Laser welding seat frame device and working method thereof

Abstract

The invention relates to a laser welding seat frame device and a working method thereof.The laser welding seat frame device comprises a tool assembly fixing frame, a welding tool A and a welding tool B, the welding tool A and the welding tool B are arranged on the tool assembly fixing frame, and an argon arc welding machine and a laser welding machine are arranged behind the tool assembly fixing frame; the welding device is used for welding the workpieces limited on the welding tool A and the welding tool B respectively. The device is simple in structure and reasonable in design, the welding tool A and the welding tool B are arranged to stably limit all workpiece sub-pieces, the welding stability and quality are guaranteed, the workpieces on the welding tool A are welded through the argon arc welding machine, then the welded workpieces on the welding tool A are limited to the welding tool B and welded through the laser welding machine, and the welding efficiency is improved. Welding quality of workpieces is improved, working efficiency is improved, and cost is reduced.

Description

Technical Field

[0001] The invention relates to a laser welding frame device and a working method thereof. Background Art

[0002] With the development of diversified functions of automobile seats, various actuation functions are added to the seats, such as leg support mechanism, ventilation and heating system, control box and wiring harness assembly. Therefore, it is necessary to add corresponding frame mechanism to the frame of the seat, resulting in higher welding requirements between frame sheet metals of the seat. The existing welding of some seat frames generally adopts argon arc welding alone. Argon arc welding is to punch elliptical holes in the upper sheet metal and fully weld it with the lower sheet metal. The disadvantage is that it is impossible to judge whether the weld is fully penetrated from the appearance inspection. Ultrasonic flaw detection is carried out on the first piece on a daily basis, and destructive weld penetration test is carried out regularly. However, when this welding process is found to be defective, many defective products have been produced, which poses a great safety hazard. At the same time, because the seat frame is different from the seat back which is completely covered by the cover, its lower functional part and the contact surface with the body carpet are exposed and need to be electroplated and painted. Since pollutants are easily left at the lower end of the weld when the upper sheet metal is welded by argon arc welding, even after pickling and painting, yellow rust will appear after a period of time; especially when the seat frame is exported as a product, after a long period of sea, land transportation and warehousing, there is a high probability of rust problems; the other part of the seat frame is generally laser welded separately. Since the welding machine needs to carry a laser beam for focusing, its welding gun head is longer and the welding range is limited. It is inconvenient to use and cannot fully weld the arc and narrow position at the lower end of the seat frame. At the same time, the various welding components of the existing seat frame are generally limited by simple fixtures, which easily cause the position of the welding components to shift, resulting in the welded seat frame failing to meet quality requirements. Summary of the invention

[0003] The present invention improves the above-mentioned problem, that is, the technical problem to be solved by the present invention is to provide a laser welding frame device and a working method thereof, which have a simple structure and are easy to use.

[0004] The present invention is constructed as follows: it includes a tool assembly fixing frame and a welding tool A and a welding tool B arranged on the tool assembly fixing frame. A argon arc welder and a laser welder are arranged behind the tool assembly fixing frame to weld the workpieces limited on the welding tool A and the welding tool B respectively.

[0005] Furthermore, the welding tool A includes a welding tool body A and a left positioning mechanism A and a right positioning mechanism A arranged above both sides of the welding tool body A. A front positioning mechanism A and a rear positioning mechanism A are respectively arranged above the front and rear parts of the welding work body A. The left positioning mechanism A, the right positioning mechanism A, the front positioning mechanism A and the rear positioning mechanism A are used to clamp and limit the workpiece.

[0006] Furthermore, the welding tool B includes a welding tool body B and a left positioning mechanism B and a right positioning mechanism B arranged on both sides of the welding tool body B. A front positioning mechanism B and a rear positioning mechanism B are respectively arranged on the front and rear parts of the welding work body B. The left positioning mechanism B, the right positioning mechanism B, the front positioning mechanism B and the rear positioning mechanism B are used to clamp the workpiece and limit it. A front left clamping mechanism B and a front right clamping mechanism B are respectively arranged on both sides of the front part of the welding tool body B, and a rear left clamping mechanism B and a rear right clamping mechanism B are respectively arranged on both sides of the rear part of the welding tool body B.

[0007] Furthermore, the working method of the laser welding seat device includes the following steps: (1) placing a plurality of workpiece components in a welding jig A and limiting their positions, and welding to form a workpiece by an argon arc welding machine; (2) taking the workpiece out of the welding jig A, placing the workpiece and a plurality of workpiece components in the welding jig and limiting their positions, and performing laser wire welding by a laser welding machine, and welding with a protective gas argon to form a workpiece assembly; (3) the welding jig A and the welding jig B work synchronously.

