Workpiece clamping device of laser welding machine

Abstract

The utility model relates to the field of laser welding, discloses a workpiece clamping device of a laser welding machine, and solves the problem that the conventional workpiece clamping device of the laser welding machine is poor in special-shaped clamping and fixing fitting degree effect. The two-way motor drives the screw rod to be in threaded connection with the movable ring, the movable frames on the two sides drive the clamping plates to accurately clamp workpieces, the fixing structure comprises the flitch, the spring and the adjusting plate assembly and can flexibly adapt to different side slopes of the special-shaped workpieces, the contact face is enlarged, and the clamping stability is remarkably improved; dust on the surface of the workpiece is automatically removed in the clamping process, the welding quality is improved, the production efficiency is improved, and the reliability of the welding quality is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of laser welding, in particular to a workpiece clamping device for a laser welding machine. Background Technique

[0002] A laser welding machine uses a high-energy laser beam to irradiate the surface of a workpiece. By precisely controlling the position and energy of the laser beam, precise welding at the micron level can be achieved. This high precision requires the workpiece to maintain extremely high stability and position accuracy during the welding process. The laser welding speed is fast, and a large number of welding operations can be completed in a short time, improving production efficiency. Therefore, the workpiece clamping device needs to be able to respond quickly to ensure that the workpiece does not move or deform during high-speed welding.

[0003] For example, in the patent with the publication number CN213888743U, threaded rods are installed on both sides of the workbench through first bearings. One end of the threaded rod is provided with a rotating block, and a limiting frame is arranged directly above the threaded rod. The limiting frame is fixedly installed on both sides of the workbench. The threaded rod is connected to the bottom of the moving frame through threads. This fiber laser welding machine with workpiece clamping can stably clamp the workpiece on the workbench, can clamp workpieces of different heights, and can also adjust the height of the workbench according to needs. Moreover, the adjustment of the height and the clamping of the workpiece are very convenient, making it more convenient for the user to perform welding operations.

[0004] The above patent fixes the workpiece through a clamping plate, but there are easily problems in the operation process: due to the complex and variable shapes of special-shaped workpieces, traditional clamping plates are difficult to fully fit the surface of the workpiece, resulting in uneven distribution of the clamping force, which in turn affects the welding quality and stability. A low degree of fit means that the contact area between the clamping plate and the workpiece is reduced, thereby reducing the clamping force. During laser welding, this weakened clamping force may not be able to effectively resist the thermal stress and mechanical stress generated during welding, resulting in workpiece displacement or deformation. Content of the Utility Model

[0005] The purpose of the utility model is to provide a workpiece clamping device for a laser welding machine. By using this device for work, the problem of poor clamping and fixing fit for special-shaped workpieces in the existing workpiece clamping device for a laser welding machine is solved.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A workpiece clamping device for a laser welding machine, including a workbench. A bidirectional motor is embedded in the workbench. Threaded rods are arranged at both ends of the bidirectional motor. A moving ring is threadedly connected to the surface of the threaded rod. A moving frame is arranged at the top of the moving ring. A clamping plate is arranged on one side of the moving frame. A fixing structure for high clamping and fixing fit of special-shaped workpieces is arranged on one side of the clamping plate. An air blowing structure for dust removal on the surface of the workpiece is also arranged on one side of the clamping plate.

[0007] The fixing structure includes fixing blocks arranged on one side of the clamping plate. Cylinders are arranged on both sides of the fixing blocks. Adjusting plates are rotatably connected to both sides of the cylinders. Connecting blocks are arranged at both ends of the adjusting plates. One end of the connecting block is rotatably connected to a rotating shaft. A swinging block is arranged at the outer end of the rotating shaft. A telescopic rod is arranged on one side of the swinging block. A spring is sleeved on the outer end of the telescopic rod. A sticking plate is arranged at the end of the telescopic rod away from the swinging block.

[0008] Furthermore, the adjacent ends of the two groups of adjusting plates are movably connected, and connecting blocks are arranged on one side of the two groups of adjusting plates.

[0009] Furthermore, three groups of the connecting blocks, rotating shafts and swinging blocks are respectively arranged at equal intervals. Two of the groups of connecting blocks are connected to one group of adjusting plates, and the other group of connecting blocks is connected to the other group of adjusting plates. The three groups of rotating shafts respectively correspond to the connecting blocks one by one. Six groups of the telescopic rods, springs and sticking plates are respectively arranged at equal intervals. Every two groups of the telescopic rods and springs are respectively connected to one group of swinging blocks. The six groups of sticking plates are used for clamping and fixing the special-shaped workpiece.

