Laser welding equipment suitable for workpieces of different sizes

Abstract

The utility model relates to the technical field of laser welding, in particular to laser welding equipment suitable for workpieces of different sizes, which comprises a workbench, an inner protective cover and an outer protective cover, one side wall of the inner protective cover and one side wall of the outer protective cover are open, and the other side wall of the inner protective cover is open. An upper placing opening and a lower placing opening are formed in the front side wall and the rear side wall of the workbench correspondingly, the bottom wall of the inner protective cover is slidably arranged in the upper placing opening, the bottom wall of the outer protective cover is slidably arranged in the lower placing opening, the opening end of the inner protective cover extends into the outer protective cover, and the top wall and the side wall of the inner protective cover are correspondingly attached to the inner side wall of the outer protective cover in a sliding mode. Steps are arranged at the two ends of the inner side of the bottom wall of the outer protective cover, the top ends of the steps and the ends, close to the workbench, of the steps abut against the bottom wall of the inner protective cover and the side wall of the workbench in a sliding mode, the size of the closed structure can be adjusted by sliding the inner protective cover or the outer protective cover, and workpieces of different sizes can be conveniently placed on the workbench for laser welding.

Description

Technical Field

[0001] This utility model relates to the field of laser welding technology, specifically to a laser welding device suitable for workpieces of different sizes. Background Technology

[0002] Laser welding equipment, also known as laser welding machines or laser welders, is a machine used for laser welding in material processing. Laser welding utilizes high-energy laser pulses to locally heat a small area of ​​the material. The energy of the laser radiation diffuses into the material through heat conduction, melting the material to form a specific molten pool. It is a new type of welding method, mainly for welding thin-walled materials and precision parts. It can achieve spot welding, butt welding, lap welding, and sealing welding, with a high depth-to-width ratio, small weld width, small heat-affected zone, minimal deformation, fast welding speed, smooth and aesthetically pleasing welds, requiring no or only simple post-weld treatment, high weld quality, no porosity, precise control, small focused spot, high positioning accuracy, and easy automation.

[0003] Laser welding also generates waste gas, which includes nitrogen oxides, volatile organic compounds (VOCs), and dust. This waste gas can easily harm the human body when it diffuses into the air. Therefore, laser welding machines are divided into enclosed laser welding machines and open laser welding machines. Enclosed laser welding machines have a protective cover on the outside of the main body of the welding machine. Laser welding is carried out inside the enclosed protective cover, which reduces the harm of waste gas to the human body and also reduces the harm of laser reflection to the human body to a certain extent. The protective cover is connected to a suction fan through a pipeline, which can absorb and treat the waste gas inside the protective cover.

[0004] In related technologies, enclosed laser welding machines improve the safety protection of the human body due to the presence of a protective cover, but at the same time, they limit the size of the workpiece to be welded. This makes it inconvenient for enclosed laser welding machines to weld and process larger workpieces. Therefore, there is an urgent need for a laser welding device that can provide protection while also being able to weld and process larger workpieces. Utility Model Content

[0005] The purpose of this invention is to provide a laser welding equipment suitable for workpieces of different sizes, solving the problem that the existing enclosed laser welding machine is limited in size due to the presence of a protective cover, making it inconvenient to weld larger workpieces.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A laser welding device suitable for workpieces of different sizes includes a worktable with a welding machine body on it, an inner protective cover and an outer protective cover. One side wall of both the inner and outer protective covers is open. The front and rear side walls of the worktable are respectively provided with an upper placement opening and a lower placement opening. The bottom wall of the inner protective cover is slidably placed in the upper placement opening, and the bottom wall of the outer protective cover is slidably placed in the lower placement opening. The open end of the inner protective cover extends into the interior of the outer protective cover. The top and side walls of the inner protective cover are slidably fitted to the inner side wall of the outer protective cover. Steps are provided at both ends of the inner side of the bottom wall of the outer protective cover. The top of the step and the end near the worktable are respectively slidably abutting against the bottom wall of the inner protective cover and the side wall of the worktable, so that the inner and outer protective covers form a closed structure. The upper surface of the worktable and the welding machine body are located within the closed structure.

[0008] A further technical solution is to provide an opening and closing window on the side wall of the inner protective cover away from the outer protective cover.

[0009] A further technical solution is that the workbench is provided with an upper slide groove and a lower slide groove that are connected to the upper and lower placement openings, respectively. The upper slide groove and the lower slide groove are horizontally arranged. An installation chamber is provided in the workbench between the upper slide groove and the lower slide groove. The upper and lower ends of the installation chamber are connected to the lower slide groove and the upper slide groove, respectively. A drive motor is provided in the installation chamber. A gear is sleeved on the output shaft of the drive motor. An upper rack and a lower rack that mesh with the gear are provided in the upper slide groove and the lower slide groove, respectively. The end of the upper rack near the upper placement opening is connected to the bottom wall of the inner protective cover, and the end of the lower rack near the lower placement opening is connected to the bottom wall of the outer protective cover.

