Plasma welding device and method for body bottom panel assembly

Abstract

The present invention provides a vehicle body floor assembly plasma welding device and method, the welding device includes a fixing mechanism, a manipulator a, a first assembly mechanism, a first plasma welding mechanism, and a transmission mechanism are provided on one side of the fixing mechanism, a second assembly mechanism and a second plasma welding mechanism are provided on the transmission mechanism; the first plasma welding mechanism includes a track provided in the air. The present invention drives the welding head a to move to weld the two horizontal sides of the support beam and the bottom beam, and uses the welding head b to weld the two vertical sides of the support beam and the bottom beam, thereby enhancing the welding effect between the support beam and the bottom beam; after the bolts screwed into the threaded holes are disassembled into the hexagonal grooves of the rotating caps by the first assembly mechanism, the welding head a is driven to extend into the avoidance groove to weld the circular holes and the threaded hole areas, thereby enhancing the welding effect between the support beam and the bottom beam, and compared with manual welding, the operation is simple and the welding effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle body floor assembly, and in particular to a plasma welding device and method for a vehicle body floor assembly. Background Art

[0002] The underbody assembly is a very important part of the vehicle structure, forming the bottom frame of the vehicle. This component is usually composed of multiple parts welded or connected together by other means to form a solid overall structure, such as Figure 2 What is shown is a schematic diagram of the structure of an existing vehicle body floor assembly, including a bottom beam 800, a support beam 801 and a support rod 802, wherein the support beam 801 is welded at the center of the bottom beam 800, and the support rod 802 is welded to the support beam 801. There are usually two ways to weld the vehicle body floor assembly, the first is welding by a welding device, and the second is manual welding.

[0003] Chinese patent application No. 2022113146773 discloses a car body welding device, including a welding table, a clamping mechanism and a welding robot arm; the clamping mechanism includes a first frame, a second frame, a first driving member and a locking assembly; the first frame is installed on the welding table and a plurality of first positioning columns are slidably inserted thereon, one end of the second frame is hingedly connected to one end of the first frame, and a plurality of second positioning columns are vertically and slidably inserted in the second frame. In the present invention, when the first frame and the second frame are interlocked with each other, the columns of the side enclosure of the car body will squeeze the corresponding number of first positioning columns and second positioning columns to clamp the side enclosure of the car body in a surrounding form, but it is obvious that the above-mentioned welding device is not convenient for Figure 2 The underbody assembly shown is welded.

[0004] The process of manual welding is as follows: First, the worker uses a welding gun to weld the support rod 802 to the support beam 801, and then moves the welded parts of the support beam 801 and the support rod 802 to the center of the bottom beam 800. The worker then uses a welding gun to weld the support beam 801 to the center of the bottom beam 800. However, manual welding is cumbersome to operate and reduces the welding effect. Therefore, we propose a plasma welding device and method for a vehicle body floor assembly. Summary of the invention

[0005] The purpose of the present invention is to address the deficiencies in the prior art and provide a vehicle body floor assembly plasma welding device and method, which can enhance the welding effect between the support beam and the bottom beam by driving the welding head a to move and weld the two horizontal sides of the support beam and the bottom beam, and by using the welding head b to weld the two vertical sides of the support beam and the bottom beam; after the bolts screwed into the threaded holes are disassembled into the hexagonal grooves of the rotating caps by the first assembly mechanism, the welding head a is driven to extend into the avoidance groove to weld the circular holes and the threaded hole areas, thereby enhancing the welding effect between the support beam and the bottom beam. Compared with manual welding, the device and method are simple to operate and improve the welding effect.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A plasma welding device for a vehicle body floor assembly comprises a fixing mechanism, one side of which is provided with a manipulator a, a first assembly mechanism, a first plasma welding mechanism, and a transmission mechanism, and the transmission mechanism is provided with a second assembly mechanism and a second plasma welding mechanism;

[0008] The first plasma welding mechanism comprises a track arranged in the air, a moving block is slidably arranged on the track, a moving driving member a is installed at the bottom of the moving block, a lifting frame is installed at the output end of the moving driving member a, a welding assembly is arranged on one side of the lifting frame, and the first assembly mechanism is arranged on the other side of the lifting frame;

[0009] The welding assembly includes a linear driving member a installed on one side of the lifting frame, a moving plate a is installed at the output end of the linear driving member a, a rotating driving member a is installed on the moving plate a, a lifting plate is installed at the output end of the rotating driving member a, a connecting rod a is installed on the lifting plate, a welding head a is installed on the connecting rod a, rotating driving members b are installed at both ends of the connecting rod a, a swing rod is installed at the output end of the rotating driving member b, and a welding head b is installed on the swing rod.

[0010] The first assembly mechanism includes: a linear driving member c, which is installed on the other side of the lifting frame; a moving plate b, which is installed on the output end of the linear driving member c; a rotating driving member c, which is installed on the bottom of the moving plate b; a moving frame, which is installed on the output end of the rotating driving member c; a rotating driving member d, two rotating driving members d are installed on both sides of the moving frame; a rotating cap, which is installed on the output end of the rotating driving member d, and a hexagonal groove is provided in the rotating cap, and a hexagonal bolt is provided in the hexagonal groove, and the hexagonal bolt is magnetically adsorbed to the hexagonal groove.

