Automatic welding equipment and method for frame longitudinal beam

Abstract

The invention discloses an automatic welding device and method for a vehicle frame longitudinal beam, and relates to the technical field of longitudinal beam welding, comprising a base, welding mechanical arms are installed on both sides of the top of the base, and a plurality of support seats for supporting the longitudinal beams are installed on the top of the base through bolts, and also comprises: a positioning plate detachably connected to the support seat, a first electric push rod is fixedly connected to one side of the positioning plate, and a fixing plate is fixedly connected to the telescopic end of the first electric push rod, an upper pressing plate for fixing the upper and lower longitudinal beams is arranged inside the fixing plate, and then the upper and lower longitudinal beams are positioned in the vertical direction by the upper pressing plate, and the sliding seat is moved to the center position of the upper and lower longitudinal beams by the support piece on the positioning frame, and at this time, the adjustment plate is pushed by the second electric push rod to make the adjustment plate contact with the inner walls of the upper and lower longitudinal beams respectively, so that the two sides of the upper and lower longitudinal beams are aligned, so as to ensure that deviation is avoided during the welding process when the upper and lower longitudinal beams are aligned, and at the same time, the welding of the welding equipment will not be affected.

Description

Technical Field

[0001] The invention relates to the technical field of longitudinal beam welding, and in particular to an automatic welding device and method for a vehicle frame longitudinal beam. Background Art

[0002] The longitudinal beam is a beam in the upper structure of the car, which is arranged along the axis of the bridge and supported on the crossbeam. The frame longitudinal beam is formed by welding two upper and lower parts with grooves. In the automatic welding of the robot, the reliability of welding is the key technical indicator.

[0003] When the pressing jig is used to press the product during welding during the welding process, since the upper and lower longitudinal beams need to be welded at the butt joints on both sides, the existing jig will squeeze and fix the upper and lower longitudinal beams on the outside to align the two sides, resulting in the welding equipment being unable to smoothly weld the pressed position during welding; and during the alignment of the upper and lower longitudinal beams, if there are burrs at the welding point, it will inevitably lead to a gap error between the upper and lower longitudinal beams, affecting the quality of the longitudinal beams during the welding process.

[0004] Therefore, it is necessary to provide an automatic welding device and method for frame longitudinal beams to solve the above technical problems. Summary of the invention

[0005] The object of the present invention is to provide an automatic welding device and method for a vehicle frame longitudinal beam, so as to solve the problems of the defects of the prior art mentioned in the above background technology.

[0006] Based on the above ideas, the present invention provides the following technical solutions: an automatic welding device for a frame longitudinal beam, comprising a base, welding mechanical arms are installed on both sides of the top of the base, a plurality of support seats for supporting the longitudinal beam are installed on the top of the base by bolts, and also includes:

[0007] A positioning plate detachably connected to the support seat, a first electric push rod fixedly connected to one side of the positioning plate, a telescopic end of the first electric push rod fixedly connected to a fixing plate, an upper pressing plate for fixing the upper and lower longitudinal beams is arranged inside the fixing plate, a sliding seat is slidably connected inside the fixing plate, a positioning frame is fixedly connected to one end of the sliding seat, and a propping piece is arranged outside the positioning frame for pushing the sliding seat to a central position;

[0008] Adjustment plates are provided on both sides of the positioning frame, a second electric push rod is fixedly connected between the adjustment plates and the positioning frame, and leveling parts for aligning the upper and lower longitudinal beams are provided on the outer sides of the two adjustment plates;

[0009] A fixing frame is arranged between two relative positioning frames, and cleaning pieces are arranged at both ends of the fixing frame. The cleaning pieces extend to the gap between the upper and lower longitudinal beams. A traction piece is arranged between the two positioning frames, and the traction piece drives the cleaning piece to process the burrs in the gap between the upper and lower longitudinal beams.

[0010] As a further solution of the present invention: a screw rod is arranged inside the fixed plate, the screw rod passes through the fixed plate and is rotatably connected to the fixed plate, the screw rod passes through the upper pressure plate and is connected to the upper pressure plate through a ball nut pair, the upper pressure plate is slidably connected to the fixed plate, side clamping plates are fixedly connected on both sides of the upper pressure plate, a driving motor is fixedly connected to the top of the fixed plate, and the output shaft of the driving motor is fixedly connected to the screw rod.