[0010] A further technical solution is that the outer protective cover has a vent pipe connected to its interior on the side near the opening window. The end of the vent pipe away from the outer protective cover is connected to an exhaust gas box containing an ethanol solution. The end of the vent pipe away from the outer protective cover is inserted into the exhaust gas box and placed below the surface of the ethanol solution. A suction fan is connected to the vent pipe, and an exhaust port is opened on the top side of the exhaust gas box.

[0011] A further technical solution is that a lower dovetail groove is provided on the top side of the worktable, with both ends horizontally facing the left and right sides of the worktable. The two ends of the lower dovetail groove are open. A tension spring is provided in the lower dovetail groove, and the middle part of the tension spring is fixedly connected to the middle part of the lower dovetail groove. Both ends of the tension spring are connected to dovetail slides that slide in the lower dovetail groove. An upper dovetail groove is provided on the top side of the dovetail slides. A dovetail slider is slidably provided in the upper dovetail groove. A support spring is provided in the upper dovetail groove. The two ends of the support spring are respectively connected to the dovetail slider and the groove wall of the upper dovetail groove away from the axis of the worktable. A clamping plate is connected to the top side of the dovetail slider.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] In this invention, the size of the enclosed structure can be adjusted by sliding the inner or outer protective cover, thus facilitating the placement of workpieces of different sizes on the surface of the worktable inside the enclosed structure. This makes it easier to perform laser welding on larger workpieces. This avoids the problem in related technologies where the size of the protective cover is not adjustable and is usually limited by the size of the worktable. If the size of the protective cover is designed to be too large, it will easily lead to an excessively large laser welding equipment, occupying more space. This also avoids the problem that enclosed laser welding machines are not suitable for welding and processing larger workpieces. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a laser welding equipment applicable to workpieces of different sizes according to the present invention.

[0015] Figure 2 This is a front view of a laser welding equipment suitable for workpieces of different sizes according to this utility model.

[0016] Figure 3 This is a left-side cross-sectional view of a laser welding device suitable for workpieces of different sizes according to this utility model.

[0017] Figure 4 This is a front cross-sectional view of a laser welding equipment suitable for workpieces of different sizes according to this utility model.

[0018] Icons: 1-Workbench, 2-Welding machine body, 3-Inner protective cover, 4-Outer protective cover, 5-Upper placement port, 6-Lower placement port, 7-Step, 8-Opening window, 9-Upper slide rail, 10-Lower slide rail, 11-Installation chamber, 12-Drive motor, 13-Gear, 14-Upper rack, 15-Lower rack, 16-Ventilation pipe, 17-Exhaust gas box, 18-Fan suction fan, 19-Exhaust port, 20-Lower dovetail groove, 21-Tension spring, 22-Dovetail slide bar, 23-Upper dovetail groove, 24-Dovetail slider, 25-Support spring, 26-Clamping plate. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] Example 1

[0021] Reference Figures 1 to 4The present invention discloses a laser welding device suitable for workpieces of different sizes, including a worktable 1, a welding machine body 2 on the worktable 1, an inner protective cover 3 and an outer protective cover 4. One side wall of both the inner protective cover 3 and the outer protective cover 4 is open. The front and rear side walls of the worktable 1 are respectively provided with an upper placement opening 5 and a lower placement opening 6. The bottom wall of the inner protective cover 3 is slidably placed in the upper placement opening 5, and the bottom wall of the outer protective cover 4 is slidably placed in the lower placement opening 6. The open end of the inner protective cover 3 extends into the interior of the outer protective cover 4. The top wall and side wall of the inner protective cover 3 are slidably fitted to the inner side wall of the outer protective cover 4. Steps 7 are provided at both ends of the inner side of the bottom wall of the outer protective cover 4. The top of the step 7 and the end near the worktable 1 are respectively slidably abutting against the bottom wall of the inner protective cover 3 and the side wall of the worktable 1, so that the inner protective cover 3 and the outer protective cover 4 form a closed structure. The upper surface of the worktable 1 and the welding machine body 2 are both located within the closed structure.

[0022] Specifically, by sliding the inner protective cover 3 or the outer protective cover 4, the volume of the enclosed structure can be adjusted, thus facilitating the placement of workpieces of different sizes on the upper surface of the worktable 1 inside the enclosed structure, thereby facilitating laser welding of larger workpieces; avoiding the situation in related technologies where the size of the protective cover cannot be adjusted, and the size of the protective cover is usually limited by the size of the worktable 1, because if the size of the protective cover is designed to be too large, it will easily lead to an excessively large laser welding equipment, which will easily occupy more space, thus avoiding the situation where the enclosed laser welding machine is not convenient for welding and processing larger workpieces.

