A laser welding device for opaque materials
The laser welding equipment for opaque materials with a dual laser emission head and turntable linkage structure solves the problems of high cost and low efficiency of existing equipment in welding opaque materials, and achieves efficient and adaptable welding effects.
Patent Information
- Application Number
- CN202510968558.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-15
- Publication Date
- 2025-09-16
- Estimated Expiration
- 2045-07-15
AI Technical Summary
Existing laser welding equipment requires replacing the laser or adjusting the optical system when welding opaque materials, which is costly, inefficient, and has poor versatility.
It adopts a dual laser emission head design, combined with the linkage structure of the turntable, fixed frame, sliding frame and rotating frame, and is precisely controlled by the servo electric cylinder to achieve accurate docking and welding of opaque materials. It has a wide range of applications and does not require switching processes.
It achieves efficient welding of opaque materials, improves production efficiency, reduces operation complexity, and enhances the adaptability of the equipment.
Smart Images
Figure CN120460896B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of laser welding, and in particular to a laser welding device for opaque materials. Background Art
[0002] Laser welding technology is widely used in industrial manufacturing due to its advantages such as high precision, high efficiency and small heat-affected zone. At present, common laser welding methods are mainly based on the principle of transmission welding, that is, after the laser beam penetrates the upper layer of light-transmitting material, it is absorbed by the lower layer of light-absorbing material or at the interface between the two layers of material and converted into heat energy, thereby achieving the welding of the materials. This process is widely used to connect light-transmitting materials such as plastics and glass with light-absorbing materials, for example in the fields of medical devices, electronic component packaging and automotive parts manufacturing. However, this technology has obvious limitations: the welding process usually requires that at least one of the materials be light-transmitting to ensure that the laser can penetrate and act on the welding interface.
[0003] When both materials to be welded are opaque, traditional transmission welding methods are difficult to apply directly. Although welding can theoretically be achieved by selecting a laser wavelength that matches the material's absorption spectrum, the absorption characteristics of lasers vary significantly between different materials. For example, metals have a high absorption rate for near-infrared lasers, while ceramics may require pulsed lasers of a specific wavelength. Therefore, in actual production, it is necessary to replace the laser or adjust the optical system for different materials. This not only increases equipment costs, but also complicates the process and reduces production efficiency. In addition, some special materials have extremely low absorption rates for lasers, making stable welding difficult even with matching wavelengths, further limiting the versatility of laser welding technology. Summary of the Invention
[0004] In view of this, the present invention provides a laser welding device for opaque materials, which can overcome the shortcomings of existing laser welding equipment, such as the need to replace the laser or adjust the optical system for different materials when welding two opaque materials, resulting in high cost, low production efficiency and great limitations.
[0005] The technical implementation scheme of the present invention is: a laser welding device for opaque materials, comprising: a housing; a control panel installed on the side of the housing; a workbench arranged inside the housing; a control box installed inside the workbench; a laser generator installed inside the workbench; two laser emission heads are provided, and both laser emission heads are located above the workbench; a turntable rotatably connected to the workbench; a fixed frame circumferentially spaced and connected to the top of the turntable; a sliding frame slidably connected to the fixed frame; a first servo electric cylinder installed on the fixed frame, and the telescopic rod of the first servo electric cylinder is connected to the sliding frame; a rotating frame rotatably connected to the sliding frame; a placement The frame is connected to the fixed frame and the rotating frame respectively; the rotating assembly is arranged on the workbench; the rotating assembly includes: a hollow rotating platform, which is installed on the workbench, and the hollow rotating platform is electrically connected to the control box; a rotating cylinder, which is connected to the turntable, and the rotating cylinder is connected to the turntable of the hollow rotating platform, so that the control box controls the hollow rotating platform to drive the rotating cylinder to rotate intermittently, and the rotating cylinder drives the turntable to rotate intermittently; the moving assembly is arranged on the workbench, and is used to drive the laser transmitting head to move; the flipping assembly is arranged on the sliding frame, and is used to drive the rotating frame to flip, so that the placement frames on the fixed frame and the rotating frame are docked with each other.
[0006] Optionally, the moving component includes: an electric slide rail installed on the top of the workbench; a mounting plate connected to a slider of the electric slide rail, and the laser transmitter is connected to the mounting plate.
[0007] Optionally, the flip assembly includes: a second servo electric cylinder installed on the sliding frame; a cross bar connected to the telescopic rod of the second servo electric cylinder, and through holes are symmetrically opened on the rotating frame, and the ends of the cross bar slide in the through holes.
