A laser marking device for double-sided silicon steel sheet

Abstract

The utility model discloses a kind of double-sided silicon steel sheet laser marking device. The device includes device shell, and guiding structure is provided in shell, upper laser marking structure and lower laser marking structure. Upper laser marking structure and lower laser marking structure respectively include upper laser and lower laser located above and below silicon steel sheet, and both keep horizontal staggered arrangement in the conveying direction of silicon steel sheet, effectively avoid the stress superposition problem when double-sided marking. The device is also provided with wind blade structure and negative pressure structure, wind blade structure forms protective gas curtain at laser processing point, negative pressure structure generates suction airflow, and both cooperate to form blowing and sucking composite system, which can effectively remove smoke and dust and splashes generated during processing, protect optical lens and ensure processing quality. The utility model solves the stress concentration and lens pollution problem in double-sided laser marking, and is especially suitable for double-sided laser marking processing of high-quality silicon steel sheet.

Description

Technical Field

[0001] This utility model relates to the field of silicon steel sheet processing technology, specifically to a processing device for simultaneously performing laser marking on the upper and lower surfaces of silicon steel sheets to refine magnetic domains and reduce iron loss. Background Technology

[0002] Grain-oriented silicon steel is a key material for manufacturing transformer cores, and its performance directly affects the transformer's energy efficiency. Laser marking technology creates fine markings on the surface of silicon steel sheets, refining their internal magnetic domain structure and significantly reducing iron losses. Currently, most mainstream laser marking equipment performs single-sided processing, resulting in low efficiency. Simply using two sets of lasers for simultaneous double-sided marking leads to the superposition of thermal and residual stresses generated by the lasers, potentially causing deformation of the silicon steel sheet, decreased mechanical properties, or even breakage. Furthermore, metal spatter and fumes generated during laser processing contaminate optical lenses, affecting processing quality and equipment lifespan. Therefore, there is an urgent need for a high-efficiency, high-quality, and highly stable double-sided laser marking device that effectively solves the problems of stress superposition and contamination. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a laser marking device for double-sided silicon steel sheets that can avoid stress superposition, prevent lens contamination, and ensure processing quality.

[0004] To achieve the aforementioned technical objective, the technical solution adopted by this utility model is as follows:

[0005] A double-sided silicon steel sheet laser marking device includes a housing. The front side of the housing has a front opening for the silicon steel sheet to enter, and the rear side has a rear opening for the silicon steel sheet to exit. Inside the housing are a guide structure, an upper laser marking structure, and a lower laser marking structure. The guide structure is laterally positioned between the front and rear openings to clamp the silicon steel sheet, keeping it horizontal within the housing. The upper laser marking structure includes an upper laser, and the lower laser marking structure includes a lower laser. The upper laser is located above the silicon steel sheet and is used for laser marking on the upper surface of the sheet. The lower laser is located below the silicon steel sheet and is used for laser marking on the lower surface of the sheet. The upper and lower lasers are horizontally misaligned in the direction of sheet transport.

[0006] Furthermore, the guide structure includes several horizontally spaced guide roller assemblies, each guide roller assembly including an upper roller and a lower roller, the upper roller and the lower roller being respectively positioned above and below the silicon steel sheet, and the upper roller and the lower roller clamping the silicon steel sheet, both ends of the upper roller and the lower roller being rotatably mounted on the device housing.

[0007] Furthermore, the upper laser marking structure includes an upper laser, an upper mounting bracket, an upper lifting motor, an upper connecting plate, an upper horizontal slide, an upper slider, an upper horizontal motor, and an upper lead screw. The upper mounting bracket is fixedly installed inside the device housing. The upper lifting motor is fixedly installed on the upper mounting bracket, and the drive shaft of the upper lifting motor is connected to the upper connecting plate. The upper lifting motor can drive the upper connecting plate to move up and down. The upper horizontal slide is fixedly installed on the upper connecting plate, and the upper slider can be horizontally slidably installed on the upper horizontal slide. The upper horizontal motor is fixedly installed on the upper connecting plate or the upper horizontal slide. The drive shaft of the upper horizontal motor is connected to one end of the upper lead screw, which passes through the upper slider and is threadedly engaged with the upper slider. The upper horizontal motor can drive the upper slider to move horizontally through the upper lead screw. The upper laser is fixedly installed on the upper slider.

[0008] Furthermore, the upper laser marking structure also includes guide posts, of which there are four. The lower ends of the guide posts are fixedly installed at the four corners of the upper connecting plate, and the guide posts pass vertically through the upper mounting frame and slide in cooperation with the upper mounting frame.