[0008] Compared with the prior art, the present invention has the following beneficial effects: the device has a simple structure and is easy to use. By setting welding fixtures A and B, each workpiece component is stably limited to avoid deviation when each skeleton component is overlapped together, thereby ensuring welding stability and quality; the workpiece on the welding fixture A is welded by an argon arc welding machine, and then the welded workpiece on the welding fixture A is limited together with other workpieces on the welding fixture B and welded by a laser welder. The welding machine can uniformly use 1.0MM wire, and Ar argon gas is uniformly used as the protective gas; the tight fixture fixtures on the welding fixtures A and B are connected with the positioning pins to improve the matching accuracy of the workpieces, and the laser can be used through the elliptical holes in the sheet metal The light beam is easier to focus. By adopting 1.5-2.5KW power laser welding and argon gas intervention, the pollution of oxygen and nitrogen in the air can be avoided, the oxidation caused by high temperature in the welding area can be avoided, the workpiece can be ensured not to be deformed at high temperature, hydrogen cracks can be avoided, and debris in the molten pool can be removed. During the welding process, the heat around the workpiece can be reduced, the area affected by the temperature can be reduced, and the weld can achieve the optimal melting depth. Due to the small number of pollutants, no rust will be generated on the surface regardless of electrophoretic coating or electrostatic powder spraying. Double robot welding can be performed by a single person for cyclic clamping welding, which greatly reduces the investment in manpower and equipment. In addition, the welding tooling can use different part styles, and the same model seat frame can be clamped arbitrarily to achieve standard welding effect and strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 It is a top view of welding tool A and welding tool B according to an embodiment of the present invention; Figure 3This is a schematic diagram of the upper frame structure of an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the upper seat frame of the leg support according to an embodiment of the present invention; Figure 5 A top view of a welding tool A according to an embodiment of the present invention; Figure 6 The left side structure of the welding tool A according to the embodiment of the present invention is shown in FIG. Figure 1 ; Figure 7 The left side structure of the welding tool A according to the embodiment of the present invention is shown in FIG. Figure 2 ; Figure 8 The right side structure of the welding tool A according to the embodiment of the present invention is shown in FIG. Figure 1 ; Fig. 9 The right side structure of the welding tool A according to the embodiment of the present invention is shown in FIG. Figure 2 ; Fig.10 This is a structural schematic diagram of a front positioning mechanism A of a welding tool A according to an embodiment of the present invention; Fig.11 The front positioning mechanism A of the welding tool A according to the embodiment of the present invention is shown in FIG. Figure 1 ; Fig.12 The front positioning mechanism A of the welding tool A according to the embodiment of the present invention is shown in FIG. Figure 2 ; Fig.13 A top view of a welding tool A for installing an upper frame according to an embodiment of the present invention; Fig.14 A top view of a welding tool A for installing an upper seat frame of a leg support according to an embodiment of the present invention; Fig.15 An exploded view of a seat frame assembly according to an embodiment of the present invention; Fig.16 It is a schematic diagram of a seat frame assembly according to an embodiment of the present invention; Fig.17 An exploded view of a leg support frame assembly according to an embodiment of the present invention; Fig.18 This is a schematic diagram of a leg support frame assembly according to an embodiment of the present invention; Fig.19 A top view of a welding tool B according to an embodiment of the present invention; Fig. 20 A partial top view of a welding tool B according to an embodiment of the present invention; Fig.21 The right side structure of the welding tool B according to the embodiment of the present invention is shown in FIG. Figure 1 ; Fig. 22 The right side structure of the welding tool B according to the embodiment of the present invention is shown in FIG. Figure 2 ; Fig.23 The left side structure of the welding tool B according to the embodiment of the present invention is shown in FIG. Figure 1 ; Fig.24 The left side structure of the welding tool B according to the embodiment of the present invention is shown in FIG. Figure 2 ; Fig.25 It is a schematic diagram of the front left clamping mechanism and the rear left clamping mechanism of an embodiment of the present invention; Fig.26 It is a schematic diagram of the front right clamping mechanism and the rear right clamping mechanism of an embodiment of the present invention; Fig. 27 This is a schematic diagram of the structure of the rear left clamping mechanism according to an embodiment of the present invention; Fig.28 This is a schematic diagram of the installation of the rear left clamping mechanism according to an embodiment of the present invention; Fig.29 This is a structural schematic diagram of a front positioning mechanism B of a welding tool B according to an embodiment of the present invention; Fig.30 This is a schematic structural diagram of a front positioning mechanism B and a rear positioning mechanism B of a welding tool B according to an embodiment of the present invention; Fig.31 This is a schematic diagram of the installation of the front pipe rack subassembly according to an embodiment of the present invention; Fig.32 This is a schematic diagram of the installation of the front pipe frame of the leg support according to an embodiment of the present invention; Fig.33 Schematic diagram of front sheet metal installation in the embodiment of the present invention Figure 1 ; Fig.34 Schematic diagram of front sheet metal installation in the embodiment of the present invention Figure 2 ; Fig.35 This is a top view of the leg support frame of the embodiment of the present invention being generally installed on the welding tool B; Fig.36 This is a top view of the seat frame assembly installed on the welding tool B according to the embodiment of the present invention; Fig.37 It is a partial working schematic diagram of the laser welding machine according to an embodiment of the present invention. DETAILED DESCRIPTION

[0010] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0011] Example 1: Figures 1 to 37 As shown, in this embodiment, a laser welding frame device is provided, including a tool assembly fixing frame 1 and welding tool A4 and welding tool B5 arranged on the tool assembly fixing frame, and an argon arc welder 112 and a laser welder 113 are arranged behind the tool assembly fixing frame. The argon arc welder is used to weld the workpiece limited on the welding tool A, and the laser welder is used to weld the workpiece on the welding tool B.

[0012] In an embodiment of the present invention, the device can be used to make two workpieces, workpiece one is a seat frame assembly 103, and workpiece two is a leg support seat frame assembly 104; the seat frame assembly 103 is formed by welding the right side plate 7, the left side plate 8, the front pipe frame small assembly 9, and the rear pipe frame 10 into an upper seat frame 6 in a welding tool A4, and then welding the upper seat frame 6 with the front leg frame 88 (front leg frame 71), the front leg frame 89, the rear leg frame 86, and the rear leg frame 87; the leg support seat frame assembly 10 is formed by welding the right side plate 7, the left side plate 12, the leg support front pipe frame 13, and the rear pipe frame 10 into a leg support upper seat frame 11 in a welding tool A4, and then welding the leg support upper seat frame 11 with the front leg frame 88 (front leg frame 71), the front leg frame 89, the rear leg frame 86, and the rear leg frame 87.

[0013] In the embodiment of the present invention, the welding tool A4 is mainly used to weld the upper seat frame 6 or the leg rest upper seat frame 11. When welding the upper seat frame 6, the upper seat frame 6 is composed of a right side plate 7, a left side plate 8, a front pipe frame subassembly 9, and a rear pipe frame 10. When welding the leg rest upper seat frame 11, the leg rest upper seat frame 11 is composed of a right side plate 7, a left side plate 12, a leg rest front pipe frame 13, and a rear pipe frame 10. The left side plate 12 can be further increased with a sheet metal fixing plate and an ECU control box can be added according to the vehicle body configuration requirements. The leg rest front pipe frame 13 can be increased with a leg support mechanism according to the vehicle body configuration requirements to adjust the leg comfort of the co-driver.

