Mechanical product multi-station laser welding machine

Abstract

The present application relates to the field of laser welding, especially to a mechanical product multi-station laser welding machine. The mechanical product multi-station laser welding machine comprises a workbench, a laser, a three-axis module, an inclination mechanism, a laser head, a feeding mechanism and the like; the workbench is internally provided with the laser, the top of the workbench is provided with the three-axis module, the laser head is installed on the three-axis module through the inclination mechanism, and the laser head can adjust the pitch angle under the action of the inclination mechanism. Through the clamping piece, in the process of clamping the workpiece, when one small semicircular block contacts the workpiece, the large semicircular block and the middle semicircular block will automatically rotate until the other small semicircular block contacts the workpiece, and then the large semicircular block and the middle semicircular block stop rotating, so that each small semicircular block clamps the workpiece, so that the workpiece can be fixed more stably, and the fixation of workpieces with different shapes can be adapted.

Description

Technical Field

[0001] This invention relates to the field of laser welding, and more particularly to a multi-station laser welding machine for mechanical products. Background Technology

[0002] Laser welding, as a highly efficient and precise joining process, has been widely used in many fields such as machinery manufacturing, automotive parts, aerospace and electronics due to its significant advantages such as high energy density, small heat-affected zone, fast welding speed and large weld depth-to-width ratio.

[0003] However, existing multi-station laser welding equipment still has significant technical limitations when dealing with complex mechanical products. Most mainstream multi-station welding equipment currently employs a traditional three-axis (X, Y, Z) linear motion control mode, with the laser welding head typically rigidly fixed to a Z-axis slide, or possessing only limited fixed-angle adjustment capabilities, resulting in low degrees of freedom. This structure performs well with planar workpieces or regular straight weld seams, but when handling mechanical products with complex curved surfaces, irregular structures, or requiring specific angles of incidence, the following main problems are exposed: First, when welding curved surfaces or inclined welds, fixed or low-degree-of-freedom laser heads cannot adjust their posture in real time to follow the changes in the normal direction of the workpiece surface, causing the laser beam to be unable to remain perpendicular to the welding surface. When the laser beam is not perpendicular to the welding surface (i.e., there is a large tilt angle), the reflectivity of the laser energy on the workpiece surface will increase significantly, and the effectively absorbed energy will decrease, directly leading to insufficient penetration, poor weld formation, and defects such as undercut or lack of fusion.

[0004] Secondly, for certain mechanical products with special structures, the process requires oblique welding to meet stress requirements or avoid interference areas. Traditional three-axis devices, lacking flexible angle adjustment mechanisms, struggle to achieve high-quality oblique welding. They often rely on complex and expensive specialized tooling fixtures to forcibly change the workpiece's orientation, which not only increases equipment costs and changeover time but also reduces production flexibility.

[0005] Therefore, there is an urgent need to develop a multi-station laser welding machine that can flexibly adjust the posture of the laser head and the workpiece. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, the present invention provides a multi-station laser welding machine for mechanical products that can flexibly adjust the posture of the laser head and the workpiece.

[0007] The technical implementation scheme of the present invention is as follows: a multi-station laser welding machine for mechanical products, comprising a worktable, a laser, a three-axis module, a tilting mechanism, a laser head, a loading mechanism, a fixture, and a unloading plate. The laser is installed inside the worktable, and the three-axis module is installed on the top of the worktable. The laser head is installed on the three-axis module through the tilting mechanism. The laser head can adjust its pitch angle under the action of the tilting mechanism. The loading mechanism, fixture, and unloading plate are provided on the top of the worktable below the laser head. The unloading plate is installed at an downward tilt, and the fixture can drive the workpiece to rotate horizontally.

[0008] In a preferred embodiment of the present invention, the three-axis module includes an X module horizontally mounted on the top of the worktable, a Z module vertically fixed on the slide plate of the X module, and a Y module horizontally fixed on the slide plate of the Z module.

