Closed laser welding equipment

Abstract

The utility model relates to the technical field of laser welding, in particular to closed type laser welding equipment. The laser welding equipment comprises a shell, a welding device, a moving module and a tool clamp, the shell is a closed shell, and the welding device is installed on the moving module; the tool clamp comprises a bearing plate, a clamping chuck, a positioning pressing head, a jacking assembly and a locking assembly, one end of the bearing plate is rotationally connected with the shell bottom plate, the clamping chuck and the positioning pressing head are arranged at the two ends of the top face of the bearing plate correspondingly, and the jacking assembly is installed on the shell bottom plate and used for jacking the bearing plate. And the locking assembly is mounted on the bottom surface of the bearing plate and is supported on the bottom plate of the shell. According to the utility model, the related problems of weld joint deviation, poor weld joint forming and the like caused by factors such as external environment and inaccurate positioning are solved, and the problem that a welded cylindrical workpiece cannot be welded to the root of a step is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of laser welding, in particular to a closed laser welding device. Background Art

[0002] As an advanced high-energy beam processing technology, laser welding is widely used in various fields of industrial production. Although laser welding is currently widely used, there are still some welding defects. Problems such as weld deviation and poor weld formation caused by external environment, smoke and inaccurate positioning, such as welding spatter, stoma, welding deviation, poor weld formation, etc.

[0003] In addition, horizontal fixtures are usually used for welding cylindrical workpieces (such as mufflers). When the root of the step needs to be welded, the laser beam is parallel to the step surface and the welding operation cannot be completed. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of the embodiments of the utility model is to provide a closed laser welding device to solve the problems such as weld deviation and poor weld formation caused by external environment, inaccurate positioning and other factors, as well as the problem that the cylindrical workpiece cannot be welded to the root of the step.

[0005] In order to achieve the above purpose, the embodiment of the utility model provides the following technical solutions:

[0006] A closed laser welding device comprises: a shell, a welding device, a mobile module and a tooling fixture, wherein the shell is a closed shell, the mobile module and the tooling fixture are both installed in the shell, and the welding device is installed on the mobile module; the tooling fixture comprises a bearing plate, a clamping chuck, a positioning pressure head, a lifting assembly and a locking assembly, one end of the bearing plate is rotatably connected to the bottom plate of the shell, the clamping chuck and the positioning pressure head are respectively arranged at two ends of the top surface of the bearing plate, the lifting assembly is installed on the bottom plate of the shell to lift the bearing plate, and the locking assembly is installed on the bottom surface of the bearing plate and supported on the bottom plate of the shell.

[0007] Optionally, the shell adopts a sheet metal sealing cover, and an upper and lower sliding door is arranged on the shell, and a dark green acrylic plate is arranged on the upper and lower sliding doors.

[0008] Optionally, the movable module includes an X-axis module, a Y-axis module and a Z-axis module, the X-axis module is mounted on the bottom plate of the shell, the Z-axis module is mounted on the X-axis module, the Y-axis module is mounted on the Z-axis module, and the welding device is mounted on the end of the Z-axis module.

[0009] Optionally, the lifting assembly is arranged at one end close to the rotation connection of the bearing plate, and the locking assembly is arranged at a side of the lifting assembly away from the rotation connection end of the bearing plate.

[0010] Optionally, the clamping chuck is used to clamp a workpiece, a rotating motor is installed on the carrying plate, the clamping chuck is installed on the rotating motor, and the rotating motor drives the clamping chuck to rotate.

[0011] Optionally, the positioning pressure head is used to press against the end of the workpiece away from the clamping chuck, and a movable seat is slidably mounted on the bearing plate, and the clamping chuck is mounted on the movable seat.

[0012] Optionally, the lifting assembly includes an adjusting unit, a slide plate and a push rod, the adjusting unit is mounted on the bottom plate of the shell, the slide plate is connected to the adjusting unit and is slidably mounted on the bottom plate of the shell, one end of the push rod is rotatably connected to the slide plate, and the other end is rotatably connected to the bottom plate of the supporting plate.