[0009] Furthermore, the lower laser marking structure is located below the upper laser marking structure, and the lower laser marking structure includes a lower laser, a lower mounting bracket, a lower lifting motor, a lower connecting plate, a lower horizontal slide, a lower slider, a lower horizontal motor, and a lower lead screw, which are corresponding to the upper laser marking structure. The connection relationship of each structure in the lower laser marking structure is the same as the connection relationship of each structure in the upper laser marking structure.

[0010] Furthermore, a double-sided silicon steel sheet laser marking device also includes an air blade structure. The air blade structure includes a first blower, a first distribution pipe, an upper air blade tube, and a lower air blade tube. The first blower is connected to the first distribution pipe, which is connected to both the upper and lower air blade tubes. Both the upper and lower air blade tubes have air outlets. The upper air blade tube is located above the silicon steel sheet and is positioned in front of or behind the upper laser. The air outlet of the upper air blade tube faces the contact area between the laser of the upper laser and the upper surface of the silicon steel sheet. The lower air blade tube is located below the silicon steel sheet and is positioned in front of or behind the lower laser. The air outlet of the lower air blade tube faces the contact area between the laser of the lower laser and the lower surface of the silicon steel sheet.

[0011] Furthermore, a double-sided silicon steel sheet laser marking device also includes a negative pressure structure. The negative pressure structure includes a second blower, a second distribution pipe, an upper negative pressure pipe, and a lower negative pressure pipe. The second blower is connected to the second distribution pipe, which is connected to both the upper and lower negative pressure pipes. Both the upper and lower negative pressure pipes have negative pressure ports. The upper negative pressure pipe is located above the silicon steel sheet and on the opposite side of the upper laser relative to the upper air blade pipe. The negative pressure port of the upper negative pressure pipe faces the contact area between the laser of the upper laser and the upper surface of the silicon steel sheet. The lower negative pressure pipe is located below the silicon steel sheet and on the opposite side of the lower laser relative to the lower air blade pipe. The negative pressure port of the lower negative pressure pipe faces the contact area between the laser of the lower laser and the lower surface of the silicon steel sheet.

[0012] Furthermore, both the first blower and the second blower are fixedly installed at the bottom of the device housing, and the bottom of the device housing has a vent for gas to enter and exit.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model fundamentally solves the stress concentration problem caused by double-sided synchronous marking by setting the upper and lower lasers out of position in the transmission direction, avoiding stress superposition and ensuring the excellent performance of silicon steel sheets.

[0015] 2. The upper and lower laser marking structures both adopt independent lifting and horizontal moving mechanisms, which realizes precise control of the marking position and depth, and is highly flexible.

[0016] 3. It innovatively integrates the wind blade structure and the negative pressure structure to form a highly efficient "blowing and suction composite" dust removal system, which can actively remove pollutants, significantly extend the service life of optical components such as lasers, and ensure the stability and high quality of the engraving process.

[0017] 4. All functional modules are integrated into the device housing, resulting in a compact structure, high degree of automation, stable and reliable operation, and suitability for industrial continuous production. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0019] Figure 2 for Figure 1 Enlarged view of the local structure of the upper and lower laser regions, highlighting their misalignment.

[0020] Figure 3 This is a detailed schematic diagram of the laser-etched structure.

[0021] Figure 4 This is a structural schematic diagram of the upper wind blade tube.

[0022] Figure 5 This is a schematic diagram of the upper negative pressure pipe.

[0023] In the diagram: 1. Device housing; 11. Front opening; 12. Rear opening; 2. Guide structure; 21. Upper roller; 22. Lower roller; 3. Upper laser marking structure; 31. Upper laser; 32. Upper mounting bracket; 33. Upper lifting motor; 34. Upper connecting plate; 35. Upper horizontal slide; 36. Upper slider; 37. Upper horizontal motor; 38. Upper lead screw; 39. Guide column; 4. Lower laser marking structure; 41. Lower laser; 5. Wind blade structure; 51. First blower; 52. First distribution pipe; 53. Upper wind blade pipe; 54. Lower wind blade pipe; 6. Negative pressure structure; 61. Second blower; 62. Second distribution pipe; 63. Upper negative pressure pipe; 64. Lower negative pressure pipe; 7. Silicon steel sheet. Detailed Implementation

[0024] 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.

[0025] 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.

[0026] like Figure 1 and Figure 2 As shown, a double-sided silicon steel sheet laser marking device has a core consisting of a sealed housing 1. The silicon steel sheet 7 enters through a front opening 11 on the front side of the housing and exits through a rear opening 12 on the rear side. The driving power for the silicon steel sheet 7 is provided externally, specifically by a winding motor, and is not reflected in the structure of this utility model. Inside the housing, along the direction of the silicon steel sheet's travel, a guide structure 2, an upper laser marking structure 3, and a lower laser marking structure 4 are sequentially arranged.

