An automatic motor stator welding apparatus and method

Abstract

The present application relates to motor accessory welding technical field, specifically is a kind of motor stator automatic welding equipment and method, including welding mechanism, welding mechanism includes the rotating table for rotating switching feeding, two symmetrical arrangement alignment mechanism are provided on rotating table, alignment mechanism is used to carry out piece by piece coaxial alignment adjustment to silicon steel sheet, the initial lifting of the silicon steel sheet group is carried out using lifting ring in the application, and temporary clamping limit is provided by the abutting roller arranged outside the silicon steel sheet group, when aligning, by rotating the abutting roller, its side lets go of groove gradually towards silicon steel sheet, so that silicon steel sheet is sequentially dropped from bottom to top, while using drive assembly to sequentially push each group of abutting block to the inside of the silicon steel sheet after piece by piece falling to carry out inside support constraint, complete piece by piece coaxial alignment adjustment of silicon steel sheet, effectively eliminate the layer misregistration caused by assembly gap, so as to ensure that the weld position is accurate when subsequent welding.

Description

Technical Field

[0001] This invention relates to the field of welding technology for motor components, specifically an automatic welding device and method for motor stators. Background Technology

[0002] The stator is the core component of an electric motor. It is usually composed of a stator core and windings. The stator core is made up of several silicon steel sheets stacked layer by layer. During the manufacturing process, in order to secure these stacked silicon steel sheets into a whole and ensure its structural rigidity, the stacked silicon steel sheets need to be welded. The welding quality directly affects the structural strength and dimensional accuracy of the stator core, and thus affects the electromagnetic performance and operational reliability of the motor.

[0003] In the existing technology, the welding of stator cores often adopts a dual-station welding equipment. This equipment generally consists of a circumferentially rotatable dual-station table, a clamping structure, and a welding structure. During operation, the operator places the silicon steel sheet assembly to be welded on the station of the dual-station table, rotates the dual-station table to move the silicon steel sheet assembly to the welding position, and then clamps the silicon steel sheet assembly by the clamping structure. At the same time, the welding structure performs axial welding on multiple preset welding positions on the silicon steel sheet assembly.

[0004] However, during the process of placing the silicon steel sheet assembly at the workstation, an assembly gap must be left between the workstation and the silicon steel sheet assembly to ensure that the assembly can be smoothly inserted. This results in the workstation not being able to fit tightly with the silicon steel sheet. During placement, due to the influence of this gap, the stacked silicon steel sheets are prone to interlayer misalignment, which in turn forms an irregular step-like structure on the outer circumference of the silicon steel sheet assembly. This step-like structure will cause the weld position to deviate and the penetration depth to be uneven during subsequent welding, which will seriously reduce the welding quality and make it impossible to reliably guarantee the dimensional accuracy and structural strength of the stator core.

[0005] The existing dual-station welding equipment does not have a mechanism to adjust the coaxial alignment of silicon steel sheets one by one, making it difficult to actively eliminate interlayer misalignment before feeding and welding, which has become a key problem restricting the improvement of welding quality. Summary of the Invention

[0006] In view of the above problems, embodiments of the present invention provide an automatic welding device and method for motor stators to solve the aforementioned technical problems.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: The first aspect of the present invention provides an automatic welding equipment for motor stators, including a welding mechanism. The welding mechanism includes a rotating table for rotating and switching the feeding, and two symmetrically arranged alignment mechanisms are provided on the rotating table. The alignment mechanisms are used to perform coaxial alignment adjustment of silicon steel sheets one by one.

[0008] The alignment mechanism includes a protruding column fixedly installed on the upper side of the rotating platform, and a lifting ring slidably connected to the rotating platform, with the lifting ring and the protruding column arranged coaxially.

[0009] The alignment mechanism includes several groups of abutment blocks arranged at equal intervals along the circumference of the protruding column. Each group consists of several abutment blocks arranged circumferentially. The abutment blocks are staggered and used to synchronously push the inner surface of the silicon steel sheet. A drive assembly is provided on the rotating table to push each group of abutment blocks in sequence.

