Laser stitch welding multi-layer metal plate self-adaptive adjusting mechanism and laser welding equipment

Abstract

The invention discloses a laser stitch welding multi-layer metal plate self-adaptive adjusting mechanism and laser welding equipment. The adjusting mechanism comprises two hub seats, a driving wheel, a follower wheel, a guide rod, a pressing plate, a spring, a driving seat plate, a positioning wheel, a driving part, a distance measuring detection plate and a distance measuring sensor. The driving wheel makes contact with the driven wheel through bounce of the spring, a workpiece is placed between the two wheels, the driving piece drives the whole mechanism to walk along the workpiece, and the positioning wheel moves along the top of the workpiece through the gravity of the mechanism. When the thickness of the workpiece changes, the movable hub seat slides along the guide rod, the distance measuring sensor sends measured distance data to the processor in real time, and welding parameters of the laser welding head are controlled. According to the utility model, the problems of weld penetration, arc breaking, non-uniform closed curve weld joints, unstable welding positions and the like can be solved under the complex working condition that the walking platform surface is uneven; and meanwhile, the method is suitable for laser stitch welding with variable thickness, and stitch welding under many complex working conditions can be met.

Description

Technical Field

[0001] This patent belongs to the technical field of laser welding, and specifically relates to an adaptive adjustment mechanism for laser lap welding of multi-layer metal sheets and laser welding equipment. Background Art

[0002] The welding technology of laser welding machines is becoming more and more popular in the processing industry. It is mainly used for welding thin-walled materials and precision parts. It can realize spot welding, butt welding, lap welding, sealing welding, tailoring welding, penetration welding, filler welding, seam welding and airtight seam welding, and can adapt to a variety of welding trajectories.

[0003] Laser welding uses a high-energy laser beam to overlap two or more layers of stainless steel sheets, and melts their surfaces and joints under the action of the laser beam to form a molten pool, thereby achieving metallurgical connection of the metals.

[0004] like Figure 1 As shown, there is currently a metal sheet 001 with vertical edges, which needs to be welded. During the welding process, in order to enhance the overall stability of the metal sheet 001 and facilitate subsequent installation, it is necessary to place clamping plates at a certain interval between the metal sheets 001 before welding the entire sheet.

[0005] However, conventional laser stitch welding equipment has certain limitations. This type of equipment can usually only weld materials of fixed thickness, and its welding conditions are relatively harsh, requiring the welding surface to be flat or the height difference between the upper and lower positions to be at a low level. It belongs to the conventional welding mode and is not applicable to complex welding environments such as uneven ground. Therefore, the existing laser stitch welding equipment cannot meet the stitch welding needs of this type of metal sheet 001 with vertical edges.

[0006] In view of this, we propose an adaptive adjustment mechanism for laser stitch welding of multi-layer metal sheets and a laser welding device. Summary of the invention

[0007] In order to solve the problems existing in the prior art, this patent provides an adaptive adjustment mechanism for laser lap welding of multi-layer metal sheets and a laser welding device.

[0008] First, in order to achieve the above purpose, this patent adopts the following technical solutions: A self-adaptive adjustment mechanism for laser stitch welding of multi-layer metal sheets, comprising: A fixed wheel hub seat, on which a driving shaft is rotatably arranged, and a driving wheel is arranged at the bottom of the driving shaft; A driven wheel hub seat, on which a driven shaft is rotatably arranged, and a follower wheel is arranged at the bottom of the driven shaft; Guide rods, a plurality of said guide rods are arranged in parallel on the fixed wheel hub seat, said guide rods pass through the movable wheel hub seat, and said movable wheel hub seat can slide along the axial direction of the guide rods; A pressure plate, which is arranged at the end of the guide rod; A spring, wherein the spring is sleeved on the guide rod, and the two ends of the spring are respectively in contact with the pressure plate and the driven wheel hub seat, and the rebound force of the spring makes the driving wheel and the driven wheel contact and clamp the workpiece; A driving seat plate, which is arranged directly above the two wheel hub seats, is fixed to the fixed wheel hub seat, is used for installing the laser welding head on the laser welding equipment, and can slide up and down along the laser welding equipment; Positioning wheels, which are arranged at both ends of the driving seat plate and are used to roll on the top of the workpiece; A driving member, the driving member is arranged on the driving seat plate, and the driving member is used to drive the driving shaft to rotate, so as to drive the driving wheel to move on the workpiece; A distance measuring detection plate, wherein the distance measuring detection plate is arranged on the moving wheel hub seat; And, a distance measuring sensor, which is arranged on the driving base plate and corresponds to the distance measuring detection board. The distance measuring sensor sends the measured data to the processor in real time to control the welding parameters of the laser welding head of the laser welding equipment.

