Special-shaped stator iron core block welding pre-circle-splicing device

Abstract

The utility model discloses a special-shaped stator iron core block welding pre-circle-splicing device which comprises an arc-shaped unit splicing assembly and a splicing assembly, the arc-shaped unit splicing assembly comprises a semicircular welding tool, the semicircular welding tool is provided with a plurality of first positioning parts in the semicircular direction, and the splicing assembly is provided with a plurality of second positioning parts in the semicircular direction. The semicircular welding tool is further provided with a first welding seam located between every two adjacent first positioning parts in a penetrating mode. The circle splicing assembly comprises a circle splicing welding tool, the circle splicing welding tool is provided with at least two second positioning parts, the at least two second positioning parts are arranged side by side at intervals in the circle direction, and the circle splicing welding tool is further provided with a second welding seam located between every two adjacent second positioning parts in a penetrating mode. According to the device, after the special-shaped stator iron core blocks are pre-spliced into the pre-spliced semi-circular units through the semi-circular splicing assembly, the pre-spliced semi-circular units are spliced into the stator iron core through the circle splicing assembly, and then the special-shaped stator iron core blocks are spliced into the stator iron core.

Description

Technical Field

[0001] This application relates to the field of motor technology, specifically to a pre-assembly device for welding irregularly shaped stator core blocks. Background Technology

[0002] An electric motor is a device consisting of a stator winding and a rotor. When energized, the stator winding generates a rotating magnetic field. This rotating magnetic field acts on the rotor, creating a magnetoelectric torque that drives the rotor to rotate, thus converting electrical energy into mechanical energy. Both the energy conversion process and the mechanical energy driving process generate a large amount of heat, therefore, the motor needs to have good heat dissipation performance.

[0003] During the manufacturing process of an electric motor, the stator windings need to be assembled into the housing, and then the front and rear end covers are installed. The housing, front and rear end covers, and other components may have increased contact thermal resistance due to differences in materials and thickness, which will affect the heat dissipation of the motor.

[0004] To address this issue, the applicant adopted a segmented, irregularly shaped stator core, see [link / reference]. Figure 1 As shown, the irregular stator core block 1 is composed of a wound core portion 2, a first protrusion 3, a second protrusion 4, a front core portion 5, and a rear core portion 6. The first protrusion 3 and the second protrusion 4 protrude from both ends of the wound core portion 2, respectively. The front core portion 5 is located at the end of the first protrusion 3 away from the wound core portion 2, and the rear core portion 6 is located at the end of the second protrusion 4 away from the wound core portion 2. In this way, after the multiple irregular stator core blocks are pre-assembled and welded, the first protrusion 3 and the second protrusion 4 can be formed into a housing, the front core portion 5 into a front cover, the rear core portion 6 into a rear cover, and the wound core portion 2 into a winding structure. This makes the material and thickness of the overall structure the same, which can reduce the contact thermal resistance and improve the heat dissipation effect of the motor.

[0005] However, in traditional motors, after the stator core is wound, the segmented stator cores are usually assembled into a circle and welded together. Then, they are cold-pressed or hot-fitted into the housing to form the stator assembly. The rotor assembly is then pressed into the front and rear bearings, and after the rear end cover is installed, it is also installed into the stator assembly, thus completing the motor assembly. However, when using irregularly shaped stator core blocks, if they are pre-assembled into a complete circle, it is impossible to install the rotor assembly. Utility Model Content

[0006] This application aims to provide a pre-assembly device for welding irregular stator core blocks, which can splice irregular stator core blocks into stator cores and avoid the problem that the rotor assembly cannot be installed in the pre-assembly assembly of irregular stator core blocks.

[0007] This application provides a pre-assembly and rounding device for welding irregularly shaped stator core blocks, comprising:

[0008] A semi-circular splicing assembly includes a semi-circular welding fixture, wherein the semi-circular welding fixture is provided with a plurality of first positioning parts along the semi-circular direction, and the semi-circular welding fixture is also provided with a first weld seam through it; the first positioning parts are configured to insert and position irregular stator core blocks, and the welding parts of the irregular stator core blocks are exposed in the first weld seam; the first weld seam is configured to weld the welding parts of two adjacent irregular stator core blocks to form a pre-assembled semi-circular unit;

[0009] A pre-assembled semi-circular assembly includes a pre-assembled semi-circular welding fixture. The pre-assembled semi-circular welding fixture has at least two second positioning parts, which are arranged side by side at intervals along a circular direction. The pre-assembled semi-circular welding fixture also has a through-hole second weld. The second positioning parts are configured to be inserted into and positioned by the pre-assembled semi-circular unit, and the welding part of the pre-assembled semi-circular unit is exposed by the second weld. The second weld is configured to weld the welding parts of two adjacent pre-assembled semi-circular units to form a stator core.

