Silicon steel sheet optical fiber laser three-spot welding device for strip steel production line

Abstract

The utility model discloses an optical fiber laser three-spot welding device for a silicon steel sheet on a strip steel production line, which relates to the technical field of strip steel manufacturing and comprises a laser, a working optical fiber, a welding trolley frame, a laser head position adjusting device and a laser head, and the laser head position adjusting device is mounted between guide wheels on a welding machine and moves up and down along with the guide wheels; a laser head is mounted below the laser head position adjusting device; the laser device is installed beside the welding machine, and a light source generated by the laser device is transmitted to the laser head through the working optical fiber. The silicon steel sheet optical fiber laser three-spot welding device for the strip steel production line is simple in structure, convenient to use and capable of improving scarps of weld joint straight grooves, changing straight ridges into smooth transition, effectively reducing the phenomenon of stress concentration at the weld joint grooves, reducing the phenomenon of strip steel weld joint breakage, greatly improving the one-time welding success rate, reducing the rewelding rate and improving the production efficiency. The welding stability is improved, the production cost is greatly reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of strip steel manufacturing, in particular to a silicon steel thin plate optical fiber laser three-spot welding device for a strip steel production line. Background Art

[0002] When welding metal materials like silicon steel, fiber lasers produce a violent reaction on the surface of the molten pool due to the extremely short wavelength of the laser. This creates a significant problem: excessive spatter. This spatter consumes some of the metal in the weld pool, creating unfilled grooves in the weld and compromising weld quality.

[0003] Therefore, the utility model proposes a three-spot fiber laser welding device for silicon steel thin plates in a strip steel production line to alleviate spatter and smooth transition grooves to solve the above problems. Utility Model Content

[0004] The utility model proposes a three-spot fiber laser welding device for silicon steel thin plates in a strip steel production line, which has a simple structure and is easy to use. This device can ensure a smooth transition on both sides of the weld groove when welding silicon steel, greatly improving the stability of the silicon steel weld quality, thereby solving the problems raised in the prior art.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions: a fiber laser three-spot welding device for silicon steel thin plates in a strip steel production line, comprising a laser, a working optical fiber, a drag chain mechanism, a welding trolley frame, a focusing mechanism, a linear track, a laser head position adjustment device, a laser head, a guide wheel, a support wheel, and a strip steel.

[0006] The laser head position adjustment device is installed between the guide wheels on the welding machine and moves up and down with the guide wheels; a laser head is installed below the laser head position adjustment device;

[0007] The laser is installed beside the welding machine, and the light source generated by the laser is transmitted to the laser head through the working optical fiber.

[0008] Furthermore, two guide wheels are provided.

[0009] Furthermore, after the strip is seamed, the guide wheel is pressed on the support wheel, and the welding carriage begins to move from the operating side to the transmission side. The strip enters between the guide wheel and the support wheel and is pressed, and the strip welding begins.

[0010] Furthermore, the laser is connected to the welding trolley frame through a drag chain mechanism.

[0011] Furthermore, the symmetry axes of the laser head and the guide wheel are on the same plane.

[0012] Furthermore, a focusing mechanism and a linear track are respectively installed above the laser head position adjustment device.

[0013] Furthermore, the focusing mechanism and the linear track are arranged within the range of the welding carriage.

[0014] Compared with the existing technology, the advantages and positive effects of the utility model are: the silicon steel thin plate fiber laser three-spot welding device of the strip steel production line has a simple structure and is easy to use. It can improve the steepness of the straight groove of the weld and change the straight groove into a smooth transition, effectively reducing the stress concentration phenomenon at the weld groove and reducing the phenomenon of strip weld fracture, greatly improving the success rate of one-time welding, reducing the re-welding rate, improving welding stability, greatly reducing production costs and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of the welding device of the utility model;

[0016] Figure 2 The three-light diagram used in this utility model;

[0017] Figure 3 This is a schematic diagram of three-spot welding in the utility model.

[0018] Legend: 1. Laser, 2. Working optical fiber, 3. Drag chain mechanism, 4. Welding trolley frame, 5. Focusing mechanism, 6. Linear track, 7. Laser head position adjustment device, 8. Laser head, 9. Guide wheel, 10. Support wheel, 11. Strip steel. DETAILED DESCRIPTION

[0019] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0020] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0021] like Figure 1 As shown, the utility model provides a silicon steel sheet fiber laser three-spot welding device for a strip steel production line, comprising a laser 1, a working optical fiber 2, a drag chain mechanism 3, a welding trolley frame 4, a focusing mechanism 5, a linear track 6, a laser head position adjustment device 7, a laser head 8, a guide wheel 9, a support wheel 10, and a strip steel 11.

