Laser welding device and welding method for towel rack

Abstract

The present invention discloses a laser welding device and a welding method for a towel rack, which relates to the field of laser welding devices, including a mechanical arm, a laser welding machine installed on the mechanical arm, and a welding table under the laser welding machine. Two longitudinal rod fixing assemblies and a plurality of cross rod fixing assemblies are arranged on the welding table. The two longitudinal rod fixing assemblies are provided with a longitudinal rod adjustment assembly, and the longitudinal rod adjustment assembly can adjust the spacing between the two longitudinal rod fixing assemblies. During welding, the cross rod and the longitudinal rod are fixed, and the cross rod and the longitudinal rod are not easy to move during welding, so as to ensure the welding accuracy, and the spacing between the two longitudinal rods can be adjusted, so that cross rods of different lengths can be fixed, so that cross rods of different lengths are located between the two longitudinal rods, and the adaptability is improved. The spacing between a plurality of cross rod fixing assemblies can be adjusted, and the spacing between a plurality of cross rods can be adjusted to meet the requirements of cross rods with different spacings, and the spacing of a plurality of cross rods can be adjusted to ensure the consistency of the spacing, so as to meet the production needs and improve the adjustment accuracy.

Description

Technical Field

[0001] The invention relates to the field of laser welding devices, and in particular to a laser welding device and a welding method for a towel rack. Background Art

[0002] Laser welding device, also known as laser welder or laser welder, is a welding equipment that uses high-energy laser pulses to locally heat the material. The energy of laser radiation diffuses into the interior of the material through heat conduction, melting the material to form a specific molten pool, thereby achieving the welding purpose. Laser welding is a new type of welding method, mainly for the welding of thin-walled materials and precision parts, and can realize spot welding, butt welding, stack welding, sealing welding and other welding methods.

[0003] The core working principle of laser welding is based on the high energy density characteristics of laser. The laser first generates a high-brightness, monochromatic and directional laser beam, which is focused into a very small area through a series of optical systems. When the laser beam acts on the surface of the workpiece, due to its extremely high energy, it can instantly melt the surface material of the workpiece and diffuse into the interior of the material through the heat conduction effect to form a local high-temperature molten pool. At the same time, by precisely controlling the laser irradiation time and energy distribution, high-quality connections between different materials can be achieved to form a solid weld.

[0004] When some existing parts such as towel racks, clothes drying racks, shoe racks and other bracket types are welded using laser welding devices, multiple cross bars need to be welded between the longitudinal bars. The longitudinal bars and cross bars need to be placed in appropriate positions and fixed stably on the operating table of the laser welding machine using clamps or other fixing devices before welding.

[0005] Chinese patent CN103170745B discloses a laser welding device, including a workbench, a welding fixture and a control device, wherein the welding fixture includes a fixing plate, a vertical plate, a connecting plate, a first motor, a rotating shaft, a workpiece fixing structure, a second motor and a screw. The rotational movement of the workpiece fixing structure is controlled by the first motor, and the rotation speed of the workpiece fixing structure is determined by the rotation speed of the output shaft of the first motor. Since the rotation speed of the first motor can be set to a preset value, the precise rotation angle of the workpiece fixing structure is ensured. In addition, the lifting and lowering movement of the workpiece fixing structure is driven by the screw rod by the second motor and cooperates with the screw rod nut to achieve it. The screw rod and the screw rod nut cooperate to convert the circular motion of the second motor into precise linear motion, so that the lifting height can be controlled by controlling the rotation speed of the second motor. Therefore, the above-mentioned welding fixture can effectively control the rotation angle and lifting height of the workpiece fixing structure, thereby making the weld points evenly distributed during multi-point welding;

[0006] Chinese patent CN114769865B discloses a laser welding device and welding method for a towel rack with double welding heads, comprising: an incoming material belt, with the material discharging end facing the rotating grasping mechanism; a feeding material belt, with the material feeding end facing the rotating grasping mechanism; a rotating grasping mechanism, which is arranged on a rotating platform and has three rotating positions: a material taking position, a welding position, and a material discharging position; two groups of laser welding machines, which are arranged at the welding position and are located on both sides of the towel rack; a three-dimensional adjustment platform, on which a laser welding machine is movably arranged, and the movement of the laser welding machine is controlled according to a preset program. According to the structural characteristics of the towel rack, a welding trajectory can be obtained according to a model, and then a laser welding method that is easy to control by a program is adopted. Two groups of laser welding machines are arranged on both sides of the towel rack during welding, and laser welding is automatically performed under the control of the three-dimensional adjustment platform according to a preset program, thereby realizing fully automated welding; a rotating grasping mechanism, which positions the towel rack into a vertical state while grasping it, and can eliminate the randomness of the position of the towel rack during transmission.

[0007] The above patents and prior art also have the following defects:

[0008] When welding some brackets, multiple cross bars need to be placed between two longitudinal bars and fixed. Fixing the cross bars and longitudinal bars is troublesome, time-consuming and labor-intensive. The fixing positions of the multiple cross bars and longitudinal bars cannot be adjusted, and the fixing of cross bars and longitudinal bars of different lengths cannot be adapted. The adaptability is poor, and the spacing of the multiple cross bars after fixing cannot be adjusted. The production of frames of different sizes cannot be met. Manual adjustment of the spacing of the multiple cross bars is not accurate, and the spacing between the multiple cross bars cannot be guaranteed to be consistent.

[0009] Specifically, in the process of welding the towel rack, since the towel rack has cross bars with different spacings, the prior art cannot conveniently adjust the fixed position of the cross bars, resulting in low welding efficiency of the towel rack and failure to ensure that the spacings of multiple cross bars are consistent, resulting in poor quality and non-standard size of the towel rack after welding.