[0009] Furthermore, it also includes a tightening bolt, the guide rod passes through the pressure plate, the pressure plate can slide along the axial direction of the guide rod, the tightening bolt passes through the pressure plate and the moving wheel hub seat, and is threadedly connected to the fixed wheel hub seat.

[0010] Furthermore, a baffle is provided at the end of the guide rod.

[0011] Furthermore, a floating guide rod is provided at the bottom of the driving seat plate, and the floating guide rod is slidably matched with the frame of the laser welding equipment along the up and down directions.

[0012] Furthermore, the positioning wheel is arranged on the driving base plate in an adjustable height.

[0013] Furthermore, a vertical positioning seat plate is provided on the positioning wheel, and two vertical strip holes 1 are provided on the positioning seat plate, and bolts pass through the strip holes 1 and are threadedly connected with the driving seat plate.

[0014] Furthermore, a scale ruler is provided on the positioning seat plate.

[0015] Furthermore, the driving seat plate is provided with two mounting holes matched with the width of the positioning seat plate, and the scale 1 is mounted on the front side of the positioning seat plate.

[0016] Furthermore, a compression spring is arranged between the moving wheel hub seat and the fixed wheel hub seat, and a hole for installing the compression spring is opened on the moving wheel hub seat and / or the fixed wheel hub seat.

[0017] Furthermore, the driving component includes a servo motor, a reducer, a driving gear and a driven gear, the reducer is integrally connected to the servo motor, the reducer is fixed to the top of the driving base plate, the driving gear is fixed on the reducer, the driven gear is fixed to the top of the driving shaft, and the driven gear is meshed with the driving gear.

[0018] Furthermore, the guide rod is a cylindrical rod, there are two guide rods, and the guide rods are symmetrically distributed on the fixed hub seat.

[0019] Furthermore, two driving wheels are installed on the fixed wheel hub seat, and two driven wheels corresponding to the driving wheels are installed on the moving wheel hub seat.

[0020] Furthermore, the driving seat plate is provided with an avoidance opening for avoiding the distance measuring detection plate, the distance measuring detection plate extends out from the avoidance opening, and the distance measuring sensor is arranged on the top surface of the driving seat plate.

[0021] On the second hand, in order to achieve the above-mentioned purpose, this patent adopts the following technical solutions: A laser welding device, comprising: frame; A roller, wherein the roller is mounted at the bottom of the frame; Laser welding head; And, in any of the above-mentioned adaptive adjustment mechanisms for laser stitch welding of multi-layer metal sheets, the laser welding head is fixed on a driving seat plate, and the driving seat plate can slide up and down along the frame.

[0022] Furthermore, the roller is arranged on the frame in an adjustable height.

[0023] Furthermore, a corner plate is fixed on the top of the roller, and a second strip hole is opened on the vertical plate of the corner plate, and a bolt passes through the second strip hole to be fixedly connected to the frame.

[0024] Furthermore, an adjusting screw is threadedly connected to the frame, and the head of the adjusting screw is used to contact the flat plate of the angle plate.

[0025] Furthermore, a second scale is provided on the side surface of the vertical plate of the angle plate, and an indicator line corresponding to the second scale is provided on the frame.

[0026] Compared with the prior art, this patent has the following beneficial effects: In this patent, the workpiece is placed between two wheels, and the driving part drives the active wheel to move along the workpiece. When the thickness of the workpiece changes, the ranging sensor can detect the thickness change of the workpiece to be welded, so as to adjust the welding process in real time to meet the continuous laser welding of various thickness changes of automatic welding.