[0022] There are two guide wheels 9.

[0023] The laser head position adjustment device 7 is installed between the guide wheels 9 on the welding machine and moves up and down with the guide wheels 9; a laser head 8 is installed below the laser head position adjustment device 7, and the symmetry axis of the laser head 8 and the guide wheels 9 are on the same plane; a focusing mechanism 5 and a linear track 6 are installed above the laser head position adjustment device 7, and the focusing mechanism 5 and the linear track 6 are set within the range of the welding trolley frame 4;

[0024] After the steel strip 11 is seamed, the guide wheel 9 is pressed on the support wheel 10, and the welding carriage 4 starts to move from the operating side to the transmission side. The steel strip 11 enters between the guide wheel and the support wheel and is pressed, so that the steel strip can be welded.

[0025] The laser 1 is installed next to the welding machine. The light source generated by the laser 1 is transmitted to the laser head 8 through the working optical fiber 2. The laser 1 is connected to the welding trolley frame 4 through the drag chain mechanism 3.

[0026] The laser head 8 emits a laser to illuminate a certain point of the strip seam, and then the trolley moves to complete the welding work of the entire length of the seam.

[0027] Working principle: The laser head 8 moves with the welding carriage 4, the laser 1 is started, and three matched laser beams, namely the main beam and two ablation beams, are transmitted to the laser head 8 through the multi-channel working optical fiber 2. The three laser beams are irradiated onto the upper surface of the plate and strip through the collimator and focusing lens inside the laser head 8. The main beam generates high temperature to melt the plate and strip base material at the joint. The two ablation beams are respectively irradiated onto the plate and strip close to the entrance and exit sides of the main beam, and the edges on both sides of the main weld are fused and transitioned with the plate and strip with lower power, so that a smooth transition is achieved between the local welds on both sides of the groove of the main weld and the base material, thereby reducing the stress concentration in the weld groove.

[0028] The utility model adopts a three-spot welding method, that is, the laser energy is divided into three channels for output. There are three beams of light at the output end of the laser head: the middle is the main beam, which carries 2 / 3 of the energy; there are two ablation beams on both sides of the main beam, which carry 1 / 3 of the energy. The main function is to use low-energy laser to fuse the edges on both sides of the main weld with the original plate, so that a smooth transition is achieved between the local welds on both sides of the groove of the main weld and the base material.

[0029] In order to stably irradiate the laser on the strip seam, a laser head position adjustment device 7 is designed and installed on the welding carriage 4. The focus position is adjustable in four dimensions (three translations and one rotation) to ensure that the light spot is vertically irradiated on the center of the strip seam in the entry and exit directions.

[0030] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in any other form. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification of the above embodiment made according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A fiber laser three-spot welding device for silicon steel thin plates in a strip steel production line, comprising a laser (1), a working optical fiber (2), a drag chain mechanism (3), a welding trolley frame (4), a focusing mechanism (5), a linear track (6), a laser head position adjustment device (7), a laser head (8), a guide wheel (9), a support wheel (10), and a strip steel (11), characterized in that: The laser head position adjustment device (7) is installed between the guide wheels (9) on the welding machine and moves up and down with the guide wheels (9); a laser head (8) is installed below the laser head position adjustment device (7); The laser (1) is installed next to the welding machine, and the light source generated by the laser (1) is transmitted to the laser head (8) through the working optical fiber (2).

2. The fiber laser three-spot welding device for silicon steel sheets in a strip steel production line according to claim 1 is characterized in that: Two guide wheels (9) are provided.

3. The fiber laser three-spot welding device for silicon steel sheets in a strip steel production line according to claim 1 is characterized in that: After the steel strip (11) is seamed, the guide wheel (9) is pressed on the support wheel (10), and the welding carriage (4) begins to move from the operating side to the transmission side. The steel strip (11) enters between the guide wheel and the support wheel and is pressed, and the welding of the steel strip (11) begins.

4. The fiber laser three-spot welding device for silicon steel sheets in a strip steel production line according to claim 1 is characterized in that: The laser (1) is connected to the welding trolley frame (4) via a drag chain mechanism (3).

5. The fiber laser three-spot welding device for silicon steel sheets in a strip steel production line according to claim 1, characterized in that: The symmetry axes of the laser head (8) and the guide wheel (9) are on the same plane.

6. The fiber laser three-spot welding device for silicon steel sheets in a strip steel production line according to claim 1, characterized in that: A focusing mechanism (5) and a linear track (6) are respectively installed above the laser head position adjustment device (7).

7. The optical fiber laser three-spot welding device for silicon steel sheets in a strip steel production line according to claim 1, characterized in that: The focusing mechanism (5) and the linear track (6) are arranged within the range of the welding carriage (4).

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