[0011] The fixing mechanism includes: a connecting frame, which is installed on the ground; a rotating driving member e, which is installed on the connecting frame; a supporting frame, which is installed on the output end of the rotating driving member e; a clamping block, a plurality of the clamping blocks are installed on the supporting frame, and a clamping groove is opened in the clamping block.

[0012] The transmission mechanism includes a transmission belt arranged on the ground, a manipulator b and a linear drive member i are provided on one side of the transmission belt, an output rod is installed at the output end of the linear drive member i, a block is installed on the outside of the output rod, a receiving block is installed on the output rod, a receiving groove is provided in the receiving block, a mounting frame a is provided on one side of the linear drive member i, a rotating drive member i is installed on the mounting frame a, a gear a is installed at the output end of the rotating drive member i, a gear b is rotatably provided on the mounting frame a, a slide groove is provided in the gear b, the output rod and the block slide in the slide groove, and the gear a is meshed with the gear b.

[0013] The second assembly mechanism comprises a fixed frame a mounted on the conveyor belt, a flat plate is mounted on the fixed frame a, a guide rail a and a linear drive member b are mounted on the flat plate, a sliding plate is slidably provided on the guide rail a, and an output end of the linear drive member b is connected to the sliding plate;

[0014] The sliding plate is equipped with a guide rail b, a linear drive member f, and a linear drive member d. A material storage box is slidably provided on the guide rail b. Storage slots a and b are provided in the material storage box. A push rod is installed at the output end of the linear drive member f. The output end of the linear drive member d is connected to the material storage box.

[0015] The second plasma welding mechanism includes: a mounting frame b, which is mounted on the fixed frame a; a linear driving member e, which is mounted on the mounting frame b; a rotary driving member j, which is mounted on the output end of the linear driving member e; a swing frame, which is mounted on the output end of the rotary driving member j, and a groove is provided in the swing frame; a rotating block, which is rotatably arranged in the groove; a welding nozzle a, which is mounted on the rotating block; a connecting rod b, which is mounted on one side of the rotating block; a rotary driving member f, which is mounted on the swing frame, and the output end of the rotary driving member f is connected to the connecting rod b through a belt drive.

[0016] A fixed frame b is installed on the conveyor belt, a linear driving component g is installed on the fixed frame b, a rotary driving component g is installed on the output end of the linear driving component g, and a detection screw is installed on the output end of the rotary driving component g; a linear driving component h is installed on the fixed frame b, a rotary driving component h is installed on the output end of the linear driving component h, and a drill bit is installed on the output end of the rotary driving component h; a linear driving component j is installed on the fixed frame b, and an injection pipe is installed on the output end of the linear driving component j.

[0017] The beneficial effects of the present invention are:

[0018] (1) The present invention drives the welding head a to move to weld the two horizontal sides of the support beam and the bottom beam, and uses the welding head b to weld the two vertical sides of the support beam and the bottom beam, thereby enhancing the welding effect between the support beam and the bottom beam; after the bolts screwed into the threaded holes are disassembled into the hexagonal grooves of the rotating caps by the first assembly mechanism, the welding head a is driven to extend into the avoidance groove to weld the circular holes and the threaded hole areas, thereby enhancing the welding effect between the support beam and the bottom beam. Compared with manual welding, the operation is simple and the welding effect is improved.

[0019] (2) The present invention drives the accommodating block to move upward, thereby driving the support beam in the accommodating groove to move upward, driving the support beam to move to the second assembly station, driving the sliding plate to move, and driving the material storage box to move and contact the support beam. At this time, the mounting hole on the support beam corresponds to the circular groove a of the material storage box; the linear drive member f drives the push rod to move forward, driving the push rod to push the support rod in the circular groove a into the mounting hole of the support beam, thereby completing the assembly of the support rod and the support beam.

[0020] (3) The present invention drives the welding nozzle a to rotate by the rotating driving member j, and drives the welding nozzle a to weld the support rod and the support beam welding ring a area; the rotating driving member i drives the gear a to rotate, drives the output rod to rotate, drives the support beam in the accommodating groove to rotate 180 degrees, and the rotating driving member j drives the welding nozzle a to rotate, and drives the welding nozzle a to weld the support rod and the support beam welding ring b area.

[0021] (4) The present invention drives the support beam in the accommodating groove to rotate 90 degrees through the rotary driving member i, so that the threaded hole of the support beam corresponds to the position of the detection screw; the linear driving member g drives the detection screw to move to the threaded hole of the support beam, and the rotary driving member g drives the detection screw to rotate. If the detection screw can be completely screwed into the threaded hole, the threaded hole detection is qualified, and then the assembly process b is entered.

