A laser welding and fixing device for metal plate hemming

Abstract

The present invention relates to a metal plate hemming laser welding fixing device, comprising a metal plate fixing mechanism and an hemming plate fixing mechanism. The metal plate fixing mechanism comprises a workpiece table, a pressing plate and a pressing plate lifting unit, the two ends of the pressing plate are arranged on the workpiece table through the pressing plate lifting unit, and the metal plate to be welded is pressed between the pressing plate and the workpiece table; the hemming plate fixing mechanism comprises a guide rail, an elastic unit, a first bracket, a second bracket and a bonding unit, the first bracket is installed on the guide rail and can move along the guide rail, the elastic unit is installed on the first bracket, the bonding unit is installed on the elastic unit through the second bracket, and the bonding unit presses the hemming plate against one side of the metal plate under the elastic thrust of the elastic unit; compared with the prior art, the present invention tightly fixes the metal plate and the hemming plate through the metal plate fixing mechanism and the hemming plate fixing mechanism, which can avoid the gap between the two being too large or too small to affect the formation of the weld, and is conducive to improving the quality of the weld formation.

Description

Technical Field

[0001] The invention relates to the technical field of welding equipment, and in particular to a metal plate hemming laser welding and fixing device. Background Art

[0002] In the field of laser welding hemming in the metal processing industry, although laser welding technology is highly favored for its high precision, high efficiency and good welding quality, in actual operation, the relative fixation and fitting between the metal plate and the hemming plate has always been one of the key factors restricting the improvement of welding quality. During the laser welding hemming process, the metal plate and the hemming plate must maintain extremely high position accuracy and stable fitting state to ensure that the laser beam can accurately and evenly act on the welding interface, thereby achieving high-quality welding connection. However, since the metal plate and the hemming plate often have different materials, thicknesses and shapes, and the thermal stress caused by the rapid temperature change during welding, it is difficult for the two to maintain a stable relative position during welding, and displacement or misalignment is prone to occur.

[0003] This displacement phenomenon will not only lead to geometric deviation of the welded joint, affecting the appearance quality of the product, but more importantly, it will also cause welding defects such as lack of fusion, pores, cracks, etc., which will significantly reduce the mechanical properties and durability of the welded joint. These quality problems not only increase the difficulty of subsequent processing and repair, but may also have a serious impact on the overall performance and safety of the product. Summary of the invention

[0004] The purpose of the present invention is to provide a metal plate edging laser welding fixing device in order to overcome the defects of the above-mentioned prior art, effectively solve the relative fixation and fitting problems of the metal plate and the edging plate during the laser welding edging process, and improve the welding quality and production efficiency.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A metal plate hemming laser welding fixing device, comprising a metal plate fixing mechanism and an hemming plate fixing mechanism;

[0007] The metal plate fixing mechanism comprises a workpiece platform, a pressing plate and a pressing plate lifting unit, both ends of the pressing plate are arranged on the workpiece platform through the pressing plate lifting unit, and the metal plate to be welded is pressed between the pressing plate and the workpiece platform;

[0008] The edge plate fixing mechanism includes a guide rail, an elastic unit, a first bracket, a second bracket and a bonding unit, wherein the first bracket is mounted on the guide rail and can move along the guide rail, the elastic unit is connected to the first bracket, and the bonding unit is connected to the elastic unit through the second bracket. The bonding unit presses the edge plate to be welded against one side of the metal plate under the elastic thrust of the elastic unit;

[0009] The metal plate and the pressure plate have a first maximum static friction force, the metal plate and the workpiece table have a second maximum static friction force, the elastic unit has an elastic thrust on the bonding unit, and the combined force of the first maximum static friction force and the second maximum static friction force is greater than or equal to the elastic thrust.

[0010] In one of the embodiments, the bonding unit is in linear contact with the edging plate.

[0011] In one embodiment, the fitting unit is one or more ball bearings, and the side edges of the one or more ball bearings contact the edging plate.

[0012] In one of the embodiments, the edging plate fixing mechanism further includes a positioning unit, the positioning unit includes a clamping assembly, the clamping assembly is fixed on the second bracket, and the clamping direction of the positioning unit is perpendicular to the elastic thrust direction of the elastic unit.

[0013] In one embodiment, the clamping assembly includes a first driving member, a second driving member, a first clamping head and a second clamping head. The first clamping head and the second clamping head are respectively moved toward each other by the first driving member and the second driving member to clamp and fix a pair of side edges of the edging plate.

[0014] In one embodiment, the first clamping head is in rolling contact with the edge binding plate, and the second clamping head is in rolling contact with the edge binding plate.

[0015] In one embodiment, the positioning unit further includes a limiter, the limiter is connected to the workpiece table, the limiter includes a limit plate and a moving mechanism, the moving mechanism drives the limit plate to be in a limit state and an open state; when in the limit state, the limit plate fits the edge plate and presses the edge plate against one side of the metal plate to be welded; when in the open state, the limit plate leaves the edge plate;

[0016] The limiter is located at one side of the guide rail. When the edging plate fixing mechanism moves along the guide rail to the position of the limiter, the limiter can be in an open state for avoidance.

[0017] In one of the embodiments, a sensor is provided on one side of the limiter, and when the sensor detects the second bracket, the corresponding limiter is converted from a limited state to an open state.

[0018] In one of the embodiments, the metal plate fixing mechanism further includes a slide rail, the slide rail is fixed on the workpiece table, and the pressure plate lifting unit is connected to the slide rail so that the pressure plate can move as a whole along the slide rail.