[0014] The welding tool A4 includes a welding tool body A and a left positioning mechanism A and a right positioning mechanism A arranged above both sides of the welding tool body A. A front positioning mechanism A and a rear positioning mechanism A are respectively arranged above the front and rear parts of the welding work body A. The left positioning mechanism A, the right positioning mechanism A, the front positioning mechanism A and the rear positioning mechanism A are used to clamp and limit the workpiece.

[0015] The left positioning mechanism A is used to limit the left side plate 8 or the left side plate 12, the right positioning mechanism A is used to limit the right side plate 7, the front positioning mechanism A is used to limit the front pipe rack subassembly 9 or the leg support front pipe rack 13, and the rear positioning mechanism A is used to limit the rear pipe rack 10.

[0016] The above-mentioned left positioning mechanism A includes a left fixed plate A14 arranged above the welding tool body A, and a left positioning pin A18 and a left positioning pin B19 are arranged at the front and rear of the middle part of the left fixed plate A, and a left clamping mechanism A20 and a left clamping mechanism B21 for clamping the workpiece are respectively arranged at the front and rear parts of the left fixed plate A, and the left clamping mechanism A and the left clamping mechanism B both include a left clamping jaw A and a left clamping jaw cylinder A for driving the left clamping jaw A to swing; the left fixed plate A is connected to the tool assembly fixed frame via two slide rails A, and the two slide rails A include a first slide rail A24 and a second slide rail A25, and the slide rail A is fixed to the surface of the tool assembly fixed frame, and a slide groove for matching with the slide rail A is arranged below the left fixed plate A, and the left fixed plate A is driven by a left top cylinder A22 to move left and right along the slide rail A. The left clamping mechanism A and the left clamping mechanism B are existing technologies. The left clamping jaw cylinder A is fixed to a cylinder mounting seat. The left clamping jaw A and the left clamping jaw cylinder A are hinged. The cylinder mounting seat and the left clamping jaw A are connected via a connecting rod. The two ends of the connecting rod are hinged to the cylinder mounting seat and the left clamping jaw A respectively. Each clamping mechanism also has the same structure as the left clamping mechanism A.

[0017] The left locating pin A and the right locating pin A are used to fix the left side plate 12 or the left side plate 8, and the holes of the left side plate 12 or the left side plate 8 cooperate with the left locating pin A and the right locating pin, and then the left side plate 12 or the left side plate is clamped by the left clamping mechanism A20 and the left clamping mechanism B21.

[0018] A hand push clamp structure A is arranged in front of the left fixed plate A. The hand push clamp mechanism A23 includes a hand push clamp fixed plate A, a hand push clamp handle A and a hand push clamp short rod A. The lower end of the hand push clamp handle A is hinged to the hand push clamp fixed plate A, the middle part of the hand push clamp handle A is hinged to the hand push clamp short rod A, the other end of the hand push clamp short rod A is hinged to the left fixed plate A, and the hand push clamp fixed plate A is fixed on the tooling assembly fixing frame.

[0019] Because the volume of the deposited metal shrinks during the process of changing from liquid to solid during welding, which causes tension in the metal, thereby causing the metal to move toward the weld and cause certain deformation. By setting up the hand-push clamp structure A, manual intervention can be made to open the clamp by the auxiliary mechanism to remove the workpiece.

[0020] The right positioning mechanism has the same structure as the left positioning mechanism and is symmetrically arranged; the above-mentioned right positioning mechanism A includes a right fixed plate A15 arranged above the welding tool body A, and a right positioning pin A26 and a right positioning pin B27 are arranged at the front and rear of the middle part of the right fixed plate A, and a right clamping mechanism A28 and a right clamping mechanism B29 are respectively arranged at the front and rear parts of the left fixed plate A for clamping the workpiece, and the right clamping mechanism A and the right clamping mechanism B both include a right clamping jaw A and a right clamping jaw cylinder A for driving the right clamping jaw A to swing; the right fixed plate A is connected to the tool assembly fixed frame via two slide rails B, and the two slide rails B include a first slide rail B32 and a second slide rail B33, and the slide rail B is fixed to the surface of the tool assembly fixed frame, and a slide groove for matching with the slide rail B is arranged below the right fixed plate A, and the right fixed plate A is driven by the right top cylinder A30 to move left and right along the slide rail B; The right positioning pin A26 and the right positioning pin B27 are matched with the holes on the right side plate, and then the right clamping mechanism A and the right clamping mechanism B are used to clamp the right side plate.

[0021] A hand push clamp structure D31 is arranged in front of the right fixed plate A. The hand push clamp mechanism D31 includes a hand push clamp fixed plate D, a hand push clamp handle D and a hand push clamp short rod D. The lower end of the hand push clamp handle D is hinged to the hand push clamp fixed plate D, the middle part of the hand push clamp handle D is hinged to the hand push clamp short rod D, the other end of the hand push clamp short rod A is hinged to the left fixed plate D, and the hand push clamp fixed plate D is fixed on the tooling assembly fixing frame.

[0022] Because the volume of the deposited metal shrinks when it changes from liquid to solid during welding, which causes tension in the metal, causing the metal to move toward the weld and cause certain deformation. By setting up the hand-pushing clamp structure D, manual intervention can be made to open the auxiliary mechanism to remove the workpiece.

[0023] The above-mentioned rear positioning mechanism A includes a rear pipe rack positioning block A16, a rear pipe rack positioning groove A is arranged above the rear pipe rack positioning block A, and a rear pipe rack clamping mechanism A17 is arranged in front of the rear pipe rack positioning A for pressing the workpiece on the rear pipe rack positioning groove A; the rear pipe rack clamping mechanism A includes a rear pipe rack clamping claw A and a rear pipe rack clamping claw cylinder A for driving the rear pipe rack clamping claw A to swing.

[0024] The rear pipe rack positioning block A16 is used to fix the rear pipe rack 10. When the rear pipe rack is inserted into the left side plate from the side, the pipe body of the rear pipe rack is located in the rear pipe rack positioning groove A and then clamped by the rear pipe rack clamping mechanism A.

