Laser welding device

Abstract

The invention relates to the technical field of laser welding, and discloses a laser welding device which is characterized in that the first end of a mechanical arm is mounted on a base; the laser head assembly is installed at the second end of the mechanical arm and arranged in the first direction. The limiting assembly comprises a fixing piece, a telescopic piece, a protection piece and a rotating ball. The fixed part is installed at the second end of the mechanical arm, the fixed end of the telescopic part is connected with the bottom of the fixed part, the telescopic end of the telescopic part can move to the contraction position or the expansion position in the first direction, the top of the protection part is connected with the telescopic end of the telescopic part, and the rotating ball is rotationally connected to the bottom of the protection part and arranged on one side of the laser head assembly. When the telescopic end of the telescopic piece moves to the contraction position, the bottom end of the rotating ball protrudes out of the plane where the bottom end of the laser head assembly is located in the first direction. The invention provides a laser welding device which can effectively avoid damage caused by collision between a laser head and a welding surface and can more safely weld the uneven welding surface.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, and in particular to a laser welding device. Background Technology

[0002] Laser welding equipment uses a high-energy laser beam to locally heat and melt materials, achieving material connection through heat conduction or deep penetration welding. Current laser welding equipment requires adjusting the welding height of the control device when welding uneven surfaces. If the height is set improperly, the welding head can easily collide with the weld surface of the workpiece, causing damage to the welding head. Summary of the Invention

[0003] The purpose of this invention is to provide a laser welding device that can effectively avoid damage caused by collision between the laser head and the welding surface, and to weld uneven surfaces more safely.

[0004] To achieve the above objectives, the present invention provides a laser welding apparatus, comprising:

[0005] Base;

[0006] A robotic arm, the first end of which is mounted on the base;

[0007] A laser head assembly is mounted on the second end of the robotic arm and is arranged along a first direction;

[0008] A limiting component, comprising a fixing member, a telescopic member, a protective member, and a rotating ball;

[0009] The fixing member is installed at the second end of the robotic arm. The fixed end of the telescopic member is connected to the bottom of the fixing member. The telescopic end of the telescopic member extends and retracts along a first direction. The top of the protective member is connected to the telescopic end of the telescopic member. The rotating ball is rotatably connected to the bottom of the protective member. The bottom end of the rotating ball is close to the bottom end of the laser head assembly. In the first direction, the height of the bottom end of the rotating ball is always lower than the height of the bottom end of the laser head assembly.

[0010] Preferably, the fastener includes:

[0011] A fixing frame is installed at the second end of the robotic arm, and the fixing frame has a threaded hole that extends through in a first direction;

[0012] A threaded rod, which passes through the threaded hole along the first direction, and the bottom end of the threaded rod is connected to the fixed end of the telescopic member.

[0013] Preferably, the fastener further includes a threaded sleeve that extends along the first direction, with the top end of the threaded sleeve fixed to the bottom of the fastener, and the threaded sleeve and the threaded hole being coaxial, with the inner diameter of the threaded sleeve being the same as the diameter of the threaded hole.

[0014] The threaded rod is sequentially inserted into the threaded sleeve and the threaded hole along the first direction.

[0015] Preferably, it further includes:

[0016] A first fixed post, the axis of the first fixed post extends along the first direction, the first fixed post is installed at the second end of the robotic arm, a laser channel extending along the first direction is opened at the center of the first fixed post, a first fixing ring is provided on the side wall of the first fixed post in the circumferential direction, and a groove is opened inward at one part of the side wall of the first fixing ring.

[0017] The top surface of the laser head assembly has a downward-facing mounting groove, and the side wall of the mounting groove has a locking bolt. The locking bolt is used to pass through the groove and overlap the top surface of the first fixing ring when the first fixing ring is embedded in the mounting groove. The bottom surface of the mounting groove forms a laser port, which is used to communicate with the laser channel.

[0018] Preferably, the side wall of the mounting groove is provided with a groove, and a first spring post is installed in the groove. The first spring post extends radially along the mounting groove, the first end of the first spring post is connected to the bottom of the groove, and the second end of the first spring post is connected to the first side of the latch.

[0019] The side of the latch facing away from the first side is the second side, and the latch has an inclined surface that slopes from the second side towards the top surface.