[0013] Optionally, the adjustment unit includes a fixed seat, a screw and a handwheel, the fixed seat is mounted on the bottom plate of the shell, the screw is rotatably mounted on the fixed seat, the handwheel is arranged at one end of the fixed seat, and the slide plate is mounted on the screw via a slider.

[0014] Optionally, the locking assembly includes a locking rod and a locking nut, an oblong groove is provided on the bottom plate of the shell, the bottom end of the locking rod is inserted into the oblong groove, the top end of the locking rod is rotatably connected to the bottom surface of the supporting plate, the locking nut is threadedly mounted on the locking rod, and the outer contour of the locking nut is larger than the width of the oblong groove.

[0015] Optionally, the welding equipment further includes a smoke exhaust system, wherein the smoke exhaust system includes a smoke exhaust pipe, wherein one end of the smoke exhaust pipe is arranged in the shell, and the other end extends out of the shell.

[0016] One or more technical solutions provided in the embodiments of the present utility model have at least the following technical effects or advantages:

[0017] The laser welding equipment of this embodiment adopts a closed shell to avoid the influence of the external environment. The positioning accuracy of the workpiece is ensured by clamping and pushing the clamping chuck and the positioning pressure head, avoiding problems such as weld deviation and poor weld formation. In addition, the clamping chuck and the positioning pressure head are installed together on a bearing plate, one end of the bearing plate is rotatably connected, and the bottom is lifted up by a lifting assembly, so that the bearing plate (clamping chuck and positioning pressure head) can adjust the angle according to the different welding postures of different workpieces, and the angle is fixed by a locking assembly, which is convenient for welding the root of the step surface.

[0018] Additional advantages of the present invention will be given in the following description, and some will become apparent from the following description or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0020] Figure 1 It is a schematic diagram of the appearance of the device provided by the embodiment of the utility model;

[0021] Figure 2 It is a three-dimensional diagram of the interior of the device provided by the embodiment of the utility model;

[0022] Figure 3 It is a front view of the interior of the device provided by the embodiment of the utility model;

[0023] Figure 4 It is a schematic diagram of the bottom of the load-bearing plate provided by an embodiment of the utility model;

[0024] Figure 5 It is a bottom view schematic diagram of a lifting assembly and a locking assembly provided by an embodiment of the utility model;

[0025] Figure 6 It is a top view schematic diagram of a lifting assembly and a locking assembly provided by an embodiment of the utility model;

[0026] In the figure: 1. Main machine; 2. Positioning pressure head; 4. Z-axis module; 5. X-axis module; 6. Y-axis module; 7. Welding device; 8. Clamping chuck; 9. Rotating motor; 10. Lifting assembly; 11. Water cooler; 12. Control system; 13. Sheet metal sealing cover; 14. Carrying plate; 15. Adjustment unit; 16. Rotating seat; 17. Push rod; 18. Locking assembly; 19. Slide plate; 20. Hand wheel; 21. Guide rail; 22. Support seat; 23. Locking nut; 24. Locking rod; 25. Screw rod;

[0027] In order to show the positions of various parts, the distances or sizes between them are exaggerated and the schematic diagram is for reference only. DETAILED DESCRIPTION

[0028] It should be noted that the following detailed descriptions are all illustrative and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0029] In the laser welding process, in order to ensure the welding quality, on the one hand, it is necessary to use a laser with good beam quality and laser output power stability and a light guide and focusing system composed of high-quality and high-stability optical components, and to prevent external dust and keep it clean. On the other hand, it is necessary to ensure the processing and assembly accuracy of the workpiece and the accurate positioning and reliable clamping of the welding fixture to ensure welding accuracy and effectively prevent and reduce thermal deformation. In addition, when there are two cylinders with different diameters to be welded, the root of the step needs to be welded, and welding cannot be performed when the laser beam is parallel to the step surface.

[0030] In order to solve the problems of weld deviation and poor weld formation caused by external environment, inaccurate positioning and other factors during the laser welding of similar cylindrical workpieces such as silencers, this embodiment proposes a closed precision laser welding equipment involving welding of silencers and other cylindrical workpieces of various diameters and precise control of rotation angles.