[0025] The above-mentioned front positioning mechanism A includes a front fixing frame A and a front positioning pin A35, a front positioning pin B36 and a front positioning pin C37 arranged on the front fixing frame A, a front positioning block A34 is arranged at the rear of the front fixing frame A, a front clamping mechanism A38 is arranged at the rear of the front positioning block A, and a front clamping mechanism B40 and a front clamping mechanism C39 are arranged in front of the front positioning pin A and the front positioning pin B respectively; the front clamping mechanisms A, B, and C all include a front clamping jaw A and a front clamping jaw cylinder A for driving the front clamping jaw A to swing and clamp the workpiece.

[0026] The front pipe rack subassembly 9 and the leg support front pipe rack 13 are fixed by the front locating pin A35, the front locating pin B36 and the front locating pin C37, and then clamped by the front clamping mechanism A38, the front clamping mechanism C39 and the front clamping mechanism B40; when installing the front pipe rack subassembly 9, it is positioned by the front locating pin A35, and when installing the leg support front pipe rack 13, it is positioned by the front locating pin B36 and the front locating pin C37.

[0027] In an embodiment of the present invention, the welding tool B5 is mainly used for welding the upper seat frame 6 or the leg support upper seat frame 11 and the front leg frame 88 (front leg frame 71), the front leg frame 89, the rear leg frame 86, and the rear leg frame 87, wherein the front leg frame 88 is provided with a function to add a wiring harness assembly to fix the sheet metal according to the vehicle body configuration.

[0028] The welding tool B5 includes a welding tool body B and a left positioning mechanism B and a right positioning mechanism B arranged on the upper sides of the welding tool body B. A front positioning mechanism B and a rear positioning mechanism B are respectively arranged on the front and rear parts of the welding work body B. The left positioning mechanism B, the right positioning mechanism B, the front positioning mechanism B and the rear positioning mechanism B are used to clamp and limit the workpiece. A front left clamping mechanism B and a front right clamping mechanism B are respectively arranged on both sides of the front part of the welding tool body B, and a rear left clamping mechanism B and a rear right clamping mechanism B are respectively arranged on both sides of the rear part of the welding tool body B.

[0029] The above-mentioned left positioning mechanism B includes a left fixed plate B41 and a left positioning pin fixing mechanism B65, a left positioning pin C63 and a left positioning pin D64 arranged on the inner side of the left fixed plate B. The left positioning pin fixing mechanism B, the left positioning pin C and the left positioning pin D are arranged in sequence from front to back along the left fixed plate. The left positioning pin fixing mechanism B includes a left movable positioning pin B and a left movable positioning pin top cylinder B for driving the left movable positioning pin B to extend and retract. The left fixed plate B is provided with a left clamping mechanism C66 and a left clamping mechanism D67 for clamping the workpiece. The left clamping mechanism C and the left clamping mechanism D both include a left clamping jaw C and a left clamping jaw cylinder C for driving the left clamping jaw C to swing. The left positioning mechanism is used to limit the left side of the upper seat frame 6 or the leg support upper seat frame 11, the left positioning pin fixing mechanism B65, the left positioning pin C63 and the left positioning pin D64 are used to position the upper seat frame 6 or the leg support upper seat frame 11, and the left clamping mechanism C66 and the left clamping mechanism D67 are used to clamp the left side of the upper seat frame 6 and the left side of the leg support upper seat frame 11.

[0030] The left fixed plate B is connected to the tooling assembly fixed frame via two slide rails C, and the two slide rails C include a first slide rail C69 and a second slide rail C70. The first slide rail C69 and the second slide rail C70 can increase the friction and stability of the mechanism. The slide rail C is fixed to the surface of the tooling assembly fixed frame, and a slide groove C is provided below the left fixed plate B to cooperate with the slide rail C. The left fixed plate B is driven by the left top cylinder C62 to move left and right along the slide rail C; a hand push clamp structure B68 is provided on the outer side of the left fixed plate B, and the hand push clamp mechanism B includes a hand push clamp fixed plate B, a hand push clamp push handle B and a hand push clamp short rod B. The lower end of the hand push clamp push handle B is hinged to the hand push clamp fixed plate B, the middle part of the hand push clamp push handle B is hinged to the hand push clamp short rod B, and the other end of the hand push clamp short rod B is hinged to the left fixed plate B, and the hand push clamp fixed plate B is fixed to the tooling assembly fixed frame.

[0031] Because the volume of the deposited metal shrinks when it changes from liquid to solid during welding, which causes tension in the metal, causing the metal to move toward the weld and cause certain deformation. By setting up the hand-push clamp structure B, manual intervention can be made to open the auxiliary mechanism to remove the workpiece.

[0032] The above-mentioned right positioning mechanism B includes a right fixed plate B42 and a right positioning pin fixing mechanism 1 57, a right positioning pin fixing mechanism 2 57, a right positioning pin C51 and a right positioning pin D52 arranged on the inner side of the right fixed plate B, the right positioning pin fixing mechanism 1 and the right positioning pin fixing mechanism 2 both include a right movable positioning pin 56 and a right movable positioning pin top cylinder B55 for driving the right movable positioning pin to extend and retract; the right fixed plate B is provided with a right clamping mechanism C59, a right clamping mechanism D53 and a right clamping mechanism E54 for clamping the workpiece, the right clamping mechanism C, the right clamping mechanism D and the right clamping mechanism E all include a right clamping jaw C and a right clamping jaw cylinder C for driving the right clamping jaw C to swing; The right positioning mechanism is used to limit the right side of the upper seat frame 6 or the leg support upper seat frame 11, the right positioning pin fixing mechanism 1 57, the right positioning pin fixing mechanism 2 57, the right positioning pin C51 and the right positioning pin D52 are used to position the upper seat frame 6 or the leg support upper seat frame 11, and the right clamping mechanism C59, the right clamping mechanism D53 and the right clamping mechanism E54 are used to clamp the upper seat frame 6 or the right side of the leg support upper seat frame 11.

