Non-porous silicon steel sheet stacking device and stacking method

Abstract

The invention discloses a holeless silicon steel sheet stacking device and a stacking method, and belongs to the technical field of electrical equipment iron core manufacturing. In order to solve the problem that existing holeless silicon steel sheets are difficult to position and easy to slip during stacking, the device comprises a lifting table unit, a first limiting unit, a second limiting unit, a silicon steel sheet preparation table, a laser alignment unit and an intelligent control unit. The first limiting unit and the second limiting unit are located on the left rear side and the right side of the stacking table correspondingly, and lateral first electromagnets and lateral second electromagnets are arranged on the inner sides of the first limiting unit and the second limiting unit. By means of the mode of only dynamically and laterally adsorbing and fixing the topmost silicon steel sheet, high-precision mechanical positioning is provided, meanwhile, sliding interference in the stacking process is thoroughly eliminated, the structure is simple and reliable, the automation degree is high, and the device is suitable for efficient and high-precision non-porous silicon steel sheet dislocation stacking.

Description

Technical Field

[0001] This invention relates to the field of electrical equipment manufacturing technology, specifically to a silicon steel sheet stacking technology for manufacturing iron cores of transformers, motors, etc., and in particular to a non-perforated silicon steel sheet stacking device and stacking method that does not require positioning holes in the silicon steel sheets. Background Technology

[0002] In the manufacturing process of iron cores for electrical equipment such as transformers and motors, a large number of stamped silicon steel sheets are typically stacked in a specific manner to form a complete iron core. To ensure the electromagnetic performance of the iron core and reduce eddy current losses, adjacent silicon steel sheets are usually staggered (for example, using a stepped stacking) to block eddy current paths.

[0003] In traditional silicon steel sheet stacking processes, to precisely position each silicon steel sheet and prevent it from sliding or misaligning during stacking, positioning holes are typically punched at specific locations on the silicon steel sheets (such as the four corners or the center). During stacking, positioning holes on the silicon steel sheets are inserted into positioning pins (or positioning posts) fixed to the worktable, thereby achieving rapid positioning and fixation. While this "hole-based stacking" method is simple to operate and provides reliable positioning, it also brings significant drawbacks:

[0004] Impacts on material properties and core quality: The positioning holes disrupt the continuity of magnetic domains within the silicon steel sheet, leading to additional hysteresis and eddy current losses, thus reducing the overall efficiency of the core. Simultaneously, the burrs and stress concentration areas generated by punching can become noise sources and potential failure points during core operation.

[0005] Increased material and production costs: The punching process increases additional mold costs and processing energy consumption. At the same time, the scrap around the holes becomes waste, reducing material utilization.

[0006] It limits design flexibility: the fixed position of the positioning holes restricts the design optimization space for the shape and stacking method of the silicon steel sheets.

[0007] To address these issues, "poreless silicon steel sheet" stacking technology emerged. However, poreless silicon steel sheet stacking faces two major challenges:

[0008] Positioning Challenge: Due to the lack of a positioning hole as a physical reference, it is difficult to quickly and accurately determine the correct position of each silicon steel sheet on the horizontal plane (especially the relative position when stacked in a misaligned manner).

[0009] Anti-slipping challenge: During the stacking process, especially when placing and adjusting the upper silicon steel sheets, the lower silicon steel sheets, already in place, are highly susceptible to slippage due to friction. This leads to increased cumulative errors, ultimately causing the entire core stack to deviate from the design dimensions, affecting assembly accuracy and electromagnetic performance. In particular, during misaligned stacking, the edges of the lower silicon steel sheets are suspended without the upper silicon steel sheets pressing them down, making them more prone to slippage under lateral forces.