[0019] In one of the embodiments, a plurality of buffer plates are sequentially provided on one side of the pressing plate for fitting the metal plate.

[0020] In one of the embodiments, at least one welding head mounting portion is further provided on the second bracket for fixing and mounting a laser welding head. When the first bracket drives the second bracket to move along the guide rail, the laser welding head welds the metal plate to be welded and the edging plate.

[0021] In one embodiment, the elastic unit includes a main push cylinder and a guide support rod, the cylinder seat and cylinder rod of the main push cylinder are respectively connected to the first bracket and the second bracket, and the guide support rod passes through the first bracket to connect to the second bracket, or passes through the second bracket to connect to the first bracket.

[0022] In one embodiment, at least three guide support rods are arranged around the main thrust cylinder.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The above-mentioned metal plate hemming laser welding fixture is used to fix the metal plate and the hemming plate when the metal plate is welded and hemmed, so that their relative positions remain unchanged to ensure the reliability of welding. The laser welding fixture adopts a metal plate fixing mechanism to fix the position of the metal plate. Generally, the pressing plate is first raised by the pressing plate lifting unit so that there is enough operating space between the workpiece table and the pressing plate. Then the metal plate is placed on the workpiece table, and the pressing plate lifting unit is adjusted to make the pressing plate press against the metal plate to achieve the fixation of the metal plate. Since the pressing plate lifting unit is set, the placement and removal of the metal plate is more convenient, and the tightness of the pressing can also be adjusted by the pressing plate lifting unit. At the same time, the edging plate fixing mechanism is used to fix the position of the edging plate, and the elastic unit presses the edging plate against the side of the metal plate through the bonding unit. Since the bonding unit can move along the guide rail following the first bracket, when the laser welding head moves along the weld, the bonding unit can move with the laser welding head, thereby realizing the pressing and fixing of different welding positions of the edging plate. Therefore, the elastic unit can prevent the gap between the edging plate and the metal plate from being too large or too small to affect the formation of the weld, and the guide rail enables the bonding unit to dynamically press the part of the edging plate being welded, so that the fixing effect is good, which is beneficial to improving the quality of weld formation.

[0025] 2. The laminating unit and the edge plate achieve rolling contact through ball bearings, which is conducive to the close fit between the laminating unit and the edge plate, and at the same time avoids excessive friction between the laminating unit and the edge plate when the laminating unit moves along the guide rail, thereby avoiding the laminating unit interfering with the movement of the second bracket along the guide rail.

[0026] 3. The positioning unit is provided with a first clamping head and a second clamping head to clamp the upper and lower sides of the edging plate, which is used to limit the upper and lower relative positions of the edging plate and the metal plate, and cooperates with the laminating unit to limit the spacing between the edging plate and the metal plate, fully ensuring that the weld between the edging plate and the metal plate meets the requirements of the upper and lower positions and the left and right positions. At the same time, the first driving member and the second driving member are respectively provided to drive the first clamping head and the second clamping head to move relative to each other, which can effectively adjust the distance between the first clamping head and the second clamping head, leaving more operating space for the installation of the edging plate, and can clamp edging plates of different heights, effectively broadening the scope of application of the laser welding fixture.

[0027] 4. The first clamping head and the second clamping head are in rolling contact with the edging plate. When the clamping assembly moves along the guide rail with the second bracket, the first clamping head and the second clamping head can roll on the side of the edging plate, and the friction between the edging plate is small, thereby avoiding affecting the movement of the positioning unit along the guide rail and scratching the edging plate.

[0028] 5. The pressing plate moves closer to or away from the edging plate along the slide rail, which is conducive to the movement of the pressing plate along the width direction of the metal plate. Therefore, the pressing plate can press the metal plate at different width positions, which is convenient for fixing metal plates of different widths or shapes.

[0029] 6. The moving mechanism on the laser welding fixture can drive the limit plate to switch between the limit state and the open state. When the limit plate is in the limit state, the bonding unit, the clamping assembly, and the limit plate successively fix the relative positions of the metal plate and the edging plate along the length direction to ensure that the edging plate remains stationary before the weld between the metal plate and the edging plate is formed; when the limit plate is in the limit state, the weld between the edging plate and the metal plate abutted by the bonding unit has been formed, and the laser welding head and the edging unit move to the fixed position of the limit plate, and the bonding unit replaces the limit plate to support the edging plate, and the edging plate and the metal plate at the position of the limit plate are welded. Therefore, the limit plate can not only fix the relative position of the metal plate and the edging plate, but also cooperate with the edging unit and the clamping assembly to improve the fixing effect of the edging plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a three-dimensional diagram of a laser welding fixing device in one embodiment.

[0031] Figure 2 It is a three-dimensional diagram of a fixing mechanism for an edge plate in one embodiment.

[0032] Figure 3 It is a side view of the edge plate fixing mechanism in one embodiment.

[0033] Figure 4 It is a three-dimensional diagram of a guide rail in one embodiment.

[0034] Figure 5 4 is a three-dimensional diagram of a metal plate fixing mechanism in one embodiment.

[0035] Figure 6 It is a side view of a laser welding fixture in another embodiment.

[0036] Figure 7 FIG. 4 is a side view of a metal plate fixing mechanism in another embodiment.

[0037] Figure 8 It is a front view of the metal plate fixing mechanism in another embodiment.

[0038] Fig. 9 It is a three-dimensional diagram of a limiter in another embodiment.

[0039] Fig.10 It is a side view of a laser welding fixture in another embodiment.