[0022] (5) The present invention drives the accommodating block to move upward through the linear drive member i, thereby driving the support beam in the accommodating groove to move to the drilling station. The linear drive member h drives the rotating drill bit to drill the unqualified threaded hole area, and then drives the support beam to move upward. The linear drive member j drives the jet pipe to spray the drilling area of ​​the support beam to blow away the debris in the hole. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0024] Figure 2 It is a structural schematic diagram of a vehicle body floor assembly in the prior art;

[0025] Figure 3 It is a schematic diagram of the supporting beam and supporting rod structure in the prior art;

[0026] Figure 4 It is a schematic structural diagram of the first plasma welding mechanism of the present invention;

[0027] Figure 5 This is a schematic diagram of the structure of the welding assembly of the present invention;

[0028] Figure 6 It is a structural schematic diagram of the fixing mechanism of the present invention;

[0029] Figure 7 It is a schematic diagram of the transmission mechanism and the second assembly mechanism of the present invention;

[0030] Figure 8 It is a schematic diagram of the transmission mechanism structure of the present invention;

[0031] Fig. 9 It is a schematic structural diagram of the second assembly mechanism and the second plasma welding mechanism of the present invention;

[0032] Fig.10 It is a schematic diagram of the structure of the second assembly mechanism of the present invention;

[0033] Fig.11 For the present invention Fig. 9 The enlarged schematic diagram at A in the middle;

[0034] Fig.12 It is a schematic diagram of the drill bit structure of the present invention;

[0035] Fig.13 It is a schematic diagram of the structure of the material storage box of the present invention;

[0036] Fig.14 This is a schematic diagram of the positions of welding ring a, welding ring b, and welding ring c of the present invention;

[0037] Fig.15 This is a schematic diagram of the bolt assembly of the present invention;

[0038] Fig.16 It is a schematic diagram of the positions of the horizontal and vertical sides of the present invention.

[0039] The accompanying drawings of the present application are as follows: 1. fixing mechanism; 101. connecting frame; 102. rotating drive member e; 103. carrying frame; 104. clamping block; 1041. clamping slot; 2. manipulator a; 3. first assembly mechanism; 301. linear drive member c; 302. moving plate b; 303. rotating drive member c; 304. moving frame; 305. rotating drive member d; 306. rotating cap; 3061. hexagonal slot; 4. first plasma welding mechanism; 401. track; 402. moving block; 403. moving drive member a; 404. lifting frame; 41. welding Connecting assembly; 411, linear drive member a; 412, moving plate a; 413, rotating drive member a; 414, lifting plate; 415, connecting rod a; 416, welding head a; 417, rotating drive member b; 418, swing rod; 419, welding head b; 5, transmission mechanism; 501, transmission belt; 502, manipulator b; 503, linear drive member i; 504, output rod; 5041, block; 505, receiving block; 5051, receiving slot; 506, mounting frame a; 507, rotating drive member i; 508, gear a; 509, gear b; 509 1. Slide; 6. Second assembly mechanism; 601. Connecting frame a; 602. Flat plate; 603. Guide rail a; 604. Linear drive member b; 605. Sliding plate; 606. Guide rail b; 607. Linear drive member f; 608. Linear drive member d; 609. Storage box; 6091. Storage slot a; 6092. Storage slot b; 6093. Round slot a; 6094. Round slot b; 610. Push rod; 7. Second plasma welding mechanism; 701. Mounting frame b; 702. Linear drive member e; 703. Rotating drive member j; 704. Swinging frame; 704 1. groove; 705. rotating block; 706. welding nozzle a; 707. connecting rod b; 708. rotating drive member f; 709. connecting frame b; 710. linear drive member g; 711. rotating drive member g; 712. detection screw; 713. linear drive member h; 714. rotating drive member h; 715. drill bit; 716. linear drive member j; 717. jet pipe; 800. bottom beam; 8001. avoidance groove; 8002. round hole; 801. support beam; 8011. threaded hole; 8012. mounting hole; 802. support rod; 803. mounting sleeve. DETAILED DESCRIPTION

[0040] 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.

[0041] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0043] Embodiment 1: Figure 1-Figure 16 As shown, this embodiment provides a vehicle body floor assembly plasma welding device, including a fixing mechanism 1, a manipulator a2, a first assembly mechanism 3, a first plasma welding mechanism 4, and a transmission mechanism 5 are provided on one side of the fixing mechanism 1, and a second assembly mechanism 6 and a second plasma welding mechanism 7 are provided on the transmission mechanism 5;

[0044] like Figure 1 , Figure 7 and Figure 8As shown, the transmission mechanism 5 includes a transmission belt 501 arranged on the ground, a manipulator b502 and a linear drive member i503 are arranged on one side of the transmission belt 501, an output rod 504 is installed at the output end of the linear drive member i503, a block 5041 is installed on the outer side of the output rod 504, a receiving block 505 is installed on the output rod 504, a receiving groove 5051 is opened in the receiving block 505, a mounting frame a506 is provided on one side of the linear drive member i503, a rotating drive member i507 is installed on the mounting frame a506, a gear a508 is installed at the output end of the rotating drive member i507, a gear b509 is rotatably provided on the mounting frame a506, a slide groove 5091 is opened in the gear b509, the output rod 504 and the block 5041 slide in the slide groove 5091, and the gear a508 is meshed with the gear b509.

