A transformer core automatic lamination device and lamination method

Abstract

The application relates to the technical field of transformer production, and provides a transformer core automatic lamination device and a lamination method. The transformer core automatic lamination device comprises an outer frame, a synchronous lifting feeding table, a self-adaptive lifting lamination platform, a top suspension and a plurality of transfer lamination mechanisms; the feeding table is synchronously driven by a single motor to realize synchronous lifting of five groups of silicon steel sheet stacks, and a plurality of independent lifting drives are cancelled; the transfer lamination mechanism integrates a suction disc, a plate, a magnetic lamination and a center positioning mechanism, and after taking materials, the silicon steel sheet correction is directly completed at the suction disc station, and a separate positioning and transfer station is not needed; the suspension is provided with a plurality of bidirectional drive groups and a middle column unidirectional drive group, and the silicon steel sheets of the upper and lower yokes and the two side columns are bidirectionally and oppositely fed in a nearby mode, so that the suction disc moving stroke is greatly shortened; the defects of poor transmission synchronization, many transfer processes, long stroke, low lamination precision, large equipment occupation and high cost of the existing equipment are solved.

Description

Technical Field

[0001] This invention relates to the field of transformer manufacturing technology, and in particular to an automatic lamination device and method for transformer cores. Background Technology

[0002] A three-phase, three-limb transformer core is composed of an upper yoke, a lower yoke, and three upright silicon steel laminations. Currently, automated transformer core lamination equipment has several shortcomings: The existing equipment has five silicon steel sheet stacks, each equipped with an independent lifting drive mechanism. This results in a large number of lead screws and motors, leading to high equipment costs. Furthermore, the multiple independent transmission systems have large cumulative errors, poor synchronization, and a high failure rate. After the silicon steel sheets are picked up, they need to be transferred to an independent positioning station for calibration. This involves multiple transfer processes, including picking, transferring, positioning, and re-transferring for stacking. The arrangement of the mechanism occupies a lot of space, and multiple transfers reduce the stacking accuracy. Thin silicon steel sheets are prone to shaking and warping during long-distance transport, which affects the joint accuracy. Traditional stacking mechanisms have material stacks located far from the stacking station, long suction cup travel distances, and single stacking travel distances can reach more than 2 meters, resulting in long cycle times and limited production efficiency. The upper and lower yokes and the column silicon steel sheets are fed from a long distance from one side, resulting in a large driving stroke. Long-term reciprocating motion further amplifies the positioning deviation, making it difficult to meet the requirements of high-precision stacking production. Summary of the Invention

[0003] The purpose of this invention is to propose an automatic lamination device and method for transformer cores, which simplifies the transmission structure, eliminates synchronization errors of multiple mechanisms, integrates a material picking and positioning structure, shortens the material movement stroke, realizes adaptive dynamic compensation of lamination height, improves lamination accuracy and production efficiency, reduces the overall machine footprint, and lowers equipment manufacturing costs.

[0004] To achieve the above objectives, the technical solution of the present invention is implemented as follows: An automatic lamination device for transformer cores includes an outer frame, a loading platform, a lamination platform, a suspension frame, and a transfer and lamination mechanism; The loading platform is located in the middle of the outer frame to support five stacks of silicon steel sheets. An opening is opened in the middle of the loading platform, and a stacking platform is arranged inside the opening. The outer frame column is equipped with four sets of loading screws. The loading platform is fixed to the loading screw sleeve. A single loading motor is set on the top of the outer frame, which works with a gearbox and a drive shaft to synchronously drive the four loading screws, thereby driving the loading platform and all the stacks of silicon steel sheets to rise and fall synchronously. The suspension is fixed to the top of the outer frame. Two sets of first supports are provided in the length direction of the suspension and two sets of second supports are provided in the width direction. Three sets of transfer and stacking mechanisms are arranged below the first supports for stacking the three iron core columns. Two sets of transfer and stacking mechanisms are arranged below the second supports for stacking the upper and lower yokes. The transfer and stacking mechanism includes a fixed frame, a movable frame, suction cups, and a centering positioning mechanism; a guide group and a lifting cylinder are provided between the fixed frame and the movable frame, and multiple suction cups are assembled at the bottom of the movable frame; the centering positioning mechanism includes a plate and a fourth bidirectional drive group, the plate has a strip hole for the suction cups to pass through, magnetic patches are arranged on the lower surface of the plate, a limiting baffle is provided on one side of the plate, and the fourth bidirectional drive group drives the paddle inside the strip hole to complete the lateral limiting and length centering positioning of the silicon steel sheet; The suspension is equipped with a second bidirectional drive group, a third bidirectional drive group and a center pillar drive group; the second bidirectional drive group drives the two sets of transfer and superimposed mechanisms of the upper and lower yokes to move towards each other, the third bidirectional drive group drives the transfer and superimposed mechanisms of the two side pillars to move towards each other, and the center pillar drive group drives the transfer and superimposed mechanism of the middle pillar to align in one direction. The stacking platform includes a stacking frame, a stacking lifting motor, and a stacking lifting frame. The stacking lifting motor synchronously drives the lifting screws on both sides to vertically lift the stacking lifting frame. The stacking lifting frame is equipped with a first bidirectional drive group, which drives the upper yoke support and the lower yoke support to open and close synchronously, adapting to the spacing of yokes of different specifications of iron cores. The first, second, third, and fourth bidirectional drive groups have the same structure and working principle, and all use bidirectional screws with positive and negative threads in conjunction with bidirectional motors to realize synchronous opposite / reverse movement of the slides at both ends.

