Laser welding machine for steel structural parts

Abstract

The invention relates to the field of welding equipment, in particular to a steel structural part laser welding machine which comprises a rack sliding on a rail, a welding gun fixedly installed in the rack, a welding slag shoveling mechanism arranged in the rack and used for shaping a welding seam, and a stabilizing mechanism used for pressing and protecting a workpiece. By adopting the linkage design of the scraper knife and the pendulum bob, when the scraper knife moves to a hard welding slag adhesion area or a spot welding area, the linkage assembly drives the pendulum bob to accumulate force and hammer the scraper knife to form instantaneous impact force, so that the scraper knife can easily shovel the welding slag, the welding seam shaping effect is uniform, and the welding quality is improved. The stabilizing mechanism is adopted to drive the abutting plate to press the surface of the workpiece through the lifting assembly, so that the abutting plate is matched with the workpiece bearing device to apply clamping force to the workpiece, the stability of the workpiece is improved, and the stability of the workpiece is prevented from being affected by vibration generated when a scraper knife shovels welding slag.

Description

Technical Field

[0001] The present invention relates to the field of welding equipment, and specifically to a laser welding machine for steel structure parts. Background Art

[0002] Due to the characteristics of high strength, light weight and modular design, steel structure parts are widely used in the fields of architecture, bridges, machinery manufacturing, etc. Among them, the H-shaped structure parts, as typical load-bearing members, are welded by horizontally arranged flanges and vertically arranged webs, and the weld quality directly affects the mechanical properties of the overall structure.

[0003] In traditional welding processes, laser welding technology has gradually become the main welding method for H-shaped structure parts due to advantages such as a small heat-affected zone and good weld formation. However, during the laser welding process, the residual of welding slag and the control of the stability of the workpiece are still technical difficulties. Especially under complex working conditions, it is easy to cause a decline in the surface quality and accuracy of the weld.

[0004] Existing laser welding machines usually include a frame that slides along a track and a welding torch fixed inside the frame. The welding torch realizes weld fusion through a laser beam. To improve efficiency, the conventional process adopts a step-by-step operation mode of first spot welding to preliminarily fix the flange and the web, and then laser welding to form.

[0005] Meanwhile, during the welding process, the frame can also preliminarily clean and shape the welding slag on the weld surface through a scraping knife arranged thereon to reduce subsequent processing procedures. However, existing laser welding machines have significant defects in the slag scraping link: when the scraping knife moves to the spot welding position or the area where the welding slag adheres firmly, the scraping knife is prone to skew or shake due to a sudden change in resistance, resulting in uneven shaping effect of the weld. In addition, the existing equipment has insufficient protection for the workpiece, and the vibration generated when the scraping knife shakes is directly transmitted to the workpiece, causing the welding position to shift and affecting the final assembly accuracy. Summary of the Invention

[0006] To solve the above technical problems, the technical solution adopted by the present invention is: a laser welding machine for steel structure parts, including a frame that slides on a track, a welding torch fixedly installed inside the frame, a welding slag scraping mechanism for shaping the weld inside the frame, and a stability mechanism for pressing and protecting the workpiece.

[0007] The welding slag scraping mechanism includes a scraping knife that slides left and right on the left side inside the frame for scraping off the excess welding slag on the weld, and a pendulum hammer hinged on the frame. When the scraping knife moves to a position where the welding slag is harder, a linkage component arranged on the frame can drive the pendulum hammer to swing and store energy, and then the pendulum hammer strikes the scraping knife to facilitate scraping off the harder welding slag.

[0008] The stabilizing mechanism includes two pusher members symmetrically arranged front and back inside the frame through a lifting assembly. A abutting plate for abutting against the workpiece is slidably arranged left and right on the lower side of the pusher member. The lifting assembly presses the abutting plate against the workpiece through the pusher member, avoiding vibration of the workpiece when the chisel removes the welding slag. The stabilizing mechanism further includes a cancelling assembly for further stabilizing the workpiece.

[0009] Preferably, the linkage assembly includes a driven swing plate rotatably arranged on the frame. The driven swing plate is located on the right side of the pendulum. Belt pulleys are arranged on the front sides of both the driven swing plate and the pendulum. A synchronous belt is wound around the outside of the two belt pulleys. The driven swing plate is fixedly connected to the belt pulley thereon, and the pendulum is rotatably connected to the belt pulley thereon.