[0010] The alignment mechanism also includes abutting rollers mounted on a rotating platform via several connecting components. The abutting rollers are arranged circumferentially along the protrusions, and a clearance groove is provided on the side of the abutting rollers. By rotating the abutting rollers, the clearance grooves of the abutting rollers gradually face the silicon steel sheets, thereby causing the silicon steel sheets to fall one by one from bottom to top.

[0011] Preferably, a plurality of limiting square rods are arranged at equal intervals along the circumference of the upper side of the lifting ring. The limiting square rods correspond to the buckles on the silicon steel sheet. The limiting square rods are slidably connected to the lifting ring along the radial direction and locked by screws.

[0012] Preferably, a plurality of hydraulic cylinders are fixedly installed on the lower side of the rotating platform, and the telescopic section of the hydraulic cylinders is fixedly connected to the lifting ring.

[0013] Preferably, the drive assembly includes a second hydraulic cylinder fixedly installed on the lower side of the turntable, and a push plate is detachably connected to the telescopic section of the second hydraulic cylinder.

[0014] Preferably, the upper and lower edges of the push plate are chamfered, and the inner sides of each set of abutment blocks are provided with grooves from bottom to top. A helical spring is provided between the abutment block and the rotating table.

[0015] Preferably, as the pushing disc moves from bottom to top, it pushes the abutment blocks outward in groups. When the pushing disc moves to the groove position, the helical spring pushes the corresponding abutment block inward.

[0016] Preferably, the connecting assembly includes a roller frame that is radially slidably connected to the rotating table along the protrusion, the roller frame being rotatably connected to the abutment roller, and the roller frame being locked to the rotating table by bolts.

[0017] Preferably, a geared motor is fixedly installed on the lower side of the roller frame, and the output shaft of the geared motor is fixedly connected to the abutment roller.

[0018] Preferably, the relief groove on the side of the abutment roller has a wedge-shaped structure.

[0019] The second aspect of the present invention provides an automatic welding method for motor stators. The specific welding method steps are as follows: S1, a group of silicon steel sheets to be welded are coaxially sleeved on a front protrusion and supported by a lifting ring. Then, the rotating table is rotated to drive the silicon steel sheets to be welded to rotate backward to the welding station.

[0020] S2. During the rotation of the rotating table, the rotating abutment roller gradually moves the clearance groove on its side toward the silicon steel sheet. The clearance groove causes the bottom layer of silicon steel sheet to lose radial constraint and fall one by one, realizing the silicon steel sheet falling and stacking one by one from bottom to top.

[0021] S3. During the falling process of the silicon steel sheet, the drive component pushes each set of abutment blocks in sequence, so that each set of abutment blocks pushes against the inner side of the silicon steel sheet from the inside to the outside in a synchronous manner, thereby completing the coaxial alignment of the silicon steel sheets one by one.

[0022] S4. By rotating the turntable, the stacked and aligned silicon steel sheets are switched to the welding station, where the welding mechanism performs welding. At the same time, another set of silicon steel sheets to be welded is fed.

[0023] The beneficial effects of this invention are as follows: First, this invention uses a lifting ring to initially lift the silicon steel sheet assembly, and provides temporary clamping and limiting by abutment rollers arranged on the outside of the silicon steel sheet assembly. During alignment, the abutment rollers are rotated so that their side clearance grooves gradually face the silicon steel sheets, thereby realizing the silicon steel sheets falling one by one from bottom to top. At the same time, the drive assembly sequentially pushes each set of abutment blocks to internally support and constrain the inner side of the silicon steel sheets after they fall, completing the coaxial alignment adjustment of each silicon steel sheet. This effectively eliminates interlayer misalignment caused by assembly gaps, significantly improves the coaxial alignment accuracy of the silicon steel sheets, thereby ensuring accurate weld position and uniform penetration depth during subsequent welding, and improving welding quality.