[0027] The guide structure 2 consists of multiple sets of upper rollers 21 and lower rollers 22 arranged symmetrically. They together clamp and guide the silicon steel sheet 7 smoothly through the processing area and keep it in a horizontal state.

[0028] like Figure 2 and Figure 3 As shown, the upper laser marking structure 3 is fixed inside the housing by the upper mounting bracket 32. The upper lifting motor 33 drives the upper connecting plate 34 to move up and down along the guide column 39, thereby adjusting the focal length of the upper laser 31. The upper horizontal motor 37 drives the upper slider 36 to move horizontally on the upper horizontal slide 35 via the upper lead screw 38, thereby driving the upper laser 31 to perform transverse marking scanning. The lower laser marking structure 4 (not all of its components are shown in the figure) is arranged symmetrically with the upper structure with the same mechanical structure and drives the lower laser 41 to move. The key is that the upper laser 31 and the lower laser 41 are in the same direction of conveying the silicon steel sheet 7 ( Figure 2 There is a horizontal distance D in the middle (from left to right), which is a staggered arrangement.

[0029] The first blower 51 of the wind blade structure 5 generates high-pressure gas, which is delivered to the upper wind blade tube 53 and the lower wind blade tube 54 respectively through the first distribution pipe 52. The upper wind blade tube 53 is located behind the scoring point of the upper laser 31, and its air outlet blows air obliquely downward toward the scoring area; the lower wind blade tube 54 is located behind the scoring point of the lower laser 41, and its air outlet blows air obliquely upward toward the scoring area, forming a protective air curtain.

[0030] The second blower 61 of the negative pressure structure 6 generates negative pressure, which is connected to the upper negative pressure pipe 63 and the lower negative pressure pipe 64 via the second distribution pipe 62. The upper negative pressure pipe 63 is located in front of the scoring point of the upper laser 31 (i.e., the side opposite to the upper air blade pipe 53), and its negative pressure port is aimed at the scoring area to draw air; the lower negative pressure pipe 64 is located in front of the scoring point of the lower laser 41, and its negative pressure port is aimed at the scoring area to draw air. The air blade and the negative pressure work together to form a highly efficient local clean environment.

[0031] During operation, the silicon steel sheet 7 continuously passes through the device. The upper laser 31 first etches a mark on the upper surface of the silicon steel sheet. As the silicon steel sheet moves forward and is offset by a certain distance, the lower laser 41 then etches a mark at the corresponding position on its lower surface. Throughout this process, the air blade and negative pressure system operate continuously to ensure that the laser head lens is clean and the processing area is free from contamination.

[0032] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the protection scope of this utility model.

Claims

1. A laser marking device for double-sided silicon steel sheets, comprising a device housing (1), wherein the front side of the device housing (1) is provided with a front opening (11) for the silicon steel sheet (7) to enter, and the rear side of the device housing (1) is provided with a rear opening (12) for the silicon steel sheet (7) to exit, characterized in that: The device housing (1) is provided with a guide structure (2), an upper laser marking structure (3), and a lower laser marking structure (4). The guide structure (2) is arranged horizontally between the front opening (11) and the rear opening (12) to clamp the silicon steel sheet (7) so that the silicon steel sheet (7) is kept horizontal in the device housing (1). The upper laser marking structure (3) includes an upper laser (31), and the lower laser marking structure (4) includes a lower laser (41). The upper laser (31) is located above the silicon steel sheet (7) and is used to laser mark the upper surface of the silicon steel sheet (7). The lower laser (41) is located below the silicon steel sheet (7) and is used to laser mark the lower surface of the silicon steel sheet (7). The upper laser (31) and the lower laser (41) are horizontally misaligned in the conveying direction of the silicon steel sheet (7).

2. The laser marking device for double-sided silicon steel sheets according to claim 1, characterized in that: The guide structure (2) includes several horizontally spaced guide roller assemblies. Each guide roller assembly includes an upper roller (21) and a lower roller (22). The upper roller (21) and the lower roller (22) are respectively positioned above and below the silicon steel sheet (7), and the upper roller (21) and the lower roller (22) clamp the silicon steel sheet (7). Both ends of the upper roller (21) and the lower roller (22) can be rotatably mounted on the device housing (1).