[0011] As a further solution of the present invention: the expansion member includes an internal threaded barrel arranged inside the positioning frame, the outer side of the internal threaded barrel is rotatably connected to a support plate, the support plate is fixedly connected to the positioning frame, both ends of the internal threaded barrel are threadedly connected to threaded rods, one end of the two threaded rods is fixedly connected to the expansion plate, a first telescopic rod is fixedly connected between the expansion plate and the positioning frame, a first gear is fixedly connected to the outer side of the internal threaded barrel, a second gear is meshingly connected to the outer side of the first gear, a first motor is fixedly connected to the inside of the positioning frame, and the output shaft of the first motor is fixedly connected to the second gear.

[0012] As a further solution of the present invention: the leveling part includes support frames respectively arranged at both ends of the leveling plate, the outer sides of the two support frames are fixedly connected to the first electromagnet, both ends of the leveling plate are provided with sliding grooves, the outer sides of the support frames are fixedly connected to sliding plates, the sliding plates are arranged inside the sliding grooves and are slidably connected to the leveling plate, a pushing plate is provided on one side of the leveling plate, a third electric push rod is fixedly connected between the pushing plate and the leveling plate, and both ends of the pushing plate are rotatably connected to the two support frames with hinged rods.

[0013] As a further solution of the present invention: the leveling member also includes an airbag, which is arranged on a support frame on the leveling plate, a placement groove is opened on the outer side of the support frame, the airbag is fixedly connected to the inside of the placement groove, and a micro air pump is fixedly connected to the inside of the support frame, and the air outlet of the micro air pump is connected to the airbag.

[0014] As a further solution of the present invention: it also includes: a detection frame arranged on one side of the support frame, a second telescopic rod is fixedly connected between the detection frame and the support frame, a movable plate is arranged inside the detection frame and is slidably connected to the detection frame, a pulling rod is fixedly connected to the top of the movable plate, the pulling rod passes through the detection frame and is slidably connected to the detection frame, a first spring is fixedly connected between the movable plate and the top end inside the detection frame, one end of the movable plate is rotatably connected to a contact wheel for contacting the top of the upper longitudinal beam, an indicator plate is fixedly connected to the outer side of the movable plate, and a scale value is arranged on the outer side of the detection frame.

[0015] As a further solution of the present invention: the traction part includes a fourth electric push rod fixedly connected to the outside of the positioning frame, the telescopic end of the fourth electric push rod is fixedly connected to a mounting plate, the top of the mounting plate is rotatably connected to a rotating rod, the bottom of the mounting plate is fixedly connected to a second motor, and the output shaft of the second motor is fixedly connected to the rotating rod, a groove is provided on the outside of the rotating rod, a connecting cylinder is provided on the sliding sleeve of the outside of the rotating rod, a protrusion is provided on the inner wall of the connecting cylinder, and the protrusion extends into the groove, a winding disk is fixedly connected to the outside of the rotating rod corresponding to another positioning frame, a traction rope is wound and fixedly connected to the outside of the winding disk, and the other end of the traction rope is wound and fixedly connected to the outside of the connecting cylinder.

[0016] As a further solution of the present invention: the cleaning piece includes a fixed frame fixedly connected to the outside of the traction rope, both ends of the fixed frame are fixedly connected to limit rods, the outsides of the two limit rods are slidably connected with magnetic blocks, one end of the limit rod is fixedly connected to an energized electromagnet, the energized electromagnet magnetically repels the magnetic block after being energized, and a second spring is fixedly connected between the magnetic block and the fixed frame.

[0017] As a further solution of the present invention: the cleaning piece also includes a connecting plate fixedly connected to the bottom of the magnetic block, one end of the connecting plate is rotatably connected to a rotating wheel, the top of the connecting plate is fixedly connected to a fifth electric push rod, and the telescopic end of the fifth electric push rod is fixedly connected to a cleaning knife.

[0018] A method for automatic welding of a frame longitudinal beam is also provided, which further comprises:

[0019] Step 1: First, install two positioning plates on one side of the support seat at both ends of the lower longitudinal beam according to the length of the lower longitudinal beam, then place the lower longitudinal beam on the top of the support seat for fixing, and then connect the traction parts between the two positioning frames;

[0020] Step 2: Then align the upper longitudinal beam with the lower longitudinal beam, and then use the upper pressure plate to position the upper and lower longitudinal beams in the vertical direction, and use the support member on the positioning frame to move the sliding seat to the center position of the upper and lower longitudinal beams. At this time, the second electric push rod pushes the adjustment plate to make the adjustment plate contact with the inner wall of the upper and lower longitudinal beams respectively, so that the upper and lower longitudinal beams are aligned on both sides;

[0021] Step 3: Before welding, start the traction part to drive the cleaning part to slide between the welding gaps of the upper and lower longitudinal beams to remove the burrs;

[0022] Step 4: Finally, the upper and lower longitudinal beams are welded by the welding robot arm, and then the welded longitudinal beams are taken out by removing the traction piece from one of the positioning frames.

