventional laminated cores.

FIG. 2 is a schematic perspective view of a laminated core according to the present invention.

FIG. 3 is a schematic diagram of the silicon steel sheets of the present invention implemented after being rotated and displaced to form a laminated core.

FIG. 4 is a schematic plan view of the manufacturing method of the present invention.

FIG. 5 is a schematic plan view of a silicon steel sheet according to the present invention.

FIG. 6 is a schematic plan view of an opening formed by a silicon steel sheet according to the present invention through stamping.

Fig. 7: A schematic plan view of the pre-break line formed by the silicon steel sheet of the present invention through stamping.

FIG. 8 is a schematic diagram of implementation of forming a pre-break line between components of the present invention.

The following is a detailed description based on the embodiment shown in the figure. As shown in Figures 2 and 3, the laminated iron core of the present invention is disclosed in the figure. The laminated iron core (10) is composed of each silicon steel sheet. (1) It is formed by stacking after rotating and dislocation, so that each silicon steel sheet (1) on the laminated iron core (10) is tightly connected without gaps; in this way, each silicon steel sheet (1) After stacking and combining, no cumulative tolerance will be generated to achieve good adhesion, thereby optimizing the concentricity and roundness of the laminated core of the present invention, and increasing the performance of motor dynamic balance, thereby improving the output efficiency of the motor.

As shown in FIGS. 4 to 8, the drawing reveals a method for manufacturing a laminated core. The manufacturing method is as follows: (a) a processed plate (20) pulled out from a feeding and unwinding machine (100); ) Is supplied to the continuous die (200); (b) through the continuous processing of the continuous die (200), a silicon steel sheet (1) composed of a plurality of components (11) arranged in a circumferential direction and having a ring portion (12) is obtained [Please refer to figure 5]; and (c) perform pre-breaking at the parts where the component (11) is connected, and perform leveling back pressure in the next step [see figure 8], while After the silicon steel sheets (1) of different layers are rotated and displaced by a mold (300), they are stacked and combined on the laminated core (10) of the same shape in a ring shape.

Among them, each silicon steel sheet (1) can be fastened and bonded by riveting, bonding, welding or resin material. The foregoing connection method is not intended to limit the connection method of each piece of silicon steel sheet (1) of the present invention. It is only a reference example, and is not the only example of implementation. Except for the aforementioned riveting, bonding, welding or resin materials, each piece of silicon steel Other connection methods can also be used as a combination between the pieces (1). Therefore, as long as the creative intention is equal to the connection method of the present invention, the changed or modified design should fall within the patent scope of the present invention.

The above figures 6 and 7 reveal that before forming the annular portion (12) by punching the outer periphery of the silicon steel sheet (1), the following steps are sequentially included: (b1) forming the annular portion (12 ) A step of opening the inner side (13); and (b2) a step of forming a plurality of pre-break lines (2) in the area of the annular portion (12).

Among them, it is revealed in FIG. 8 that the end of the component (11) is displaced in the thickness direction of the processed plate (20), forming the pre-break line (2) in the step (b2) above. The end of 11) is displaced in the thickness direction of the processed plate (20), so that the deformation generated by the component (11) can be made smaller. In this way, the laminated core of the present invention can have a very superior Of magnetic.

Secondly, as long as the pre-break line (2) is formed, the end of the component (11) is displaced in the thickness direction of the processed plate (20), the formation of the pre-break line (2) can be passed. Shear bending or press working is performed.

The structure, features, and effects of the present invention are described in detail based on the embodiments shown in the drawings. However, the above are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. The corresponding modification changes should be included in the patent scope of the present invention as long as they are within the scope of equal effects.

Claims (4)

    A laminated iron core is characterized in that the laminated iron core (10) is formed by rotating and displacing each silicon steel sheet (1), so that each piece of silicon steel sheet on the laminated iron core (10) (1) There is no gap between the tight joints.         A method for manufacturing a laminated core according to claim 1, comprising the following steps: (a) supplying the processed plate (20) pulled out from the feeding and unwinding machine (100) to a continuous die (200); b) through the continuous processing of the continuous die (200), a silicon steel sheet (1) composed of a plurality of components (11) arranged in a circumferential direction and having a ring portion (12) is obtained; and (c) the components are respectively located in the component (11) The connected parts are pre-breaked, and the leveling back pressure is performed in the next step. At the same time, each piece of silicon steel sheet (1) with different layers is rotated and displaced by using a mold (300), and the same shape in the ring Laminated cores are stacked and combined.         The method for manufacturing a laminated core according to claim 2, wherein the pre-breaking between the components (11) can be performed by a shear bending process or a stamping process.         The method for manufacturing a laminated core according to any one of claims 2, 3, or 4, wherein before the ring-shaped portion (12) is formed by punching the outer periphery of the silicon steel sheet (1), In this order, the following steps are included: (b1) a step of forming the inner opening (13) of the ring portion (12); and (b2) a step of forming a plurality of pre-break lines (2) in the region of the ring portion (12).