A laser lens focus calibration device for laser welding

Abstract

The present invention provides that the present invention is realized by the following technical scheme: a laser lens group focus calibration device for laser welding, comprising a laser scanning lens group and a fine adjustment mechanism, the laser scanning lens group has a magnetically attracted coarse adjustment mechanism; the coarse adjustment mechanism comprises a first free guide arm, a fixing member, and a second free guide arm, the fixing member has the first free guide arm symmetrically fixed on both sides, and the fixing member has the second free guide arm fixed at the bottom center. The advantages of the present invention are that, on the one hand, during use, the focus calibration device can be connected to any position on the laser scanning lens group for temporary storage, which is convenient for users to quickly locate the focus calibration device, and on the other hand, the focus calibration device can be adjusted in a larger range, with a wider range of application, and can also accurately indicate the position of the focus.

Description

Technical Field

[0001] The invention relates to the technical field of laser cutting equipment, in particular to a laser lens group focus calibration device for laser welding. Background Art

[0002] During the use of industrial robots, different tools are often installed on the flange surface at the end of the robot to meet actual production needs. In order to accurately control the position and posture of the tool movement, the coordinate system where the tool is located needs to be calibrated.

[0003] The current laser welding laser lens focus calibration device has a fixed installation position, which makes it difficult to adjust some tricky angles. In addition, due to the length of the adjustment device and the limited moving range, some positions are difficult to mark, limiting the actual scope of use. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a laser lens focus calibration device for laser welding, which can be adjusted over a larger range and has a wider range of applications. In addition, it can also accurately indicate the position of the focus.

[0005] In order to achieve the above object, the technical solution of the present invention is as follows:

[0006] The present invention is realized by the following technical solution: a laser lens group focus calibration device for laser welding, comprising a laser scanning lens group and a fine adjustment mechanism, wherein the laser scanning lens group is magnetically attracted to the coarse adjustment mechanism;

[0007] The coarse adjustment mechanism comprises a first free guide arm, a fixing member, and a second free guide arm, wherein the first free guide arms are symmetrically fixed on both sides of the fixing member, and the second free guide arm is fixed at the center of the bottom of the fixing member;

[0008] A fine adjustment mechanism is provided at the bottom of the second free guide arm, and a pointer is provided on the fine adjustment mechanism. The coarse adjustment mechanism adjusts the pointer position in a large range, and the fine adjustment mechanism adjusts the pointer position in a small range.

[0009] Preferably, a magnetic seat is fixed on the top of the first free guide arm, and the magnetic seat is suction-engaged and arranged on the laser scanning mirror group to limit the overall position of the coarse adjustment mechanism.

[0010] Preferably, a groove is provided in the middle portion of the top of the magnetic base, and the top of the magnetic base is a planar structure located on both sides of the groove.

[0011] Preferably, the first free guide arm and the second free guide arm have the same mechanism;

[0012] The first free guide arm includes a first rotating pair, a first connecting rod, a second rotating pair, a locking handle, a second connecting rod and a third rotating pair. A second rotating pair is provided between one end of the first connecting rod and the second connecting rod. A locking handle for locking the rotation of the second rotating pair is provided on the second rotating pair. A first rotating pair is provided at the other end of the first connecting rod, and a third rotating pair is provided at the other end of the second connecting rod.

[0013] Preferably, the first rotation pair and the third rotation pair have the same structure;

[0014] The first rotation pair comprises a spherical groove tube and a ball rod, wherein the spherical groove tube is fixed on the first connecting rod, the spherical end of the ball rod is connected to the spherical groove tube, and the ball rod is located in the spherical groove tube and rotates freely.

[0015] Preferably, the second rotating pair includes a connecting shaft, a fixing ring is fixed to the middle part of the connecting shaft, a first connecting sleeve is rotatably connected to the connecting shaft on one side of the fixing ring, a limiting plate is provided in the end of the fixing ring in the first connecting sleeve, and the limiting plate limits the first connecting sleeve from separating from the connecting shaft, a second connecting sleeve is fixed to the other side of the fixing ring on the connecting shaft, a first connecting rod is fixedly connected to the first connecting sleeve, and a second connecting rod is fixedly connected to the second connecting sleeve.