[0040] Figure numerals: 100, laser welding fixture; 10, metal plate fixing mechanism; 11, workpiece platform; 12, pressing plate; 121, buffer plate; 13, pressing plate lifting unit; 131, lifting fixture; 132, lifting cylinder; 133, pressing plate slider; 14, slide rail; 20, edging plate fixing mechanism; 21, guide rail; 211, guide rail support; 212, first guide rail; 213, driving motor; 214, second guide rail; 215, third guide rail; 22, elastic unit; 221, main push cylinder; 222, guide support rod; 23, first bracket; 231, gear; 232, first sliding part; 233, second sliding part; 234, first slider; 235, second slider; 24, second bracket; 2 5. Laminating unit; 251. U-shaped fixing member; 252. Ball bearing; 26. Positioning unit; 261. First driving member; 262. Second driving member; 263. First clamping head; 264. Second clamping head; 30. Laser welding head; 31. Laser controller; 32. Laser generator; 33. Laser fixing member; 34. Z-axis spacing adjustment assembly; 35. Y-axis spacing adjustment assembly; 40. Stopper; 41. Limiting plate; 411. Support part; 412. Laminating part; 42. Moving mechanism; 43. First fine-tuning bolt; 44. Fine-tuning plate; 45. Second fine-tuning bolt; 50. Equipment main frame; 51. First main frame; 52. Second main frame; 53. Support foot; 60. Metal plate; 70. Edge plate. DETAILED DESCRIPTION

[0041] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0042] A metal plate hemming laser welding and fixing device 100 is described in detail below with reference to the accompanying drawings.

[0043] like Figure 1 , Figure 2 and Figure 5 As shown, in one embodiment, a metal plate hemming laser welding and fixing device 100 is provided, comprising a metal plate fixing mechanism 10 and an hemming plate fixing mechanism 20;

[0044] The metal plate fixing mechanism 10 includes a workpiece platform 11, a pressing plate 12 and a pressing plate lifting unit 13. Both ends of the pressing plate 12 are arranged on the workpiece platform 11 through the pressing plate lifting unit 13. The metal plate 60 to be welded is pressed between the pressing plate 12 and the workpiece platform 11.

[0045] The edge plate fixing mechanism 20 includes a guide rail 21, an elastic unit 22, a first bracket 23, a second bracket 24 and a bonding unit 25. The first bracket 23 is connected to and can move along the guide rail 21. The elastic unit 22 is connected to the first bracket 23. The bonding unit 25 is connected to the elastic unit 22 through the second bracket 24. The bonding unit 25 presses the edge plate 70 to be welded against one side of the metal plate 60 under the elastic thrust of the elastic unit 22.

[0046] The metal plate 60 and the pressure plate 12 have a first maximum static friction, the metal plate 60 and the workpiece table 11 have a second maximum static friction, the elastic unit 22 has an elastic thrust on the bonding unit 25, and the combined force of the first maximum static friction and the second maximum static friction is greater than or equal to the elastic thrust.

[0047] The above-mentioned metal plate hemming laser welding fixture 100 is used to fix the metal plate 60 and the hemming plate 70 when the metal plate 60 is welded and hemmed, so that their relative positions remain unchanged, thereby ensuring the reliability of welding. The laser welding fixture 100 uses a metal plate fixing mechanism 10 to fix the position of the metal plate 60. Generally, the pressing plate 12 is first raised by the pressing plate lifting unit 13 so that there is enough operating space between the workpiece platform 11 and the pressing plate 12. Then, the metal plate 60 is placed on the workpiece platform 11, and the pressing plate lifting unit 13 is adjusted so that the pressing plate 12 presses against the metal plate 60 to fix the metal plate 60. Since the pressing plate lifting unit 13 is provided, the placement and removal of the metal plate 60 are more convenient, and the tightness of the pressing can also be adjusted by the pressing plate lifting unit 13. At the same time, the edging plate fixing mechanism 20 is used to fix the position of the edging plate 70, and the elastic unit 22 presses the edging plate 70 against the side of the metal plate 60 through the bonding unit 25. Since the bonding unit 25 can move along the guide rail 21 following the first bracket 23, when the welding head moves along the weld, the bonding unit 25 can move with the welding head, thereby realizing the pressing and fixing of different welding positions of the edging plate 70. Therefore, the elastic unit 22 can prevent the gap between the edging plate 70 and the metal plate 60 from being too large or too small to affect the formation of the weld, and the guide rail 21 enables the bonding unit 25 to dynamically press the part of the edging plate 70 being welded, so that the fixing effect is good, which is beneficial to improving the quality of weld formation.

[0048] Specifically, Figure 4 and Figure 6 As shown, in one embodiment, the guide rail 21 includes a guide rail support 211, a first guide rail 212 and a driving motor 213 provided on the guide rail support 211, the first guide rail 212 is a toothed guide rail, the first bracket 23 is provided with a gear 231 that matches the first guide rail 212, and the output shaft of the driving motor 213 is connected to the gear 231 to drive the gear 231 to move along the first guide rail 212. The first guide rail 212 is the main component for the first bracket 23 to slide along the guide rail 21, providing power for the first bracket 23 to move, making the sliding smoother.

[0049] It can be understood that the first guide rail 212 can also be a screw guide rail. A screw slider is provided on the first bracket 23 to cooperate with the screw guide rail. The drive motor 213 drives the screw to rotate to realize the movement of the bracket.