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

[0024] 1. Use the upper pressure plate to position the upper and lower longitudinal beams in the vertical direction, and use the support parts on the positioning frame to move the sliding seat to the center of the upper and lower longitudinal beams. At this time, use the second electric push rod to push the adjustment plate to make the adjustment plate contact the inner walls of the upper and lower longitudinal beams respectively, so that the two sides of the upper and lower longitudinal beams are aligned to ensure that the upper and lower longitudinal beams are aligned to avoid deviations during welding, and at the same time, it will not affect the welding of the welding equipment.

[0025] 2. By moving the indicator plate on the outside of the plate to stay at the scale value position set on the detection frame, it is possible to determine whether the upper and lower longitudinal beams are aligned left and right. In addition, the position changes of the indicator plate can be observed during the welding process to determine whether the welding on both sides of the longitudinal beam is balanced and whether the longitudinal beam is bent after welding.

[0026] 3. Start the micro air pump to inflate the airbags on the support frame, and then fine-tune the upper and lower longitudinal beams to ensure the consistency of welding height.

[0027] 4. Start the fifth electric push rod to push the cleaning knife to the gap between the upper and lower longitudinal beams, and process the longitudinal beams of different sizes. As the traction rope is pulled, the cleaning knife moves quickly in the gap between the upper and lower longitudinal beams, thereby removing the burrs at the joints and avoiding errors caused by burrs during welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 It is a schematic diagram of the structure of the fixing plate of the present invention;

[0031] Figure 3 It is a schematic diagram of the structure of the positioning plate of the present invention;

[0032] Figure 4 It is a schematic diagram of the structure of the upper pressing plate of the present invention;

[0033] Figure 5 The present invention Figure 4 A schematic diagram of the enlarged structure of part A;

[0034] Figure 6 It is a schematic diagram of the positioning frame structure of the present invention;

[0035] Figure 7 It is a schematic diagram of the structure of the propping member of the present invention;

[0036] Figure 8 It is a schematic diagram of the structure of the leveling member of the present invention;

[0037] Fig. 9 The present invention Figure 8 A schematic diagram of the enlarged structure of part B;

[0038] Fig.10 It is a schematic diagram of the structure of the traction rope of the present invention;

[0039] Fig.11 It is a schematic diagram of the structure of the cleaning member of the present invention.

[0040] In the figure: 1, base; 101, welding robot; 2, support seat; 3, fixed plate; 301, first electric push rod; 302, positioning plate; 401, upper pressure plate; 402, side clamping plate; 403, screw rod; 5, positioning frame; 500, sliding seat; 501, opening plate; 502, first telescopic rod; 503, threaded rod; 504, internal threaded cylinder; 505, first gear; 506, second gear; 507, first motor; 601, adjustment plate; 602, second electric push rod; 603, support frame; 6031, micro air pump; 6032, air bag; 604, sliding plate; 605, push rod Moving plate; 606, third electric push rod; 607, hinged rod; 701, detection frame; 702, pulling rod; 703, first spring; 704, moving plate; 705, contact wheel; 706, indicator plate; 801, mounting plate; 802, fourth electric push rod; 803, rotating rod; 804, connecting tube; 805, second motor; 806, winding disk; 807, traction rope; 901, fixing frame; 902, limiting rod; 903, magnetic block; 904, second spring; 905, energized electromagnet; 906, connecting plate; 907, cleaning knife; 908, fifth electric push rod; 909, rotating wheel. DETAILED DESCRIPTION

[0041] 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.