[0024] Second, this invention uses a hydraulic cylinder to drive the push plate to move up and down reciprocally. The push plate pushes each set of abutment blocks outward from bottom to top, so that each set of abutment blocks can provide internal support adjustment for the inner side of the silicon steel sheet in all directions. Combined with the reset action of the spiral spring, when the push plate moves to the groove position of the abutment block, the corresponding abutment block automatically retracts inward. The inner side of the silicon steel sheet is precisely centered in a progressive and step-by-step manner, which further improves the coaxial alignment accuracy of the silicon steel sheet.

[0025] Third, the present invention uses a connecting component to arrange the abutment roller on the outside of the silicon steel sheet, and makes the abutment roller temporarily press against the outer edge of the silicon steel sheet. The abutment roller is driven to rotate by a reduction motor, so that the wedge-shaped relief groove on its side gradually faces the silicon steel sheet. The lower part of the relief groove first corresponds to the bottom layer of silicon steel sheet, so that the silicon steel sheet of this layer loses the radial constraint of the abutment roller and falls down first, while the upper layer of silicon steel sheet is still pressed by the cylindrical surface of the abutment roller. This reliably realizes the sequential falling of silicon steel sheets from bottom to top, providing a stable prerequisite for the internal support alignment of each sheet. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the structure of the rotating table, protruding column, abutting roller and limiting square rod in this invention;

[0029] Figure 3 This is a schematic diagram of the structure of the rotary table, the reduction motor, the hydraulic cylinder II, and the protruding column in this invention;

[0030] Figure 4 This is a schematic diagram of the structure when the abutting roller abuts against the silicon steel sheet assembly in this invention;

[0031] Figure 5 This is a schematic diagram of the structure of the abutment roller in this invention;

[0032] Figure 6 This is a partial cross-sectional view of the rotating table, the abutting roller, the roller frame, and the reduction motor in this invention;

[0033] Figure 7 This is a partial sectional view of the rotating platform, lifting ring, limiting square rod and hydraulic cylinder 1 in this invention;

[0034] Figure 8 This is a partial cross-sectional view of the rotating platform, protruding column, abutment block, and hydraulic cylinder 2 in this invention;

[0035] Figure 9 This is a partial cross-sectional view of the push disk and the first set of abutting blocks in this invention;

[0036] Figure 10 This is a partial cross-sectional view of the pusher disc and the second set of abutment blocks in this invention;

[0037] Figure 11 This is a partial cross-sectional view of the pusher disc and the third set of abutment blocks in this invention.

[0038] In the diagram: 1. Welding mechanism; 2. Alignment mechanism; 11. Rotating table; 21. Protruding column; 22. Lifting ring; 23. Abutting block; 24. Drive assembly; 25. Connecting assembly; 26. Abutting roller; 221. Limiting square rod; 222. Hydraulic cylinder one; 241. Hydraulic cylinder two; 242. Push plate; 251. Roller frame; 252. Gear motor. Detailed Implementation

[0039] The embodiments of the present invention are described in detail below. The embodiments described below are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. Where specific techniques or conditions are not specified in the embodiments, they shall be performed in accordance with the techniques or conditions described in the literature in the art or in accordance with the product manual.

[0040] See Figure 1 , Figure 2 and Figure 3 An automatic welding device for motor stator includes a welding mechanism 1. The welding mechanism 1 includes a rotating table 11 for rotating and switching the feeding. Two symmetrically arranged alignment mechanisms 2 are provided on the rotating table 11. The alignment mechanisms 2 are used to adjust the coaxial alignment of silicon steel sheets one by one.

[0041] During welding, the operator places the silicon steel sheet assembly to be welded into one of the alignment mechanisms 2, and then rotates the rotating table 11 half a turn, so that the alignment mechanism 2 with the silicon steel sheet assembly moves to the welding position of the welding mechanism 1. During the rotation of the rotating table 11, the silicon steel sheet is aligned and adjusted piece by piece by piece through the alignment mechanism 2, which effectively eliminates the interlayer misalignment caused by the assembly gap, significantly improves the coaxial alignment accuracy of the silicon steel sheet, thereby ensuring accurate weld position and uniform penetration depth during subsequent welding, and improving the welding quality.