[0005] Furthermore, in the centering positioning mechanism, the lower surface of the paddle and baffle is lower than the lower surface of the magnetic patch. After the suction cup rises, the silicon steel sheet adheres to and is adsorbed onto the bottom of the magnetic patch, thus suppressing the deformation of the sheet during transport.

[0006] Furthermore, the second and third bidirectional drive groups on the suspension are arranged vertically and alternately, with no movement interference from the lead screw; the center column drive group adopts a unidirectional lead screw and a unidirectional motor to independently drive the intermediate column transfer and stacking mechanism.

[0007] Furthermore, the stacking platform lifting guide rail, feeding screw, and each set of bidirectional drive guide rails are all equipped with slider guides to improve the stability of the mechanism's movement and the accuracy of positioning repeatability.

[0008] Compared with the prior art, the present invention has the following beneficial effects: 1. Integrated synchronous feeding structure: Only one feeding motor is used in conjunction with a synchronous transmission mechanism to drive the lifting of the entire feeding platform, which synchronously drives the five sets of silicon steel sheet stacks to feed synchronously. This eliminates the need for five independent lifting systems, reduces the number of motor and lead screw parts, lowers equipment costs, and eliminates the cumulative synchronization error of multiple transmission mechanisms. 2. A centering and positioning mechanism is integrated on the mounting plate of the transfer and stacking mechanism. After the silicon steel sheet is picked up, the alignment is completed directly at the suction cup station, without the need for an additional independent positioning table, thus saving the need for secondary transfer. 3. With the help of magnetic patches to temporarily adsorb silicon steel sheets, the vibration and deformation during the thin sheet conveying process are suppressed, which greatly improves the accuracy of the stacked joints; even if the negative pressure of the suction cup fluctuates, the silicon steel sheets are not easy to fall off, and the operation stability is stronger. 4. Nearby bidirectional feeding layout: The silicon steel sheet stacks are arranged around the stacking platform. The upper and lower yokes and the two side columns adopt bidirectional opposite-direction feeding, which greatly shortens the suction cup movement stroke. The minimum movement distance is 0.2 meters, which is one-tenth of the original distance. The maximum movement distance of the central column is reduced by nearly half, shortening the single stacking cycle time and improving the production cycle. 5. Adaptive Height Following of Stacking Platform: During the stacking process, the loading platform and stacking platform are dynamically linked and raised to ensure a constant height for picking up and stacking silicon steel sheets, avoiding stacking misalignment caused by height differences as the thickness of the stacking sheets increases; after stacking is completed, the platform is lowered to support forklifts to remove the iron core as a whole, making unloading convenient; 6. Compact structure and smaller footprint: The elimination of the external positioning mechanism shortens the transfer stroke, significantly reducing the overall size of the machine, making it suitable for layouts in workshops with limited space; the modular design of each group's bidirectional drive facilitates assembly and maintenance; 7. High versatility: By adjusting the spacing between the upper yoke support and the transfer and stacking mechanisms of each group through the bidirectional drive group, it can be adapted to the production of three-phase three-column iron core laminations of various specifications. Attached Figure Description

[0009] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0010] In the attached diagram: Figure 1 A schematic diagram of the overall structure of the automatic lamination device for transformer cores; Figure 2 A schematic diagram of the lamination platform of the automatic lamination device for transformer cores in the lowered state; Figure 3 A schematic diagram of the outer frame and loading platform installation structure of the automatic lamination device for transformer cores; Figure 4 This is a schematic diagram of the overall structure of the lamination platform; Figure 5 A schematic diagram of the lifting and lowering process of the lamination platform in an automatic lamination device for transformer cores. Figure 6 A schematic diagram of the installation structure for the stacked platform frame; Figure 7 A schematic diagram showing the open state of the five transfer and overlapping mechanisms on the outer side of the suspension; Figure 8 This is a schematic diagram of the upper and lower yoke lamination process in the suspension section; Figure 9 This is a schematic diagram of the stacking process of the three sets of pillar plates in the suspension section; Figure 10 This is a schematic diagram of the overall structure of the transfer and stacking mechanism; Figure 11A partial side view of the cylinder retracted state of the transfer and stacking mechanism; Figure 12 A schematic diagram showing the cylinder extension state of the transfer and stacking mechanism; Figure 13 A schematic diagram of the bottom structure of the plate in the extended state of the cylinder of the transfer and stacking mechanism; Figure 14 A schematic diagram of the centering positioning mechanism above the mounting plate of the transfer and stacking mechanism; Explanation of reference numerals in the attached figures: 1. Outer frame; 1001. Feeding screw; 1002. Feeding sleeve; 1003. Feeding motor; 2. Loading platform; 201. Opening; 3. Stacking platform; 3001. Stacking platform frame; 3002. Stacking platform lifting motor; 3003. Stacking platform lifting frame; 3004. Stacking platform lifting guide rail; 3005. Stacking platform slider; 3006. Stacking platform lifting screw; 3007. Stacking platform lifting sleeve; 3008. First bidirectional drive group; 3009. Upper yoke support; 3010. Lower yoke support; 4. Suspension; 4001. First bracket; 4002. Second bracket; 4003. Second bidirectional drive group; 4004. Third bidirectional drive group; 4005. Center column drive group; 4006. One-way base; 4007. One-way lead screw; 4008. One-way guide rail; 4009. One-way bearing seat; 4010. One-way motor; 4011. One-way threaded sleeve; 4012. One-way slide block; 4013. One-way slider; 5. Transfer and stacking mechanism; 5001. Fixed frame; 5002. Movable frame; 5003. Suction cup; 5004. Centering positioning mechanism; 5005. Guide group; 5006. Cylinder; 5007. Fixed base; 5008. Plate; 5009. Fourth bidirectional drive group; 5010. Support column; 5011. Strip hole; 5012. Reinforcing base; 5013. Lever; 5014. Paddle; 5015. Baffle; 5016. Magnetic patch; 6. Gearbox; 7. Drive shaft; 8001, bidirectional base; 8002, bidirectional lead screw; 8003, bidirectional guide rail; 8004, bidirectional bearing housing; 8005, bidirectional motor; 8006, bidirectional threaded sleeve; 8007, bidirectional slide block; 8008, bidirectional slider. Detailed Implementation