[0010] Existing technologies have attempted to address the issue of stacking non-porous silicon steel sheets, such as using liftable lateral clamping mechanisms. However, these mechanisms are typically complex, requiring independent clamping units for each layer or every few layers, resulting in high costs and cumbersome control. Other solutions employ integral lateral baffles for positioning, but these fail to address the frictional interference between the upper and lower layers during placement, easily causing the lower layers to be "pushed away." Vacuum adsorption platforms or integral pressure plates are ill-suited to the constantly changing edge positions of layers during misaligned stacking. Therefore, there is an urgent need to develop a stacking solution that can provide precise positioning while dynamically fixing only the topmost easily sliding silicon steel sheet, and possesses a simple and reliable structure. Summary of the Invention

[0011] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a non-porous silicon steel sheet stacking device and method. This device innovatively combines mechanical positioning references with selective lateral electromagnetic adsorption, dynamically adsorbing and fixing only the top layer of the stacked silicon steel sheet. While ensuring its precise positioning, it effectively isolates the influence of upper layer operations on lower layers, completely solving the slippage problem during misaligned stacking of non-porous silicon steel sheets. This invention features an ingenious structure, a high degree of automation, and is suitable for high-efficiency, high-precision non-porous silicon steel sheet stacking operations.

[0012] To achieve the aforementioned technical objective, the technical solution adopted by the present invention is as follows:

[0013] A non-porous silicon steel sheet stacking device includes: a lifting platform unit, a first limiting unit, a second limiting unit, a silicon steel sheet preparation table, a laser alignment unit, and an intelligent control unit.

[0014] The lifting platform unit includes a stacking platform, a base, a lifting screw motor, and a guide rod. The drive rod of the lifting screw motor is connected to the stacking platform to drive it to lift. The guide rod is connected between the stacking platform and the base to keep the stacking platform horizontal.

[0015] The first limiting unit has an L-shaped horizontal cross section and is set on the left and rear sides of the stacking platform. Multiple first electromagnets with the same thickness as a single layer of silicon steel sheet are provided at its upper end along the horizontal direction.

[0016] The second limiting unit is located on the right side of the stacking platform. Multiple second electromagnets with the same thickness as the single layer of silicon steel sheet are provided at the upper end of the unit in the horizontal direction. The second electromagnets are at the same height as the first electromagnets. The rear end of the second limiting unit is provided with a left-bending angle.

[0017] The silicon steel sheet preparation table is located in front of the stacking table;

[0018] A laser alignment unit is positioned above the stacking stage to identify marking points on the silicon steel sheets;

[0019] The intelligent control unit is connected to the lifting screw motor, the first electromagnet, the second electromagnet, and the laser alignment unit, respectively.

[0020] To optimize the technical solution, further measures include:

[0021] There are four guide rods, with their upper ends fixedly connected to the stacking platform and their lower ends passing through the base.

[0022] Both the first and second electromagnets are single-layer structures in the vertical direction, and are used to attract the top layer of silicon steel sheets on the stacking platform when silicon steel sheets are stacked.

[0023] The laser alignment unit includes several laser emitters and laser receivers. The laser emitters emit lasers vertically downwards, and the laser receivers receive reflected signals. When the laser irradiation position is aligned with the marking point on the silicon steel sheet, the laser receiver generates an identification signal that is different from the signal when irradiating other positions.

[0024] The upper surface of the stacking platform has several slots for the binding straps to pass through.

[0025] When silicon steel sheets are stacked on a stacking platform, adjacent silicon steel sheets are designated as the first silicon steel sheet and the second silicon steel sheet. The first silicon steel sheet and the second silicon steel sheet are staggered in the front-back direction and the left-right direction, and the first silicon steel sheets are aligned vertically, and the second silicon steel sheets are aligned vertically.

[0026] A method for stacking non-porous silicon steel sheets includes the following steps:

[0027] S1: Control the lifting platform unit to position the upper surface of the stacking platform at an initial position that is one silicon steel sheet thickness lower than the upper surface of the first electromagnet.

[0028] S2: Place the first silicon steel sheet on the stacking platform, with its left rear corner abutting against the L-shaped corner of the first limiting unit, and its left and rear sides abutting against the two sides of the first limiting unit respectively; after the laser alignment unit detects the marking point of the first silicon steel sheet, the intelligent control unit controls the first electromagnet to be energized to attract the first silicon steel sheet.