[0042] Subsequently, the silicon steel sheet group that is in the corresponding position and coaxially adjusted is welded by the welding mechanism 1. During the welding process, the operator puts the new silicon steel sheet group to be welded into another alignment mechanism 2, thereby realizing the continuous welding processing of the silicon steel sheet group.

[0043] In this embodiment, the welding mechanism 1 adopts existing welding equipment. The welding equipment also includes a clamping structure and a welding structure. During welding, the clamping structure clamps the silicon steel sheet group on its lower side, and the welding structure simultaneously performs axial welding on multiple preset welding positions on the silicon steel sheet group.

[0044] To facilitate the placement of the silicon steel sheet assembly on the rotating table 11, the present invention designs the following structure: (See reference) Figure 1 , Figure 2 , Figure 3 and Figure 8 The alignment mechanism 2 includes a protruding post 21 fixedly installed on the upper side of the rotating table 11, and a lifting ring 22 slidably connected to the rotating table 11. The lifting ring 22 is arranged coaxially with the protruding post 21.

[0045] When welding is required, the operator places the silicon steel sheet assembly to be welded on the outside of the protruding post 21 at the front of the rotating table 11, and places the silicon steel sheet assembly on the lifting ring 22. In the initial state, the lifting ring 22 lifts the silicon steel sheet assembly to a certain height, leaving space for the lifting ring 22 to descend, so that the silicon steel sheet assembly can fall piece by piece under the action of gravity.

[0046] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The alignment mechanism 2 includes abutting rollers 26 mounted on a rotating table 11 via several connecting components 25. The abutting rollers 26 are arranged circumferentially along the protrusions 21, and a clearance groove is provided on the side of the abutting rollers 26.

[0047] The position of the connecting component 25 is manually adjusted in advance according to the outer diameter of the silicon steel sheet group, so that the abutting roller 26 rotates so that its cylindrical surface faces the silicon steel sheet group, thereby making the abutting roller 26 press against the silicon steel sheet group, thus temporarily constraining the silicon steel sheet group. Then, the lifting ring 22 is moved down so that the bottom of the silicon steel sheet group is suspended. Then, as the rotating table 11 drives the silicon steel sheet group to rotate towards the welding structure, the abutting roller 26 rotates so that the clearance groove of the abutting roller 26 gradually faces the silicon steel sheet, thereby causing the silicon steel sheet to fall one by one from bottom to top.

[0048] It should be noted that when welding silicon steel sheet groups with the same outer diameter, only one adjustment of the connecting component 25 is needed to allow the abutment roller 26 to temporarily constrain the silicon steel sheet group for a long period of time, thereby without reducing the welding efficiency.

[0049] See Figure 1 , Figure 2 , Figure 8 , Figure 9 , Figure 10 and Figure 11 The alignment mechanism 2 also includes several sets of abutment blocks 23 arranged at equal intervals along the circumference of the protruding column 21. Each set consists of several abutment blocks 23 arranged in the circumference. The abutment blocks 23 are arranged in an alternating manner. The abutment blocks 23 are used to synchronously push the inner side of the silicon steel sheet. The rotating table 11 is provided with a drive assembly 24 that pushes each set of abutment blocks 23 in sequence.

[0050] As the silicon steel sheets fall one by one, the drive assembly 24 pushes each set of abutment blocks 23 outward in turn, so that each set of abutment blocks 23 can adjust the inner side of the silicon steel sheet in all directions, thereby accurately centering the inner side of the silicon steel sheet in a progressive and step-by-step manner, further improving the coaxial alignment accuracy of the silicon steel sheet.

[0051] It is worth noting that when the rotating table 11 drives the silicon steel sheet assembly to rotate completely to the position of the welding structure, the drive assembly 24 can simultaneously push out all the abutment blocks 23, so that all the abutment blocks 23 simultaneously abut against the inner side of the silicon steel sheet and are coaxially aligned, thereby effectively ensuring the coaxial position of each silicon steel sheet and thus ensuring the quality of welding.