[0031] like Figure 1 , Figure 2 As shown, the closed laser welding equipment includes a housing, a welding device 7 (i.e., a laser welding head), a mobile module (X-axis module 5, Y-axis module 6, and Z-axis module 4), and a fixture, wherein the housing is a closed housing, the mobile module and the fixture are both installed in the housing, and the welding device 7 is installed on the mobile module; Figure 2 , Figure 3 As shown, the tooling fixture includes a bearing plate 14, a clamping chuck 8, a positioning pressure head 2, a lifting assembly 10 and a locking assembly 18. One end of the bearing plate 14 is rotatably connected to the bottom plate of the shell through a rotating seat 16. The clamping chuck 8 and the positioning pressure head 2 are respectively arranged at both ends of the top surface of the bearing plate 14. The lifting assembly 10 is installed on the bottom plate of the shell to lift the bearing plate 14. The locking assembly 18 is installed on the bottom surface of the bearing plate 14 and supported on the bottom plate of the shell.

[0032] The laser welding equipment of this embodiment adopts a closed housing to avoid the influence of the external environment, and ensures the positioning accuracy of the workpiece by clamping and pushing the clamping chuck 8 and the positioning pressure head 2, avoiding problems such as weld deviation and poor weld formation. In addition, the clamping chuck 8 and the positioning pressure head 2 are installed together on a carrier plate 14, one end of the carrier plate 14 is rotatably connected, and the bottom is lifted by the lifting component 10, so that the carrier plate 14 (clamping chuck 8 and positioning pressure head 2) can adjust the angle according to the different welding postures of different workpieces, and fix the angle by the locking component, which is convenient for welding the root of the step surface.

[0033] The housing adopts a sheet metal sealing cover 13, and an upper and lower sliding door is provided on the housing, and a dark green acrylic plate is provided on the upper and lower sliding door. This embodiment adopts a closed dust-free sheet metal sealing cover 13 to effectively prevent external factors (external strong light, dust and other factors) from affecting the optical path system and welding effect. The operating area is an upper and lower sliding door, equipped with a dark green acrylic plate to prevent the laser from causing harm to the human body and facilitate observation of the welding process.

[0034] The mobile module includes an X-axis module 5, a Y-axis module 6 and a Z-axis module 4, the X-axis module 5 is mounted on the bottom plate of the shell, the Z-axis module 4 is mounted on the X-axis module 5, the Y-axis module 6 is mounted on the Z-axis module 4, and the welding device 7 is mounted at the end of the Z-axis module 4. The mobile module drives the welding head to move in three-axis directions to facilitate welding at different positions.

[0035] The lifting assembly 10 is disposed at one end of the rotation connection close to the bearing plate 14, and the locking assembly 18 is disposed at a side of the lifting assembly 10 away from the rotation connection end of the bearing plate 14. Figure 3 As shown, the left side of the base plate is a rotating connection, the right side is a locking assembly 18, and the middle of the two is a lifting assembly 10 for easy adjustment and locking.

[0036] The clamping chuck 8 is used to clamp the workpiece, the rotating motor 9 is installed on the bearing plate 14, the clamping chuck 8 is installed on the rotating motor 9, and the rotating motor 9 drives the clamping chuck 8 to rotate. The positioning pressure head 2 is used to press against the end of the workpiece away from the clamping chuck 8, the moving seat is slidably installed on the bearing plate 14, and the clamping chuck 8 is installed on the moving seat.

[0037] The fixture is horizontal, with a rotary clamping chuck 8 on the left, and a rotary motor 9 driving the reducer to rotate the chuck. On the right is a follower positioning ram 2, driven by a cylinder and guided by a guide rail 21. After the workpiece is clamped with the clamping chuck 8, the cylinder drives the positioning ram 2 to press the workpiece (the positioning ram 2 and the clamping chuck 8 are coaxial, and the positioning ram 2 is a conical structure with a centering function) to accurately position the workpiece, ensure welding accuracy and effectively prevent and reduce thermal deformation. In addition, the fixture can be customized according to the shape of the workpiece.