[0027] At the same time, under the action of the gravity of the entire mechanism, the positioning wheel is placed on the top of the workpiece to be welded and moves along it, effectively avoiding problems such as welding penetration, arc breaking, uneven closed curve welds, unstable welding position, etc. caused by uneven platform, and ensuring the stability of welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural diagram of the existing working conditions.

[0029] Figure 2 It is a structural diagram of embodiment 1 of this patent.

[0030] Figure 3 It is a schematic diagram showing the overall structure of the hub seat in Example 1 of this patent.

[0031] Figure 4 It is a schematic diagram of the fixed hub seat and the structure thereon in Example 1 of this patent.

[0032] Figure 5 This is a schematic diagram of the moving wheel hub seat and the structure thereon in Example 1 of this patent.

[0033] Figure 6 This is a schematic diagram of the structure of the driving component in Example 1 of this patent.

[0034] Figure 7 yes Figure 2 Enlarged schematic diagram of part A in the middle.

[0035] Figure 8 It is a structural diagram of embodiment 2 of this patent.

[0036] Fig. 9 yes Figure 8 Enlarged schematic diagram of part B in the middle.

[0037] Reference numerals in the figures: 001, sheet metal; 1, fixed hub seat; 2, moving hub seat; 3, driving shaft; 4, driving wheel; 5, driven shaft; 6, driven wheel; 7, guide rod; 8, pressure plate; 9, spring; 10, driving seat plate; 101, mounting hole; 102, avoidance; 11, positioning wheel; 12, driving part; 121, servo motor; 122, reducer; 123, driving gear; 124, driven gear; 13, distance detection plate; 14, distance sensor; 15, tension bolt; 16, baffle; 17, floating guide rod; 18, positioning seat plate; 181, strip hole one; 19, scale one; 20, compression spring; 100, frame; 200, roller; 300, laser welding head; 400, angle plate; 500, adjusting screw; 600, scale two. DETAILED DESCRIPTION

[0038] The following will combine the drawings in the embodiments of this patent to clearly and completely describe the technical solutions in the embodiments of this patent. Obviously, the described embodiments are only part of the embodiments of this patent, not all of the embodiments. Example 1

[0039] like Figures 2 to 7 As shown, the present application provides an adaptive adjustment mechanism for laser stitch welding of multi-layer metal sheets, which includes a fixed hub seat 1, a movable hub seat 2, a driving wheel 4, a follower wheel 6, a guide rod 7, a pressure plate 8, a spring 9, a driving seat plate 10, a positioning wheel 11, a driving member 12, a distance measurement detection plate 13 and a distance measurement sensor 14.

[0040] Specifically, the fixed wheel hub seat 1 and the moving wheel hub seat 2 are arranged opposite to each other on the same horizontal plane, and both are rectangular parallelepiped structures. A driving shaft 3 is rotatably mounted on the fixed wheel hub seat 1 through a bearing, and a driving wheel 4 is fixed to the bottom of the driving shaft 3 through a key. A driven shaft 5 is rotatably mounted on the moving wheel hub seat 2 through a bearing, and a driven wheel 6 is fixed to the bottom of the driven shaft 5 through a key.

[0041] In the above, the driving wheel 4 and the driven wheel 6 are set in the same size. Now, the structure of the driving wheel 4 is taken as an example to be described in detail. The driving wheel 4 is a rotating body structure, which includes a disc and a sleeve located on the top of the disc, and the top surface of the disc is formed with a chamfered structure.

[0042] In this embodiment, the number of the driving wheel 4 and the driven wheel 6 is equal, and can be one, two, three, etc., which are respectively installed on the fixed wheel hub seat 1 and the moving wheel hub seat 2, and the driving wheel 4 and the driven wheel 6 are arranged opposite to each other to form a plurality of pairs of pressure wheel structures. Preferably, the number of the driving wheel 4 and the driven wheel 6 are both two, which are respectively installed on the fixed wheel hub seat 1 and the moving wheel hub seat 2, and the driving wheel 4 and the driven wheel 6 are arranged opposite to each other to form two pairs of pressure wheel structures.

