A laser welding platform for sheet metal

Abstract

The application belongs to the field of laser welding equipment, and particularly relates to a laser welding platform for metal plates, which is aimed at the problem that the existing technology cannot adapt to different welding angles of different plates and welding pools are prone to problems, and provides a laser welding platform for metal plates, which comprises a platform main body, a support installed on the platform main body, a laser welding assembly capable of adjusting an angle installed at the upper end of the support, and a welding table matched with the welding assembly installed on the inner side of the support; the welding table is in a multi-prism structure, the plane of the edge of the welding table is used as a welding operation surface, and two welding pieces to be welded are placed on two welding operation surfaces with different angles to realize welding of the two welding pieces at different angles, so that the clamping requirements of different shapes of metal plates can be met without replacing a clamp, a heating unit is arranged between the two sets of welding tables to heat the welding pieces, welding stress is effectively reduced, internal gas is promoted to escape, and defects such as pores and cracks are avoided.

Description

Technical Field

[0001] This invention belongs to the field of laser welding equipment, and specifically relates to a laser welding platform for metal sheets. Background Technology

[0002] Metal sheet welding is widely used in hardware products, home decoration, industrial parts, and many other fields. The welding process directly affects the structural strength and appearance quality of the product. While ordinary welding processes have low requirements for workpiece assembly precision and high tolerance for weld gaps (even if there are misalignments or gaps in the workpiece, they can be compensated for with filler wire), making them highly adaptable, the heat source energy is dispersed, the heating range is wide, the workpiece is prone to significant thermal deformation, and it is susceptible to human operation and environmental factors, resulting in a high incidence of defects such as weld porosity, slag inclusions, and cracks. Currently, laser welding uses a high-energy-density laser beam as a heat source to locally melt the workpiece to form a weld joint. Laser welding is fast, with highly concentrated energy, heating only the weld area, resulting in minimal workpiece deformation and good weld quality. However, due to the small laser spot size, if the workpiece gap is too large or misaligned, especially when welding curved plates, weld non-fusion defects are prone to occur. Therefore, high precision requirements are placed on the tooling and fixtures.

[0003] Patent application number 202111091580.6 discloses a laser welding fixture platform. The adjustable speed and switchable rotation direction of the fixture can meet the requirements of different welding processes for welding speed and direction, thereby improving welding efficiency while ensuring welding quality. However, the existing technology cannot adapt to the requirements of different welding angles for different plates when clamping them. In addition, the weld pool cools down quickly during laser welding, and the gas in the weld pool cannot be released in time, which can easily lead to problems such as porosity. Summary of the Invention

[0004] The purpose of this invention is to overcome the problems existing in the prior art and to realize a laser welding platform for metal sheets.

[0005] To achieve the above-mentioned objectives, the technical solution of this invention is: a laser welding platform for metal sheets, comprising a platform body, a support mounted on the platform body, an adjustable laser welding assembly mounted on the upper end of the support, and a welding table cooperating with the welding assembly mounted on the inner side of the support; the welding table has a polygonal prism structure, with the plane of the edge of the welding table serving as the welding operation surface, and at least two sets of elastic telescopic arms rotatably connected to the middle of the end face of the welding table, with clamping seats hinged to the outer ends of the elastic telescopic arms respectively, the clamping seats being arranged parallel to the corresponding welding operation surfaces, and the welding parts being clamped by the cooperation of the clamping seats with the welding operation surfaces, placing the two welding parts to be welded on two welding operation surfaces at different angles to achieve welding of the two welding parts at different angles, and a heating unit for heating the welding parts being arranged between the two sets of welding tables.

[0006] Preferably, the elastic telescopic arm includes a mounting plate and a connecting plate that are slidably connected to each other. The mounting plate is rotatably connected to the middle of one end of the welding table, and the upper end of the connecting plate is hinged to the corresponding clamping seat. The surface of the mounting plate is provided with a mounting groove along its length. The lower end of the connecting plate is fixedly connected to a mounting slider, which is slidably connected to the mounting groove. The upper end of the mounting slider is fixedly connected to a clamping spring, and the upper end of the clamping spring is fixedly connected to the inner wall of the mounting groove.

[0007] Preferably, a connecting rod is provided on both sides between the two corresponding clamping seats. The clamping seat corresponding to the connecting rod has a cylindrical groove with an inner end opening. The outer end of the connecting rod is fixedly connected to a baffle, and the baffle slides in cooperation with the inside of the cylindrical groove.

[0008] Preferably, the two welding stations have mounting holes in the middle of their end faces, and sleeves are fixedly connected to each mounting hole on the same axis. A guide post is provided between the sleeves on the same axis. The two ends of the guide post are rotatably connected to the bracket. Spiral grooves with different spiral directions are provided on both sides of the surface of the guide post. Guide pins are fixedly connected to the inner walls of the sleeves, and the other ends of the guide pins engage with the corresponding spiral grooves.

[0009] Guide gears are fixedly connected to both ends of the guide column, and a brake pawl capable of elastic deformation is engaged on the lower side of the guide gear. The lower end of the brake pawl is fixedly connected to the bracket.