[0033] The right fixed plate B is connected to the tooling assembly fixed frame via two slide rails D, and the two slide rails D include a first slide rail D60 and a second slide rail D61. The first slide rail D60 and the second slide rail D61 can increase the friction and stability of the mechanism. The slide rail D is fixed to the surface of the tooling assembly fixed frame. A slide groove D for matching with the slide rail D is provided below the left fixed plate B. The right fixed plate B is driven by a right top cylinder C50 provided on the outer side of the right fixed plate B to move left and right along the slide rail D. A hand push clamp structure C58 is provided on the outer side of the right fixed plate B. The hand push clamp mechanism C includes a hand push clamp fixed plate C, a hand push clamp handle C and a hand push clamp short rod C. The lower end of the hand push clamp handle C is hinged to the hand push clamp fixed plate C, the middle part of the hand push clamp handle C is hinged to the hand push clamp short rod C, and the other end of the hand push clamp short rod C is hinged to the right fixed plate B. The hand push clamp fixed plate C is fixed to the tooling assembly fixed frame.

[0034] The above-mentioned front positioning mechanism B49 includes a front frame and positioning pin 1 90, positioning pin 2 91, positioning pin 3 92, positioning pin 4 95, positioning pin 5 100, and positioning pin 6 101 arranged on the front frame. The positioning pin 4 and positioning pin 5 are driven to retract and retract by a positioning pin top cylinder 94 obliquely arranged at the lower part. The rear part of the front frame is provided with a clamping mechanism 1 96 and a clamping mechanism 2 98 for clamping the workpiece; the clamping mechanism 1 and the clamping mechanism 2 both include a front clamp B and a front clamp B cylinder for driving the front clamp B to swing and clamp.

[0035] The front positioning mechanism B49 is used to fix the front tube frame subassembly 9 of the upper seat frame 6 or the overlap and fixation of the leg support upper seat frame 11, the leg support front tube frame 13 and the front sheet metal 102; wherein the positioning pin two 91 and the positioning pin three 92 are used to fix the front tube frame subassembly 9 of the upper seat frame 6, and the positioning pin one 90 is used to fix the leg support front tube frame 13 of the leg support upper seat frame 11, and the specific replacement configuration is carried out according to the optional vehicle model; the positioning pin four 95 and the positioning pin five 100 are used to fix the front sheet metal 102, and the positioning pin six 101 is used to fix the ventilation sheet metal mounting hole at the rear end of the front sheet metal 102; the clamping mechanism one 96 and the clamping mechanism two 98 are used to clamp the sheet metal 102.

[0036] The rear positioning mechanism B includes a rear pipe rack positioning block B43 and a rear pipe rack positioning block B groove arranged above the rear pipe rack positioning block B, and a rear pipe rack B clamping mechanism 44 is arranged behind the rear pipe rack positioning block B; the rear pipe rack B clamping mechanism includes a rear pipe rack B clamping claw and a rear pipe rack B clamping cylinder for driving the rear pipe rack B clamping claw to swing and clamp the workpiece.

[0037] The rear pipe rack positioning block B43 of the rear positioning mechanism B is used to fix the rear pipe rack 10, which is fixed by the rear pipe rack B clamping mechanism B44.

[0038] In the embodiment of the present invention, the front left clamping mechanism B45 includes a front left leg frame positioning block B75 and two front left leg frame fixing pins 751 arranged on the front left leg frame positioning block B, and a front left leg frame clamping mechanism 73 for clamping a workpiece is arranged beside the front left leg frame positioning block B; The front left clamping mechanism B45 is mainly used to fix the front tripod 88. The two front left tripod fixing pins 751 cooperate with the holes of the front tripod 88 and are then clamped by the front left tripod clamping mechanism.

[0039] The rear left clamping mechanism B46 includes a rear left leg positioning block B72 and two rear left leg movable pins arranged on the rear left leg positioning block B, the two rear left leg movable pins include a rear left leg movable pin 1 84 and a rear left leg movable pin 2 85, the two rear left leg movable pins are driven to extend and retract by a rear left leg movable pin cylinder, and a rear left leg clamping mechanism for clamping a workpiece is arranged in front and rear of the rear left leg positioning block B; the two rear left leg clamping mechanisms include a rear left leg clamping mechanism 1 74 and a rear left leg clamping mechanism 2 83.

[0040] The rear left clamping mechanism B46 is mainly used to fix the rear tripod 86, and cooperates with the hole position of the rear tripod 86 through the left tripod movable pin 1 84 and the rear left tripod movable pin 2 85, and then clamped by the rear left tripod clamping mechanism 1 74 and the rear left tripod clamping mechanism 2 83.

[0041] The front right clamping mechanism B47 includes a front right positioning block B79 and a contoured positioning groove arranged on the front right positioning block B. Two front right cylinder mechanisms for limiting the workpiece are arranged on the side of the front right positioning block B. The two front right cylinder mechanisms include a front right cylinder mechanism 1 80 and a front right cylinder mechanism 2 82. The front right cylinder mechanism includes a front right positioning pin and a front right cylinder for driving the front right positioning pin to extend and retract. The front right clamping mechanism B47 is mainly used to fix the front leg frame 89, place the front leg frame 89 in the contoured positioning groove on the front right positioning block B, and then limit the position through the front right top cylinder mechanism 1 80 and the front right top cylinder mechanism 2 82.

[0042] The structure of the rear right leg movable pin is the same as that of the rear left clamping mechanism. The rear right clamping mechanism B48 includes a rear right leg positioning block B76 and two rear right leg movable pins arranged on the rear right leg positioning block B. The two rear right leg movable pins include a rear right leg movable pin one and a rear right leg movable pin two. The two rear right leg movable pins are driven to retract by a rear right leg movable pin cylinder. A rear right leg clamping mechanism for clamping a workpiece is arranged in front and rear of the rear right leg positioning block B; the two rear right leg clamping mechanisms include a rear right leg clamping mechanism one 77 and a rear right leg clamping mechanism two 78; the front left leg clamping mechanism, the rear left leg clamping mechanism and the rear right leg clamping mechanism all include a leg clamping claw and a leg clamping claw cylinder for driving the leg clamping claw to swing and clamp the workpiece.

[0043] The rear right clamping mechanism B48 is mainly used to fix the rear tripod 87.