[0020] Preferably, the laser head assembly includes:

[0021] A fixing sleeve, the axis of which extends along the first direction, and a retaining ring is provided on the inner sidewall of the fixing sleeve in the circumferential direction, and a positioning hole is formed on the inner side of the retaining ring.

[0022] The second fixing post has its axis extending along the first direction. The top surface of the second fixing post extends downward to form the laser port. The second fixing post passes through the positioning hole. The side wall of the second fixing post is provided with a second fixing ring along the circumferential direction. The second fixing ring overlaps the top surface of the retaining ring. The mounting groove is formed between the second fixing ring, the second fixing post, and the fixing sleeve.

[0023] A laser head, which extends along the first direction, has its top mounted on the bottom of the second fixed post, and is connected to the laser port.

[0024] Preferably, it further includes:

[0025] An arc head assembly is mounted on the second end of the robotic arm, and an angle is formed between the arc head assembly and the laser head assembly, the angle being adjustable.

[0026] Preferably, the arc head assembly includes:

[0027] An arc-shaped sleeve, the arc-shaped sleeve being in the shape of a circular arc, the first end of the arc-shaped sleeve being installed at the second end of the robotic arm, and the second end of the arc-shaped sleeve being provided with an opening;

[0028] An arc-shaped slider, the first end of which slides through the opening;

[0029] An arc head is connected to the second end of the arc-shaped slider, and the arc head and the laser head assembly form the included angle.

[0030] Preferably, a rotating seat is mounted on the base, the axis of the rotating seat extends along a first direction, and the first end of the robotic arm is mounted on the rotating seat.

[0031] Preferably, the robotic arm includes an operating arm and a driving arm. The first end of the operating arm is hinged to the rotary seat, and the hinge axis of the first end of the operating arm extends along a second direction. The first end of the driving arm is hinged to the second end of the operating arm, and the hinge axis of the first end of the driving arm extends along the second direction. The laser head assembly and the limiting assembly are mounted on the second end of the driving arm.

[0032] The first direction and the second direction intersect each other perpendicularly.

[0033] Compared with the prior art, the laser welding device of this invention has the following advantages:

[0034] The robotic arm is controlled to move, causing the laser head assembly to emit a laser beam for welding the surface of the workpiece. Since both the laser head assembly and the limiting assembly are mounted at the second end of the robotic arm, they can move synchronously.

[0035] In the initial state, the telescopic end of the connecting component between the fixing component and the protective component is in the extended position. A rotating ball is rotatably mounted on the bottom of the protective component. When the rotating ball and the protective component come into contact with the welding surface under the action of gravity, the telescopic component retracts to buffer the impact and prevent the rotating ball from rigidly impacting the welding surface. When the robotic arm moves the limiting component, the rotating ball can roll on the welding surface, and the rolling friction will not cause significant wear to the welding surface.

[0036] When the height of the welding surface increases in the first direction and it is about to collide with the bottom of the laser head assembly, the welding surface exerts an upward force on the rotating ball, which is located on one side of the laser head assembly, pushing the rotating ball and the protective component upward. This causes the telescopic end of the telescopic component to retract. When the telescopic end moves to the retracted position, the bottom of the rotating ball protrudes from the plane where the bottom of the laser head assembly is located in the first direction. At this time, the limiting component restricts the second end of the robotic arm from moving downward. Therefore, the laser head assembly will not collide with the welding surface, which is on the same plane as the bottom of the rotating ball. This effectively avoids collisions between the laser head assembly and the welding surface, preventing damage. During the welding process of the laser head assembly, the rotating ball always maintains contact with the welding surface. And because the telescopic end is in the retracted position, a stable distance is maintained between the welding surface and the laser head assembly, enabling safer welding of uneven surfaces. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the structure of the laser welding device described in an embodiment of the present invention;

[0038] Figure 2 This is a schematic diagram of the structure of the limiting component described in an embodiment of the present invention;

[0039] Figure 3 This is an assembly diagram of the first fixing post and laser head assembly described in an embodiment of the present invention;

[0040] Figure 4 This is an exploded view of the first fixing post and laser head assembly described in an embodiment of the present invention;

