Armrest frame welding device for sofa production

Abstract

The invention discloses an armrest frame welding device for sofa production, and relates to the technical field of welding, the armrest frame welding device comprises a welding frame, two clamp sets, a first welding robot and a second welding robot, each clamp set comprises a clamp frame, a moving frame A, a moving frame B and a moving frame C, the middle of each clamp frame is hollow, and the moving frames A and C are movably arranged on the clamp frames; the movable frame B is fixed between the movable frame A and the movable frame C. The movable frame A, the movable frame B and the movable frame C are each provided with two sets of movable clamps and a set of fixed clamps, the two ends of one clamp set are rotatably arranged on the welding frame, and the other clamp set is arranged below the other clamp set and can move up and down on the welding frame. The handrail frame welding device can achieve welding of handrail frames of different sizes or irregular shapes and is wide in application range.

Description

Technical Field

[0001] The present invention relates to the technical field of welding, and particularly relates to a welding device for an armrest frame in sofa production. Background Art

[0002] Most frames of modern sofas are welded with stainless steel materials. The armrest frame is generally in the shape of a regular or irregular quadrilateral body, including two symmetric inner side frames, outer side frames, and four support rods between the inner side frames and the outer side frames. When the inner side frames and the outer side frames are regular rectangles, the obtained armrest frame is in the shape of a regular cuboid. When the inner side frames and the outer side frames are irregular rectangles, for example, when one side of the frame has a curvature, the obtained armrest frame is in the shape of an irregular quadrilateral body.

[0003] Currently, the existing sofa armrest frames are usually welded manually. First, the four border rods are placed on the fixture and welded into the inner side frames and the outer side frames. Then, the inner side frames, the outer side frames, and the support rods are fixed on the fixture, and then the support rods are welded between the inner side frames and the outer side frames. The welding process requires manual repeated positioning, resulting in low welding efficiency. Moreover, the positions of the existing fixtures are fixed and cannot adapt to armrest frames of different sizes or irregular shapes, making it difficult to meet the requirements of personalized customization. Summary of the Invention

[0004] Aiming at the defects existing in the above-mentioned prior art, the purpose of the present invention is to provide a welding device for an armrest frame in sofa production, so as to solve the problems of low welding efficiency of the sofa armrest frame and the inability of the fixture to adapt to different armrest frames.

[0005] The purpose of the present invention is achieved by adopting the following technical solutions:

[0006] A welding device for an armrest frame in sofa production, including a welding frame, two fixture groups, a first welding robot, and a second welding robot. The fixture group includes a fixture frame, a moving frame A, a moving frame B, and a moving frame C. The middle of the fixture frame is hollowed out. The moving frame A and the moving frame C are movably arranged on the fixture frame, and the moving direction is parallel to the length direction of the fixture frame. The moving frame B is fixed in the middle of the fixture frame and is arranged between the moving frame A and the moving frame C. Two groups of moving fixtures and a group of fixed fixtures fixed between the two moving fixtures are arranged on the moving frame A, the moving frame B, and the moving frame C. The moving direction of the moving fixture is parallel to the width direction of the fixture frame. Both ends of one fixture group are rotatably arranged on the welding frame, and its moving fixtures are used for clamping the frame rods and the support rods. The other fixture group is arranged below one fixture group and can move up and down on the welding frame, and its moving fixtures are used for clamping the frame rods. The first welding robot and the second welding robot are respectively arranged on both sides of the welding frame.

[0007] Further, the two fixture groups are respectively a first fixture group and a second fixture group. Two ends of the first fixture group are rotatably arranged on the welding frame. The second fixture group is arranged below the first fixture group and can move up and down on the welding frame;

[0008] The first fixture group includes a first fixture frame, a first moving frame A, a first moving frame B and a first moving frame C. The middle of the first fixture frame is hollowed out, and two ends thereof are rotatably arranged on the welding frame. The first moving frame A and the first moving frame C are movably arranged on the first fixture frame, and the moving direction is parallel to the length direction of the first fixture frame. The first moving frame B is fixed in the middle of the first fixture frame and is arranged between the first moving frame A and the first moving frame C. Two groups of first moving fixtures and a first fixed fixture fixed between the two first moving fixtures are arranged on each of the first moving frame A, the first moving frame B and the first moving frame C. The moving direction of the first moving fixture is parallel to the width direction of the first fixture frame;

[0009] The second fixture group includes a second fixture frame, a second moving frame A, a second moving frame B and a second moving frame C. The middle of the second fixture frame is hollowed out and can move up and down on the welding frame. The second moving frame A and the second moving frame C are movably arranged on the second fixture frame, and the moving direction is parallel to the length direction of the second fixture frame. The second moving frame B is fixed in the middle of the second fixture frame and is arranged between the second moving frame A and the second moving frame C. Two groups of second moving fixtures and a second fixed fixture fixed between the two second moving fixtures are arranged on each of the second moving frame A, the second moving frame B and the second moving frame C. The moving direction of the second moving fixture is parallel to the width direction of the second fixture frame.