[0050] Furthermore, if Figure 4 and Figure 6As shown, in one embodiment, the guide rail 21 further includes a second guide rail 214 and a third guide rail 215. The guides of the first guide rail 212, the second guide rail 214 and the third guide rail 215 are parallel. The second guide rail 214 and the third guide rail 215 are respectively arranged on two mutually perpendicular sides of the guide rail support 211, and the first guide rail 212 is arranged between the second guide rail 214 and the third guide rail 215. The first bracket 23 includes a first sliding portion 232 and a second sliding portion 233 that are perpendicular to each other. The first sliding portion 232 is provided with a first slider 234 and a second slider 235. The first slider 234 is slidably matched with the second guide rail 214, and the second slider 235 is slidably matched with the third guide rail 215. The gear 231 is arranged on the first sliding portion 232. The second guide rail 214 and the third guide rail 215 are used to assist the first guide rail 212, so that the sliding of the first bracket 23 along the guide rail 21 is more stable and reliable.

[0051] The second guide rail 214 and the third guide rail 215 are both I-shaped guide rails, and the first slider 234 and the second slider 235 are groove-shaped sliders that match them.

[0052] Specifically, Figure 2 and Figure 3 As shown, in one embodiment, the laminating unit 25 is in rolling contact and line contact with the edge plate 70 .

[0053] In this specific embodiment, the laminating unit 25 can be a semi-cylindrical abutment member, which abuts against the edge plate 70 through the tangent of the cylinder. Optionally, the laminating unit 25 can also be a row of cylindrical rollers, each of which abuts against the edge plate 70 through its generatrix.

[0054] Furthermore, if Figure 2 and Figure 3 As shown, in one embodiment, the laminating unit 25 is one or more ball bearings 252, and the side edges of the one or more ball bearings 252 contact the edge plate 70. The multiple ball bearings 252 are arranged in sequence along the weld direction of the edge plate 70. The laminating unit 25 and the edge plate 70 are in rolling contact through the ball bearings 252, which is conducive to the close fit between the laminating unit 25 and the edge plate 70, and at the same time, when the laminating unit 25 moves along the guide rail 21, the friction between the laminating unit 25 and the edge plate 70 is prevented from being too large, and the laminating unit 25 is prevented from interfering with the movement of the second bracket 24 along the guide rail 21.

[0055] Among them, the bonding unit 25 is provided with a ball bearing. At this time, the bonding unit 25 occupies the smallest space, has good reliability, and better bonding performance.

[0056] Optionally, the laminating unit 25 may also be one or more rubber rollers, the circumferential surface of the rubber rollers abuts against the edging plate 70, and the plurality of rubber rollers are arranged in sequence along the weld direction of the edging plate 70. The circumferential surface of the rubber rollers is provided with rubber, and the contact between the rubber and the edging plate 70 can prevent the laminating unit 25 from scratching and damaging the edging plate 70.

[0057] In this specific embodiment, the bonding unit 25 includes a U-shaped fixing member 251, a rotating shaft and a ball bearing 252. The U-shaped fixing member 251 is connected to the second bracket 24 and its opening faces the workpiece table 11. The two ends of the rotating shaft are fixed on the two side walls of the U-shaped fixing member 251, and the central axis of the rotating shaft is arranged in the vertical direction. The ball bearing 252 is rotatably sleeved on the rotating shaft.

[0058] Specifically, Figure 2 , Figure 3 and Figure 6 As shown, in one embodiment, the edging plate fixing mechanism 20 further includes a positioning unit 26 , which includes a clamping assembly fixed to the second bracket 24 , and a clamping direction of the positioning unit 26 is perpendicular to the elastic thrust direction of the elastic unit 22 .

[0059] Furthermore, if Figure 2 As shown, in one embodiment, the clamping assembly includes a first driving member 261, a second driving member 262, a first clamping head 263 and a second clamping head 264. The first clamping head 263 and the second clamping head 264 move toward each other through the first driving member 261 and the second driving member 262 respectively, thereby clamping and fixing a pair of side edges of the edging plate 70.

[0060] Among them, the first driving member 261 and the second driving member 262 are both cylinder driving members, and the first driving member 261 and the second driving member 262 are respectively connected to the two side walls of the U-shaped fixing member 251, and the first driving member 261 is connected to the first clamping head 263, and is used to drive the first clamping head 263 to move in the direction close to the second clamping head 264, and the second driving member 262 is connected to the second clamping head 264, and is used to drive the second clamping head 264 to move in the direction close to the first clamping head 263. The first clamping head 263 and the second clamping head 264 are symmetrically arranged along the horizontal plane, and are used to respectively abut two oppositely arranged side surfaces on the edging plate 70. The side surfaces abutted by the first clamping head 263 and the side surfaces abutted by the bonding unit 25 are two adjacent side surfaces on the edging plate 70, and the side surfaces abutted by the second clamping head 264 and the side surfaces abutted by the bonding unit 25 are two adjacent side surfaces on the edging plate 70.

[0061] Therefore, the positioning unit is provided with a first clamping head 263 and a second clamping head 264 to clamp the upper and lower sides of the edging plate 70, which is used to limit the upper and lower relative positions of the edging plate 70 and the metal plate 60, and cooperates with the laminating unit 25 to limit the spacing between the edging plate 70 and the metal plate 60, so as to fully ensure that the weld between the edging plate 70 and the metal plate 60 meets the requirements of the upper and lower positions and the left and right positions. At the same time, the first driving member 261 and the second driving member 262 are respectively provided to drive the first clamping head 263 and the second clamping head 264 to move relative to each other, which can effectively adjust the distance between the first clamping head 263 and the second clamping head 264, leaving more operating space for the installation of the edging plate 70, and can clamp the edging plates 70 of different heights, effectively broadening the scope of application of the laser welding fixture 100.