[0010] Therefore, the present application provides a laser welding device and a welding method for a towel rack to meet the needs. Summary of the invention

[0011] The purpose of the present application is to provide a laser welding device and a welding method for a towel rack, in which the horizontal bar and the vertical bar are fixed during welding, and the horizontal bar and the vertical bar are not easy to move during welding, thereby ensuring the welding accuracy, and being able to adjust the distance between the two vertical bars, so that horizontal bars of different lengths can be fixed, so that horizontal bars of different lengths are located between the two vertical bars, thereby improving adaptability, and being able to adjust the distance between several horizontal bar fixing assemblies, thereby adjusting the distance between several horizontal bars, and being able to adapt to the requirements of horizontal bars with different distances, adjusting the distance between multiple horizontal bars and ensuring the consistency of the distance, thereby improving adaptability, meeting production needs, and improving adjustment accuracy.

[0012] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a laser welding device, comprising a mechanical arm, a laser welding machine installed on the mechanical arm and a welding table below the laser welding machine, wherein two longitudinal bar fixing assemblies and a plurality of cross bar fixing assemblies are arranged on the welding table, two of the longitudinal bar fixing assemblies are provided with longitudinal bar adjustment assemblies, the longitudinal bar adjustment assemblies can adjust the spacing between the two longitudinal bar fixing assemblies, a cross bar adjustment assembly is arranged between the plurality of cross bar fixing assemblies, the cross bar adjustment assembly can adjust the spacing between the plurality of cross bar fixing assemblies;

[0013] The longitudinal rod fixing assembly and the cross rod fixing assembly are arranged perpendicular to each other and can both fix rod-shaped objects. The cross rod adjustment assembly includes a pushing frame, a pushing screw and a rectangular tube. In two adjacent cross rod fixing assemblies, the pushing frame is arranged on one cross rod fixing assembly, and the pushing screw is arranged on the other cross rod fixing assembly. The pushing frame is threadedly engaged with the pushing screw, and the rectangular tube can drive the pushing screw to rotate when it rotates.

[0014] The welding table is also provided with a cross bar adjustment drive assembly, which includes a rectangular rod that can rotate, a rectangular hole is opened on the rectangular tube and the rectangular hole cooperates with the rectangular rod, and the rectangular tubes in all the cross bar adjustment assemblies are sleeved on the rectangular rod and slidably cooperate with the rectangular rod.

[0015] Preferably, the cross bar fixing assembly includes two cross bar fixing units, and the two cross bar fixing units include a cross bar fixing screw, two cross bar fixing plates and a driving gear. The cross bar fixing screw is a bidirectional thread setting, and the two cross bar fixing plates are both threadedly connected to the cross bar fixing screw. When the driving gear rotates, it can drive the cross bar fixing screw to rotate.

[0016] Preferably, the cross bar fixing unit also includes a cross bar fixing frame, an active bevel gear, a passive bevel gear and a connecting shaft, the cross bar fixing screw is rotatably connected to the cross bar fixing frame, the bottom of the cross bar fixing screw passes through the cross bar fixing frame and is fixedly installed with the passive bevel gear, a connecting support plate is fixedly installed on the cross bar fixing frame, the connecting shaft is rotatably connected to the connecting support plate, the active bevel gear is fixedly installed on one end of the connecting shaft, the driving gear is fixedly installed on the other end of the connecting shaft, and the active bevel gear is meshed with the passive bevel gear.

[0017] Preferably, a cross bar fixing drive assembly is provided on the welding table, and the cross bar fixing drive assembly includes two driving spline shafts, a cross bar fixing motor and a connecting belt member, the driving gears in the two cross bar fixing units are meshed with the corresponding driving spline shafts, the cross bar fixing motor is fixedly mounted on one of the driving spline shafts, and the connecting belt member includes two connecting pulleys and a connecting belt, the two connecting pulleys are respectively fixedly mounted on the corresponding driving spline shafts, and the connecting belt is connected to the two connecting pulleys.

[0018] Preferably, the cross bar fixing assembly also includes a cross bar connecting plate, and the cross bar adjustment assembly also includes a movable plate, a transmission belt member, a fixing block and a stabilizing plate, the cross bar connecting plate is fixedly mounted on the cross bar fixing frame, in two adjacent cross bar connecting plates, the pushing screw is rotatably connected to one of the cross bar connecting plates, the pushing frame is fixedly mounted on the other cross bar connecting plate, the moving plate is fixedly mounted on the cross bar fixing frame, the moving plate is threadedly connected to the pushing screw, the end of the pushing screw is rotatably connected to the stabilizing plate, the cross bar fixing frame passes through the stabilizing plate and slidably cooperates with the stabilizing plate, the fixing block is fixedly mounted on the corresponding cross bar connecting plate, the rectangular cylinder is rotatably connected to the fixing block, and the transmission belt member includes a transmission active pulley, a transmission passive pulley and a transmission belt, the transmission active pulley is fixedly mounted on the pushing screw, the transmission passive pulley is fixedly mounted on the rectangular cylinder, and the transmission belt is connected to the active pulley and the passive pulley.

[0019] Preferably, the longitudinal rod fixing assembly includes two longitudinal rod fixing units, a longitudinal rod screw, a longitudinal rod fixing shell and a longitudinal rod motor. The longitudinal rod fixing unit includes a longitudinal rod fixing frame, a longitudinal rod fixing screw and two longitudinal rod fixing plates. The longitudinal rod fixing screw is a bidirectional thread setting. The two longitudinal rod fixing plates are both threadedly connected to the longitudinal rod fixing screw. The longitudinal rod fixing screw is rotatably connected to the longitudinal rod fixing frame. The longitudinal rod fixing frame is threadedly connected to the longitudinal rod screw. The longitudinal rod fixing frame is slidably fitted in the longitudinal rod fixing shell. The longitudinal rod screw is rotatably connected to the longitudinal rod fixing shell. The longitudinal rod motor is fixedly mounted on the longitudinal rod fixing shell, and the output end of the longitudinal rod motor is fixedly mounted on the longitudinal rod screw.

