Transformer iron core positioning and assembling device

Abstract

The invention relates to a transformer iron core positioning and assembling device, and belongs to the technical field of transformers, the transformer iron core positioning and assembling device comprises a base which is detachably fixed with a stacking beam through a clamping mechanism, and the stacking beam is a direct fixing platform; the lifting seat is movably connected to the lower part of the base through a lifting assembly and is adaptive to different stacking beam thicknesses and lamination heights; the rotary adjusting structure is arranged between the base and the lifting seat and adapts to the placing working condition of the variable-width iron core in the length direction or the vertical length direction of the stacking beam; the two groups of symmetrical driving assemblies are mounted on the lifting seat; the V-shaped positioning piece is connected with the output end of the driving assembly, and the inner wall of the V-shaped positioning piece is in a step shape matched with the standard step contour of the variable-width iron core; the driving assembly drives the two V-shaped positioning pieces to be close to or far away from each other periodically, silicon steel sheets in the lamination process are subjected to active shaping correction, and the overall contour of the step area is restrained. According to the invention, automatic positioning and shaping can be carried out on the silicon steel sheet in the variable-width iron core lamination process.

Description

Technical Field

[0001] This invention belongs to the field of transformer technology, and in particular relates to a transformer core positioning and assembly device. Background Technology

[0002] Variable-width cores are core structures with differentiated widths along the height direction. By placing core pieces of corresponding widths at different height positions, the cross-section of the core is distributed in a stepped pattern. This structure can improve magnetic flux distribution, optimize magnetic circuit structure, increase magnetic flux utilization, and reduce core losses, thereby improving transformer operating efficiency. Therefore, it is widely used in the field of power transmission and distribution transformers.

[0003] In existing technologies, the stacking of variable-width iron chips mostly employs manual operation. Because different heights of the variable-width iron core correspond to different chip widths, and the iron core exhibits a stepped structure in the height direction, repeated alignment and adjustment of the edges of each layer of iron chips are necessary in areas where the chip width varies.

[0004] This manual stacking method relies entirely on the operator's experience for position correction. Not only are the operation steps cumbersome and labor-intensive, but problems such as skewed or misaligned iron cores and uneven step edges are also very likely to occur during the stacking process. This results in insufficient stacking accuracy and low stacking efficiency, while making it difficult to ensure the consistency and stability of the iron core structure. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a transformer core positioning and assembly device that can automatically position and shape silicon steel sheets during the lamination process of widened cores.

[0006] A transformer core positioning and assembly device, comprising:

[0007] The base is detachably fixed to the stacking beam via a clamping mechanism, and the stacking beam is a direct fixing platform;

[0008] The lifting seat is movably connected to the base via a lifting assembly, adapting to different stacking beam thicknesses and stacking plate heights;

[0009] The rotating adjustment structure is located between the base and the lifting seat, which is suitable for the placement of the widened iron core along the length of the stacked beam or the vertical length direction.

[0010] Two sets of symmetrical drive components are installed on the lifting platform;

[0011] The V-shaped positioning component is connected to the output end of the drive assembly. The inner wall of the V-shaped positioning component is stepped, matching the standard stepped profile of the widened iron core. The drive assembly drives the two sets of V-shaped positioning components to periodically move closer or further away, actively shaping and correcting the silicon steel sheets during the lamination process, and constraining the overall profile of the stepped area.

[0012] The clamping mechanism includes a transmission component rotatably connected to the base, and two movable plates connected to the two output ends of the transmission component via connecting plates; gripping plates are detachably installed at both ends of the movable plates, and the transmission component clamps or releases the stacked beams.

[0013] The lifting assembly includes a lead screw drive assembly rotatably connected to the bottom of the base, with a handwheel at the bottom of the lead screw; the lifting seat is provided with a limit slot, and a limit rod connected to the base is inserted into the limit slot, and the height of the lifting seat is adjusted by the handwheel.