[0062] Furthermore, if Figure 3 As shown, in one embodiment, the first clamping head 263 is in rolling contact with the edge binding plate 70 , and the second clamping head 264 is in rolling contact with the edge binding plate 70 .

[0063] In this specific embodiment, the first clamping head 263 includes a first roller bracket and a first roller. The first roller bracket is connected to the output portion of the first driving member 261, and the first roller is connected to the first roller bracket. The circumferential surface of the first roller abuts against the edging plate 70, and the rotation axis of the first roller is arranged in the horizontal direction and is perpendicular to the guide of the guide rail 21.

[0064] It can be understood that the structure of the second clamping head 264 can be the same as or different from the first clamping head 263. In order to make the force on both sides of the edging plate 70 uniform and improve the stability of clamping, the structure of the second clamping head 264 is the same as the first clamping head 263. The second clamping head 264 includes a second roller bracket and a second roller. The second roller bracket is connected to the output part of the second driving member 262, and the second roller is connected to the second roller bracket. The circumferential surface of the second roller abuts against the edging plate 70, and the rotation axis of the second roller is arranged in the horizontal direction and is perpendicular to the guide of the guide rail 21.

[0065] Optionally, the second clamping head 264 and the first clamping head 263 may also be provided with small wheels and ball bearings to achieve rolling contact with the edge plate 70 .

[0066] The first clamping head 263 and the second clamping head 264 are in rolling contact with the edging plate 70. When the clamping assembly moves along the guide rail 21 with the second bracket 24, the first clamping head 263 and the second clamping head 264 can roll on the side of the edging plate 70. The friction between the edging plate 70 is small, thereby avoiding affecting the movement of the positioning unit 26 along the guide rail 21 and scratching the edging plate 70.

[0067] Specifically, Figure 5 , Figure 7As shown, in one embodiment, the metal plate fixing mechanism 10 further includes a slide rail 14 , which is fixed on the workpiece platform 11 , and the pressing plate lifting unit 13 is connected to the slide rail 14 , so that the pressing plate 12 can move integrally along the slide rail 14 .

[0068] Furthermore, the guide of the slide rail 14 is in the direction in which the metal plate 60 and the edging plate 70 are relatively set, that is, the pressure plate 12 can move closer to or away from the edging plate 70 along the slide rail 14. The slide rail 14 can be an I-shaped slide rail. The pressure plate lifting unit 13 is provided with a pressure plate slider 133 that cooperates with the slide rail 14. The pressure plate slider 133 can drive the pressure plate 12 to move closer to or away from the edging plate 70 along the slide rail 14. The slide rail 14 is conducive to the movement of the pressure plate 12 along the width direction of the metal plate 60. Therefore, the pressure plate 12 can press the metal plate 60 at different width positions, which is convenient for fixing metal plates 60 of different widths or shapes.

[0069] Among them, the platen lifting unit 13 can be a manual screw lifting structure, as long as it can realize the function of lifting and lowering the platen 12. In this solution, the platen lifting unit 13 includes a lifting fixture 131 and a lifting cylinder 132. The lifting fixture 131 is connected to the slide rail 14. The lifting cylinder 132 is arranged on the lifting fixture 131. The output part of the lifting cylinder 132 is connected to the platen 12, which is used to drive the platen 12 to move in the vertical direction, so that the platen 12 is close to or away from the metal plate 60. A plurality of guide rods are also arranged between the lifting fixture 131 and the platen 12, and the guide rods are movably connected to the platen 12 through the lifting fixture 131, so as to improve the stability and reliability of lifting.

[0070] like Figure 8 As shown, in this specific embodiment, two pressing plate lifting units 13 are provided and connected to both ends of the pressing plate 12 , so that both ends of the pressing plate 12 can be lifted and lowered simultaneously, thereby expanding the installation space of the metal plate 60 .

[0071] Furthermore, a plurality of buffer plates 121 are sequentially arranged on one side of the pressing plate 12 for fitting the metal plate 60. The buffer plates 121 may be rubber plates for increasing the friction between the pressing plate 12 and the metal plate 60, and the plurality of buffer plates 121 are sequentially arranged along the length direction of the pressing plate 12.

[0072] In this specific embodiment, the distance between two adjacent buffer plates 121 can be equal or unequal. When the distance between two adjacent buffer plates 121 can be equal, multiple buffer plates 121 are evenly spaced. Or when the distance between two adjacent buffer plates 121 is unequal, the distance between two adjacent buffer plates 121 can be set according to the stress distribution of the metal plate. The distance between two adjacent buffer plates 121 presents a normal distribution, first increasing to a maximum and then decreasing.

[0073] Specifically, Figure 2 and Figure 6 As shown, in one embodiment, at least one welding head mounting portion is further provided on the second bracket 24 for fixing and mounting a laser welding head 30. When the first bracket 23 drives the second bracket 24 to move along the guide rail 21, the laser welding head 30 welds the metal plate 60 to be welded and the edging plate 70.

[0074] In this specific embodiment, Fig.10 As shown, two laser welding heads are provided on the second bracket 24. The two laser welding heads 30 are fixed on the second bracket 24 and arranged opposite to each other in the vertical direction. When the first bracket 23 drives the second bracket 24 to move along the guide rail 21, the two laser welding heads 30 weld the metal plate 60 to be welded and the edging plate 70 at the same time.