[0010] Furthermore, the air blowing structure includes a long plate arranged at the bottom end of the clamping plate. An airbag is arranged on one side of the long plate. One side of the airbag is flush with the sticking plate.

[0011] Furthermore, one end of the airbag is connected to an air inlet pipe, and a valve body is arranged at one end of the air inlet pipe.

[0012] Furthermore, compression springs are arranged inside the airbag. Two groups of compression springs are symmetrically arranged, and the compression springs are used for the reset of the airbag.

[0013] Furthermore, a trachea is connected to the side of the airbag close to the long plate. Pipe grooves are formed on the surfaces of the long plate and the clamping plate, and the pipe grooves of the long plate and the clamping plate are communicated with each other.

[0014] Furthermore, the trachea is U-shaped. The trachea penetrates through the pipe grooves of the long plate and the clamping plate that are communicated with each other. A blowing head is arranged at one end of the trachea. Multiple groups of the trachea and the blowing heads are arranged at equal intervals, and the multiple groups of trachea and the blowing heads face the workpiece.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] A workpiece clamping device for a laser welding machine proposed by the present utility model. The existing workpiece clamping device for a laser welding machine has poor fitting effect for clamping and fixing special-shaped workpieces. The present utility model realizes the precise clamping of the workpiece by the clamping plates driven by the moving frames on both sides through the threaded connection between the lead screw and the moving ring driven by a bidirectional motor. The fixing structure includes a attaching plate, a spring, and an adjusting plate assembly, which can flexibly adapt to the different side slopes of special-shaped workpieces, expand the contact surface, and significantly improve the clamping stability. Through the airbag and the air pipe, the dust on the surface of the workpiece is automatically removed during the clamping process, improving the welding quality. It not only improves the production efficiency but also ensures the reliability of the welding quality. Brief Description of the Drawings

[0017] Figure 1 It is a schematic three-dimensional structure diagram of the whole of the present utility model;

[0018] Figure 2 It is a schematic three-dimensional sectional structure diagram of the whole of the present utility model;

[0019] Figure 3 It is a schematic three-dimensional structure diagram of the fixing structure of the present utility model;

[0020] Figure 4 It is a schematic three-dimensional perspective structure diagram of the air blowing structure of the present utility model.

[0021] In the figure: 1, workbench; 2, bidirectional motor; 3, lead screw; 4, moving ring; 5, moving frame; 6, clamping plate; 7, fixing structure; 71, fixing block; 72, cylinder; 73, adjusting plate; 74, connecting block; 75, rotating shaft; 76, swinging block; 77, telescopic rod; 78, spring; 79, attaching plate; 8, air blowing structure; 81, long plate; 82, airbag; 83, compression spring; 84, intake pipe; 85, valve body; 86, air pipe; 87, pipe groove. Detailed Description of the Preferred Embodiments

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] To further understand the content of the present utility model, the present utility model will be described in detail in conjunction with the accompanying drawings.

[0024] Combined with Figures 1 - 4, A workpiece clamping device for a laser welding machine, comprising a workbench 1. A bidirectional motor 2 is embedded inside the workbench 1. Lead screws 3 are arranged at both ends of the bidirectional motor 2. A moving ring 4 is threadedly connected to the surface of the lead screw 3. A moving frame 5 is arranged at the top of the moving ring 4. A clamping plate 6 is arranged on one side of the moving frame 5. A fixing structure 7 for highly clamping and fixing a special-shaped workpiece with high fitting degree is arranged on one side of the clamping plate 6. An air blowing structure 8 for removing dust from the surface of the workpiece is also arranged on one side of the clamping plate 6.

[0025] The following further describes the present utility model in conjunction with embodiments.

[0026] Embodiment 1:

[0027] Please refer to Figures 1 - 4 , The fixing structure 7 includes fixing blocks 71 arranged on one side of the clamping plate 6. Cylinders 72 are arranged on both sides of the fixing blocks 71. Adjusting plates 73 are rotatably connected to both sides of the cylinders 72. Connection blocks 74 are arranged at both ends of the adjusting plates 73. One end of the connection block 74 is rotatably connected to a rotating shaft 75. A swinging block 76 is arranged at the outer end of the rotating shaft 75. A telescopic rod 77 is arranged on one side of the swinging block 76. A spring 78 is sleeved on the outer end of the telescopic rod 77. A sticking plate 79 is arranged at the end of the telescopic rod 77 away from the swinging block 76. Two groups of the fixing blocks 71, cylinders 72 and adjusting plates 73 are symmetrically arranged with respect to the clamping plate 6. The closer ends of the two groups of adjusting plates 73 are movably connected. Connection blocks 74 are arranged on one side of the two groups of adjusting plates 73. Three groups of the connection blocks 74, rotating shafts 75 and swinging blocks 76 are respectively arranged at equal intervals. Two of the three groups of connection blocks 74 are connected to one group of adjusting plates 73, and the other group of connection blocks 74 are connected to the other group of adjusting plates 73. The three groups of rotating shafts 75 respectively correspond to the connection blocks 74 one by one. Six groups of the telescopic rods 77, springs 78 and sticking plates 79 are respectively arranged at equal intervals. Every two groups of the telescopic rods 77 and springs 78 are respectively connected to one group of swinging blocks 76. The six groups of sticking plates 79 are used for clamping and fixing the special-shaped workpiece to improve the stability of fixing.