[0029] S3: Place the second silicon steel sheet on the first silicon steel sheet of the stacking platform, slide the second silicon steel sheet so that its right side abuts against the second limiting unit and its right rear corner abuts against the corner; after the laser alignment unit detects the mark point of the second silicon steel sheet, the intelligent control unit controls the first electromagnet to de-energize, and then controls the lifting platform unit to lower the stacking platform by the thickness of one silicon steel sheet, and then controls the second electromagnet to be energized to attract the second silicon steel sheet;

[0030] S4: Repeat steps S2 and S3, alternately stacking the first silicon steel sheet and the second silicon steel sheet until the predetermined number of stacks is reached;

[0031] S5: Control the lifting platform unit to raise the stacked silicon steel sheet stack to a position above the first and second limit units, and then pack and fix it.

[0032] In step S2, the first silicon steel sheet is slid from the silicon steel sheet preparation table to the stacking table by a worker; in step S, the second silicon steel sheet is slid from the silicon steel sheet preparation table to the stacking table by a worker.

[0033] In step S3, the operation of de-energizing the first electromagnet and lowering the stacking platform driven by the lifting platform unit is sequentially controlled and executed by the intelligent control unit.

[0034] In step S5, the packaging and securing are achieved by passing the binding straps through the binding strap slots on the stacking platform and bundling the silicon steel sheet stack.

[0035] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0036] 1. This invention proposes the principle of "dynamic lateral adsorption fixation": abandoning the traditional approach of fixing from above or below, or clamping the entire structure laterally, it creatively fixes only the topmost and most slippery single silicon steel sheet in the stack with lateral electromagnetic adsorption. When placing and adjusting the upper silicon steel sheet, the lower silicon steel sheet is firmly "locked" to the reference surface by the lateral magnetic force. Any friction or lateral force from the upper layer cannot move it, thus fundamentally eliminating the source of slippage accumulation error.

[0037] 2. The first and second limiting units of the present invention provide high-precision mechanical hard references for positioning. The electromagnet is energized at the moment the silicon steel sheet is close to the reference, "pulling" it on the reference surface, realizing instant and gapless fixation after positioning. The positioning accuracy depends on the machining accuracy and laser alignment accuracy, which can reach ±0.05mm or more.

[0038] 3. The invention features an extremely simple and reliable structure with significant cost advantages: the core fixing component is merely an electromagnet embedded in the limiting block, eliminating the need for complex lifting grippers, multi-link mechanisms, or vacuum systems. The device boasts high overall rigidity, a low failure rate, and manufacturing and maintenance costs far lower than similar automated stacking equipment.

[0039] 4. This invention achieves automatic cycling of "alignment equals adsorption, layer change equals switching" through laser alignment and intelligent control. By adjusting the position of the limiting unit and program parameters, it can quickly adapt to the stacking of silicon steel sheets of different sizes and misalignment amounts, making production changeover adjustments convenient.

[0040] 5. The electromagnet is only energized for a short period of time when a single silicon steel sheet needs to be fixed, resulting in extremely low energy consumption. It has no hydraulic system, low noise, and is clean and environmentally friendly.

[0041] 6. Perfectly compatible with the advantages of non-porous silicon steel sheets: The entire process does not rely on the holes in the silicon steel sheets, thus preserving the integrity of the material's electromagnetic properties and helping to manufacture more efficient and lower-loss electrical equipment cores. Attached Figure Description

[0042] Figure 1 This is a top view of the non-porous silicon steel sheet stacking device of the present invention before the silicon steel sheets are stacked;

[0043] Figure 2 for Figure 1 AA section view;

[0044] Figure 3 This is a top view of the non-porous silicon steel sheet stacking device of the present invention after stacking silicon steel sheets;

[0045] Figure 4 for Figure 3 BB cross-sectional view;

[0046] Figure 5 for Figure 4 Enlarged view of part C;

[0047] Figure 6 for Figure 4 The D-section view.

[0048] In the diagram: 1. Lifting platform unit; 11. Stacking platform; 12. Base; 13. Lifting screw motor; 14. Guide rod; 15. Binding strap through slot; 2. First limiting unit; 21. First electromagnet; 3. Second limiting unit; 31. Second electromagnet; 32. Folding angle; 4. Silicon steel sheet preparation table; 5. Laser alignment unit; 61. First silicon steel sheet; 62. Second silicon steel sheet; 63. Marking point. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of this application clearer, the application is described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0050] Obviously, the accompanying drawings described below are merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar scenarios based on these drawings without any inventive effort. Furthermore, it is understood that although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, any changes to design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as insufficient disclosure of the content of this application.