[0009] In a preferred embodiment of the present invention, the tilting mechanism includes an extension plate mounted on the Y-module slide plate. The extension plate is mounted parallel to the Y-module. The extension plate and the Y-module slide plate have symmetrically formed waist-shaped holes at their overlapping positions. Fastening bolts pass through the waist-shaped holes and are screwed into the Y-module slide plate. A first motor is fixedly connected to the side of the extension plate. A worm gear is connected to the output shaft of the first motor. A worm wheel that meshes with the worm gear is rotatably mounted on the extension plate. An adapter seat is fixed to the side of the worm wheel. The laser head is detachably fixedly mounted on the adapter seat.

[0010] In a preferred embodiment of the present invention, the feeding mechanism includes a support base on the top of the workbench, a feeding channel is installed on the top of the support base via an electric rail, a rodless cylinder is embedded in the feeding channel along its extension direction, and a push plate is installed on the sliding plate of the rodless cylinder.

[0011] In a preferred embodiment of the present invention, the clamp includes a rotating seat rotatably mounted on the top of the worktable. The rotating seat is located at the end of the material conveying channel. A placement plate is mounted on the top of the rotating seat. One side of the top of the placement plate is a fixed boss, and the other side is a sliding boss. A slider is slidably arranged in the middle of the fixed boss. A first cylinder is provided at the bottom of both the slider and the sliding boss. A pressure claw is connected to the telescopic end of the top of the first cylinder. A hydraulic rod is fixedly connected to the placement plate at both the fixed boss and the sliding boss. The telescopic end of the hydraulic rod is connected to the adjacent slider and the sliding boss. Clamping members are symmetrically arranged on the inner sides of both the fixed boss and the sliding boss. A limiting member is provided at the material discharge point of the placement plate. A rotating member is provided on the worktable below the rotating seat.

[0012] In a preferred embodiment of the present invention, the clamping member includes a large semicircular block, a medium semicircular block, and a small semicircular block. The large semicircular block is symmetrically rotated on the inner surfaces of both the fixed boss and the sliding boss. The medium semicircular block is symmetrically rotated on the vertical plane of the large semicircular block. The small semicircular block is symmetrically rotated on the vertical plane of the medium semicircular block. The vertical plane of the small semicircular block is toothed.

[0013] In a preferred embodiment of the present invention, the limiting member includes a second cylinder fixed below the discharge port of the placement tray, the telescopic end of the second cylinder is connected to a connecting plate, and the top of the connecting plate is symmetrically provided with baffles, the baffles extending upward through the placement tray.

[0014] In a preferred embodiment of the present invention, the rotating component includes a second motor installed in the workbench, and the second motor and the rotating seat are driven by a transmission component.

[0015] In a preferred embodiment of the present invention, a protective structure is further included, which is a protective cover fixed to the top of the workbench.

[0016] In a preferred embodiment of the present invention, a dust suction pipe is provided on the protective cover at the discharge end, and an air blowing structure is installed on the protective cover at the feed end. The air blowing structure has a movable function to achieve comprehensive removal of impurities.

[0017] Beneficial effects: This invention, through the clamping components, allows the larger and middle semicircular blocks to automatically rotate when one of the smaller semicircular blocks contacts the workpiece during the clamping process. This rotation continues until the other smaller semicircular block contacts the workpiece, at which point the larger and middle semicircular blocks stop rotating. In this way, each smaller semicircular block clamps the workpiece, resulting in more stable workpiece fixation and adaptability to workpieces of different shapes. Through the cooperation of the tilting mechanism and the rotating component, the tilting mechanism can adjust the laser head angle, and the rotating component can rotate the workpiece horizontally, ensuring the laser beam is perpendicular to the workpiece welding surface, achieving high-quality oblique welding. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 This is a three-dimensional structural schematic diagram from another perspective of the present invention.

[0020] Figure 3 This is a three-dimensional structural diagram of the three-axis module of the present invention.