[0010] Preferably, the welding operation surface of the welding station is hinged with an adjustment plate that can swing to one side. The inner side of the adjustment plate is provided with a hinge rod and a swing arm that are hinged to each other. The other end of the hinge rod is hinged to the adjustment plate, and the other end of the swing arm is fixedly connected to a ratchet. The ratchet is rotatably connected to the welding station. A pawl is engaged on one side of the ratchet. The pawl is rotatably connected to the welding station. A spring support plate is provided on one side of the pawl. The spring support plate is fixedly connected to the welding station. The pawl is kept engaged with the ratchet by the elastic support force provided by the spring support plate. Under the engagement of the pawl and the ratchet, the adjustment plate can only swing upward in one direction.

[0011] Preferably, one end of the welding station is rotatably connected to a rotating ring on the same axis, and a control ring is fixedly connected to the surface of the rotating ring on the same axis; the circumferential surface of the rotating ring is fixedly connected to a buckle plate equal in number to the pawl, the lower end of the pawl is fixedly connected to a mating pin, the buckle plate is located on one side of the mating pin, and one end of the spring support plate abuts against the surface of the buckle plate.

[0012] Preferably, the upper surface of the adjustment plate is fixedly connected with a first magnetic block, and the end of the clamping seat facing the welding operation surface is fixedly connected with a second magnetic block that can attract the first magnetic block.

[0013] Preferably, the laser welding assembly includes a guide rail, an adjusting arm fixedly connected to both ends of the guide rail, and a support arm slidably connected along the length of the adjusting arm. The support arm is rotatably connected to the upper end of the bracket, and the upper end of the bracket is threaded with a fixing knob for fixing the support arm.

[0014] A movable seat is slidably connected to the surface of the guide rail along its length. An adjusting screw is threadedly connected to the middle of the movable seat along the length of the adjusting arm. A mounting base is rotatably connected to one end of the adjusting screw facing the welding table. A laser welding head is fixedly connected to the mounting base. An adjusting knob is fixedly connected to the other end of the adjusting screw. A telescopic rod is fixedly connected between the mounting base and the movable seat. Pullers are rotatably connected to both sides of the mounting base facing the welding table.

[0015] Preferably, a connecting slider is fixedly connected to the end of the adjusting arm away from the guide rail, and a connecting groove is formed on the surface of the support arm corresponding to the connecting slider. The connecting slider is slidably connected to the connecting groove, and a support spring is fixedly connected between the connecting slider and the connecting groove.

[0016] Preferably, the heating unit includes a base rotatably connected to the surface of the guide column. The outer side of the base is provided with mounting frames equal in number to the welding operation surfaces. Slide rods are fixedly connected to both sides of the inner side of each mounting frame. The slide rods are slidably connected to the base, and a matching spring is fixedly connected between the slide rods and the base. Multiple heat insulation cylinders are slidably connected to the surface of each mounting frame. A heating head is fixedly connected to the upper end of each heat insulation cylinder. An annular baffle is fixedly connected to the surface of the heat insulation cylinder located inside the mounting frame. A matching spring is sleeved on the surface of the heat insulation cylinder between the inner wall of the mounting frame and the annular baffle.

[0017] Compared with the prior art, the laser welding platform for metal sheets of the present invention has at least the following beneficial effects:

[0018] 1. This invention provides multiple welding operation surfaces through a multi-prism structure welding table. Combined with the elastic telescopic arm and clamping seat, it can stably clamp flat plates through planar contact, and can also accommodate curved plates by means of the first and second clamping inclined surfaces. It can meet the clamping needs of metal plates of different shapes without changing the clamps. At the same time, the transmission structure of the guide column and the spiral groove can precisely adjust the distance between the welding tables, and the elastic characteristics of the clamping spring are compatible with plates of different thicknesses, making it highly versatile.

[0019] 2. The adjustment plate on the welding table, together with the unidirectional positioning structure of ratchet and pawl, can achieve precise fine-tuning of the welding angle to meet the welding needs of different angles; the laser welding assembly can flexibly adjust the welding angle and welding distance by rotating the support arm and extending and retracting the adjusting screw. Combined with the guiding effect of high-precision guide rails and pulleys, it ensures accurate welding trajectory and is suitable for complex welding scenarios.