[0075] Furthermore, if Figure 2 As shown, in one embodiment, the laser welding fixture 100 is provided with a laser controller 31, a laser generator 32 and a laser fixture 33. The laser fixture 33 is connected to the second bracket 24. The laser controller 31, the laser generator 32 and the laser welding head 30 are all arranged on the laser fixture 33. The laser welding head 30 is connected to the laser generator 32 for guiding the laser generated by the first laser generator 32 to be projected to a preset position. The laser controller 31 is connected to the laser generator 32 for controlling the time, intensity and other parameters of the laser generated by the laser generator 32, as well as controlling the switch of the laser generator 32.

[0076] Furthermore, if Figure 6 As shown, in one embodiment, the laser welding fixture 100 is further provided with a z-axis spacing adjustment component 34 and a y-axis spacing adjustment component 35, the z-axis spacing adjustment component 34 is connected to the second bracket 24, the y-axis spacing adjustment component 35 is connected to the z-axis spacing adjustment component 34, the laser welding head 30 is connected to the y-axis spacing adjustment component 35, the y-axis spacing adjustment component 35 is used to drive the laser welding head 30 to move along the y-axis, and the z-axis spacing adjustment component 34 is used to drive the laser welding head 30 to move along the z-axis. The y-axis direction and the z-axis direction are perpendicular to each other and are both perpendicular to the guide of the guide rail 21.

[0077] Specifically, Figure 6 As shown, in one embodiment, the elastic unit 22 includes a main push cylinder 221 and a guide support rod 222, the cylinder seat and the cylinder rod of the main push cylinder 221 are respectively connected to the first bracket 23 and the second bracket 24, and the guide support rod 222 passes through the first bracket 23 to connect to the second bracket 24, or passes through the second bracket 24 to connect to the first bracket 23. The main push cylinder 221 is a spring cylinder.

[0078] It is understandable that the elastic unit 22 may also be a spring assembly and a hydraulic cylinder, as long as the relative movement of the second bracket 24 between the first brackets 23 and the elastic pressing of the fitting unit 25 can be achieved.

[0079] Furthermore, if Figure 6 As shown, in one embodiment, at least three guide support rods 222 are arranged around the main push cylinder 221.

[0080] Specifically, Figure 6 , Figure 7 and Figure 8 As shown, in one embodiment, the positioning unit 26 also includes a limiter 40, which is connected to the workpiece table 11, and the limiter 40 includes a limiter plate 41 and a moving mechanism 42, and the moving mechanism 42 drives the limiter plate 41 to be in a limited state and an open state; when in the limited state, the limiter plate 41 fits the edging plate 70 and presses the edging plate 70 against one side of the metal plate 60 to be welded; when in the open state, the limiter plate 41 leaves the edging plate 70; the limiter 40 is located on one side of the guide rail 21, and when the edging plate fixing mechanism moves along the guide rail to the position of the limiter, the limiter can be in the open state for avoidance.

[0081] Among them, at least two limiters 40 are arranged on the workpiece table 11, each limiter 40 includes a limit plate 41 and a moving mechanism 42, the moving mechanism 42 drives the limit plate 41 to be in a limit state and an open state; when in the limit state, the limit plate 41 fits the edging plate 70 and presses the edging plate 70 against one side of the metal plate 60 to be welded; when in the open state, the limit plate 41 leaves the edging plate 70; the limiter 40 is located on one side of the guide rail 21 and is arranged along the direction of the guide rail 21, when the edging plate fixing mechanism 20 moves along the guide rail 21 to the position of one of the limiters 40, the limiter 40 can be in the open state for avoidance.

[0082] The limiter 40 on the laser welding fixture 100 is always located behind the bonding unit 25, and the moving mechanism 42 can drive the limit plate 41 to switch between the limit state and the open state. When the limit plate 41 is in the limit state, the bonding unit 25 and the limit plate 41 fix the relative positions of the metal plate 60 and the edge plate 70 along the length direction to ensure that the edge plate 70 remains stationary before the weld between the metal plate 60 and the edge plate 70 is formed; when the front limit plate 41 is in the open state, the rear limit plate 41 is still However, it is in a limited state, and the weld between this part of the edging plate 70 and the metal plate 60 of the previous limiting plate 41 has been formed. The edging plate 70 no longer needs the support of the previous limiting plate 41. The laser welding head 30 and the edging unit move to the position of the previous limiting plate 41 to weld the edging plate 70 and the metal plate 60 at the position of the previous limiting plate 41. Therefore, the limiting plate 41 can not only fix the relative position of the metal plate 60 and the edging plate 70, but also cooperate with the edging unit to improve the fixing effect of the edging plate 70.

[0083] Furthermore, if Figure 7 and Fig. 9 As shown, in one embodiment, the limit plate 41 is movably connected to the workpiece table 11 so that it can rotate around a horizontal axis relative to the workpiece table 11. The moving mechanism 42 is a telescopic cylinder, which is rotatably connected to the workpiece table 11 so that it can rotate around a horizontal axis relative to the workpiece table 11. The output shaft of the telescopic cylinder is rotatably connected to the limit plate 41 around a horizontal axis. When the telescopic cylinder is in an extended state, the limit plate 41 is in a limited state. When the telescopic cylinder is in a retracted state, the limit plate 41 is in an open state. A working surface for placing a metal plate 60 is provided on the workpiece table 11. When the telescopic cylinder switches from an extended state to a retracted state, the limit plate 41 rotates in a direction away from the working surface.