[0010] Preferably, a synchronous ring is fixedly installed on the front side of the belt pulley at the pendulum. The synchronous ring is rotatably sleeved outside the rotating shaft of the pendulum. A locking square rod is slidably arranged along the radial direction of the synchronous ring. A slot for inserting the locking square rod is opened on the rotating shaft of the pendulum.

[0011] Preferably, a linkage bracket is fixedly installed on the rotating shaft of the pendulum. The linkage bracket is slidably connected to the locking square rod. A pushing spring is arranged between the linkage bracket and the locking square rod. A guiding plate with an arc-shaped front part is fixedly installed on the frame. A linkage pillar that moves along the outside of the arc-shaped structure of the guiding plate is fixedly installed on the rear side of the locking square rod.

[0012] Preferably, a guide groove member in an inverted V shape is fixedly installed on the left side of the chisel through a support plate. Two groups of arc-shaped grooves are symmetrically opened front and back on the guide groove member. Each group consists of two arc-shaped grooves arranged vertically. Side chisels for shoveling the side of the workpiece are slidably arranged along the tracks of each group of arc-shaped grooves.

[0013] Preferably, the lower side of the side chisel is flush with the lower side of the chisel. The two side chisels are symmetrically arranged and in a V shape. At the same time, the sides of the two side chisels in contact with the workpiece are perpendicularly arranged. When the side chisel moves along the corresponding arc-shaped groove, the side chisel rotates around the side line in contact with the side of the workpiece.

[0014] Preferably, a linkage frame plate is fixedly installed on the left side of the chisel. Two moving gears symmetrically arranged front and back are rotatably arranged on the linkage frame plate. Two fixed racks meshing with the two moving gears respectively are fixedly installed on the frame. The eccentric position of the moving gear is hinged to the side chisel at the corresponding position through a connecting plate.

[0015] Preferably, the lifting assembly includes a mounting plate fixedly installed on the frame. The pusher member is slidably connected to the mounting plate in a direction perpendicular to the side of the workpiece. A hydraulic cylinder is fixedly installed on the mounting plate. The lower end of the telescopic section of the hydraulic cylinder is fixedly installed with a push-pull plate. Two horizontally linear grooves symmetrically arranged front and back are opened on the push-pull plate. The upper side of the pusher member slides inside the corresponding horizontally linear groove through a raised column.

[0016] Preferably, the cancellation assembly includes a linkage frame slidably disposed on the outside of the pusher along the length direction of the pusher. A pusher plate is slidably disposed left and right on the outside of the linkage frame. The pusher plate is hinged to the abutting plate through a plurality of parallel hinge plates.

[0017] Preferably, the cancellation assembly further includes a damping telescopic rod fixedly connected to the right side surface of the shovel. A trapezoidal plate is slidably disposed up and down inside the frame through a guide post. The inclined surface on the trapezoidal plate is arranged in parallel with the pusher plate at the corresponding position. A locking structure is provided on the pusher plate to lock the pusher plate and the linkage frame together when the pusher plate is pressed by the inclined surface of the trapezoidal plate. The damping telescopic rod is connected and driven to the trapezoidal plate through a gear-rack reversing transmission structure.

[0018] The beneficial effects of the present invention are as follows: First, the present invention adopts the linkage design of the shovel and the pendulum. When the shovel moves to the area where the welding slag adheres firmly or the spot welding area, the linkage assembly drives the pendulum to store energy and hammer the shovel, forming an instantaneous impact force, so that the shovel can easily remove the welding slag and ensure the uniform shaping effect of the weld seam.

[0019] Second, the present invention adopts a stabilizing mechanism to drive the abutting plate to press against the surface of the workpiece through a lifting assembly, so that the abutting plate cooperates with the workpiece supporting device to apply a clamping force to the workpiece, increasing the stability of the workpiece and preventing the vibration of the shovel when shoveling the welding slag from affecting the stability of the workpiece. In addition, the shovel can also cooperate with the abutting plate to offset the influence on the workpiece caused by the pendulum hitting the shovel in the reverse pushing direction, further strengthening the stability, ensuring the accuracy of the welding position and reducing errors.