[0020] 3. The heating unit between the two welding stations preheats the welding area through the heating head, effectively reducing welding stress, promoting the escape of internal gas, and avoiding defects such as porosity and cracks; the concentrated energy of the laser welding head, combined with a stable clamping and positioning structure, makes the weld firm and uniform, significantly improving the welding quality. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the welding station structure of the present invention;

[0023] Figure 3 This is a first schematic diagram of the laser welding assembly structure of the present invention;

[0024] Figure 4 This is a second schematic diagram of the laser welding assembly structure of the present invention;

[0025] Figure 5 This is a schematic diagram of the support spring mounting structure of the present invention;

[0026] Figure 6 This is an exploded view of the sleeve and guide post mating structure of the present invention;

[0027] Figure 7 This is a first schematic diagram of the adjustment plate mounting structure of the present invention;

[0028] Figure 8 This is a second schematic diagram of the adjustment plate mounting structure of the present invention;

[0029] Figure 9 This is a schematic diagram of the pawl and elastic support plate mating structure of the present invention;

[0030] Figure 10 This is the invention Figure 9 A magnified view of the structure at point E in the diagram;

[0031] Figure 11 This is a schematic diagram of the heating unit installation structure of the present invention;

[0032] Figure 12 This is a schematic diagram of the linkage rod installation structure of the present invention;

[0033] Figure 13 This is a first schematic diagram of the heating head mounting structure of the present invention;

[0034] Figure 14 This is a second schematic diagram of the heating head mounting structure of the present invention.

[0035] In the diagram: 1-Platform body; 2-Bracket; 3-Support arm; 4-Adjusting arm; 5-Guide rail; 6-Control motor; 7-Fixing knob; 8-Moving seat; 9-Adjusting knob; 10-Adjusting screw; 11-Mounting seat; 12-Pulley; 13-Laser welding head; 14-Connecting slider; 15-Supporting spring; 16-Guide post; 17-Sleeve; 18-Guide pin; 19-Helical groove; 20-Guide gear; 21-Brake pawl; 22-Welding table; 23-Adjusting plate; 24-First magnetic block; 25-Hinge rod; 26-Swing arm; 27-Ratchet; 28-Pawl; 29-Spring support plate; 30-Matching pin; 31-Rotating ring; 32-Snap plate; 33-Control ring; 34-Clamping seat; 35-First clamping inclined surface; 36-Second clamping inclined surface; 37-Connecting plate; 38-Clamping spring; 39-Mounting plate; 40-Linking rod; 42-Baffle; 43-Second magnetic block; 44-Base; 45-Mounting frame; 46-Slide rod; 47-Matching spring; 48-Heat insulation cylinder; 50-Adaptive spring; 53-Support; 54-Connecting pin; 55-Telescopic rod; 56-Adjusting screw; 57-Heating head. Detailed Implementation

[0036] The laser welding platform for metal sheets of the present invention will be described in more detail below with reference to the accompanying drawings and specific embodiments.

[0037] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0038] This embodiment discloses a laser welding platform for metal sheets, such as... Figure 1-14 As shown, Figure 1-14As shown, the device includes a platform body 1, which serves as the load-bearing foundation for the entire device, providing a stable mounting reference surface for all components. Its bottom is designed with a thickened steel plate structure to ensure overall rigidity and load-bearing capacity. A bracket 2 is bolted to the platform body 1. The bracket 2 is welded from high-strength alloy profiles, possessing excellent deformation resistance. An adjustable laser welding assembly is installed at the upper end of the bracket 2, allowing for flexible switching of the welding direction via an angle adjustment mechanism. A welding table 22, which cooperates with the welding assembly, is installed inside the bracket 2. The welding table 22 and the bracket 2 are connected by a rotating structure, allowing for adjustment according to welding requirements. Relative Position; The welding table 22 has a polygonal prism structure, which provides multiple welding operation surfaces with different orientations. The planes of the edges of the welding table 22 serve as welding operation surfaces. Each operation surface is precision ground to ensure surface flatness to meet welding accuracy requirements. At least two sets of elastic telescopic arms are rotatably connected to the center of the end face of the welding table 22 via bearings. The bearings allow the elastic telescopic arms to rotate flexibly around the center of the welding table 22. The outer ends of the elastic telescopic arms are respectively hinged to clamping seats 34 via hinge shafts. The hinge structure allows the clamping seats 34 to self-adjust within a certain angle range. The clamping seats 34 are respectively connected to the corresponding welding operation surfaces. The working surfaces are arranged parallel to each other, and the parallel structure ensures a uniform distribution of clamping force. When the clamping seat 34 cooperates with the welding operating surface to clamp the weldment, the elastic force of the elastic telescopic arm forms a stable clamp. When the two weldments to be welded are placed on two welding operating surfaces at different angles, the angular characteristics of the polygonal prism welding table 22 are used to achieve welding of the two weldments at different angles, adapting to different welding scenario requirements. The welding operating surface is provided with a first clamping inclined surface 35 that is inclined inward, and the inner end of the clamping seat 34 is provided with a second clamping inclined surface 36 that is inclined upward. The cooperation of the first clamping inclined surface 35 and the second clamping inclined surface 36 forms a V-shape. The V-shaped clamping structure utilizes the guiding effect and clamping force of the inclined surface to effectively clamp plates with curved structures. At the same time, the inclined surface contact increases friction to prevent slippage. The planar structure of the clamping seat 34 and the welding operation surface can be adapted to plates with planar structures. Stable clamping is achieved through planar contact. Different shaped plates can be adapted without changing the clamps, making it widely applicable. A heating unit is provided between the two sets of welding tables 22 to heat the weldment. The heating unit can preheat the welding area before welding, reduce welding stress and extend the cooling time, allowing internal gases to escape fully, improving welding quality and avoiding porosity and bubbles in the weld pool.