[0021] Figure 4 This is a three-dimensional structural diagram of the tilting mechanism of the present invention.

[0022] Figure 5This is a three-dimensional structural diagram of the feeding mechanism of the present invention.

[0023] Figure 6 This is a three-dimensional structural diagram of the feeding mechanism of the present invention.

[0024] Figure 7 This is a three-dimensional structural schematic diagram of the feeding mechanism of the present invention from another perspective.

[0025] Figure 8 This is a three-dimensional structural diagram of the placement disk and boss of the present invention.

[0026] Figure 9 This is a three-dimensional structural diagram of the component placed on the disc in this invention.

[0027] Figure 10 This is a three-dimensional structural diagram of the limiting component of the present invention.

[0028] Figure 11 This is a three-dimensional structural diagram of the rotating component of the present invention.

[0029] Figure 12 This is a three-dimensional structural diagram of the protective structure of the present invention.

[0030] Figure 13 This is a three-dimensional structural diagram of the air blowing structure of the present invention. The components are: 1-Workbench, 2-Laser, 3-Three-axis module, 31-X module, 32-Z module, 33-Y module, 4-Tilting mechanism, 41-Extension plate, 42-Oval hole, 43-Fasting bolt, 44-First motor, 45-Worm gear, 46-Worm wheel, 47-Adapter, 5-Laser head, 6-Feeding mechanism, 61-Support base, 62-Electric track, 63-Feeding channel, 64-Rodless cylinder, 65-Push plate, 7-Clamping device, 71-Rotating seat, 72-Placing plate, 73-Boss, 74-Slider, 75-First cylinder, 76-... - Hydraulic rod, 77- Pressure claw, A- Clamping component, 78- Large semi-circular block, 79- Medium semi-circular block, 710- Small semi-circular block, B- Limiting component, 711- Second cylinder, 712- Connecting plate, 713- Stop bar, C- Rotating component, 714- Second motor, 715- Transmission component, 8- Feeding plate, 9- Protective structure, 91- Protective cover, 92- Dust suction pipe, 93- Air blowing structure, 931- L-shaped extension rod, 932- Protrusion, 933- Slide rail, 934- Sliding mounting plate, 935- Nozzle, 936- Spring, 937- L-shaped top rod. Detailed Implementation

[0031] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0032] Example: A multi-station laser welding machine for mechanical products, such as Figures 1-11As shown, the system includes a worktable 1, a laser 2, a three-axis module 3, a tilting mechanism 4, a laser head 5, a loading mechanism 6, a fixture 7, and a unloading plate 8. The laser 2, a 1500W fiber laser, is installed inside the worktable 1. The three-axis module 3, comprising an X-module 31, a Z-module 32, and a Y-module 33, is installed on the rear top of the worktable 1. The X-module 31 extends horizontally to the left and right sides of the rear top of the worktable 1. The X-module 31 has a sliding mechanism... A Z module 32 is vertically fixed on the plate. A Y module 33 is horizontally fixed on the slide plate of the Z module 32. A laser head 5 is installed on the slide plate of the Y module 33 through a tilting mechanism 4. The laser head 5 can swing back and forth to change its angle under the action of the tilting mechanism 4. From right to left, the top of the worktable 1 below the laser head 5 is provided with a feeding mechanism 6, a clamp 7 and a unloading plate 8. The unloading plate 8 is installed at an angle downward to facilitate the discharge of the workpiece. The clamp 7 can drive the workpiece to rotate horizontally.

[0033] A multi-station laser welding machine for mechanical products: When welding workpieces, the workpiece to be welded is first placed on the feeding mechanism 6, which transports the workpiece to the fixture 7. The fixture 7 clamps and positions the workpiece. Then, the laser 2 is controlled to start working, and the three-axis module 3 changes the position of the laser head 5 to perform laser welding on the workpiece. During the laser welding process, if the welding surface of the workpiece is inclined, the tilting mechanism 4 drives the laser head 5 to tilt, so that the laser head 5 is perpendicular to the welding surface of the workpiece for welding. At the same time, the fixture 7 can also drive the workpiece to rotate horizontally, thereby changing the position of the workpiece to facilitate welding. After the workpiece is welded, the next workpiece moves to the fixture 7, and the welded workpiece falls onto the unloading plate 8 for unloading.