[0011] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0012] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "back" appear, indicating orientation or positional relationship, these are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0013] Furthermore, in the description of this invention, unless otherwise explicitly defined, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention in light of the specific circumstances.

[0014] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0015] This embodiment relates to an automatic lamination device for transformer cores. In terms of overall structure, as follows... Figure 1-14 As shown, it includes: Outer frame 1; The loading platform 2, located in the middle of the outer frame 1, is used to support the stack of silicon steel sheets to be stacked and to adjust the loading height; the loading platform 2 has an opening 201 in the middle; the structure of the loading platform 2 is as follows Figure 3 As shown, the outer periphery of opening 201 is used to place the silicon steel sheet stacks before stacking. The left side is the upper yoke silicon steel sheet stack, the right side is the lower yoke silicon steel sheet stack, the front side is the one-sided column silicon steel sheet stack and the middle column silicon steel sheet stack, and the rear side is the other-sided column silicon steel sheet stack; a total of five sets of silicon steel sheet stacks to be stacked are formed. All five sets of silicon steel sheet stacks are located on the upper surface of the loading platform 2, and the top silicon steel sheets of the five sets of silicon steel sheet stacks are always aligned. In traditional automatic stacking equipment, the five sets of silicon steel sheet stacks to be stacked are driven by independent screw drive systems, which not only greatly increases the equipment cost, but also causes the working errors of the screw drive systems of the five sets of silicon steel sheet stacks to be stacked to be superimposed, resulting in large errors in the stacking process and a high equipment failure rate.

[0016] The lamination platform 3 is located in the middle of the opening 201 and is used to place the iron core laminations; the upper yoke support 3009 and the lower yoke support 3010 on the suspension platform 4 are used to place the iron core laminations.

[0017] The suspension 4 is fixedly installed inside the top of the outer frame 1. Two sets of first supports 4001 are provided below the suspension 4 in the length direction and two sets of second supports 4002 are provided in the width direction. A transfer and stacking mechanism 5, located below the suspension 4, is used to adsorb the uppermost silicon steel sheet on the silicon steel sheet stack lifting mechanism and transfer it to the stacking platform 3. The transfer and stacking mechanism 5 includes a fixed frame 5001, a movable frame 5002, a suction cup 5003, and a centering positioning mechanism 5004. The movable frame 5002 is located directly below the fixed frame 5001. A guide group 5005 and a cylinder 5006 are provided between the movable frame 5002 and the fixed frame 5001. The cylinder 5006 drives the movable frame 5002 to move up and down. Multiple fixed seats 5007 are provided below the movable frame 5002, and the suction cup 5003 is fixedly mounted on the fixed seats 5007. A feeding screw 1001 is provided on one side of the column of the outer frame 1. A feeding sleeve 1002 is provided on the feeding screw 1001. A feeding platform 2 is provided inside the outer frame 1. The feeding platform 2 is fixedly installed on four feeding sleeves 1002. A feeding motor 1003 and multiple gearboxes 6 are fixedly installed on the top of the outer frame 1. The feeding motor 1003, gearboxes 6 and drive shaft 7 drive the four feeding screws 1001 to rotate synchronously, and drive the feeding platform 2 to move up and down through the four feeding sleeves 1002.

[0018] It should be noted that, as Figure 1-3 As shown, the feeding motor 1003 drives four feeding screws 1001 to rotate synchronously through a coupling, transmission shaft 7, and gearbox 6. The upper end of the feeding screw 1001 is connected to the corresponding gearbox 6 above, and the lower end is connected to the bearing seat. The bearing seat is fixed on the column of the outer frame 1. Because the feeding sleeve 1002 and the feeding screw 1001 are threadedly engaged, when the feeding screw 1001 rotates, it will drive the feeding sleeve 1002 to move up and down, thereby driving the feeding platform 2 to move up and down, thereby driving the five sets of silicon steel sheets to be stacked to move up and down synchronously. The synchronous up and down movement of the five sets of silicon steel sheets to be stacked can be achieved by a single feeding motor 1003, realizing the lifting action of the feeding platform 2.

[0019] The stacking platform 3 includes a stacking frame 3001, a stacking lifting motor 3002, and a stacking lifting frame 3003. The stacking frame 3001 is located in the center of the opening 201. A stacking lifting guide rail 3004 is vertically arranged on the outer periphery of the stacking frame 3001. A stacking slider 3005 is arranged on the stacking lifting frame 3003, and the stacking slider 3005 and the stacking lifting guide rail 3004 are slidably engaged. The stacking frame 3001 has vertically arranged guide rails 3004 on both sides. A stacking platform lifting screw 3006 is provided, and stacking platform lifting sleeves 3007 are provided on both sides of the stacking platform lifting frame 3003. The stacking platform lifting sleeves 3007 and the stacking platform lifting screw 3006 cooperate with each other. The stacking platform lifting motor 3002 is located at the bottom of the stacking platform frame 3001. The stacking platform lifting motor 3002, the gearbox 6 and the drive shaft 7 drive the stacking platform lifting screws 3006 on both sides to rotate, and drive the stacking platform lifting frame 3003 to move up and down through the stacking platform lifting sleeves 3007.