[0023] Example 2

[0024] Based on the aforementioned Embodiment 1, referring to Figures 1 to 4 As shown, the inner protective cover 3 has an opening window 8 on the side wall away from the outer protective cover 4. By setting the opening window 8, when using the laser welding equipment, the opening window 8 of the inner protective cover 3 or the outer protective cover 4 can be opened, and the workpiece can be placed on the worktable 1 through the window for laser welding.

[0025] Example 3

[0026] Based on the aforementioned Embodiment 2, referring to Figures 1 to 4As shown, the workbench 1 is provided with an upper sliding groove 9 and a lower sliding groove 10 that are connected to the upper placement port 5 and the lower placement port 6, respectively. The upper sliding groove 9 and the lower sliding groove 10 are horizontally arranged. An installation chamber 11 is provided between the upper sliding groove 9 and the lower sliding groove 10 in the workbench 1. The upper and lower ends of the installation chamber 11 are connected to the lower sliding groove 10 and the upper sliding groove 9, respectively. A drive motor 12 is provided in the installation chamber 11. A gear 13 is sleeved on the output shaft of the drive motor 12. An upper rack 14 and a lower rack 15 that mesh with the gear 13 are provided in the upper sliding groove 9 and the lower sliding groove 10, respectively. The end of the upper rack 14 near the upper placement port 5 is connected to the bottom wall of the inner protective cover 3, and the end of the lower rack 15 near the lower placement port 6 is connected to the bottom wall of the outer protective cover 4.

[0027] Specifically, during use, by controlling the rotation direction of the output shaft of the drive motor 12, the gear 13 is driven to rotate, so that the gear 13 meshes with the upper rack 14 and the lower rack 15, which can drive the upper rack 14 and the lower rack 15 to move towards each other or away from each other, thereby adjusting the volume of the closed structure formed by the inner protective cover 3 and the outer protective cover 4, thus facilitating the placement of larger workpieces onto the worktable 1 for laser welding.

[0028] Example 4

[0029] Based on the aforementioned embodiment 3, referring to Figures 1 to 4 As shown, the outer protective cover 4 is provided with a vent pipe 16 connected to the interior of the opening and closing window 8 on the side of the outer protective cover 4. The end of the vent pipe 16 away from the outer protective cover 4 is connected to the exhaust gas box 17, which is filled with ethanol solution. The end of the vent pipe 16 away from the outer protective cover 4 is inserted into the exhaust gas box 17 and placed below the surface of the ethanol solution. A suction fan 18 is connected to the vent pipe 16, and an exhaust port 19 is opened on the top side of the exhaust gas box 17.

[0030] Specifically, during use, the suction fan 18 operates, and through the ventilation pipe 16, the exhaust gas in the enclosed structure is transported to the exhaust gas box 17 below the surface of the ethanol solution. This facilitates the dissolution of most of the nitrogen oxides and volatile organic compounds in the exhaust gas into the ethanol solution, making it easier to treat the exhaust gas and recover nitrogen oxides and volatile organic compounds.

[0031] Example 5

[0032] Based on the aforementioned Embodiment 1, referring to Figures 1 to 4As shown, a lower dovetail groove 20 is provided on the top side of the worktable 1, with both ends horizontally facing the left and right sides of the worktable 1. The two ends of the lower dovetail groove 20 are open. A tension spring 21 is provided in the lower dovetail groove 20. The middle part of the tension spring 21 is fixedly connected to the middle part of the lower dovetail groove 20. Both ends of the tension spring 21 are connected to dovetail slides 22 that are slidably placed in the lower dovetail groove 20. An upper dovetail groove 23 is provided on the top side of the dovetail slides 22. A dovetail slider 24 is slidably provided in the upper dovetail groove 23. A support spring 25 is provided in the upper dovetail groove 23. The two ends of the support spring 25 are respectively connected to the dovetail slider 24 and the side wall of the upper dovetail groove 23 away from the axis of the worktable 1.

[0033] Specifically, in use, when facing a workpiece larger than the worktable 1, pulling the clamping plates 26 away from each other causes the clamping plates 26 to slide along the upper dovetail groove 23, compressing the support spring 25. When the clamping plates 26 slide to their maximum distance along the upper dovetail groove 23, continuing to pull the clamping plates 26 will cause the dovetail slide bar 22 to move away from the center of the worktable 1. The end of the dovetail slide bar 22 away from the center of the worktable 1 can slide out of the lower dovetail groove 20, causing the clamping plates 26 to move out of the upper surface of the worktable 1. At this time, the clamping plates 26 are released, and under the action of the tension spring 21 and the support spring 25, the clamping plates 26 move closer together, thereby clamping and fixing the workpiece larger than the worktable 1. It should be noted that the stiffness coefficient of the tension spring 21 is greater than that of the support spring 25. At the same time, under the action of the tension spring 21, the dovetail slide bar 22 will not completely slide out of the lower dovetail groove 20.