[0034] like Figure 4As shown, the tilting mechanism 4 includes an extension plate 41, fastening bolts 43, a first motor 44, a worm gear 45, a worm wheel 46, and an adapter 47. The extension plate 41 extends forward and backward on the Y-module 33 slide plate, and is installed parallel to the Y-module 33. Symmetrical forward and backward extending oblong holes 42 are provided at the overlapping positions of the extension plate 41 and the Y-module 33 slide plate. The fastening bolts 43 pass through the oblong holes 42 and are screwed into the Y-module 33 slide plate, fixing the extension plate 41 to the Y-module 33 slide plate. Simultaneously, the fastening bolts 43 can be loosened, allowing the extension plate 41 to slide forward and backward to adjust its position, thereby changing the position of the laser head 5 and altering the welding range of the laser head 5. A first motor 44 is fixedly connected to the side of the laser head 5. A worm gear 45 is connected to the output shaft at the front end of the first motor 44. A worm wheel 46 that meshes with the worm gear 45 is rotatably mounted on the extension plate 41. An adapter 47 is fixed to the left side of the worm wheel 46. The laser head 5 is detachably fixedly mounted on the adapter 47. During the welding process, if tilted welding is required, the first motor 44 is controlled to rotate forward and backward, which in turn drives the worm gear 45 to rotate forward and backward, thereby driving the worm wheel 46 to rotate forward and backward, causing the adapter 47 and the laser head 5 to swing back and forth. When the laser head 5 swings to the required angle, the first motor 44 is controlled to stop working. At this time, the laser head 5 is moved by the three-axis module 3 to perform the welding operation.

[0035] like Figure 5 As shown, the feeding mechanism 6 includes a support base 61, an electric track 62, a feeding channel 63, a rodless cylinder 64, and a push plate 65. The support base 61 is symmetrically arranged on the front and back of the top right side of the worktable 1. The feeding channel 63 is installed on the top of the support base 61 through the electric track 62. Under the action of the electric track 62, when the fixture 7 drives the workpiece to rotate, the feeding channel 63 can move to the right under the action of the electric track 62 in order to avoid the fixture 7. During feeding, the electric track 62 drives the feeding channel 63 to move to the left and reset. The rodless cylinder 64 is symmetrically arranged on the feeding channel 63 along its extension direction. The push plate 65 is installed on the sliding plate of the rodless cylinder 64. The workpiece to be welded is placed on the left side of the push plate 65. Then, the push plate 65 is moved to the left by the rodless cylinder 64, which in turn moves the workpiece to the left onto the fixture 7. Then, the push plate 65 is moved to the right and reset by the rodless cylinder 64.

[0036] like Figures 6-11As shown, the fixture 7 includes a rotating seat 71, a placement plate 72, a boss 73, a slider 74, a first cylinder 75, a hydraulic rod 76, a pressure claw 77, a clamping component A, a limiting component B, and a rotating component C. The rotating seat 71 is rotatably mounted on the top of the worktable 1 via a bearing seat. The rotating seat 71 is located at the left end of the material conveying channel 63. The placement plate 72 is mounted on the top of the rotating seat 71. The front side of the top of the placement plate 72 is a fixed boss 73, and the rear side of the top of the placement plate 72 is a sliding boss 73. The slider 74 is slidably mounted on the middle of the fixed boss 73. The bottom of both the slider 74 and the sliding boss 73 is equipped with a first cylinder 75. The telescopic ends of the top of the first cylinder 75 are connected to pressure claws 77. The cylinder 75 drives the pressure claw 77 to move up and down, fixing the workpiece vertically. Hydraulic rods 76 are fixed to the placement plate 72 at both the fixed boss 73 and the sliding boss 73. The telescopic end of the hydraulic rod 76 is connected to the adjacent slider 74 and the sliding boss 73. The position of the components on the sliding boss 73 and the slider 74 is changed by the hydraulic rod 76. Clamping parts A are symmetrically arranged on the inner side of both the fixed boss 73 and the sliding boss 73. Clamping parts A can clamp workpieces of different shapes. A limiter B is provided at the discharge point of the placement plate 72 to limit the left side of the workpiece. A rotating part C is provided on the worktable 1 below the rotating seat 71 to drive the workpiece to rotate.