[0010] Further, the first moving fixture includes a first moving plate, a first cylinder clamping member A, a first cylinder pushing member, and a first cushion block. The first moving plate is movable on the first moving frame A, the first moving frame B, and the first moving frame C. A through hole A for inserting the support rod is formed in the middle of the first moving plate. Through holes B corresponding to the position of the through hole A up and down are formed on the first moving frame A, the first moving frame B, and the first moving frame C. The first cylinder clamping members A on the first moving frame A and the first moving frame C are used to clamp two frame rods to be welded together respectively. The cylinder barrel of the first cylinder pushing member is fixed on the first moving plate, its piston end horizontally expands and contracts, and an extrusion block is fixed at its end. The first cushion block A is fixed at the position of the first moving plate where the first cylinder clamping member A and the first cylinder pushing member are not provided. The first cushion block A avoids the through hole A, and the height of the first cushion block A is the same as that of the first cylinder pushing member;

[0011] The first fixed fixture includes a first fixing plate, a first cylinder clamping member B, and a first cushion block B. The first fixing plate is fixed in the middle of the first moving frame A, the first moving frame B, and the first moving frame C. The first cylinder clamping member B is used to clamp the frame rod. The first cushion block B is fixed at the position of the first fixing plate where the first cylinder clamping member B is not provided.

[0012] Further, the first cylinder clamping member A and the first cylinder clamping member B have the same structure, including a first cylinder A, a first rotating rod, a first pressing rod, and a first hinge rod. The first cylinder A is fixed in position and its piston end expands and contracts upward. Its cylinder barrel is higher than the first cushion block A and the first cushion block B. A first connecting block is fixed at the top of its cylinder barrel. The top of its piston end is rotatably connected to one end of the first rotating rod. The first pressing rod is fixed at the bottom of the other end of the first rotating rod. One end of the first hinge rod is rotatably connected to the first rotating rod and the other end is rotatably connected to the first connecting block.

[0013] Further, first electric lead screws and first slide rods are provided on both sides of the first fixture frame. The first moving frame A and the first moving frame C are respectively slidably connected to the first electric lead screw on one side and the first slide rod on the other side; two second electric lead screws are provided on the first moving frame A, the first moving frame B, and the first moving frame C. The two first moving fixtures are respectively slidably connected to the two second electric lead screws.

[0014] Further, the second moving fixture includes a second moving plate and a second cylinder clamp A. The second moving plate is movable on the second moving frame A, the second moving frame B, and the second moving frame C. The second cylinder clamp A on the second moving frame A and the second moving frame C is used to clamp two frame rods to be welded together respectively. The second cylinder clamp A includes a second cylinder A, a second rotating rod, a second pressing rod, and a second hinge rod. The second cylinder A is fixed on the second moving plate with its piston end extending upward and downward. Its cylinder barrel is embedded in the second moving plate and protrudes from the upper surface of the second moving plate. A second connecting block is fixed to the top of its cylinder barrel. The top of its piston end is rotatably connected to one end of the second rotating rod. The second pressing rod is fixed to the bottom of the other end of the second rotating rod. One end of the second hinge rod is rotatably connected to the second rotating rod and the other end is rotatably connected to the second connecting block;

[0015] The second fixed fixture includes a second fixed plate and a second cylinder clamp B. The second fixed plate is fixed to the middle of the first moving frame A, the first moving frame B, or the first moving frame C. The second cylinder clamp B is used to clamp the frame rod. The structure of the second cylinder clamp B is the same as that of the second cylinder clamp A.

[0016] Further, third electric lead screws and second slide bars are provided on both sides of the second fixture frame. The second moving frame A and the second moving frame C are respectively slidably connected to the third electric lead screw on one side and the second slide bar on the other side; Two fourth electric lead screws are provided on each of the second moving frame A, the second moving frame B, and the second moving frame C. The two second moving fixtures are respectively slidably connected to the two fourth electric lead screws.

[0017] Further, the welding frame includes a base and four support legs. The four support legs are fixed to the welding frame. A support plate is fixed to the upper parts of every two support legs. The two ends of the first fixture frame are rotatably arranged on the two support plates. A slide rail for the second fixture frame to slide is provided inside the support legs. Two third cylinders are fixed to the base. The piston ends of the two third cylinders are respectively fixedly connected to both sides of the second fixture frame and drive the second fixture frame to move along the slide rail.

[0018] Further, the second fixture frame includes two second support frames arranged in parallel and a first connecting frame. The first connecting frame is fixed to the same end of the two second support frames, and this end is denoted as end A. The other ends of the two second support frames are denoted as end B;

[0019] Two sets of movable conveying groups and one set of fixed conveying groups are fixed on the base. The two sets of movable conveying groups are respectively arranged on both sides of the second moving frame B. The movable conveying group includes a first conveying frame and a plurality of first conveying rollers arranged on the first conveying frame. The movable conveying group can be accommodated in the gap between the second moving frame A and the second moving frame B and can be accommodated in the gap between the second moving frame C and the second moving frame B. The fixed conveying group includes a second conveying frame and a plurality of second conveying rollers arranged on the second conveying frame. The fixed conveying group is arranged at the B end and extends out of the inside of the welding frame.

[0020] Furthermore, fixing blocks are fixed on both sides of the first conveying frame, and threaded holes are opened on the fixing blocks; fixing rods are respectively fixed on both sides of the welding frame, and a number of threaded holes are opened on the fixing rods. The fixing blocks can be fixed on the fixing rods by screws.