[0010] In some embodiments, the semicircular welding fixture is a hollow semicircular positioning post with a semicircular inner wall. A plurality of first positioning parts are disposed on the semicircular inner wall of the semicircular positioning post, and the first weld is provided through the semicircular wall of the semicircular positioning post.

[0011] In some embodiments, the semicircular splicing assembly further includes a semicircular positioning fixture and a semicircular clamping ring. The semicircular positioning fixture is used to position multiple irregular stator core blocks side by side at intervals along the semicircular direction, and the semicircular clamping ring is used to clamp the multiple irregular stator core blocks positioned by the semicircular positioning fixture.

[0012] In some embodiments, the semicircular positioning fixture includes a semicircular component, the inner wall of which is used to position a plurality of irregularly shaped stator core blocks along the semicircular direction.

[0013] In some embodiments, the semicircular positioning fixture further includes a positioning seat, one end of the semicircular part is fixed to the positioning seat, and the positioning seat is used to limit the movement of a plurality of irregular stator core blocks positioned on the semicircular inner wall of the semicircular part along the axial direction of the semicircular part.

[0014] In some embodiments, the center of the semicircular part is provided with a limiting post along the axial direction of the semicircular part, and the limiting post is used to limit the front end protrusion and the rear end protrusion of the irregular stator core block positioned on the inner wall of the semicircular part.

[0015] In some embodiments, the semi-circular clamping ring includes a semi-circular clamping strip and a straight clamping strip. The semi-circular clamping strip is fitted to a non-circular stator core block positioned along the semi-circular direction. The straight clamping strip is tightly connected to the semi-circular clamping strip to clamp the plurality of non-circular stator core blocks positioned along the semi-circular direction.

[0016] In some embodiments, the circular assembly further includes a circular clamping fixture, which is used to clamp at least two pre-assembled semi-circular units into a cylindrical shape, and the at least two pre-assembled semi-circular units clamped by the circular clamping fixture are inserted into and positioned in the second positioning part.

[0017] In some embodiments, the circular clamping fixture includes at least two circular clamping members, which are connected end to end to fit and clamp at least two pre-assembled semi-circular units.

[0018] In some embodiments, the circular welding fixture includes a circular positioning sleeve, at least two second positioning portions are arranged around the axis of the circular positioning sleeve on the inner wall of the circular positioning sleeve, and the second weld is arranged through the side wall of the circular positioning sleeve.

[0019] According to the above embodiment of the pre-circular welding device for irregular stator core blocks, the semi-circular splicing assembly splices multiple irregular stator core blocks to form a pre-semi-circular unit. The circular splicing assembly then splices at least two pre-semi-circular units into the stator core, thus enabling the irregular stator core blocks to be assembled into the stator core. Furthermore, by housing the rotor assembly inside one of the pre-semi-circular units before forming the stator core using the circular splicing assembly, the problem of being unable to install the rotor assembly due to a stator core formed by at least two pre-semi-circular units can be avoided. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of an irregularly shaped stator core block;

[0021] Figure 2 A schematic diagram of the pre-circling process for the welding pre-circling device for irregular stator core blocks provided in this application;

[0022] Figure 3 A schematic diagram of the semi-circular positioning fixture and the semi-circular clamping ring in the pre-assembly device for welding irregular stator core blocks provided in this application;

[0023] Figure 4 A schematic diagram showing the cooperation between the semi-circular clamping ring and the semi-circular welding fixture in the pre-assembly device for welding irregular stator core blocks provided in this application;

[0024] Figure 5 A top view of the semi-circular welding fixture in the pre-assembly circular welding device for irregular stator core blocks provided in this application;

[0025] Figure 6 This is a schematic diagram of the pre-circular assembly component in the welding pre-circular assembly device for irregularly shaped stator core blocks provided in this application;

[0026] Figure 7A schematic diagram of the assembly welding fixture in another embodiment of the assembly assembly component of the irregular stator core block welding pre-assembly device provided in this application.