[0020] It should be noted that, as Figure 4-5 As shown, when the stacking platform lifting motor 3002 is working, it drives the stacking platform lifting screws 3006 on both sides to rotate synchronously through the gearbox 6, transmission shaft 7 and coupling. The rotation of the stacking platform lifting screws 3006 drives the stacking platform lifting sleeves 3007 to move up and down, thereby driving the stacking platform lifting frame 3003 to move up and down synchronously through the stacking platform lifting sleeves 3007. The stacking platform slider 3005 and the stacking platform lifting guide rail 3004 on the outer periphery of the stacking platform lifting frame 3003 slide together to guide the up and down movement of the stacking platform lifting frame 3003. The above realizes the up and down movement of the stacking platform lifting frame 3003.

[0021] The stacking platform lifting frame 3003 has a first bidirectional drive group 3008 arranged in the width direction in the middle. The first bidirectional drive group 3008 includes a bidirectional base 8001, a bidirectional lead screw 8002, and a bidirectional guide rail 8003. Bidirectional bearing seats 8004 are provided at both ends of the lead screw, and the bidirectional bearing seats 8004 are fixedly mounted on the bidirectional base 8001. A bidirectional motor 8005 is provided on the bidirectional lead screw 8002 for driving the lead screw to rotate. The threads on both sides of the middle of the bidirectional lead screw 8002 rotate in opposite directions, and bidirectional thread sleeves 8006 are respectively provided on both sides of the middle of the bidirectional lead screw 8002. A bidirectional slide block 8007 is fixedly mounted on the bidirectional thread sleeve 8006. Bidirectional sliders 8008 are slidably engaged on both sides of the bidirectional guide rail 8003. The bidirectional motor 8005, bidirectional guide rail 8003 and bidirectional base 8001 of the first bidirectional drive group 3008 are fixedly mounted on the stacking platform lifting frame 3003; the upper yoke support 3009 and the lower yoke support 3010 are respectively provided on the upper two sides of the stacking platform lifting frame 3003, and the bidirectional slide block 8007 and the bidirectional slider 8008 of the first bidirectional drive group 3008 are fixedly mounted at the bottom of the upper yoke support 3009 and the lower yoke support 3010 respectively.

[0022] It should be noted that, as Figure 6 As shown, when the bidirectional motor 8005 on the first bidirectional drive group 3008 is working, it drives the bidirectional lead screw 8002 on the first bidirectional drive group 3008 to rotate synchronously through the coupling. Since the threads on both sides of the middle part of the bidirectional lead screw 8002 rotate in opposite directions, when the bidirectional lead screw 8002 rotates, it will drive the corresponding two bidirectional thread sleeves 8006 to move synchronously towards each other or in opposite directions. And through the two bidirectional thread sleeves 8006, it will drive the bidirectional slide 8007 to move, and finally drive the upper yoke support 3009 and the lower yoke support 3010 to move synchronously towards each other or in opposite directions. The bidirectional motor 8005 on the first bidirectional drive group 3008 can drive the upper yoke support 3009 and the lower yoke support 3010 to move towards each other or in opposite directions, realizing the adjustment action of the upper and lower yoke spacing of the iron core.

[0023] The first bidirectional drive group 3008, the second bidirectional drive group 4003, the third bidirectional drive group 4004, and the fourth bidirectional drive group 5009 have similar structures and the same working principle.

[0024] The first bracket 4001 and the second bracket 4002 are respectively provided with a second bidirectional drive group 4003 and a third bidirectional drive group 4004; the second bidirectional drive group 4003 and the third bidirectional drive group 4004 are perpendicular to each other, and the second bidirectional drive group 4003 and the first bidirectional drive group 3008 are parallel. The bidirectional motor 8005, bidirectional guide rail 8003 and bidirectional base 8001 of the second bidirectional drive group 4003 and the third bidirectional drive group 4004 are fixedly mounted on the suspension 4, and the bidirectional slider 8008 and bidirectional slide block 8007 are correspondingly fixedly mounted on the top of the fixed frame 5001 on the outer four groups of transfer and stacking mechanism 5. It should be noted that, as Figure 7-9As shown, the two horizontal profiles are the first support 4001, and the two vertical profiles are the second support 4002. The second bidirectional drive group 4003 and the third bidirectional drive group 4004 are staggered vertically, so that the two bidirectional lead screws 8002 complement each other. The bidirectional motor 8005 on the second bidirectional drive group 4003 on the horizontal first support 4001 works, and drives the left and right transfer and overlapping mechanisms 5 to move in opposite directions or in opposite directions through the corresponding bidirectional lead screws 8002, bidirectional lead sleeves 8006 and bidirectional slides 8007. Similarly, the third bidirectional drive group 4004 on the vertical second support 4002 works, and the front and rear transfer and overlapping mechanisms 5 move in opposite directions or in opposite directions. This realizes the driving action of the left and right and front and rear movement of the two sets of transfer and overlapping mechanisms 5 of the upper and lower yokes and the two sets of transfer and overlapping mechanisms 5 of the side columns.