[0020] Third, the present invention adopts two side shovel plates arranged in a V shape to supplement the shoveling area of the shovel. When the side shovel plates abut against the side surface of the workpiece, it can avoid the welding slag that is far from the weld seam and relatively high being missed by the shovel, thus further ensuring the shaping effect of the weld seam. And the side shovel plates are matched with the shovel through a linkage frame plate, so that when the side shovel plates encounter relatively firm welding slag, the pendulum can also quickly remove the firm welding slag by hitting the side shovel plates.

[0021] Fourth, the present invention adopts the design that the side shovel plates slide on the arc grooves of the guide groove members, and is matched with the structure that the moving gear drives the side shovel plates to slide through the connecting plate, so that when the side shovel plates encounter relatively firm welding slag and the pendulum stores energy, the shoveling force direction on the welding slag can be changed reciprocally by reciprocally swinging the side shovel plates, so as to remove the welding slag as much as possible before the pendulum hits the side shovel plates, reducing the number of times of the pendulum impact, further ensuring the stability of the workpiece, and thus further ensuring the accuracy of the welding position. Description of the Drawings

[0022] The present invention will be further described below with reference to the drawings and embodiments.

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0024] Figure 2 It is a schematic diagram of the partial structure of the present invention.

[0025] Figure 3 It is a schematic diagram of the partial structure of the frame and the slag shoveling and welding slag mechanism in the present invention.

[0026] Figure 4 It is a partial cross-sectional view of part of the frame, pendulum hammer, belt pulley and synchronous ring in the present invention.

[0027] Figure 5 It is a cross-sectional view of part of the frame, slag shovel, guide groove member and side slag shovel in the present invention.

[0028] Figure 6 It is a cross-sectional view of part of the frame, stabilizing mechanism and slag shovel in the present invention.

[0029] Figure 7 It is a schematic diagram of the mounting plate, hydraulic cylinder, pushing member and abutting plate in the present invention.

[0030] Figure 8 It is a schematic diagram of the pushing member, abutting plate, linkage frame and pushing plate in the present invention.

[0031] Figure 9 It is a partial cross-sectional view of the linkage frame, pushing plate and trapezoidal plate in the present invention.

[0032] In the figure: 1, frame; 2, welding torch; 3, slag shoveling and welding slag mechanism; 4, stabilizing mechanism; 11, reversing gear; 12, moving rack one; 13, moving rack two; 31, slag shovel; 32, pendulum hammer; 33, linkage assembly; 34, guide groove member; 35, side slag shovel; 41, lifting assembly; 42, pushing member; 43, abutting plate; 44, canceling assembly; 331, driven swing plate; 332, belt pulley; 333, synchronous ring; 334, inserting lock square rod; 335, linkage support; 336, guide plate; 351, linkage frame plate; 352, moving gear; 353, fixed rack; 354, connecting plate; 411, mounting plate; 412, hydraulic cylinder; 413, push-pull plate; 441, linkage frame; 442, pushing plate; 443, hinge plate; 444, damping telescopic rod; 445, trapezoidal plate; 446, L-shaped locking member; 447, transmission plate member. Detailed Embodiment

[0033] The embodiments of the present invention will be described in detail below. The embodiments described below are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention. For those not specified in the embodiments, the techniques or conditions described in the literature in the field or according to the product description are followed.

[0034] See also Figure 1 and Figure 2 A laser welding machine for steel structures includes a frame 1 sliding on a track, a welding gun 2 fixedly installed inside the frame 1, a welding slag scraping mechanism 3 for shaping the weld seam, and a stabilizing mechanism 4 for pressing and protecting the workpiece.

[0035] When it is necessary to weld the flange and web of an H-shaped steel structure, the operator first places the steel structure that is initially fixed together after spot welding on a flip platform using a handling device, and then rotates the steel structure forty-five degrees using the flip platform, so that the weld between the flange and the web of the steel structure corresponds to the lower part of the welding gun 2, and the side surfaces on both sides of the weld of the steel structure are symmetrically arranged relative to the welding gun 2.

[0036] Then, the moving frame 1 drives the welding gun 2 to weld the weld of the steel structure. At the same time, the frame 1 removes the excess welding slag on the weld through the welding slag scraping mechanism 3, so as to shape the weld. At the same time, the stabilizing mechanism 4 presses the workpiece to prevent the vibration when scraping the fixed welding slag from affecting the quality of welding.