[0020] Preferably, the longitudinal rod adjustment assembly includes a longitudinal rod adjustment screw, two longitudinal rod adjustment blocks and a longitudinal rod adjustment motor. The longitudinal rod adjustment screw is set with a bidirectional thread. The longitudinal rod adjustment screw is rotatably connected to the welding table. The longitudinal rod adjustment motor is fixedly mounted on the welding table. The output end of the longitudinal rod adjustment motor is fixedly mounted on the longitudinal rod adjustment screw. The two longitudinal rod adjustment blocks are respectively fixedly mounted on the longitudinal rod fixing shell. The longitudinal rod adjustment block is threadedly connected to the longitudinal rod adjustment screw.

[0021] Preferably, the crossbar adjustment drive assembly further comprises a crossbar adjustment motor, the crossbar adjustment motor is fixedly mounted on the welding table, and the output end of the crossbar adjustment motor is fixedly mounted on the rectangular rod.

[0022] Preferably, the cross bar fixing assembly also includes a cross bar limiting rod, which is fixedly mounted on the cross bar fixing frame, the cross bar limiting rod passes through the cross bar fixing plate and is slidably matched with the cross bar fixing plate, and the longitudinal bar fixing assembly also includes a longitudinal bar limiting rod, which is fixedly mounted on the longitudinal bar fixing frame, the longitudinal bar limiting rod passes through the longitudinal bar fixing plate and is slidably matched with the longitudinal bar fixing plate.

[0023] Preferably, a fixed slider is fixedly installed on the bottom of the crossbar connecting plate, a fixed slide rail is fixedly installed on the welding table, and the fixed slider is slidably fitted in the fixed slide rail.

[0024] A towel rack welding method uses the above-mentioned laser welding device.

[0025] In summary, the technical effects and advantages of the present invention are as follows:

[0026] 1. In the present invention, the longitudinal rod and the cross rod can be fixed, and the cross rod is distributed between the two longitudinal rods, which is convenient for welding the cross rod and the longitudinal rod. The cross rod and the longitudinal rod are fixed during welding, and the cross rod and the longitudinal rod are not easy to move during welding, so as to ensure the welding accuracy. The spacing between the two longitudinal rods can be adjusted, so that cross rods of different lengths can be fixed, so that cross rods of different lengths are located between the two longitudinal rods, and the adaptability is improved. The spacing between a plurality of cross rod fixing assemblies can be adjusted, so as to adjust the spacing between a plurality of cross rods, and the requirements of cross rods with different spacings can be met. The rectangular tubes in all the cross rod adjustment assemblies are driven to rotate by the rectangular rod, and it is ensured that when the rectangular tube moves on the rectangular rod, the rectangular rod can still drive the rectangular tube to rotate, and the rectangular tube drives the pushing screw rod, so that the pushing frame pushes the cross rod fixing assembly to move, and the actions of a plurality of cross rod adjustment assemblies can be uniformly operated, and the operation steps can be reduced. It is more convenient to adjust the spacing of the cross rods, and it is ensured that the movement amount of the cross rod fixing assembly pushed by the plurality of cross rod adjustment assemblies is consistent, so as to adjust the spacing of a plurality of cross rods and ensure the consistency of the spacing, improve the adaptability, meet the production needs, and improve the adjustment accuracy.

[0027] 2. In the present invention, the driving spline shaft drives the driving gears in all the crossbar fixing assemblies to rotate, and the driving gear drives the crossbar fixing screw to rotate, thereby driving all the crossbar fixing plates to move, fixing or releasing the crossbar, and the driving spline shaft can make multiple crossbar fixing assemblies to fix or release the crossbar synchronously, saving the steps of sequentially operating the crossbar fixing assemblies to fix the crossbar, facilitating the fixing of the crossbar, improving efficiency, and making it more convenient to use;

[0028] 3. Rotate the longitudinal rod fixing screw, the longitudinal rod fixing plate moves on the longitudinal rod fixing screw, and the longitudinal rod fixing plate moves to clamp the longitudinal rod. When it is necessary to adjust the distance between the two longitudinal rod fixing units to adjust the clamping position of the longitudinal rod, the longitudinal rod motor drives the longitudinal rod screw to rotate, the longitudinal rod screw drives the corresponding longitudinal rod fixing frame to move, and the longitudinal rod fixing frame drives the corresponding longitudinal rod fixing screw and the longitudinal rod fixing plate to move, so as to adjust the clamping position of the longitudinal rod by the longitudinal rod clamping unit. It can not only firmly clamp longitudinal rods of different lengths to keep the longitudinal rod stable during welding, but also make the clamping position avoid the contact position between the longitudinal rod and the cross bar, so as not to affect the welding between the longitudinal rod and the cross bar;

[0029] 4. The welding method for the towel rack can fix the horizontal bar and the vertical bar of the towel rack when welding the towel rack, thereby preventing the horizontal bar and the vertical bar of the towel rack from being displaced during the welding process, and preventing the welding position between the horizontal bar and the vertical bar from being more accurate. The welded towel rack has a more standard size and is not prone to distortion and size changes caused by the misalignment of the horizontal bar and the vertical bar, thereby improving the welding quality of the towel rack. At the same time, the welding positions of multiple horizontal bars can be adjusted to meet the welding and fixing requirements of horizontal bars with different spacings, thereby improving the welding efficiency of towel racks of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 It is a schematic diagram of the structure of the robot arm, laser welding machine and welding table in the present invention;