[0043] In this embodiment, refer to Figure 3and Figure 4 The number of guide rods 7 is several, and the guide rods 7 are fixed on the fixed wheel hub seat 1, and the guide rods 7 pass through the moving wheel hub seat 2 and slide with it. Preferably, the guide rods 7 are two cylindrical rod structures, and the two guide rods 7 are fixed on both sides of the fixed wheel hub seat 1 facing the end of the moving wheel hub seat 2, and the two guide rods 7 are arranged in parallel and symmetrically distributed with respect to the fixed wheel hub seat 1. The moving wheel hub seat 2 is provided with a through hole adapted to the guide rod 7, and the moving wheel hub seat 7 is sleeved on the guide rod 7 and slides along the axial direction of the guide rod 7.

[0044] This embodiment specifically discloses a connection structure between the guide rod 7 and the fixed wheel hub seat 1. A mounting seat is fixed to the end of the guide rod 7, and the mounting seat is fixedly connected to the fixed wheel hub seat 1 by bolts. In addition, a mounting groove is provided on the side of the positioning wheel hub 1, and the mounting seat at the end of the guide rod 7 is fixed in the mounting groove. Such a setting can effectively prevent the mounting seat on the guide rod 7 from interfering with the movement of the moving wheel hub seat 2.

[0045] Reference Figure 3 and Figure 5 The pressure plate 8 is arranged at the end of the guide rod 7 away from the fixed wheel hub seat 1, the spring 9 is sleeved on the guide rod 7, and the spring 9 is located between the moving wheel hub seat 2 and the pressure plate 8, and the two ends of the spring 9 are respectively in contact with the moving wheel hub seat 2 and the pressure plate 8. The rebound force of the spring 9 makes the driving wheel 4 and the driven wheel 6 in contact with each other. When the workpiece to be welded is placed between the two wheels, the workpiece to be welded is in a clamped state.

[0046] In this embodiment, the pressing plate 8 can be fixedly connected to the guide rod 7, and of course, the baffle 16 can also be fixedly connected to the end of the guide rod 7 to limit the pressing plate 8 and prevent the pressing plate 8 from being separated from the fixed rod 7. In actual use, the latter solution is preferred, and the baffle 16 is fixed at the end of the guide rod 7 to limit the pressing plate 8.

[0047] The above scheme can be further improved by providing a tension bolt 15 in the middle of the pressure plate 8, the tension bolt 15 passes through the pressure plate 8 and the moving wheel hub seat 2 in sequence, and the tension bolt 15 is threadedly connected with the fixed wheel hub seat 1. With such a configuration, when the mechanism is installed, the spring can be initially in an uncompressed state for easy installation; at the same time, the preload force of the spring 9 is adjusted by the tension bolt 15, thereby controlling the range and strength of the wheelbase adjustment.

[0048] In a possible embodiment, grooves are provided on both sides of the end of the moving hub seat 2 away from the fixed hub seat 1, and the ends of the spring 9 are located in the grooves. In order to enable the staff to distinguish the two hub seats at the first time during the installation process, a groove is provided at the end of the fixed hub seat 1 away from the moving hub seat 2. Specifically, the groove is located in the middle of the side of the fixed hub seat 1 away from the moving hub seat 2, and is in the shape of an isosceles trapezoid with a larger outer side and a smaller inner side.

[0049] In a possible embodiment, a compression spring 20 is provided between the fixed wheel hub seat 1 and the moving wheel hub seat 2. After the wheel hub is opened, the compression spring 20 maintains a spacing between the driving wheel 4 and the driven wheel 6, which facilitates clamping of the workpiece. Specifically, a hole for installing the compression spring 20 is provided on the fixed wheel hub seat 1 and / or the moving wheel hub seat 2; further, a hole for installing the compression spring 20 is provided on both the fixed wheel hub seat 1 and the moving wheel hub seat 2. At the same time, the tension bolt 15 and the compression spring 20 are located in the middle area of ​​the fixed wheel hub seat 1 and the moving wheel hub seat 2.

[0050] Reference Figure 2 The driving seat plate 10 is a rectangular plate structure. The length direction of the driving seat plate 10 is along the welding direction of the workpiece to be welded. The driving seat plate 10 is fixedly connected to the fixed hub seat 1 by bolts, and a certain distance is set between the two.

