Composite welding device for composite wear-resistant steel plate

Abstract

The invention discloses a composite wear-resistant steel plate composite welding device, and belongs to the field of laser welding, the composite wear-resistant steel plate composite welding device comprises a turning plate, a laser welding head and an electric arc welding head are fixedly mounted on the front surface of the turning plate, a support frame is arranged above the turning plate, and an electric push rod is fixedly connected below the support frame; the lower end of the electric push rod is fixedly connected with a connecting piece, a lifting frame is fixedly connected below the connecting piece, and the right side of the lifting frame penetrates through and is rotationally connected with a rotating shaft. The laser welding head and the electric arc welding head are protected by arranging the baffle and the blocking cover, and the laser welding head and the electric arc welding head are in a flat laying state in an idle state and are stored in the baffle and the blocking cover, so that when the laser welding head and the electric arc welding head need to be used, the laser welding head and the electric arc welding head need to be used; and when the laser welding head and the electric arc welding head descend to approach the steel plate, the steel plate can be moved out of the baffle and the blocking cover, so that the laser welding head and the electric arc welding head can be conveniently protected when the steel plate is not used.

Description

Technical Field

[0001] The present application relates to the field of laser welding, and in particular to a composite welding device for composite wear-resistant steel plates. Background Art

[0002] Welding technology is one of the key technologies in the engineering manufacturing process. Laser welding technology is widely used in aerospace, high-speed trains, automobiles and other industrial production due to its outstanding advantages such as high energy density, fast welding speed, large weld depth-to-width ratio, good joint performance, and small deformation of welded structure. However, the above advantages will be greatly reduced when laser welding non-ferrous metal alloys with high reflectivity. According to the characteristics of the alloy material to be processed, it is difficult to weld thicker alloy structures using laser as a heat source alone. At the same time, welding defects are caused by excessive welding cooling speed. The laser-arc hybrid welding method organically combines the two heat sources of laser and arc, and improves the absorption of laser energy and the stability of the arc through the interaction between laser and arc.

[0003] The patent document with announcement number CN114918545B discloses a composite wear-resistant steel plate composite welding device. The invention relates to a composite wear-resistant steel plate composite welding device, including a workbench and an electric slide rail arranged at the upper end of the workbench, and also includes a composite welding module, wherein the composite welding module is installed at the upper end of the electric slide rail, and the electric slide rail is used to drive the composite welding module to move back and forth left and right. The composite welding module adopts a welding design combining laser and arc. The composite welding module reciprocates during the reciprocating movement of the electric slide rail. At the same time, the distance between the composite welding module and the steel plate is adaptively adjusted according to the depth of the weld. In the above application document, the steel plate is welded by a welding method combining laser and arc. However, its laser welding head and arc welding head are always exposed to the outside. During long-term use, it is easy to fall dust or be damaged by external force collision. It is not convenient to release the laser welding head and arc welding head when the steel plate needs to be welded, and it is not convenient to protect the laser welding head and arc welding head. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a composite wear-resistant steel plate composite welding device, which solves the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present application provides a composite wear-resistant steel plate composite welding device, including a flip plate, a laser welding head and an arc welding head are fixedly installed on the front of the flip plate, a support frame is arranged above the flip plate, an electric push rod is fixedly connected to the bottom of the support frame, a connecting piece is fixedly connected to the lower end of the electric push rod, a lifting frame is fixedly connected to the bottom of the connecting piece, a rotating shaft passes through the right side of the lifting frame and is rotatably connected, the rotating shaft passes through and is fixedly connected to the right side of the flip plate, a spring telescopic rod and a limit telescopic rod are fixedly connected to the bottom of the support frame, The lower ends of the spring telescopic rod and the limit telescopic rod are fixedly connected with a mounting plate, the lower ends of the mounting plate are fixedly connected with a rack, the front side of the rack is meshed with a first gear, the first gear is fixedly connected to the right end of the rotating shaft, the lower end of the rack is fixedly connected with a top plate, a limit plate is arranged above the top plate, the limit plate is fixedly connected to the right side of the lifting frame, the front side of the lifting frame is fixedly connected with a baffle plate, the front side of the baffle plate is hinged with a baffle cover, the right side of the baffle cover is equipped with a switch assembly for opening the baffle cover, and the bottom of the lifting frame is equipped with a limit assembly for preventing the laser welding head from colliding with the steel plate.