[0039] The elastic telescopic arm includes a mounting plate 39 and a connecting plate 37 that are slidably connected to each other. The mounting plate 39 and the connecting plate 37 adopt a precision sliding fit structure to ensure smooth relative movement. The mounting plate 39 is rotatably connected to the middle of one end of the welding table 22 via a rotating shaft. The rotating shaft, the mounting plate 39, and the welding table 22 adopt a transition fit to balance rotational flexibility and connection stability. The upper end of the connecting plate 37 is hinged to the corresponding clamping seat 34 via a pin. The pins are provided with anti-detachment structures at both ends to prevent them from falling off. The surface of the mounting plate 39 has a mounting groove along its length, and the groove has a T-shaped cross-section. The lower end of the connecting plate 37 is fixedly connected to a mounting slider. The slider and the groove are adapted to each other. The mounting slider is slidably connected to the mounting groove. The T-shaped structure can prevent the slider from falling out of the groove and achieve stable sliding. The upper end of the mounting slider is fixedly connected to a clamping spring 38. The clamping spring 38 is a high-strength compression spring. The upper end of the clamping spring 38 is fixedly connected to the inner wall of the mounting groove. Under the push of the elastic restoring force of the clamping spring 38, the connecting plate 37 slides along the groove on the surface of the mounting plate 39 and drives the clamping seat 34 to move towards the welding table 22. Through the cooperation of the clamping seat 34 and the welding operation surface of the edge of the welding table 22, a reliable clamping of the welded parts is formed, and the elastic characteristics of the spring can be adapted to welded parts of different thicknesses.

[0040] A connecting rod 40 is provided on both sides between the two corresponding clamping seats 34. The connecting rod 40 adopts a rigid rod structure to ensure effective force transmission. The clamping seat 34 corresponding to the connecting rod 40 has a cylindrical groove with an inner opening. The inner diameter of the cylindrical groove is precisely matched with the outer diameter of the connecting rod 40. The outer ends of the connecting rod 40 are respectively fixedly connected to baffles 42. The diameter of the baffles 42 is larger than the opening size of the cylindrical groove. The baffles 42 slide in the cylindrical groove. When one clamping seat 34 moves, the force is transmitted through the connecting rod 40, which drives the other clamping seat 34 to move synchronously. Under the sliding cooperation between the connecting rod 40 and the cylindrical groove, the two corresponding clamping seats 34 can move synchronously, ensuring symmetrical distribution of clamping force on the plate and achieving stable clamping of the plate.

[0041] Each of the two welding stations 22 has a mounting hole in the middle of its end face. The axis of the mounting hole coincides with the central axis of the welding station 22. Sleeves 17, made of wear-resistant alloy material, are coaxially fixed inside the mounting holes via interference fit. A guide post 16 is positioned between the coaxially positioned sleeves 17. The surface of the guide post 16 is hardened to increase its hardness. Both ends of the guide post 16 are rotatably connected to the bracket 2 via bearings. The bearing seats are fixed to the bracket 2 to ensure installation accuracy. Spiral grooves 19 with different helical directions are formed on both sides of the surface of the guide post 16. The lead of the spiral grooves 19 is precisely calculated. Guide pins 18 are fixedly connected to the inner walls of the sleeves 17 by welding. The other end of the guide pins 18 meshes with the corresponding spiral grooves 19. When the distance between the two welding stations 22 is adjusted, the welding stations 22 move the sleeves 17. The guide pin 18 slides within the spiral groove 19, thereby driving the guide column 16 to rotate. Through the spiral transmission principle of the spiral groove 19, the axial movement of the sleeve 17 is converted into the rotation of the guide column 16. This allows for precise matching of the distance between the two welding stations 22 according to the width of the plate. When the guide column 16 rotates, it can drive the guide gear 20 to rotate. The two ends of the guide column 16 are respectively fixedly connected to the guide gear 20 by key connections. The key connections ensure the reliability of power transmission. The lower side of the guide gear 20 is engaged with a brake pawl 21 that can undergo elastic deformation. The brake pawl 21 is made of elastic material and has good elastic recovery ability. The lower end of the brake pawl 21 is fixedly connected to the bracket 2 by bolts. When the guide gear 20 rotates, the brake pawl 21 is always engaged with the gear under the elastic force. The friction between the gear and the brake pawl 21 is used to achieve braking and positioning, preventing the welding station 22 from shifting during the welding process.

