CN114301244B

CN114301244B - Motor iron core punching sheet and manufacturing process thereof

Info

Publication number: CN114301244B
Application number: CN202111494280.2A
Authority: CN
Inventors: 李新桥
Original assignee: Jiangsu Jinguang Motor Technology Co ltd
Current assignee: Jiangsu Jinguang Motor Technology Co ltd
Priority date: 2021-12-08
Filing date: 2021-12-08
Publication date: 2023-04-25
Anticipated expiration: 2041-12-08
Also published as: CN114301244A

Abstract

The invention discloses a motor core punching sheet and a manufacturing process thereof, wherein the motor core punching sheet comprises an outer circular part and an inner toothed part of the motor core punching sheet, the inner ring of the outer circular part of the motor core punching sheet is provided with a notch, the outer circular part of the motor core punching sheet is provided with a rivet used for connecting a plurality of layers of punching sheets, motor stator teeth are provided with rivets II used for connecting the plurality of layers of punching sheets, and the inner toothed part of the motor core punching sheet is provided with a groove matched with the notch. The utilization rate of raw materials is improved to more than 75% from 40-50% originally, so that the cost of the raw materials is effectively reduced; the full rate of the motor groove is improved to about 80 percent by 70 percent, the motor performance is effectively improved, and the material consumption can be reduced by about 10 percent with the same performance.

Description

Motor iron core punching sheet and manufacturing process thereof

Technical Field

The invention relates to the field of electric vehicle motor manufacturing and related technologies, in particular to a motor iron core punching sheet and a manufacturing process thereof.

Background

The current motor iron core punching sheet manufacturing process adopts raw material plates to be directly punched and molded into an integral iron core punching sheet, the utilization rate of raw materials is only 40% -50%, the copper wire filling rate in a motor winding groove is low and is generally below 75%, and the direct problem brought by the low copper wire filling rate is that the cost of the motor iron core punching sheet is high, and the motor performance and the power density are not high.

Disclosure of Invention

In order to solve the defects in the prior art, the invention provides a motor iron core punching sheet and a manufacturing process thereof, and solves the problems in the prior art.

In order to achieve the above purpose, the invention adopts the following technical scheme:

a manufacturing process of a motor iron core punching sheet comprises the following manufacturing steps:

s1: processing the raw material plate by using a high-speed progressive die, and punching a plurality of square or round rivets;

s2: the raw material plate in the step S1 is treated by a high-speed progressive die again, and a plurality of trapezoid or dovetail groove-shaped openings are punched;

s3: the raw material plate punched in the step S2 is subjected to forming treatment by adopting bending stamping equipment of a stamping sheet after theoretical calculation according to key parameters of the outer diameter size, the number of slots, the material and the strength of a stator of the motor core, and is manufactured into an outer circular part of the motor core stamping sheet;

s4: aligning the rivet with the notch, and riveting a plurality of punching sheets by utilizing the rivet to form a whole;

s5: according to the shape and the size of the tooth-shaped part inside the motor core punching sheet, a positive-negative swing cloth method is adopted for arrangement;

s6: punching corresponding rivets II and grooves on a new raw material plate by using a high-speed progressive die, aligning the rivets II and the grooves by using the progressive die, and directly riveting a plurality of punching sheets into a whole by using the rivets II;

s7: the method comprises the steps of using a groove of a tooth-shaped part in a motor core punching sheet as a positioning or limiting part, installing the motor core punching sheet on an insulating framework, and winding required turns by using enamelled wires according to the requirements of a motor;

s8: and pressing the tooth-shaped part inside the motor core punching sheet with the wound wire into the round part outside the motor core punching sheet sequentially or together according to a motor winding rule to form the complete motor core.

Further, in the step S1, the square rivet specifications are 4mm long and 1mm wide, and the intervals between the high-speed progressive dies are 25mm-35mm.

Further, the circular rivet in the step S1 has a diameter of 2mm.

Further, the number of the rivets in the step S1 is equal to or half of the number of the tooth-shaped portions inside the motor core punching sheet.