[0051] The driving seat plate 10 slides with the laser welding equipment along its height direction, and positioning wheels 11 are fixed at both ends of the driving seat plate 10 in the length direction. When the laser welding equipment welds the workpiece, the entire laser welding multi-plate overlap welding adjustment mechanism slides on the laser welding equipment due to its own gravity, so that the positioning wheel 11 is pressed on the upper edge of the upright lock edge of the workpiece and rolls on it.

[0052] In this embodiment, the entire mechanism can slide in the height direction of the laser welding equipment, so that the positioning wheel 11 always maintains contact with the vertical edge of the workpiece, and thus the entire mechanism can be suitable for complex welding on uneven ground, avoiding inappropriate welding parameters caused by uneven welding platform, and further ensuring the stability of welding quality.

[0053] Reference Figure 2 and Figure 7 In addition, in a possible embodiment, the height of the positioning wheel 11 can be adjusted. Specifically, a vertical positioning seat plate 18 is installed on the positioning wheel 11, and the positioning wheel 11 is rotatably installed at the bottom of the positioning seat plate 18, that is, a groove is opened at the bottom of the positioning seat plate 18, and the positioning wheel 11 is rotatably installed in the groove of the positioning seat plate 18 through a rotating shaft; the positioning seat plate 18 is opened with two vertical strip holes 181, and the bolts pass through the strip holes 181 and are threadedly matched with the driving seat plate 10.

[0054] In order to accurately adjust the distance between the positioning wheel 11 and the driving base plate 10 , a scale 19 is fixed on the positioning base plate 18 , and the distance between the positioning wheel 11 and the driving base plate 10 is determined by the scale 19 .

[0055] Furthermore, two mounting holes 101 compatible with the positioning base plate 18 are opened on the driving base plate 10, and the scale 19 is fixed on the front side of the positioning base plate 18 and is located on one side of the positioning base plate 18. This arrangement makes it convenient for the upper edge of the mounting hole 101 to be opposite to the scale 19 for reading the value on the scale 19.

[0056] Reference Figure 2 , vertically arranged floating guide rods 17 are fixed at the four corners of the bottom surface of the driving seat plate 10, and the floating guide rods 17 are used to pass through the frame of the laser welding equipment and slide with it. In addition, the driving seat plate 10 and the frame of the laser welding equipment can also slide with each other by means of the linear rail slider.

[0057] Reference Figure 2 and Figure 6 In this embodiment, the driving member 12 is fixed on the driving base plate 10, and the driving member 12 is used to drive the driving shaft 3 to rotate, thereby driving the driving wheel 4 to rotate.

[0058] Specifically, the driving member 12 includes a servo motor 121, a reducer 122, a driving gear 123 and a driven gear 124, wherein the servo motor 121 and the reducer 122 are integrally arranged, the reducer 122 is fixed to the top surface of the driving base plate 10 by bolts, the driving shaft of the reducer 121 passes through the driving base plate 10 and is fixedly connected to the driving gear 123, the number of the driven gears 124 is two, the two driven gears 124 are respectively fixed on the top of the two driving shafts 3, the driving gear 123 is meshed with the two driven gears 124, the servo motor 121 runs, drives the driving gear 123 to rotate, and then drives the two driven gears 124 to rotate synchronously, so that the two driving wheels 4 rotate synchronously, so as to stably walk on the workpiece.

[0059] In addition, in this embodiment, the driving member 12 may also be a pulley structure or a sprocket structure driven by a motor, which synchronously drives the two driving wheels 4 to rotate and move on the workpiece, which will not be elaborated in detail here.

[0060] In this embodiment, the driving seat plate 20 provides an installation position for the laser welding head, which is installed on a portion of the driving seat plate 20 with the fixed hub seat 1, and the laser welding head is located between the two driving wheels 4. Ensure that the distance between the laser welding head and the workpiece remains constant.

[0061] Reference Figure 2In this embodiment, the distance detection plate 13 is fixed on the moving wheel hub seat 2, and the distance sensor 14 is fixed on the fixed wheel hub seat 1 or the driving seat plate 10, and is arranged opposite to the distance detection plate 13. Further, the distance sensor 14 is fixed on the top surface of the driving seat plate 10, and the driving seat plate 10 is provided with an avoidance opening 102, and the top of the distance detection plate 14 extends out from the avoidance opening 102, and the distance detection plate 13 cooperates with the distance sensor 14.