[0038] like Figure 4 , Figure 5 , Figure 6As shown, the lifting assembly 10 includes an adjustment unit 15, a slide plate 19 and a push rod 17. The adjustment unit 15 is mounted on the bottom plate of the shell. The slide plate 19 is connected to the adjustment unit 15 and slidably mounted on the bottom plate of the shell. The slide plate 19 can slide along the slide rail. One end of the push rod 17 is rotatably connected to the slide plate 19, and the other end is rotatably connected to the bottom plate of the bearing plate 14. Specifically, a support seat 22 is rotatably mounted on the top of the push rod 17, and the support seat 22 is detachably mounted on the bottom surface of the bearing plate 14. The adjustment unit 15 includes a fixed seat, a screw rod 25 and a hand wheel 20. The fixed seat is mounted on the bottom plate of the shell. The screw rod 25 is rotatably mounted on the fixed seat. The hand wheel 20 is arranged at one end of the fixed seat. The slide plate 19 is mounted on the screw rod 25 through a slider, and the slider is threadedly connected to the screw rod 25.

[0039] The locking assembly 18 includes a locking rod 24 and a locking nut 23. The bottom plate of the housing is provided with an oblong groove (such as Figure 4 As shown), the bottom end of the locking rod 24 is inserted into the oblong groove, the top end of the locking rod 24 is rotatably connected to the bottom surface of the bearing plate 14, the locking nut 23 is threadedly mounted on the locking rod 24, and the outer contour of the locking nut 23 is larger than the groove width of the oblong groove.

[0040] The support plate 14 is unlocked or locked by the locking nut 23. After the structure is unlocked, the hand wheel 20 is shaken to drive the screw rod 25 to push the slider and the slide plate 19 to move left and right, and then the support plate 14 is lifted and rotated by the push rod 17, and then the rotation angle is fixed by adjusting the position of the locking nut 23 on the locking rod 24.

[0041] The laser is emitted by the laser in the welding machine host 1, transmitted to the laser welding head through the optical fiber line, and controlled by the control system 12, and the laser and the laser welding head are cooled in cooperation with the water cooler 11. In addition, the welding equipment also includes a smoke exhaust system, which includes a smoke exhaust pipe, one end of which is arranged in the shell, and the other end extends out of the shell. The smoke exhaust pipe is connected to the smoke purifier to extract the smoke and welding slag generated during welding in time, so as to prevent dust, welding smoke and welding slag from contaminating the light guide and focusing system composed of optical elements and keep it clean.

[0042] The use process of the above laser welding equipment:

[0043] The workpiece is manually placed on the clamping chuck 8 and locked. The solenoid valve controls the cylinder to drive the positioning pressure head 2 to push to the left, press the workpiece, and rotate it accordingly.

[0044] Unscrew the locking nut 23, turn the hand wheel 20 to move the slide plate 19 left and right, push the push rod 17 to make the bearing plate 14 reach a suitable angle, unscrew the locking nut 23 to lock it, and complete the adjustment of the welding head angle position.

[0045] After closing the sealing cover sliding door, press the start button and the equipment starts working.

[0046] First, the X-axis module 5 (screw rod 25 transmission device), the Y-axis module 6 and the Z-axis module 4 are driven by the motor to transmit the laser welding head to the welding waiting position.

[0047] Then the clamping chuck 8 is rotated under the drive of the rotary motor 9, the welding head moves to the welding position, the laser starts to emit light for welding, and at the same time the smoke exhaust system is started to draw the smoke generated during the welding process to the smoke filter for filtering.

[0048] The laser is emitted by a laser in a welding machine cabinet and transmitted to a laser welding head through a micron core optical fiber line. A water cooler 11 cools the laser and the laser welding head.

[0049] During the welding process, the welding process can be observed through the dark green plexiglass, and the weld can be monitored and tested, and an alarm can be given for unqualified products.