[0045] In this embodiment, the conveyor belt 501 transports the support beam 801. When the support beam 801 is transported to the second assembly station, the robot b502 moves the support beam 801 on the conveyor belt 501 to the receiving groove 5051 of the receiving block 505. It should be noted that a negative pressure hole (not shown in the figure) is provided in the receiving groove 5051, and a pipe (not shown in the figure) is provided at the bottom of the receiving block 505. Negative pressure is introduced into the pipe so that the support beam 801 is negatively pressure-adsorbed in the receiving groove 5051. This is a conventional technical means in the field and will not be described in detail here.

[0046] like Figure 7-10 As shown, the second assembly mechanism 6 includes a fixed frame a601 installed on the conveyor belt 501, a flat plate 602 is installed on the fixed frame a601, a guide rail a603 and a linear drive member b604 are installed on the flat plate 602, a sliding plate 605 is slidably provided on the guide rail a603, and the output end of the linear drive member b604 is connected to the sliding plate 605; a guide rail b606, a linear drive member f607, and a linear drive member d608 are installed on the sliding plate 605, a material storage box 609 is slidably provided on the guide rail b606, and a storage slot a6091 and a storage slot b6092 are opened in the material storage box 609, and a linear drive member b604 is connected to the output end of the linear drive member b604. A pushing rod 610 is installed at the output end of the driving member f607, and the output end of the linear driving member d608 is connected to the storage box 609. A circular groove a6093 and a circular groove b6094 are opened in the storage box 609. The storage groove a6091 is connected to the circular groove a6093, and the storage groove b6092 is connected to the circular groove b6094. A plurality of stacked support rods 802 are arranged in the storage groove a6091, and the bottom support rod 802 falls into the circular groove a6093. A plurality of stacked mounting sleeves 803 are arranged in the circular groove b6094, and the bottom mounting sleeve 803 falls into the circular groove b6094.

[0047] In this embodiment, the linear drive member i503 drives the accommodating block 505 to move upward, driving the support beam 801 in the accommodating groove 5051 to move upward, driving the support beam 801 to move to the second assembly station, and the linear drive member b604 drives the sliding plate 605 to move, driving the material storage box 609 to move and contact the support beam 801. At this time, the mounting hole 8012 on the support beam 801 corresponds to the position of the circular groove a6093 of the material storage box 609;

[0048] The linear drive component f607 drives the push rod 610 to move forward, driving the push rod 610 to push the support rod 802 in the circular groove a6093 into the mounting hole 8012 of the support beam 801, completing the assembly of the support rod 802 and the support beam 801.

[0049] like Figure 7-Figure 11 As shown, the second plasma welding mechanism 7 includes: a mounting frame b701, the mounting frame b701 is mounted on the fixed frame a601; a linear driving member e702, the linear driving member e702 is mounted on the mounting frame b701; a rotary driving member j703, the rotary driving member j703 is mounted on the output end of the linear driving member e702; a swing frame 704, the swing frame 704 is mounted on the output end of the rotary driving member j703, and a groove 7041 is provided in the swing frame 704; a rotating block 705, the rotating block 705 is rotatably arranged at In the groove 7041; the welding nozzle a706, the welding nozzle a706 is installed on the rotating block 705; the connecting rod b707, the connecting rod b707 is installed on one side of the rotating block 705; the rotating driving member f708, the rotating driving member f708 is installed on the swing frame 704, and the output end of the rotating driving member f708 and the connecting rod b707 are connected by a belt drive. It should be noted that the rotating driving member f708 drives the welding nozzle a706 to rotate around the axis of the connecting rod b707 to adjust the angle of the welding nozzle a706.

[0050] In this embodiment, the linear drive member i503 drives the accommodating block 505 to move upward, driving the support beam 801 in the accommodating groove 5051 to move upward, driving the support beam 801 to move to the second welding station, and the linear drive member e702 drives the swing frame 704 to move forward, driving the welding nozzle a706 to move to the support beam 801, at which time the welding nozzle a706 corresponds to the connection position of the support rod 802 and the support beam 801;

[0051] The rotating driving component j703 drives the welding nozzle a706 to rotate, and drives the welding nozzle a706 to weld the welding ring a area of ​​the support rod 802 and the support beam 801; the rotating driving component i507 drives the gear a508 to rotate, drives the output rod 504 to rotate, drives the support beam 801 in the accommodating groove 5051 to rotate 180 degrees, and the rotating driving component j703 drives the welding nozzle a706 to rotate, and drives the welding nozzle a706 to weld the welding ring b area of ​​the support rod 802 and the support beam 801.

