Furniture welding machine

Abstract

The invention discloses a furniture welding machine which comprises a feeding conveyor, a transverse moving mechanism, automatic welding machine mechanisms and a cutting device, at least two automatic welding machine mechanisms are connected to the transverse moving mechanism in a sliding mode, and the feeding conveyor is connected to one side of the transverse moving mechanism and used for feeding of the automatic welding machine mechanisms; the automatic welding machine mechanism comprises a lifting adjusting device and a fixed material welding device, and the fixed material welding device is connected to the lifting adjusting device. The fixed material welding device comprises a C-shaped welding frame, clamping devices, a rotary welding device and a power device, the two clamping devices are symmetrically connected in the C-shaped welding frame, and the rotary welding device is connected to the lower end of the C-shaped welding frame; the furniture welding machine is novel in structure, convenient and practical, the welding angle is adjusted through the lifting adjusting device, the welding position is controlled through the displacement lead screw, and the welding angle and the welding position are adjusted according to furniture mechanisms.

Description

Technical Field

[0001] The invention belongs to the technical field of furniture welding, and in particular relates to a furniture welding machine. Background Art

[0002] Furniture welding is an important part of the furniture manufacturing process, especially for furniture that uses metal or metal frames. Furniture welding mainly involves connecting metal parts together through heat or other forms of energy to form a strong and stable structure; there are two traditional welding methods. One is that the operator welds according to the drawings, but this welding speed is more harmful to the workers' bodies. The other is to use a robot for welding, but this welding method requires manual fixation of the welded object and requires the use of corresponding furniture and fixtures, which makes it impossible to reduce production costs. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a furniture welding machine which has a novel structure, is convenient and practical, and can adjust the welding angle through a lifting and adjusting device, and control the welding position through a displacement screw rod, so as to adjust the welding angle and welding position according to the structure of the furniture.

[0004] A furniture welding machine comprises a feeding conveyor, a transverse movement mechanism, an automatic welding machine mechanism and a cutting device, at least one of the automatic welding machine mechanisms is slidably connected to the transverse movement mechanism, the feeding conveyor is connected to one side of the transverse movement mechanism and is used for feeding the automatic welding machine mechanism; the automatic welding machine mechanism comprises a lifting and adjusting device and a fixed material welding device, the fixed material welding device is connected to the lifting and adjusting device; the fixed material welding device comprises a C-shaped welding frame, a clamping device, a rotary welding device and a power device, two of the clamping devices are symmetrically connected in the C-shaped welding frame, the rotary welding device is connected to the lower end of the C-shaped welding frame, the power device is installed on the C-shaped welding frame and is transmission-connected to the rotary welding device; the clamping device comprises a clamping cylinder, a clamping plate, a rotating shaft and a clamping roller, at least one of the clamping cylinders is connected to the C-shaped welding frame and the piston rod is connected to the clamping plate, a plurality of the rotating shafts are evenly connected to the clamping plate, and the clamping roller is connected to the rotating shaft.

[0005] Furthermore, the rotary welding device includes a C-shaped rotating plate, an eccentric rod, a gear ring, a rotating bearing, bolts and an adjusting welding device, a plurality of the eccentric rods are connected to the C-shaped welding frame by bolts, the rotating bearing is sleeved on the eccentric rod, the gear ring is sleeved on the rotating bearing and is connected to limit rings on the upper and lower sides for limiting the C-shaped rotating plate, the inner wall of the C-shaped rotating plate is provided with teeth that mesh with the gear ring, and two adjusting welding devices are symmetrically installed on the C-shaped rotating plate.

[0006] Furthermore, the adjusting welding device includes an adjusting welding device including a fixed block, a welding adjustment motor, a welding wire adjustment tube, a turbine, an articulated adjustment seat, an articulated rod, an inclination adjustment seat and a welding nozzle, the fixed block is connected to the upper side of the C-type rotating plate, one end of the welding wire adjustment tube passes through the fixed block and the C-type rotating plate and is hinged to the inclination adjustment seat, the welding adjustment motor is installed on the fixed block and the power rod is connected to the turbine, the articulated adjustment seat is connected to the lower side of the C-type rotating plate, the two ends of the articulated rod are respectively hinged on the articulated adjustment seat and the inclination adjustment seat, the welding nozzle is connected to the inclination adjustment seat, the inclination adjustment seat is provided with a welding wire hole connecting the welding wire adjustment tube and the welding nozzle, and the welding wire adjustment tube is provided with a worm gear matching the turbine.