[0014] The drive assembly includes telescopic components symmetrically installed on both sides of the lifting seat, with a mounting plate installed at the output end of the telescopic components, and a V-shaped positioning component detachably connected to the mounting plate.

[0015] The mounting platform has a T-shaped groove, in which a T-shaped sliding plate is slidably connected. A support spring is provided between the T-shaped sliding plate and the inner wall of the groove. The T-shaped sliding plate is connected to the mounting foot plate through a rotating column, and a V-shaped positioning component is fixed to the mounting foot plate.

[0016] The pressure plate is slidably connected within the T-shaped groove, and the support spring is located between the pressure plate and the T-shaped slide plate.

[0017] The mounting plate is threaded to connect to a lead screw, one end of which extends into a sliding groove and is rotatably connected to the pressure plate, for adjusting the preload of the support spring.

[0018] The T-shaped slide has an opening at one end, and a front baffle can be detachably connected to the opening to prevent the T-shaped slide from coming off.

[0019] The rotation adjustment structure includes a mounting slot at the bottom of the base and a limiting rod on the lifting seat. By removing the limiting rod, the base can rotate 90° to switch between placement conditions.

[0020] The V-shaped positioning component is mass-produced using molds, and the corresponding model can be changed according to the specifications of the widened iron core.

[0021] By employing the above technical solution, the present invention has at least the following beneficial effects:

[0022] 1. During the lamination process of widened iron cores, due to the width variation of the iron core in the height direction, there is often a lack of clear alignment standards for the silicon steel sheets at the step transition positions. Traditional methods mainly rely on manual alignment and tapping, which is not only time-consuming and labor-intensive, but also easily leads to inconsistent lamination positions due to differences in human experience, and the deviation will continue to accumulate with each layer.

[0023] This invention sets up a positioning and shaping structure that matches the stepped contour of the core during the lamination process of the variable-width iron core. It performs periodic active shaping and correction during the lamination process, so that the silicon steel sheets can be pulled back to the correct position in time at each stage of lamination. This effectively avoids the problems of skewing, misalignment or uneven steps of the silicon steel sheets in the width variation area, improves the core lamination accuracy, and reduces the reliance on manual experience.

[0024] 2. This invention eliminates the need for manual repositioning or aligning of silicon steel sheets during the lamination process, significantly reducing the labor intensity of operators and improving the stability and consistency of the lamination operation of the variable-width iron core.

[0025] 3. This invention can be adjusted according to the thickness of the stacked beam and the placement direction of the iron core, and is applicable to the working conditions of variable-width iron core lamination with different specifications and placement methods. It has strong applicability and improves the versatility and practicality of the equipment.

[0026] 4. The present invention can maintain the alignment of the stepped structure of the widened iron core during the lamination process, and avoid the cumulative deviation of the stepped structure during the layer-by-layer stacking process. This helps to ensure the consistency and stability of the iron core structure, and provides a reliable guarantee for the subsequent iron core assembly and the overall performance of the transformer.

[0027] Specifically, V-shaped positioning components can be mass-produced using corresponding molds. Moreover, these components are not merely for simple clamping of silicon steel sheets; they address the technical challenge of lacking a unified positioning benchmark for the stepped contour during the lamination process of widened iron cores, where deviations easily accumulate layer by layer. By periodically and actively shaping and correcting the silicon steel sheets during lamination, the overall contour of the stepped area is constrained. This technique breaks through the existing approach of relying on manual experience or simple correction using straight baffles.