[0052] like Fig.12 As shown, a fixed frame b709 is installed on the transmission belt 501, a linear driving member g710 is installed on the fixed frame b709, a rotary driving member g711 is installed on the output end of the linear driving member g710, and a detection screw 712 is installed on the output end of the rotary driving member g711; a linear driving member h713 is installed on the fixed frame b709, a rotary driving member h714 is installed on the output end of the linear driving member h713, and a drill bit 715 is installed on the output end of the rotary driving member h714; a linear driving member j716 is installed on the fixed frame b709, and a jet pipe 717 is installed on the output end of the linear driving member j716, and the jet pipe 717 ejects gas. This is a conventional technical means in the field;

[0053] In this embodiment, the linear drive member i503 drives the accommodating block 505 to move downward, driving the support beam 801 in the accommodating groove 5051 to move to the detection station, and the rotary drive member i507 drives the support beam 801 in the accommodating groove 5051 to rotate 90 degrees, so that the threaded hole 8011 on the support beam 801 corresponds to the position of the detection screw 712;

[0054] The linear drive component g710 drives the detection screw 712 to move to the threaded hole 8011 of the support beam 801, and the rotary drive component g711 drives the detection screw 712 to rotate. If the detection screw 712 can be completely screwed into the threaded hole 8011, the threaded hole 8011 is qualified, and the assembly process b is entered; if the detection screw 712 cannot be completely screwed into the threaded hole 8011, the threaded hole 8011 is unqualified, and the drilling process is entered.

[0055] In this embodiment, the linear drive member i503 drives the accommodating block 505 to move upward, driving the support beam 801 in the accommodating groove 5051 to move to the drilling station, the linear drive member h713 drives the rotating drill bit 715 to drill the unqualified threaded hole 8011 area, and then drives the support beam 801 to move upward, and the linear drive member j716 drives the jet pipe 717 to spray air to the drilling area of ​​the support beam 801 to blow away the debris in the hole;

[0056] In this embodiment, the rotary drive member i507 drives the support beam 801 in the receiving groove 5051 to rotate until the drilling area of ​​the support beam 801 faces the material storage box 609, the linear drive member d608 drives the material storage box 609 to move until the circular groove b6094 corresponds to the drilling area position of the support beam 801, and the linear drive member f607 drives the push rod 610 to move forward to push the installation sleeve 803 in the circular groove b6094 into the drilling area;

[0057] Drive the support beam 801 in the accommodating groove 5051 to move to the second welding station, drive the welding nozzle a706 to weld the support beam 801 and the welding ring c area of ​​the mounting sleeve 803, and then use the robot b502 to move the welded parts of the support beam 801 and the support rod 802 to the conveyor belt 501.

[0058] Embodiment 2: Figure 1-Figure 16 As shown, the components identical or corresponding to those in the first embodiment are marked with the corresponding reference numerals in the first embodiment. For the sake of simplicity, only the differences from the first embodiment are described below. The second embodiment differs from the first embodiment in that:

[0059] like Figure 6 As shown, the fixing mechanism 1 in this embodiment includes: a connecting frame 101, the connecting frame 101 is arranged on the ground; a rotating driving member e102, the rotating driving member e102 is installed on the connecting frame 101; a supporting frame 103, the supporting frame 103 is installed at the output end of the rotating driving member e102; a clamping block 104, a plurality of clamping blocks 104 are installed on the supporting frame 103, and a clamping groove 1041 is opened in the clamping block 104;

[0060] In this embodiment, the bottom beam 800 is hoisted onto the fixing mechanism 1 by a crane, specifically, the bottom beam 800 is located in the clamping groove 1041, and the rotating driving member e102 can drive the bottom beam 800 to rotate. It should be noted that other transporting mechanisms can also be used for transporting or the bottom beam 800 can be transported to the fixing mechanism 1 manually. Manual transport is more troublesome and is not the preferred method.

[0061] It should be noted that: threaded holes 8011 are opened on both sides of the support beam 801, an avoidance groove 8001 and a circular hole 8002 are opened in the bottom beam 800, a mounting hole 8012 is opened in the support beam 801, the support rod 802 is inserted into the mounting hole 8012, and a threaded hole 8011 is opened in the mounting sleeve 803.

[0062] like Figure 4 and Figure 5 As shown, the first plasma welding mechanism 4 includes a track 401 arranged in the air, a moving block 402 is slidably arranged on the track 401, a moving driving member a403 is installed at the bottom of the moving block 402, a lifting frame 404 is installed at the output end of the moving driving member a403, a welding assembly 41 is arranged on one side of the lifting frame 404, and the first assembly mechanism 3 is arranged on the other side of the lifting frame 404, and the moving driving member a403 is preferably a combination of a motor and a cylinder;

[0063] The welding assembly 41 includes a linear driving member a411 installed on one side of the lifting frame 404, a moving plate a412 is installed on the output end of the linear driving member a411, a rotating driving member a413 is installed on the moving plate a412, a lifting plate 414 is installed on the output end of the rotating driving member a413, a connecting rod a415 is installed on the lifting plate 414, a welding head a416 is installed on the connecting rod a415, rotating driving members b417 are installed at both ends of the connecting rod a415, a swing rod 418 is installed on the output end of the rotating driving member b417, a welding head b419 is installed on the swing rod 418, and the welding heads a416 and b419 are plasma welding gun heads, which are prior art and will not be described in detail herein;

[0064] It should be noted that the movement of the moving block 402 on the track 401 is a conventional technical means in this field and will not be described in detail here. In addition, the moving block 402 moves on the track 401, driving the welding heads a416 and b419 to move, the motion driving member a403 can drive the lifting plate 414 to rise and fall, and can also drive the lifting plate 414 to rotate, the linear driving member a411 drives the welding heads a416 and b419 to move, the rotating driving member a413 can drive the lifting plate 414 to rotate, and the rotating driving member b417 drives the swing rod 418 to rotate. In other words, the welding heads a416 and b419 can move freely without restriction, which is convenient for welding the two vertical sides and horizontal sides of the support beam 801 and the bottom beam 800.