[0021] The beneficial effects of the present invention are:

[0022] In the present invention, two fixture groups are set to weld two armrest frames respectively, and then through the settings of rotation and up-and-down movement, the welding of the support rods is completed, realizing the welded forming of the sofa armrest frame; by setting the moving frames and moving fixtures, the welding of armrest frames of different sizes or irregular shapes is realized, meeting the modern personalized customization requirements; by setting the conveying groups, the conveying of the sofa armrest frame is realized, avoiding bumps and having high efficiency. Description of the Drawings

[0023] Figure 1 is a schematic structural diagram of the armrest frame welding device for sofa production of the present invention;

[0024] Figure 2 is a schematic structural diagram of the present invention with the welding robot omitted;

[0025] Figure 3 is a schematic structural diagram of the first fixture group in the present invention;

[0026] Figure 4 is a schematic structural diagram of the combination of the first moving frame A and the fixture in the present invention;

[0027] Figure 5 is a schematic structural diagram of the combination of the first moving frame B and the fixture in the present invention;

[0028] Figure 6 is a schematic structural diagram of the combination of the first moving frame C and the fixture in the present invention;

[0029] Figure 7 is a schematic structural diagram of the second fixture group in the present invention;

[0030] Figure 8It is a schematic structural diagram of the first moving fixture in the present invention;

[0031] Figure 9 It is another schematic structural diagram of the first moving fixture in the present invention;

[0032] Figure 10 It is a schematic structural diagram of the first moving frame A in the present invention;

[0033] Figure 11 It is a schematic structural diagram of the first fixed fixture in the present invention;

[0034] Figure 12 It is a schematic structural diagram of the first cylinder clamp A in the present invention;

[0035] Figure 13 It is a schematic structural diagram of the second moving fixture in the present invention;

[0036] Figure 14 It is a schematic structural diagram of the second fixed fixture in the present invention;

[0037] Figure 15 It is a schematic structural diagram of the combination of the welding frame and the conveying group in the present invention.

[0038] In the figure: 1, welding frame; 11, base; 12, support leg; 13, support plate; 14, slide rail; 2, fixture group; 21, fixture frame; 22, moving frame A; 23, moving frame B; 24, moving frame C; 25, moving fixture; 26, fixed fixture; 3, first welding robot; 4, second welding robot; 5, first fixture group; 51, first fixture frame; 52, first moving frame A; 53, first moving frame B; 54, first moving frame C; 55, first moving fixture; 551, first moving plate; 552, first cylinder clamping part A; 553, first cylinder pushing part; 554, first cushion block A; 555, extrusion block; 556, through hole A; 557, through hole B; 56, first fixed fixture; 561, first fixed plate; 562, first cylinder clamping part B; 563, first cushion block B; 57, first electric lead screw; 58, first slide bar; 59, second electric lead screw; 6, second fixture group; 61, second fixture frame; 611, second support frame; 612, first connecting frame; 62, second moving frame A; 63, second moving frame B; 64, second moving frame C; 65, second moving fixture; 651, second moving plate; 652, second cylinder clamping part A; 6521, second cylinder A; 6522, second rotating rod; 6523, second pressing rod; 6524, second hinge rod; 6525, second connecting block; 66, second fixed fixture; 661, second fixed plate; 662, second cylinder clamping part B; 67, third electric lead screw; 68, second slide bar; 69, fourth electric lead screw; 71, first cylinder A; 72, first rotating rod; 73, first pressing rod; 74, first hinge rod; 75, first connecting block; 8, third cylinder; 9, movable conveying group; 91, first conveying frame; 92, first conveying roller; 10, fixed conveying group; 101, second conveying frame; 102, second conveying roller; 93, fixed block; 94, threaded hole; 110, fixed rod. Detailed implementation mode

[0039] In order to make the technical problems, technical solutions and beneficial effects solved by the invention clearer and more understandable, the following further describes the invention in combination with the accompanying drawings and embodiments.

[0040] Embodiment 1

[0041] As Figure 1As shown in the figure, this embodiment provides a welding device for the armrest frame in sofa production, which includes a welding frame 1, two fixture groups 2, a first welding robot 3 and a second welding robot 4. The fixture group 2 includes a fixture frame 21, a moving frame A 22, a moving frame B 23 and a moving frame C 24. The middle of the fixture frame 21 is hollowed out. The moving frame A 22 and the moving frame C 24 are movably arranged on the fixture frame 21 and the moving direction is parallel to the length direction of the fixture frame 21. The moving frame B 23 is fixed in the middle of the fixture frame 21 and is arranged between the moving frame A 22 and the moving frame C 24. There are two groups of moving fixtures 25 and a set of fixed fixtures 26 fixed between the two moving fixtures 25 on the moving frame A 22, the moving frame B 23 and the moving frame C 24. The moving direction of the moving fixture 25 is parallel to the width direction of the fixture frame 21. The two ends of one fixture group 2 are rotatably arranged on the welding frame 1 and its moving fixture 25 is used to clamp the frame rod and the support rod. The other fixture group 2 is arranged below one fixture group 2 and can move up and down on the welding frame 1 and its moving fixture 25 is used to clamp the frame rod. The first welding robot 3 and the second welding robot 4 are respectively arranged on both sides of the welding frame 1.