[0051] like Figure 1-2 As shown, a non-porous silicon steel sheet stacking device includes: a lifting platform unit 1, a first limiting unit 2, a second limiting unit 3, a silicon steel sheet preparation platform 4, a laser alignment unit 5, and an intelligent control unit.

[0052] The lifting platform unit 1 is the core of the device for support and lifting, including a stacking platform 11, a base 12, a lifting screw motor 13, and guide rods 14. The base 12 is securely fixed to the ground or equipment base using anchor bolts or other methods. The lifting screw motor 13 is preferably a precision ball screw module driven by a servo motor, fixedly installed on or near the base 12, with its screw nut or drive rod end rigidly connected to the center of the lower surface of the stacking platform 11 or a stress point. Four guide rods 14 are provided, distributed at the four corners of the stacking platform 11. Their upper ends are fixedly connected to the stacking platform 11, and their lower ends slide through pre-set guide holes on the base 12. The sliding pair formed by the guide rods 14 and the guide holes ensures that the stacking platform 11 maintains a high level of horizontality and linearity during vertical movement driven by the lifting screw motor 13, preventing tilting. This is fundamental to ensuring the flatness of the silicon steel sheet stack.

[0053] The first limiting unit 2 is one of the key innovative components of this invention. It has a rigid overall structure with an L-shaped horizontal cross-section. This first limiting unit 2 is fixedly installed on the left and rear sides of the stacking platform 11. The inner side of its L-shape, i.e., the side facing the center of the stacking platform 11, forms a precision-machined, mutually perpendicular right-angle positioning reference surface. This reference surface is used to limit the first silicon steel sheet 61 in two directions. At the upper end of the first limiting unit 2, along the inner edges of the two sides of its L-shape, several first electromagnets 21 are horizontally arranged. These first electromagnets 21 are not placed upwards, but rather their magnetic adsorption surfaces face the center of the stacking platform 11, i.e., facing the left and rear respectively. The thickness of each first electromagnet 21 is precisely designed to be the same as the nominal thickness of a silicon steel sheet to be stacked. When it is necessary to fix the "first silicon steel sheet 61" located on the top layer of the stack, the intelligent control unit controls the first electromagnet 21 corresponding to the height layer of the silicon steel sheet to be energized. After being energized, the electromagnet applies a strong magnetic force to the left and / or rear sides of the silicon steel sheet, firmly "pulling" it into place on the L-shaped right-angle reference surface of the first limiting unit 2, achieving a combination of positioning and fixing. As for other silicon steel sheets already stacked below, since their sides are not at the same height as the currently energized electromagnet, they will not be attracted, thus avoiding unnecessary magnetic interference and energy waste.

[0054] The second limiting unit 3 is another key innovative component of this invention. Its main body is a long, rigid strip structure, fixedly mounted on the right side of the stacking platform 11. At the upper end of the second limiting unit 3, along its inner edge in the length direction, i.e., facing the stacking platform 11, several second electromagnets 31 are horizontally arranged. The arrangement and thickness design of the second electromagnets 31 are exactly the same as those of the first electromagnet 21. The adsorption surface of the second electromagnets 31 also faces the center of the stacking platform 11. Furthermore, the rear end of the second limiting unit 3 has a left-bending angle 32. The inner side of this angle 32, together with the right side of the main body of the second limiting unit 3, forms a reference surface for positioning the "second silicon steel sheet 62". The function of the second electromagnet 31 is symmetrical to that of the first electromagnet 21: after being energized, it adsorbs and fixes the "second silicon steel sheet 62" located on the top layer of the stack from the right side, making it closely adhere to the right reference surface and the rear angle 32 reference surface. An important design feature is that the upper surfaces of all second electromagnets 31 and all first electromagnets 21 are precisely adjusted to the same horizontal height during installation. This ensures that during stacking, whether adsorbing the first silicon steel sheet 61 or the second silicon steel sheet 62, the electromagnet's operating height reference is consistent and coordinated with the lifting control of the lifting platform.