[0062] The laser welding head installed on the driving seat plate 10 is located behind the distance measuring detection plate 13 and the distance measuring sensor 14. The distance measuring sensor 14 can detect the thickness change of the workpiece to be welded. The distance measuring sensor 14 transmits the measured real-time data to the processor. The processor controls the laser welding head to adjust the welding process in real time to meet the continuous laser welding of automatic welding with various thickness changes.

[0063] During operation, the tension bolt 15 can press the spring 9 through the pressure plate 8, so that the driven wheel 6 and the driving wheel 4 are close together. When there is a workpiece to be welded in the middle, the workpiece to be welded can be pressed tightly; the servo motor 121 runs, and the driving gear 123 at its driving end drives the driven gear 124 to rotate, thereby rotating the driving wheel 4. The rotation of the driving wheel 4 drives the entire mechanism to move through the friction force with the workpiece, and the driven wheel 6 rotates accordingly. When the thickness of the workpiece changes, the moving wheel hub seat 2 will move relative to the fixed wheel hub seat 1 along the guide rod 7. At this time, the compression amount of the spring 9 changes, and the floating adjustment of the wheelbase is achieved through its elastic action.

[0064] At the same time, since the driving seat plate 10 slides along the laser welding equipment through the floating guide rod 17, even if the driving laser welding equipment moves on an uneven ground, the positioning wheel 11 of the adaptive adjustment mechanism is always in contact with the upper edge of the upright lock edge of the workpiece and moves along it.

[0065] This application can meet the needs of continuous laser welding with various thickness changes for automatic welding, and also effectively avoids problems such as welding penetration, arc breaking, uneven closed curve welds, unstable welding position, etc. caused by uneven platforms, thereby ensuring the stability of welding.

[0066] The adaptive adjustment mechanism of the present application has the following advantages: Simple structure: The mechanism consists of several main parts and is easy to manufacture and install.

[0067] Adjustable wheelbase: Through the elastic effect of the spring 9, the floating adjustment of the wheelbase is achieved, thereby improving the adaptability of the equipment.

[0068] Good stability: the two guide rods 7 are symmetrically distributed, which ensures the stability of the movement of the moving hub seat 2.

[0069] Spring protection: The spring 9 is sleeved on the guide rod 7, which avoids the twisting and deformation of the spring 9 during the compression process and prolongs the service life of the spring 9.

[0070] Of course, the adjustment mechanism can also be applied to various mechanical equipment that need to adjust the wheelbase, such as industrial vehicles, agricultural machinery, etc. In different working environments, the passability, stability and operating performance of the equipment can be improved by adjusting the wheelbase.

[0071] In addition, two guide rods 7 can be symmetrically fixed on one side of the moving hub seat 2, the guide rods 7 pass through the fixed hub seat 1 and the pressure plate 8, the spring 9 is sleeved on the guide rods 7, the tightening screws 15 pass through the pressure plate 8 and the fixed hub seat 1, and are threadedly connected to the moving hub seat 2. Example 2

[0072] like Figure 8 and Fig. 9 As shown, based on the same patent concept, the present application also discloses a laser welding device, which includes a frame 100, a roller 200, a laser welding head 300 and the above-mentioned laser lap welding multi-layer metal sheet adaptive adjustment mechanism. Specifically, the frame 100 is spliced ​​by metal rods and plates, and the frame 100 is in the shape of a rectangular parallelepiped as a whole. The roller 200 is fixed at the four corners of the bottom of the frame 100, and the laser welding head 300 is fixed on the driving seat plate 10 of the laser welding multi-plate lap welding adjustment mechanism, and the laser welding head 300 is located between the two driving wheels 4. Four sleeves adapted to the floating guide rod 16 are fixed on the frame 100.

[0073] In this embodiment, the distance between the roller 200 and the frame 100 can be adjusted. Specifically, an angle plate 400 is fixed on the roller 200, and two vertically arranged strip holes 2 (not shown in the figure) are provided on the vertical plate of the angle plate 400. Bolts pass through the strip holes 2 and are threadedly connected to the frame 100, so as to fix the angle plate 400 on the frame 100.