[0006] Preferably, a base plate is provided below the laser welding head and the arc welding head, and an electric slide rail is fixedly installed above the base plate.

[0007] Preferably, a sliding seat is slidably connected to the upper part of the electric slide rail, and the sliding seat is fixedly connected to the lower part of the support frame.

[0008] Preferably, the switch assembly includes a rotating column, which is fixedly connected to the right side of the baffle, a swing bar is fixedly connected above the rotating column, an arc-shaped tooth plate is fixedly connected to the upper end of the swing bar, a second gear is meshed above the arc-shaped tooth plate, the second gear is fixedly connected to the right side of the baffle cover, a support plate is fixedly connected to the right side of the baffle, and a tension spring is elastically connected between the support plate and the swing bar.

[0009] Preferably, the switch assembly further comprises a push seat, the push seat is fixedly connected to the front side of the rotating shaft, and a lifting rod is fixedly connected to the left side of the push seat.

[0010] Preferably, a limit block is provided below the swing bar, and the limit block is fixedly connected to the right side of the baffle.

[0011] Preferably, the limit assembly includes a rotating rod, which passes through the left and right sides of the lifting frame and is rotatably connected. The outer surface of the rotating rod is fixedly connected to a limit strip. There are two limit strips, and rollers are rotatably connected to opposite sides of the two limit strips.

[0012] Preferably, the limiting assembly further includes a third gear, the third gear is fixedly connected to the outer surface of the rotating shaft, a fourth gear is meshed below the third gear, and the fourth gear is fixedly connected to the outer surface of the rotating rod.

[0013] The benefits of this application are: (1) The present application provides a baffle and a shield to protect the laser welding head and the arc welding head. When the laser welding head and the arc welding head are idle, they are laid flat and stored in the baffle and the shield. When the laser welding head and the arc welding head are needed, they will be moved out of the baffle and the shield as they descend and approach the steel plate, thereby protecting the laser welding head and the arc welding head when they are idle.

[0014] (2) The present application opens and closes the shield by setting a switch assembly. The shield is closed only when the laser welding head and the arc welding head are completely flat. When they are flat at a certain angle, the shield is in the open state, which facilitates the inspection and maintenance of the laser welding head and the arc welding head.

[0015] (3) The present application sets a limit assembly to contact the surface of the steel plate to prevent the laser welding head and the arc welding head from colliding with the steel plate when they descend. The limit assembly will follow the adjustment of the laser welding head and the arc welding head to be flat or vertical, which has the function of freeing up more space in the idle state to facilitate loading and unloading. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The schematic embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application. In the drawings: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a right view of the overall structure of the present invention; Figure 3 It is a schematic diagram of the overall structure of the present invention in an open state; Figure 4 This is a rear view of the overall structure of the present invention in an opened state; Figure 5 It is a schematic diagram of the overall structure recovery state of the present invention; Figure 6 The present invention Figure 2 A schematic diagram of the structure enlargement in the middle; Figure 7 The present invention Figure 3 A magnified schematic diagram of the structure at B in the middle; Figure 8 The present invention Figure 4 A magnified schematic diagram of the structure at C in the middle; Fig. 9 The present invention Figure 5 Enlarged schematic diagram of the structure at point D in the middle.

[0017] In the above figure, 1. Flip plate; 2. Laser welding head; 3. Arc welding head; 4. Support frame; 401. Electric push rod; 402. Lifting frame; 403. Rotating shaft; 404. Connecting piece; 405. Spring telescopic rod; 406. Limiting telescopic rod; 407. Mounting piece; 408. Rack; 409. First gear; 410. Top piece; 411. Limiting piece; 412. Baffle; 413. Baffle cover; 5. Switch assembly; 501, rotating column; 502, swing bar; 503, arc-shaped tooth plate; 504, second gear; 505, supporting plate; 506, tension spring; 507, pushing seat; 508, lifting rod; 509, limiting block; 6, limiting assembly; 601, rotating rod; 602, limiting bar; 603, roller; 604, third gear; 605, fourth gear; 7, bottom plate; 8, electric slide rail; 9, sliding seat. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only embodiments of a part of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present application.