[0055] The silicon steel sheet preparation table 4 is located in front of the stacking table 11, and its surface is usually slightly lower than or flush with the surface of the stacking table 11 in its initial position. It is used to place the silicon steel sheet blanks to be stacked, making them easy for operators to access. Workers can easily slide the silicon steel sheets forward from the preparation table onto the stacking table 11.

[0056] The laser alignment unit 5 is the precise positioning sensing component of this invention. It is fixedly mounted on the roof, beam, or independent rack above the stacking platform 11 via a bracket. The laser alignment unit 5 includes at least four or eight sets of laser emitting and receiving devices (corresponding to two or four marking points on the silicon steel sheet). The laser emitter in each device is precisely calibrated to emit a fine laser beam vertically downwards. The preset projection point of the laser beam completely coincides with the position of a specific marking point 63 on the surface of the silicon steel sheet when it is theoretically correctly placed on the limiting reference surface. The marking point 63 is made at a specific corner of the silicon steel sheet. The marking point 63 has optical properties significantly different from the silicon steel sheet substrate (usually a bright, specularly reflective cold-rolled steel sheet). For example, it can be a sprayed matte white paint dot, an adhered diffuse reflection film, or a stamped micro-dimple. When the laser beam irradiates the surface of a normal silicon steel sheet, the light undergoes specular reflection, and the light signal returning to the receiver above is very weak; when the laser beam precisely irradiates the diffuse reflection marking point 63, a large amount of scattered light returns to the receiver, and the signal is significantly enhanced. The laser receiver converts this change in light intensity into a change in electrical signal. Therefore, when the laser receiver detects a signal of a specific intensity, it indicates that the mark 63 on the silicon steel sheet has aligned with the laser beam, meaning the silicon steel sheet has moved to the theoretically correct position. This "alignment signal" is the key condition for triggering the subsequent electromagnet attraction action.

[0057] The intelligent control unit is the brain of the device, typically employing a programmable logic controller (PLC) or an industrial computer. It is connected via cables or an industrial network to the servo driver of the lifting screw motor 13, the power supply control circuits of the first electromagnet 21 and the second electromagnet 31, and the signal output terminal of the laser alignment unit 5. The intelligent control unit contains a pre-installed stacking control program that logically and sequentially controls the on / off state of the electromagnets and the lifting platform's movement based on signals fed back from the laser alignment unit 5, achieving semi-automatic or fully automatic cyclic stacking processes.

[0058] The upper surface of the stacking platform 11 has several through slots 15 of a certain depth or through which binding straps are inserted along its width or length. These slots are used to easily insert steel straps, polyester strapping, or other binding straps after the stacking is completed, so as to bind the loose stack as a whole for safe lifting.

[0059] like Figure 3-6 As shown, the present invention provides a method for stacking non-porous silicon steel sheets, applied to the aforementioned non-porous silicon steel sheet stacking apparatus, comprising the following steps:

[0060] S1: System initialization and parameter setting.

[0061] Power on the device and the intelligent control unit performs a system self-test. The operator sets the total number (N) of silicon steel sheets to be stacked and the nominal thickness (t) of the silicon steel sheets via the human-machine interface. A stack of "first silicon steel sheets 61" and a stack of "second silicon steel sheets 62" (both identical in shape but distinguished by marking point 63 or the order of retrieval) are placed on the silicon steel sheet preparation table 4. The intelligent control unit controls the lifting screw motor 13 to move the upper surface of the stacking table 11 to a precise initial height position (H0). H0 satisfies the following condition: H0 = H_ref - t. Where H_ref is the reference horizontal plane height of the adsorption surfaces of the first electromagnet 21 and the second electromagnet 31. That is, the initial table surface of the stacking table 11 is lower than the electromagnet adsorption surface by the thickness of one silicon steel sheet. At this point, if the first silicon steel sheet is placed, its top surface will be approximately flush with the electromagnet adsorption surface.

[0062] S2: Precise positioning and lateral adsorption fixation of the first silicon steel sheet 61.