[0042] The welding operating surface of the welding table 22 is hinged with adjusting plates 23 that can swing to one side. The hinges are damping hinges for easy positioning of the adjusting plates 23. The inner side of each adjusting plate 23 is provided with a hinge rod 25 and a swing arm 26 that are hinged to each other. The hinge rod 25 and the swing arm 26 are connected by a pin to achieve flexible rotation. The other end of the hinge rod 25 is hinged to the adjusting plate 23 via a hinge seat, which is fixed to the inner side of the adjusting plate 23. The other end of the swing arm 26 is fixedly connected to a ratchet 27 via a key, ensuring torque transmission. The ratchet 27 is rotatably connected to the welding table 22 via a bearing, ensuring smooth rotation of the ratchet 27. One side of each ratchet 27 is engaged with a pawl 28 made of wear-resistant steel, which is rotatably connected to the welding table 22 via a rotating shaft. The rotating shaft allows the pawl 28 to swing flexibly around it. A spring support plate 29 is provided on one side of the pawl 28. The spring support plate 29 is made of elastic metal sheet. The spring support plate 29 is fixedly connected to the welding table 22 by screws. The pawl 28 is kept engaged with the ratchet 27 by the elastic support force provided by the spring support plate 29. The elastic force of the spring support plate 29 keeps the pawl 28 in close contact with the tooth surface of the ratchet 27. Under the engagement of the pawl 28 and the ratchet 27, the unidirectional transmission characteristic of the ratchet 27 and pawl 28 is utilized to make the adjusting plate 23 swing upward in only one direction. When in use, the adjusting plate 23 is swung upward to a suitable position according to the required welding angle of the plate. The ratchet 27 and pawl 28 structure achieves positioning, thereby realizing the fine adjustment of the angle during plate welding to meet the welding requirements of different angles.

[0043] One end of the welding table 22 is rotatably connected to a rotating ring 31 via bearings. The bearings ensure the rotating ring 31 rotates flexibly. A control ring 33 is fixedly connected to the surface of the rotating ring 31 coaxially. The surface of the control ring 33 is provided with anti-slip texture for easy manual operation. The circumferential surface of the rotating ring 31 is fixedly connected with a number of buckles 32 equal to the number of pawls 28 via welding. The buckles 32 have an arc-shaped structure. The lower end of the pawls 28 is fixedly connected with a mating pin 30. The mating pin 30 and the pawl 28 are connected to each other. 8. Vertically arranged, the buckle plates 32 are respectively located on one side of the mating pin 30. One end of the spring support plate 29 abuts against the surface of the buckle plate 32. When the adjustment plate 23 needs to be reset, the control ring 33 is manually rotated, which drives the rotating ring 31 to rotate synchronously. The buckle plate 32 on the rotating ring 31 rotates accordingly. The buckle plate 32 pushes the mating pin 30, causing the pawl 28 to rotate around the rotating shaft. Then the pawl 28 disengages from the ratchet 27, releasing the positioning restriction. The adjustment plate 23 can be reset under its own weight or external force.

[0044] The upper surface of the adjustment plate 23 is fixedly connected with a first magnetic block 24, which is a permanent magnet. The end of the clamping seat 34 facing the welding operation surface is fixedly connected with a second magnetic block 43 that can attract the first magnetic block 24. The second magnetic block 43 is also a permanent magnet, but its polarity is opposite to that of the first magnetic block 24. Through the magnetic attraction between the first magnetic block 24 and the second magnetic block 43, a linkage relationship is formed between the clamping seat 34 and the adjustment plate 23. When the two welding tables 22 move to adjust the distance, the magnetic attraction force drives the clamping seat 34 to move synchronously, realizing the synchronous adjustment of the distance and position of the clamping seat 34 and the welding table 22, ensuring that the clamping position is always adapted to the welding operation surface.

[0045] The laser welding assembly includes a guide rail 5, adjusting arms 4 fixedly connected to both ends of the guide rail 5, and a support arm 3 slidably connected along the length of the adjusting arms 4. The guide rail 5 is a high-precision linear guide rail 5 to ensure movement accuracy. The support arm 3 is rotatably connected to the upper end of the bracket 2 via a rotating shaft. The rotating shaft is equipped with a positioning structure. The upper end of the bracket 2 is threaded with a fixing knob 7 for fixing the support arm 3. The fixing knob 7 adopts a wing nut structure for easy manual operation. When the support arm 3 is rotated, the support arm 3 drives the adjusting arms 4 to swing synchronously around the rotating shaft, thereby changing the position of the guide rail 5. When adjusted to a suitable angle, the fixing knob 7 is rotated. Under the action of the fixing knob 7 being threadedly connected to the bracket 2, the end of the fixing knob 7 presses against the support arm 3, strengthening the clamping effect on the support arm 3, thereby fixing the support arm 3 and preventing angle deviation during the welding process.

[0046] A movable seat 8 is slidably connected to the surface of the guide rail 5 along its length via a slider. The slider cooperates with the guide rail 5 to ensure smooth movement. An adjusting screw 10, which is threaded along the length of the adjusting arm 4, is threaded to the middle of the movable seat 8. The adjusting screw 10 has a trapezoidal thread and a self-locking function. The end of the adjusting screw 10 facing the welding table 22 is rotatably connected to a mounting base 11 via a bearing. The bearing prevents the mounting base 11 from rotating when the adjusting screw 10 rotates. A laser welding head 13, which is a high-precision welding head, is fixedly connected to the mounting base 11 by bolts. To ensure welding quality, an adjustment knob 9 is fixedly connected to the other end of the adjustment screw 10. The surface of the adjustment knob 9 is provided with anti-slip texture for easy manual adjustment. A telescopic rod 55 is fixedly connected between the mounting base 11 and the movable base 8. The telescopic rod 55 adopts a multi-section telescopic structure, which plays a guiding and supporting role and prevents the mounting base 11 from shifting. On both sides of the end of the mounting base 11 facing the welding table 22, pulleys 12 are rotatably connected to each other through bearings. The pulleys 12 can make slight contact with the surface of the welded part during the welding process, which plays an auxiliary positioning and guiding role and ensures the accuracy of the welding head movement trajectory.