[0025] A central column drive group 4005 is arranged parallel to one side of the third bidirectional drive group 4004. The central column drive group 4005 includes a one-way base 4006, a one-way lead screw 4007, and a one-way guide rail 4008. One-way bearing seats 4009 are provided at both ends of the one-way lead screw 4007. The one-way bearing seats 4009 are mounted on the one-way base 4006. A one-way motor 4010 is provided at one end of the one-way lead screw 4007 for driving the one-way lead screw 4007. Rotation is achieved by: a one-way screw 4007 having a one-way sleeve 4011, and a one-way slide block 4012 being provided on the one-way sleeve 4011; a one-way slider 4013 being slidably fitted on the one-way guide rail 4008; a one-way base 4006, a one-way motor 4010, and a one-way guide rail 4008 being fixedly mounted on the suspension 4; and a one-way slider 4013 and a one-way slide block 4012 being fixedly mounted on a movable frame 5002 on the intermediate transfer and stacking mechanism 5.

[0026] It should be noted that the center column drive group 4005 is a separate center column stacking drive mechanism. When the one-way motor 4010 is working, it drives the one-way lead screw 4007 to rotate, and drives the intermediate transfer stacking mechanism 5 to move back and forth through the one-way lead sleeve 4011 and the one-way slide block 4012, thereby realizing the driving action of the center column moving back and forth.

[0027] The centering positioning mechanism 5004 includes a mounting plate 5008 and a fourth bidirectional drive group 5009; the mounting plate 5008 has support columns 5010 on both sides above it, and the other end of the support column 5010 is fixedly mounted on the fixing frame 5001; the mounting plate 5008 has multiple slotted holes 5011 in the middle, and the suction cup 5003 is disposed in the slotted holes 5011; a reinforcing seat 5012 is fixedly mounted on one side of the slotted hole 5011 above the mounting plate 5008; the first bidirectional drive group 3008, the fourth bidirectional drive group 5009, and the fourth bidirectional drive group 5009 are all part of the centering positioning mechanism 5004. The second bidirectional drive group 4003, the third bidirectional drive group 4004, and the fourth bidirectional drive group 5009 have the same structure; the bidirectional motor 8005, the bidirectional guide rail 8003, and the bidirectional base 8001 of the fourth bidirectional drive group 5009 are fixedly mounted on the reinforcing seat 5012, and the bidirectional slider 8008 and the bidirectional slide block 8007 are fixedly mounted with levers 5013; one end of the lever 5013 is fixedly mounted with a paddle 5014; the paddle 5014 is located inside the strip hole 5011.

[0028] The working principle of the transfer and overlapping mechanism 5 is as follows: Figure 10-14 As shown, when the cylinder 5006 extends, it pushes the movable frame 5002 downward, which in turn drives the suction cup 5003 below to move downward simultaneously. The suction cup 5003 moves downward through the strip hole 5011 and can hold the silicon steel sheet. When the cylinder 5006 retracts, the movable frame 5002 moves upward, thereby lifting the silicon steel sheet.

[0029] It should be noted that because the silicon steel sheet is relatively long and thin, it will vibrate and deform when it is picked up and moved by the suction cup 5003, which will seriously affect the stacking accuracy. The transfer and stacking mechanism 5 designed in this invention allows the silicon steel sheet to move upward when the cylinder 5006 retracts and drives the silicon steel sheet to be picked up. The suction cup 5003 moves upward and passes through the strip hole 5011. The mounting plate 5008 can block the silicon steel sheet. The lower surface of the mounting plate 5008 is flat and can attach the silicon steel sheet on the suction cup 5003 to the mounting plate 5008, thus preventing the silicon steel sheet from vibrating and deforming during movement.

[0030] In a further optimized design, a magnetic patch 5016 is fixedly mounted on the lower surface of the mounting plate 5008 for adsorbing silicon steel sheets; the lower surfaces of the pry bar 5014 and the baffle 5015 are lower than the lower surface of the magnetic patch 5016; after the suction cup 5003 is lifted, the lower surface of the suction cup 5003 and the lower surface of the magnetic patch 5016 are flush; the magnetic patch 5016 can hold the silicon steel sheets at the mounting plate 5008, making the adsorbed silicon steel sheets more flat and stable, greatly improving the positioning accuracy of the silicon steel sheets; and the silicon steel sheets will not fall off even when the suction cup 5003 has low negative pressure or is even released.

[0031] It should be noted that the reinforcement seat 5012 is not only a mounting seat for the fourth bidirectional drive group 5009, but also increases the strength and flatness of the mounting plate 5008.

[0032] A baffle 5015 is provided on the plate 5008 on the side away from the lever 5013 to limit the silicon steel sheet on one side.

[0033] Silicon steel sheet positioning process: When the fourth bidirectional drive group 5009 is working, the bidirectional motor 8005 above the mounting plate 5008 works, thereby driving the two bidirectional slides 8007 to move the levers 5013 on both sides in opposite directions. The movement of the levers 5013 simultaneously drives the paddles 5014 to move synchronously. When the paddles 5014 move synchronously towards the center, they push the inclined edges at both ends of the silicon steel sheet to move synchronously towards the center. At the same time, the silicon steel sheet moves towards the baffle 5015. Under the action of the baffle 5015, one side of the silicon steel sheet can be blocked to achieve positioning of one side of the silicon steel sheet. At the same time, the inclined edges of the silicon steel sheet move towards the center, thereby centering the silicon steel sheet. Centering is performed in the length direction of the silicon steel sheet, and one-sided positioning is performed in the width direction of the silicon steel sheet, realizing the precise positioning process of the silicon steel sheet.