[0037] Fixture 7: The workpiece moves to the top of the placement tray 72. The left side of the workpiece is limited by the limiting member B. Then, the hydraulic rod 76 drives the clamping member A to close and clamp the workpiece. During the clamping process, the clamping member A can automatically adapt to the shape of the workpiece for fixation. Then, the first cylinder 75 is controlled to shorten, driving the pressure claw 77 to move downward and press on the top of the workpiece to fix the top of the workpiece. After the workpiece is fixed, laser welding of the workpiece begins. During the workpiece welding process, the horizontal position of the workpiece can be changed by the rotating member C to achieve full welding of the workpiece. After the workpiece welding is completed, the hydraulic rod 76 and the first cylinder 75 are controlled to reset, so that the pressure claw 77 and the clamping member A are released and reset. The limiting member B no longer limits the left side of the workpiece. At this time, the welded workpiece falls onto the unloading plate 8 through the left side of the placement tray 72 and is discharged from the equipment.

[0038] like Figure 6 , Figure 7 Figure 9As shown, clamping component A includes a large semicircular block 78, a medium semicircular block 79, and a small semicircular block 710. The large semicircular block 78 is symmetrically and horizontally rotated on the inner surfaces of both the fixed boss 73 and the sliding boss 73. The medium semicircular block 79 is symmetrically and horizontally rotated on the vertical planes of the large semicircular block 78. The small semicircular block 710 is symmetrically and horizontally rotated on the vertical planes of the medium semicircular block 79. All three semicircular blocks—the large, medium, and small—rotate around their centers. The small semicircular block 710's vertical plane... The flat surface is toothed, and the toothed clamping surface can better clamp the workpiece. During the clamping process, if one of the small semicircular blocks 710 contacts the workpiece, the large semicircular block 78 and the medium semicircular block 79 will automatically rotate until the other small semicircular block 710 contacts the workpiece. Then the large semicircular block 78 and the medium semicircular block 79 stop rotating. In this way, each small semicircular block 710 will clamp the workpiece, so that the workpiece can be fixed more stably, and it can adapt to the fixing of workpieces of different shapes.

[0039] like Figure 6 , Figure 7 Figure 10 As shown, the limiting component B includes a second cylinder 711, a connecting plate 712, and a stop bar 713. The second cylinder 711 is installed below the discharge port on the left side of the placement tray 72. The telescopic end of the bottom of the second cylinder 711 is connected to the connecting plate 712. The stop bar 713 is vertically and symmetrically arranged on the top of the connecting plate 712, and the stop bar 713 extends upward through the placement tray 72. When the workpiece moves onto the placement tray 72, the stop bar 713 limits the left side of the workpiece. After the workpiece is welded, the second cylinder 711 is extended, which drives the connecting plate 712 and the stop bar 713 to move downward, so that the stop bar 713 leaves the upper surface of the placement tray 72. The left side of the workpiece is no longer blocked. At this time, the workpiece falls into the unloading plate 8 through the left side of the placement tray 72. Then, the second cylinder 711 is shortened and reset, which drives the connecting plate 712 and the stop bar 713 to move upward and reset.