[0044] In an embodiment of the present invention, three control valves 105 are provided on the welding tool body A of the welding tool A4, which are used to respectively control the clamping or unlocking of each clamping mechanism of the welding tool A4; four control valves 108 are provided on the welding tool body B of the welding tool B5, which are used to control the clamping or unlocking of each clamping mechanism of the welding tool B5.

[0045] In an embodiment of the present invention, a laser welder 113 uses laser wire welding to focus a laser beam 114 on a welding point 117. A high-energy-density laser beam heats and melts the opening of the front sheet metal 102 and the molten pool on the surface of the left plate 8, and then fills the wire into the wire feeding mechanism 116 for welding. The optimal welding effect is achieved by the intervention of argon gas 115, which is a protective gas. The advantage is that a relatively low-power laser can weld thicker workpieces. The intervention of argon gas can avoid the contamination of oxygen and nitrogen in the air, avoid oxidation caused by high temperature in the welding area, ensure that the workpiece does not deform at high temperature, avoid the generation of hydrogen cracks, and remove debris in the molten pool. Welds 117, 118, 119, and 120 are important welds for welding the front sheet metal 102 with the left plate 8 and the right plate 7.

[0046] In an embodiment of the present invention, when manufacturing the seat frame assembly 103: by limiting the right side plate 7, the left side plate 8, the front pipe rack subassembly 9, and the rear pipe rack 10 in the welding tool A4, the upper seat frame 6 is formed by welding through the argon arc welding machine 112; the upper seat frame 6 is taken out, and the upper seat frame 6, the front leg frame 88 (front leg frame 71), the front leg frame 89, the rear leg frame 86, the rear leg frame 87, and the front sheet metal 102 are respectively limited to the corresponding positions of the welding tool B, and then laser wire welding is performed by a laser welder, and the optimal welding effect is achieved with the protective gas argon, and the seat frame assembly 103 is taken out.

[0047] When manufacturing the leg support frame assembly 104: by limiting the right side plate 7, the left side plate 12, the leg support front pipe frame 13, and the rear pipe frame 10 in the welding tool A4, the leg support upper frame 11 is formed by welding with the argon arc welding machine 112; the leg support upper frame 11 is taken out, and the leg support upper frame 11, the front leg frame 88 (front leg frame 71), the front leg frame 89, the rear leg frame 86, the rear leg frame 87, and the front sheet metal 102 are respectively limited to the corresponding positions of the welding tool B, and then laser wire welding is performed with a laser welder, and the optimal welding effect is achieved with the protective gas argon, and the leg support frame assembly 104 is taken out.

[0048] Embodiment 2: On the basis of embodiment 1, in the embodiment of the present invention, take the welding seat frame assembly 103 as an example: take the left side plate 8 and install it into the left positioning pin A18 and the left positioning pin B19 on the left side fixing plate 14 of the welding tool A4, take the left side of the rear pipe rack 10 and insert it into the left side plate 8 and place the rear pipe rack positioning block A16 in the rear pipe rack positioning groove A for fixing, take the front pipe rack small assembly 9 and place it at the front positioning mechanism A for fixing, take the right side plate 7 and install it into the right positioning pin A26 and the right positioning pin B27 on the upper end of the right side fixing plate 15 of the welding tool A4 for fixing, drive the left top cylinder A22 and the right top cylinder A30 to respectively drive the left fixing plate 14 and the right fixing plate 15 to retract and return to their original positions, and move the rear pipe rack 10 and the front pipe rack small assembly 9 to the left side plate 8 and the left fixing plate 14 and the right fixing plate 15 to retract and return to their original positions, and move the rear pipe rack 10 and the front pipe rack small assembly 9 to the front positioning mechanism A for fixing. Assembly 9 is clamped, left clamping mechanism A20 and left clamping mechanism B21 clamp left side plate 8, right clamping mechanism A and right clamping mechanism B clamp right side plate 7, front clamping mechanism A38, front clamping mechanism C39, front clamping mechanism B40 clamp front pipe rack small assembly 9, rear pipe rack clamping mechanism A17 clamps rear pipe rack 10; after the engineering is clamped, start the switch argon arc welding machine 112 to start welding, and after welding is completed, the three mechanical valves are opened in sequence. During the welding process, the volume of the deposited metal will shrink from liquid to solid, which will cause the metal to generate tension, thereby causing the metal to move toward the weld direction, causing certain deformation, and respectively actuating the hand-pushing clamping structures A and D to assist the left fixed plate 14 and the right Unclamp the fixing plate 15 and take out the upper frame 6 for standby use; limit the front leg 88 through the front left clamping mechanism B45, the rear leg 86 through the rear left clamping mechanism B46, the front leg 89 through the front right clamping mechanism B47, and the rear leg 87 through the rear right clamping mechanism B48; take the upper frame 6 and place it on the welding fixture B5, limit the upper frame 6 through the left positioning mechanism B, the right positioning mechanism B, the front positioning mechanism B and the rear positioning mechanism B, and install the front sheet metal into the front end of the upper frame 6 and limit it; the welding fixture 4 can continue to install the welding parts of the upper frame 6 to achieve the cyclic production effect of the welding fixture A4 and the welding fixture B5; after the lower engineering is clamped, start the switch laser welding machine 113 to start laser filling Wire welding, through the laser beam 114 focused on the welding point 117, the high energy density laser beam heats and melts the opening of the front sheet metal 102 and the molten pool on the surface of the left plate 8, and then fills the wire of the wire feeding mechanism 116 for welding, and the protective gas 115 argon gas is introduced to achieve the best welding effect. Its advantages are that a relatively low power laser can weld thicker workpieces. The argon gas intervention can avoid the pollution of oxygen and nitrogen in the air, avoid oxidation caused by high temperature in the welding area, ensure that the workpiece does not deform at high temperature, avoid hydrogen cracks, and can also remove debris in the molten pool; welds 117, 118, 119, and 120 are important welds for welding the front sheet metal 102 with the left plate 8 and the right plate 7;After welding is completed, the four mechanical valves are opened in sequence. During the welding process, the volume of the deposited metal shrinks from liquid to solid, which causes the metal to generate tension, thereby causing the metal to move toward the weld, causing a certain deformation. The hand-pushing clamp structure B and the hand-pushing clamp structure C are respectively operated to assist the left fixing plate B41 of the left positioning mechanism B and the right fixing plate B of the right positioning mechanism B to open the clamps and take out the welded seat frame assembly 103. The principle and process of welding the seat frame assembly 103 and the leg support seat frame assembly 104 are the same. ;