[0052] To prevent the silicon steel sheets from deflecting during their descent, the present invention designs the following structure: (See attached diagram) Figure 2 , Figure 3 and Figure 7 Several limiting rods 221 are arranged at equal intervals along the circumference of the upper side of the lifting ring 22. When the operator places the silicon steel sheet assembly on the upper side of the lifting ring 22, the limiting rods 221 correspond to the buckles on the silicon steel sheet, thereby constraining and limiting the silicon steel sheet, so that the silicon steel sheet can fall vertically and prevent the silicon steel sheet from rotating.

[0053] Furthermore, the limiting rod 221 is slidably connected to the lifting ring 22 radially and locked by screws. Therefore, the position of the limiting rod 221 can be slidably adjusted when corresponding to silicon steel sheets of different diameters, and only needs to be adjusted once. By unscrewing the screws, the limiting rod 221 can be replaced to adapt to silicon steel sheet slots of different widths. In this invention, the width of the limiting rod 221 matches that of the silicon steel sheet slot, which can enable the silicon steel sheet to fall smoothly while preventing the silicon steel sheet from deflecting.

[0054] To facilitate the vertical movement of the lifting ring 22 and allow the silicon steel sheets to fall one by one, the present invention designs the following structure: (See reference) Figure 3 and Figure 7 Several hydraulic cylinders 222 are fixedly installed on the lower side of the rotating platform 11. The telescopic section of the hydraulic cylinder 222 is fixedly connected to the lifting ring 22. When the silicon steel sheet is fitted on the outside of the protrusion 21, the hydraulic cylinder 222 pushes the lifting ring 22 upward to pre-raise it by 10mm. When the silicon steel sheet needs to fall one by one, the hydraulic cylinder 222 drives the lifting ring 22 to return downward, so that there is a gap on the lower side of the silicon steel sheet, which facilitates the falling of the silicon steel sheet.

[0055] To facilitate the synchronous outward movement of each set of abutment blocks 23 in sequence, the present invention is designed with the following structure: (See attached diagram) Figure 1 , Figure 8 , Figure 9 , Figure 10 and Figure 11 The drive assembly 24 includes a hydraulic cylinder 241 fixedly installed on the lower side of the rotating table 11. A push plate 242 is detachably connected to the telescopic section of the hydraulic cylinder 241. The upper and lower edges of the push plate 242 are chamfered. The inner side of each set of abutment blocks 23 is provided with grooves from bottom to top. A helical spring is provided between the abutment block 23 and the rotating table 11. During the process of the push plate 242 moving from bottom to top, it pushes the abutment blocks 23 outwards one by one. When the push plate 242 moves to the groove position, the helical spring pushes the corresponding abutment block 23 to move inwards.

[0056] As the silicon steel sheets fall one by one, the telescopic section of the extended hydraulic cylinder 241 drives the push plate 242 to move upward, so that the push plate 242 contacts each set of abutment blocks 23 in sequence. This causes the push plate 242 to push the abutment blocks 23 outward in sequence, thereby enabling each set of abutment blocks 23 to provide internal support adjustment for the inner side of the silicon steel sheet in all directions. When the push plate 242 moves to the groove position of the abutment block 23, the helical spring pushes the corresponding abutment block 23 inward to reset through its elastic force. This achieves precise centering of the inner side of the silicon steel sheet in a progressive and step-by-step manner, further improving the coaxial alignment accuracy of the silicon steel sheet.

[0057] To facilitate the contact roller 26 in contacting silicon steel sheets of various diameters, the present invention designs the following structure: (See reference) Figure 1 , Figure 3 and Figure 6 The connecting assembly 25 includes a roller frame 251 that is radially slidably connected to the rotating table 11 along the protrusion 21. The roller frame 251 is rotatably connected to the abutment roller 26. The roller frame 251 is locked to the rotating table 11 by bolts. By manually moving the roller frame 251, the roller frame 251 drives the abutment roller 26 to abut against the outside of the silicon steel sheet. Then, the roller frame 251 is locked to the rotating table 11 by bolts.