[0063] The operator takes a first silicon steel sheet 61 from the preparation table and smoothly slides it to the center area of ​​the stacking platform 11. Then, by hand or with a tool, the operator pushes the silicon steel sheet towards the rear left corner of the stacking platform 11 until its left side is tightly against the left vertical reference plane of the first limiting unit 2, and its rear side is tightly against the rear vertical reference plane of the first limiting unit 2, with its rear left corner naturally embedded in the L-shaped bend 32. At this point, the two degrees of freedom of the first silicon steel sheet 61 on the horizontal plane are completely constrained by mechanical limits, reaching the theoretically designed position.

[0064] Almost simultaneously with the silicon steel sheets coming together, the laser beam emitted by the laser emitter corresponding to the first silicon steel sheet 61 in the laser alignment unit 5 suspended above illuminates the mark point 63 in the left rear corner area of ​​the silicon steel sheet. Due to the diffuse reflection effect of the mark point 63, the laser receiver receives a strong signal and immediately sends a "first silicon steel sheet 61 aligned" signal to the intelligent control unit.

[0065] Upon receiving the signal, the intelligent control unit issues a control command to energize the first electromagnet 21. The energized electromagnet generates a strong lateral magnetic force, firmly adhering the left side and / or rear side of the first silicon steel sheet 61 to the reference surface of the first limiting unit 2. At this point, the silicon steel sheet is not only precisely positioned but also firmly fixed laterally, preventing it from moving horizontally. Only this one silicon steel sheet remains on the stacking platform 11; it is the "top layer" silicon steel sheet.

[0066] S3: With the first silicon steel sheet 61 laterally adsorbed and fixed, the operator takes a second silicon steel sheet 62 and places it on the stacking platform 11, above the first silicon steel sheet 61. Since the first silicon steel sheet 61 is fixed, the placement action itself will not cause it to move. Next, the second silicon steel sheet 62 is slid so that its right side is tightly attached to the right vertical reference surface of the second limiting unit 3, while its right rear corner abuts against the reference surface of the bend 32 at the rear end of the second limiting unit 3. In this way, the second silicon steel sheet 62 also reaches its theoretically designed position through mechanical limiting. It should be emphasized that, due to the staggered stacking design, the rear edge and left edge of this second silicon steel sheet 62 are not aligned with the lower layer of second silicon steel sheet 62, and part of its area is suspended above the lower layer sheet.

[0067] When the second silicon steel sheet 62 comes close to its positioning reference, the corresponding laser alignment unit 5 detects its right rear corner mark 63 and sends a "second silicon steel sheet 62 aligned" signal to the intelligent control unit.

[0068] Upon receiving this signal, the intelligent control unit executes the following core operations in a preset logical sequence:

[0069] a) Releasing the pre-layer fixation: First, immediately cut off the current supply to the first electromagnet 21 (corresponding to the first silicon steel sheet 61). The first electromagnet 21 loses its magnetism, and the lateral attraction force on the first silicon steel sheet 61 disappears. At this time, the first silicon steel sheet 61 maintains its position solely by the friction between itself and the lower layer (the surface of the stacking platform 11) and any possible slight interlocking force. The key point is that since the first silicon steel sheet 61 is no longer the "top layer" and is about to be partially covered and pressed by the upper layer, the risk of its own slippage is greatly reduced.

[0070] b) Table Descending: Next, the intelligent control unit drives the lifting screw motor 13 to precisely lower the stacking table 11 by a distance (Δh = t), which is the thickness of one silicon steel sheet. The stacking table 11 drives all the silicon steel sheets already stacked on it to descend synchronously. After descending, the height of the second silicon steel sheet 62, which was originally on the top layer, is reduced by t. More importantly, its side is now aligned with the adsorption surface height layer of the second electromagnet 31. The first silicon steel sheet 61, which was previously released, descends to a lower height, and its side is now away from the current working surface of the first electromagnet 21.

[0071] c) Securing the current top layer: After the stacking platform 11 descends into position, the intelligent control unit energizes the second electromagnet 31. The energized second electromagnet 31 generates a lateral magnetic attraction force, firmly adhering the right side of the second silicon steel sheet 62 to the reference surface of the second limiting unit 3. Thus, the second silicon steel sheet 62 becomes the new "top layer" silicon steel sheet that is firmly fixed laterally.