[0084] Furthermore, if Fig. 9 As shown, in one embodiment, the limit plate 41 includes a supporting portion 411 and a fitting portion 412 that are connected to each other. The supporting portion 411 is rotatably connected to the workpiece stage 11, and the moving mechanism 42 is rotatably connected to the supporting portion 411. When the limit plate 41 is in a limited state, the supporting portion 411 is parallel to the working surface and is used to support the edge plate 70. The fitting portion 412 is located on the side of the edge plate 70 away from the metal plate 60 and abuts against the edge plate 70. When the limit plate 41 is in an open state, the supporting portion 411 forms an angle with the working surface, and the angle between the supporting portion 411 and the working surface is greater than 45°. In order to avoid the blocking of the laser by the limit plate 41 and the interference of the limit plate 41 with the movement of the bracket along the guide rail 21, the angle between the supporting portion 411 and the workpiece stage 11 can be set to 90 degrees.

[0085] Among them, the support portion 411 and the fitting portion 412 are arranged at an angle to each other, and the angle between the support portion 411 and the fitting portion 412 depends on the connection direction of the metal plate 60 and the edging plate 70. Generally speaking, the edging plate 70 is arranged parallel to the side of the metal plate 60, and the support portion 411 and the fitting portion 412 can be arranged perpendicular to each other.

[0086] In this specific embodiment, Fig. 9 As shown, a first fine-tuning bolt 43 is provided on the limit plate 41, and the first fine-tuning bolt 43 passes through the support portion 411 and abuts against the workpiece table 11. Therefore, by rotating the first fine-tuning bolt 43, the height distance between the support plate and the workpiece table 11 can be controlled, and then the relative height position of the edging plate 70 and the metal plate 60 can be controlled, ensuring that the upper side surface of the edging plate 70 is aligned with the upper side surface of the metal plate 60, thereby improving the flexibility of the height position of the edging plate 70 and the metal plate 60 during welding.

[0087] Among them, a fine-tuning plate 44 and a second fine-tuning bolt 45 are provided on the limiting plate 41. The fine-tuning plate 44 is provided on the supporting portion 411 and is used to abut against the edging plate 70. The second fine-tuning bolt 45 passes through the fitting portion 412 and is connected to the fine-tuning plate 44. By rotating the second fine-tuning bolt 45, the fine-tuning plate 44 can be pushed, thereby adjusting the size of the gap between the edging plate 70 and the metal plate 60 to ensure that the edging plate 70 and the metal plate 60 are fully fitted.

[0088] In this specific embodiment, a right-angle groove is provided on the fine-tuning plate 44, and the edging plate 70 is placed in the right-angle groove.

[0089] Further, in one embodiment, a sensor is provided on one side of each stopper 40, and when the sensor detects the second bracket 24, the corresponding stopper 40 is converted from the limit state to the open state. The sensor is electrically connected to the moving mechanism 42 of the corresponding stopper 40, and when the sensor detects the second bracket 24, the moving mechanism 42 drives the stopper 40 to be converted from the limit state to the open state.

[0090] Specifically, Figure 1 and Figure 7 As shown, in one embodiment, the synchronous welding device also includes an equipment main frame 50, and the equipment main body includes a first main frame 51 for fixing the guide rail 21 and a second main frame 52 for fixing the workpiece table 11. The first main frame 51 and the second main frame 52 are detachably connected. A plurality of legs 53 are provided on the first main frame 51 and the second main frame 52. The legs 53 are connected to the first main frame 51 or the second main frame 52 through the legs 53 connecting pieces. The legs 53 are connected to the legs 53 connecting pieces through adjusting bolts. Therefore, the height of the legs 53 can be changed by rotating the adjusting bolts, so that the horizontality and working height of the first main frame 51 or the second main frame 52 can be adjusted conveniently.

[0091] like Figure 2 and Figure 3 As shown, in one embodiment, a edging plate fixing mechanism 20 is provided, comprising a guide rail 21, an elastic unit 22, a first bracket 23, a second bracket 24, a fitting unit 25 and a positioning unit 26;

[0092] The first bracket 23 is connected and can move along the guide rail 21, the elastic unit 22 is connected to the first bracket 23, and the fitting unit 25 is connected to the elastic unit 22 via the second bracket 24;

[0093] The laminating unit 25 presses the edge plate 70 to be welded onto one side of the metal plate 60 with welding under the elastic thrust of the elastic unit 22;

[0094] The positioning unit 26 includes a clamping assembly, which is fixed on the second bracket 24 . The clamping direction of the positioning unit 26 is perpendicular to the elastic thrust direction of the elastic unit 22 .

[0095] The above-mentioned edging plate fixing mechanism 20 is used to fix the edging plate 70 when the metal plate 60 is welded and edged, so that the relative position of the edging plate 70 and the metal plate 60 remains unchanged, thereby ensuring the reliability of welding. The elastic unit 22 presses the edging plate 70 against the side of the metal plate 60 through the fitting unit 25, and the clamping assembly is used to clamp the upper and lower sides of the edging plate 70 to limit the upper and lower relative positions of the edging plate 70 and the metal plate 60, thereby fully ensuring that the weld between the edging plate 70 and the metal plate 60 meets the requirements of the upper and lower positions and the left and right positions. Since the bonding unit 25 and the clamping assembly can move along the guide rail 21 following the first bracket 23, the welding head can move along the weld to achieve pressure fixation of different welding positions of the edging plate 70. Since the elastic unit 22 can prevent the gap between the edging plate 70 and the metal plate 60 from being too large or too small to affect the formation of the weld, and the guide rail 21 enables the bonding unit 25 to dynamically press the part of the edging plate 70 being welded, the fixing effect is good, which is beneficial to improving the quality of weld formation.