[0034] It should be noted that during the silicon steel sheet positioning process, the silicon steel sheet is always adsorbed under the magnetic patch 5016, and the silicon steel sheet will not deform when it moves. Traditional automatic stacking equipment requires five separate positioning mechanisms to individually pick up the silicon steel sheets at five different positions, place them on the five positioning mechanisms for positioning, and then remove them by the suction cup 5003 for stacking after positioning. This greatly increases the equipment space occupied, equipment cost, and equipment failure rate, and the stacking accuracy is greatly reduced due to multiple transfers. In this invention, while picking up and transferring the silicon steel sheet, it is automatically positioned on the lower surface of the patch 5008 of the transfer and stacking mechanism 5, eliminating the need for multiple transfers and positioning, greatly improving positioning accuracy, and significantly reducing the equipment space occupied and equipment cost.

[0035] When the transfer and stacking mechanism 5 moves to the designated stacking position above the stacking platform 3, the cylinder 5006 extends and the suction cup 5003 moves downward, thereby pushing the silicon steel sheet downward. The silicon steel sheet is separated from the lower magnetic patch 5016 and stacked. The suction cup 5003 is released, the cylinder 5006 retracts, and the suction cup 5003 is lifted.

[0036] The second bidirectional drive group 4003, along with the corresponding transfer and stacking mechanism 5 and the fourth bidirectional drive group 5009, realize the material picking, positioning, and stacking process of the upper and lower yoke silicon steel sheets.

[0037] The material handling, positioning, and stacking process of the three sets of column silicon steel sheets is realized through the third bidirectional drive group 4004, the middle column drive group 4005, the corresponding transfer and stacking mechanism 5, and the fourth bidirectional drive group 5009.

[0038] During the stacking process, the upper yoke support 3009 and lower yoke support 3010 on the feeding platform and stacking platform 3 automatically adjust their heights to ensure that the uppermost silicon steel sheet is always level; the height of the silicon steel sheet remains constant when it is picked up and placed down during stacking.

[0039] This embodiment presents an automatic lamination method for transformer cores: S1: Preparation before stacking: Place the five sets of transformer core silicon steel sheet stacks on the outer perimeter of loading platform 2 accordingly; S1.1: Adjust the stacking platform 3 to the highest position; make the height of the uppermost silicon steel sheet on the loading platform 2 level with the initial stacking height of the stacking platform 3; S2: Upper and lower yoke stacking: The cylinders 5006 on the two sets of upper and lower yoke transfer and stacking mechanisms 5 extend and push the suction cup 5003 to move downward. The suction cup 5003 picks up the silicon steel sheet. The cylinders 5006 retract and drive the suction cup 5003 and the silicon steel sheet to move upward. The silicon steel sheet is attached to the magnetic patch 5016 at the bottom of the patch plate 5008. S2.1: The centering positioning mechanism 5004 on the two sets of transfer and superposition mechanisms 5 of the upper and lower yokes centers the silicon steel sheet below the magnetic patch 5016, and the corresponding centering positioning mechanism 5004 is reset. S2.2: At the same time, the second bidirectional drive group 4003 drives the corresponding transfer and stacking mechanism 5 to move the upper and lower yoke silicon steel sheets that have been picked up to the middle and face each other above the stacking platform 3. S2.3: The corresponding cylinder 5006 extends and pushes the suction cup 5003 downward. The suction cup 5003 pushes the upper and lower yoke silicon steel sheets adsorbed under the magnetic patch 5016 downward to stack them. S2.4: The suction cup 5003 lowers the upper and lower yoke silicon steel sheets, the cylinder 5006 retracts, and the two sets of transfer and stacking mechanisms 5 are reset to the top of the silicon steel sheet stack, and the upper and lower yokes are stacked in one go. S3: Column stacking: The cylinder 5006 on the three sets of column transfer and stacking mechanisms 5 extends and pushes the suction cup 5003 to move downward. The suction cup 5003 picks up the silicon steel sheet. The cylinder 5006 retracts and drives the suction cup 5003 and the silicon steel sheet to move upward. The silicon steel sheet is attached to the magnetic patch 5016 at the bottom of the patch 5008. S3.1: The centering positioning mechanism 5004 on the three sets of column transfer and stacking mechanisms 5 centers the silicon steel sheet below the magnetic patch 5016, and the corresponding centering positioning mechanism 5004 is reset. S3.2: At the same time, the third bidirectional drive group 4004 drives the corresponding transfer and stacking mechanism 5 to move the silicon steel sheets from the two side columns towards the center and above the stacking platform 3; at the same time, the unidirectional drive group drives the corresponding transfer and stacking mechanism 5 to move the silicon steel sheet from the middle column towards the center and above the stacking platform 3. S3.3: The corresponding cylinder 5006 extends and pushes the suction cup 5003 downward. The suction cup 5003 pushes the three sets of column silicon steel sheets adsorbed under the magnetic patch 5016 downward to stack them. S3.4: The suction cup 5003 lowers the upper and lower yoke silicon steel sheets, the cylinder 5006 retracts, the three sets of transfer and stacking mechanisms 5 are reset to the top of the silicon steel sheet stack, and the three sets of columns are stacked in one go. S4: Dynamic adjustment: When cylinder 5006 retracts in step 3.4, the loading platform 2 moves upward and the stacking platform 3 moves downward, so that the uppermost silicon steel sheet is flush. S5: Repeat steps 2-4 to achieve continuous automatic stacking; S6: After the iron core laminations are completed, adjust the lamination platform 3 to the lowest position and use a forklift to remove the stacked iron cores from one side.