[0027] Figure label:

[0028] Semicircular splicing component 10, semicircular welding fixture 11, first positioning part 121, first weld 122, semicircular positioning post 13, semicircular positioning fixture 14, semicircular part 141, positioning seat 142, limiting post 143, semicircular clamping ring 15, semicircular clamping strip 151, straight clamping strip 152.

[0029] The components include: 20 for assembling a circle, 21 for welding a circle, 211 for positioning a second part, 212 for a second weld, 22 for tightening a circle, and 221 for assembling a circle clamp. Detailed Implementation

[0030] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. Similar elements in different embodiments are referred to by related similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present application are not shown or described in the specification. This is to avoid obscuring the core parts of the present application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0031] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments, and the operational steps involved in each embodiment can also be rearranged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for clearly describing a particular embodiment and do not imply that they represent the necessary components and / or order.

[0032] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0033] See Figures 2-7 As shown, the pre-circular welding device for irregularly shaped stator core blocks provided in this application includes a semi-circular splicing assembly 10 and a circular splicing assembly 20. The semi-circular splicing assembly 10 is used to pre-circle multiple irregularly shaped stator core blocks 1 (such as...) Figure 1As shown, the pre-assembled semicircular units are spliced ​​together to form a stator core. The splicing assembly 20 can splice two pre-assembled semicircular units together to form a stator core. The stator core has a cylindrical structure, and the arcs of the two pre-assembled semicircular units can be combined to form the stator core. In some embodiments, the cross-section of the pre-assembled semicircular unit can be considered a semicircle. In extreme cases, the arcs of the pre-assembled semicircular units can be a major arc and a minor arc, respectively. Of course, in this case, the semicircular splicing assembly 10 needs to be set with different shapes corresponding to the major and minor arcs.

[0034] See Figure 2 , Figure 4 and Figure 5 As shown, the semicircular splicing assembly 10 includes a semicircular welding fixture 11. The semicircular welding fixture 11 is provided with a plurality of first positioning parts 121 along the semicircular direction. The plurality of first positioning parts 121 are arranged side by side at equal intervals along the semicircular direction. The semicircular welding fixture 11 is also provided with a plurality of first welds 122 through it. Each first weld 122 is located between two adjacent first positioning parts 121 and the first weld 122 penetrates the thickness direction of the semicircular welding fixture 11.

[0035] In some embodiments, the semicircular welding fixture 11 can be considered as a columnar structure with a semicircular cross-section. A plurality of first positioning parts 121 are arranged along the semicircular direction on the inner wall of the semicircular welding fixture 11. The first weld 122 penetrates the wall of the semicircular welding fixture 11, and the first weld 122 is provided between two adjacent first positioning parts 121.

[0036] The first positioning part 121 is configured to insert and position a non-standard stator core block, and the welded portion of the non-standard stator core block is exposed through the first weld 122. In other words, during use, the non-standard stator core block is inserted into the first positioning part 121, and the non-standard stator core block is positioned by the first positioning part 121. The side portion of the non-standard stator core block in the width direction is the welded portion, which is exposed through the first weld 122. It can be understood that if the width of the non-standard stator core block is greater than the width of the first positioning part 121, the welded portion can be exposed through the first weld 122. The welded portions of the non-standard stator core blocks positioned on two adjacent first positioning parts 121 are all exposed through the first weld 122.

[0037] The first weld 122 is configured to weld the welding portions of two adjacent irregularly shaped stator core blocks to form a pre-assembled semi-circular unit. Specifically, the irregularly shaped stator core blocks are positioned at each first positioning part 121, and the welding portions of two adjacent irregularly shaped stator core blocks are welded together through the first weld 122 to form a pre-assembled semi-circular unit. In this embodiment, welding equipment can be used to weld the welding portions of two adjacent irregularly shaped stator core blocks from the first weld 122.

[0038] See Figure 2 and Figure 6As shown, the circular assembly 20 includes a circular welding fixture 21. The circular welding fixture 21 is provided with at least two second positioning parts 211. The at least two second positioning parts 211 are arranged side by side at intervals along the circumferential direction of the pre-assembled circle. The circular welding fixture 21 is also provided with a second weld 212 located between two adjacent second positioning parts 211. The second weld 212 penetrates the thickness direction of the circular welding fixture 21.

[0039] In some embodiments, the pre-assembled circular welding fixture 21 can be considered as a cylindrical structure with a full circle cross-section. At least two second positioning parts 211 are arranged on the inner wall of the pre-assembled circular welding fixture 21 along the circumferential direction of the pre-assembled circle. The second weld 212 penetrates the wall of the pre-assembled circular welding fixture 21, and a second weld 212 is provided between two adjacent second positioning parts 211.