[0007] Furthermore, the power device includes a welding motor, a welding main synchronous wheel, a welding auxiliary synchronous wheel, a bearing, a rotating rod, a gear and a synchronous belt. The welding motor is connected to a C-shaped welding frame and the power rod is connected to the welding main synchronous wheel. The rotating rod is connected to the C-shaped welding frame through a bearing. The welding auxiliary synchronous wheel and the gear are respectively connected to both ends of the rotating rod. The welding auxiliary synchronous wheel is connected to the welding main synchronous wheel through a synchronous belt, and the gear is meshed with the teeth on the inner wall of the C-shaped rotating plate.

[0008] Furthermore, it also includes an adjustable C-shaped welding frame and a lifting cylinder, the adjustable C-shaped welding frame is slidably connected to the upper end of the C-shaped welding frame, the lifting cylinder is connected to the adjustable C-shaped welding frame and the piston rod is connected to the C-shaped welding frame, the end of the adjustable C-shaped welding frame away from the C-shaped welding frame is connected to a rotary welding device, and one side of the adjustable C-shaped welding frame is connected to a power device transmission-connected to the rotary welding device.

[0009] Furthermore, a CCD high-definition camera is installed on the inclination adjustment seat.

[0010] Furthermore, the lifting and adjusting device includes a transverse frame, a lifting motor, a lifting screw, a lifting frame, a displacement motor, a main synchronous wheel, a secondary synchronous wheel, a displacement screw, a displacement frame, a first oil cylinder, a second oil cylinder, a third oil cylinder and a displacement synchronous belt, the lifting screw is movably connected to the transverse frame, the lifting frame is slidably connected to the transverse frame and is transmission-connected to the lifting screw, the lifting motor is installed on the transverse frame and the power rod is connected to one end of the lifting screw, the displacement frame is slidably connected to the lifting frame, and the displacement motor is connected to the lifting frame. The power rod is connected to the main synchronous wheel, the displacement screw is movably connected to the lifting frame and is transmission connected to the displacement frame, the auxiliary synchronous wheel is connected to one end of the displacement screw and is transmission connected to the main synchronous wheel through a displacement timing belt, one end of the first oil cylinder and the second oil cylinder are both hinged on the lifting frame, the first oil cylinder piston rod is hinged on the second oil cylinder, both ends of the third oil cylinder are respectively hinged on the second oil cylinder piston rod and the fixed material welding device, one end of the lifting frame is hinged to the middle of the fixed material welding device and an angle sensor is arranged at the intersection.

[0011] Furthermore, a conveying and clamping cylinder is symmetrically mounted on the transverse frame, a roller conveyor is connected to the piston of the conveying and clamping cylinder, and the roller conveyor is slidably connected to the transverse frame.

[0012] Furthermore, a damper is installed on the clamping plate, and the damper cooperates with the clamping roller.

[0013] Furthermore, the clamping roller is provided with an orientation groove.

[0014] Beneficial effects:

[0015] (1) The furniture welding machine of the present invention has a novel structure, is convenient and practical, and can adjust the welding angle through a lifting and adjusting device, and control the welding position through a displacement screw rod, so as to adjust the welding angle and welding position according to the structure of the furniture.

[0016] (2) A furniture welding machine of the present invention welds the two ends of a material by means of a C-shaped welding frame and a rotary welding device on the C-shaped welding frame. The distance between the two rotary welding devices is adjusted by a lifting cylinder to adjust the welding distance according to the length of the welding material, thereby achieving the effect of synchronous welding of the upper and lower ends.

[0017] (3) A furniture welding machine of the present invention drives the C-shaped rotating plate to rotate through a power device, so that two welding nozzles rotate synchronously. At the same time, by adjusting the height of the welding wire adjustment tube, the welding angle of the welding nozzle is changed, thereby achieving the adjustment of the welding angle and height according to the situation of the welding point.