[0037] See also Figure 1 , Figure 2 and Figure 3 The slag scraping mechanism 3 includes a scraper 31 which is slidably arranged on the left side of the frame 1 inside and used to scrape away excess slag on the weld, and a pendulum 32 hinged on the frame 1. When the scraper 31 moves to a position where the slag is harder, the linkage assembly 33 arranged on the frame 1 can drive the pendulum 32 to swing and accumulate force, and then the pendulum 32 hammers on the scraper 31 to facilitate scraping away the harder slag.

[0038] See also Figure 3 and Figure 5 An inverted V-shaped guide groove member 34 is fixedly installed on the left side of the scraper 31 through a support plate. Two groups of arc grooves are symmetrically opened on the guide groove member 34. Each group consists of two arc grooves arranged up and down. A side scraper plate 35 for scraping the side of the workpiece is slidably arranged along its trajectory on each group of arc grooves.

[0039] Continue reading Figure 3 and Figure 5 The lower side of the side shovel plate 35 is flush with the lower side of the scraper 31, and the two side shovel plates 35 are symmetrically arranged and V-shaped. At the same time, the two sides of the side shovel plates 35 that contact the workpiece are arranged perpendicular to each other. When the side shovel plates 35 move along the corresponding arc groove, the side shovel plates 35 rotate around the edge line that contacts the side of the workpiece as the axis.

[0040] After the workpiece is placed on the flipping platform, the moving rack 1 drives the welding torch 2 to the position corresponding to the weld seam, and at the same time makes the front and rear edges on the lower side of the scraping knife 31 respectively fit on the side surface of the workpiece, so as to facilitate the scraping knife 31 to scrape off the welding slag on the weld seam that is higher than its lower side surface, and then shape the weld seam. In the initial state, as Figure 5 shown, the two side scraping plates 35 are arranged perpendicular to each other, and the side scraping plates 35 are parallel to the side surface of the workpiece.

[0041] When the front and rear edges on the lower side of the scraping knife 31 respectively fit on the side surface of the workpiece, the sides of the two side scraping plates 35 away from each other fit on the side surface of the workpiece, so that the side scraping plates 35 can scrape off the welding slag located above the lower side surface of the scraping knife 31 and at the same time in front of or behind the scraping knife 31, thus avoiding omission.

[0042] Refer to Figure 2 、 Figure 3 and Figure 4 , the linkage assembly 33 includes a driven swing plate 331 rotatably arranged on the rack 1. The driven swing plate 331 is located on the right side of the pendulum 32. Belt pulleys 332 are arranged on the front sides of both the driven swing plate 331 and the pendulum 32. A synchronous belt is wound around the outside of the two belt pulleys 332. The driven swing plate 331 is fixedly connected to the belt pulley 332 thereon, and the pendulum 32 is rotatably connected to the belt pulley 332 thereon.

[0043] Refer to Figure 4 , a synchronous ring 333 is fixedly installed on the front side of the belt pulley 332 at the pendulum 32. The synchronous ring 333 is rotatably sleeved on the outside of the rotating shaft of the pendulum 32. A latch square rod 334 is slidably arranged along the radial direction of the synchronous ring 333. A slot for inserting the latch square rod 334 is opened on the rotating shaft of the pendulum 32.

[0044] Continue to refer to Figure 4 , a linkage support 335 is fixedly installed on the rotating shaft of the pendulum 32. The linkage support 335 is slidably connected to the latch square rod 334. A pushing spring is arranged between the linkage support 335 and the latch square rod 334. A guide plate 336 with an arc-shaped front part is fixedly installed on the rack 1. A linkage pillar that moves along the outside of the arc-shaped structure of the guide plate 336 is fixedly installed on the rear side of the latch square rod 334.

[0045] In this embodiment, as Figure 5 shown, a return spring is arranged between the scraping knife 31 and the rack 1. Two resistance columns arranged symmetrically in the front and rear are slidably arranged inside the scraping knife 31. The ends of the two resistance columns away from each other are in a dome structure. Hemispherical grooves for inserting the dome structures of the resistance columns are arranged on the rack 1. Pushing springs are arranged between the resistance columns and the scraping knife 31. In the initial state, the pushing springs push the dome structures of the resistance columns to insert into the corresponding hemispherical grooves through their own elastic forces, so that the scraping knife 31 and the rack 1 are locked together, and the return spring is in a natural elongation state.