[0042] There are six groups of moving fixtures 25 and three groups of fixed fixtures 26 on each fixture group 2. According to the specific shape of the frame, move the moving frame A 22, the moving frame C 24 and the moving fixtures 25 on the moving frame A 22, the moving frame B 23 and the moving frame C 24 respectively, move all the moving fixtures 25 to the appropriate positions, and then the fixed fixture 26 and the moving fixture 25 on the moving frame A 22 jointly clamp and fix a frame rod, the fixed fixture 26 and the moving fixture 25 on the moving frame C 24 jointly clamp and fix a frame rod, and the moving fixtures 25 on the moving frame A 22, the moving frame B 23 and the moving frame C 24 respectively clamp and fix two frame rods. When the frame is a regular rectangle, the moving fixtures 25 on the same side of the moving frame A 22, the moving frame B 23 and the moving frame C 24 are in a straight line. When the frame is an irregular quadrilateral, adjust the moving fixtures 25 on the same side of the moving frame A 22, the moving frame B 23 and the moving frame C 24 according to the shape of the frame rod, so that the three moving fixtures 25 can simultaneously clamp the frame rod of the irregular shape. Therefore, the fixture group 2 can clamp the armrest frame rods of different sizes or irregular shapes, adapt to the welding of more types and sizes of armrest frames, and meet the modern personalized customization requirements.

[0043] The first welding robot 3 and the second welding robot 4 respectively weld the frames on the two fixture groups 2. After the two quadrilateral frames are welded, the support rod is welded on one of the frames. Then, the upper fixture group 2 is rotated, and the lower fixture group 2 is moved upward to press the support rod between the two frames, and then welding is carried out. When the frame is a regular rectangle, the positions of the moving fixtures 25 on the two fixture groups 2 correspond up and down. When the upper fixture group 2 is rotated downward, the positions of the two frames can still be ensured to be symmetrical. When the frame is an irregular quadrilateral, the moving fixtures 25 on the two fixture groups 2 need to be mirror-corresponded so that the positions of the two frames can be ensured to be symmetrical when the upper fixture group 2 is rotated downward.

[0044] Embodiment 2

[0045] As Figures 1 to 15 shown, this embodiment provides a welding device for the armrest frame in sofa production, including a welding frame 1, a first fixture group 5, a second fixture group 6, a first welding robot 3 and a second welding robot 4. Both ends of the first fixture group 5 are rotatably arranged on the welding frame 1. The second fixture group 6 is arranged below the first fixture group 5 and can move up and down on the welding frame 1. The first welding robot 3 and the second welding robot 4 are used to weld the frames on the two fixture groups 2 and weld the support rod on the frame, and are preferably arranged on both sides of the welding frame 1.

[0046] As Figure 3 shown, the first fixture group 5 includes a first fixture frame 51, a first moving frame A 52, a first moving frame B 53 and a first moving frame C 54. The middle of the first fixture frame 51 is hollowed out and both ends are rotatably arranged on the welding frame 1. The first moving frame A 52 and the first moving frame C 54 are movably arranged on the first fixture frame 51 and the moving direction is parallel to the length direction of the first fixture frame 51. The first moving frame B 53 is fixed in the middle of the first fixture frame 51 and is arranged between the first moving frame A 52 and the first moving frame C 54. Two groups of first moving fixtures 55 and a group of first fixed fixtures 56 fixed between the two first moving fixtures 55 are arranged on the first moving frame A 52, the first moving frame B 53 and the first moving frame C 54. The moving direction of the first moving fixture 55 is parallel to the width direction of the first fixture frame 51.

[0047] Specifically, the first fixture frame 51 has a quadrilateral structure, and both ends are provided with rotating shafts. The first fixture frame 51 realizes the rotational connection with the welding frame 1 through the two rotating shafts. One of the rotating shafts is driven by a rotating motor, and the rotating motor can be fixed on the welding frame 1.

[0048] Referring Figure 3 , the position of the first moving frame B 53 is fixed, and the first moving frame A 52 and the first moving frame C 54 can move relative to the first moving frame B 53. Referring Figures 4 to 6, the position of the first fixed fixture 56 is fixed, and two groups of first moving fixtures 55 move relative to the first fixed fixture 56, thereby adjusting the distance between the two first moving fixtures 55 and between the first moving fixture 55 and the first fixed fixture 56, so as to fix the four frame rods and meet the clamping distance.

[0049] Reference Figure 7 , the second fixture group 6 includes a second fixture frame 61, a second moving frame A 62, a second moving frame B 63 and a second moving frame C 64. The middle of the second fixture frame 61 is hollowed out and can move up and down on the welding frame 1. The second moving frame A 62 and the second moving frame C 64 are movably arranged on the second fixture frame 61 and the moving direction is parallel to the length direction of the second fixture frame 61. The second moving frame B 63 is fixed in the middle of the second fixture frame 61 and is arranged between the second moving frame A 62 and the second moving frame C 64. Two groups of second moving fixtures 65 and a second fixed fixture 66 fixed between the two second moving fixtures 65 are arranged on the second moving frame A 62, the second moving frame B 63 and the second moving frame C 64. The moving direction of the second moving fixture 65 is parallel to the width direction of the second fixture frame 61.

[0050] The first fixed fixture 56 on the first moving frame B 53 and the second fixed fixture 66 on the second moving frame B 63 can be used to clamp the reinforcing bar inside the frame and weld the reinforcing bar inside the frame. Of course, not all armrest frames need to be welded with reinforcing bars, and welding can be carried out according to the actual situation. At the same time, in this embodiment, the clamping directions of the first fixed fixture 56 and the first fixed fixture 56 are fixed, so only the reinforcing bars at a specific angle can be welded.