[0008] Optionally, it also includes: a fixed rod connected to the side of the placement frame on the rotating frame; a guide rod slidably connected to the fixed rod; a pressure block connected to one end of the guide rod, and a square hole is opened on the side of the placement frame on the rotating frame, and the pressure block is located in the square hole; a connecting spring is wound around the outside of the guide rod, and the two ends of the connecting spring are respectively connected to the fixed rod and the pressure block.
[0009] Optionally, it also includes: a fixed plate connected to the top of the workbench; a material guide inclined plate connected to the fixed plate; and a toggle assembly provided on the material guide inclined plate for toggling the guide rod for movement.
[0010] Optionally, the toggle assembly includes: a connecting frame connected to the top of the material guide inclined plate; an arc-shaped protrusion connected to the side of the connecting frame; a connecting block connected to the other end of the guide rod; a roller rotatably connected to the side of the connecting block, and the roller can contact the arc-shaped protrusion as the turntable rotates.
[0011] Optionally, it also includes: a laser distance measuring sensor installed on the side of the first servo electric cylinder.
[0012] The present invention has the following advantages: 1. The present invention can heat the end faces of two workpieces to their melting temperature respectively through two laser emission heads, and then by setting a linkage structure of a fixed frame, a sliding frame and a rotating frame, and cooperating with the precise control of the first servo electric cylinder and the second servo electric cylinder, it can achieve precise flipping and positioning of the workpieces, ensure that the end faces of two opaque material workpieces are accurately docked, and perform compression welding. It has a wide range of applications, does not require switching processes, and can improve production efficiency.
[0013] 2. The present invention utilizes the intermittent rotation design of the turntable, combined with the distribution of four workstations (loading, welding, pressure holding and cooling, and unloading), to achieve multi-station continuous operation. At the same time, the pressing block is always in close contact with the side of the workpiece under the action of the connecting spring, which can prevent the workpiece from shifting during the flipping process. The laser ranging sensor monitors the pressing distance in real time, and the entire process of welding, pressure holding and unloading can be completed without human intervention, thereby improving production efficiency.
[0014] 3. The placement frame of the present invention adopts a detachable design, which can be quickly replaced according to the shape of different workpieces and adapt to the welding needs of various opaque materials. At the same time, through the clever cooperation of the toggle components, the workpiece can automatically detach from the placement frame after welding is completed and slide to the material guide inclined plate for discharge, which can not only reduce the complexity of operation, but also enhance the adaptability of the equipment to different workpieces. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.
[0016] Figure 2 For the present invention Figure 1 Schematic diagram of the three-dimensional structure without the casing and control panel.
[0017] Figure 3 It is a schematic diagram of the specific structure of the top of the turntable of the present invention.
[0018] Figure 4 It is a schematic diagram of the separation structure of the fixed frame, the sliding frame and the rotating frame of the present invention.
[0019] Figure 5 This is a schematic diagram of the installation of the flip assembly of the present invention.
[0020] Figure 6 Schematic diagram of the installation of the rotating assembly of the present invention.
[0021] Figure 7 This is a schematic diagram of the installation of the fixing rod, guide rod, pressure block and connecting spring of the present invention.
[0022] Figure 8 It is a schematic diagram of the specific structure of the fixing rod, guide rod, pressure block and connecting spring of the present invention.
[0023] Figure 9 This is a schematic diagram of the installation of the fixed plate, the material guide inclined plate and the connecting frame of the present invention.
[0024] Figure 10 Schematic diagram of the specific structure of the connecting frame and the arc-shaped protrusion of the present invention.
[0025] Figure 11 Schematic diagram of the installation of the connecting block and the roller of the present invention.