[0049] This device uses dual robots with different welding methods. The method is to use argon arc welding for lap jointing of sheet metal and pipe fittings in the upper process (welding welding tool A4 welding upper frame 6 or leg support upper frame 11), and laser wire filling welding for lap jointing of sheet metal and sheet metal in the lower process (welding welding tool B5 welding frame assembly 103 or leg support frame assembly 104). The advantage is that the welding machine can uniformly use 1.0MM welding wire, and Ar argon gas is uniformly used as the shielding gas; the workpiece matching accuracy is improved by tightly connecting the tool fixture with the positioning pin, and the laser beam can be more easily focused through the elliptical hole of the sheet metal, and the 1.5-2.5 KW power laser welding and argon gas intervention can avoid pollution from oxygen and nitrogen in the air, avoid oxidation caused by high temperature in the welding area, ensure that the workpiece does not deform at high temperature, avoid hydrogen cracks, and remove debris in the molten pool; during the welding process, the heat around the workpiece can be reduced, the area affected by the temperature can be reduced, and the weld can achieve the optimal melting depth. Due to the small number of pollutants, no rust will be generated on the surface regardless of electrophoretic coating or electrostatic powder spraying; dual robot welding can be performed by a single person for cyclic clamping welding, greatly reducing manpower and equipment investment; and the welding tooling can use different part styles, and the same model seat frame can be clamped arbitrarily to achieve standard welding effect and strength.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A laser welding frame device, characterized in that: It includes a tool assembly fixing frame and welding tool A and welding tool B arranged on the tool assembly fixing frame. A argon arc welder and a laser welder are arranged behind the tool assembly fixing frame to weld each workpiece limited on the welding tool A and the welding tool B respectively.

2. A laser welding frame device according to claim 1, characterized in that: The welding tool A includes a welding tool body A and a left positioning mechanism A and a right positioning mechanism A arranged above both sides of the welding tool body A. A front positioning mechanism A and a rear positioning mechanism A are respectively arranged above the front and rear parts of the welding work body A. The left positioning mechanism A, the right positioning mechanism A, the front positioning mechanism A and the rear positioning mechanism A are used to clamp and limit the workpiece.

3. A laser welding frame device according to claim 2, characterized in that: The left positioning mechanism A comprises a left fixed plate A arranged above the welding tool body A, a left positioning pin A and a left positioning pin B are arranged at the front and rear of the middle part of the left fixed plate A, a left clamping mechanism A and a left clamping mechanism B are arranged at the front and rear of the left fixed plate A for clamping the workpiece, respectively, and the left clamping mechanism A and the left clamping mechanism B both comprise a left clamping jaw A and a left clamping jaw cylinder A for driving the left clamping jaw A to swing; the left fixed plate A is connected to the tool assembly fixing frame via two slide rails A, and the slide rails A are fixed to the surface of the tool assembly fixing frame, and a left fixed plate A is arranged below the left fixed plate A. There is a slide groove for cooperating with the slide rail A, and the left fixed plate A is driven by the left top cylinder A to move left and right along the slide rail A; a hand push clamp structure A is arranged in front of the left fixed plate A, and the hand push clamp mechanism A includes a hand push clamp fixed plate A, a hand push clamp push handle A and a hand push clamp short rod A, the lower end of the hand push clamp push handle A is hinged to the hand push clamp fixed plate A, the middle part of the hand push clamp push handle A is hinged to the hand push clamp short rod A, the other end of the hand push clamp short rod A is hinged to the left fixed plate A, and the hand push clamp fixed plate A is fixed on the tooling assembly fixing frame; the right positioning mechanism has the same structure as the left positioning mechanism.

4. A laser welding frame device according to claim 2, characterized in that: The front positioning mechanism A comprises a front fixing frame A and a front positioning pin A, a front positioning pin B and a front positioning pin C arranged on the front fixing frame A; a front positioning block A is arranged behind the front fixing frame A; a front clamping mechanism A is arranged behind the front positioning block A; a front clamping mechanism B and a front clamping mechanism C are arranged in front of the front positioning pin A and the front positioning pin B, respectively; the front clamping mechanisms A, B and C all comprise a front clamping jaw A and a front clamping jaw cylinder A for driving the front clamping jaw A to swing and clamp the workpiece; the rear positioning mechanism A comprises a rear pipe rack positioning block A; a rear pipe rack positioning groove A is arranged above the rear pipe rack positioning block A; a rear pipe rack clamping mechanism A for clamping the workpiece on the rear pipe rack positioning groove A is arranged in front of the rear pipe rack positioning A; the rear pipe rack clamping mechanism A comprises a rear pipe rack clamping jaw A and a rear pipe rack clamping jaw cylinder A for driving the rear pipe rack clamping jaw A to swing.

5. A laser welding frame device according to claim 1, characterized in that: The welding tool B includes a welding tool body B and a left positioning mechanism B and a right positioning mechanism B arranged on the upper sides of the welding tool body B. A front positioning mechanism B and a rear positioning mechanism B are respectively arranged on the front and rear parts of the welding work body B. The left positioning mechanism B, the right positioning mechanism B, the front positioning mechanism B and the rear positioning mechanism B are used to clamp and limit the workpiece. A front left clamping mechanism B and a front right clamping mechanism B are respectively arranged on both sides of the front part of the welding tool body B, and a rear left clamping mechanism B and a rear right clamping mechanism B are respectively arranged on both sides of the rear part of the welding tool body B.