[0016] Preferably, the fixing member includes a fixing seat, a connecting hole and a connecting groove, the first free guide arm is bolted to both sides of the fixing seat, the second free guide arm is bolted to the bottom center of the fixing seat, connecting holes are symmetrically provided on both sides of the fixing seat, and connecting grooves connected to the connecting holes are provided at both ends of the fixing seat.

[0017] Preferably, the fine adjustment mechanism comprises a base, a fixed block, a slide block and a pointer seat, a fixed ball is provided at one end of the contact surface between the base and the pointer seat, a positioning pin and a tension spring are provided on both sides between the base and the pointer seat away from the fixed ball, the tension spring passes through the base to connect the positioning pin, the positioning pin is fixed on the fixed ball, and one end of the two tension springs are respectively connected to the first adjustment handle and the third adjustment handle;

[0018] A pointer clamping head is fixed on the pointer seat, and a pointer is fixed on the pointer clamping head;

[0019] A slide block is slidably arranged in the middle part of the base, a compression spring is arranged in the slide block, the compression spring is engaged in the base, one end of the compression spring is fixedly connected to the base, and the other end of the compression spring is connected to the second adjustment handle, and a limiting hole connected to the second free guide arm is opened on the slide block;

[0020] A fixing block for limiting the sliding rail block to move back and forth in a single direction is fixed on the base.

[0021] Preferably, V-shaped grooves are provided on the contact surfaces of the base, the slide block and the fixed block, balls are slidably arranged in the V-shaped grooves, retaining frames are provided between the base and the slide block and between the slide block and the fixed block, and the retaining frames engage the balls.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. On the one hand, during use, the focus calibration device can be connected to any position on the laser scanning lens group for temporary storage, which is convenient for users to quickly locate the focus calibration device. On the other hand, the focus calibration device can be adjusted over a larger range, with a wider range of applications. In addition, the focus position can be accurately indicated.

[0024] 2. Through the setting of the coarse adjustment mechanism and the fine adjustment mechanism, the pointer can adjust the position more accurately, the laser focus indicates the position accurately, the robot adjustment effect is better, and the quality of laser welding of the processed parts in the later stage is higher; BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The disclosure of the present invention is described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In the drawings, the same reference numerals are used to refer to the same components. Among them:

[0026] Figure 1 It is a schematic diagram of the overall structure of the laser lens focus calibration device for laser welding of the present invention;

[0027] Figure 2 It is a schematic structural diagram of the connection between the first free guide arm, the fixing member and the second free guide arm of the present invention;

[0028] Figure 3 It is a schematic structural diagram of the first free guide arm and the second free guide arm of the present invention;

[0029] Figure 4 It is a schematic diagram of the second rotating pair structure of the present invention;

[0030] Figure 5 It is a schematic diagram of the structure of the fixing member of the present invention;

[0031] Figure 6 It is a structural schematic diagram of the fine adjustment mechanism of the present invention;

[0032] Figure 7 It is an exploded view of the fine adjustment mechanism of the present invention.

[0033] Notes in the figure: 10, laser scanning mirror group; 20, first free guide arm; 21, first rotation pair; 22, first connecting rod; 23, second rotation pair; 231, connecting shaft; 232, fixing ring; 233, limiting plate; 234, first connecting sleeve; 235, second connecting sleeve; 24, locking handle; 25, second connecting rod; 26, third rotation pair; 30, fixing member; 31, fixing seat; 32, connecting hole; 33, connecting groove; 40, second Free guide arm; 50, fine adjustment mechanism; 501, fixed ball; 502, positioning pin; 503, tension spring; 51, base; 511, pointer clamping head; 52, fixed block; 53, slide block; 531, V-shaped slide groove; 532, limit hole; 533, compression spring; 54, pointer seat; 55, first adjustment handle; 56, second adjustment handle; 57, third adjustment handle; 58, retaining frame; 59, ball; 60, magnetic seat; 70, pointer. DETAILED DESCRIPTION

[0034] It is easy to understand that according to the technical solution of the present invention, without changing the essential spirit of the present invention, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as the whole of the present invention or as a limitation or restriction to the technical solution of the present invention.