[0051] Reference Figures 8 to 10 , the first moving fixture 55 includes a first moving plate 551, a first cylinder clamping part A 552, a first cylinder pushing part 553 and a first cushion block 554. The first moving plate 551 can move on the first moving frame A 52, the first moving frame B 53 and the first moving frame C 54. A through hole A 556 for the support rod to insert is opened in the middle of the first moving plate 551. Through holes B 557 corresponding to the position of the through hole A 556 up and down are opened on the first moving frame A 52, the first moving frame B 53 and the first moving frame C 54. The first cylinder clamping part A 552 is fixed on the first moving plate 551. The first cylinder clamping parts A 552 on the first moving frame A 52 and the first moving frame C 54 are used to clamp two frame rods to be welded together respectively. The cylinder barrel of the first cylinder pushing part 553 is fixed on the first moving plate 551, its piston end horizontally expands and contracts and an extrusion block 555 is fixed at the end. A first cushion block A 554 is fixed at the position where the first cylinder clamping part A 552 and the first cylinder pushing part 553 are not arranged on the first moving plate 551. The first cushion block A 554 avoids the through hole A 556, and the height of the first cushion block A 554 is the same as the height of the first cylinder pushing part 553.

[0052] Reference Figure 11 , the first fixing fixture 56 includes a first fixing plate 561, a first cylinder clamping member B562 and a first spacer B563. The first fixing plate 561 is fixed to the middle parts of the first moving frame A52, the first moving frame B53 and the first moving frame C54. The first cylinder clamping member B562 is used for clamping the frame rod. A first spacer B563 is fixed at the position on the first fixing plate 561 where the first cylinder clamping member B562 is not provided.

[0053] Two first cylinder clamping members A552 are provided on each of the first moving fixtures 55. The pressing directions of the first cylinder clamping members A552 are arranged according to the positions where the first moving fixtures 55 are located. For example, the two first cylinder clamping members A552 on each of the first moving fixtures 55 on the first moving frame A52 and the first moving frame C54 are in an orthogonal pressing state, respectively fixing two frame rods to be welded together. The first cylinder pushing members 553 thereon are at the four corner positions and cooperate with the first spacers 554 to squeeze the support rods passing through the through holes A556.

[0054] Two first cylinder clamping members B562 are provided on each of the first fixing fixtures 56. The two first cylinder clamping members B562 on the first fixing fixtures 56 on the first moving frame A52 and the first moving frame C54 are in a parallel pressing state, fixing the middle parts of the frame rods. The height of the first spacer A554 is the same as the height of the first cylinder pushing member 553, facilitating the border rods to be placed stably on the first moving fixtures 55.

[0055] Reference Figure 12 , the first cylinder clamping member A552 and the first cylinder clamping member B562 have the same structure, including a first cylinder A71, a first rotating rod 72, a first pressing rod 73 and a first hinge rod 74. The first cylinder A71 is fixed in position and its piston end extends upward and downward. A first connecting block 75 is fixed to the top of its cylinder barrel. The top of its piston end is rotatably connected to one end of the first rotating rod 72. The first pressing rod 73 is fixed to the bottom of the other end of the first rotating rod 72. One end of the first hinge rod 74 is rotatably connected to the first rotating rod 72 and the other end is rotatably connected to the first connecting block 75. With the above structure, the first rotating rod 72 and the first pressing rod 73 can rotate and lift, without affecting the removal of the border. The cylinder barrel of the first cylinder A71 is higher than the first spacer A554 and the first spacer B563. Therefore, the border rods can be limited between the two cylinder barrels, further facilitating clamping and fixing.

[0056] Reference Figure 3, on both sides of the first fixture rack 51, there are a first electric lead screw 57 and a first slide bar 58 respectively. The first moving frame A 52 and the first moving frame C 54 are respectively slidably connected to the first electric lead screw 57 on one side and the first slide bar 58 on the other side. There are two second electric lead screws 59 on the first moving frame A 52, the first moving frame B 53 and the first moving frame C 54, and two first moving fixtures 55 are respectively slidably connected to the two second electric lead screws 59.

[0057] Reference Figure 13 , the second moving fixture 65 includes a second moving plate 651 and a second cylinder clamp A 652. The second moving plate 651 is movable on the second moving frame A 62, the second moving frame B 63 and the second moving frame C 64. The second cylinder clamp A 652 on the second moving frame A 62 and the second moving frame C 64 is used to clamp two frame rods to be welded together respectively. The second cylinder clamp A 652 includes a second cylinder A 6521, a second rotating rod 6522, a second pressing rod 6523 and a second hinge rod 6524. The second cylinder A 6521 is fixed on the second moving plate 651 and its piston end extends upward and downward. Its cylinder barrel is embedded in the second moving plate 651 and protrudes from the upper surface of the second moving plate 651. A second connecting block 6525 is fixed at the top of its cylinder barrel. The top of its piston end is rotatably connected to one end of the second rotating rod 6522. The second pressing rod 6523 is fixed at the bottom of the other end of the second rotating rod 6522. One end of the second hinge rod 6524 is rotatably connected to the second rotating rod 6522 and the other end is rotatably connected to the second connecting block 6525; Reference Figure 14 , the second fixed fixture 66 includes a second fixed plate 661 and a second cylinder clamp B 662. The second fixed plate 661 is fixed in the middle of the first moving frame A 52, the first moving frame B 53 and the first moving frame C 54. The second cylinder clamp B 662 is used to clamp the frame rod. The structure of the second cylinder clamp B 662 is the same as that of the second cylinder clamp A 652.