[0096] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like 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 present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0097] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0098] In the present invention, unless otherwise clearly specified and limited, the term "installed on" can be equivalent to "connected", and the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0099] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0100] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0101] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A laser welding and fixing device for metal plate hemming, characterized in that: It comprises a metal plate fixing mechanism (10) and an edge plate fixing mechanism (20); The metal plate fixing mechanism (10) comprises a workpiece platform (11), a pressing plate (12) and a pressing plate lifting unit (13); both ends of the pressing plate (12) are arranged on the workpiece platform (11) via the pressing plate lifting unit (13); and the metal plate (60) to be welded is pressed between the pressing plate (12) and the workpiece platform (11); The edge plate fixing mechanism (20) comprises a guide rail (21), an elastic unit (22), a first bracket (23), a second bracket (24) and a bonding unit (25), wherein the first bracket (23) is mounted on the guide rail (21) and can move along the guide rail (21), the elastic unit (22) is mounted on the first bracket (23), the bonding unit (25) is mounted on the elastic unit (22) via the second bracket (24), and the bonding unit (25) presses the edge plate (70) to be welded against one side of the metal plate (60) under the elastic thrust of the elastic unit (22); the edge plate fixing mechanism (20) further comprises a positioning unit (26), wherein the positioning unit (26) comprises a clamping assembly, wherein the clamping assembly is fixed on the second bracket (24), and the clamping direction of the positioning unit (26) is perpendicular to the elastic thrust direction of the elastic unit (22), and the positioning unit (26) clamps and fixes a pair of side edges of the edge plate (70); The metal plate (60) and the pressing plate (12) have a first maximum static friction force, the metal plate (60) and the workpiece table (11) have a second maximum static friction force, the elastic unit (22) has an elastic thrust on the laminating unit (25), and the combined force of the first maximum static friction force and the second maximum static friction force is greater than or equal to the elastic thrust; The second bracket (24) is also provided with at least one welding head mounting portion for fixedly mounting a laser welding head (30); when the first bracket (23) drives the second bracket (24) to move along the guide rail (21), the laser welding head (30) welds the metal plate (60) to be welded and the edge plate (70).

2. A metal plate hemming laser welding and fixing device according to claim 1, characterized in that: The laminating unit (25) is in line contact with the edge binding plate (70).

3. The metal plate hemming laser welding and fixing device according to claim 1, characterized in that: The fitting unit (25) is one or more ball bearings, and the side edges of the one or more ball bearings contact the edge wrapping plate (70).

4. The metal plate hemming laser welding and fixing device according to claim 1, characterized in that: The clamping assembly comprises a first driving member (261), a second driving member (262), a first clamping head (263) and a second clamping head (264); the first clamping head (263) and the second clamping head (264) are respectively moved towards each other by the first driving member (261) and the second driving member (262), thereby clamping and fixing a pair of side edges of the edging plate (70).

5. The metal plate hemming laser welding and fixing device according to claim 4, characterized in that: The first clamping head (263) is in rolling contact with the edge binding plate (70), and the second clamping head (264) is in rolling contact with the edge binding plate (70).

6. The metal plate hemming laser welding and fixing device according to claim 1, characterized in that: The positioning unit (26) further comprises a limiter (40), wherein the limiter (40) is mounted on the workpiece platform (11), and the limiter (40) comprises a limiter plate (41) and a moving mechanism (42), wherein the moving mechanism (42) drives the limiter plate (41) to be in a limit state and an open state; when in the limit state, the limiter plate (41) fits the edge plate (70) and presses the edge plate (70) against one side of the metal plate (60) to be welded; when in the open state, the limiter plate (41) leaves the edge plate (70); The stopper (40) is located on one side of the guide rail (21); when the edge plate fixing mechanism (20) moves along the guide rail (21) to the position of the stopper (40), the stopper (40) can be in an open state for avoidance.

7. The metal plate hemming laser welding and fixing device according to claim 6, characterized in that: A sensor is provided on one side of the limiter (40); when the sensor detects the second bracket (24), the corresponding limiter (40) is converted from a limit state to an open state.

8. The metal plate hemming laser welding and fixing device according to claim 1, characterized in that: The metal plate fixing mechanism (10) further comprises a slide rail (14), wherein the slide rail (14) is fixed on the workpiece platform (11), and the pressure plate lifting unit (13) is mounted on the slide rail (14), so that the pressure plate (12) can move as a whole along the slide rail (14).

9. The metal plate hemming laser welding and fixing device according to claim 1, characterized in that: A plurality of buffer plates (121) are sequentially provided on one side of the pressing plate (12) for fitting the metal plate (60).

10. The metal plate hemming laser welding and fixing device according to claim 1, characterized in that: The elastic unit (22) comprises a main push cylinder (221) and a guide support rod (222); the cylinder seat and the cylinder rod of the main push cylinder (221) are respectively mounted on a first bracket (23) and a second bracket (24); the guide support rod (222) passes through the first bracket (23) and is mounted on the second bracket (24), or passes through the second bracket (24) and is mounted on the first bracket (23).

11. A metal plate hemming laser welding and fixing device according to claim 10, characterized in that: At least three guide support rods (222) are arranged around the main push cylinder (221).

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