[0041] In the diagram, 1. Base; 2. Robotic arm; 21. Operating arm; 22. Drive arm; 3. Laser head assembly; 31. Clamp; 311. Inclined surface; 32. Fixing sleeve; 33. Retaining ring; 331. Positioning hole; 34. Second fixing post; 341. Laser port; 35. Second fixing ring; 36. Laser head; 37. Mounting slot; 4. Limiting assembly; 41. Fixing component; 411. Fixing frame; 412. Threaded rod; 413. Threaded sleeve; 414. Adjusting handwheel; 415. Connecting post; 42. Telescopic component; 421. Second spring post; 43. Protective component; 44. Rotating ball; 5. First fixing post; 51. Laser channel; 6. First fixing ring; 61. De-grooving; 7. Arc head assembly; 71. Arc sleeve; 72. Arc sliding component; 73. Arc head; 8. Rotating seat. Detailed Implementation

[0042] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0043] In the description of this invention, it should be understood that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this invention based on the specific circumstances.

[0044] In the description of this invention, it should be understood that the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," "longitudinal," "X-axis direction," "Y-axis direction," and "Z-axis direction," etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention. Moreover, some of the above terms, in addition to indicating orientations or positional relationships, may also be used to indicate other meanings; for example, the term "upper" may in some cases be used to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances.

[0045] like Figure 1-2As shown, a laser welding device according to an embodiment of the present invention includes: a base 1, a robotic arm 2, a laser head assembly 3, and a limiting assembly 4;

[0046] The first end of the robotic arm 2 is mounted on the base 1;

[0047] The laser head assembly 3 is mounted on the second end of the robotic arm 2, and the laser head assembly 3 is positioned along the first direction X.

[0048] The limiting component 4 includes a fixing member 41, a telescopic member 42, a protective member 43, and a rotating ball 44;

[0049] The fixing member 41 is installed at the second end of the robotic arm 2. The fixed end of the telescopic member 42 is connected to the bottom of the fixing member 41. The telescopic end of the telescopic member 42 can move to the retracted position or the extended position along the first direction X. The top of the protective member 43 is connected to the telescopic end of the telescopic member 42. The rotating ball 44 is rotatably connected to the bottom of the protective member 43. The rotating ball 44 is located on one side of the laser head assembly 3. When the telescopic end of the telescopic member 42 moves to the retracted position, the bottom end of the rotating ball 44 protrudes from the plane where the bottom end of the laser head assembly 3 is located along the first direction X.

[0050] It should be noted that the movement of the robotic arm 2 is controlled to move the laser head assembly 3 to emit a laser beam for welding the welding surface of the workpiece. Since both the laser head assembly 3 and the limiting assembly 4 are mounted on the second end of the robotic arm 2, they can move synchronously.

[0051] In the initial state, the telescopic end of the telescopic member 42 connecting the fixing member 41 and the protective member 43 is in the extended position. A rotating ball 44 is rotatably mounted on the bottom of the protective member 43. When the rotating ball 44 and the protective member 43 come into contact with the welding surface under gravity, the telescopic member 42 retracts to buffer the impact, preventing the rotating ball 44 from rigidly impacting the welding surface. When the robotic arm 2 moves the limiting component 4, the rotating ball 44 can roll on the welding surface; the rolling friction does not cause significant wear to the welding surface.

[0052] When the height of the welding surface increases in the first direction X and it is about to collide with the bottom of the laser head assembly 3, since the rotating ball 44 is located on one side of the laser head assembly 3, the welding surface applies an upward force to the rotating ball 44, pushing the rotating ball 44 and the protective member 43 upward. As a result, the telescopic end of the telescopic member 42 retracts. When the telescopic end moves to the retracted position, the bottom end of the rotating ball 44 protrudes from the plane where the bottom end of the laser head assembly 3 is located along the first direction X. At this time, the limiting component 4 restricts the second end of the robotic arm 2 from moving downward. Therefore, the laser head assembly 3 will not collide with the welding surface that is on the same plane as the bottom end of the rotating ball 44, effectively avoiding damage caused by the collision between the laser head assembly 3 and the welding surface. During the welding process of the laser head assembly 3, the rotating ball 44 always maintains contact with the welding surface, and since the telescopic end is in the retracted position, a stable distance is maintained between the welding surface and the laser head assembly 3, which can more safely weld uneven welding surfaces.