[0046] In the initial state, the pendulum 32 is vertically arranged under the action of gravity. The latch square rod 334 is inserted into the slot of the rotating shaft of the pendulum 32 under the elastic force of the pushing spring, so that the pendulum 32 is locked together with the synchronous ring 333 through the latch square rod 334. At this time, the driven swing plate 331 is also vertically arranged, and the driven swing plate 331 is located on the left side of the shovel 31.

[0047] When the frame 1 moves to the right, the frame 1 drives the shovel 31 to remove the excess welding slag on the weld. The frame 1 drives the side shovel 35 through the guide groove member 34 to remove the excess welding slag adhering to the side of the workpiece, avoiding omission and ensuring the shaping effect.

[0048] When the side shovel 35 or the shovel 31 shovels on the welding slag with relatively strong adhesion, the side shovel 35 or the shovel 31 is blocked by the welding slag and cannot move synchronously with the frame 1. When the resistance of the welding slag to the side shovel 35 or the shovel 31 reaches a certain value, the frame 1 drives the hemispherical groove thereon to push the resistance column towards the inside of the shovel 31, so that the resistance column no longer locks the shovel 31 on the frame 1.

[0049] Subsequently, the frame 1 continues to move to the right. The frame 1 drives the driven swing plate 331 to move synchronously, so that the reaction force of the shovel 31 on the driven swing plate 331 pushes the driven swing plate 331 to deflect upward. The driven swing plate 331 drives the belt pulley 332 at the pendulum 32 to rotate synchronously through the belt pulley 332 and the synchronous belt thereon. The belt pulley 332 at the pendulum 32 drives the pendulum 32 to deflect upward through the synchronous ring 333, thereby storing energy for the pendulum 32.

[0050] When the synchronous ring 333 rotates, it drives the latch square rod 334 to rotate synchronously, so that the latch square rod 334 drives the linkage strut thereon to move along the outer side of the arc structure of the guide plate 336. When the frame 1 moves to the right relative to the shovel 31, the return spring is compressed. The compression amount of the return spring gradually increases, so that the return spring gradually increases the driving force applied to the shovel 31 through its own elastic force, so that the shovel 31 gradually increases the shoveling force on the firm welding slag, preventing the shovel 31 from skewing or shaking due to sudden change of resistance.

[0051] Refer to Figure 3 and Figure 5 As shown in, a linkage frame plate 351 is fixedly installed on the left side of the shovel 31. Two moving gears 352 arranged symmetrically before and after are rotatably arranged on the linkage frame plate 351. Two fixed racks 353 respectively meshing with the two moving gears 352 are fixedly installed on the frame 1. The eccentric positions of the moving gears 352 are hinged to the corresponding side shovels 35 through connecting plates 354.

[0052] When the frame 1 moves to the right relative to the scraper 31, the frame 1 drives the fixed rack 353 to move to the right relative to the moving gear 352, causing the fixed rack 353 to drive the moving gear 352 to rotate. The moving gear 352 reciprocally pushes and pulls the side scraper 35 through the connecting plate 354 to slide on the arc-shaped groove of the guide groove member 34, so that the side scraper 35 swings reciprocally with the side line in contact with the side of the workpiece as the axis, thereby reciprocally changing the direction of the scraping force of the side scraper 35 on the welding slag, so as to remove the welding slag as much as possible before the pendulum 32 impacts the side scraper 35, reduce the number of impacts of the pendulum 32, and ensure the stability of welding.

[0053] When the frame 1 drives the pendulum 32 to move to the position of the scraper 31 and the elastic force of the return spring is still not sufficient to push the scraper 31 or the side scraper 35 to remove the welding slag, the arc-shaped structure of the guide plate 336 pushes the linkage strut, causing the linkage strut to drive the latch square rod 334 to withdraw from the slot inside the rotating shaft of the pendulum 32, unlocking the pendulum 32 from the synchronous ring 333. Subsequently, the pendulum 32 swings downward under the action of gravity and hammers on the scraper 31, causing the scraper 31 or the side scraper 35 to exert an instantaneous impact force on the welding slag, thereby removing the welding slag and ensuring the consistency of the weld finishing.