[0074] Furthermore, in order to facilitate the stability of the roller 200 on the frame 100, a vertically arranged adjusting bolt 500 is threadedly connected to the frame 100, and the head of the adjusting bolt 500 is used to contact the flat plate of the angle plate 400. The adjusting bolt 500 is mainly used to support the angle plate 400 to effectively prevent the angle plate 400 from being deformed; at the same time, the adjusting bolt 500 can be used to adjust the position of the angle plate 400 on the frame 100.

[0075] In a possible embodiment, in order to adjust the spacing between the four rollers 200 and the frame 100 to be equal, a second scale 600 is fixed on the side of the angle plate 400, and an indicator line opposite to the second scale 600 is formed on the side of the frame 100, thereby facilitating reading the distance between the rollers 200 and the frame 100.

[0076] The above is only a preferred specific implementation method of this patent, but the protection scope of this patent is not limited to this. Any technician familiar with this technical field can make equivalent substitutions or changes within the technical scope disclosed by this patent according to the technical solution and patent concept of this patent, which should be covered by the protection scope of this patent.

Claims

1. An adaptive adjustment mechanism for laser stitch welding of multi-layer metal sheets, characterized in that: include: A fixed wheel hub seat (1), a driving shaft (3) being rotatably arranged on the fixed wheel hub seat (1), and a driving wheel (4) being arranged at the bottom of the driving shaft (3); A driven wheel hub seat (2), a driven shaft (5) being rotatably arranged on the driven wheel hub seat (2), and a follower wheel (6) being arranged at the bottom of the driven shaft (5); Guide rods (7), a plurality of guide rods (7) are arranged in parallel on the fixed wheel hub seat (1), the guide rods (7) pass through the movable wheel hub seat (2), and the movable wheel hub seat (2) can slide along the axial direction of the guide rods (7); A pressure plate (8), wherein the pressure plate (8) is arranged at the end of the guide rod (7); A spring (9), wherein the spring (9) is sleeved on the guide rod (7), and the two ends of the spring (9) are respectively in contact with the pressure plate (8) and the driven wheel hub seat (2), and the rebound force of the spring (9) causes the driving wheel (4) to contact with the driven wheel (6), and clamps the workpiece; A driving seat plate (10), wherein the driving seat plate (10) is arranged directly above the two wheel hub seats, the driving seat plate (10) is fixed to the fixed wheel hub seat (1), the driving seat plate (10) is used for installing a laser welding head (300) on a laser welding device, and the driving seat plate (10) can slide up and down along the laser welding device; Positioning wheels (11), the positioning wheels (11) are arranged at both ends of the driving base plate (10), and the positioning wheels (11) are used to roll on the top of the workpiece; A driving member (12), wherein the driving member (12) is arranged on the driving base plate (10), and the driving member (12) is used to drive the driving shaft (3) to rotate, thereby driving the driving wheel (4) to move on the workpiece; A distance measuring detection plate (13), wherein the distance measuring detection plate (13) is arranged on the moving wheel hub seat (2); And, a distance sensor (14), wherein the distance sensor (14) is arranged on the driving seat plate (10) and corresponds to the distance detection plate (13), and the distance sensor (14) sends the measured data to the processor in real time to control the welding parameters of the laser welding head (300) on the laser welding equipment.

2. The self-adaptive adjustment mechanism for laser stitch welding of multi-layer metal sheets according to claim 1 is characterized in that: It also includes a tensioning bolt (15), the guide rod (7) passes through the pressure plate (8), the pressure plate (8) can slide along the axial direction of the guide rod (7), the tensioning bolt (15) passes through the pressure plate (8) and the moving wheel hub seat (2), and is threadedly connected to the fixed wheel hub seat (1).

3. The self-adaptive adjustment mechanism for laser stitch welding of multi-layer metal sheets according to claim 2 is characterized in that: A baffle (16) is provided at the end of the guide rod (7).

4. The self-adaptive adjustment mechanism for laser stitch welding of multi-layer metal sheets according to claim 1, characterized in that: A floating guide rod (17) is provided at the bottom of the driving seat plate (10), and the floating guide rod (17) is slidably matched with a frame of the laser welding equipment along the up-down direction.