[0035] like Figure 1-2 As shown, as a laser lens group focus calibration device for laser welding of the present invention, it includes a laser scanning lens group 10 and a fine adjustment mechanism 50, and a magnetically attracted coarse adjustment mechanism on the laser scanning lens group 10;

[0036] The coarse adjustment mechanism includes a first free guide arm 20, a fixing member 30, and a second free guide arm 40. The first free guide arms 20 are symmetrically fixed on both sides of the fixing member 30, and the second free guide arm 40 is fixed at the center of the bottom of the fixing member 30. With this structural arrangement, on the one hand, during use, the focus calibration device can be connected to any position on the laser scanning lens group 10 for temporary storage, which is convenient for users to quickly locate the focus calibration device. On the other hand, the focus calibration device can be adjusted in a larger range, with a wider range of applications. In addition, the focus position can be accurately indicated, and the use effect is better.

[0037] The laser scanning mirror assembly 10 is provided with a magnetically attracted coarse adjustment mechanism. This structural arrangement can improve the efficiency of installing and removing the focus calibration device, making it easier for users to operate.

[0038] A fine adjustment mechanism 50 is provided at the bottom of the second free guide arm 40 , and a pointer 70 is provided on the fine adjustment mechanism 50 . The coarse adjustment mechanism adjusts the position of the pointer 70 in a large range, and the fine adjustment mechanism 50 adjusts the position of the pointer 70 in a small range.

[0039] This structural setting can accurately adjust the position of the pointer 70, making the indicated position of the focus more accurate, the position of the robot arm and the activity path more accurately adjusted, and the laser welding effect better.

[0040] like Figure 3 As shown, a magnetic base 60 is fixed on the top of the first free guide arm 20, and the magnetic base 60 is suction-engaged and arranged on the laser scanning mirror group 10 to limit the overall position of the coarse adjustment mechanism.

[0041] By setting the magnetic base 60, the focus calibration device can be placed more flexibly. The focus calibration device can be placed on the laser scanning lens group 10 at a suitable position. On the one hand, it has a wider range of applications. On the other hand, it is more convenient to install and disassemble the focus calibration device, which can improve the installation and disassembly efficiency.

[0042] like Figure 3 As shown, a groove is provided in the middle of the top of the magnetic base 60, and the top of the magnetic base 60 is located on both sides of the groove and is a flat structure. This structural setting makes the magnetic base 60 suitable for some raised parts on the laser scanning mirror group 10, and the installation and fixing range of the focus calibration device is wider.

[0043] like Figure 2-3 As shown, the first free guide arm 20 and the second free guide arm 40 have the same structure;

[0044] The first free guide arm 20 includes a first rotating pair 21, a first connecting rod 22, a second rotating pair 23, a locking handle 24, a second connecting rod 25 and a third rotating pair 26. The second rotating pair 23 is provided between one end of the first connecting rod 22 and the second connecting rod 25. The second rotating pair 23 is provided with a locking handle 24 for locking the rotation of the second rotating pair 23. The other end of the first connecting rod 22 is provided with the first rotating pair 21, and the other end of the second connecting rod 25 is provided with the third rotating pair 26.

[0045] By setting up multiple rotating pairs, the first free guide arm 20 and the second free guide arm 40 can have more rotating angles, more adjustment methods for the pointer 70, more rotating angles, and a better adjustment effect of the pointer 70; a second rotating pair 23 is provided between one end of the first connecting rod 22 and the second connecting rod 25, which can make the first free guide arm 20 and the second free guide arm 40 have a longer rotation path, a larger adjustment range, and a better adjustment effect of the pointer 70; a first rotating pair 21 is provided at the other end of the first connecting rod 22, and a third rotating pair 26 is provided at the other end of the second connecting rod 25, which can further expand the rotation angle of the first connecting rod 22 and the second connecting rod 25, thereby further facilitating the user to adjust the pointer 70.