[0019] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application are described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, the process, method, system, product or equipment comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0020] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0021] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0022] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0023] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. Example

[0024] See also Figure 1-Figure 9The present embodiment provides a composite wear-resistant steel plate composite welding device, including a flip plate 1, the thickness of the flip plate 1 is relatively thick, and a laser welding head 2 and an arc welding head 3 are fixedly installed on the front of the flip plate 1. The laser welding head 2 and the arc welding head 3 are used to perform laser arc composite welding on the composite wear-resistant steel plate, which is a prior art. A support frame 4 is arranged above the flip plate 1, and the shape of the support frame 4 is L-shaped. An electric push rod 401 is fixedly connected to the bottom of the support frame 4. The number of the electric push rods 401 is two. A connecting piece 404 is fixedly connected to the lower end of the electric push rod 401. The number of the connecting pieces 404 is two. A lifting frame 402 is fixedly connected to the bottom of the connecting piece 404. The shape of the lifting frame 402 is U-shaped. The right side of the lifting frame 402 passes through and rotates The support frame 4 is rotatably connected with a rotating shaft 403, which passes through the right side of the lifting frame 402. Bearings are arranged between the rotating shaft 403 and the penetration points on the left and right sides of the lifting frame 402. The rotating shaft 403 passes through the right side of the flip plate 1 and is fixedly connected. The rotation of the rotating shaft 403 can drive the flip plate 1 to flip. A spring telescopic rod 405 and a limit telescopic rod 406 are fixedly connected below the support frame 4. The spring telescopic rod 405 is in a retracted state in a normal state. When the spring telescopic rod 405 is extended, the spring inside it will be stretched. When the spring telescopic rod 405 is released, it will automatically retract under the action of the spring inside it. The lower ends of the spring telescopic rod 405 and the limit telescopic rod 406 are fixedly connected with a mounting plate 407. The limit telescopic rod 406 has a The main body is an ordinary telescopic rod, which is used to limit the lifting range of the mounting plate 407. The lower end of the mounting plate 407 is fixedly connected to a rack 408, and the tooth surface of the rack 408 faces the front. The front of the rack 408 is meshed with a first gear 409, and the first gear 409 is fixedly connected to the right end of the rotating shaft 403. The lower end of the rack 408 is fixedly connected to a top plate 410, and a limiting plate 411 is arranged above the top plate 410. The limiting plate 411 is used to support the top plate 410 and pull the rack 408 downward to ensure the downward rolling range of the first gear 409 on the rack 408. The limiting plate 411 is fixedly connected to the right side of the lifting frame 402, and the front of the lifting frame 402 is fixedly connected to a baffle 412. The number of baffles 412 is two, and the baffles 412 are positive. The surface is hinged with a shield 413, and the hinge point between the shield 413 and the baffle 412 is at the corner position above the front of the baffle 412. The shield 413 can be flipped up and lifted. A switch component 5 for opening the shield 413 is installed on the right side of the shield 413. The switch component 5 is arranged on the baffle 412 located on the right side. A limit component 6 for preventing the laser welding head 2 from colliding with the steel plate is installed under the lifting frame 402. The limit component 6 can first contact the steel plate after the laser welding head 2 and the arc welding head 3 are lowered, so that the laser welding head 2 and the arc welding head 3 maintain a suitable distance from the surface of the steel plate for laser arc composite welding. A bottom plate 7 is arranged under the laser welding head 2 and the arc welding head 3. The bottom plate 7 is used to place the composite wear-resistant steel plate to be welded.An external clamp is set on the bottom plate 7 to clamp and fix the composite wear-resistant steel plate under the laser welding head 2 and the arc welding head 3. An electric slide rail 8 is fixedly installed on the top of the bottom plate 7. A sliding seat 9 is slidably connected on the top of the electric slide rail 8. The electric slide rail 8 can drive the sliding seat 9 to slide back and forth. It is a prior art. The sliding seat 9 is fixedly connected to the bottom of the support frame 4. The sliding seat 9 slides back and forth on the electric slide rail 8 to drive the support frame 4 to move the laser welding head 2 and the arc welding head 3 back and forth, so as to perform mobile welding at the weld position of the composite wear-resistant steel plate.