[0053] In addition, since the bottom of the limiting component 4 is a rotating ball 44, and the rotating ball 44 is rotatably connected to the bottom of the protective component 43, when the rotating ball 44 contacts the welding surface and moves along the welding surface, the rotating ball 44 rotates relative to the welding surface, which can reduce the damage to the welding surface caused by the rotating ball 44 during its movement.

[0054] like Figure 1-2 As shown, in this embodiment, the fixing member 41 further includes a fixing frame 411 and a threaded rod 412;

[0055] The fixing frame 411 is installed at the second end of the robotic arm 2. The fixing frame 411 has a threaded hole that passes through in the first direction X. The threaded rod 412 passes through the threaded hole in the first direction X. The bottom end of the threaded rod 412 is connected to the fixed end of the telescopic member 42.

[0056] It should be noted that the fixing frame 411 is installed at the second end of the robotic arm 2, and the threaded rod 412 passes through the threaded hole on the fixing frame 411 along the first direction X. Since the bottom end of the threaded rod 412 is connected to the fixed end of the telescopic member 42, rotating the threaded rod 412 back and forth along the first direction X can drive the telescopic member 42, the protective member 43 and the rotating ball 44 to move synchronously, so as to adjust the distance of the bottom end of the rotating ball 44 relative to the second end of the robotic arm 2 in the first direction X. This can adapt to laser head assembly 3 of different heights, ensure that when the telescopic end of the telescopic member 42 is retracted to the retracted position, the bottom end of the rotating ball 44 protrudes from the plane where the bottom end of the laser head assembly 3 is located along the first direction X, and can adjust the minimum distance between the bottom end of the laser head assembly 3 and the welding surface.

[0057] like Figure 1-2As shown, in this embodiment, the fixing member 41 further includes a threaded sleeve 413, which extends along the first direction X. The top end of the threaded sleeve 413 is fixed to the bottom of the fixing bracket 411. The threaded sleeve 413 and the threaded hole are coaxial, and the inner diameter of the threaded sleeve 413 is the same as the diameter of the threaded hole. The threaded rod 412 passes through the threaded sleeve 413 and the threaded hole in sequence along the first direction X.

[0058] It should be noted that the top end of the threaded sleeve 413 extending along the first direction X is fixed to the bottom of the fixing bracket 411. The threaded sleeve 413 and the threaded hole are coaxial, and the inner diameter of the threaded sleeve 413 is the same as the diameter of the threaded hole. The threaded rod 412 passes through the threaded sleeve 413 and the threaded hole in sequence along the first direction X. Therefore, the threaded rod 412 can move back and forth more stably along the first direction X and is not easy to skew.

[0059] like Figure 2 As shown, the fixing member 41 further includes a connecting post 415, the top end of which is connected to the bottom end of the threaded rod 412, and the bottom end of which is connected to the fixed end of the telescopic member 42. By setting the connecting post 415 between the threaded rod 412 and the telescopic member 42, the structure is more stable.

[0060] like Figure 2 As shown, further, the top of the threaded rod 412 is provided with an adjusting handwheel 414.

[0061] It should be noted that the top of the threaded rod 412 is provided with an adjusting handwheel 414, which makes it convenient for the operator to hold and rotate the threaded rod 412 to drive the threaded rod 412 to move back and forth along the first direction X.

[0062] like Figure 2 As shown, in this embodiment, the telescopic member 42 further includes a second spring post 421, which extends along the first direction X. The first end of the second spring post 421 is connected to the bottom of the fixing member 41, and the second end of the second spring post 421 is connected to the top of the protective member 43.

[0063] It should be noted that the second spring column 421 uses the principle of a spring to achieve the telescopic function. The structure is relatively simple, the size is small, and it is easy to install and maintain.

[0064] In another embodiment, the telescopic member 42 further includes an outer tube and an inner tube, the first end of the outer tube is connected to the bottom of the fixing member 41, the first end of the inner tube is slidably inserted through the second end of the outer tube, and the second end of the inner tube is connected to the top of the protective member 43.