[0065] like Figure 4 and Figure 5 As shown, the first assembly mechanism 3 includes: a linear driving member c301, which is installed on the other side of the lifting frame 404; a moving plate b302, which is installed on the output end of the linear driving member c301; a rotating driving member c303, which is installed on the bottom of the moving plate b302; a moving frame 304, which is installed on the output end of the rotating driving member c303; a rotating driving member d305, two rotating driving members d305 are installed on both sides of the moving frame 304; a rotating cap 306, which is installed on the output end of the rotating driving member d305, and a hexagonal groove 3061 is opened in the rotating cap 306, and a hexagonal bolt is arranged in the hexagonal groove 3061, and the hexagonal bolt is magnetically adsorbed to the hexagonal groove 3061.

[0066] In this embodiment, the robot a2 moves the welded parts of the support beam 801 and the support rod 802 on the conveyor belt 501 to the center of the bottom beam 800 on the fixing mechanism 1, and the moving block 402 moves on the track 401, driving the first assembly mechanism 3 to move above the bottom beam 800;

[0067] The motion drive member a403 drives the lifting frame 404 to move downward until the rotating cap 306 corresponds to the threaded hole 8011 of the support beam 801, and the linear drive member c301 drives the rotating cap 306 to move until the rotating cap 306 passes through the avoidance groove 8001, and the bolt passes through the circular hole 8002 and contacts the threaded hole 8011 (such as Fig.15 As shown), the rotating driving member d305 drives the bolt to be screwed into the threaded hole 8011, fixing the welding parts of the support beam 801 and the support rod 802 at the center of the bottom beam 800, and then remove the robot a2.

[0068] In this embodiment, the welding head a416 is driven to weld the two horizontal sides of the support beam 801 and the bottom beam 800, and the welding head b419 is used to weld the two vertical sides of the support beam 801 and the bottom beam 800, so as to enhance the welding effect between the support beam 801 and the bottom beam 800 (the horizontal and vertical sides are located as shown in FIG. Fig.16 shown);

[0069] After the bolt screwed into the threaded hole 8011 is removed into the hexagonal groove 3061 of the rotating cap 306 through the first assembly mechanism 3, the welding head a416 is driven to extend into the avoidance groove 8001 to weld the circular hole 8002 and the threaded hole 8011 area, thereby enhancing the welding effect between the support beam 801 and the bottom beam 800.

[0070] Embodiment 3: This embodiment provides a welding method for a vehicle body floor assembly, comprising the following steps:

[0071] Step 1, transport process: the conveyor belt 501 transports the support beam 801. When the support beam 801 is transported to the second assembly station, the robot b502 moves the support beam 801 on the conveyor belt 501 to the receiving groove 5051 of the receiving block 505.

[0072] Step 2, assembly process a: the linear drive member i503 drives the accommodating block 505 to move upward, driving the support beam 801 in the accommodating groove 5051 to move upward, driving the support beam 801 to move to the second assembly station, and the linear drive member b604 drives the sliding plate 605 to move, driving the material storage box 609 to move and contact the support beam 801. At this time, the mounting hole 8012 on the support beam 801 corresponds to the circular groove a6093 of the material storage box 609;

[0073] The linear drive member f607 drives the push rod 610 to move forward, and drives the push rod 610 to push the support rod 802 in the circular groove a6093 into the mounting hole 8012 of the support beam 801, thereby completing the assembly of the support rod 802 and the support beam 801;

[0074] Step 3, welding process a: the linear drive member i503 drives the accommodating block 505 to move upward, driving the support beam 801 in the accommodating groove 5051 to move upward, driving the support beam 801 to move to the second welding station, and the linear drive member e702 drives the swing frame 704 to move forward, driving the welding nozzle a706 to move to the support beam 801, at this time, the welding nozzle a706 corresponds to the connection position of the support rod 802 and the support beam 801;

[0075] The rotating driving member j703 drives the welding nozzle a706 to rotate, and drives the welding nozzle a706 to weld the support rod 802 and the support beam 801 welding ring a area; the rotating driving member i507 drives the gear a508 to rotate, drives the output rod 504 to rotate, drives the support beam 801 in the accommodating groove 5051 to rotate 180 degrees, and the rotating driving member j703 drives the welding nozzle a706 to rotate, and drives the welding nozzle a706 to weld the support rod 802 and the support beam 801 welding ring b area;

[0076] Step 4, detection process: the linear drive member i503 drives the accommodating block 505 to move downward, driving the support beam 801 in the accommodating groove 5051 to move to the detection station, and the rotary drive member i507 drives the support beam 801 in the accommodating groove 5051 to rotate 90 degrees, so that the threaded hole 8011 of the support beam 801 corresponds to the position of the detection screw 712;