[0028] 5. This invention can be used as an auxiliary tooling and can be directly applied to existing commonly used stacking beams without requiring major modifications to existing stacking equipment. It has strong versatility and is conducive to rapid promotion and application on existing production lines. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the transformer core positioning and assembly device provided in Embodiment 1 of the present invention;

[0030] Figure 2 for Figure 1 Side view;

[0031] Figure 3 This is a schematic diagram of the internal structure of the transformer core positioning and assembly device provided in Example 1;

[0032] Figure 4This is a schematic diagram of the transformer core positioning and assembly device provided in Embodiment 2 of the present invention;

[0033] Figure 5 This is a partial structural schematic diagram of the transformer core positioning and assembly device provided in Embodiment 2 of the present invention;

[0034] Figure 6 This is a schematic diagram of the limiting rod being unscrewed in the transformer core positioning and assembly device provided in Embodiment 2 of the present invention;

[0035] Figure 7 This is a schematic diagram showing the connection between the V-shaped positioning component and the connecting plate in this invention;

[0036] Figure 8 This is a schematic diagram showing the connection between the mounting foot plate and the mounting platform in this invention;

[0037] In the picture:

[0038] 1. Stacked beam; 2. Variable width iron core; 3. Base; 4. Threaded rod; 5. Nut; 6. Moving plate; 7. Grab plate; 8. Lifting seat; 9. Electric telescopic rod; 10. Side plate; 11. Connecting plate; 12. Mounting platform; 13. V-shaped positioning component; 14. Mounting foot plate; 15. First lead screw; 16. Handwheel; 17. Limiting rod; 18. Mounting slot; 19. T-shaped sliding plate; 20. T-shaped sliding groove; 21. Front baffle; 22. Support spring; 23. Pressure plate; 24. Second lead screw; 25. Rotating column; 26. Soft pad. Detailed Implementation

[0039] To better explain and facilitate understanding of the present invention, the technical solution and effects of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] Example 1

[0041] like Figures 1-3 As shown, this embodiment provides a transformer core positioning and assembly device. The widened core 2 is placed along the length of the stacking beam 1, specifically including a base 3, which is located below the stacking beam 1, which serves as a direct fixing platform. In use, the base 3 and the stacking beam 1 are in a relatively fixed positional relationship.

[0042] The base 3 is rotatably connected to a threaded rod 4, which can be manually or electrically driven as needed. Furthermore, the threaded rod 4 has two oppositely directed external threads, designated as thread one and thread two, respectively, with nuts 5 screwed onto each thread. A movable plate 6 located outside the base 3 is fixedly connected to the top of each nut 5 via a connecting block. Grab plates 7 are detachably mounted at both ends of the movable plate 6. The movable plates 6 connected to the two nuts 5 move closer or further apart as the threaded rod 4 rotates, causing the grab plates 7 on the two movable plates 6 to move closer or further apart. When the grab plates 7 move closer together, they grip the stacking beam 1, thus achieving rapid positioning and reliable fixation of the base 3 relative to the stacking beam 1.

[0043] The base 3 is equipped with a lifting component for moving the base 3 up and down.

[0044] The lifting assembly includes a lifting seat 8 movably connected to the base 3. Specifically, the lifting seat 8 is movably connected to the base 3 via a first lead screw 15, and the lifting seat 8 is threadedly connected to the first lead screw 15. Furthermore, electric telescopic rods 9 are pre-embedded on both sides of the lifting seat 8, and the two electric telescopic rods 9 are symmetrically installed. A side plate 10 is fixedly connected to the end of the output shaft of each electric telescopic rod 9, and a mounting platform 12 is extended from the side plate 10 via a connecting plate 11. A V-shaped positioning component 13 is installed on the mounting platform 12. The extension and retraction of the electric telescopic rods 9 causes the mounting platform 12 and the V-shaped positioning component 13 on it to move closer or further apart, for clamping and fixing the widened iron core 2.

[0045] Specifically, the first lead screw 15 is rotatably connected to the bottom of the base 3, and the lifting seat 8 is threadedly connected to the first lead screw 15. A handwheel 16 is fixedly connected to the bottom end of the first lead screw 15. By rotating the handwheel 16, the first lead screw 15 can be driven to rotate, thereby realizing the up and down movement of the lifting seat 8. Furthermore, a limit slot is formed longitudinally on the lifting seat 8, and a limit rod 17 is movably inserted into the limit slot. One end of the limit rod 17 is installed at the bottom of the base 3. By rotating the first lead screw 15 by the handwheel 16, the position of the lifting seat 8 relative to the base 3 can be adjusted, thereby adjusting the height of the V-shaped positioning member 13 to correspond to the stacked silicon steel sheets, so as to accommodate stacked beams 1 of different thicknesses.