[0065] like Figure 1 , 3As shown in Figure 4, in this embodiment, it further includes: a first fixing post 5, the axis of the first fixing post 5 extends along the first direction X, the first fixing post 5 is installed at the second end of the robotic arm 2, a laser channel 51 extending along the first direction X is opened at the center of the first fixing post 5, a first fixing ring 6 is provided on the side wall of the first fixing post 5 in the circumferential direction, and a groove 61 is opened inward at one part of the side wall of the first fixing ring 6.

[0066] The top surface of the laser head assembly 3 has a downward-facing mounting groove 37. The side wall of the mounting groove 37 has a latch 31. The latch 31 is used to pass through the slot 61 and overlap the top surface of the first fixing ring 6 when the first fixing ring 6 is embedded in the mounting groove 37. The bottom surface of the mounting groove 37 extends downward to form a laser port 341, which is used to communicate with the laser channel 51.

[0067] It should be noted that, in order to enable the detachable installation of the robotic arm 2 and the laser head assembly 3, a first fixing post 5 is installed at the second end of the robotic arm 2, and a laser channel 51 extending along the first direction X is opened at the center of the first fixing post 5 for the laser beam to pass through.

[0068] The top surface of the laser head assembly 3 has a downward-facing mounting groove 37. When the mounting groove 37 is fitted onto the outside of the first fixing post 5, the first fixing ring 6, which is circumferentially arranged on the side wall of the first fixing post 5, is embedded in the mounting groove 37. After the latch 31 on the side wall of the mounting groove 37 passes through the groove 61 of the first fixing ring 6, the laser head assembly 3 is rotated so that the latch 31 overlaps the top surface of the first fixing ring 6, thereby completing the installation of the first fixing post 5 and the laser head assembly 3. The bottom surface of the mounting groove 37 extends downward to form a laser port 341. When the first fixing post 5 and the laser head assembly 3 are installed, the laser port 341 is connected to the laser channel 51 and can receive the laser beam from the laser channel 51.

[0069] The mounting groove 37 has two symmetrical latches 31 on its side wall. The two symmetrical latches 31 are engaged with the first fixing ring 6 for limiting the position, which can improve the stability of the assembly of the first fixing post 5 and the laser head assembly 3. Correspondingly, the side wall of the first fixing ring 6 has two release grooves 61. When it is necessary to remove the laser head assembly 3 from the first fixing post 5, the two latches 31 can correspond to the two release grooves 61 one by one and pass through, so that the laser head assembly 3 can be removed from the first fixing post 5.

[0070] like Figure 3-4 As shown, in this embodiment, the side wall of the mounting groove 37 is further provided with a groove (not shown in the figure), and a first spring post (not shown in the figure) is installed in the groove. The first spring post extends radially along the mounting groove 37, the first end of the first spring post is connected to the bottom of the groove, and the second end of the first spring post is connected to the first side of the latch 31.

[0071] The side of the latch 31 facing away from the first side is the second side, and the latch 31 is provided with an inclined surface 311 that slopes from the second side towards the top surface.

[0072] It should be noted that when installing the laser head assembly 3 onto the first fixed post 5, it is difficult to align the latch 31 and the slot 61 for installation. Furthermore, adjusting the rotating laser head assembly 3 so that the latch 31 is aligned with the slot 61 requires fine adjustments, which takes a considerable amount of time.

[0073] To expedite the installation of the laser head assembly 3 and the first fixing post 5, the latch 31 is designed as a first spring post connected to the groove on the first side. The latch has an inclined surface 311 that slopes from the second side to the top surface. When the latch 31 is not aligned with the disengagement groove 61, the side wall of the first fixing ring 6 contacts the latch 31 and slides along the inclined surface 311 of the latch 31, pushing the latch 31 into the groove. At this time, the first spring post is compressed. When the first fixing ring 6 slides out of the latch 31, the first spring post returns to its original position, and the latch 31 overlaps the top surface of the first fixing ring 6, enabling rapid assembly of the laser head assembly 3 and the first fixing post 5.

[0074] In order to prevent the laser head assembly 3 and the first fixing post 5 from falling off after installation, the latch 31 is only provided with an inclined surface 311 that slopes from the second side to the top. Therefore, when the first fixing ring 6 is below the latch 31, it is impossible to push the latch 31 into the groove. The latch 31 can only be dislodged from the groove 61 by rotating the laser head assembly 3.