[0026] The meanings of the reference numerals in the figure are: 1- housing, 2- control panel, 3- workbench, 4- control box, 5- laser generator, 6- laser transmitter head, 7- turntable, 8- fixed frame, 9- sliding frame, 10- first servo cylinder, 11- rotating frame, 12- placing frame, 13- electric slide rail, 14- mounting plate, 15- second servo cylinder, 16- cross bar, 17- through hole, 18- hollow rotating platform, 19- rotating cylinder, 20- fixed rod, 21- guide rod, 22- pressure block, 23- square hole, 24- connecting spring, 25- fixed plate, 26- guide inclined plate, 27- connecting frame, 28- arc-shaped protrusion, 29- connecting block, 30- roller, 31- laser ranging sensor. DETAILED DESCRIPTION
[0027] Example: A laser welding device for opaque materials, such as Figures 1-6 As shown, it includes an organic shell 1, a control panel 2, a workbench 3, a control box 4, a laser generator 5, a laser emitting head 6, a turntable 7, a fixed frame 8, a sliding frame 9, a first servo electric cylinder 10, a rotating frame 11, a placement frame 12, a moving component, a flip component and a rotating component. The control panel 2 is installed on the upper front side of the shell 1, the workbench 3 is provided inside the shell 1, the control box 4 is installed on the right front side of the inside of the workbench 3, the laser generator 5 is installed on the right rear side of the inside of the workbench 3, two laser emitting heads 6 are provided above the workbench 3, the laser emitting head 6 is connected to the laser generator 5 through an optical fiber, the upper right side of the workbench 3 is rotatably connected to the turntable 7, and four fixed frames 8 are connected to the top of the turntable 7 at circumferential intervals. The positions of the four fixed frames 8 are four The upper part of each fixed frame 8 is slidably connected to a sliding frame 9, and the lower part of each fixed frame 8 is installed with a first servo electric cylinder 10, and the telescopic rod of the first servo electric cylinder 10 is connected to the bottom of the sliding frame 9. Each sliding frame 9 is rotatably connected to a rotating frame 11, and the side of each rotating frame 11 and the top of each fixed frame 8 are detachably installed with a placement frame 12. The inner wall shape of the placement frame 12 is consistent with the shape of the workpiece to be processed, which is similar to the function of a mold and can be replaced according to different workpiece shapes. The workbench 3 is provided with a moving component for driving the laser emitting head 6 to move, the sliding frame 9 is provided with a flipping component for driving the rotating frame 11 to flip, and the workbench 3 is provided with a rotating component for driving the turntable 7 to rotate intermittently.
[0028] like Figure 2 As shown, the moving assembly includes an electric slide rail 13 and a mounting plate 14. The electric slide rails 13 are installed on the top left side and the top rear side of the workbench 3. The sliders of the two electric slide rails 13 are connected to the mounting plates 14, and the two laser emission heads 6 are respectively installed on the two mounting plates 14.
[0029] like Figure 3 and Figure 5 As shown, the flip assembly includes a second servo electric cylinder 15 and a cross bar 16. The second servo electric cylinder 15 is installed on each sliding frame 9. The cross bar 16 is connected to the telescopic rod of the second servo electric cylinder 15. Two through holes 17 are symmetrically opened at the lower part of each rotating frame 11, and the two ends of the cross bar 16 slide inside the two through holes 17 respectively.
[0030] like Figure 6 As shown, the rotating assembly includes a hollow rotating platform 18 and a rotating cylinder 19. The hollow rotating platform 18 is installed in the middle of the inner top of the workbench 3, the rotating cylinder 19 is connected to the middle of the turntable 7, and the lower end of the rotating cylinder 19 is connected to the turntable of the hollow rotating platform 18.
[0031] like Figure 7 and Figure 8 As shown, it also includes a fixed rod 20, a guide rod 21, a pressure block 22 and a connecting spring 24. The top of the placement frame 12 on each rotating frame 11 is connected to the fixed rod 20, and the middle of each fixed rod 20 is slidably connected to the guide rod 21. The lower end of each guide rod 21 is connected to the pressure block 22, and the bottom of the pressure block 22 is an arc surface. A square hole 23 is opened in the middle of the top of the placement frame 12 on each rotating frame 11, and the pressure block 22 is located in the square hole 23. A connecting spring 24 is wound around the outside of each guide rod 21, and the two ends of the connecting spring 24 are respectively connected to the fixed rod 20 and the pressure block 22.
[0032] like Figures 9-11 As shown, it also includes a fixed plate 25, a material guide inclined plate 26 and a toggle assembly. The fixed plate 25 is connected to the top right side of the workbench 3, and the upper part of the fixed plate 25 is connected to the material guide inclined plate 26. The material guide inclined plate 26 is provided with a toggle assembly for toggling the guide rod 21 to move; the toggle assembly includes a connecting frame 27, an arc-shaped protrusion 28, a connecting block 29 and a roller 30. The top left side of the material guide inclined plate 26 is connected to the connecting frame 27, and the upper right side of the connecting frame 27 is connected to the arc-shaped protrusion 28. The right side of the arc-shaped protrusion 28 is an arc surface. The upper end of each guide rod 21 is connected to a connecting block 29, and the connecting block 29 is rotatably connected to the roller 30, and the roller 30 can contact the arc-shaped protrusion 28 as the turntable 7 rotates.
[0033] like Figure 3As shown, a laser distance measuring sensor 31 is also included. A laser distance measuring sensor 31 is installed on the side of each first servo electric cylinder 10.