[0032] Figure 2 It is a structural schematic diagram of the welding table, the crossbar fixing assembly, the longitudinal bar adjustment assembly and the crossbar adjustment assembly in the present invention;

[0033] Figure 3 For the present invention Figure 2 A magnified view of part A;

[0034] Figure 4 It is a structural schematic diagram of the welding table, the longitudinal rod adjustment screw, the longitudinal rod adjustment block and the longitudinal rod adjustment motor in the present invention;

[0035] Figure 5 For the present invention Figure 4 A magnified view of part B;

[0036] Figure 6It is a structural schematic diagram of the welding platform, the longitudinal rod screw, the longitudinal rod fixing shell and the connecting belt member in the present invention;

[0037] Figure 7 For the present invention Figure 6 Enlarged view of part C;

[0038] Figure 8 It is a structural schematic diagram of the welding table and the longitudinal rod fixing assembly in the present invention;

[0039] Fig. 9 For the present invention Figure 8 A magnified view of part D in the middle;

[0040] Fig.10 It is a schematic diagram of the structure of the robot arm, laser welding machine, welding table and longitudinal rod fixing assembly in the present invention.

[0041] In the figure: 1. Robotic arm; 2. Laser welding machine; 3. Welding table; 4. Longitudinal rod fixing assembly; 41. Longitudinal rod screw; 42. Longitudinal rod fixing shell; 43. Longitudinal rod motor; 44. Longitudinal rod fixing frame; 45. Longitudinal rod fixing screw; 46. Longitudinal rod fixing plate; 47. Longitudinal rod limiting rod; 5. Crossbar fixing assembly; 51. Crossbar fixing screw; 52. Crossbar fixing plate; 53. Driving gear; 54. Crossbar fixing frame; 55. Active bevel gear; 56. Passive bevel gear; 57. Crossbar connecting plate; 58. Crossbar limiting rod; 6. Longitudinal rod adjustment assembly; 61, longitudinal rod adjustment screw; 62, longitudinal rod adjustment block; 63, longitudinal rod adjustment motor; 7, crossbar adjustment assembly; 71, push frame; 72, push screw; 73, rectangular cylinder; 74, moving plate; 75, transmission belt; 76, fixed block; 77, stabilizing plate; 8, crossbar adjustment drive assembly; 81, rectangular rod; 82, crossbar adjustment motor; 9, fixed drive assembly; 91, drive spline shaft; 92, crossbar fixing motor; 93, connecting belt; 10, fixed slider; 11, fixed slide rail. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] Example: Reference Figure 1-Figure 10A laser welding device shown in the figure comprises a mechanical arm 1, a laser welding machine 2 installed on the mechanical arm 1 and a welding table 3 under the laser welding machine 2, two longitudinal rod fixing assemblies 4 and a plurality of cross bar fixing assemblies 5 are arranged on the welding table 3, the two longitudinal rod fixing assemblies 4 are provided with a longitudinal rod adjustment assembly 6, the longitudinal rod adjustment assembly 6 can adjust the distance between the two longitudinal rod fixing assemblies 4, a cross bar adjustment assembly 7 is arranged between the plurality of cross bar fixing assemblies 5, and the cross bar adjustment assembly 7 can adjust the distance between the plurality of cross bar fixing assemblies 5;

[0044] The longitudinal rod fixing assembly 4 and the cross rod fixing assembly 5 are arranged perpendicular to each other and can both fix the rod-shaped object. The cross rod adjustment assembly 7 includes a pushing frame 71, a pushing screw 72 and a rectangular tube 73. In two adjacent cross rod fixing assemblies 5, the pushing frame 71 is arranged on one cross rod fixing assembly 5, and the pushing screw 72 is arranged on the other cross rod fixing assembly 5. The pushing frame 71 is threadedly engaged with the pushing screw 72. When the rectangular tube 73 rotates, it can drive the pushing screw 72 to rotate;

[0045] A crossbar adjustment drive assembly 8 is also provided on the welding table 3. The crossbar adjustment drive assembly 8 includes a rectangular rod 81. The rectangular rod 81 can rotate. A rectangular hole is opened on the rectangular tube 73 and the rectangular hole cooperates with the rectangular rod 81. The rectangular tubes 73 in all crossbar adjustment assemblies 7 are sleeved on the rectangular rod 81 and slidably cooperate with the rectangular rod 81.

[0046] The longitudinal rod is fixed by the longitudinal rod fixing assembly 4, and the spacing between the two longitudinal rod fixing assemblies 4 is adjusted by the longitudinal rod adjusting assembly 6, so that the spacing between the two longitudinal rods is consistent with the length of the cross rod, and several cross rods are fixed by the cross rod fixing assembly 5. Since the spacing between the two longitudinal rod fixing assemblies 4 is consistent with the length of the cross rod, the two ends of the cross rod fixed on the cross rod fixing assembly 5 are against the longitudinal rod, and by rotating the rectangular rod 81, the rectangular rod 81 drives the rectangular tube 73 in all the cross rod adjustment assemblies 7 to rotate, and the rectangular tube 73 drives the corresponding pushing screw 72 to rotate, and the pushing frame 71 moves on the pushing screw 72, and the pushing frame 71 pushes the corresponding cross rod fixing assembly 5 to move, thereby changing the spacing between the two cross rod fixing assemblies 5, and the cross rod adjusting assembly 7 adjusts the spacing between several cross rod fixing assemblies 5, thereby adjusting the spacing between several cross rods, and the robot arm 1 drives the laser welding machine 2 to move to weld the cross rod and the longitudinal rod.