[0058] It should be noted that when welding silicon steel sheet groups with the same outer diameter, only one adjustment of the roller frame 251 is needed to ensure that the abutment roller 26 provides temporary constraint on the silicon steel sheet group for a long period of time, thereby without reducing the welding efficiency.

[0059] To facilitate the shifting roller 26 and allow the silicon steel sheets to fall one by one from bottom to top, the present invention is designed with the following structure: (See reference) Figure 5 and Figure 6 A reduction motor 252 is fixedly installed on the lower side of the roller frame 251. The output shaft of the reduction motor 252 is fixedly connected to the abutment roller 26. The clearance groove on the side of the abutment roller 26 has a wedge-shaped structure.

[0060] When it is necessary to perform coaxial alignment adjustment of silicon steel sheets, the geared motor 252 is started to drive the abutment roller 26 to rotate. When the cylindrical surface of the abutment roller 26 abuts against the silicon steel sheet, the abutment roller 26 provides temporary radial constraint on the silicon steel sheet. When the wedge-shaped relief groove of the abutment roller 26 gradually rotates to face the silicon steel sheet, the lower part of the relief groove first corresponds to the bottom silicon steel sheet, so that the silicon steel sheet of this layer loses the radial constraint of the abutment roller 26 and falls down first, while the upper silicon steel sheet is still held in place by the cylindrical surface of the abutment roller 26. This reliably realizes the sequential falling of silicon steel sheets from bottom to top, providing a stable prerequisite for the alignment of the inner supports of each sheet.

[0061] It should be noted that a rubber layer is provided on the outer side of the abutting roller 26 in this embodiment. This rubber layer can improve the friction of the roller against the silicon steel sheet, thereby increasing the radial constraint of the roller 26. On the other hand, it can prevent the roller 26 from scratching the silicon steel sheet.

[0062] Furthermore, the specific welding method steps of the present invention are as follows: S1, a group of silicon steel sheets to be welded are coaxially sleeved on a front protrusion 21 and supported by a lifting ring 22, and then the rotating table 11 is rotated to drive the silicon steel sheets to be welded to rotate backward to the welding station.

[0063] S2. During the rotation of the rotating table 11, the lifting ring 22 moves down and then the abutment roller 26 rotates, so that the clearance groove on its side gradually faces the silicon steel sheet. The clearance groove causes the bottom layer of silicon steel sheet to lose radial constraint and fall down one by one, realizing the silicon steel sheet falling and stacking one by one from bottom to top.

[0064] S3. During the falling of the silicon steel sheet, the pusher 242 pushes each set of abutment blocks 23 in sequence, so that each set of abutment blocks 23 pushes against the inner side of the silicon steel sheet from the inside to the outside, thus completing the coaxial alignment of the silicon steel sheets one by one.

[0065] S4. By rotating the rotary table 11, the stacked and aligned silicon steel sheets are switched to the welding station and welded by the welding mechanism 1. At the same time as welding, another set of silicon steel sheets to be welded is fed.

[0066] Although this invention adds structures such as the abutment roller 26, abutment block 23, and protruding column 21 to the traditional welding equipment, which increases the initial investment cost to some extent, the above structure enables precise centering of the inner side of the silicon steel sheet by each abutment block 23 while the silicon steel sheet is dropped piece by piece. In conjunction with the temporary constraint and piece-by-piece release of the outer side of the silicon steel sheet by the abutment roller 26, it effectively solves the interlayer misalignment caused by assembly gaps, effectively ensures the coaxial alignment accuracy of each layer of silicon steel sheet, thereby ensuring accurate weld position and uniform penetration depth during subsequent welding, greatly improving welding quality, reducing scrap rate and rework costs caused by misalignment, and quickly achieving quality benefits. It has high practical value.