[0077] The linear drive g710 drives the detection screw 712 to move to the threaded hole 8011 of the support beam 801, and the rotary drive g711 drives the detection screw 712 to rotate. If the detection screw 712 can be completely screwed into the threaded hole 8011, the threaded hole 8011 is tested to be qualified, and then the assembly process b is entered;

[0078] If the detection screw 712 cannot be completely screwed into the threaded hole 8011, the threaded hole 8011 is detected as unqualified, and the drilling process is entered;

[0079] Step 5, drilling process: the linear drive member i503 drives the accommodating block 505 to move upward, driving the support beam 801 in the accommodating groove 5051 to move to the drilling station, the linear drive member h713 drives the rotating drill bit 715 to drill the unqualified threaded hole 8011 area, and then drives the support beam 801 to move upward, and the linear drive member j716 drives the jet pipe 717 to spray the drilling area of ​​the support beam 801 to blow away the debris in the hole;

[0080] Step 6, welding process b: the rotary drive member i507 drives the support beam 801 in the receiving groove 5051 to rotate until the drilling area of ​​the support beam 801 faces the material storage box 609, the linear drive member d608 drives the material storage box 609 to move until the circular groove b6094 corresponds to the drilling area of ​​the support beam 801, and the linear drive member f607 drives the push rod 610 to move forward to push the installation sleeve 803 in the circular groove b6094 into the drilling area;

[0081] Drive the support beam 801 in the receiving groove 5051 to move to the second welding station, and drive the welding nozzle a706 to weld the support beam 801 and the welding ring c area of ​​the mounting sleeve 803;

[0082] Step 7, assembly process b: the robot a2 moves the welded parts of the support beam 801 and the support rod 802 on the conveyor belt 501 to the center of the bottom beam 800 on the fixing mechanism 1, and the moving block 402 moves on the track 401, driving the first assembly mechanism 3 to move above the bottom beam 800;

[0083] The motion driving component a403 drives the lifting frame 404 to move downward until the rotating cap 306 corresponds to the threaded hole 8011 of the support beam 801. The linear driving component c301 drives the rotating cap 306 to move until the rotating cap 306 passes through the avoidance groove 8001, and the bolt passes through the round hole 8002 and contacts the threaded hole 8011. The rotating driving component d305 drives the bolt to be screwed into the threaded hole 8011 to fix the welding parts of the support beam 801 and the support rod 802 at the center of the bottom beam 800. At this time, the robot a2 is removed to prevent the robot a2 from affecting the subsequent welding.

[0084] Step 8: Welding process c: drive the welding head a416 to move to weld the two horizontal sides of the support beam 801 and the bottom beam 800, and use the welding head b419 to weld the two vertical sides of the support beam 801 and the bottom beam 800 to enhance the welding effect between the support beam 801 and the bottom beam 800;

[0085] After the bolt screwed into the threaded hole 8011 is removed into the hexagonal groove 3061 of the rotating cap 306 through the first assembly mechanism 3, the welding head a416 is driven to extend into the avoidance groove 8001 to weld the circular hole 8002 and the threaded hole 8011 area, thereby enhancing the welding effect between the support beam 801 and the bottom beam 800.

[0086] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A plasma welding device for a vehicle body floor assembly, characterized in that: It comprises a fixing mechanism (1), wherein one side of the fixing mechanism (1) is provided with a manipulator a (2), a first assembly mechanism (3), a first plasma welding mechanism (4), and a transmission mechanism (5), and the transmission mechanism (5) is provided with a second assembly mechanism (6) and a second plasma welding mechanism (7); The first plasma welding mechanism (4) comprises a track (401) arranged in the air, a moving block (402) being slidably arranged on the track (401), a moving driving member a (403) being installed at the bottom of the moving block (402), a lifting frame (404) being installed at the output end of the moving driving member a (403), a welding assembly (41) being provided on one side of the lifting frame (404), and the first assembly mechanism (3) being arranged on the other side of the lifting frame (404); The welding assembly (41) comprises a linear driving member a (411) mounted on one side of the lifting frame (404); a moving plate a (412) is mounted on the output end of the linear driving member a (411); a rotating driving member a (413) is mounted on the moving plate a (412); a lifting plate (414) is mounted on the output end of the rotating driving member a (413); a connecting rod a (415) is mounted on the lifting plate (414); a welding head a (416) is mounted on the connecting rod a (415); rotating driving members b (417) are mounted at both ends of the connecting rod a (415); a swing rod (418) is mounted on the output end of the rotating driving member b (417); and a welding head b (419) is mounted on the swing rod (418).