[0050] After welding is completed, the clamping chuck 8 device stops rotating, the X / Y / Z axis module 4 drives the laser welding head to the origin position, opens the sealing cover sliding door, and takes out the workpiece.

[0051] Laser welding operations in this equipment can improve welding quality, increase the qualified rate of finished products, and perform a certain degree of automated welding operations.

[0052] Although the above describes the specific implementation methods of the utility model in conjunction with the accompanying drawings, it is not intended to limit the protection scope of the utility model. Technical personnel in the relevant field should understand that on the basis of the technical solution of the utility model, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the protection scope of the utility model.

Claims

1. A closed laser welding device, characterized in that: include: A housing, a welding device, a mobile module and a fixture, wherein the housing is a closed housing, the mobile module and the fixture are both installed in the housing, and the welding device is installed on the mobile module; The tooling fixture includes a load-bearing plate, a clamping chuck, a positioning pressure head, a lifting assembly and a locking assembly. One end of the load-bearing plate is rotatably connected to the bottom plate of the shell. The clamping chuck and the positioning pressure head are respectively arranged at two ends of the top surface of the load-bearing plate. The lifting assembly is installed on the bottom plate of the shell to lift the load-bearing plate. The locking assembly is installed on the bottom surface of the load-bearing plate and supported on the bottom plate of the shell.

2. The closed laser welding equipment according to claim 1, characterized in that: The shell body adopts a sheet metal sealing cover, and an upper and lower sliding door is arranged on the shell body, and a dark green acrylic plate is arranged on the upper and lower sliding door.

3. The closed laser welding equipment according to claim 1, characterized in that: The movable module includes an X-axis module, a Y-axis module and a Z-axis module. The X-axis module is mounted on the bottom plate of the shell, the Z-axis module is mounted on the X-axis module, the Y-axis module is mounted on the Z-axis module, and the welding device is mounted on the end of the Z-axis module.

4. The closed laser welding equipment according to claim 1, characterized in that: The lifting assembly is arranged at one end close to the rotation connection of the bearing plate, and the locking assembly is arranged at a side of the lifting assembly away from the rotation connection end of the bearing plate.

5. The closed laser welding equipment according to claim 1, characterized in that: The clamping chuck is used to clamp a workpiece. A rotating motor is installed on the bearing plate. The clamping chuck is installed on the rotating motor. The rotating motor drives the clamping chuck to rotate.

6. The closed laser welding equipment according to claim 1, characterized in that: The positioning pressure head is used to press against the end of the workpiece away from the clamping chuck. The bearing plate is slidably mounted with a moving seat, and the clamping chuck is mounted on the moving seat.

7. The closed laser welding equipment according to claim 1, characterized in that: The lifting assembly includes an adjusting unit, a slide plate and a push rod. The adjusting unit is mounted on the bottom plate of the shell. The slide plate is connected to the adjusting unit and is slidably mounted on the bottom plate of the shell. One end of the push rod is rotatably connected to the slide plate, and the other end is rotatably connected to the bottom plate of the supporting plate.

8. The closed laser welding equipment according to claim 7, characterized in that: The adjusting unit comprises a fixing seat, a screw and a hand wheel, wherein the fixing seat is mounted on the bottom plate of the housing, the screw is rotatably mounted on the fixing seat, the hand wheel is arranged at one end of the fixing seat, and the slide plate is mounted on the screw through a slider.

9. The closed laser welding equipment according to claim 1, characterized in that: The locking assembly includes a locking rod and a locking nut. An oblong groove is provided on the bottom plate of the shell. The bottom end of the locking rod is inserted into the oblong groove. The top end of the locking rod is rotatably connected to the bottom surface of the supporting plate. The locking nut is threadedly mounted on the locking rod, and the outer contour of the locking nut is larger than the groove width of the oblong groove.

10. The closed laser welding equipment according to claim 1, characterized in that: The welding equipment also includes a smoke exhaust system, which includes a smoke exhaust pipe, one end of which is arranged in the shell, and the other end of which extends out of the shell.

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