Further, the number of the openings in the step S2 is equal to or integral multiple of the number of the tooth-shaped parts inside the motor core punching sheet.

Further, in the step S3, the diameter of the outer circular part of the electrode core sheet is 110-160mm.

Further, the number of grooves in the step S7 is twelve to twenty-four, and the grooves are divided into three groups, each group being four to eight.

Further, the specification of the enamelled wire in the step S7 is phi 0.51 mm-phi 1.5mm, and the winding requirement is five to twenty turns.

Furthermore, the winding rule of the motor in the step S8 adopts a UVW three-phase interval rule.

Further, including motor core towards the outside circular part of piece reaches motor core towards the inside profile of tooth part of piece, motor core towards the inside circle of the outside circular part of piece and be equipped with the opening, motor core towards the outside circular part of piece is equipped with and is used for connecting multilayer towards the piece rivet, motor stator tooth is equipped with and is used for connecting multilayer towards the piece rivet II, motor core towards the inside profile of tooth part be equipped with opening complex recess.

Compared with the prior art, the invention has the advantages that:

1. the utilization rate of raw materials is improved to more than 75% from 40-50% originally, so that the cost of raw materials is effectively reduced;

2. the full rate of the motor groove is improved to about 80 percent by 70 percent, the motor performance is effectively improved, and the material consumption can be reduced by about 10 percent with the same performance.

Drawings

FIG. 1 is a schematic diagram of a motor core lamination of the present invention;

FIG. 2 is a schematic view of an outer circular portion of a motor core lamination of the present invention;

FIG. 3 is a schematic view of the inner tooth of the motor core lamination of the present invention;

fig. 4 is a partial wiring diagram of the tooth form of the present invention.

Description of the embodiments

The following description of the embodiments of the present invention will be made in detail and with reference to the accompanying drawings, wherein it is apparent that the embodiments described are only some, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Examples

Motor core lamination outer circular portion 10: the raw material plates are punched with a plurality of rivets 11 with shapes such as a square shape with the length of 4mm and the width of 1mm or a circular shape with the diameter of 2mm and the like and a plurality of notches 12 with the shape of trapezoids or dovetails by utilizing a high-speed progressive die at a certain distance (generally 25mm-35 mm), the number of the rivets 11 is equal to or half of that of motor stator teeth 20, the number of the notches 12 is equal to or integral multiple of that of the motor stator teeth 20, key parameters such as the outer diameter size, the number of slots, the material, the strength and the like of a motor iron core stator are utilized, a motor punching sheet winding process is adopted, the outer diameter of the rolled rivet 11 is aligned with the notches 12, and a plurality of layers of punching sheets are riveted into a whole by utilizing the rivet 11.

Motor core lamination inner tooth 20: according to the designed shape and size (as shown in fig. 3), a typical layout method is a reverse layout method, in order to improve the material utilization rate, the raw material plate is punched with corresponding rivets II 22, grooves 21 and the like by using a high-speed progressive die, the progressive die aligns the rivets II 22 with the grooves 21, and a plurality of punching sheets are directly riveted into a whole by using rivets.

Winding scheme: the invention uses the groove 21 of the inner tooth-shaped part 20 of the motor core punching sheet as positioning or limiting, and installs the insulating skeleton 3, the motor core punching sheet is divided into 3 groups according to 12 slots (generally 12-24 slots), a certain number of 4 (generally 4-8) enamelled wires phi 0.51mm (generally phi 0.51 mm-phi 1.5 mm) are used for winding the required number of turns 6 (such as figure 4, generally 5-20 turns), the invention adopts but not limited to automatic equipment to directly wind wires, the production efficiency of motor winding is greatly improved, the filling rate of enamelled wires can be greatly improved, the inner tooth-shaped part 20 of the motor core punching sheet with wound wires is orderly or together pressed into the outer round part 10 of the motor core punching sheet according to the specified motor winding rule, and the complete motor core is formed.