[0028] The air-blowing structure 8 includes a long plate 81 provided at the bottom end of the clamping plate 6. One side of the long plate 81 is provided with an airbag 82. One side of the airbag 82 is flush with the attaching plate 79. One end of the airbag 82 is connected to an air inlet pipe 84. One end of the air inlet pipe 84 is provided with a valve body 85. A compression spring 83 is arranged inside the airbag 82. There are two groups of compression springs 83 arranged symmetrically. The compression spring 83 is used for the reset of the airbag 82. One side of the airbag 82 close to the long plate 81 is connected to an air pipe 86. Pipe grooves 87 are formed on the surfaces of the long plate 81 and the clamping plate 6. The pipe grooves 87 of the long plate 81 and the clamping plate 6 are communicated with each other. The air pipe 86 is U-shaped. The air pipe 86 penetrates through the pipe grooves 87 where the long plate 81 and the clamping plate 6 are penetrated and communicated. One end of the air pipe 86 is provided with a blowing head. There are multiple groups of the air pipes 86 and the blowing heads arranged at equal intervals. The multiple groups of air pipes 86 and the blowing heads face the workpiece. The gas blown out by the multiple groups of blowing heads clears the dust on the surface of the workpiece, improving the welding quality.

[0029] Specifically, first, the workpiece is placed in the middle of the workbench 1 through an external feeding structure, and then the two-way motor 2 embedded in the workbench 1 is driven by an external button manually. The two-way motor 2 drives the lead screws 3 at both ends to be threadedly connected with the moving rings 4 on the surface. One ends of the two lead screws 3 away from the two-way motor 2 are respectively rotationally connected to the extension plates. The extension plates are fixedly connected to the workbench 1. The two moving rings 4 drive the moving frames 5 at the top to approach the workpiece respectively. One end of the moving frame 5 slides in the limiting frames provided at both ends of the workbench 1. Thus, the two moving frames 5 drive the clamping plates 6 at each end to clamp the side surface of the workpiece. As the clamping plate 6 contacts the side surface of the workpiece, since a fixing structure 7 is provided on one side of the clamping plate 6, the attaching plate 79 first contacts the side surface of the workpiece. The attaching plate 79 is extruded by different slopes on the side surface of the special-shaped workpiece, causing the attaching plate 79 to drive the telescopic rod 77 to move. A spring 78 is sleeved on the surface of the telescopic rod 77. The spring 78 is used for reset. The swing block 76 at one end of the telescopic rod 77 rotates an angle through the rotating shaft 75. At the same time, the extrusion force causes the adjusting plate 73 to adjust the inclination angle through the cylinder 72 connected by rotation. The cylinder 72 is fixed to the clamping plate 6 through the fixing block 71. There are two groups of adjusting plates 73. One end of one group of adjusting plates 73 is located at the position between the other group of adjusting plates 73 and the clamping plate (6). Thus, the two groups of adjusting plates 73 cooperate with each other, and together with the attaching plate 79, they further fit the side surface of the workpiece. There are a total of six groups of attaching plates 79 arranged at equal intervals. Every two groups of attaching plates 79 adjust the angle of the swing block 76 through a group of rotating shafts 75. The rotating shaft 75 is rotationally connected to the connecting block 74. The connecting block 74 is connected to the adjusting plate 73, better expanding the contact surface of the side surface of the special-shaped workpiece and improving the fixing stability.