[0040] In this embodiment, the circular welding fixture 21 is a hollow columnar structure. The cross-section of the pre-assembled semi-circular unit is semi-circular. Two pre-assembled semi-circular units can be assembled to form a complete circle. Thus, two second positioning parts 211 are formed in the circular welding fixture 21. The second positioning parts 211 are set on the cavity wall of the inner cavity of the circular welding fixture 21, and the second weld 212 penetrates the wall thickness of the circular welding fixture 21.

[0041] The second positioning part 211 is configured to insert and position a pre-assembled semi-circular unit, and the welded portion of the pre-assembled semi-circular unit is exposed in the second weld 212. Similarly, in use, the pre-assembled semi-circular unit is inserted into the second positioning part 211, and the pre-assembled semi-circular unit is positioned by the second positioning part 211. The side portion of the pre-assembled semi-circular unit in the width direction is its welded portion, which is exposed in the second weld 212. It is understood that if the width of the pre-assembled semi-circular unit is greater than the width of the second positioning part 212, its welded portion can be exposed in the second weld 212.

[0042] The second weld 212 is configured to weld the welding portions of two adjacent pre-assembled semicircular units to form a stator core. Similarly, pre-assembled semicircular units are positioned at each second positioning part 211, and the welding portions of two adjacent pre-assembled semicircular units are welded together by the second weld 212 to form a stator core. In this embodiment, welding equipment can also be used to weld the welding portions of two adjacent pre-assembled semicircular units from the second weld 212 to obtain the stator core.

[0043] It should be noted that placing the rotor assembly in one of the pre-assembled semicircular units before splicing and welding at least two pre-assembled semicircular units can avoid the problem of the stator core formed by at least two pre-assembled semicircular units being unable to install the rotor assembly.

[0044] See also Figure 2 , Figure 4 and Figure 5As shown, the semi-circular welding fixture 11 is a hollow semi-circular positioning post 13. The semi-circular positioning post 13 has a semi-circular inner wall; specifically, one side wall has a semi-circular cross-section, and the other side wall has a straight cross-section, forming a closed inner cavity with a hollow structure. Multiple first positioning parts 121 are disposed on the semi-circular inner wall of the semi-circular positioning post 13, and a first weld 122 is provided through the semi-circular wall of the semi-circular positioning post 13. The semi-circular inner wall is specifically structured to form multiple first positioning parts 121, facilitating the parallel and spaced arrangement of the multiple first positioning parts 121 along the semi-circular direction.

[0045] Before inserting multiple irregularly shaped stator core blocks into the first positioning part 121, it is usually necessary to pre-position the multiple irregularly shaped stator core blocks, see [reference]. Figure 2 and Figure 3 As shown, the semicircular splicing assembly 10 provided in this embodiment also includes a semicircular positioning fixture 14 and a semicircular clamping ring 15. The semicircular positioning fixture 14 is used to position multiple irregular stator core blocks side by side at intervals along the semicircular direction, and the semicircular clamping ring 15 is used to clamp the multiple irregular stator core blocks positioned by the semicircular positioning fixture 14.

[0046] Specifically, the semicircular positioning fixture 14 includes a semicircular part 141, the inner wall of which is used to position multiple irregularly shaped stator core blocks along the semicircular direction. For example... Figure 2 and Figure 3 As shown, the inner wall of the semicircular part 141 is a smooth wall. Multiple irregular stator core blocks are arranged at intervals along the inner wall of the semicircle. Specifically, the first protrusion and / or the second protrusion of the irregular stator core blocks are attached to the inner wall of the semicircle ...

[0047] See also Figure 2 and Figure 3 As shown, the semicircular part 141 is a hollow columnar structure. After the irregular stator core block is positioned on the semicircular inner wall of the semicircular part 141, in order to prevent the irregular stator core block from moving along its axial direction, the semicircular positioning fixture 14 provided in this embodiment also includes a positioning seat 142. One end of the semicircular part 141 is fixed to the positioning seat 142. The positioning seat 142 is used to limit the multiple irregular stator core blocks positioned on the semicircular inner wall of the semicircular part 141 along the axial direction of the semicircular part 141, so as to ensure that the ends of each irregular stator core block are aligned.