[0058] Reference Figure 7 , on both sides of the second fixture rack 61, there are a third electric lead screw 67 and a second slide bar 68 respectively. The second moving frame A 62 and the second moving frame C 64 are respectively slidably connected to the third electric lead screw 67 on one side and the second slide bar 68 on the other side. There are two fourth electric lead screws 69 on the second moving frame A 62, the second moving frame B 63 and the second moving frame C 64, and two second moving fixtures 65 are respectively slidably connected to the two fourth electric lead screws 69.

[0059] Reference Figure 2, the welding rack 1 includes a base 11 and four support legs 12. The four support legs 12 are fixed to the welding rack 1. A support plate 13 is fixed to the upper parts of two pairs of the support legs 12. The two ends of the first jig rack 51 are rotatably arranged on the two support plates 13. A slide rail 14 for the second jig rack 61 to slide is arranged inside the support legs 12. Two third cylinders 8 are fixed to the base 11. The piston ends of the two third cylinders 8 are respectively fixedly connected to both sides of the second jig rack 61 and drive the second jig rack 61 to move along the slide rail 14.

[0060] Reference Figure 7 , the second jig rack 61 includes two second support frames 611 arranged in parallel and a first connecting frame 612. The first connecting frame 612 is fixed to the same end of the two second support frames 611, and this end is denoted as end A. The other ends of the two second support frames 611 are denoted as end B.

[0061] Reference Figure 15 , two sets of movable conveying groups 9 and one set of fixed conveying groups 10 are fixed to the base 11. The two sets of movable conveying groups 9 are respectively arranged on both sides of the second moving rack B63. The movable conveying group 9 includes a first conveying rack 91 and a plurality of first conveying rollers 92 arranged on the first conveying rack 91. The movable conveying group 9 can be accommodated in the gap between the second moving rack A62 and the second moving rack B63 and can be accommodated in the gap between the second moving rack C64 and the second moving rack B63. The fixed conveying group 10 includes a second conveying rack 101 and a plurality of second conveying rollers 102 arranged on the second conveying rack 101. The fixed conveying group 10 is arranged at end B and extends out of the inside of the welding rack 1.

[0062] Fixed blocks 93 are fixed to both sides of the first conveying rack 91. Threaded holes 94 are formed in the fixed blocks 93; Fixed rods 110 are respectively fixed to both sides of the welding rack 1. A number of threaded holes 94 are formed in the fixed rods 110. The fixed blocks 93 can be fixed to the fixed rods 110 by screws.

[0063] Working principle: 1) According to the actual shape of the frame, first adjust the positions of the first moving frame A52, the first moving frame C54, the second moving frame A62 and the second moving frame C64, and then adjust the positions of multiple first moving clamps 55 and second moving clamps 65. According to the positions of the second moving frame A62, the second moving frame B63 and the second moving frame C64, adjust the two sets of movable conveying groups 9 to the gaps between the second moving frame A62 and the second moving frame B63 and between the second moving frame C64 and the second moving frame B63 respectively; 2) Fix the four frame rods on the second fixture group 6, move the second fixture group 6 upward, and pass the support rods through the through holes A556 and through holes B557 from top to bottom in sequence until the bottom of the support rod abuts against the welding position of the frame rod. Fix the support rod between the extrusion block 555 and the first cushion block 554 by the first cylinder pusher 553 on the first fixture group 5. At this time, both the frame rod on the second fixture group 6 and the support rod on the first fixture group 5 are fixed. The first welding robot 3 welds the adjacent frame rods and the frame rod and the support rod in sequence; 3) After step 2) is completed, the second fixture group 6 moves downward with the welded semi-finished product. According to whether the frame is regular or not, adjust or do not adjust the positions of the first moving frame A52, the first moving frame C54 and the first moving clamp 55 on the first fixture group 5, and then clamp the four frame rods on the first fixture group 5. The second welding robot 4 welds the adjacent frame rods in sequence to form a frame, and then rotates the first fixture group 5 by 180 degrees, and then moves the second fixture group 6 upward until the top of the support rod abuts against the frame on the first fixture group 5. The second welding robot 4 welds the frame rod and the support rod in sequence; 4) After step 3) is completed, move the second fixture group 6 downward. The second fixture group 6 moves downward with the formed sofa armrest frame. When moving downward, all the second cylinder clamps A652 and second cylinder clamps B662 on the second fixture group 6 release the clamping. Since the two sets of movable conveying groups 9 are in the gaps between the second moving frame A62 and the second moving frame B63 and between the second moving frame C64 and the second moving frame B63, when the second fixture group 6 moves downward to a certain position, the formed sofa armrest frame is supported by the two sets of movable conveying groups 9. At this time, start the two sets of movable conveying groups 9, and the formed sofa armrest frame is conveyed by the two sets of movable conveying groups 9 to the fixed conveying group 10 until it is sent outside the welding rack 1, and the conveying is completed.

[0064] In the present invention, two fixture groups 2 are provided to weld two armrest frames respectively, and then through the settings of rotation and vertical movement, the welding of the support rods is completed, realizing the welding and forming of the sofa armrest frame; by setting the moving frame and the moving clamp 25, the welding of armrest frames with different sizes or irregular shapes is realized, meeting the modern personalized customization requirements; by setting the conveying group, the conveying of the sofa armrest frame is realized, avoiding bumps and having high efficiency.