[0054] Refer to Figure 1 、 Figure 2 and Figure 6 As shown in

[0055] Refer to Figure 2 、 Figure 6 and Figure 7 The stabilizing mechanism 4 includes two pushing members 42 arranged symmetrically before and after and provided inside the frame 1 through the lifting assembly 41. A abutting plate 43 for abutting against the workpiece is slidably arranged on the lower side of the pushing member 42 left and right. The lifting assembly 41 presses the abutting plate 43 against the workpiece through the pushing member 42 to prevent the workpiece from vibrating when the scraper 31 removes the welding slag. The stabilizing mechanism 4 further includes a canceling assembly 44 for further stabilizing the workpiece.

[0056] When relatively firm welding slag blocks the movement of the scraping blade 31 or the side scraping plate 35, the telescopic section of the extended hydraulic cylinder 412 drives the push-pull plate 413 to move downward. The push-pull plate 413 drives the pusher 42 to move towards the side of the workpiece through the horizontal linear groove on it, so that the pusher 42 drives the abutting plate 43 to tightly abut against the side of the workpiece, thereby increasing the stability of the workpiece by abutting, and the frame 1 can continue to drive the pusher 42 to slide on the abutting plate 43, so that the welding of the welding torch 2 does not need to be stopped.

[0057] Refer to Figure 6 , Figure 7 and Figure 8 , the counteracting assembly 44 includes a linkage frame 441 slidably arranged on the outside of the pusher 42 along the length direction of the pusher 42. A push plate 442 is slidably arranged on the left and right sides of the outside of the linkage frame 441. The push plate 442 is hinged to the abutting plate 43 through a plurality of parallel hinge plates 443.

[0058] Refer to Figure 6 , Figure 8 and Figure 9 , the counteracting assembly 44 further includes a damping telescopic rod 444 fixedly connected to the right side surface of the scraping blade 31. A trapezoidal plate 445 is slidably arranged up and down inside the frame 1 through a guide post. The inclined surface on the trapezoidal plate 445 is arranged in parallel with the push plate 442 at the corresponding position. A locking structure for locking the push plate 442 and the linkage frame 441 together when the push plate 442 is pressed by the inclined surface of the trapezoidal plate 445 is arranged on the push plate 442. The damping telescopic rod 444 is connected and driven to the trapezoidal plate 445 through a commutation transmission structure.

[0059] The locking structure in this embodiment, as Figure 8 and Figure 9 shown, includes an L-shaped locking member 446 slidably arranged on the linkage frame 441 along the direction perpendicular to the side surface of the workpiece. A plurality of positioning grooves for the L-shaped locking member 446 to insert are equidistantly arranged on the push plate 442 in the left-right direction. A transmission plate member 447 slidably connected to the left and right of the L-shaped locking member 446 is slidably arranged on the push plate 442 along the direction perpendicular to the side surface of the workpiece. A compression spring is arranged between the transmission plate member 447 and the push plate 442. The transmission plate member 447 is slidably connected to the inclined surface at the corresponding position of the trapezoidal plate 445.

[0060] The commutation transmission structure in this embodiment, as Figure 6 shown, includes a commutation gear 11 rotatably arranged on the frame 1. A moving rack one 12 located above the commutation gear 11 and meshing with it is slidably arranged on the frame 1. The left end of the moving rack one 12 is fixedly connected to the damping telescopic rod 444. A moving rack two 13 located on the right of the commutation gear 11 and meshing with it is slidably arranged on the frame 1 in the vertical direction. The right side of the moving rack two 13 is fixedly connected to the trapezoidal plate 445.

[0061] It should be noted that a torsion spring is provided between the hinge plate 443 and the abutment plate 43. The torsion spring is not shown in the figure. The torsion spring drives the hinge plate 443 to be in a state of gradually tilting to the right from bottom to top in the initial state through its own elastic force, and the push plate 442, the abutment plate 43 and a plurality of hinge plates 443 arranged in parallel are combined into a parallelogram structure.

[0062] When the pendulum 32 impacts the shovel 31, the shovel 31 pushes the first moving rack 12 to the right through the damping telescopic rod 444. The first moving rack 12 moves the second moving rack 13 downward through the reversing gear 11. The second moving rack 13 simultaneously pushes the two transmission plate members 447 to move towards the side of the workpiece through the trapezoidal plate 445, so that the transmission plate member 447 pushes the L-shaped locking member 446 to insert into the positioning groove at the corresponding position, so that the linkage frame 441 and the push plate 442 are locked into a whole, which makes the push plate 442 unable to slide left and right relative to the pusher 42, and further makes the push plate 442 unable to slide relative to the frame 1.