[0034] Although the present invention has been described herein with reference to several illustrative embodiments, it should be understood that many other modifications and implementations can be devised by those skilled in the art, which will fall within the scope and spirit of the principles disclosed herein. More specifically, various variations and modifications can be made to the components and / or layout of the subject matter combination within the scope of the disclosure, drawings, and claims. Besides variations and modifications to the components and / or layout, other uses will be apparent to those skilled in the art.

Claims

1. A laser welding device suitable for workpieces of different sizes, comprising a worktable (1), wherein a welding machine body (2) is provided on the worktable (1), characterized in that: It also includes an inner protective cover (3) and an outer protective cover (4). One side wall of both the inner protective cover (3) and the outer protective cover (4) is open. The front and rear side walls of the workbench (1) are respectively provided with an upper placement opening (5) and a lower placement opening (6). The bottom wall of the inner protective cover (3) is slidably placed in the upper placement opening (5), and the bottom wall of the outer protective cover (4) is slidably placed in the lower placement opening (6). The open end of the inner protective cover (3) extends into the interior of the outer protective cover (4). The top and side walls of the protective cover (3) are slidably fitted to the inner side wall of the outer protective cover (4). The bottom wall of the outer protective cover (4) has steps (7) at both ends. The top of the step (7) and the end near the workbench (1) slide against the bottom wall of the inner protective cover (3) and the side wall of the workbench (1) respectively, so that the inner protective cover (3) and the outer protective cover (4) form a closed structure. The upper surface of the workbench (1) and the welding machine body (2) are both located within the closed structure.

2. The laser welding equipment applicable to workpieces of different sizes according to claim 1, characterized in that: The inner protective cover (3) has an opening and closing window (8) on the side wall away from the outer protective cover (4).

3. The laser welding equipment applicable to workpieces of different sizes according to claim 2, characterized in that: The workbench (1) is provided with an upper sliding groove (9) and a lower sliding groove (10) that communicate with the upper placement port (5) and the lower placement port (6), respectively. The upper sliding groove (9) and the lower sliding groove (10) are horizontally arranged. An installation chamber (11) is provided in the workbench (1) between the upper sliding groove (9) and the lower sliding groove (10). The upper and lower ends of the installation chamber (11) are respectively connected to the lower sliding groove (10) and the upper sliding groove (9). The installation chamber (11) is provided with A drive motor (12) is provided with a gear (13) on its output shaft. An upper rack (14) and a lower rack (15) that mesh with the gear (13) are respectively provided in the upper slide groove (9) and the lower slide groove (10). The upper rack (14) is connected to the bottom wall of the inner protective cover (3) at one end near the upper placement opening (5), and the lower rack (15) is connected to the bottom wall of the outer protective cover (4) at one end near the lower placement opening (6).

4. The laser welding equipment applicable to workpieces of different sizes according to claim 3, characterized in that: The outer protective cover (4) is provided with a ventilation pipe (16) connected to the interior of the opening and closing window (8) on the side of the outer protective cover (4). The end of the ventilation pipe (16) away from the outer protective cover (4) is connected to a waste gas box (17). The waste gas box (17) is filled with ethanol solution. The end of the ventilation pipe (16) away from the outer protective cover (4) is inserted into the waste gas box (17) and placed below the surface of the ethanol solution. A suction fan (18) is connected to the ventilation pipe (16). An air outlet (19) is opened on the top side of the waste gas box (17).

5. The laser welding equipment applicable to workpieces of different sizes according to claim 1, characterized in that: The top side of the workbench (1) is provided with a lower dovetail groove (20) with both ends horizontally facing the left and right sides of the workbench (1). The two ends of the lower dovetail groove (20) are open. A tension spring (21) is provided in the lower dovetail groove (20). The middle part of the tension spring (21) is fixedly connected to the middle part of the lower dovetail groove (20). Both ends of the tension spring (21) are connected to dovetail slides (22) that slide in the lower dovetail groove (20). An upper dovetail groove (23) is provided on the top side of the dovetail slides (22). A dovetail slider (24) is slidably provided in the upper dovetail groove (23). A support spring (25) is provided in the upper dovetail groove (23). The two ends of the support spring (25) are respectively connected to the dovetail slider (24) and the side wall of the upper dovetail groove (23) away from the axis of the workbench (1). A clamp (26) is connected to the top side of the dovetail slider (24).

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