[0046] like Figure 2-3As shown, the first rotation pair 21 and the third rotation pair 26 have the same structure;

[0047] The first rotating pair 21 includes a spherical groove tube and a ball rod. The spherical groove tube is fixed on the first connecting rod 22. The spherical end of the ball rod is connected to the spherical groove tube. The ball rod is located in the spherical groove tube and rotates freely. This structural setting can make the rotation angle of the first free guide arm 20 and the second free guide arm 40 larger and the application range wider. The contact surfaces of the spherical groove tube and the ball rod are both provided with a concave-convex layer, which can make the friction resistance of the ball rod between the spherical groove tube larger. When the ball rod is rotated to a suitable position, the position between the ball rod and the spherical groove tube will be relatively stable without shaking, and the pointer position of the pointer 70 will be more accurate.

[0048] like Figure 4 As shown, the second rotating pair 23 includes a connecting shaft 231, a fixing ring 232 is fixed to the middle part of the connecting shaft 231, a first connecting sleeve 234 is rotatably connected to the connecting shaft 231 on one side of the fixing ring 232, a limiting plate 233 is provided in the first connecting sleeve 234 at the end of the fixing ring 232, and the limiting plate 233 restricts the first connecting sleeve 234 from separating from the connecting shaft 231, a second connecting sleeve 235 is fixed to the connecting shaft 231 on the other side of the fixing ring 232, the first connecting sleeve 234 is fixedly connected to the first connecting rod 22, and the second connecting sleeve 235 is fixedly connected to the second connecting rod 25.

[0049] Specifically, the first connecting sleeve 234 and the connecting shaft 231 can rotate relative to each other, so as to adjust the relative angle between the first connecting rod 22 and the second connecting rod 25, so that the rotation adjustment range of the first free guide arm 20 and the second free guide arm 40 is wider. When the second rotating pair 23 is limited as a whole, the locking handle 24 can be rotated to limit the position of the first connecting sleeve 234 relative to the connecting shaft 231. No rotation occurs between the two, and the second rotating pair 23 can be locked. This method can facilitate users to adjust the position of the first connecting rod 22 and the second connecting rod 25, and the use effect is better.

[0050] like Figure 5 As shown, the fixing member 30 includes a fixing seat 31, a connecting hole 32 and a connecting groove 33. The fixing seat 31 is bolted to the first free guide arm 20 on both sides, and the fixing seat 31 is bolted to the second free guide arm 40 at the bottom center. The fixing seat 31 has connecting holes 32 symmetrically opened on both sides, and connecting grooves 33 connected to the connecting holes 32 are opened at both ends of the fixing seat 31.

[0051] The first free guide arm 20 and the second free guide arm 40 are fixed to the fixing seat 31 by bolts, which can make the installation position of the first free guide arm 20 and the second free guide arm 40 more stable; the fixing seat 31 is symmetrically provided with connecting holes 32 on both sides, and other rod-shaped components can be placed in the connecting holes 32 to temporarily limit the fixing seat 31. This structure can make the focus calibration device more connected in various ways, and its scope of application is further improved.