[0075] like Figure 1 , 3 As shown in Figure 4, in this embodiment, the laser head assembly 3 further includes: a fixing sleeve 32, a second fixing post 34, and a laser head 36;

[0076] The axis of the fixing sleeve 32 extends along the first direction X, and the inner sidewall of the fixing sleeve 32 is provided with a retaining ring 33 in the circumferential direction, and the inner side of the retaining ring 33 forms a positioning hole 331.

[0077] The axis of the second fixing post 34 extends along the first direction X. The top surface of the second fixing post 34 extends downward to form a laser port 341. The second fixing post 34 passes through the positioning hole 331. The side wall of the second fixing post 34 is provided with a second fixing ring 35 in the circumferential direction. The second fixing ring 35 overlaps the top surface of the retaining ring 33. An installation groove 37 is formed between the second fixing ring 35, the second fixing post 34 and the fixing sleeve 32.

[0078] The laser head 36 extends along the first direction X, and the top of the laser head 36 is mounted on the bottom of the second fixed post 34. The laser head 36 is connected to the laser port 341.

[0079] It should be noted that the laser head assembly 3 includes a fixing sleeve 32, a second fixing post 34, and a laser head 36. The inner sidewall of the fixing sleeve 32 is provided with a retaining ring 33 along the circumferential direction. The second fixing post 34 passes through the positioning hole 331 formed inside the retaining ring 33, and the second fixing ring 35 along the circumferential direction of the sidewall of the second fixing post 34 overlaps the top surface of the retaining ring 33, thereby fixing the fixing sleeve 32 and the second fixing post 34. Therefore, an installation groove 37 is formed between the second fixing ring 35, the second fixing post 34, and the fixing sleeve 32, which can be detached and connected to the first fixing post 5.

[0080] The top surface of the second fixing post 34 has a laser hole extending downwards, thus connecting the mounting groove 37 and the laser port 341. The laser channel 51 of the first fixing post 5, installed in the mounting groove 37, can connect to the laser port 341. The top of the laser head 36 is installed at the bottom of the second fixing post 34, and the laser head 36 is also connected to the laser port 341. Therefore, the laser beam can pass through the laser channel 51 and the laser port 341 in sequence and enter the laser head 36.

[0081] In addition, since the second fixing post 34 is connected to the fixing sleeve 32 through the overlap of the second fixing ring 35 and the retaining ring 33, the second fixing post 34 can rotate. Thus, after the laser head assembly 3 is installed on the first fixing post 5, the laser head 36 can also rotate to achieve welding.

[0082] like Figure 1 As shown, in this embodiment, it further includes an arc head assembly 7, which is installed at the second end of the robotic arm 2. An angle is formed between the arc head assembly 7 and the laser head assembly 3, and the angle is adjustable.

[0083] It should be noted that the combination of the arc head assembly 7 and the laser head assembly 3 enables laser-arc hybrid welding, which can utilize the characteristics of both laser and arc to compensate for each other's shortcomings and improve the welding effect.

[0084] The arc head assembly 7 is installed at the second end of the robotic arm 2 and forms an angle with the laser head assembly 3, which can weld at the same welding position. The angle is adjustable, which can adjust the angle at which the arc head assembly 7 emits the arc to adapt to laser-arc hybrid welding in different scenarios.

[0085] like Figure 1 As shown, in this embodiment, the arc head assembly 7 further includes: an arc sleeve 71, an arc slider 72, and an arc head 73;

[0086] The arc sleeve 71 is in the shape of a circular arc arch. The first end of the arc sleeve 71 is installed at the second end of the robotic arm 2. The second end of the arc sleeve 71 has an opening. The first end of the arc sliding member 72 slides through the opening. The arc head 73 is connected to the second end of the arc sliding member 72. An angle is formed between the arc head 73 and the laser head assembly 3.

[0087] It should be noted that the angle between the arc head 73 and the laser head assembly 3 can be adjusted by adjusting the degree to which the arc-shaped slider 72 slides out of the arc-shaped sleeve 71.