[0040] like Figure 6 , Figure 7 Figure 11 As shown, the rotating component C includes a second motor 714 and a transmission component 715. The second motor 714 is installed inside the worktable 1. The second motor 714 and the rotating seat 71 are driven by the transmission component 715. The transmission component 715 consists of a small pulley, a large pulley, and a flat belt. The small pulley is installed on the output shaft of the second motor 714, the large pulley is concentrically installed on the rotating seat 71, and the flat belt is sleeved between the small pulley and the large pulley. By controlling the rotation of the second motor 714, the rotating seat 71 and its devices are driven to rotate through the transmission component 715, so that the workpiece rotates and changes position for welding.

[0041] like Figure 12As shown, it also includes a protective structure 9, which is a protective cover 91 fixed to the top of the workbench 1. The protective cover 91 covers the fixture 7; during the workpiece welding process, the protective cover 91 blocks the strong light of the welding.

[0042] like Figure 12 As shown, it also includes a dust suction pipe 92 installed on the discharge port protective cover 91 and an air blowing structure 93 installed on the feed port protective cover 91. The air blowing structure 93 has a moving function to achieve comprehensive removal of impurities. During the workpiece welding process, the dust suction pipe 92 is connected to the fume purification device to suck away the fumes during the welding process. The air blowing structure 93 is connected to the air source. Before the workpiece enters the fixture 7, the air blowing structure 93 blows air to blow away the dust on the surface of the workpiece to prevent the dust from affecting the welding quality of the workpiece during the welding process. like Figure 13 As shown, the air blowing structure 93 includes an L-shaped extension rod 931 at the rear end of the push plate 65. The L-shaped extension rod 931 extends horizontally to the left. A row of left-right extending protrusions 932 is provided on the front side of the L-shaped extension rod 931. A front-back extending slide rail 933 is provided on the right side of the protective cover 91. A sliding mounting plate 934 is slidably mounted on the slide rail 933. A row of nozzles 935 is provided on the sliding mounting plate 934. A spring 936 connects the sliding mounting plate 934 and the slide rail 933. A downward extending L-shaped push rod 937 is provided at the rear end of the sliding mounting plate 934. The movement paths of the push rod 937 and the protrusion 932 coincide. When the protrusion 932 moves to the left or right following the L-shaped extension rod 931, the protrusion 932 contacts the L-shaped push rod 937. The protrusion 932 pushes the L-shaped push rod 937 and the sliding mounting plate 934 and the nozzle 935 on it to move forward. The spring 936 is compressed. When the protrusion 932 leaves the L-shaped push rod 937, the spring 936 returns to its original position and drives the sliding mounting plate 934 and the nozzle 935 on it to move backward. This process is repeated. The nozzle 935 moves back and forth continuously, which can achieve the removal of impurities from all aspects of the workpiece.

[0043] Although this disclosure has been described with respect to only a limited number of embodiments, those skilled in the art who benefit from this disclosure will understand that various other embodiments can be devised without departing from the scope of the invention. Therefore, the scope of the invention should be limited only by the appended claims.

Claims

1. A multi-station laser welding machine for mechanical products, characterized in that it includes: The device includes a worktable (1), a laser (2), a three-axis module (3), a tilting mechanism (4), a laser head (5), a loading mechanism (6), a fixture (7), and a unloading plate (8). The laser (2) is installed inside the worktable (1). The three-axis module (3) is installed on the top of the worktable (1). The laser head (5) is installed on the three-axis module (3) through the tilting mechanism (4). The laser head (5) can adjust its pitch angle under the action of the tilting mechanism (4). The loading mechanism (6), fixture (7), and unloading plate (8) are provided on the top of the worktable (1) below the laser head (5). The unloading plate (8) is installed tilted downwards. The fixture (7) can drive the workpiece to rotate horizontally.

2. A multi-station laser welding machine for mechanical products according to claim 1, characterized in that, The three-axis module (3) includes an X module (31) horizontally mounted on the top of the workbench (1), a Z module (32) vertically fixed on the slide of the X module (31), and a Y module (33) horizontally fixed on the slide of the Z module (32).