[0052] like Figure 6-7 As shown, the fine adjustment mechanism 50 includes a base 51, a fixed block 52, a slide block 53 and a pointer seat 54. A fixed ball 501 is provided at one end of the contact surface between the base 51 and the pointer seat 54. A positioning pin 502 and a tension spring 503 are provided on both sides between the base 51 and the pointer seat 54 away from the fixed ball 501. The tension spring 503 passes through the base 51 and is connected to the positioning pin 502. The positioning pin 502 is fixed on the fixed ball 501. One end of the two tension springs 503 is respectively connected to the first adjustment handle 55 and the third adjustment handle 57;

[0053] A pointer clamping head 511 is fixed on the pointer seat 54, and a pointer 70 is fixed on the pointer clamping head 511;

[0054] A slide block 53 is slidably disposed in the middle of the base 51, a compression spring 533 is disposed in the slide block 53, the compression spring 533 is engaged in the base 51, one end of the compression spring 533 is fixedly connected to the base 51, and the other end of the compression spring 533 is connected to the second adjustment handle 56, and a limiting hole 532 connected to the second free guide arm 40 is opened on the slide block 53;

[0055] A fixing block 52 is fixed on the base 51 to limit the sliding rail block 53 from moving back and forth in a single direction.

[0056] The fine adjustment mechanism 50 of this structure can make the pointer 70 move in three directions of X, Y and Z. The pointer 70 can be adjusted in a small range, and the adjustment of the pointer 70 is more accurate, and the focus indication effect is better. The rotation of the first adjustment handle 55 and the third adjustment handle 57 can make the pointer seat 54 rotate around the fixed ball 501 between the base 51 and the pointer seat 54, so as to adjust the pointer 70 from two directions.

[0057] The second adjustment handle 56 can be rotated to adjust the position of the slide block 53 relative to the base 51, so that the pointer 70 can be adjusted in the third direction, that is, the position of the pointer 70 can be adjusted in all directions, and the pointer 70 can be accurately adjusted to achieve better use effect.

[0058] like Figure 7As shown, V-shaped grooves 531 are provided on the contact surfaces of the base 51, the slide block 53 and the fixed block 52, and balls 59 are slidably arranged in the V-shaped grooves 531. Retaining frames 58 are provided between the base 51 and the slide block 53 and between the slide block 53 and the fixed block 52, and the retaining frames 58 engage the balls 59. Through this structural setting, the movement of the slide block 53 relative to the base 51 can be made smoother, and the adjustment effect of the pointer 70 can be better.

[0059] During use, the user, according to actual conditions, uses the two groups of first free guide arms 20 on the fixing part 30 to place the focus calibration device as a whole on the laser scanning lens group 10. When adjusting the pointer 70, the user can rotate the first free guide arm 20 and the second free guide arm 40, so that the position of the fine adjustment mechanism 50 connected to the bottom of the second free guide arm 40 is adjusted, and the pointer 70 is roughly adjusted over a large range. Then, the fine adjustment mechanism 50 is used to adjust the pointer 70 in a small range, thereby accurately indicating the laser focus position.

[0060] The technical scope of the present invention is not limited to the contents in the above description. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of ​​the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. A laser lens focus calibration device for laser welding, characterized in that: It comprises a laser scanning mirror group (10) and a fine adjustment mechanism (50), wherein the laser scanning mirror group (10) is provided with a magnetically attracted coarse adjustment mechanism; The coarse adjustment mechanism comprises a first free guide arm (20), a fixing member (30), and a second free guide arm (40); the first free guide arms (20) are symmetrically fixed on both sides of the fixing member (30); and the second free guide arm (40) is fixed at the center of the bottom of the fixing member (30); A fine adjustment mechanism (50) is provided at the bottom of the second free guide arm (40), a pointer (70) is provided on the fine adjustment mechanism (50), the coarse adjustment mechanism adjusts the position of the pointer (70) in a large range, and the fine adjustment mechanism (50) adjusts the position of the pointer (70) in a small range; The fine adjustment mechanism (50) comprises a base (51), a fixed block (52), a slide block (53) and a pointer seat (54); a fixed ball (501) is provided at one end of the contact surface between the base (51) and the pointer seat (54); positioning pins (502) and tension springs (503) are provided on both sides between the base (51) and the pointer seat (54) away from the fixed ball (501); the tension spring (503) passes through the base (51) and is connected to the positioning pin (502); the positioning pin (502) is fixed on the fixed ball (501); one end of the two tension springs (503) is connected to the first adjustment handle (55) and the third adjustment handle (57) respectively; A pointer clamping head (511) is fixed on the pointer seat (54), and a pointer (70) is fixed on the pointer clamping head (511); A slide block (53) is slidably arranged in the middle of the base (51), a compression spring (533) is arranged in the slide block (53), the compression spring (533) is engaged in the base (51), one end of the compression spring (533) is fixedly connected to the base (51), and the other end of the compression spring (533) is connected to the second adjustment handle (56), and a limiting hole (532) connected to the second free guide arm (40) is opened on the slide block (53); A fixed block (52) is fixed on the base (51) for limiting the sliding rail block (53) from moving back and forth in a single direction.