[0046] Furthermore, the mounting platform 12 and the V-shaped positioning component 13 are detachably connected. The mounting platform 12 has a T-shaped groove 20, and a T-shaped sliding plate 19 is slidably connected within the T-shaped groove 20. Specifically, the inward-facing end of the T-shaped groove 20 is open for the T-shaped sliding plate 19 to slide into; after the T-shaped sliding plate 19 slides in, the opening is closed by a front baffle 21. A support spring 22 is provided between the T-shaped sliding plate 19 and the inner wall of the T-shaped groove 20 to provide elastic support for the T-shaped sliding plate 19. Through the elastic support of the support spring 22, the V-shaped positioning component 13, when being pushed towards the widened iron core 2 for shaping, can generate controlled elastic displacement under a large reaction force, thereby avoiding localized stress concentration or warping deformation at the edge of the silicon steel sheet caused by rigid pressure, thus improving the stability and safety of the shaping process.

[0047] Meanwhile, the mounting foot plate 14 and the T-shaped sliding plate 19 are relatively movable. Specifically, the mounting foot plate 14 is detachably mounted on the T-shaped sliding plate 19 via a rotating column 25, allowing for free replacement. The rotating column 25 is fixedly installed at the bottom center of the mounting foot plate 14 and rotatably installed in a groove on the top surface of the T-shaped sliding plate 19, enabling the mounting foot plate 14 to rotate freely relative to the T-shaped sliding plate 19 within a small angle range. During the shaping and advancing process, when the V-shaped positioning component 13 and the stepped contour of the widened iron core 2 experience asymmetrical contact due to slight axial tilt, it automatically adjusts its posture through adaptive rotation at a small angle. This allows the stepped inner wall of the V-shaped positioning component 13 to gradually form surface or multi-point contact with the stepped contour of the iron core, thereby preventing concentrated stress on the rigid structure in localized areas due to posture mismatch.

[0048] In addition, a soft pad 26 is provided between the mounting foot plate 14 and the T-shaped sliding plate 19. The soft pad 26 consists of two parts, which are located on both sides of the bottom of the mounting foot plate 14, and the soft pad 26 contacts the top surface of the T-shaped sliding plate 19. When the V-shaped positioning member 13 is subjected to lateral reaction force or undergoes slight posture adjustment, the soft pad 26 can play a role in buffering, vibration reduction and posture correction, so that the V-shaped positioning member 13 can better maintain a stable fit with the stepped contour of the widened iron core 2 during the shaping process.

[0049] During the actual lamination process of the widened iron core 2, due to factors such as the accumulation of silicon steel sheet stacking tolerances or uneven weight distribution of the iron core itself, the overall axis of the widened iron core 2 often exhibits a slight tilt during the lamination stage. If a rigid, fixed shaping structure is used for alignment, single-point or localized strong pressure can easily form at a certain location on the iron core during the shaping process. This not only hinders the uniform correction of the overall stepped profile but also easily generates excessive lateral compressive force at localized locations. However, in the device provided in this application, by setting an elastic support structure between the V-shaped positioning member 13 and the mounting plate 12, the shaping process is transformed from rigid top pressure to controlled elastic contact. This buffers and disperses the shaping contact process even when there is a slight deviation in the iron core axis, thereby significantly reducing the risk of single-point strong pressure.