[0065] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall fall within the protection scope of the present invention.

Claims

1. A sofa armrest frame welding device, characterized in that: The invention comprises a welding frame (1), two fixture groups (2), a first welding robot (3) and a second welding robot (4); the fixture group (2) comprises a fixture frame (21), a mobile frame A (22), a mobile frame B (23) and a mobile frame C (24); the middle part of the fixture frame (21) is hollowed out; the mobile frame A (22) and the mobile frame C (24) are movably arranged on the fixture frame (21) and the moving direction is parallel to the length direction of the fixture frame (21); the mobile frame B (23) is fixed in the middle part of the fixture frame (21) and is arranged between the mobile frame A (22) and the mobile frame C (24); the mobile frame A (22), the mobile frame B (23) and the mobile frame C (24) are arranged in a longitudinal direction of the fixture frame (21); The movable frame C (24) is provided with two groups of movable clamps (25) and a group of fixed clamps (26) fixed between the two movable clamps (25); the movable direction of the movable clamps (25) is parallel to the width direction of the clamp frame (21); both ends of one clamp group (2) are rotatably arranged on the welding frame (1), and its movable clamp (25) is used to clamp the frame rod and the support rod; the other clamp group (2) is arranged below one clamp group (2) and can move up and down on the welding frame (1), and its movable clamp (25) is used to clamp the frame rod; the first welding robot (3) and the second welding robot (4) are respectively arranged on both sides of the welding frame (1).

2. The armrest frame welding device for sofa production according to claim 1, characterized in that: The two clamp groups (2) are respectively a first clamp group (5) and a second clamp group (6); the two ends of the first clamp group (5) are rotatably arranged on the welding frame (1); the second clamp group (6) is arranged below the first clamp group (5) and is movable up and down on the welding frame (1); The first fixture group (5) comprises a first fixture frame (51), a first mobile frame A (52), a first mobile frame B (53) and a first mobile frame C (54); the middle part of the first fixture frame (51) is hollowed out and both ends are rotatably arranged on the welding frame (1); the first mobile frame A (52) and the first mobile frame C (54) are movably arranged on the first fixture frame (51) and the moving direction is parallel to the length direction of the first fixture frame (51); the first mobile frame B (53) is fixed at the middle part of the first fixture frame (51) and is arranged between the first mobile frame A (52) and the first mobile frame C (54); the first mobile frame A (52), the first mobile frame B (53) and the first mobile frame C (54) are each provided with two groups of first mobile fixtures (55) and a group of first fixed fixtures (56) fixed between the two first mobile fixtures (55); the moving direction of the first mobile fixture (55) is parallel to the width direction of the first fixture frame (51); The second clamp group (6) comprises a second clamp frame (61), a second movable frame A (62), a second movable frame B (63) and a second movable frame C (64); the middle part of the second clamp frame (61) is hollowed out and can move up and down on the welding frame (1); the second movable frame A (62) and the second movable frame C (64) are movably arranged on the second clamp frame (61) and the moving direction is parallel to the length direction of the second clamp frame (61); the second movable frame B (63) is fixed at the middle part of the second clamp frame (61) and is arranged between the second movable frame A (62) and the second movable frame C (64); the second movable frame A (62), the second movable frame B (63) and the second movable frame C (64) are each provided with two groups of second movable clamps (65) and a group of second fixed clamps (66) fixed between the two second movable clamps (65); the moving direction of the second movable clamps (65) is parallel to the width direction of the second clamp frame (61).

3. The armrest frame welding device for sofa production according to claim 2, characterized in that: The first movable fixture (55) comprises a first movable plate (551), a first cylinder clamping member A (552), a first cylinder pushing member (553) and a first cushion block (554); the first movable plate (551) is movable on the first movable frame A (52), the first movable frame B (53) and the first movable frame C (54); a through hole A (556) for inserting the support rod is provided in the middle of the first movable plate (551); a through hole B (557) corresponding to the upper and lower positions of the through hole A (556) is provided on the first movable frame A (52), the first movable frame B (53) and the first movable frame C (54); the first movable frame A (52) is provided with a plurality of through holes B (557) disposed on the first movable frame B (53) and the first movable frame C (54); 52) and the first movable frame C (54) are used to respectively clamp two frame rods to be welded together, the cylinder of the first cylinder push piece (553) is fixed on the first movable plate (551), the piston end thereof is horizontally retractable and an extrusion block (555) is fixed on the end thereof, the first cushion block A (554) is fixed at a position on the first movable plate (551) where the first cylinder clamp piece A (552) and the first cylinder push piece (553) are not provided, the first cushion block A (554) avoids the through hole A (556), and the height of the first cushion block A (554) is the same as the height of the first cylinder push piece (553); The first fixing fixture (56) comprises a first fixing plate (561), a first cylinder clamp B (562) and a first cushion block B (563); the first fixing plate (561) is fixed to the middle of the first moving frame A (52), the first moving frame B (53) and the first moving frame C (54); the first cylinder clamp B (562) is used to clamp the frame rod; and the first cushion block B (563) is fixed to a position on the first fixing plate (561) where the first cylinder clamp B (562) is not provided.