[0072] S4: Alternate stacking in a cyclical manner.

[0073] After completing step S3, the stacking state is as follows: the bottom is the first silicon steel sheet 61 that has been released and fixed, and the top is the second silicon steel sheet 62 that has been laterally adsorbed and fixed. The height of the stacking stage 11 is H0-t.

[0074] The next cycle begins, and the operator takes another first silicon steel sheet 61 and places it on top of the fixed second silicon steel sheet 62. The operator then presses its left rear corner against the first limiting unit 2. At this point, because the stacking platform 11 has descended, the left rear corner of this new first silicon steel sheet 61 will be vertically aligned with the left rear corner of the first first silicon steel sheet 61 (because each first silicon steel sheet 61 uses the same positioning reference). The laser alignment unit 5 detects the alignment signal.

[0075] After receiving the signal, the intelligent control unit executes the following: ① disconnecting the power supply of the second electromagnet 31 that is currently fixing the second silicon steel sheet 62; ② driving the stacking platform 11 to descend another distance t; ③ energizing the first electromagnet 21 at the corresponding height to attract and fix the new first silicon steel sheet 61.

[0076] Thus, steps S2 and S3 are performed alternately in a cyclical manner. Each complete "placement-positioning-adsorption" cycle only applies lateral electromagnetic adsorption to the currently topmost, most susceptible silicon steel sheet. Once it is covered by a new silicon steel sheet, the fixation is released, and the fixing effect is transferred to the new top silicon steel sheet. This "dynamic relay" fixing strategy ensures, in the most economical and efficient way, that a "slip lock" is always in operation throughout the stacking process, isolating operational interference. Ultimately, the first silicon steel sheets 61 are vertically aligned, and the second silicon steel sheets 62 are vertically aligned, forming a stable staggered stack.

[0077] S5: Layering completed and overall binding.

[0078] The internal counter of the intelligent control unit accumulates the number of cycles. When the total number of stacked sheets reaches the preset value N, stacking is complete. At this time, all electromagnets are de-energized, and the intelligent control unit controls the lifting screw motor 13 to lift the entire stacking platform 11, along with the silicon steel sheet stacks on it, upwards. The lifting height must ensure that the bottom of the stack is completely higher than the upper edge of the first limiting unit 2 and the second limiting unit 3, in order to perform the bundling operation.

[0079] The operator introduces the binding straps from the bottom of the binding strap slot 15 on the stacking platform 11, around the entire silicon steel sheet stack, and then leads them out from the slot on the other side. A tensioner is used to tighten and lock the straps, completing the overall packaging of the stack. After packaging, the silicon steel sheet stack becomes a rigid, integral unit.

[0080] The embodiments described are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the embodiments described. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A non-porous silicon steel sheet stacking device, characterized in that, include: The system includes a lifting platform unit (1), a first limiting unit (2), a second limiting unit (3), a silicon steel sheet preparation table (4), a laser alignment unit (5), and an intelligent control unit. The lifting platform unit (1) includes a stacking platform (11), a base (12), a lifting screw motor (13), and a guide rod (14). The drive rod of the lifting screw motor (13) is connected to the stacking platform (11) to drive it to lift. The guide rod (14) is connected between the stacking platform (11) and the base (12) to keep the stacking platform (11) horizontal. The first limiting unit (2) has an L-shaped horizontal cross section and is set on the left and rear sides of the stacking platform (11). Its upper end is provided with multiple first electromagnets (21) with the same thickness as the single layer of silicon steel sheet along the horizontal direction. The second limiting unit (3) is located on the right side of the stacking platform (11). Multiple second electromagnets (31) with the same thickness as the single layer of silicon steel sheet are provided at its upper end along the horizontal direction. The second electromagnets (31) are at the same height as the first electromagnet (21). The rear end of the second limiting unit (3) is provided with a left-bending angle (32). The silicon steel sheet preparation table (4) is located in front of the stacking table (11); The laser alignment unit (5) is positioned above the stacking stage (11) to identify the marking points (63) on the silicon steel sheet. The intelligent control unit is connected to the lifting screw motor (13), the first electromagnet (21), the second electromagnet (31) and the laser alignment unit (5) respectively.