3. The laser marking device for double-sided silicon steel sheets according to claim 1, characterized in that: The upper laser marking structure (3) includes an upper laser (31), an upper mounting bracket (32), an upper lifting motor (33), an upper connecting plate (34), an upper horizontal slide (35), an upper slider (36), an upper horizontal motor (37), and an upper lead screw (38). The upper mounting bracket (32) is fixedly installed inside the device housing (1). The upper lifting motor (33) is fixedly installed on the upper mounting bracket (32). The drive shaft of the upper lifting motor (33) is connected to the upper connecting plate (34). The upper lifting motor (33) can drive the upper connecting plate (34) to move up and down. The upper horizontal slide (35) is fixedly installed inside the device housing (1). The upper slider (36) is fixedly mounted on the upper connecting plate (34), and the upper horizontal slide (36) is horizontally slidably mounted on the upper horizontal slide (35). The upper horizontal motor (37) is fixedly mounted on the upper connecting plate (34) or the upper horizontal slide (35). The drive shaft of the upper horizontal motor (37) is connected to one end of the upper lead screw (38). The upper lead screw (38) passes through the upper slider (36), and the upper lead screw (38) and the upper slider (36) are threaded together. The upper horizontal motor (37) can drive the upper slider (36) to move horizontally through the upper lead screw (38). The upper laser (31) is fixedly mounted on the upper slider (36).

4. The laser marking device for double-sided silicon steel sheets according to claim 3, characterized in that: The upper laser marking structure (3) also includes guide posts (39). There are four guide posts (39). The lower ends of the guide posts (39) are fixedly installed at the four corners of the upper connecting plate (34). The guide posts (39) pass vertically through the upper mounting bracket (32) and slide with the upper mounting bracket (32).

5. The laser marking device for double-sided silicon steel sheets according to claim 3, characterized in that: The lower laser marking structure (4) is located below the upper laser marking structure (3), and the lower laser marking structure (4) includes a lower laser (41), a lower mounting bracket, a lower lifting motor, a lower connecting plate, a lower horizontal slide, a lower slider, a lower horizontal motor, and a lower lead screw, which are corresponding to the upper laser marking structure (3). The connection relationship of each structure in the lower laser marking structure (4) is the same as the connection relationship of each structure in the upper laser marking structure (3).

6. The laser marking device for double-sided silicon steel sheets according to claim 1, characterized in that: It also includes a wind blade structure (5), which includes a first blower (51), a first distribution pipe (52), an upper wind blade tube (53), and a lower wind blade tube (54). The first blower (51) is connected to the first distribution pipe (52), and the first distribution pipe (52) is connected to the upper wind blade tube (53) and the lower wind blade tube (54) respectively. Both the upper wind blade tube (53) and the lower wind blade tube (54) are provided with air outlets. The upper wind blade tube (53) is located on the silicon steel sheet (7). Above, the upper wind blade tube (53) is located in front of or behind the upper laser (31), and the air outlet of the upper wind blade tube (53) faces the contact area between the laser of the upper laser (31) and the upper surface of the silicon steel sheet (7). The lower wind blade tube (54) is located below the silicon steel sheet (7), and the lower wind blade tube (54) is located in front of or behind the lower laser (41), and the air outlet of the lower wind blade tube (54) faces the contact area between the laser of the lower laser (41) and the lower surface of the silicon steel sheet (7).

7. The laser marking device for double-sided silicon steel sheets according to claim 6, characterized in that: It also includes a negative pressure structure (6), which includes a second blower (61), a second distribution pipe (62), an upper negative pressure pipe (63), and a lower negative pressure pipe (64). The second blower (61) is connected to the second distribution pipe (62), and the second distribution pipe (62) is connected to the upper negative pressure pipe (63) and the lower negative pressure pipe (64) respectively. Negative pressure ports are opened on both the upper negative pressure pipe (63) and the lower negative pressure pipe (64). The upper negative pressure pipe (63) is located above the silicon steel sheet (7), and the upper negative pressure pipe... (63) Located on the other side of the upper laser (31) relative to the upper wind blade tube (53), the negative pressure port of the upper negative pressure tube (63) faces the contact area between the laser of the upper laser (31) and the upper surface of the silicon steel sheet (7). The lower negative pressure tube (64) is located below the silicon steel sheet (7). At the same time, the lower negative pressure tube (64) is located on the other side of the lower laser (41) relative to the lower wind blade tube (54), and the negative pressure port of the lower negative pressure tube (64) faces the contact area between the laser of the lower laser (41) and the lower surface of the silicon steel sheet (7).

8. The laser marking device for double-sided silicon steel sheets according to claim 7, characterized in that: The first blower (51) and the second blower (61) are both fixedly installed at the bottom of the device housing (1), and the bottom of the device housing (1) is provided with a vent for gas to enter and exit.

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