[0042] like Figures 1 to 11 As shown, an automatic welding device and method for a frame longitudinal beam include the following embodiments:

[0043] like Figures 1 to 4As shown, embodiment 1 includes a base 1, welding mechanical arms 101 are installed on both sides of the top of the base 1, and a horizontal moving module is provided at the bottom of the welding mechanical arm 101 in the actual process to drive the welding mechanical arm 101 to move horizontally, and a plurality of support seats 2 for supporting the longitudinal beam are installed on the top of the base 1 by bolts, and a clamping device is provided inside the support seat 2, and the lower longitudinal beam can be fixed by an electric telescopic rod drive, and also includes:

[0044] A positioning plate 302 detachably connected to the support seat 2, a first electric push rod 301 is fixedly connected to one side of the positioning plate 302, a telescopic end of the first electric push rod 301 is fixedly connected to a fixing plate 3, an upper pressing plate 401 for fixing the upper and lower longitudinal beams is arranged inside the fixing plate 3, a sliding seat 500 is slidably connected inside the fixing plate 3, a positioning frame 5 is fixedly connected to one end of the sliding seat 500, and a propping piece is arranged outside the positioning frame 5 for pushing the sliding seat 500 to a central position;

[0045] Adjustment plates 601 are provided on both sides of the positioning frame 5, a second electric push rod 602 is fixedly connected between the adjustment plates 601 and the positioning frame 5, and leveling parts for aligning the upper and lower longitudinal beams are provided on the outer sides of the two adjustment plates 601;

[0046] A screw rod 403 is arranged inside the fixed plate 3, the screw rod 403 passes through the fixed plate 3 and is rotatably connected to the fixed plate 3, the screw rod 403 passes through the upper pressure plate 401 and is connected to the upper pressure plate 401 through a ball nut pair, the upper pressure plate 401 is slidingly connected to the fixed plate 3, side clamping plates 402 are fixedly connected on both sides of the upper pressure plate 401, a driving motor is fixedly connected to the top of the fixed plate 3, and the output shaft of the driving motor is fixedly connected to the screw rod 403.

[0047] In the specific implementation, in the actual welding process, the upper and lower longitudinal beams need to be aligned and welded by welding equipment. However, during the welding process, the clamp will block the welding equipment during the pressing process of the upper and lower longitudinal beams, which is not convenient for the welding equipment to weld. Therefore, in this solution, two positioning plates 302 are respectively installed on one side of the support seat 2 at both ends of the lower longitudinal beam according to the length of the lower longitudinal beam, and then the lower longitudinal beam is placed on the top of the support seat 2 for fixing, and then the traction parts between the two positioning frames 5 are docked; through the side clamping plate 40 2 Align the upper longitudinal beam with the lower longitudinal beam to ensure that the two ends are on the same plane, and then use the upper pressure plate 401 to position the upper and lower longitudinal beams in the vertical direction, and use the expansion piece on the positioning frame 5 to move the sliding seat 500 to the center position of the upper and lower longitudinal beams. At this time, the second electric push rod 602 pushes the adjustment plate 601 to make the adjustment plate 601 contact with the inner wall of the upper and lower longitudinal beams respectively, so that the two sides of the upper and lower longitudinal beams are aligned, ensuring that the upper and lower longitudinal beams are aligned to avoid deviation during welding, and at the same time, it will not affect the welding of the welding equipment.

[0048] like Figure 6 to Figure 7 As shown, in this embodiment, the expansion member includes an internal threaded tube 504 arranged inside the positioning frame 5, and a support plate is rotatably connected to the outer side of the internal threaded tube 504, and the support plate is fixedly connected to the positioning frame 5, and threaded rods 503 are threadedly connected to the inside of both ends of the internal threaded tube 504, and one end of the two threaded rods 503 is fixedly connected to the expansion plate 501, and a first telescopic rod 502 is fixedly connected between the expansion plate 501 and the positioning frame 5, and a first gear 505 is fixedly connected to the outer side of the internal threaded tube 504, and a second gear 506 is meshedly connected to the outer side of the first gear 505, and a first motor 507 is fixedly connected to the inside of the positioning frame 5, and the output shaft of the first motor 507 is fixedly connected to the second gear 506.

[0049] During specific implementation, after the upper pressure plate 401 presses the upper longitudinal beam, the first motor 507 inside the positioning frame 5 is started, and the first motor 507 drives the second gear 506 to rotate, and the second gear 506 drives the meshing first gear 505 to rotate, and the first gear 505 drives the fixedly connected internal threaded tube 504 to rotate. Since the two ends of the internal threaded tube 504 are respectively threadedly connected to the two threaded rods 503, and the threaded rods 503 are fixedly connected to the support plate 501, a first telescopic rod 502 is fixedly connected between the support plate 501 and the positioning frame 5, and then the two support plates 501 can be pushed to move, so that the two support plates 501 are respectively in contact with the upper and lower longitudinal beams, and move to the center of the upper and lower longitudinal beams through the extrusion positioning frame 5. At this time, the second electric push rod 602 is started to make the adjustment plate 601 contact the inner walls of the upper and lower longitudinal beams, thereby propping them up, ensuring that the upper and lower longitudinal beams will not move during welding, and ensuring stability during welding.