[0048] In this application, when at least two pre-assembled semi-circular units are spliced ​​and welded together to form a stator core, space should be reserved in the front and rear covers for the rotor assembly's shaft to pass through. Therefore, see [link to relevant documentation]. Figure 2 and Figure 3As shown, a limiting post 143 is provided at the center of the semicircular part 141 along the axial direction of the semicircular part 141. The limiting post 143 is used to limit the front end protrusion and the rear end protrusion of the irregular stator core block positioned on the inner wall of the semicircular part. The limiting space can be formed into the space through which the rotor assembly shaft passes after at least two pre-assembled semicircular units are spliced ​​together.

[0049] See Figure 2 and Figure 3 As shown, the semi-circular clamping ring 15 includes a semi-circular clamping strip 151 and a straight clamping strip 152. The semi-circular clamping strip 151 fits against the irregular stator core block positioned along the semi-circular direction, and the straight clamping strip 152 is tightly connected to the semi-circular clamping strip 151 to clamp the multiple irregular stator core blocks positioned along the semi-circular direction.

[0050] In this application, before inserting and positioning at least two pre-assembled semicircular units into the second positioning part 211, the at least two pre-assembled semicircular units need to be tightened to prevent them from shifting. See [link to application]. Figure 2 and Figure 6 As shown, the assembly 20 provided in this embodiment also includes an assembly clamping fixture 22, which is used to clamp at least two pre-assembled semi-circular units into a cylindrical shape. The at least two pre-assembled semi-circular units clamped by the assembly clamping fixture 22 are inserted into and positioned in the second positioning part 211.

[0051] In a specific embodiment, after tightening multiple irregular stator core blocks positioned along the semi-circular direction using the semi-circular clamping ring 15, the semi-circular positioning fixture 14 is removed. Then, the multiple irregular stator core blocks tightened by the semi-circular clamping ring 15 are inserted into the corresponding multiple first positioning parts 121 for positioning. The first positioning parts 121 are used for positioning, and the welding parts of two adjacent irregular stator core blocks are welded through the first weld seam 122. After welding is completed, the semi-circular welding fixture 11 and the semi-circular clamping ring 15 are removed, and at least two pre-assembled semi-circular units are spliced ​​into a circle. Then, the at least two pre-assembled semi-circular units that have been assembled into a circle are tightened using the circular clamping fixture 22. Afterward, the at least two pre-assembled semi-circular units tightened by the circular clamping fixture 22 are inserted into each of the second positioning parts 211 of the circular welding fixture 21. The welding parts of two adjacent pre-assembled semi-circular units are welded through the second weld seam 212, thus forming a stator core.

[0052] See also Figure 2 and Figure 6 As shown, the circular clamping fixture 22 includes at least two circular clamping members 221. The at least two circular clamping members 221 are connected end to end to fit and clamp at least two pre-assembled semi-circular units. The two adjacent circular clamping members 221 can be connected by bolts and nuts to lock the at least two pre-assembled semi-circular units within the space enclosed by the at least two circular clamping members 221.

[0053] In this embodiment, the circular welding fixture 21 includes a circular positioning sleeve 213, at least two second positioning parts 211 are arranged around the axis of the circular positioning sleeve 213 on the inner wall of the circular positioning sleeve 213, and a second weld 212 is arranged through the side wall of the circular positioning sleeve 213.

[0054] In this embodiment, see Figure 7 As shown, the circular welding fixture 21 can also be used for fixtures of ordinary shapes. Figure 7 The circular welding fixture 21 shown is equipped with multiple second positioning parts 211 to simultaneously position multiple ordinary-shaped stator core blocks. Here, one can select... Figure 7 The welding fixture 21 shown is used to weld the pre-assembled semi-circular units. It is only necessary to ensure that the welded parts of two adjacent pre-assembled semi-circular units are exposed on the same second weld seam 212.

[0055] In summary, the pre-assembly circular welding device for irregularly shaped stator core blocks provided by this utility model uses a semi-circular splicing component to splice multiple irregularly shaped stator core blocks into pre-assembled semi-circular units, and a circular assembly component to splice at least two pre-assembled semi-circular units into a stator core. Thus, after the irregularly shaped stator core blocks are pre-assembled into pre-assembled semi-circular units using the semi-circular splicing component, the circular assembly component splices these pre-assembled semi-circular units into a stator core. Furthermore, by housing the rotor assembly inside one of the pre-assembled arc-shaped units before forming the stator core using the circular assembly component, the problem of being unable to install the rotor assembly due to a stator core formed from at least two pre-assembled semi-circular units can be avoided.