[0047] The longitudinal rod and the cross rod can be fixed, and the cross rod is distributed between the two longitudinal rods, which is convenient for welding the cross rod and the longitudinal rod. The cross rod and the longitudinal rod are fixed during welding, and the cross rod and the longitudinal rod are not easy to move during welding, so as to ensure the welding accuracy. The spacing between the two longitudinal rods can be adjusted, so that cross rods of different lengths can be fixed, so that cross rods of different lengths are located between the two longitudinal rods, and the adaptability is improved. The spacing between several cross rod fixing components 5 can be adjusted, so as to adjust the spacing between several cross rods, and can adapt to the requirements of cross rods with different spacings, and all cross rod adjustment components are driven by the rectangular rod 81. The rectangular tube 73 in 7 rotates, and it is ensured that when the rectangular tube 73 moves on the rectangular rod 81, the rectangular rod 81 can still drive the rectangular tube 73 to rotate, and the rectangular tube 73 drives the pushing screw 72, so that the pushing frame 71 pushes the cross bar fixing assembly 5 to move, and can unify the operation of multiple cross bar adjustment assemblies 7, reduce the operation steps, and make it more convenient to adjust the spacing of the cross bars, and ensure that the multiple cross bar adjustment assemblies 7 push the cross bar fixing assembly 5 to move the same amount, thereby adjusting the spacing of multiple cross bars and ensuring the consistency of the spacing, improving adaptability, meeting production needs, and improving adjustment accuracy.

[0048] Further, refer to Figure 1-Figure 10 The cross bar fixing assembly 5 includes two cross bar fixing units, and the two cross bar fixing units include a cross bar fixing screw 51, two cross bar fixing plates 52 and a driving gear 53. The cross bar fixing screw 51 is a bidirectional thread setting, and the two cross bar fixing plates 52 are both threadedly connected to the cross bar fixing screw 51. When the driving gear 53 rotates, it can drive the cross bar fixing screw 51 to rotate.

[0049] The cross bar is placed between the two cross bar fixing plates 52, and the driving gear 53 is rotated. The driving gear 53 drives the cross bar fixing screw 51 to rotate, and the two cross bar fixing plates 52 move toward the cross bar on the cross bar fixing screw 51, and the two cross bar fixing plates 52 clamp and fix the cross bar.

[0050] Further, refer to Figure 1-Figure 10 The cross bar fixing unit also includes a cross bar fixing frame 54, an active bevel gear 55, a passive bevel gear 56 and a connecting shaft, and a cross bar fixing screw 51 is rotatably connected to the cross bar fixing frame 54. The bottom of the cross bar fixing screw 51 passes through the cross bar fixing frame 54 and is fixedly installed with the passive bevel gear 56. A connecting support plate is fixedly installed on the cross bar fixing frame 54, and the connecting shaft is rotatably connected to the connecting support plate. The active bevel gear 55 is fixedly installed at one end of the connecting shaft, and the driving gear 53 is fixedly installed at the other end of the connecting shaft. The active bevel gear 55 and the passive bevel gear 56 are meshed.

[0051] When the driving gear 53 rotates, the driving gear 53 drives the connecting shaft to rotate, the connecting shaft drives the active bevel gear 55 to rotate, the active bevel gear 55 drives the passive bevel gear 56 to rotate, and the passive bevel gear 56 drives the crossbar fixing screw 51 to rotate, so that the two crossbar fixing plates 52 move to clamp the crossbar.

[0052] Further, refer to Figure 1-Figure 10 A crossbar fixing drive assembly 9 is provided on the welding table 3. The crossbar fixing drive assembly 9 includes two driving spline shafts 91, a crossbar fixing motor 92 and a connecting belt member 93. The driving gears 53 in the two crossbar fixing units are meshed with the corresponding driving spline shafts 91. The crossbar fixing motor 92 is fixedly mounted on one of the driving spline shafts 91. The connecting belt member 93 includes two connecting pulleys and a connecting belt. The two connecting pulleys are respectively fixedly mounted on the corresponding driving spline shafts 91, and the connecting belt is connected to the two connecting pulleys.

[0053] The cross bar fixing motor 92 drives one of the driving spline shafts 91 to rotate, and the driving spline shaft 91 drives the corresponding connecting pulley to rotate. This connecting pulley rotates another connecting pulley through the connecting belt, and the other connecting pulley drives another driving spline shaft 91 to rotate, so that the two driving spline shafts 91 rotate synchronously, and the driving spline shaft 91 drives the driving gear 53 to rotate, and the driving gear 53 drives the corresponding cross bar fixing screw 51 to rotate, so that the two cross bar fixing plates 52 move to fix the cross bar. At the same time, when the cross bar fixing assembly 5 moves, it drives the driving gear 53 to move, and the driving gear 53 moves on the driving spline shaft 91. The driving spline shaft 91 can still drive the driving gear 53 to rotate, thereby moving the cross bar fixing plate 52 to clamp the cross bar.

[0054] The driving spline shaft 91 drives the driving gear 53 in all the cross bar fixing assemblies 5 to rotate, and the driving gear 53 drives the cross bar fixing screw 51 to rotate, thereby driving all the cross bar fixing plates 52 to move, fixing or releasing the cross bar. By driving the spline shaft 91, multiple cross bar fixing assemblies 5 can be synchronously fixed or released, saving the steps of operating the cross bar fixing assemblies 5 to fix the cross bar in sequence, facilitating the fixation of the cross bar, improving efficiency, and being more convenient to use.