[0050] like Figures 7 and 8 As shown, embodiment 2: the leveling member includes support frames 603 respectively arranged at both ends of the leveling plate 601, the outer sides of the two support frames 603 are fixedly connected with the first electromagnet, both ends of the leveling plate 601 are provided with sliding grooves, the outer sides of the support frames 603 are fixedly connected with sliding plates 604, the sliding plates 604 are arranged inside the sliding grooves and are slidingly connected to the leveling plate 601, a pushing plate 605 is provided on one side of the leveling plate 601, a third electric push rod 606 is fixedly connected between the pushing plate 605 and the leveling plate 601, and both ends of the pushing plate 605 are rotatably connected with the two support frames 603 with hinged rods 607.

[0051] During specific implementation, when the adjustment plate 601 contacts the inner sides of the upper and lower longitudinal beams, the third electric push rod 606 is started to drive the push plate 605 to move, and the push plate 605 pushes the support frame 603 to move by rotating the connected hinge rod 607, so that the support frame 603 fits with the right angles inside the upper and lower longitudinal beams, and then the first electromagnet on the outside of the support frame 603 is energized, so that the support frame 603 is in close contact with the upper and lower longitudinal beams, thereby enhancing the fixing effect of the upper and lower longitudinal beams.

[0052] like Figures 6 to 9 As shown, in this embodiment, the leveling member also includes an airbag 6032, which is arranged on a support frame 603 on the leveling plate 601. A placement groove is opened on the outer side of the support frame 603. The airbag 6032 is fixedly connected to the inside of the placement groove. A micro air pump 6031 is fixedly connected to the inside of the support frame 603, and the air outlet end of the micro air pump 6031 is connected to the airbag 6032.

[0053] It also includes a detection frame 701 arranged on one side of the support frame 603, a second telescopic rod is fixedly connected between the detection frame 701 and the support frame 603, a movable plate 704 is arranged inside the detection frame 701 and is slidably connected to the detection frame 701, a pulling rod 702 is fixedly connected to the top of the movable plate 704, the pulling rod 702 penetrates the detection frame 701 and is slidably connected to the detection frame 701, a first spring 703 is fixedly connected between the movable plate 704 and the top of the inner part of the detection frame 701, one end of the movable plate 704 is rotatably connected to a contact wheel 705 for contacting the top of the upper longitudinal beam, an indicator plate 706 is fixedly connected to the outer side of the movable plate 704, and a scale value is arranged on the outer side of the detection frame 701.

[0054] In specific implementation, by pushing the detection frame 701, the rotating contact wheel 705 on the moving plate 704 inside the detection frame 701 contacts the top of the upper longitudinal beam, and the indicator plate 706 outside the moving plate 704 stays at the scale value position set on the detection frame 701, so as to judge whether the upper and lower longitudinal beams are aligned left and right, and the position change of the indicator plate 706 can also be observed during the welding process to determine whether the welding on both sides of the longitudinal beam is balanced, and whether the longitudinal beam after welding is deformed by lateral bending;

[0055] At the same time, according to the indication of the indication board 706, the micro air pump 6031 can be started to inflate the air bag 6032 provided on the support frame 603, and then the upper and lower longitudinal beams can be fine-tuned on both sides to ensure the consistency of the welding height.

[0056] like Figure 10 to Figure 11As shown, in Example 4: during the alignment welding process of the upper and lower longitudinal beams, burrs are bound to exist at their welding joints. If burrs exist, it will cause error gaps when the upper and lower longitudinal beams are welded. Therefore, in this scheme, a fixing frame 901 is provided between two relative positioning frames 5, and cleaning pieces are provided at both ends of the fixing frame 901. The cleaning pieces extend to the gap between the upper and lower longitudinal beams, and a traction piece is provided between the two positioning frames 5. The traction piece drives the cleaning piece to process the burrs at the gap between the upper and lower longitudinal beams.