[0067] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0068] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0069] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0070] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An automatic welding device for motor stators, comprising a welding mechanism, the welding mechanism including a rotary table for rotating and switching material feeding, characterized in that, Two symmetrically arranged alignment mechanisms are provided on the rotating table. The alignment mechanisms are used to adjust the silicon steel sheets coaxially one by one. The alignment mechanism includes a protruding column fixedly installed on the upper side of the rotating platform, and a lifting ring slidably connected to the rotating platform, with the lifting ring and the protruding column arranged coaxially. The alignment mechanism includes several groups of abutting blocks arranged at equal intervals along the circumference of the protruding column. Each group of abutting blocks consists of several abutting blocks arranged in the circumference. The abutting blocks are staggered and used to synchronously push the inner side of the silicon steel sheet. A drive assembly is provided on the rotating table to push each group of abutting blocks in sequence. The alignment mechanism also includes abutting rollers mounted on a rotating table via several connecting components. The abutting rollers are arranged circumferentially along the protrusions, and a clearance groove is provided on the side of the abutting rollers. By rotating the abutting rollers, the clearance grooves of the abutting rollers gradually face the silicon steel sheets, thereby causing the silicon steel sheets to fall one by one from bottom to top. The drive assembly includes a hydraulic cylinder two fixedly installed on the lower side of the rotating platform, and a push plate is detachably connected to the telescopic section of the hydraulic cylinder two. The upper and lower edges of the push plate are chamfered, and the inner sides of each set of abutment blocks are provided with grooves from bottom to top. A helical spring is provided between the abutment block and the rotating table. As the pusher plate moves from bottom to top, it pushes the abutment blocks outward in groups. When the pusher plate moves to the groove position, the helical spring pushes the corresponding abutment block inward.

2. The automatic welding equipment for motor stators according to claim 1, characterized in that, The upper side of the lifting ring is provided with several limiting square rods at equal intervals along its circumference. The limiting square rods correspond to the buckles on the silicon steel sheet. The limiting square rods are slidably connected to the lifting ring along its radial direction and are locked by screws.

3. The automatic welding equipment for motor stators according to claim 1, characterized in that, Several hydraulic cylinders are fixedly installed on the underside of the rotating platform, and the telescopic section of the hydraulic cylinder is fixedly connected to the lifting ring.

4. The automatic welding equipment for motor stators according to claim 1, characterized in that, The connecting assembly includes a roller frame that is slidably connected to the rotating table along the radial direction of the protrusion, the roller frame being rotatably connected to the abutment roller, and the roller frame being locked to the rotating table by bolts.

5. The automatic welding equipment for motor stators according to claim 4, characterized in that, A geared motor is fixedly installed on the lower side of the roller frame, and the output shaft of the geared motor is fixedly connected to the abutment roller.

6. The automatic welding equipment for motor stators according to claim 1, characterized in that, The clearance groove on the side of the abutment roller has a wedge-shaped structure.

7. An automatic welding method for motor stators, using the automatic welding equipment for motor stators according to any one of claims 1 to 6, characterized in that, The specific welding method steps are as follows: S1. A set of silicon steel sheets to be welded are coaxially mounted on a front protrusion and supported by a lifting ring. Then, the rotating table is rotated to drive the silicon steel sheets to be welded to rotate backward to the welding station. S2. During the rotation of the rotating table, the rotating abutment roller gradually moves the clearance groove on its side toward the silicon steel sheet. The clearance groove causes the bottom silicon steel sheet to lose radial constraint and fall one by one, realizing the silicon steel sheets falling and stacking one by one from bottom to top. S3. During the falling process of the silicon steel sheet, the drive component pushes each set of abutment blocks in sequence, so that each set of abutment blocks pushes against the inner side of the silicon steel sheet from the inside to the outside in a synchronous manner, thereby completing the coaxial alignment of the silicon steel sheets one by one. S4. By rotating the turntable, the stacked and aligned silicon steel sheets are switched to the welding station, where the welding mechanism performs welding. At the same time, another set of silicon steel sheets to be welded is fed.

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