[0088] like Figure 1 As shown, in this embodiment, a rotating seat 8 is further mounted on the base 1, the axis of the rotating seat 8 extends along the first direction X, and the first end of the robotic arm 2 is mounted on the rotating seat 8.

[0089] It should be noted that a rotating seat 8 is mounted on the base 1, and the axis of the rotating seat 8 extends along the first direction X. The first end of the robotic arm 2 is mounted on the rotating seat 8, so the robotic arm 2 can rotate about the axis of the rotating seat 8.

[0090] like Figure 1 As shown, in this embodiment, the robotic arm 2 further includes an operating arm 21 and a driving arm 22. The first end of the operating arm 21 is hinged to the rotary seat 8, and the hinge axis of the first end of the operating arm 21 extends along the second direction Y. The first end of the driving arm 22 is hinged to the second end of the operating arm 21, and the hinge axis of the first end of the driving arm 22 extends along the second direction Y. The laser head assembly 3 and the limiting assembly 4 are installed at the second end of the driving arm 22.

[0091] Among them, the first direction X and the second direction Y intersect each other perpendicularly.

[0092] It should be noted that the operating arm 21 can swing relative to the rotating seat 8 along the axis extending in the second direction Y, and the drive arm 22 can swing relative to the operating arm 21 along the axis extending in the second direction Y, so that the mechanical arm 2 has a wider range of motion and can move the laser head assembly 3 to work in a wider range of positions.

[0093] The working process of this invention is as follows: controlling the movement of the robotic arm 2 causes the laser head assembly 3 to move and emit a laser beam to weld the surface of the workpiece. Since both the laser head assembly 3 and the limiting assembly 4 are mounted on the second end of the robotic arm 2, the laser head assembly 3 and the limiting assembly 4 can move synchronously.

[0094] In the initial state, the telescopic end of the telescopic member 42 connecting the fixing member 41 and the protective member 43 is in the extended position. A rotating ball 44 is rotatably mounted on the bottom of the protective member 43. When the rotating ball 44 and the protective member 43 come into contact with the welding surface under gravity, the telescopic member 42 retracts to buffer the impact, preventing the rotating ball 44 from rigidly impacting the welding surface. When the robotic arm 2 moves the limiting component 4, the rotating ball 44 can roll on the welding surface; the rolling friction does not cause significant wear to the welding surface.

[0095] When the height of the welding surface increases in the first direction X and it is about to collide with the bottom of the laser head assembly 3, since the rotating ball 44 is located on one side of the laser head assembly 3, the welding surface applies an upward force to the rotating ball 44, pushing the rotating ball 44 and the protective member 43 upward. As a result, the telescopic end of the telescopic member 42 retracts. When the telescopic end moves to the retracted position, the bottom end of the rotating ball 44 protrudes from the plane where the bottom end of the laser head assembly 3 is located along the first direction X. At this time, the limiting component 4 restricts the second end of the robotic arm 2 from moving downward. Therefore, the laser head assembly 3 will not collide with the welding surface that is on the same plane as the bottom end of the rotating ball 44, effectively avoiding damage caused by the collision between the laser head assembly 3 and the welding surface. During the welding process of the laser head assembly 3, the rotating ball 44 always maintains contact with the welding surface, and since the telescopic end is in the retracted position, a stable distance is maintained between the welding surface and the laser head assembly 3, which can more safely weld uneven welding surfaces.

[0096] In summary, the embodiments of the present invention provide a laser welding device that effectively avoids damage caused by collision between the laser head and the workpiece, and makes it easier to weld uneven surfaces.

[0097] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make several improvements and substitutions without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A laser welding apparatus, characterized in that, include: Base; A robotic arm, the first end of which is mounted on the base; A laser head assembly is mounted on the second end of the robotic arm and is arranged along a first direction; A limiting component, comprising a fixing member, a telescopic member, a protective member, and a rotating ball; The fixing member is installed at the second end of the robotic arm. The fixed end of the telescopic member is connected to the bottom of the fixing member. The telescopic end of the telescopic member can move to a retracted position or an extended position along a first direction. The top of the protective member is connected to the telescopic end of the telescopic member. The rotating ball is rotatably connected to the bottom of the protective member. The rotating ball is located on one side of the laser head assembly. When the telescopic end of the telescopic member moves to the retracted position, the bottom end of the rotating ball protrudes from the plane where the bottom end of the laser head assembly is located along the first direction.