Another winding scheme: the inner tooth-shaped part 20 of the motor core punching sheet is pressed into the outer circular part 10 of the motor core punching sheet in sequence or together according to the rule of UVW three-phase interval to form a complete motor core (as shown in figure 1), and then a traditional winding scheme is adopted to finish the manufacturing of the motor stator.

Although embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations may be made in the above embodiments by those skilled in the art without departing from the spirit and principles of the invention.

Claims

1. The manufacturing process of the motor iron core punching sheet is characterized by comprising the following manufacturing steps of:

s1: processing the raw material plate by using a high-speed progressive die, and punching a plurality of square or round rivets (11);

s2: the raw material plate in the step S1 is treated by a high-speed progressive die again, and a plurality of trapezoid or dovetail groove-shaped openings (12) are punched;

s3: the raw material plate punched in the step S2 is subjected to forming treatment by adopting bending and stamping equipment of a stamping sheet after theoretical calculation according to key parameters of the outer diameter size, the number of slots, the material and the strength of a stator of the motor core, and is manufactured into an outer circular part (10) of the motor core stamping sheet;

s4: aligning the rivet (11) with the notch (12), and riveting a plurality of punching sheets by using the rivet (11) to form a whole;

s5: according to the shape and the size of the tooth-shaped part (20) inside the motor iron core punching sheet, a positive-negative swing cloth method is adopted for arrangement;

s6: punching corresponding rivets II (22) and grooves (21) on a new raw material plate by using a high-speed progressive die, aligning the rivets II (22) and the grooves (21) by using the progressive die, and directly riveting a plurality of punching sheets into a whole by using the rivets II (22);

s7: the grooves (21) of the tooth-shaped parts (20) in the motor core punching sheet are used as positioning or limiting parts and are arranged on the insulating framework (3), and the required turns are wound by the enamelled wire according to the requirements of the motor;

s8: the inner tooth-shaped part (20) of the motor core punching sheet with the wound wire is pressed into the outer circular part (10) of the motor core punching sheet in sequence or together according to the motor winding rule to form the complete motor core.

2. The process for manufacturing the motor core punching sheet according to claim 1, wherein the square rivet (11) in the step S1 has a specification of 4mm long and 1mm wide, and the interval between the high-speed progressive dies is 25mm-35mm.

3. A process for manufacturing a motor core sheet according to claim 1, wherein the circular rivet (11) in step S1 has a diameter of 2mm.

4. A process for manufacturing a motor core sheet according to claim 1, wherein the number of rivets (11) in step S1 is equal to or half the number of tooth-shaped portions (20) inside the motor core sheet.

5. A process for manufacturing a motor core sheet according to claim 1, wherein the number of the openings (12) in the step S2 is equal to or integral multiple of the number of the tooth-shaped portions (20) inside the motor core sheet.

6. A process for manufacturing a motor core sheet according to claim 1, wherein the diameter of the outer circular portion (10) of the motor core sheet in step S3 is 110-160mm.

7. A process for manufacturing a motor core sheet according to claim 1, wherein the number of the grooves (21) in the step S7 is twelve to twenty-four, and is divided into three groups of four to eight.

8. The process for manufacturing a motor core sheet according to claim 1, wherein the specification of the enamelled wire in the step S7 is Φ0.51mm to Φ1.5mm, and the winding requirement is five to twenty turns.

9. The process for manufacturing the motor core punched sheet according to claim 1, wherein the motor winding rule in the step S8 adopts a UVW three-phase interval rule.

10. A motor core punching sheet according to claim 1, characterized by comprising the motor core punching sheet outer circular portion (10) and the motor core punching sheet inner toothed portion (20), wherein the inner ring of the motor core punching sheet outer circular portion (10) is provided with the notch (12), the motor core punching sheet outer circular portion (10) is provided with the rivet (11) for connecting the multi-layer punching sheet, the motor core punching sheet inner toothed portion (20) is provided with the rivet ii (22) for connecting the multi-layer punching sheet, and the motor core punching sheet inner toothed portion (20) is provided with the groove (21) matched with the notch (12).