[0034] When laser welding is required between two workpieces made of opaque materials, the operator first places the two workpieces in the two placement frames 12 on the front side. When one of the workpieces enters the placement frame 12 on the rotating frame 11, the workpiece contacts the curved surface of the pressure block 22, thereby pushing the pressure block 22 upward. The connecting spring 24 is compressed, and the pressure block 22 drives the guide rod 21, the connecting block 29, and the roller 30 upward. Under the elastic force of the connecting spring 24, the curved surface of the pressure block 22 is always in close contact with the side of the workpiece. The operator then performs corresponding operations on the control panel 2. The control panel 2 sends a signal. After receiving the signal, the control box 4 controls the hollow rotating platform 18 to drive the rotating cylinder 19 to rotate intermittently. The rotating cylinder 19 drives the turntable 7 to rotate intermittently. The turntable 7 drives the fixed frame 8, the sliding frame 9, the rotating frame 11, and the placement frame 12 to rotate intermittently. The placement frame 12 can drive the workpiece inside it to rotate to the work station on the left. At this time, the control box 4 will control the laser generator 5 and the laser emitting head 6 to start working. The laser generator 5 is responsible for generating the laser beam. The two laser emitting heads 6 can effectively transmit the laser beam to the end faces of the two workpieces respectively, thereby heating the welding ribs on the end faces of the two workpieces. At this time, the operator can place the two workpieces in the two placement frames 12 of the next group respectively. When the temperature of the end faces of the two workpieces is heated to the melting temperature of their own materials, the control box 4 will control the laser generator 5 and the laser emission head 6 to stop working, and control the corresponding second servo electric cylinder 15 to drive the cross bar 16 to move upward. The cross bar 16 can push the rotating frame 11 to flip downward through the action of the through hole 17. The rotating frame 11 can drive the placement frame 12 and the fixed rod 20, guide rod 21, connecting block 29 and roller 30 thereon to flip downward, so that the two placement frames 12 are docked up and down, and the roller 30 is flipped from a vertical state to a horizontal state, and the placement frame 12 can drive the workpiece inside it to flip downward. At this time, the pressure block 22 can prevent the workpiece from shifting due to gravity during the flipping process through the friction between it and the workpiece, ensuring that the end faces of the two workpieces can be accurately docked. The control box 4 then controls the corresponding first servo cylinder 10 to drive the slide 9 downward. The slide 9 then drives the turret 11 downward, which in turn drives the placement frame 12 on it downward. The placement frame 12 then drives the workpiece inside it downward, thereby pressing and welding the two workpieces. When the laser ranging sensor 31 detects that the distance between it and the bottom of the slide 9 has reached a preset value, the laser ranging sensor 31 will send a signal. Upon receiving this signal, the control box 4 will control the first servo cylinder 10 to stop working, thereby controlling the downward movement distance of the slide 9 and, in turn, the penetration depth of the two workpieces, ensuring consistent processing.During the welding process of the two workpieces, the control box 4 will control the turntable 7 to continue rotating, and the turntable 7 will drive the two welded workpieces to rotate to the rear workstation, so that the two welded workpieces can be pressure-maintained and cooled at the rear workstation to ensure stable welding of the two workpieces, and the turntable 7 can drive the next group of workpieces to be welded to rotate to the left workstation. After the next group of workpieces is welded, the control box 4 will control the turntable 7 to continue rotating, and the turntable 7 can drive the next group of welded workpieces to rotate to the rear workstation, and the turntable 7 can drive the previous group of welded workpieces to rotate to the right workstation. During the rotation process, the control box 4 will control the corresponding first servo electric cylinder 10 to drive the sliding frame 9 to move upward, and the sliding frame 9 can drive the rotating frame 11 to move upward, and the rotating frame 11 can drive the placement frame 12 thereon to move upward. The placement frame 12 can drive the welded workpieces to move upward through the friction between the pressure block 22 and the workpiece, so that the welded workpieces are separated from the placement frame 12 on the fixed frame 8. When the welded workpiece rotates to between the guide ramp 26 and the connecting frame 27, the roller 30 just contacts the arc-shaped protrusion 28, which squeezes the roller 30 away from the placement frame 12. The roller 30 drives the connecting block 29, the guide rod 21, and the pressure block 22 away from the placement frame 12. The connecting spring 24 is compressed again, causing the pressure block 22 to separate from the welded workpiece, allowing the welded workpiece to fall downward due to gravity to the top of the guide ramp 26 and slide to the right along the guide ramp 26 for discharge. When the turntable 7 drives the placement frame 12 back to the front workstation, the roller 30 disengages the arc-shaped protrusion 28, and the connecting spring 24 returns to its original state, driving the guide rod 21, the pressure block 22, the connecting block 29, and the roller 30 to move back toward the placement frame 12 and return to its original position. Then the control box 4 will control the first servo electric cylinder 10 to drive the sliding frame 9 to move downward to its original position. The sliding frame 9 can drive the rotating frame 11 to move downward to its original position. The rotating frame 11 can drive the placement frame 12 on it to move downward to its original position, and the control box 4 will control the corresponding second servo electric cylinder 15 to drive the crossbar 16 to move downward and reset. The crossbar 16 can push the rotating frame 11 to flip upward and reset through the action of the through hole 17. The rotating frame 11 can drive the placement frame 12 on it to flip upward and reset. Repeat the above operation to automatically perform laser welding on workpieces of two opaque materials. When it is necessary to weld workpieces of different shapes, the placement frame 12 can be disassembled and replaced, and then the electric slide 13 can be controlled by the control box 4 to drive the mounting plate 14 to move. The mounting plate 14 can drive the laser transmitter 6 to move and adjust its position to adapt to workpieces of different shapes.