2. The laser welding apparatus according to claim 1, characterized in that, The fastener includes: A fixing frame is installed at the second end of the robotic arm, and the fixing frame has a threaded hole that extends through in a first direction; A threaded rod, which passes through the threaded hole along the first direction, and the bottom end of the threaded rod is connected to the fixed end of the telescopic member.

3. The laser welding apparatus according to claim 2, characterized in that, The fastener also includes a threaded sleeve that extends along the first direction. The top end of the threaded sleeve is fixed to the bottom of the fastener. The threaded sleeve and the threaded hole are coaxial, and the inner diameter of the threaded sleeve is the same as the diameter of the threaded hole. The threaded rod is sequentially inserted into the threaded sleeve and the threaded hole along the first direction.

4. The laser welding apparatus according to claim 1, characterized in that, Also includes: A first fixed post, the axis of the first fixed post extends along the first direction, the first fixed post is installed at the second end of the robotic arm, a laser channel extending along the first direction is opened at the center of the first fixed post, a first fixing ring is provided on the side wall of the first fixed post in the circumferential direction, and a groove is opened inward at one part of the side wall of the first fixing ring. The top surface of the laser head assembly has a downward-facing mounting groove, and the side wall of the mounting groove has a locking bolt. The locking bolt is used to pass through the groove and overlap the top surface of the first fixing ring when the first fixing ring is embedded in the mounting groove. The bottom surface of the mounting groove forms a laser port, which is used to communicate with the laser channel.

5. The laser welding apparatus according to claim 4, characterized in that, The mounting groove has a groove on its side wall, and a first spring post is installed in the groove. The first spring post extends radially along the mounting groove. The first end of the first spring post is connected to the bottom of the groove, and the second end of the first spring post is connected to the first side of the latch. The side of the latch facing away from the first side is the second side, and the latch has an inclined surface that slopes from the second side towards the top surface.

6. The laser welding apparatus according to claim 4, characterized in that, The laser head assembly includes: A fixing sleeve, the axis of which extends along the first direction, and a retaining ring is provided on the inner sidewall of the fixing sleeve in the circumferential direction, and a positioning hole is formed on the inner side of the retaining ring. The second fixing post has its axis extending along the first direction. The top surface of the second fixing post extends downward to form the laser port. The second fixing post passes through the positioning hole. The side wall of the second fixing post is provided with a second fixing ring along the circumferential direction. The second fixing ring overlaps the top surface of the retaining ring. The mounting groove is formed between the second fixing ring, the second fixing post, and the fixing sleeve. A laser head, which extends along the first direction, has its top mounted on the bottom of the second fixed post, and is connected to the laser port.

7. The laser welding apparatus according to claim 1, characterized in that, Also includes: An arc head assembly is mounted on the second end of the robotic arm, and an angle is formed between the arc head assembly and the laser head assembly, the angle being adjustable.

8. The laser welding apparatus according to claim 7, characterized in that, The arc head assembly includes: An arc-shaped sleeve, the arc-shaped sleeve being in the shape of a circular arc, the first end of the arc-shaped sleeve being installed at the second end of the robotic arm, and the second end of the arc-shaped sleeve being provided with an opening; An arc-shaped slider, the first end of which slides through the opening; An arc head is connected to the second end of the arc-shaped slider, and the arc head and the laser head assembly form the included angle.

9. The laser welding apparatus according to claim 1, characterized in that, A rotating seat is mounted on the base, the axis of which extends along a first direction, and the first end of the robotic arm is mounted on the rotating seat.

10. The laser welding apparatus according to claim 9, characterized in that, The robotic arm includes an operating arm and a driving arm. The first end of the operating arm is hinged to the rotating base, and the hinge axis of the first end of the operating arm extends along a second direction. The first end of the driving arm is hinged to the second end of the operating arm, and the hinge axis of the first end of the driving arm extends along the second direction. The laser head assembly and the limiting assembly are mounted on the second end of the driving arm. The first direction and the second direction intersect each other perpendicularly.

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