[0063] Subsequently, the force of the pendulum 32 impacting the shovel 31 is transmitted to the push plate 442 through the transmission plate member 447, so that the push plate 442 pushes the abutment plate 43 through the hinge plate 443, so that the abutment plate 43 moves in the reverse direction of the direction in which the pendulum 32 impacts the shovel 31. The abutment plate 43 exerts a reaction force of the impact of the shovel 31 on the workpiece, so as to offset the impact force of the shovel 31 on the welding slag and further ensure the stability of the workpiece.

[0064] Then, the return spring pushes the shovel 31 to reset through its own elastic force, so that the driven swing plate 331 and the synchronous ring 333 are reset. The plug lock square rod 334 is inserted into the slot of the rotating shaft of the pendulum 32 again under the push of the elastic force of the push spring. At the same time, the telescopic section of the retractable hydraulic cylinder 412 drives the abutment plate 43 to move to the initial position.

[0065] Refer to Figures 1 to 9 , when the present invention welds the H-shaped workpiece, it further includes the following steps: First step, place the steel structure parts that are preliminarily fixedly connected together after spot welding on the flipping platform through the handling equipment, and then move the frame 1 to the right to drive the welding torch 2 to weld the welds of the steel structure parts.

[0066] Second step, the frame 1 drives the shovel 31 to remove the redundant welding slag on the weld. The frame 1 drives the side shovel plate 35 to remove the redundant welding slag adhering to the side of the workpiece through the guide groove member 34, so as to avoid omission and ensure the shaping effect.

[0067] Third step, when the side shovel plate 35 or the shovel 31 shovels on the welding slag with relatively firm adhesion, the reaction force of the shovel 31 on the driven swing plate 331 pushes the driven swing plate 331 to deflect upward, so that the pendulum 32 synchronously deflects upward, thereby storing energy for the pendulum 32.

[0068] In the fourth step, the telescopic section of the extended hydraulic cylinder 412 drives the push-pull plate 413 to move downward. The push-pull plate 413 drives the abutting plate 43 to tightly abut against the side of the workpiece through the pusher 42, thereby increasing the stability of the workpiece by the abutting method.

[0069] In the fifth step, the frame 1 drives the fixed rack 353 to move rightward relative to the moving gear 352, so that the moving gear 352 drives the side shovel plate 35 to swing reciprocally with the side line where the side shovel plate 35 contacts the side of the workpiece as the axis, thereby reciprocally changing the direction of the shoveling force of the side shovel plate 35 on the welding slag, so as to remove the welding slag as much as possible before the pendulum 32 impacts the side shovel plate 35.

[0070] In the sixth step, the frame 1 drives the pendulum 32 to move to the position of the shovel 31. The guide plate 336 drives the latch square rod 334 to withdraw from the slot inside the rotating shaft of the pendulum 32, so that the pendulum 32 hammers on the shovel 31, so that the shovel 31 or the side shovel plate 35 exerts an instantaneous impact force on the welding slag, thereby removing the welding slag.

[0071] In the seventh step, the pendulum 32 pushes the abutting plate 43 through the shovel 31, so that the abutting plate 43 moves in the reverse direction of the direction in which the pendulum 32 impacts the shovel 31, thereby offsetting the impact force of the shovel 31 on the welding slag and further ensuring the stability of the workpiece.

[0072] In the eighth step, the return spring pushes the shovel 31 to reset through its own elastic force, so that the latch square rod 334 is inserted into the slot inside the rotating shaft of the pendulum 32 again under the push of the elastic force of the push spring. At the same time, the telescopic section of the retracted hydraulic cylinder 412 drives the abutting plate 43 to move to the initial position.

[0073] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention, and still be covered by the protection scope of the present invention.

Claims

1. A laser welding machine for steel structure, comprising a frame sliding on a track, a welding gun fixedly installed inside the frame, characterized in that: The frame is equipped with a shovel welding slag mechanism for shaping the weld seam and a stabilizing mechanism for pressing and protecting the workpiece; The welding slag scraping mechanism includes a scraper that is slidably arranged on the left side of the frame inside and outside and is used to scrape away excess welding slag on the weld, and a pendulum that is hinged on the frame. When the scraper moves to a position where the welding slag is harder, the pendulum can be driven to swing and accumulate force through a linkage assembly arranged on the frame, and then the pendulum hammers on the scraper to facilitate scraping away the harder welding slag. The stabilizing mechanism includes two pushing members arranged symmetrically front and back inside the frame through a lifting component. A supporting plate for leaning against the workpiece is provided on the lower side of the pushing member and slides left and right. The lifting component presses the supporting plate against the workpiece through the pushing member to prevent the scraper from causing vibration to the workpiece when scraping off the welding slag. The stabilizing mechanism also includes a counteracting component for further stabilizing the workpiece.