3. A multi-station laser welding machine for mechanical products according to claim 2, characterized in that, The tilting mechanism (4) includes an extension plate (41) mounted on the slide plate of the Y module (33). The extension plate (41) is installed parallel to the Y module (33). The extension plate (41) and the slide plate of the Y module (33) are symmetrically provided with waist-shaped holes (42) at the position where they overlap. Fastening bolts (43) pass through the waist-shaped holes (42) and are screwed into the slide plate of the Y module (33). A first motor (44) is fixedly connected to the side of the extension plate (41). A worm gear (45) is connected to the output shaft of the first motor (44). A worm wheel (46) that meshes with the worm gear (45) is rotatably mounted on the extension plate (41). An adapter seat (47) is fixed to the side of the worm wheel (46). The laser head (5) is detachably fixedly mounted on the adapter seat (47).

4. A multi-station laser welding machine for mechanical products according to claim 3, characterized in that, The feeding mechanism (6) includes a support base (61) on the top of the workbench (1). A feeding channel (63) is installed on the top of the support base (61) via an electric rail (62). A rodless cylinder (64) is embedded in the feeding channel (63) along its extension direction. A push plate (65) is installed on the moving block of the rodless cylinder (64).

5. A multi-station laser welding machine for mechanical products according to claim 4, characterized in that, The clamp (7) includes a rotating seat (71) rotatably mounted on the top of the workbench (1). The rotating seat (71) is located at the end of the material conveying channel (63). A placement plate (72) is mounted on the top of the rotating seat (71). One side of the top of the placement plate (72) is a fixed boss (73), and the other side is a sliding boss (73). A slider (74) is slidably arranged in the middle of the fixed boss (73). A first cylinder (75) is provided at the bottom of both the slider (74) and the sliding boss (73). The top telescopic end is connected to a pressure claw (77). A hydraulic rod (76) is fixedly connected to the placement plate (72) at the fixed boss (73) and the sliding boss (73). The telescopic end of the hydraulic rod (76) is connected to the adjacent slider (74) and the sliding boss (73). Clamping parts (A) are symmetrically arranged on the inner side of the fixed boss (73) and the sliding boss (73). A limiting part (B) is provided at the discharge point of the placement plate (72). A rotating part (C) is provided on the worktable (1) below the rotating seat (71).

6. A multi-station laser welding machine for mechanical products according to claim 5, characterized in that, The clamping member (A) includes a large semicircular block (78), a medium semicircular block (79), and a small semicircular block (710). The large semicircular block (78) is symmetrically rotated on the inner surfaces of the fixed boss (73) and the sliding boss (73). The medium semicircular block (79) is symmetrically rotated on the vertical plane of the large semicircular block (78). The small semicircular block (710) is symmetrically rotated on the vertical plane of the medium semicircular block (79). The vertical plane of the small semicircular block (710) is toothed.

7. A multi-station laser welding machine for mechanical products according to claim 6, characterized in that, The limiting component (B) includes a second cylinder (711) fixed below the discharge port of the placement tray (72). The telescopic end of the second cylinder (711) is connected to a connecting plate (712). A stop bar (713) is symmetrically arranged on the top of the connecting plate (712). The stop bar (713) extends upward through the placement tray (72).

8. A multi-station laser welding machine for mechanical products according to claim 7, characterized in that, The rotating component (C) includes a second motor (714) installed in the workbench (1), and the second motor (714) and the rotating seat (71) are driven by a transmission component (715).

9. A multi-station laser welding machine for mechanical products according to claim 8, characterized in that, It also includes a protective structure (9), which is a protective cover (91) fixed to the top of the workbench (1).

10. A multi-station laser welding machine for mechanical products according to claim 9, characterized in that, It also includes a dust suction pipe (92) installed on the discharge port protective cover (91) and an air blowing structure (93) installed on the feed port protective cover (91), the air blowing structure (93) having a moving function to achieve comprehensive removal of impurities.

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