[0055] Further, refer to Figure 1-Figure 10The crossbar fixing assembly 5 also includes a crossbar connecting plate 57, and the crossbar adjustment assembly 7 also includes a moving plate 74, a driving belt member 75, a fixing block 76 and a stabilizing plate 77. The crossbar connecting plate 57 is fixedly mounted on the crossbar fixing frame 54. In two adjacent crossbar connecting plates 57, the pushing screw 72 is rotatably connected to one of the crossbar connecting plates 57, and the pushing frame 71 is fixedly mounted on the other crossbar connecting plate 57. The moving plate 74 is fixedly mounted on the crossbar fixing frame 54, and the moving plate 74 is threadedly connected to the pushing screw 72. The end of the movable screw 72 is rotatably connected to the stabilizing plate 77, the cross bar fixing frame 54 passes through the stabilizing plate 77 and slidably cooperates with the stabilizing plate 77, the fixing block 76 is fixedly installed on the corresponding cross bar connecting plate 57, the rectangular cylinder 73 is rotatably connected to the fixing block 76, and the transmission belt member 75 includes a transmission driving pulley, a transmission passive pulley and a transmission belt. The transmission driving pulley is fixedly installed on the pushing screw 72, and the transmission passive pulley is fixedly installed on the rectangular cylinder 73, and the transmission belt is connected to the driving pulley and the passive pulley.

[0056] When the rectangular rod 81 rotates, it drives the rectangular tube 73 to rotate, and the rectangular tube 73 drives the driving drive pulley to rotate. The driving drive pulley rotates the driven drive pulley through the transmission belt, and the driven drive pulley drives the corresponding pushing screw 72 to rotate. The moving plate 74 moves on the pushing screw 72, and the moving plate 74 drives the pushing frame 71 to move. The pushing frame 71 drives another cross bar connecting plate 57 to move, thereby moving the other cross bar fixing component 5.

[0057] Further, refer to Figure 1-Figure 10 The longitudinal rod fixing assembly 4 includes two longitudinal rod fixing units, a longitudinal rod screw 41, a longitudinal rod fixing shell 42 and a longitudinal rod motor 43. The longitudinal rod fixing unit includes a longitudinal rod fixing frame 44, a longitudinal rod fixing screw 45 and two longitudinal rod fixing plates 46. The longitudinal rod fixing screw 45 is a bidirectional thread setting. The two longitudinal rod fixing plates 46 are both threadedly connected to the longitudinal rod fixing screw 45. The longitudinal rod fixing screw 45 is rotatably connected to the longitudinal rod fixing frame 44. The longitudinal rod fixing frame 44 is threadedly connected to the longitudinal rod screw 41. The longitudinal rod fixing frame 44 is slidably fitted in the longitudinal rod fixing shell 42. The longitudinal rod screw 41 is rotatably connected to the longitudinal rod fixing shell 42. The longitudinal rod motor 43 is fixedly installed on the longitudinal rod fixing shell 42, and the output end of the longitudinal rod motor 43 is fixedly installed on the longitudinal rod screw 41.

[0058] The longitudinal rod fixing screw 45 is rotated, and the longitudinal rod fixing plate 46 moves on the longitudinal rod fixing screw 45, and the longitudinal rod fixing plate 46 moves to clamp the longitudinal rod. When it is necessary to adjust the distance between the two longitudinal rod fixing units to adjust the clamping position of the longitudinal rod, the longitudinal rod motor 43 drives the longitudinal rod screw 41 to rotate, and the longitudinal rod screw 41 drives the corresponding longitudinal rod fixing frame 44 to move, and the longitudinal rod fixing frame 44 drives the corresponding longitudinal rod fixing screw 45 and the longitudinal rod fixing plate 46 to move, so as to adjust the clamping position of the longitudinal rod by the longitudinal rod clamping unit, which can not only firmly clamp longitudinal rods of different lengths and keep the longitudinal rod stable during welding, but also make the clamping position avoid the contact position between the longitudinal rod and the cross bar, so as not to affect the welding of the longitudinal rod and the cross bar.

[0059] Further, refer to Figure 1-Figure 10 The longitudinal rod adjustment assembly 6 includes a longitudinal rod adjustment screw 61, two longitudinal rod adjustment blocks 62 and a longitudinal rod adjustment motor 63. The longitudinal rod adjustment screw 61 is a bidirectional thread setting. The longitudinal rod adjustment screw 61 is rotatably connected to the welding table 3. The longitudinal rod adjustment motor 63 is fixedly installed on the welding table 3. The output end of the longitudinal rod adjustment motor 63 is fixedly installed on the longitudinal rod adjustment screw 61. The two longitudinal rod adjustment blocks 62 are respectively fixedly installed on the longitudinal rod fixed shell 42. The longitudinal rod adjustment blocks 62 are threadedly connected to the longitudinal rod adjustment screw 61.

[0060] When it is necessary to adjust the spacing between the two longitudinal rod fixing assemblies 4 so that the spacing between the two longitudinal rod fixing assemblies 4 is suitable for the length of the cross bar, the longitudinal rod adjustment motor 63 drives the longitudinal rod adjustment screw 61 to rotate, and the two longitudinal rod adjustment blocks 62 move on the longitudinal rod adjustment screw 61. The two longitudinal rod adjustment blocks 62 drive the corresponding longitudinal rod fixing shells 42 to move, thereby driving the corresponding longitudinal rod fixing assemblies 4 to move, and adjusting the spacing between the two longitudinal rod fixing assemblies 4 to the length of the cross bar, so that cross bars of different lengths can be placed between the two longitudinal bars for welding, thereby improving adaptability.