[0057] The traction member includes a fourth electric push rod 802 fixedly connected to the outside of the positioning frame 5, the telescopic end of the fourth electric push rod 802 is fixedly connected to the mounting plate 801, the top of the mounting plate 801 is rotatably connected to a rotating rod 803, the bottom of the mounting plate 801 is fixedly connected to a second motor 805, and the output shaft of the second motor 805 is fixedly connected to the rotating rod 803, a groove is provided on the outside of the rotating rod 803, a connecting tube 804 is slidingly sleeved on the outside of the rotating rod 803, a protrusion is provided on the inner wall of the connecting tube 804, and the protrusion extends into the groove, the outside of the rotating rod 803 corresponding to the other positioning frame 5 is fixedly connected to a winding disk 806, the outside of the winding disk 806 is fixedly connected with a traction rope 807, and the other end of the traction rope 807 is fixedly connected to the outside of the connecting tube 804.

[0058] In specific implementation, when the upper longitudinal beam has not yet docked with the lower longitudinal beam, the connecting tube 804 with the traction rope 807 is slid into the rotating rod 803. At this time, one of the rotating rods 803 is driven to rotate by the second motor 805, and the traction rope 807 is tightened by the cooperation of the groove on the rotating rod 803 and the protrusion on the inner wall of the connecting tube 804. At this time, the cleaning piece is placed between the upper and lower longitudinal beams, and the two second motors 805 cooperate to make the cleaning piece remove burrs on the welding parts of the upper and lower longitudinal beams. The traction rope 807 is used in the traction piece to drive the cleaning piece to move. When the longitudinal beam is curved, the cleaning piece can still be driven to move. When the cleaning is completed, the connecting tube 804 is slid out of the rotating rod 803, and the upper longitudinal beam does not need to be disassembled. The traction rope 807 here can be a steel wire rope, and a contact wheel 705 is arranged on the outside of the cleaning knife 907 to ensure stable contact with the upper and lower longitudinal beams. At the same time, the gap between the upper and lower longitudinal beams is not large, so the cleaning knife 907 will not shake when moving.

[0059] like Fig.11 As shown, in this embodiment, the cleaning component includes a fixed frame 901 fixedly connected to the outside of the traction rope 807, both ends of the fixed frame 901 are fixedly connected to limit rods 902, the outsides of the two limit rods 902 are slidably connected to magnetic blocks 903, one end of the limit rod 902 is fixedly connected to an energized electromagnet 905, which magnetically repels the energized electromagnet 905 from the magnetic block 903 after being energized, and a second spring 904 is fixedly connected between the magnetic block 903 and the fixed frame 901.

[0060] The cleaning piece also includes a connecting plate 906 fixedly connected to the bottom of the magnetic block 903, one end of the connecting plate 906 is rotatably connected to a rotating wheel 909, the top of the connecting plate 906 is fixedly connected to a fifth electric push rod 908, and the telescopic end of the fifth electric push rod 908 is fixedly connected to a cleaning knife 907.

[0061] In the specific implementation, by starting the energized electromagnet 905 on the fixed frame 901, the energized electromagnet 905 pushes the magnetic block 903 to move through the repulsive force, and the connecting plate 906 on the magnetic block 903 moves to the inner sides of the upper and lower longitudinal beams, and the rotating wheel 909 on the connecting plate 906 contacts the inner wall of the upper and lower longitudinal beams, so as to keep the fixed frame 901 stable during the pulling process of the traction rope 807, and by starting the fifth electric push rod 908 to push the cleaning knife 907, the cleaning knife 907 is moved to the gap between the upper and lower longitudinal beams, for longitudinal beams of different sizes. As the traction rope 807 is pulled, the cleaning knife 907 moves quickly in the gap between the upper and lower longitudinal beams, thereby removing the burrs at the joint, avoiding errors caused by burrs during welding. When the cleaning knife 907 scrapes out the burrs, if there are a small amount of burrs on the outside of the upper and lower longitudinal beams, the burrs have been separated from the welding. In the subsequent welding process, the burrs can be easily blown away and will not affect the welding. Here, the cleaning knife 907 is mainly used to deal with the situation where the existence of the welding surface affects the alignment.

[0062] A method for automatic welding of a frame longitudinal beam is also provided, which further comprises:

[0063] Step 1: First, install two positioning plates 302 on one side of the support seat 2 at both ends of the lower longitudinal beam according to the length of the lower longitudinal beam, then place the lower longitudinal beam on the top of the support seat 2 for fixing, and then connect the traction parts between the two positioning frames 5;

[0064] Step 2: Then align the upper longitudinal beam with the lower longitudinal beam, and then use the upper pressing plate 401 to position the upper and lower longitudinal beams in the vertical direction, and use the opening piece on the positioning frame 5 to move the sliding seat 500 to the center position of the upper and lower longitudinal beams. At this time, the second electric push rod 602 pushes the adjustment plate 601 to make the adjustment plate 601 contact with the inner wall of the upper and lower longitudinal beams respectively, so that the two sides of the upper and lower longitudinal beams are aligned;

[0065] Step 3: Before welding, start the traction part to drive the cleaning part to slide between the welding gaps of the upper and lower longitudinal beams to remove the burrs;

[0066] Step 4: Finally, the upper and lower longitudinal beams are welded by the welding robot arm 101, and then the welded longitudinal beams are taken out by removing the traction member from one of the positioning frames 5.

