Stator tooth forming scheme of stator yoke-free axial flux motor

Abstract

The stator tooth forming scheme of the stator yoke-free axial flux motor comprises the following steps: 1) cutting a silicon steel sheet raw material into a silicon steel sheet coil material with the same width as that of a stator tooth by using a material cutting machine; (2) the silicon steel sheet coil stock is put into a stamping die to be stamped, and the feeding distance and the horizontal direction of the silicon steel sheet coil stock are controlled by a high-precision servo motor according to the radial size of the stator tooth stamped sheet; 3) stacking the stator tooth punching sheets of different sizes obtained by punching in a stacking die in sequence; and 4) pressing the silicon steel sheets by a hydraulic machine to obtain the stator teeth and riveting and fastening the stator teeth.

Description

Technical Field

[0001] The present invention relates to the technical field of flux motors, and particularly to a forming solution for stator teeth of a statorless yoke axial flux motor. Background Art

[0002] In the field of axial flux motors, when there is no magnetic yoke part in the stator core, the stator is decomposed into individual stator teeth. Due to the fact that the dimensions of the stator teeth gradually decrease from the outside to the inside, and the stator teeth are laminated from the outside to the inside, the dimensions of each stator tooth punching sheet are inconsistent, which brings great difficulties to the punching and lamination of the stator tooth punching sheets. Currently, most manufacturers use the method of integral forming with soft magnetic materials or machining with low-carbon steel to replace the laminated stator teeth. However, the stator teeth made by integral forming with soft magnetic materials or machining with low-carbon steel have disadvantages such as large eddy current losses, low magnetic permeability, and low motor efficiency. Summary of the Invention

[0003] The purpose of the present invention is to provide a forming solution for stator teeth of a statorless yoke axial flux motor in response to the corresponding deficiencies of the prior art. This forming solution can improve the punching efficiency and lamination efficiency of stator tooth punching sheets.

[0004] The purpose of the present invention is achieved by the following solution: A forming solution for stator teeth of a statorless yoke axial flux motor includes the following steps: 1) Use a shearing machine to cut the silicon steel sheet raw material into a silicon steel sheet coil with the same width as the stator tooth width; 2) Place the silicon steel sheet coil into a stamping die for stamping, and a high-precision servo motor controls the feeding distance and horizontal direction of the silicon steel sheet coil according to the radial dimension of the stator tooth punching sheet; 3) Stack the stator tooth punching sheets of different sizes obtained by stamping in sequence in a lamination die; 4) Use a hydraulic press to press the silicon steel sheets tightly to obtain stator teeth and rivet them tightly.

[0005] The stamping die is installed on a workbench, and a high-precision servo motor is arranged on the left side of the stamping die. The silicon steel sheet coil is placed on the left side of the high-precision servo motor.

[0006] A stator tooth punching sheet forming punch and a stator tooth riveting forming punch are arranged in the stamping die. The stator tooth punching sheet forming punch is consistent with the shape of the stator slot, and the stator tooth riveting forming punch is three vertically arranged rectangular punches.

[0007] In step 2, the high-precision servo motor controls the feeding distance of the silicon steel sheet coil according to the width of the stator tooth punching sheet required for the stator teeth in sequence, and different-sized stator tooth punching sheets are obtained by stamping with the stator tooth punching sheet forming punch and the stator tooth riveting forming punch.

[0008] In step 3, a manipulator is used to stack the stator tooth punching sheets.