2. The laser lens focus calibration device for laser welding according to claim 1, characterized in that: A magnetic seat (60) is fixed on the top of the first free guide arm (20), and the magnetic seat (60) is arranged on the laser scanning mirror group (10) by suction to limit the overall position of the coarse adjustment mechanism.

3. The laser lens focus calibration device for laser welding according to claim 2, characterized in that: A groove is provided in the middle of the top of the magnetic seat (60), and the top of the magnetic seat (60) is located on both sides of the groove and is a planar structure.

4. The laser lens focus calibration device for laser welding according to claim 1, characterized in that: The first free guide arm (20) and the second free guide arm (40) have the same structure; The first free guide arm (20) comprises a first rotating pair (21), a first connecting rod (22), a second rotating pair (23), a locking handle (24), a second connecting rod (25) and a third rotating pair (26); a second rotating pair (23) is provided between one end of the first connecting rod (22) and the second connecting rod (25); a locking handle (24) for locking the rotation of the second rotating pair (23) is provided on the second rotating pair (23); a first rotating pair (21) is provided at the other end of the first connecting rod (22); and a third rotating pair (26) is provided at the other end of the second connecting rod (25).

5. The laser lens focus calibration device for laser welding according to claim 4, characterized in that: The first rotating pair (21) and the third rotating pair (26) have the same structure; The first rotation pair (21) comprises a spherical groove tube and a ball rod, wherein the spherical groove tube is fixed on the first connecting rod (22), the spherical end of the ball rod is connected to the spherical groove tube, and the ball rod is located in the spherical groove tube and rotates freely.

6. The laser lens focus calibration device for laser welding according to claim 4, characterized in that: The second rotating pair (23) comprises a connecting shaft (231), a fixing ring (232) is fixed at the middle part of the connecting shaft (231), a first connecting sleeve (234) is rotatably connected to one side of the fixing ring (232) on the connecting shaft (231), a limiting plate (233) is provided at the end of the fixing ring (232) in the first connecting sleeve (234), the limiting plate (233) limits the first connecting sleeve (234) from separating from the connecting shaft (231), a second connecting sleeve (235) is fixed to the other side of the fixing ring (232) on the connecting shaft (231), the first connecting sleeve (234) is fixedly connected to the first connecting rod (22), and the second connecting sleeve (235) is fixedly connected to the second connecting rod (25).

7. The laser lens focus calibration device for laser welding according to claim 1, characterized in that: The fixing member (30) comprises a fixing seat (31), a connecting hole (32) and a connecting groove (33); the fixing seat (31) is bolted to the first free guide arm (20) at both sides; the fixing seat (31) is bolted to the second free guide arm (40) at the bottom center; the fixing seat (31) is symmetrically provided with connecting holes (32) at both sides; and the fixing seat (31) is provided with connecting grooves (33) communicating with the connecting holes (32) at both ends.

8. The laser lens focus calibration device for laser welding according to claim 1, characterized in that: The contact surfaces of the base (51), the slide block (53) and the fixed block (52) are all provided with V-shaped slide grooves (531), in which balls (59) are slidably arranged, and retaining frames (58) are provided between the base (51) and the slide block (53) and between the slide block (53) and the fixed block (52), and the retaining frames (58) engage the balls (59).

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