[0025] When the above-mentioned equipment is used, the two composite wear-resistant steel plates to be welded are first placed on the bottom plate 7 and clamped at a high height using an external clamp so that the weld between the composite wear-resistant steel plates is below the lifting frame 402. When welding is required, the electric push rod 401 is first started to extend it, and the extension of the electric push rod 401 will push the connecting piece 404 down, and the lowering of the connecting piece 404 will drive the lifting frame 402 to descend, and the lowering of the lifting frame 402 will drive the rotating shaft 403 to descend, and the lowering of the rotating shaft 403 will drive the first gear 409 to descend. At this time, the first gear 409 will roll on the rack 408, so that the first gear 409 will rotate toward the front during the descent process. The rotation of the first gear 409 toward the front will drive the rotating shaft 403 to rotate toward the front, and then drive the flip plate 1 to flip toward the front. The flip plate 1 will drive the laser welding head 2 and the arc welding head 3 to flip from a flat state to a vertical downward state, so as to move out of the baffle 412 and the baffle cover 413 and align with the composite wear-resistant steel plate on the bottom plate 7 to prepare for welding. As the lifting frame 402 descends, it will also drive the limit plate 411 to descend. The limit plate 41 After the first gear 409 descends to a certain height, it will support the top plate 410. At this time, as the lifting frame 402 descends, the limiting plate 411 will be driven to make the top plate 410 descend, thereby pulling the rack 408 and the mounting plate 407 to make it follow the lifting frame 402 to descend, thereby making the spring telescopic rod 405 and the limiting telescopic rod 406 extend, and the first gear 409 will not roll on the rack 408 when it descends, thereby limiting the rotation angle of the first gear 409 during the descent process so that it can be rotated 90 degrees to adjust the laser welding head 2 and the arc welding head 3 from a horizontal state to a vertical state. At this time, the electric push rod 401 continues to push the connecting rod 409. The connecting piece 404 causes the lifting frame 402 to descend so that the vertical laser welding head 2 and the arc welding head 3 can approach the composite wear-resistant steel plate. By starting the laser welding head 2 and the arc welding head 3, laser arc composite welding is performed on the weld between the two composite wear-resistant steel plates. At the same time, the electric slide rail 8 is started, and the sliding seat 9 is driven by the electric slide rail 8 to slide back and forth to drive the support frame 4 to move back and forth. The support frame 4 moves back and forth to drive the electric push rod 401 and the lifting frame 402 to move the laser welding head 2 and the arc welding head 3 back and forth, so as to move back and forth at the weld position of the composite wear-resistant steel plate for welding. Example

[0026] See also Figure 2-Figure 9 The switch assembly 5 includes a rotating column 501, which is fixedly connected to the right side of the baffle 412. The rotating column 501 is arranged on the baffle 412 located on the right side. A swing bar 502 is fixedly connected above the rotating column 501. An arc-shaped toothed plate 503 is fixedly connected to the upper end of the swing bar 502. The arc center of the arc-shaped toothed plate 503 is arranged on the rotation axis of the rotating column 501. A second gear 504 is meshed above the arc-shaped toothed plate 503. The center of the second gear 504 is arranged on the hinged motion axis between the baffle cover 413 and the baffle 412. The second gear 504 is fixedly connected to the right side of the baffle cover 413. A supporting sheet 505 is fixedly connected to the right side of the baffle 412. A tension spring 506 is elastically connected between the supporting sheet 505 and the swing bar 502. The upper end of the tension spring 506 is fixedly connected to the bottom of the swing bar 502, and the lower end of the tension spring 506 is fixedly connected to the top of the support sheet 505. Under normal conditions, 506 will apply a pulling force to make the swing bar 502 close to the supporting piece 505. The switch assembly 5 also includes a pushing seat 507. The pushing seat 507 is L-shaped. The pushing seat 507 is fixedly connected to the front of the rotating shaft 403. The rotation of the rotating shaft 403 can drive the pushing seat 507 to rotate. A lifting rod 508 is fixedly connected to the left side of the pushing seat 507. The lifting rod 508 can contact and press the swing bar 502 to lift it upward. The contact position between the lifting rod 508 and the swing bar 502 is close to the rotating column 501. A limit block 509 is set below the swing bar 502. The limit block 509 is used to limit the swing bar 502, so that when the tension spring 506 applies a pulling force to pull the swing bar 502 toward the supporting piece 505, the swing bar 502 will lean against the limit block 509. The limit block 509 is fixedly connected to the right side of the baffle 412, and the limit block 509 is set on the baffle 412 located on the right side.