[0040] Traditional automatic laminating equipment uses the upper and lower yokes to perform lamination from one side, and three sets of columns to perform lamination from the other side. The movement distance is more than twice the lamination length of the largest column, which is generally around 1.8 meters. With the allowance for transition space, the minimum lamination movement distance is about 2 meters. Each lamination requires a movement of 2-3 meters, which is a large movement distance, takes a long time, and has low movement accuracy. In addition, the independent positioning process of silicon steel sheets (material picking → feeding → positioning) further increases the equipment space, and the equipment length is at least 5 meters.

[0041] The entire device is designed so that the silicon steel sheets to be stacked and the iron core sheets to be stacked are parallel to each other. The upper and lower yokes and the two side columns are all stacked from the nearest side in a bidirectional motion. The principle of proximity between the silicon steel sheet stacks and the iron core sheets significantly shortens the movement distance during the stacking process. The middle column has the largest stacking distance, which is about half the stacking length of the upper and lower yokes, generally around 0.9 meters. With the reserved transition space, it is generally around 1.1 meters, which shortens the distance by nearly half. The minimum stacking distance between the upper and lower yokes is the reserved transition space, which is about 0.2 meters, further reducing the stacking distance. The use of the nearest bidirectional drive stacking method significantly shortens the stacking distance, reduces the number of drive motors, reduces stacking time, lowers equipment costs, significantly improves stacking accuracy, and increases production efficiency.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic lamination device for transformer cores, characterized in that, include: outer frame; The loading platform, located in the middle of the outer frame, is used to support the stack of silicon steel sheets to be stacked and to adjust the loading height. An opening is provided in the middle of the loading platform; The lamination platform, located in the center of the opening, is used to place the iron core laminations; The suspension is fixedly installed inside the top of the outer frame. Two sets of first supports are provided below the suspension in the length direction and two sets of second supports are provided in the width direction. A transfer and stacking mechanism, located below the suspension, is used to adsorb the topmost silicon steel sheet from the silicon steel sheet stack lifting mechanism and transfer it to the stacking platform. The transfer and stacking mechanism includes a fixed frame, a movable frame, a suction cup, and a centering positioning mechanism. The movable frame is located directly below the fixed frame, and a guide assembly and a cylinder are provided between the movable frame and the fixed frame. The cylinder drives the movable frame to move up and down. Multiple fixed seats are provided below the movable frame, and the suction cup is fixedly mounted on the fixed seats. The first support has two sets of transfer and overlapping mechanisms below it for overlapping the upper and lower yokes of the iron core; the second support has three sets of transfer and overlapping mechanisms below it for overlapping the three columns of the iron core; the centering positioning mechanism is located on one side of the suction cup for positioning the silicon steel sheet on the suction cup.

2. The automatic lamination device for transformer cores according to claim 1, characterized in that: A feeding screw is provided on one side of the column of the outer frame, and a feeding sleeve is provided on the feeding screw. A feeding platform is provided inside the outer frame, and the feeding platform is fixedly installed on four feeding sleeves. A feeding motor and multiple gearboxes are fixedly installed on the top of the outer frame. The feeding motor, gearboxes and drive shaft drive the four feeding screws to rotate synchronously, and drive the feeding platform to move up and down through the four feeding sleeves.

3. The automatic lamination device for transformer cores according to claim 1, characterized in that: The stacking platform includes a stacking frame, a stacking lifting motor, and a stacking lifting frame. The stacking frame is located in the center of the opening. A stacking lifting guide rail is provided on the outer periphery of the stacking frame in the vertical direction. A stacking slider is provided on the stacking lifting frame, and the stacking slider and the stacking lifting guide rail are in sliding engagement. Stacking lifting screws are provided on both sides of the stacking frame in the vertical direction, and stacking lifting sleeves are provided on both sides of the stacking lifting frame, and the stacking lifting sleeves and stacking lifting screws are in engagement. The stacking lifting motor is located at the bottom of the stacking frame. The stacking lifting motor, gearbox, and drive shaft drive the stacking lifting screws on both sides to rotate, and drive the stacking lifting frame to move up and down through the stacking lifting sleeves.

4. The automatic lamination device for transformer cores according to claim 3, characterized in that: The stacking platform lifting frame has a first bidirectional drive group in the width direction in the middle. The first bidirectional drive group includes a bidirectional base, a bidirectional lead screw, and a bidirectional guide rail. Bidirectional bearing seats are provided at both ends of the lead screw, and the bidirectional bearing seats are fixedly mounted on the bidirectional base. A bidirectional motor is provided on the bidirectional lead screw to drive the lead screw to rotate. The threads on both sides of the middle of the bidirectional lead screw rotate in opposite directions, and bidirectional thread sleeves are provided on both sides of the middle of the bidirectional lead screw. A bidirectional slide block is fixedly mounted on the bidirectional thread sleeve. Bidirectional sliders are slidably engaged on both sides of the bidirectional guide rail. The bidirectional motor, bidirectional guide rail and bidirectional base of the first bidirectional drive group are fixedly mounted on the stacking platform lifting frame; an upper yoke support and a lower yoke support are respectively provided on both sides above the stacking platform lifting frame, and the bidirectional slide and bidirectional slider of the first bidirectional drive group are fixedly mounted at the bottom of the upper yoke support and the lower yoke support.