2. The non-porous silicon steel sheet stacking device according to claim 1, characterized in that, The number of guide rods (14) is four, with their upper ends fixedly connected to the stacking platform (11) and their lower ends passing through the base (12).

3. The non-porous silicon steel sheet stacking device according to claim 1, characterized in that, The first electromagnet (21) and the second electromagnet (31) are both single-layer structures in the vertical direction. When silicon steel sheets are stacked, they are used to attract the uppermost silicon steel sheet on the stacking platform (11).

4. The non-porous silicon steel sheet stacking device according to claim 3, characterized in that, The laser alignment unit (5) includes several laser emitters and laser receivers. The laser emitters emit lasers vertically downwards, and the laser receivers receive reflected signals. When the laser irradiation position is aligned with the mark point (63) on the silicon steel sheet, the laser receiver generates an identification signal that is different from the signal when irradiating other positions.

5. The non-porous silicon steel sheet stacking device according to claim 4, characterized in that, The upper surface of the stacking platform (11) is provided with several binding strap through slots (15) for binding straps to pass through.

6. The non-porous silicon steel sheet stacking device according to claim 5, characterized in that, When silicon steel sheets are stacked on the stacking platform (11), adjacent silicon steel sheets are referred to as first silicon steel sheet (61) and second silicon steel sheet (62). The first silicon steel sheet (61) and the second silicon steel sheet (62) are staggered in the front-back direction and the left-right direction, and each first silicon steel sheet (61) is aligned vertically and each second silicon steel sheet (62) is aligned vertically.

7. A method for stacking non-porous silicon steel sheets using the apparatus as described in claim 6, characterized in that, Includes the following steps: S1: Control the lifting platform unit (1) to position the upper surface of the stacking platform (11) at an initial position that is one silicon steel sheet thickness lower than the upper surface of the first electromagnet (21); S2: Place the first silicon steel sheet (61) on the stacking platform (11) so that its left rear corner abuts against the L-shaped corner of the first limiting unit (2), and its left and rear sides abut against the two sides of the first limiting unit (2) respectively; after the laser alignment unit (5) detects the mark point (63) of the first silicon steel sheet (61), the intelligent control unit controls the first electromagnet (21) to be energized to attract the first silicon steel sheet (61). S3: Place the second silicon steel sheet (62) on the first silicon steel sheet (61) of the stacking platform (11), slide the second silicon steel sheet (62) so that its right side abuts against the second limiting unit (3) and its right rear corner abuts against the bend (32); after the laser alignment unit (5) detects the mark point (63) of the second silicon steel sheet (62), the intelligent control unit controls the first electromagnet (21) to be de-energized, and then controls the lifting platform unit (1) to lower the stacking platform (11) by the thickness of one silicon steel sheet, and then controls the second electromagnet (31) to be energized to attract the second silicon steel sheet (62). S4: Repeat steps S2 and S3, alternately stacking the first silicon steel sheet (61) and the second silicon steel sheet (62) until the predetermined number of stacks is reached; S5: Control the lifting platform unit (1) to lift the stacked silicon steel sheet stack to a position above the first limit unit (2) and the second limit unit (3), and then pack and fix it.

8. The method for stacking non-porous silicon steel sheets according to claim 7, characterized in that, In step S2, the first silicon steel sheet (61) is slid from the silicon steel sheet preparation table (4) to the stacking table (11) by a worker; in step S3, the second silicon steel sheet (62) is slid from the silicon steel sheet preparation table (4) to the stacking table (11) by a worker.

9. The method for stacking non-porous silicon steel sheets according to claim 7, characterized in that, In step S3, the operation of de-energizing the first electromagnet (21) and lowering the stacking platform (11) driven by the lifting platform unit (1) is sequentially controlled and executed by the intelligent control unit.

10. The method for stacking non-porous silicon steel sheets according to claim 7, characterized in that, In step S5, the packaging and securing is achieved by passing the binding straps through the binding strap slots (15) on the stacking platform (11) and binding the silicon steel sheet stack.

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