[0047] The adjusting arm 4 is fixedly connected to a connecting slider 14 at the end away from the guide rail 5. The connecting slider 14 is made of wear-resistant material. The surface of the support arm 3 corresponding to the connecting slider 14 is provided with a connecting groove. The inner wall of the groove is precision machined. The connecting slider 14 is slidably connected to the connecting groove to form a stable sliding fit. A support spring 15 is fixedly connected between the connecting slider 14 and the connecting groove. The support spring 15 is a compression spring, which can provide elastic support force for the adjusting arm 4. When the laser welding assembly is adjusted in angle or position, the elastic action of the spring buffers the impact force and assists the adjusting arm 4 in resetting, ensuring structural stability.

[0048] The heating unit includes a base 44 rotatably connected to the surface of the guide post 16 via bearings. The bearings allow the base 44 to rotate with the guide post 16 or remain relatively stationary. The outer side of the base 44 is provided with mounting frames 45, the number of which is equal to the number of welding operation surfaces. The mounting frames 45 adopt a frame structure to ensure installation space for the heating head 57. Slide rods 46 are fixedly connected to the inner sides of the mounting frames 45. The slide rods 46 adopt a smooth shaft structure and are slidably connected to the base 44 via sliding sleeves made of wear-resistant material to ensure smooth sliding. A cooperating spring 47 is fixedly connected between the slide rods 46 and the base 44, providing elastic support for the mounting frames 45. The mounting frame 45 is capable of adaptively adjusting its position. Multiple heat insulation cylinders 48 are slidably connected to the surface of the mounting frame 45 via sliding seats. The heat insulation cylinders 48 are made of high-temperature resistant heat insulation material, which reduces heat loss. Heating heads 57 are fixedly connected to the upper ends of the heat insulation cylinders 48. The heating heads 57 use resistance heating or induction heating, enabling rapid temperature rise and precise temperature control. An annular baffle is fixedly connected to the surface of the heat insulation cylinder 48 located inside the mounting frame 45, used to limit the fit spring 50. A fit spring 50 is sleeved on the surface of the heat insulation cylinder 48 between the inner wall of the mounting frame 45 and the annular baffle. The fit spring 50 can push the heat insulation cylinder 48, ensuring that the heating head 57 remains close to the surface of the welded part, guaranteeing a uniform and stable heating effect.

[0049] When using this device, the key parameters of the metal sheet to be welded are clearly defined, including shape, thickness, welding angle and width requirements. This determines the selection of the welding operation surface, clamping method and subsequent parameter adjustment benchmark, ensuring that the process is adapted to the specific requirements.

[0050] Before welding, the spacing of the welding table 22 is adjusted according to the size of the plate. When the welding table 22 moves, the guide pin 18 and the spiral groove 19 drive the guide column 16 to rotate. The guide gears 20 at both ends of the guide column 16 mesh with the elastic brake pawl 21, and the welding table 22 is locked in position by friction to prevent displacement during welding. At the same time, the first magnetic block 24 on the adjustment plate 23 is attracted to the second magnetic block 43 of the clamping seat 34, so that the clamping seat 34 and the adjustment plate 23 are synchronously matched without the need for separate calibration.

[0051] After the spacing is adjusted, the plate is placed between the clamping seat 34 and the welding operation surface. Flat plates are clamped by the clamping seat 34 against the plane of the operation surface, while curved plates are fixed by the guide and clamping force of the V-shaped clamping slope. The elastic characteristics of the clamping spring 38 are compatible with plates of different thicknesses, ensuring stable clamping without slippage and eliminating the need to replace the clamps. The clamping spring 38 of the elastic telescopic arm releases elastic force, pushing the connecting plate 37 to slide along the length of the mounting plate 39, causing the clamping seat 34 to move closer to the welding operation surface. The linkage rod 40 slides with the cylindrical groove of the clamping seat 34 through the baffle 42, realizing the synchronous movement of the clamping seats 34 on both sides and ensuring symmetrical clamping force.

[0052] Before welding, the welding angle can be precisely adjusted according to the welding requirements of the plate. The adjusting plate 23 is swung upward according to the welding requirements, and the swing arm 26 and ratchet 27 are rotated through the hinge rod 25. The pawl 28 is engaged with the ratchet 27 under the elastic force of the spring support plate 29. The unidirectional transmission characteristic is used to position the adjusting plate 23 and precisely adjust the welding angle of the plate. If it needs to be reset, the rotating control ring 33 drives the rotating ring 31 and the buckle plate 32, pushes the mating pin 30 to disengage the pawl 28 from the ratchet 27, and the adjusting plate 23 is reset under the action of gravity or external force.