[0056] The above-described specific examples are for illustrative purposes only and are not intended to limit the scope of this invention. Those skilled in the art to which this invention pertains can make various simple deductions, modifications, or substitutions based on the concept of this invention.

Claims

1. A special-shaped stator core block welding pre-rounding device, characterized in that, include: A semi-circular splicing assembly includes a semi-circular welding fixture, wherein the semi-circular welding fixture is provided with a plurality of first positioning parts along the semi-circular direction, and the semi-circular welding fixture is also provided with a first weld seam through it; the first positioning parts are configured to insert and position irregular stator core blocks, and the welding parts of the irregular stator core blocks are exposed in the first weld seam; the first weld seam is configured to weld the welding parts of two adjacent irregular stator core blocks to form a pre-assembled semi-circular unit; A pre-assembled semi-circular assembly includes a pre-assembled semi-circular welding fixture. The pre-assembled semi-circular welding fixture has at least two second positioning parts, which are arranged side by side at intervals along a circular direction. The pre-assembled semi-circular welding fixture also has a through-hole second weld. The second positioning parts are configured to be inserted into and positioned by the pre-assembled semi-circular unit, and the welding part of the pre-assembled semi-circular unit is exposed by the second weld. The second weld is configured to weld the welding parts of two adjacent pre-assembled semi-circular units to form a stator core.

2. The special-shaped stator core block welding pre-rounding device according to claim 1, characterized in that, The semi-circular welding fixture is a hollow semi-circular positioning post with a semi-circular inner wall. A plurality of first positioning parts are disposed on the semi-circular inner wall of the semi-circular positioning post, and the first weld is provided through the semi-circular wall of the semi-circular positioning post.

3. The special-shaped stator core block welding pre-rounding device according to claim 1, characterized in that, The semicircular splicing assembly also includes a semicircular positioning fixture and a semicircular clamping ring. The semicircular positioning fixture is used to position multiple irregular stator core blocks side by side at intervals along the semicircular direction. The semicircular clamping ring is used to clamp the multiple irregular stator core blocks positioned by the semicircular positioning fixture.

4. The special-shaped stator core block welding pre-rounding device according to claim 3, characterized in that, The semi-circular positioning fixture includes a semi-circular component, the inner wall of which is used to position multiple irregularly shaped stator core blocks along the semi-circular direction.

5. The special-shaped stator core block welding pre-rounding device according to claim 4, characterized in that, The semicircular positioning fixture also includes a positioning seat, one end of the semicircular part is fixed to the positioning seat, and the positioning seat is used to limit the movement of multiple irregular stator core blocks positioned on the inner wall of the semicircle of the semicircle along the axial direction of the semicircular part.

6. The special-shaped stator core block welding pre-rounding device according to claim 5, characterized in that, The center of the semicircular part is provided with a limiting post along the axial direction of the semicircular part. The limiting post is used to limit the front end protrusion and the rear end protrusion of the irregular stator core block positioned on the inner wall of the semicircular part.

7. The special-shaped stator core block welding pre-rounding device according to claim 3, characterized in that, The semi-circular clamping ring includes a semi-circular clamping strip and a straight clamping strip. The semi-circular clamping strip fits against the irregular stator core block positioned along the semi-circular direction. The straight clamping strip is tightly connected to the semi-circular clamping strip to clamp the multiple irregular stator core blocks positioned along the semi-circular direction.

8. The special-shaped stator core block welding pre-rounding device according to claim 1, characterized in that, The assembly also includes an assembly clamping fixture, which is used to clamp at least two pre-assembled semi-circular units into a cylindrical shape. The at least two pre-assembled semi-circular units clamped by the assembly clamping fixture are inserted into and positioned in the second positioning part.

9. The special-shaped stator core block welding pre-rounding device according to claim 8, characterized in that, The circular clamping fixture includes at least two circular clamping components, which are connected end to end to fit and clamp at least two pre-assembled semi-circular units.

10. The pre-assembly and rounding device for welding irregularly shaped stator core blocks as described in claim 1, characterized in that, The circular welding fixture includes a circular positioning sleeve, at least two second positioning parts are arranged around the axis of the circular positioning sleeve on the inner wall of the circular positioning sleeve, and the second weld is arranged through the side wall of the circular positioning sleeve.

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