2. The plasma welding device for a vehicle body floor assembly according to claim 1, characterized in that: The first assembly mechanism (3) comprises: A linear drive component c (301), the linear drive component c (301) being installed on the other side of the lifting frame (404); A moving plate b (302), the moving plate b (302) being mounted on an output end of the linear drive member c (301); A rotating driving member c (303), wherein the rotating driving member c (303) is mounted on the bottom of the moving plate b (302); A moving frame (304), the moving frame (304) being mounted on an output end of the rotating driving member c (303); A rotating driving member d (305), wherein two rotating driving members d (305) are installed on both sides of the moving frame (304); A rotating cap (306) is mounted on the output end of the rotating driving member d (305), a hexagonal slot (3061) is provided in the rotating cap (306), a hexagonal bolt is provided in the hexagonal slot (3061), and the hexagonal bolt is magnetically attracted to the hexagonal slot (3061).

3. The plasma welding device for a vehicle body floor assembly according to claim 2, characterized in that: The fixing mechanism (1) comprises: A connecting frame (101), wherein the connecting frame (101) is arranged on the ground; A rotating driving member e (102), wherein the rotating driving member e (102) is mounted on the connecting frame (101); A carrier frame (103), the carrier frame (103) being mounted on an output end of the rotating driving member e (102); A clamping block (104), wherein a plurality of the clamping blocks (104) are mounted on the supporting frame (103), and a clamping groove (1041) is provided in the clamping block (104).

4. The plasma welding device for a vehicle body floor assembly according to claim 3, characterized in that: The transmission mechanism (5) comprises a transmission belt (501) arranged on the ground, a robot arm b (502) and a linear drive member i (503) are arranged on one side of the transmission belt (501), an output rod (504) is installed at the output end of the linear drive member i (503), a block (5041) is installed on the outer side of the output rod (504), a receiving block (505) is installed on the output rod (504), a receiving groove (5051) is provided in the receiving block (505), and the linear drive member i (503) is provided with a plurality of receiving slots (5051) and a plurality of receiving slots (5051) arranged on the receiving block (505). A mounting frame a (506) is provided on the side, a rotating driving member i (507) is installed on the mounting frame a (506), a gear a (508) is installed on the output end of the rotating driving member i (507), a gear b (509) is rotatably provided on the mounting frame a (506), a slide groove (5091) is provided in the gear b (509), the output rod (504) and the block (5041) slide in the slide groove (5091), and the gear a (508) is meshed with the gear b (509).

5. The plasma welding device for a vehicle body floor assembly according to claim 4, characterized in that: The second assembly mechanism (6) comprises a connecting frame a (601) mounted on the conveyor belt (501), a flat plate (602) being mounted on the connecting frame a (601), a guide rail a (603) and a linear drive member b (604) being mounted on the flat plate (602), a sliding plate (605) being slidably disposed on the guide rail a (603), and an output end of the linear drive member b (604) being connected to the sliding plate (605); The sliding plate (605) is installed with a guide rail b (606), a linear drive member f (607), and a linear drive member d (608); a material storage box (609) is slidably provided on the guide rail b (606); a storage slot a (6091) and a storage slot b (6092) are provided in the material storage box (609); a push rod (610) is installed at the output end of the linear drive member f (607); and the output end of the linear drive member d (608) is connected to the material storage box (609).

6. The plasma welding device for a vehicle body floor assembly according to claim 5, characterized in that: The second plasma welding mechanism (7) comprises: A mounting frame b (701), wherein the mounting frame b (701) is mounted on the fixing frame a (601); A linear drive member e (702), wherein the linear drive member e (702) is mounted on the mounting frame b (701); A rotary driving member j (703), wherein the rotary driving member j (703) is mounted on an output end of the linear driving member e (702); A swing frame (704), the swing frame (704) being mounted on the output end of the rotary drive member j (703), and a groove (7041) being provided in the swing frame (704); A rotating block (705), the rotating block (705) being rotatably disposed in the groove (7041); A welding nozzle a (706), wherein the welding nozzle a (706) is mounted on the rotating block (705); A connecting rod b (707), wherein the connecting rod b (707) is installed on one side of the rotating block (705); A rotating driving member f (708), wherein the rotating driving member f (708) is mounted on the swing frame (704), and an output end of the rotating driving member f (708) is connected to the connecting rod b (707) via a belt drive.

7. The plasma welding device for a vehicle body floor assembly according to claim 6, characterized in that: A connecting frame b (709) is mounted on the transmission belt (501), a linear drive member g (710) is mounted on the connecting frame b (709), a rotary drive member g (711) is mounted on the output end of the linear drive member g (710), and a detection screw rod (712) is mounted on the output end of the rotary drive member g (711); A linear drive member h (713) is mounted on the fixed frame b (709), a rotary drive member h (714) is mounted on the output end of the linear drive member h (713), and a drill bit (715) is mounted on the output end of the rotary drive member h (714).

8. The plasma welding device for a vehicle body floor assembly according to claim 7, characterized in that: A linear drive member j (716) is mounted on the fixed frame b (709), and an injection pipe (717) is mounted on the output end of the linear drive member j (716).

9. The vehicle body floor assembly plasma welding device according to claim 8, characterized in that: A circular groove a (6093) and a circular groove b (6094) are provided in the material storage box (609); the storage groove a (6091) is communicated with the circular groove a (6093), and the storage groove b (6092) is communicated with the circular groove b (6094).

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