[0053] After the metal sheet is fixed in position, loosen the fixing knob 7, rotate the support arm 3 to drive the adjusting arm 4 and the guide rail 5 to adjust the welding angle, and tighten the fixing knob 7 to lock it in place; rotate the adjusting knob 9 to drive the adjusting screw 10 to rotate, and move axially under the action of the threaded connection, and slide along the guide rail 5 with the moving seat 8 to adjust the distance between the laser welding head 13 and the welding surface; the telescopic rod 55 ensures that the mounting seat 11 moves smoothly, and the pulleys 12 on both sides assist in positioning the welding trajectory and improve the movement accuracy. Then, the mounting frame 45 of the heating unit can adaptively adjust its position under the action of the spring 47, and the heating head 57 on the heat insulation cylinder 48 is pushed tightly against the welding area of ​​the sheet under the push of the matching spring 50; start the heating head 57, and preheat by resistance or induction heating to reduce welding stress, promote the escape of internal gas, and avoid defects such as pores and bubbles after welding.

[0054] During welding, the laser welding head 13 is activated and moves at a constant speed along the high-precision guide rail 5. The pulley 12 is in contact with the surface of the plate to assist in guiding and ensure the welding trajectory is accurate. The laser energy is concentrated on the welding interface, causing the metal plate to melt and fuse. With the help of the angle adaptation between the multi-prism welding table 22 and the adjustment plate 23, welding operations of plates with different angles and shapes can be completed.

[0055] After welding is completed, turn off the laser welding head 13 and the heating unit, manually pull the clamping seat 34 to compress the clamping spring 38, and release the workpiece clamping; loosen the brake pawl 21, adjust the distance of the welding table 22, and take out the finished product; finally, rotate the control ring 33 to reset the adjusting plate 23, and the clamping seat 34 returns to the initial position under the action of magnetic attraction and spring, preparing for the next welding.

[0056] It should be noted that, in actual implementation, the structure depicted in the accompanying drawings is not a fixed or unchanging embodiment. The components of the embodiments of the invention described and shown in these drawings can typically be arranged and designed in various different configurations. Furthermore, the accompanying drawings and abstract drawings are merely illustrative and do not represent the specific structure or actual quantity in a concrete implementation.

[0057] Unless otherwise defined, the technical or scientific terms used herein should be understood in their ordinary sense as would be understood by one of ordinary skill in the art to which this invention pertains. The use of terms such as "a" or "an" in this specification and claims does not necessarily indicate a limitation of quantity. Terms such as "comprising" or "including" mean that the element or component preceding the word encompasses the element or component listed following the word and its equivalents, without excluding other elements or components. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0058] The exemplary embodiments of the present invention have been described in detail above with reference to preferred embodiments. However, those skilled in the art will understand that various modifications and alterations can be made to the above specific embodiments without departing from the concept of the present invention, and various combinations can be made to the various technical features and structures proposed in the present invention without exceeding the protection scope of the present invention.

Claims

1. A laser welding platform for metal sheets, comprising a platform body (1), characterized in that: A bracket (2) is installed on the platform body (1). An adjustable laser welding assembly is installed on the upper end of the bracket (2). A welding table (22) that cooperates with the welding assembly is installed on the inner side of the bracket (2). The welding table (22) has a polygonal prism structure. The plane of the edge of the welding table (22) serves as the welding operation surface. At least two sets of elastic telescopic arms are rotatably connected to the middle of the end face of the welding table (22). The outer ends of the elastic telescopic arms are respectively hinged with clamping seats (34). The clamping seats (34) are respectively arranged parallel to the corresponding welding operation surfaces. The welding parts are clamped by the clamping seats (34) cooperating with the welding operation surfaces. The two welding parts to be welded are placed on two welding operation surfaces at different angles to achieve welding of the two welding parts at different angles. A heating unit for heating the welding parts is provided between the two sets of welding tables (22).

2. The laser welding platform for metal sheets according to claim 1, characterized in that: The elastic telescopic arm includes a mounting plate (39) and a connecting plate (37) that are slidably connected to each other. The mounting plate (39) is rotatably connected to the middle of one end of the welding table (22). The upper end of the connecting plate (37) is hinged to the corresponding clamping seat (34). The surface of the mounting plate (39) is provided with a mounting groove along the length direction. The lower end of the connecting plate (37) is fixedly connected to a mounting slider. The mounting slider is slidably connected to the mounting groove. The upper end of the mounting slider is fixedly connected to a clamping spring (38). The upper end of the clamping spring (38) is fixedly connected to the inner wall of the mounting groove.

3. The laser welding platform for metal sheets according to claim 1, characterized in that: A connecting rod (40) is provided on both sides between two corresponding clamping seats (34). The clamping seat (34) corresponding to the connecting rod (40) has a cylindrical groove with an inner end opening. The outer end of the connecting rod (40) is fixedly connected to a baffle (42), and the baffle (42) slides in cooperation with the inside of the cylindrical groove.