[0030] Since one side of the airbag 82 is flush with the attaching plate 79, when the workpiece presses against the attaching plate 79, the airbag 82 will also be squeezed. The compression spring 83 inside the airbag 82 is squeezed and stores energy. The squeezing of the airbag 82 causes the internal gas to be output through a plurality of connected air pipes 86. The air pipes 86 are U-shaped. Pipe grooves 87 are formed on the surfaces of the long plate 81 and the clamping plate 6. The pipe grooves 87 of the long plate 81 and the clamping plate 6 are connected. The air pipes 86 pass through the long plate 81 and the clamping plate 6 and pass through the connected pipe grooves 87. A blowing head is provided at one end of the air pipe 86. A plurality of groups of air pipes 86 and blowing heads are arranged at equal intervals. The plurality of groups of air pipes 86 and blowing heads face the workpiece. Thus, the gas blown out by the plurality of blowing heads removes the dust on the surface of the workpiece, improving the welding quality. After the workpiece is welded, the attaching plate 79 moves away from the workpiece, and the airbag 82 is not squeezed. The airbag 82 is reset by the compression spring 83. At this time, by opening the valve body 85, gas can be input into the interior of the airbag 82 through the air inlet pipe 84 until it is full, waiting for the next use.

[0031] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0032] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A workpiece clamping device for a laser welding machine, comprising a workbench (1). A bidirectional motor (2) is embedded inside the workbench (1). Lead screws (3) are arranged at both ends of the bidirectional motor (2). A moving ring (4) is threadedly connected to the surface of the lead screws (3). A moving frame (5) is arranged at the top of the moving ring (4). A clamping plate (6) is arranged on one side of the moving frame (5), characterized in that: One side of the clamping plate (6) is provided with a fixing structure (7) for highly fitting and fixing the special-shaped workpiece, and one side of the clamping plate (6) is also provided with an air blowing structure (8) for removing dust from the surface of the workpiece; The fixing structure (7) includes a fixing block (71) arranged on one side of the clamping plate (6). Cylinders (72) are arranged on both sides of the fixing block (71). Adjusting plates (73) are rotatably connected to both sides of the cylinders (72). Connecting blocks (74) are arranged at both ends of the adjusting plates (73). One end of the connecting block (74) is rotatably connected to a rotating shaft (75). A swinging block (76) is arranged at the outer end of the rotating shaft (75). A telescopic rod (77) is arranged on one side of the swinging block (76). A spring (78) is sleeved on the outer end of the telescopic rod (77). A sticking plate (79) is arranged at the end of the telescopic rod (77) away from the swinging block (76).

2. The workpiece clamping device of a laser welding machine according to claim 1, characterized in that: Two groups of the fixing block (71), the cylinders (72) and the adjusting plates (73) are symmetrically arranged with respect to the clamping plate (6). The closer ends of the two groups of adjusting plates (73) are movably connected. Connecting blocks (74) are arranged on one side of the two groups of adjusting plates (73).

3. The workpiece clamping device of a laser welding machine according to claim 2, characterized in that: Three groups of the connecting blocks (74), the rotating shafts (75) and the swinging blocks (76) are respectively arranged at equal intervals. Two of the groups of connecting blocks (74) are connected to one of the groups of adjusting plates (73), and the other group of connecting blocks (74) is connected to the other group of adjusting plates (73). The three groups of rotating shafts (75) respectively correspond to the connecting blocks (74). Six groups of the telescopic rods (77), the springs (78) and the sticking plates (79) are respectively arranged at equal intervals. Every two groups of the telescopic rods (77) and the springs (78) are respectively connected to one group of the swinging blocks (76). The six groups of sticking plates (79) are used for clamping and fixing the special-shaped workpiece.

4. A workpiece clamping device for a laser welding machine according to claim 1, characterized in that: The air blowing structure (8) includes a long plate (81) arranged at the bottom end of the clamping plate (6). An airbag (82) is arranged on one side of the long plate (81). One side of the airbag (82) is flush with the sticking plate (79).

5. The workpiece clamping device of a laser welding machine according to claim 4, characterized in that: One end of the airbag (82) is connected to an air inlet pipe (84). A valve body (85) is arranged at one end of the air inlet pipe (84).

6. The workpiece clamping device of a laser welding machine according to claim 5, wherein: Two groups of compression springs (83) are symmetrically arranged inside the airbag (82). The compression springs (83) are used for the reset of the airbag (82).

7. The workpiece clamping device of a laser welding machine according to claim 6, characterized in that: One side of the airbag (82) close to the long plate (81) is connected to an air pipe (86). Pipe grooves (87) are formed on the surfaces of the long plate (81) and the clamping plate (6). The pipe grooves (87) of the long plate (81) and the clamping plate (6) are communicated.

8. The workpiece clamping device of a laser welding machine according to claim 6, characterized in that: The air pipe (86) is U-shaped. The air pipe (86) penetrates through the pipe grooves (87) of the long plate (81) and the clamping plate (6) which are communicated. A blowing head is arranged at one end of the air pipe (86). Multiple groups of the air pipes (86) and the blowing heads are arranged at equal intervals. The multiple groups of the air pipes (86) and the blowing heads face the workpiece.

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