5. The automatic lamination device for transformer cores according to claim 4, characterized in that: The first bracket and the second bracket are respectively provided with a second bidirectional drive group and a third bidirectional drive group; the second bidirectional drive group and the third bidirectional drive group are perpendicular to each other, and the second bidirectional drive group and the first bidirectional drive group are parallel to each other. A central column drive group is arranged parallel to one side of the third bidirectional drive group. The central column drive group includes a one-way base, a one-way lead screw, and a one-way guide rail. One-way bearing seats are provided at both ends of the one-way lead screw. The one-way bearing seats are mounted on the one-way base. A one-way motor is provided at one end of the one-way lead screw to drive the one-way lead screw to rotate. A one-way sleeve is provided on the one-way lead screw, and a one-way slide block is provided on the one-way sleeve. A one-way slider is slidably fitted on the one-way guide rail. The bidirectional motors, bidirectional guide rails, and bidirectional bases of the second and third bidirectional drive groups are fixedly mounted on the suspension, and the bidirectional sliders and bidirectional slide blocks are correspondingly fixedly mounted on the top of the fixed frame on the four outer groups of transfer and stacking mechanisms. The unidirectional base, unidirectional motor, and unidirectional guide rail are fixedly mounted on the suspension; the unidirectional slider and unidirectional slide block are fixedly mounted on the movable frame of the intermediate transfer and stacking mechanism.

6. The automatic lamination device for transformer cores according to claim 5, characterized in that: The centering positioning mechanism includes a mounting plate and a fourth bidirectional drive group; support columns are provided on the upper sides of both sides of the mounting plate, and the other end of the support columns is fixedly mounted on a fixed frame; multiple strip-shaped holes are opened in the middle of the mounting plate, and the suction cup is located in the strip-shaped holes; a reinforcing seat is fixedly mounted on one side of the strip-shaped holes above the mounting plate; The first bidirectional drive group, the second bidirectional drive group, the third bidirectional drive group, and the fourth bidirectional drive group have the same working principle; The bidirectional motor, bidirectional guide rail, and bidirectional base of the fourth bidirectional drive group are fixedly mounted on the reinforcing seat, and a lever is fixedly mounted on the bidirectional slider and bidirectional slide block; a lever is fixedly mounted on one end of the lever; the lever is located inside the strip hole.

7. The automatic lamination device for transformer cores according to claim 6, characterized in that: A baffle is provided on the side of the plate away from the lever to limit the silicon steel sheet on one side.

8. The automatic lamination device for transformer cores according to claim 6, characterized in that: A magnetic patch is fixedly disposed on the lower surface of the plate for adsorbing silicon steel sheets; the lower surfaces of the paddle and the baffle are lower than the lower surface of the magnetic patch.

9. A method for automatic lamination of transformer cores, characterized in that, The core lamination process is as follows: S1: Preparation before stacking: Place the five sets of transformer core silicon steel sheet stacks on the outer perimeter of the loading platform accordingly; S1.1: Adjust the stacking platform to the highest position; make the height of the top silicon steel sheet on the loading platform level with the initial stacking height of the stacking platform; S2: Upper and lower yoke stacking: The cylinders on the two sets of upper and lower yoke transfer and stacking mechanisms extend and push the suction cup to move downward. The suction cup picks up the silicon steel sheet. The cylinder retracts and drives the suction cup and silicon steel sheet to move upward. The silicon steel sheet is attached to the magnetic patch at the bottom of the patch. S2.1: The centering positioning mechanism on the two sets of transfer and superimposition mechanisms of the upper and lower yokes centers the silicon steel sheet below the magnetic patch, and the corresponding centering positioning mechanism is reset; S2.2: At the same time, the second bidirectional drive group drives the corresponding transfer and stacking mechanism to move the upper and lower yoke silicon steel sheets that have been picked up to the middle and opposite sides to the stacking platform. S2.3: The corresponding cylinder extends and pushes the suction cup downward. The suction cup pushes the upper and lower yoke silicon steel sheets attached to the magnetic patch downward for stacking. S2.4: The suction cup lowers the upper and lower yoke silicon steel sheets, the cylinder retracts, and the two sets of transfer and stacking mechanisms are reset to above the silicon steel sheet stack, completing the stacking of the upper and lower yokes in one operation. S3: Column stacking: The cylinders on the three sets of column transfer and stacking mechanisms extend and push the suction cups downward. The suction cups pick up the silicon steel sheets, the cylinders retract, and the suction cups and silicon steel sheets move upward. The silicon steel sheets are attached to the magnetic stickers at the bottom of the mounting plate. S3.1: The centering positioning mechanism on the three sets of column transfer and stacking mechanisms centers the silicon steel sheet below the magnetic patch, and the corresponding centering positioning mechanism is reset; S3.2: At the same time, the third bidirectional drive group drives the corresponding transfer and stacking mechanism to move the silicon steel sheets from the two side columns towards the center and above the stacking platform; at the same time, the unidirectional drive group drives the corresponding transfer and stacking mechanism to move the silicon steel sheet from the middle column towards the center and above the stacking platform. S3.3: The corresponding cylinder extends and pushes the suction cup downward. The suction cup pushes the three sets of column silicon steel sheets attached to the magnetic patch downward to stack them. S3.4: The suction cup lowers the upper and lower yoke silicon steel sheets, the cylinder retracts, the three sets of transfer and stacking mechanisms are reset to the top of the silicon steel sheet stack, and the three sets of columns complete the stacking in one go. S4: Dynamic adjustment: When the cylinder retracts in step 3.4, the loading platform moves up and the stacking platform moves down to make the top silicon steel sheet flush. S5: Repeat steps 2-4 to achieve continuous automatic stacking; S6: After the iron core laminations are completed, adjust the lamination platform to the lowest position and use a forklift to remove the stacked iron cores from one side.

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