[0061] Further, refer to Figure 1-Figure 10 The crossbar adjustment drive assembly 8 also includes a crossbar adjustment motor 82 , which is fixedly mounted on the welding table 3 , and an output end of the crossbar adjustment motor 82 is fixedly mounted on the rectangular rod 81 .

[0062] The crossbar adjustment motor 82 drives the rectangular rod 81 to rotate, the rectangular rod 81 drives the rectangular tube 73 to rotate, and the rectangular tube 73 drives the corresponding push screw 72 to rotate.

[0063] Further, refer to Figure 1-Figure 10The crossbar fixing assembly 5 also includes a crossbar limiting rod 58, which is fixedly mounted on the crossbar fixing frame 54, and the crossbar limiting rod 58 passes through the crossbar fixing plate 52 and slides with the crossbar fixing plate 52. The longitudinal bar fixing assembly 4 also includes a longitudinal bar limiting rod 47, which is fixedly mounted on the longitudinal bar fixing frame 44, and the longitudinal bar limiting rod 47 passes through the longitudinal bar fixing plate 46 and slides with the longitudinal bar fixing plate 46.

[0064] The crossbar fixing plate 52 moves on the crossbar limiting rod 58, so that the crossbar fixing plate 52 moves more stably and has a better clamping and fixing effect on the crossbar. The longitudinal bar fixing plate 46 moves on the longitudinal bar limiting rod 47, so that the longitudinal bar fixing plate 46 moves more stably and has a better clamping and fixing effect on the longitudinal bar.

[0065] Further, refer to Figure 1-Figure 10 A fixed slider 10 is fixedly installed at the bottom of the crossbar connecting plate 57 , a fixed slide rail 11 is fixedly installed on the welding table 3 , and the fixed slider 10 is slidably fitted in the fixed slide rail 11 .

[0066] When the crossbar connecting plate 57 moves, the fixed slider 10 is driven to move, and the fixed slider 10 moves in the fixed slide rail 11, so that the movement of the crossbar fixing assembly 5 is more stable.

[0067] A crossbar clamping groove is provided on the crossbar fixing plate 52, and a longitudinal bar clamping groove is provided on the longitudinal bar fixing plate 46, so as to achieve a better clamping effect on the crossbar and the longitudinal bar.

[0068] The upper and lower symmetrical planes of the cross bar fixing screw 51 and the upper and lower symmetrical planes of the longitudinal bar fixing screw 45 are located in the same plane. The cross bar fixing plate 52 clamps cross bars of different diameters and is located in the middle part of the longitudinal bar fixing plate 46 clamps longitudinal bars of different diameters, so that the cross bars welded on the longitudinal bars will not deviate, thereby ensuring the welding quality.

[0069] The number of the plurality of cross bar fixing assemblies 5 is an odd number, the cross bar connecting plate 57 in the middle cross bar fixing assembly 5 among the plurality of cross bar fixing assemblies 5 is fixedly installed on the welding table 3, and the cross bar connecting plate 57 in the middle cross bar fixing assembly 5 among the plurality of cross bar fixing assemblies 5 is located in the middle position of the two longitudinal bar fixing assemblies 4.

[0070] A towel rack welding method uses the above-mentioned laser welding device.

[0071] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A laser welding device, comprising a mechanical arm (1), a laser welding machine (2) mounted on the mechanical arm (1), and a welding table (3) below the laser welding machine (2), characterized in that: The welding table (3) is provided with two longitudinal rod fixing assemblies (4) and a plurality of cross rod fixing assemblies (5); the two longitudinal rod fixing assemblies (4) are provided with longitudinal rod adjustment assemblies (6); the longitudinal rod adjustment assemblies (6) are capable of adjusting the spacing between the two longitudinal rod fixing assemblies (4); a cross rod adjustment assembly (7) is provided between the plurality of cross rod fixing assemblies (5); the cross rod adjustment assembly (7) is capable of adjusting the spacing between the plurality of cross rod fixing assemblies (5); The longitudinal rod fixing assembly (4) and the cross rod fixing assembly (5) are arranged perpendicular to each other and can both fix a rod-shaped object. The cross rod adjustment assembly (7) comprises a pushing frame (71), a pushing screw (72) and a rectangular tube (73). In two adjacent cross rod fixing assemblies (5), the pushing frame (71) is arranged on one cross rod fixing assembly (5), and the pushing screw (72) is arranged on the other cross rod fixing assembly (5). The pushing frame (71) is threadedly engaged with the pushing screw (72), and when the rectangular tube (73) rotates, it can drive the pushing screw (72) to rotate. The welding table (3) is also provided with a crossbar adjustment drive assembly (8), the crossbar adjustment drive assembly (8) comprising a rectangular rod (81), the rectangular rod (81) being rotatable, the rectangular tube (73) being provided with a rectangular hole and cooperating with the rectangular rod (81), the rectangular tubes (73) in all the crossbar adjustment assemblies (7) being sleeved on the rectangular rod (81) and slidably cooperating with the rectangular rod (81); The crossbar fixing assembly (5) comprises two crossbar fixing units, the two crossbar fixing units comprising a crossbar fixing screw (51), two crossbar fixing plates (52) and a driving gear (53), the crossbar fixing screw (51) being provided with a bidirectional thread, the two crossbar fixing plates (52) being both threadedly connected to the crossbar fixing screw (51), and the driving gear (53) being able to drive the crossbar fixing screw (51) to rotate when rotating; The crossbar fixing unit further comprises a crossbar fixing frame (54), a driving bevel gear (55), a passive bevel gear (56) and a connecting shaft; the crossbar fixing screw (51) is rotatably connected to the crossbar fixing frame (54); the bottom of the crossbar fixing screw (51) passes through the crossbar fixing frame (54) and is fixedly mounted to the passive bevel gear (56); a connecting support plate is fixedly mounted on the crossbar fixing frame (54); the connecting shaft is rotatably connected to the connecting support plate; the driving bevel gear (55) is fixedly mounted on one end of the connecting shaft; the driving gear (53) is fixedly mounted on the other end of the connecting shaft; the driving bevel gear (55) and the passive bevel gear (56) are meshed; A crossbar fixing drive assembly (9) is provided on the welding table (3), the crossbar fixing drive assembly (9) comprising two driving spline shafts (91), a crossbar fixing motor (92) and a connecting belt member (93), the driving gears (53) in the two crossbar fixing units are meshed with the corresponding driving spline shafts (91), the crossbar fixing motor (92) is fixedly mounted on one of the driving spline shafts (91), the connecting belt member (93) comprises two connecting pulleys and a connecting belt, the two connecting pulleys are respectively fixedly mounted on the corresponding driving spline shafts (91), and the connecting belt is connected to the two connecting pulleys.