[0050] Furthermore, one end of the support spring 22 abuts against the pressure plate 23, which is also slidably connected within the T-shaped groove 20. The support spring 22 is positioned between the pressure plate 23 and the T-shaped slide plate 19. The second lead screw 24 passes through the outside of the mounting plate 12 and enters the T-shaped groove 20, pressing the support spring 22 from one side of the pressure plate 23, thereby adjusting the preload of the support spring 22. Figures 7-8 As shown. Specifically, the second lead screw 24 is threaded onto the mounting plate 12, and one end of the second lead screw 24 located in the T-shaped groove 20 is rotatably connected to the pressure plate 23. Thus, by rotating the second lead screw 24, the position of the pressure plate 23 can be adjusted, thereby adjusting the preload of the support spring 22. Furthermore, the forming force can be specifically matched according to the different specifications of the widened iron core 2, different stacking height stages, and different silicon steel sheet thicknesses, avoiding the formation effect being affected by excessive or insufficient forming force.

[0051] The inner wall of the V-shaped positioning member 13 is stepped, corresponding to the stepped contour of the edge of the standard widened iron core 2. During stacking, after each layer or several layers of silicon steel sheets are placed, the two V-shaped positioning members 13 are moved towards the widened iron core 2, so that the stepped inner wall of the V-shaped positioning member 13 makes close contact with the edge of the currently stacked silicon steel sheets. The shape of the inner wall of the V-shaped positioning member 13 is used to shape the stacked silicon steel sheets, thereby adjusting their position and preventing skewing, misalignment, or uneven steps during stacking. After adjustment, the two V-shaped positioning members 13 move away from the silicon steel sheets, allowing for further placement of silicon steel sheets, and this process is repeated. This method enables periodic active shaping and correction of the silicon steel sheets during stacking, improving stacking accuracy and overall stacking efficiency, avoiding reliance on manual repositioning or aligning, and reducing labor intensity.

[0052] The V-shaped positioning component 13 not only enables rapid assembly and disassembly and reliable positioning, but also provides comprehensive functions such as elastic buffering, adaptive micro-swing, and adjustable shaping force. This further improves the stability of the shaping operation during the lamination of the widened iron core 2. The V-shaped positioning component 13 is designed to address the specific technical problem of the lack of a unified positioning benchmark for the stepped profile during the lamination process of the widened iron core 2, where deviations easily accumulate during layer-by-layer stacking. It introduces the standard stepped profile of the widened iron core 2 into the inner wall structure of the V-shaped positioning component 13, and, in conjunction with the periodic active shaping method during the lamination process, constrains the overall profile of the stepped area. This design differs from conventional V-shaped components not only in its structural form but also in its mode of operation and control sequence, achieving a shift from local limiting to overall profile shaping.

[0053] Example 2

[0054] like Figures 4-6 As shown, this embodiment provides a transformer core positioning and assembly device, in which the widened core 2 is placed perpendicular to the length direction of the stacking beam 1. This embodiment has the same structural composition as the device provided in Embodiment 1. In use, the limiting rod 17 is first unscrewed from the mounting slot 18 at the bottom of the base 3. After the limiting rod 17 is unscrewed, the base 3 loses its restriction, allowing it to be rotated relative to the lifting seat 8 for adjustment. The base 3 is rotated ninety degrees, and then the limiting rod 17 is reinstalled. Figure 5 As shown, this is applicable to the case where the widened iron core 2 is placed perpendicular to the length direction of the stacked beam 1.

[0055] Preferably, the limiting rod 17 is provided in two parts, with the top end screwed into the mounting slot 18 at the bottom of the base 3. The mounting slot 18 is evenly provided in four parts at the bottom of the base 3, so as to ensure structural stability and facilitate quick switching of working states in different placement directions.