4. The laser welding platform for metal sheets according to claim 1, characterized in that: The two welding stations (22) have mounting holes in the middle of their end faces. Sleeves (17) are fixedly connected to the inside of the mounting holes on the same axis. A guide post (16) is provided between the sleeves (17) on the same axis. The two ends of the guide post (16) are rotatably connected to the bracket (2). Spiral grooves (19) with different spiral directions are provided on both sides of the surface of the guide post (16). Guide pins (18) are fixedly connected to the inner walls of the sleeves (17). The other end of the guide pins (18) meshes with the corresponding spiral grooves (19). The guide post (16) is fixedly connected to both ends of a guide gear (20), and the lower side of the guide gear (20) is engaged with a brake pawl (21) capable of elastic deformation. The lower end of the brake pawl (21) is fixedly connected to the bracket (2).

5. The laser welding platform for metal sheets according to claim 1, characterized in that: The welding operation surface of the welding table (22) is hinged with an adjustment plate (23) that can swing to one side. The inner side of the adjustment plate (23) is provided with a hinge rod (25) and a swing arm (26) that are hinged to each other. The other end of the hinge rod (25) is hinged to the adjustment plate (23), and the other end of the swing arm (26) is fixedly connected to a ratchet (27). The ratchet (27) is rotatably connected to the welding table (22), and a pawl is engaged on one side of the ratchet (27). (28) The pawl (28) is rotatably connected to the welding table (22). A spring support plate (29) is provided on one side of the pawl (28). The spring support plate (29) is fixedly connected to the welding table (22). The pawl (28) is engaged with the ratchet (27) by the elastic support force provided by the spring support plate (29). Under the engagement of the pawl (28) and the ratchet (27), the adjusting plate (23) can only swing upward in one direction.

6. The laser welding platform for metal sheets according to claim 5, characterized in that: One end of the welding table (22) is rotatably connected to a rotating ring (31) on the same axis. A control ring (33) is fixedly connected to the surface of the rotating ring (31) on the same axis. The circumferential surface of the rotating ring (31) is fixedly connected to a buckle plate (32) equal in number to the pawl (28). The lower end of the pawl (28) is fixedly connected to a mating pin (30). The buckle plate (32) is located on one side of the mating pin (30). One end of the spring support plate (29) presses against the surface of the buckle plate (32).

7. The laser welding platform for metal sheets according to claim 5, characterized in that: The upper surface of the adjustment plate (23) is fixedly connected with a first magnetic block (24), and the end of the clamping seat (34) facing the welding operation surface is fixedly connected with a second magnetic block (43) that can attract the first magnetic block (24).

8. The laser welding platform for metal sheets according to claim 1, characterized in that: The laser welding assembly includes a guide rail (5), an adjusting arm (4) fixedly connected to both ends of the guide rail (5), and a support arm (3) slidably connected along the length of the adjusting arm (4). The support arm (3) is rotatably connected to the upper end of the bracket (2), and the upper end of the bracket (2) is threaded with a fixing knob (7) for fixing the support arm (3). The guide rail (5) is slidably connected to a movable seat (8) along its length. The movable seat (8) is threadedly connected to an adjusting screw (10) along the length of the adjusting arm (4). One end of the adjusting screw (10) facing the welding table (22) is rotatably connected to a mounting base (11). A laser welding head (13) is fixedly connected to the mounting base (11). An adjusting knob (9) is fixedly connected to the other end of the adjusting screw (10). A telescopic rod (55) is fixedly connected between the mounting base (11) and the movable seat (8). Pulleys (12) are rotatably connected to both sides of the end of the mounting base (11) facing the welding table (22).

9. The laser welding platform for metal sheets according to claim 8, characterized in that: The adjusting arm (4) is fixedly connected to a connecting slider (14) at one end away from the guide rail (5). The support arm (3) corresponding to the connecting slider (14) has a connecting groove on its surface. The connecting slider (14) is slidably connected to the connecting groove. A support spring (15) is fixedly connected between the connecting slider (14) and the connecting groove.

10. The laser welding platform for metal sheets according to claim 1, characterized in that: The heating unit includes a base (44) rotatably connected to the surface of the guide column (16). The outer side of the base (44) is provided with mounting frames (45) equal in number to the welding operation surface. The inner sides of the mounting frames (45) are fixedly connected with sliding rods (46). The sliding rods (46) are slidably connected to the base (44). A matching spring (47) is fixedly connected between the sliding rods (46) and the base (44). Multiple heat insulation cylinders (48) are slidably connected to the surface of the mounting frames (45). A heating head (57) is fixedly connected to the upper end of each heat insulation cylinder (48). An annular baffle is fixedly connected to the surface of the heat insulation cylinder (48) located inside the mounting frames (45). A matching spring (50) is sleeved on the surface of the heat insulation cylinder (48) between the inner wall of the mounting frames (45) and the annular baffle.

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