[0009] The advantages of the present invention are as follows: when there is no yoke in the stator of the axial flux motor, the problems of blanking and stacking of independent stator tooth punching sheets are solved. The stator teeth laminated by silicon steel sheets have small eddy current loss, high magnetic permeability, and high motor efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the arrangement of the stamping dies of the present invention; Figure 2 It is a schematic diagram of the stamping process of the present invention; Figure 3 It is a schematic diagram of the stator tooth structure of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0011] As Figures 1 to 3 shown, a forming solution for the stator teeth of a stator yoke-free axial flux motor includes the following steps: 1) Use a shearing machine to cut the silicon steel sheet raw material into a silicon steel sheet coil with the same width as the stator tooth width; 2) Place the silicon steel sheet coil into the stamping die for stamping. A high-precision servo motor controls the feeding distance and the horizontal direction of the silicon steel sheet coil according to the radial dimension of the stator tooth punching sheet. The stamping die 3 is installed on the workbench 4. A high-precision servo motor 2 is arranged on the left side of the stamping die 3, and the silicon steel sheet coil 1 is placed on the left side of the high-precision servo motor 2. The stamping die 3 is provided with a stator tooth punching sheet forming punch 17 and a stator tooth riveting forming punch 16. The stator tooth punching sheet forming punch 17 has the same shape as the stator slot 302, and the stator tooth riveting forming punch 16 is three vertically arranged rectangular punches. The high-precision servo motor 2 controls the feeding distance of the silicon steel sheet coil according to the width of the stator tooth punching sheet required for the stator teeth in sequence, and different-sized stator tooth punching sheets are obtained by stamping with the stator tooth punching sheet forming punch 17 and the stator tooth riveting forming punch 16.

[0012] 3) Stack the different-sized stator tooth punching sheets obtained by stamping in sequence in the stacking die; use a manipulator to stack the stator tooth punching sheets.

[0013] 4) The hydraulic press compresses the silicon steel sheets to obtain the stator teeth and rivets them tightly.

[0014] The high-precision servo motor 2 feeds according to the size of the stator tooth punching sheet required for the stator teeth. For example, the first feeding distance is L 1 , and the first stator tooth punching sheet 18 is stamped; then the feeding distance is adjusted to L 2 , and the second stator tooth punching sheet 19 is stamped; then the feeding distance is adjusted to L 3, the third stator tooth punching sheet 20 is punched out; the feeding distance is adjusted successively according to the number of stator tooth punching sheets required for the stator teeth to obtain stator tooth punching sheets of different sizes. During the punching process, the stator tooth punching sheet is punched out by the stator tooth forming punch 17, and the riveting buckle groove is punched out by the stator tooth riveting forming punch 16.

[0015] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art can make modifications to the present invention without departing from the spirit of the present invention, and such modifications fall within the protection scope of the present invention.

Claims

1. A stator tooth forming scheme for a stator yokeless axial flux motor, characterized in that: The following steps are involved: 1) Use a shearing machine to cut the silicon steel sheet raw material into silicon steel sheet coils with the same width as the stator tooth width; 2) Place the silicon steel sheet coil into the stamping die for stamping, and the high-precision servo motor controls the feeding distance and horizontal direction of the silicon steel sheet coil according to the radial size of the stator tooth punching sheet; 3) Stacking the stamped stator tooth sheets of different sizes in sequence in a stacking die; 4) The hydraulic press presses the silicon steel sheets to obtain the stator teeth and rivets them tightly.

2. The stator tooth forming scheme of the stator yokeless axial flux motor according to claim 1 is characterized in that: The punching die (3) is mounted on a workbench (4), a high-precision servo motor (2) is arranged on the left side of the punching die (3), and the silicon steel sheet coil (1) is placed on the left side of the high-precision servo motor (2).

3. The stator tooth forming scheme of the stator yokeless axial flux motor according to claim 1 is characterized in that: The stamping die (3) is provided with a stator tooth punching sheet forming punch (17) and a stator tooth rivet forming punch (16); the stator tooth punching sheet forming punch (17) is consistent with the shape of the stator slot (302); and the stator tooth rivet forming punch (16) is three vertically arranged rectangular punches.

4. The stator tooth forming scheme of the stator yokeless axial flux motor according to claim 3 is characterized in that: In step 2, the high-precision servo motor (2) controls the feeding distance of the silicon steel sheet coil according to the width of the stator tooth punch required by the stator teeth, and the stator tooth punch forming punch (17) and the stator tooth rivet forming punch (16) are used to punch to obtain stator tooth punches of different sizes.

5. The stator tooth forming scheme of the stator yokeless axial flux motor according to claim 1 is characterized in that: In step 3, a robot is used to stack the stator tooth punchings.

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