[0027] When the above device is used, when the first gear 409 descends and rolls on the rack 408, the first gear 409 rotates toward the front during the descent process, which drives the push seat 507 to lower the lifting rod 508. At this time, the lifting rod 508 will move away from the swing bar 502, thereby canceling the support for the swing bar 502. At this time, the tension spring 506 will apply a tension to pull the swing bar 502 toward the supporting plate 505, and the swing bar 502 will drive the arc-shaped toothed plate 503 to move toward the front. The arc-shaped toothed plate 503 will drive the second gear 504 to rotate backward, thereby driving the shield 413 The lifting frame 402 is lifted upward on the baffle 412. When the welding of the composite wear-resistant steel plate is completed, the electric push rod 401 is contracted to drive the connecting piece 404 to make the lifting frame 402 rise. The lowering of the lifting frame 402 will drive the rotating shaft 403 and the first gear 409 to rise. The rise of the lifting frame 402 will also drive the limit piece 411 to rise. At this time, the extended spring telescopic rod 405 will gradually retract, and then pull the installation piece 407 and the rack 408 so that the top piece 410 will always be against the limit piece 411 and rise with it. When it rises to the state where the spring telescopic rod 405 is fully retracted, At this time, as the lifting frame 402 rises, the second gear 504 will roll on the rack 408, thereby driving the rotating shaft 403 to rotate backward during the rising process. The rotating shaft 403 will drive the flip plate 1 to flip the laser welding head 2 and the arc welding head 3 backward so that they flip from a vertical downward position to a flat position. During the process of the rotating shaft 403 rotating backward, the ejecting seat 507 will be driven to lift the lifting rod 508 upward. When the lifting rod 508 is lifted to a state of contacting the swing bar 502, the laser welding head 2 and the arc welding head 3 will flip to a nearly horizontal state. At this time, the laser welding head 2 and the arc welding head 3 It will point to the front for easy maintenance and replacement. The continued rise of the lifting frame 402 will make the rotating shaft 403 continue to rotate backward, which will drive the pushing seat 507 and the lifting rod 508 to continue to lift upward and push the swing bar 502 upward. The swing bar 502 will drive the arc-shaped tooth plate 503 to move the second gear 504 to make it rotate toward the front, and then drive the baffle 413 to close downward on the baffle 412, so that when the laser welding head 2 and the arc welding head 3 are flipped to a completely horizontal state, the baffle 413 is lowered to cover the laser welding head 2 and the arc welding head 3, thereby playing a protective role. Example

[0028] See also Figure 3-Figure 8The limiting assembly 6 includes a rotating rod 601, which penetrates and is rotatably connected to the left and right sides of the lifting frame 402. A bearing is arranged between the penetration of the rotating rod 601 and the lifting frame 402. The outer surface of the rotating rod 601 is fixedly connected to a limiting strip 602. The number of the limiting strips 602 is two. The two limiting strips 602 are respectively arranged on the left and right sides of the lifting frame 402. The opposite sides of the two limiting strips 602 are rotatably connected with rollers 603. The rollers 603 are used to contact the composite wear-resistant steel plate and roll on its surface. When the rollers 603 contact the composite wear-resistant steel plate, a certain distance is left between the laser welding head 2 and the arc welding head 3 and the composite wear-resistant steel plate. The limiting assembly 6 also includes a third gear 604, which is fixedly connected to the outer surface of the rotating shaft 403. A fourth gear 605 is meshed below the third gear 604. The third gear 604 and the fourth gear 605 are arranged on the left side of the lifting frame 402, and the fourth gear 605 is fixedly connected to the outer surface of the rotating rod 601.

[0029] When the above-mentioned equipment is used in practice, when the first gear 409 descends and rolls on the rack 408, the first gear 409 drives the rotating shaft 403 to rotate toward the front during the descent process. At the same time, the rotation of the rotating shaft 403 toward the front will drive the third gear 604 to rotate toward the front, and the rotation of the third gear 604 toward the front will drive the fourth gear 605 to rotate backward. The rotation of the fourth gear 605 toward the backward will drive the limit bar 602 to flip downward. At this time, the limit bar 602 will be adjusted from a flat state to a vertical state, so that the roller 603 faces downward. As the lifting frame 402 descends, the vertical laser welding head 2 and the arc welding head 3 approach the composite wear-resistant steel plate. The roller 603 will first contact the composite wear-resistant steel plate, thereby limiting the laser welding head 2 and the arc welding head 3, leaving a safe welding distance between them and the composite wear-resistant steel plate, preventing the laser welding head 2 and the arc welding head 3 from colliding with the composite wear-resistant steel plate during the descent process.