6. A laser welding frame device according to claim 5, characterized in that: The left positioning mechanism B includes a left fixed plate B and a left positioning pin fixing mechanism B, a left positioning pin C and a left positioning pin D arranged on the inner side of the left fixed plate B. The left positioning pin fixing mechanism B, the left positioning pin C and the left positioning pin D are arranged in sequence from front to back along the left fixed plate. The left positioning pin fixing mechanism B includes a left movable positioning pin B and a left movable positioning pin top cylinder B for driving the left movable positioning pin B to extend and retract. The left fixed plate B is provided with a left clamping mechanism C and a left clamping mechanism D for clamping the workpiece. The left clamping mechanism C and the left clamping mechanism D both include a left clamping claw C and a left clamping claw cylinder C for driving the left clamping claw C to swing. The left fixed plate B and The tooling assembly fixing frames are connected via two slide rails C, and the slide rails C are fixed to the surface of the tooling assembly fixing frame. A slide groove C for matching with the slide rail C is provided under the left fixing plate B, and the left fixing plate B is driven by the left top cylinder C to move left and right along the slide rail C; a hand push clamp structure B is provided on the outer side of the left fixing plate B, and the hand push clamp mechanism B includes a hand push clamp fixing plate B, a hand push clamp handle B and a hand push clamp short rod B. The lower end of the hand push clamp handle B is hinged to the hand push clamp fixing plate B, the middle part of the hand push clamp handle B is hinged to the hand push clamp short rod B, and the other end of the hand push clamp short rod B is hinged to the left fixing plate B, and the hand push clamp fixing plate B is fixed to the tooling assembly fixing frame.

7. A laser welding frame device according to claim 5, characterized in that: The right positioning mechanism B includes a right fixed plate B and a right positioning pin fixing mechanism 1, a right positioning pin fixing mechanism 2, a right positioning pin C and a right positioning pin D arranged on the inner side of the right fixed plate B. The right positioning pin fixing mechanism 1 and the right positioning pin fixing mechanism 2 both include a right movable positioning pin and a right movable positioning pin top cylinder B for driving the right movable positioning pin to extend and retract; the right fixed plate B is provided with a right clamping mechanism C, a right clamping mechanism D and a right clamping mechanism E for clamping the workpiece, and the right clamping mechanism C, the right clamping mechanism D and the right clamping mechanism E all include a right clamping claw C and a right clamping claw cylinder C for driving the right clamping claw C to swing; the right fixed plate B and the tooling assembly fixing frame are connected. They are connected via two slide rails D, which are fixed to the surface of the tooling assembly fixing frame. A slide groove D for matching with the slide rail D is provided under the left fixed plate B. The right fixed plate B is driven by a right top cylinder C provided on the outer side of the right fixed plate B to move left and right along the slide rail D. A hand push clamp structure C is provided on the outer side of the right fixed plate B, and the hand push clamp mechanism C includes a hand push clamp fixing plate C, a hand push clamp handle C and a hand push clamp short rod C. The lower end of the hand push clamp handle C is hinged to the hand push clamp fixing plate C, the middle part of the hand push clamp handle C is hinged to the hand push clamp short rod C, and the other end of the hand push clamp short rod C is hinged to the right fixed plate B. The hand push clamp fixing plate C is fixed to the tooling assembly fixing frame.

8. A laser welding frame device according to claim 5, characterized in that: The front positioning mechanism B includes a front frame and positioning pins 1, 2, 3, 4, 5 and 6 arranged on the front frame. The positioning pins 4 and 5 are driven to extend and retract by positioning pin top cylinders obliquely arranged at the lower part. The rear part of the front frame is provided with a clamping mechanism 1 and a clamping mechanism 2 for clamping the workpiece; the clamping mechanism 1 and the clamping mechanism 2 both include a front clamping jaw B and a front clamping jaw B cylinder for driving the front clamping jaw B to swing and clamp; the rear positioning mechanism B includes a rear pipe rack positioning block B and a rear pipe rack positioning block B groove arranged above the rear pipe rack positioning block B, and a rear pipe rack B clamping mechanism is arranged behind the rear pipe rack positioning block B; the rear pipe rack B clamping mechanism includes a rear pipe rack B clamping jaw and a rear pipe rack B clamping cylinder for driving the rear pipe rack B clamping jaw to swing and clamp the workpiece.

9. A laser welding frame device according to claim 5, characterized in that: The front left clamping mechanism B includes a front left tripod positioning block B and two front left tripod fixing pins arranged on the front left tripod positioning block B, and a front left tripod clamping mechanism for clamping a workpiece is arranged beside the front left tripod positioning block B; the rear left clamping mechanism B includes a rear left tripod positioning block B and two rear left tripod movable pins arranged on the rear left tripod positioning block B, and the two rear left tripod movable pins are driven to retract by the rear left tripod movable pin cylinder, and a rear left tripod clamping mechanism for clamping a workpiece is arranged in front and behind the rear left tripod positioning block B; the front right clamping mechanism B includes a front right positioning block B and a contoured positioning groove arranged on the front right positioning block B, and the front right Two front right push cylinder mechanisms for limiting the workpiece are arranged on the side of the positioning block B, and the front right push cylinder mechanism includes a front right positioning pin and a front right push cylinder for driving the front right positioning pin to extend and retract; the rear right clamping mechanism B includes a rear right leg frame positioning block B and two rear right leg frame movable pins arranged on the rear right leg frame positioning block B, and the two rear right leg frame movable pins are driven to extend and retract by the rear right leg frame movable pin cylinder, and a rear right leg frame clamping mechanism for clamping the workpiece is arranged in front and rear of the rear right leg frame positioning block B; the front left leg frame clamping mechanism, the rear left leg frame clamping mechanism and the rear right leg frame clamping mechanism all include a leg frame clamping claw and a leg frame clamping claw cylinder for driving the leg frame clamping claw to swing and clamp the workpiece.

10. The working method of a laser welding frame device according to claim 1, characterized in that: The method comprises the following steps: (1) placing a plurality of workpiece parts in a welding jig A and limiting their positions, and welding the workpieces by an argon arc welding machine; (2) taking the workpiece out of the welding jig A, placing the workpiece and a plurality of workpiece parts in the welding jig and limiting their positions, and performing laser wire welding by a laser welding machine, and welding with argon as a protective gas to form a workpiece assembly; (3) the welding jig A and the welding jig B work synchronously.

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