4. The armrest frame welding device for sofa production according to claim 3, characterized in that: The first cylinder clamp A (552) and the first cylinder clamp B (562) have the same structure, comprising a first cylinder A (71), a first rotating rod (72), a first pressure rod (73) and a first hinge rod (74). The first cylinder A (71) is fixed in position and its piston end is telescopic upward. Its cylinder barrel is higher than the first cushion block A (554) and the first cushion block B (563). A first connecting block (75) is fixed on the top of its cylinder barrel. The top of its piston end is rotatably connected to one end of the first rotating rod (72). The first pressure rod (73) is fixed to the bottom of the other end of the first rotating rod (72). One end of the first hinge rod (74) is rotatably connected to the first rotating rod (72) and the other end is rotatably connected to the first connecting block (75).

5. The armrest frame welding device for sofa production according to claim 3, characterized in that: A first electric screw (57) and a first sliding rod (58) are provided on both sides of the first clamp frame (51); the first moving frame A (52) and the first moving frame C (54) are respectively slidably connected to the first electric screw (57) on one side and the first sliding rod (58) on the other side; the first moving frame A (52), the first moving frame B (53) and the first moving frame C (54) are each provided with two second electric screws (59); the two first moving clamps (55) are respectively slidably connected to the two second electric screws (59).

6. The armrest frame welding device for sofa production according to claim 2, characterized in that: The second movable clamp (65) comprises a second movable plate (651) and a second cylinder clamp A (652). The second movable plate (651) is movable on the second movable frame A (62), the second movable frame B (63) and the second movable frame C (64). The second cylinder clamp A (652) on the second movable frame A (62) and the second movable frame C (64) is used to respectively clamp two frame rods to be welded together. The second cylinder clamp A (652) comprises a second cylinder A (6521), a second rotating rod (6522), a second pressing rod (6523) and a second hinge rod (6524). ), the second cylinder A (6521) is fixed on the second movable plate (651) and the piston end is extended upward, the cylinder barrel is embedded in the second movable plate (651) and protrudes from the upper surface of the second movable plate (651), the top of the cylinder barrel is fixed with a second connecting block (6525), the top of the piston end is rotatably connected to one end of the second rotating rod (6522), the second pressure rod (6523) is fixed to the bottom of the other end of the second rotating rod (6522), one end of the second hinge rod (6524) is rotatably connected to the second rotating rod (6522) and the other end is rotatably connected to the second connecting block (6525); The second fixing fixture (66) comprises a second fixing plate (661) and a second cylinder clamp B (662), wherein the second fixing plate (661) is fixed to the middle of the first moving frame A (52), the first moving frame B (53) and the first moving frame C (54), and the second cylinder clamp B (662) is used to clamp the frame rod, and the structure of the second cylinder clamp B (662) is the same as that of the second cylinder clamp A (652).

7. The armrest frame welding device for sofa production according to claim 6, characterized in that: A third electric screw (67) and a second sliding rod (68) are provided on both sides of the second clamp frame (61); the second movable frame A (62) and the second movable frame C (64) are respectively slidably connected to the third electric screw (67) on one side and the second sliding rod (68) on the other side; the second movable frame A (62), the second movable frame B (63) and the second movable frame C (64) are each provided with two fourth electric screws (69); the two second movable clamps (65) are respectively slidably connected to the two fourth electric screws (69).

8. The armrest frame welding device for sofa production according to claim 2, characterized in that: The welding frame (1) comprises a base (11) and four supporting legs (12), the four supporting legs (12) being fixed on the welding frame (1), a supporting plate (13) being fixed on the upper part of each of the supporting legs (12), the two ends of the first clamp frame (51) being rotatably arranged on the two supporting plates (13), the inner sides of the supporting legs (12) being provided with a slide rail (14) for the second clamp frame (61) to slide, and two third cylinders (8) being fixed on the base (11), the piston ends of the two third cylinders (8) being respectively fixedly connected to the two sides of the second clamp frame (61) and driving the second clamp frame (61) to move along the slide rail (14).

9. The armrest frame welding device for sofa production according to claim 8, characterized in that: The second clamp frame (61) comprises two second support frames (611) arranged in parallel and a first connecting frame (612), wherein the first connecting frame (612) is fixed to the same end of the two second support frames (611), which end is marked as end A, and the other end of the two second support frames (611) is marked as end B; Two groups of movable conveying groups (9) and one group of fixed conveying groups (10) are fixed on the base (11). The two groups of movable conveying groups (9) are respectively arranged on both sides of the second movable frame B (63). The movable conveying group (9) comprises a first conveying frame (91) and a plurality of first conveying rollers (92) arranged on the first conveying frame (91). The movable conveying group (9) can be accommodated in the gap between the second movable frame A (62) and the second movable frame B (63) and can be accommodated in the gap between the second movable frame C (64) and the second movable frame B (63). The fixed conveying group (10) comprises a second conveying frame (101) and a plurality of second conveying rollers (102) arranged on the second conveying frame (101). The fixed conveying group (10) is arranged at the B end and extends out of the welding frame (1).

10. The armrest frame welding device for sofa production according to claim 9, characterized in that: Fixed blocks (93) are fixed on both sides of the first conveying frame (91), and threaded holes (94) are provided on the fixed blocks (93); fixed rods (110) are fixed on both sides of the welding frame (1), and a plurality of threaded holes (94) are provided on the fixed rods (110); the fixed blocks (93) can be fixed to the fixed rods (110) by means of screws.

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