2. A steel structure laser welding machine according to claim 1, characterized in that: The linkage assembly includes a driven swing plate rotatably arranged on a frame, the driven swing plate is located at the right part of the pendulum, pulleys are arranged on the front sides of the driven swing plate and the pendulum, a synchronous belt is wound around the outer sides of the two pulleys, the driven swing plate is fixedly connected to the pulley thereon, and the pendulum is rotatably connected to the pulley thereon.

3. A steel structure laser welding machine according to claim 2, characterized in that: A synchronous ring is fixedly installed on the front side of the pulley at the pendulum, and the synchronous ring is rotatably sleeved on the outer side of the rotating shaft of the pendulum. A locking square rod is slidably arranged along its radial direction on the synchronous ring, and a slot for inserting the locking square rod is opened on the rotating shaft of the pendulum.

4. A steel structure laser welding machine according to claim 3, characterized in that: A linkage bracket is fixedly installed on the rotating shaft of the pendulum, the linkage bracket is slidably connected to the locking square rod, a pushing spring is arranged between the linkage bracket and the locking square rod, a guide plate with an arc-shaped front portion is fixedly installed on the frame, and a linkage pillar moving along the outer side of the arc-shaped structure of the guide plate is fixedly installed on the rear side of the locking square rod.

5. The laser welding machine for steel structure according to claim 1, characterized in that: An inverted V-shaped guide groove member is fixedly installed on the left side of the scraper through a support plate. Two groups of arc grooves are symmetrically opened front and back on the guide groove member. Each group consists of two arc grooves arranged up and down. A side scraper plate for scraping the side of the workpiece is slidably arranged along its trajectory on each group of arc grooves.

6. A steel structure laser welding machine according to claim 5, characterized in that: The lower side of the side shovel plate is flush with the lower side of the scraper, the two side shovel plates are symmetrically arranged and V-shaped, and the sides of the two side shovel plates in contact with the workpiece are arranged perpendicular to each other. When the side shovel plates move along the corresponding arc grooves, the side shovel plates rotate around the edge lines that contact the side of the workpiece as the axis.

7. The laser welding machine for steel structure according to claim 5, characterized in that: A linkage frame plate is fixedly installed on the left side of the shovel blade, and two moving gears symmetrically arranged front and back are rotatably arranged on the linkage frame plate. Two fixed racks respectively meshing with the two moving gears are fixedly installed on the frame, and the eccentric position of the moving gear is hinged to the side shovel plate at the corresponding position through a connecting plate.

8. The laser welding machine for steel structure according to claim 1, characterized in that: The lifting assembly includes a mounting plate fixedly mounted on a frame, a pushing member is slidably connected to the mounting plate in a direction perpendicular to the side of the workpiece, a hydraulic cylinder is fixedly mounted on the mounting plate, a push-pull plate is fixedly mounted on the lower end of the telescopic section of the hydraulic cylinder, and two horizontal straight grooves symmetrically arranged front and back are provided on the push-pull plate, and the upper side of the pushing member slides inside the corresponding horizontal straight groove through a raised column.

9. The laser welding machine for steel structure according to claim 1, characterized in that: The offset assembly comprises a linkage frame slidably arranged on the outside of the pusher along its length direction, a push plate is slidably arranged on the outside of the linkage frame, and the push plate is hinged to the abutment plate through a plurality of hinge plates arranged in parallel.

10. A laser welding machine for steel structure according to claim 9, characterized in that: The offset assembly also includes a damping telescopic rod fixedly connected to the right side surface of the shovel blade. A trapezoidal plate is arranged inside the frame for sliding up and down through a guide column. The inclined surface on the trapezoidal plate is arranged parallel to the push plate at the corresponding position. The push plate is provided with a locking structure that locks the push plate and the linkage frame together when pressed by the inclined surface of the trapezoidal plate. The damping telescopic rod is connected and transmitted to the trapezoidal plate through a gear rack reversing transmission structure.

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