Claims
1. A laser welding device for opaque materials, comprising: a housing (1); characterized in that: The machine also includes: a control panel (2) mounted on the side of the housing (1); a workbench (3) arranged inside the housing (1); a control box (4) mounted inside the workbench (3); a laser generator (5) mounted inside the workbench (3); two laser emission heads (6) provided, and both laser emission heads (6) are located above the workbench (3); a turntable (7) rotatably connected to the workbench (3); a fixed frame (8) connected to the top of the turntable (7) at circumferential intervals; a sliding frame (9) slidably connected to the fixed frame (8); a first servo electric cylinder (10) mounted on the fixed frame (8), and a telescopic rod of the first servo electric cylinder (10) is connected to the sliding frame (9); a rotating frame (11), rotatably connected to the sliding frame (9); the placement frame (12), respectively connected to the fixed frame (8) and the rotating frame (11); the rotating assembly, arranged on the workbench (3); the rotating assembly includes: a hollow rotating platform (18), installed on the workbench (3), and the hollow rotating platform (18) is electrically connected to the control box (4); a rotating cylinder (19), connected to the turntable (7), and the rotating cylinder (19) is connected to the turntable of the hollow rotating platform (18), so that the control box (4) controls the hollow rotating platform (18) to drive the rotating cylinder (19) to rotate intermittently, and the rotating cylinder (19) drives the turntable (7) to rotate intermittently; the moving assembly, arranged on the workbench (3) , used to drive the laser emitting head (6) to move; a flip assembly, arranged on the sliding frame (9), used to drive the rotating frame (11) to flip, so that the fixed frame (8) and the placement frame (12) on the rotating frame (11) are docked with each other; also includes: a fixed rod (20), connected to the side of the placement frame (12) on the rotating frame (11); a guide rod (21), slidably connected to the fixed rod (20); a pressure block (22), connected to one end of the guide rod (21), and a square hole (23) is opened on the side of the placement frame (12) on the rotating frame (11), and the pressure block (22) is located in the square hole (23); a connecting spring (24), wound around the outside of the guide rod (21), and the connecting spring The two ends of (24) are respectively connected to the fixed rod (20) and the pressure block (22); it also includes: a fixed plate (25), connected to the top of the workbench (3); a material guide inclined plate (26), connected to the fixed plate (25); a toggle assembly, arranged on the material guide inclined plate (26), for toggling the guide rod (21) to move; the toggle assembly includes: a connecting frame (27), connected to the top of the material guide inclined plate (26); an arc-shaped protrusion (28), connected to the side of the connecting frame (27); a connecting block (29), connected to the other end of the guide rod (21); a roller (30), rotatably connected to the side of the connecting block (29), and the roller (30) can contact the arc-shaped protrusion (28) as the turntable (7) rotates.
2. The laser welding equipment for opaque materials according to claim 1, characterized in that: The moving assembly includes: an electric slide rail (13) installed on the top of the workbench (3); a mounting plate (14) connected to the slider of the electric slide rail (13); and a laser emitting head (6) connected to the mounting plate (14).
3. The laser welding equipment for opaque materials according to claim 1, characterized in that: The flip assembly includes: a second servo electric cylinder (15) mounted on the sliding frame (9); a cross bar (16) connected to the telescopic rod of the second servo electric cylinder (15); and a through hole (17) symmetrically opened on the rotating frame (11), and the end of the cross bar (16) slides in the through hole (17).
4. The laser welding equipment for opaque materials according to claim 1, characterized in that: It also includes a laser distance measuring sensor (31) installed on the side of the first servo electric cylinder (10).
Citation Information
Patent Citations
Vacuum hard-to-hard adhering overturning jig and adhering device
CN202941090U