[0067] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0068] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0069] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic welding device for a vehicle frame longitudinal beam, comprising a base (1), welding mechanical arms (101) are installed on both sides of the top of the base (1), and a plurality of support seats (2) for supporting the longitudinal beam are installed on the top of the base (1) by bolts, characterized in that: Also includes: A positioning plate (302) detachably connected to the support seat (2), the positioning plate (302) having a first electric push rod (301) fixedly connected to one side thereof, the telescopic end of the first electric push rod (301) being fixedly connected to a fixing plate (3), the fixing plate (3) having an upper pressing plate (401) for fixing the upper and lower longitudinal beams arranged therein, the fixing plate (3) having a sliding seat (500) slidably connected therein, one end of the sliding seat (500) being fixedly connected to a positioning frame (5), the positioning frame (5) having an opening member arranged on the outside thereof for pushing the sliding seat (500) to a central position; Both sides of the positioning frame (5) are provided with adjustment plates (601), a second electric push rod (602) is fixedly connected between the adjustment plates (601) and the positioning frame (5), and leveling parts for aligning the upper and lower longitudinal beams are provided on the outer sides of the two adjustment plates (601); A fixing frame (901) is arranged between two opposing positioning frames (5), and cleaning pieces are arranged at both ends of the fixing frame (901), the cleaning pieces extending to the gap between the upper and lower longitudinal beams, and a traction piece is arranged between the two positioning frames (5), and the traction piece drives the cleaning piece to process the burrs at the gap between the upper and lower longitudinal beams.

2. The automatic welding equipment for frame longitudinal beams according to claim 1, characterized in that: A screw rod (403) is arranged inside the fixing plate (3), the screw rod (403) passes through the fixing plate (3) and is rotatably connected to the fixing plate (3), the screw rod (403) passes through the upper pressing plate (401) and is connected to the upper pressing plate (401) via a ball nut pair, the upper pressing plate (401) is slidably connected to the fixing plate (3), both sides of the upper pressing plate (401) are fixedly connected to side clamping plates (402), the top of the fixing plate (3) is fixedly connected to a driving motor, and the output shaft of the driving motor is fixedly connected to the screw rod (403).

3. The automatic welding equipment for frame longitudinal beams according to claim 1 is characterized in that: The expansion member comprises an internal threaded barrel (504) arranged inside the positioning frame (5); a support plate is rotatably connected to the outside of the internal threaded barrel (504); the support plate is fixedly connected to the positioning frame (5); threaded rods (503) are threadedly connected to the inside of both ends of the internal threaded barrel (504); one end of each of the two threaded rods (503) is fixedly connected to an expansion plate (501); a first telescopic rod (502) is fixedly connected between the expansion plate (501) and the positioning frame (5); a first gear (505) is fixedly connected to the outside of the internal threaded barrel (504); a second gear (506) is meshingly connected to the outside of the first gear (505); a first motor (507) is fixedly connected to the inside of the positioning frame (5); and an output shaft of the first motor (507) is fixedly connected to the second gear (506).

4. The automatic welding equipment for frame longitudinal beams according to claim 1, characterized in that: The leveling member comprises support frames (603) respectively arranged at two ends of the leveling plate (601), the outer sides of the two support frames (603) are fixedly connected to a first electromagnet, the two ends of the leveling plate (601) are provided with a slide groove, the outer sides of the support frames (603) are fixedly connected to a sliding plate (604), the sliding plate (604) is arranged inside the slide groove and is slidably connected to the leveling plate (601), a push plate (605) is provided on one side of the leveling plate (601), a third electric push rod (606) is fixedly connected between the push plate (605) and the leveling plate (601), and hinge rods (607) are rotatably connected between the two support frames (603) at both ends of the push plate (605).