[0056] The transformer core positioning and assembly device in the two embodiments of this application addresses the actual working conditions in the lamination operation of widened core 2, where the device positioning reference is inconsistent, the working height changes frequently, and the core placement direction is prone to deviation. The overall structure does not adopt the common ground-fixed, single-direction, or single-height assembly structure found in the prior art. Instead, it uses the stacking beam 1 as a direct fixing platform. This method of using the stacking beam 1 as a direct fixing platform achieves synchronous positioning of the device and the lamination reference by gripping the stacking beam 1, fundamentally avoiding cumulative deviations caused by equipment installation errors or uneven ground. Simultaneously, the independently adjustable lifting seat 8 structure allows the device to adapt in real time to changes in lamination height, solving the problem in the prior art where positioning devices struggle to accommodate different lamination heights and require frequent disassembly, assembly, or tooling replacement. Furthermore, the rotatable design relative to the lifting seat 8 allows the same assembly device to be used for situations where the core is placed along different directions of the stacking beam 1, avoiding the practice of configuring different tooling for different placement directions on existing production lines. The combination and synergy of all the above features achieve the technical goals of overall device stability, high adaptability, and universality under various working conditions, enabling V-shaped positioning, periodic active shaping, and prevention of cumulative deviation.

Claims

1. A transformer core positioning and assembly device, characterized in that, include: The base is detachably fixed to the stacking beam via a clamping mechanism, and the stacking beam is a direct fixing platform; The lifting seat is movably connected to the base via a lifting assembly, adapting to different stacking beam thicknesses and stacking plate heights; The rotating adjustment structure is located between the base and the lifting seat, which is suitable for the placement of the widened iron core along the length of the stacked beam or the vertical length direction. Two sets of symmetrical drive components are installed on the lifting platform; The V-shaped positioning component is connected to the output end of the drive assembly. The inner wall of the V-shaped positioning component is stepped, matching the standard stepped profile of the widened iron core. The drive assembly drives the two sets of V-shaped positioning components to periodically move closer or further away, actively shaping and correcting the silicon steel sheets during the lamination process, and constraining the overall profile of the stepped area.

2. The transformer core positioning and assembly device according to claim 1, characterized in that: The clamping mechanism includes a transmission component rotatably connected to the base, and two movable plates connected to the two output ends of the transmission component via connecting plates; gripping plates are detachably installed at both ends of the movable plates, and the transmission component clamps or releases the stacked beams.

3. The transformer core positioning and assembly device according to claim 1, characterized in that: The lifting assembly includes a lead screw drive assembly rotatably connected to the bottom of the base, with a handwheel at the bottom of the lead screw; the lifting seat is provided with a limit slot, and a limit rod connected to the base is inserted into the limit slot, and the height of the lifting seat is adjusted by the handwheel.

4. The transformer core positioning and assembly device according to claim 1, characterized in that: The drive assembly includes telescopic components symmetrically installed on both sides of the lifting seat, with a mounting plate installed at the output end of the telescopic components, and a V-shaped positioning component detachably connected to the mounting plate.

5. A transformer core positioning and assembly device according to claim 4, characterized in that: The mounting platform has a T-shaped groove, in which a T-shaped sliding plate is slidably connected. A support spring is provided between the T-shaped sliding plate and the inner wall of the groove. The T-shaped sliding plate is connected to the mounting foot plate through a rotating column, and a V-shaped positioning component is fixed to the mounting foot plate.

6. A transformer core positioning and assembly device according to claim 5, characterized in that: The pressure plate is slidably connected within the T-shaped groove, and the support spring is located between the pressure plate and the T-shaped slide plate.

7. A transformer core positioning and assembly device according to claim 6, characterized in that: The mounting plate is threaded to connect to a lead screw, one end of which extends into a sliding groove and is rotatably connected to the pressure plate, for adjusting the preload of the support spring.

8. A transformer core positioning and assembly device according to claim 5, characterized in that: The T-shaped slide has an opening at one end, and a front baffle can be detachably connected to the opening to prevent the T-shaped slide from coming off.

9. A transformer core positioning and assembly device according to claim 1, characterized in that: The rotation adjustment structure includes a mounting slot at the bottom of the base and a limiting rod on the lifting seat. By removing the limiting rod, the base can rotate 90° to switch between placement conditions.

10. A transformer core positioning and assembly device according to claim 1, characterized in that: The V-shaped positioning component is mass-produced using molds, and the corresponding model can be changed according to the specifications of the widened iron core.

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