5. The self-adaptive adjustment mechanism for laser stitch welding of multi-layer metal sheets according to claim 1, characterized in that: The positioning wheel (11) is arranged on the driving seat plate (10) in an adjustable height.

6. The self-adaptive adjustment mechanism for laser stitch welding of multi-layer metal sheets according to claim 5, characterized in that: The positioning wheel (11) is provided with a vertical positioning seat plate (18), and the positioning seat plate (18) is provided with two vertical strip holes (181). Bolts pass through the strip holes (181) and are threadedly connected with the driving seat plate (10).

7. The self-adaptive adjustment mechanism for laser stitch welding of multi-layer metal sheets according to claim 6, characterized in that: The positioning seat plate (18) is provided with a scale ruler (19).

8. The self-adaptive adjustment mechanism for laser stitch welding of multi-layer metal sheets according to claim 7, characterized in that: The driving seat plate (10) is provided with two mounting holes (101) matching the width of the positioning seat plate (18), and the scale 1 (19) is mounted on the front side of the positioning seat plate (10).

9. The self-adaptive adjustment mechanism for laser stitch welding of multi-layer metal sheets according to claim 1, characterized in that: A compression spring (20) is arranged between the moving wheel hub seat (2) and the fixed wheel hub seat (1), and a hole for installing the compression spring (20) is provided on the moving wheel hub seat (2) and / or the fixed wheel hub seat (1).

10. The self-adaptive adjustment mechanism for laser stitch welding of multi-layer metal sheets according to claim 1, characterized in that: The driving member (12) comprises a servo motor (121), a speed reducer (122), a driving gear (123) and a driven gear (124); the speed reducer (122) is integrally connected to the servo motor (121); the speed reducer (122) is fixed on the top of the driving base plate (10); the driving gear (123) is fixed on the speed reducer (122); the driven gear (124) is fixed on the top of the driving shaft (3); and the driven gear (124) is meshed with the driving gear (123).

11. The self-adaptive adjustment mechanism for laser stitch welding of multi-layer metal sheets according to claim 1, characterized in that: The guide rod (7) is a cylindrical rod, the number of the guide rods (7) is two, and the guide rods (7) are symmetrically distributed on the fixed wheel hub seat (1).

12. The self-adaptive adjustment mechanism for laser stitch welding of multi-layer metal sheets according to claim 1, characterized in that: Two driving wheels (4) are mounted on the fixed wheel hub seat (1), and two driven wheels (6) corresponding to the driving wheels (4) are mounted on the driven wheel hub seat (2).

13. The self-adaptive adjustment mechanism for laser stitch welding of multi-layer metal sheets according to claim 1, characterized in that: The driving seat plate (10) is provided with an avoidance opening (102) for avoiding the distance measuring detection plate (13); the distance measuring detection plate (13) extends out from the avoidance opening (102); and the distance measuring sensor (14) is arranged on the top surface of the driving seat plate (10).

14. A laser welding device, characterized in that: include: Rack(100); A roller (200), wherein the roller (200) is installed at the bottom of the frame (100); Laser welding head (300); And, in the adaptive adjustment mechanism for laser stitch welding of multi-layer metal sheets as described in any one of claims 1-10, the laser welding head (300) is fixed on a driving seat plate (10), and the driving seat plate (10) can slide up and down along the frame (100).

15. The laser welding equipment according to claim 14, characterized in that: The roller (200) is arranged on the frame (100) in an adjustable height.

16. The laser welding equipment according to claim 15, characterized in that: A corner plate (400) is fixed on the top of the roller (200), a second strip hole is opened on the vertical plate of the corner plate (400), and a bolt passes through the second strip hole to be fixedly connected to the frame (100).

17. The laser welding equipment according to claim 16, characterized in that: An adjusting screw rod (500) is threadedly connected to the frame (100), and the head of the adjusting screw rod (500) is used to abut against the flat plate of the angle plate (400).

18. A laser welding device according to claim 16 or 17, characterized in that: A second scale (600) is provided on the side surface of the vertical plate of the angle plate (400), and an indication line corresponding to the second scale (600) is provided on the frame (100).

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