2. A laser welding device according to claim 1, characterized in that: The crossbar fixing assembly (5) further comprises a crossbar connecting plate (57), and the crossbar adjusting assembly (7) further comprises a moving plate (74), a transmission belt member (75), a fixing block (76) and a stabilizing plate (77). The crossbar connecting plate (57) is fixedly mounted on the crossbar fixing frame (54). In two adjacent crossbar connecting plates (57), the pushing screw (72) is rotatably connected to one of the crossbar connecting plates (57), and the pushing frame (71) is fixedly mounted on the other crossbar connecting plate (57). The moving plate (74) is fixedly mounted on the crossbar fixing frame (54), and the moving plate (74) is threadedly connected to the pushing screw ( The end of the pushing screw (72) is rotatably connected to the stabilizing plate (77), the cross bar fixing frame (54) passes through the stabilizing plate (77) and slidably cooperates with the stabilizing plate (77), the fixing block (76) is fixedly mounted on the corresponding cross bar connecting plate (57), the rectangular cylinder (73) is rotatably connected to the fixing block (76), the transmission belt member (75) comprises a transmission driving pulley, a transmission passive pulley and a transmission belt, the transmission driving pulley is fixedly mounted on the pushing screw (72), the transmission passive pulley is fixedly mounted on the rectangular cylinder (73), and the transmission belt is connected to the driving pulley and the passive pulley.

3. A laser welding device according to claim 2, characterized in that: The longitudinal rod fixing assembly (4) comprises two longitudinal rod fixing units, a longitudinal rod screw (41), a longitudinal rod fixing shell (42) and a longitudinal rod motor (43). The longitudinal rod fixing unit comprises a longitudinal rod fixing frame (44), a longitudinal rod fixing screw (45) and two longitudinal rod fixing plates (46). The longitudinal rod fixing screw (45) is provided with a bidirectional thread. The two longitudinal rod fixing plates (46) are both threadedly connected to the longitudinal rod fixing screw (45). The longitudinal rod fixing screw (45) is rotatably connected to the longitudinal rod fixing frame (44). The longitudinal rod fixing frame (44) is threadedly connected to the longitudinal rod screw (41). The longitudinal rod fixing frame (44) is slidably fitted in the longitudinal rod fixing shell (42). The longitudinal rod screw (41) is rotatably connected to the longitudinal rod fixing shell (42). The longitudinal rod motor (43) is fixedly mounted on the longitudinal rod fixing shell (42). The output end of the longitudinal rod motor (43) is fixedly mounted on the longitudinal rod screw (41).

4. A laser welding device according to claim 3, characterized in that: The longitudinal rod adjustment assembly (6) comprises a longitudinal rod adjustment screw (61), two longitudinal rod adjustment blocks (62) and a longitudinal rod adjustment motor (63); the longitudinal rod adjustment screw (61) is provided with a bidirectional thread; the longitudinal rod adjustment screw (61) is rotatably connected to the welding table (3); the longitudinal rod adjustment motor (63) is fixedly mounted on the welding table (3); an output end of the longitudinal rod adjustment motor (63) is fixedly mounted on the longitudinal rod adjustment screw (61); the two longitudinal rod adjustment blocks (62) are respectively fixedly mounted on the longitudinal rod fixing shell (42); and the longitudinal rod adjustment blocks (62) are threadedly connected to the longitudinal rod adjustment screw (61).

5. The laser welding device according to claim 1, characterized in that: The crossbar adjustment drive assembly (8) further comprises a crossbar adjustment motor (82), the crossbar adjustment motor (82) being fixedly mounted on the welding table (3), and the output end of the crossbar adjustment motor (82) being fixedly mounted on the rectangular rod (81).

6. A laser welding device according to claim 3, characterized in that: The crossbar fixing assembly (5) further comprises a crossbar limiting rod (58), the crossbar limiting rod (58) being fixedly mounted on the crossbar fixing frame (54), the crossbar limiting rod (58) penetrating the crossbar fixing plate (52) and slidably engaging with the crossbar fixing plate (52), the longitudinal bar fixing assembly (4) further comprises a longitudinal bar limiting rod (47), the longitudinal bar limiting rod (47) being fixedly mounted on the longitudinal bar fixing frame (44), the longitudinal bar limiting rod (47) penetrating the longitudinal bar fixing plate (46) and slidably engaging with the longitudinal bar fixing plate (46), a fixed slider (10) being fixedly mounted on the bottom of the crossbar connecting plate (57), a fixed slide rail (11) being fixedly mounted on the welding table (3), and the fixed slider (10) being slidably engaging with the fixed slide rail (11).

7. A method for welding a towel rack, characterized in that: The laser welding device according to any one of claims 1 to 6 is used.

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