[0030] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A composite wear-resistant steel plate composite welding device, comprising a flap plate (1), a laser welding head (2) and an arc welding head (3) being fixedly mounted on the front of the flap plate (1), characterized in that: A support frame (4) is arranged above the flip plate (1), an electric push rod (401) is fixedly connected below the support frame (4), a connecting plate (404) is fixedly connected to the lower end of the electric push rod (401), a lifting frame (402) is fixedly connected below the connecting plate (404), a rotating shaft (403) passes through and is rotatably connected to the right side of the lifting frame (402), the rotating shaft (403) passes through and is fixedly connected to the right side of the flip plate (1), a spring telescopic rod (405) and a limit telescopic rod (406) are fixedly connected below the support frame (4), the lower ends of the spring telescopic rod (405) and the limit telescopic rod (406) are fixedly connected to a mounting plate (407), and the lower end of the mounting plate (407) is fixedly connected to a rack. (408), the front face of the rack (408) is meshed with a first gear (409), the first gear (409) is fixedly connected to the right end of the rotating shaft (403), the lower end of the rack (408) is fixedly connected to a top plate (410), a limit plate (411) is arranged above the top plate (410), the limit plate (411) is fixedly connected to the right side of the lifting frame (402), the front face of the lifting frame (402) is fixedly connected to a baffle (412), the front face of the baffle (412) is hinged with a baffle cover (413), the right side of the baffle cover (413) is equipped with a switch assembly (5) for opening the baffle cover (413), and the bottom of the lifting frame (402) is equipped with a limit assembly (6) for preventing the laser welding head (2) from colliding with the steel plate.

2. The composite wear-resistant steel plate composite welding device according to claim 1 is characterized in that: A bottom plate (7) is provided below the laser welding head (2) and the arc welding head (3), and an electric slide rail (8) is fixedly installed above the bottom plate (7).

3. The composite wear-resistant steel plate composite welding device according to claim 2 is characterized in that: A sliding seat (9) is slidably connected to the upper portion of the electric slide rail (8), and the sliding seat (9) is fixedly connected to the lower portion of the support frame (4).

4. The composite wear-resistant steel plate composite welding device according to claim 1, characterized in that: The switch assembly (5) comprises a rotating column (501), the rotating column (501) being fixedly connected to the right side of the baffle (412), a swing bar (502) being fixedly connected above the rotating column (501), an arc-shaped toothed plate (503) being fixedly connected to the upper end of the swing bar (502), a second gear (504) being meshed above the arc-shaped toothed plate (503), the second gear (504) being fixedly connected to the right side of the baffle cover (413), a supporting plate (505) being fixedly connected to the right side of the baffle (412), and a tension spring (506) being elastically connected between the supporting plate (505) and the swing bar (502).

5. The composite wear-resistant steel plate composite welding device according to claim 4, characterized in that: The switch assembly (5) further comprises a push seat (507), wherein the push seat (507) is fixedly connected to the front of the rotating shaft (403), and a lifting rod (508) is fixedly connected to the left side of the push seat (507).

6. The composite wear-resistant steel plate composite welding device according to claim 4, characterized in that: A limit block (509) is provided below the swing bar (502), and the limit block (509) is fixedly connected to the right side of the baffle (412).

7. The composite wear-resistant steel plate composite welding device according to claim 1, characterized in that: The limit assembly (6) comprises a rotating rod (601), the rotating rod (601) penetrates the left and right sides of the lifting frame (402) and is rotatably connected, the outer surface of the rotating rod (601) is fixedly connected to a limit strip (602), the number of the limit strips (602) is two, and opposite sides of the two limit strips (602) are rotatably connected to rollers (603).

8. The composite wear-resistant steel plate composite welding device according to claim 7, characterized in that: The limiting assembly (6) further comprises a third gear (604), wherein the third gear (604) is fixedly connected to the outer surface of the rotating shaft (403), and a fourth gear (605) is meshed below the third gear (604), wherein the fourth gear (605) is fixedly connected to the outer surface of the rotating rod (601).

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