5. The automatic welding equipment for frame longitudinal beams according to claim 4, characterized in that: The leveling member further comprises an airbag (6032), the airbag (6032) being arranged on a support frame (603) on the leveling plate (601), a placement groove being provided on the outer side of the support frame (603), the airbag (6032) being fixedly connected to the inside of the placement groove, a micro air pump (6031) being fixedly connected to the inside of the support frame (603), and an air outlet end of the micro air pump (6031) being connected to the airbag (6032).

6. The automatic welding equipment for frame longitudinal beams according to claim 5, characterized in that: It also includes a detection frame (701) arranged on one side of the support frame (603), a second telescopic rod being fixedly connected between the detection frame (701) and the support frame (603), a moving plate (704) being arranged inside the detection frame (701) and being slidably connected to the detection frame (701), a pulling rod (702) being fixedly connected to the top of the moving plate (704), the pulling rod (702) penetrating the detection frame (701) and being slidably connected to the detection frame (701), a first spring (703) being fixedly connected between the moving plate (704) and the top of the inside of the detection frame (701), a contact wheel (705) being rotatably connected to one end of the moving plate (704) for contacting the top of the upper longitudinal beam, an indicator plate (706) being fixedly connected to the outside of the moving plate (704), and a scale value being arranged on the outside of the detection frame (701).

7. The automatic welding equipment for frame longitudinal beams according to claim 1, characterized in that: The traction member comprises a fourth electric push rod (802) fixedly connected to the outside of the positioning frame (5); the telescopic end of the fourth electric push rod (802) is fixedly connected to a mounting plate (801); the top of the mounting plate (801) is rotatably connected to a rotating rod (803); the bottom of the mounting plate (801) is fixedly connected to a second motor (805); and the output shaft of the second motor (805) is fixedly connected to the rotating rod (803); a groove is provided on the outside of the rotating rod (803); a connecting tube (804) is slidably sleeved on the outside of the rotating rod (803); a protrusion is provided on the inner wall of the connecting tube (804); the protrusion extends into the inside of the groove; a winding drum (806) is fixedly connected to the outside of the rotating rod (803) corresponding to another positioning frame (5); a traction rope (807) is wound and fixedly connected to the outside of the traction rope (807); and the other end of the traction rope (807) is wound and fixedly connected to the outside of the connecting tube (804).

8. The automatic welding equipment for frame longitudinal beams according to claim 7, characterized in that: The cleaning member comprises a fixing frame (901) fixedly connected to the outside of the traction rope (807), both ends of the fixing frame (901) are fixedly connected to limit rods (902), the outsides of the two limit rods (902) are slidably connected to magnetic blocks (903), one end of the limit rod (902) is fixedly connected to an energized electromagnet (905), the energized electromagnet (905) magnetically repels the magnetic block (903) when energized, and a second spring (904) is fixedly connected between the magnetic block (903) and the fixing frame (901).

9. The automatic welding equipment for frame longitudinal beams according to claim 8, characterized in that: The cleaning member also includes a connecting plate (906) fixedly connected to the bottom of the magnetic block (903), one end of the connecting plate (906) being rotatably connected to a rotating wheel (909), a fifth electric push rod (908) being fixedly connected to the top of the connecting plate (906), and a cleaning knife (907) being fixedly connected to the telescopic end of the fifth electric push rod (908).

10. An automatic welding method for a vehicle frame longitudinal beam, applicable to an automatic welding device for a vehicle frame longitudinal beam as claimed in any one of claims 1 to 9, characterized in that: Also includes: Step 1: First, according to the length of the lower longitudinal beam, two positioning plates (302) are respectively installed on one side of the support seat (2) at both ends of the lower longitudinal beam, and then the lower longitudinal beam is placed on the top of the support seat (2) for fixing, and then the traction parts between the two positioning frames (5) are connected; Step 2: Then align the upper longitudinal beam with the lower longitudinal beam, and then use the upper pressing plate (401) to position the upper and lower longitudinal beams in the vertical direction, and use the expansion piece on the positioning frame (5) to move the sliding seat (500) to the center position of the upper and lower longitudinal beams. At this time, the second electric push rod (602) pushes the adjustment plate (601) to make the adjustment plate (601) contact the inner walls of the upper and lower longitudinal beams respectively, so that the two sides of the upper and lower longitudinal beams are aligned; Step 3: Before welding, start the traction part to drive the cleaning part to slide between the welding gaps of the upper and lower longitudinal beams to remove the burrs; Step 4: Finally, the upper and lower longitudinal beams are welded by the welding robot arm (101), and then the welded longitudinal beam is taken out by removing the traction member from one of the positioning frames (5).

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