[0018] (4) A furniture welding machine of the present invention transports the pipe material to the fixed material welding device through a feeding conveyor, and then fixes the pipe material through a clamping device, thereby realizing the two actions of furniture welding and feeding, reducing the use of jigs during welding, and thus reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a welding machine;

[0020] Figure 2 It is a structural schematic diagram of the automatic welding machine mechanism;

[0021] Figure 3 It is a structural schematic diagram of the lifting and lowering adjustment device;

[0022] Figure 4 is a schematic diagram of the structure of the lifting frame;

[0023] Figure 5 It is a schematic diagram of the back structure of the material setting welding device;

[0024] Figure 6 It is a schematic diagram of the front structure of the material-fixing welding device;

[0025] Figure 7 is a schematic diagram of the structure of the clamping device;

[0026] Figure 8 It is a schematic diagram of the structure of the power unit;

[0027] Fig. 9 It is a structural schematic diagram of a rotary welding device;

[0028] Fig.10 It is a structural schematic diagram of a C-type transfer plate;

[0029] 1-feeding conveyor, 2-transverse movement mechanism, 3-automatic welding machine mechanism, 4-lifting and adjusting device, 41-transverse movement frame, 42-lifting motor, 43-lifting screw rod, 44-lifting frame, 45-displacement motor, 46-main synchronous wheel, 47-secondary synchronous wheel, 48-displacement screw rod, 49-displacement frame, 410-first oil cylinder, 411-second oil cylinder, 412-third oil cylinder, 5-fixed material welding device, 51-C-type welding frame, 52-clamping device, 53-rotating welding device, 54-power device, 55-clamping air Cylinder, 56-clamping plate, 57-rotating shaft, 58-clamping roller, 59-welding motor, 510-welding main synchronous wheel, 511-welding auxiliary synchronous wheel, 512-bearing, 513-rotating rod, 514-gear, 515-C-type rotating plate, 516-eccentric rod, 517-gear ring, 518-fixed block, 519-welding adjustment motor, 520-welding wire adjustment tube, 521-turbine, 522-articulated adjustment seat, 523-articulated rod, 524-inclination adjustment seat, 525-welding nozzle, 526-rotating bearing. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are further described below in conjunction with the accompanying drawings.

[0031] Example 1

[0032] like Figures 1 to 10 As shown; a furniture welding machine, including a feeding conveyor 1, a transverse movement mechanism 2, an automatic welding machine mechanism 3 and a cutting device, at least one of the automatic welding machine mechanisms 3 is slidably connected to the transverse movement mechanism 2, the feeding conveyor 1 is connected to one side of the transverse movement mechanism 2 and is used for feeding the automatic welding machine mechanism 3; the automatic welding machine mechanism 3 includes a lifting adjustment device 4 and a fixed material welding device 5, the fixed material welding device 5 is connected to the lifting adjustment device 4; the fixed material welding device 5 includes a C-shaped welding frame 51, a clamping device 52, a rotating welding device 53 and a power device 54, The two clamping devices 52 are symmetrically connected in the C-shaped welding frame 51, the rotary welding device 53 is connected to the lower end of the C-shaped welding frame 51, and the power device 54 is installed on the C-shaped welding frame 51 and is transmission-connected to the rotary welding device 53; the clamping device 52 includes a clamping cylinder 55, a clamping plate 56, a rotating shaft 57 and a clamping roller 58, at least one of the clamping cylinders 55 is connected to the C-shaped welding frame 51 and the piston rod is connected to the clamping plate 56, a plurality of rotating shafts 57 are evenly connected to the clamping plate 56, and the clamping roller 58 is connected to the rotating shaft 57.

[0033] Among them, the feeding conveyor 1 is equipped with a cutting device, a clamping device, a measuring device and a displacement device, the displacement device is connected to the measuring head of the measuring device, and the measuring head of the measuring device is connected to an infrared positioning sensor; the transverse movement mechanism 2 includes a fixed frame, a transverse movement motor and a transverse movement screw, a plurality of the transverse movement screws are movably connected to the fixed frame and are transmission-connected to the corresponding automatic welding machine mechanism 3, a plurality of the transverse movement motors are installed on the fixed frame and the power rod is connected to the transverse movement screw.

[0034] Specifically, the pipe material is placed on the feeding conveyor 1, and the infrared positioning sensor is driven to move by the displacement device, and the moving position of the infrared positioning sensor is determined by the measuring device, and then the infrared positioning sensor is used to sense the movement of the pipe material to the specified cutting position, and then the pipe material is fixed by the clamping device, and finally the material is cut by the cutting device; after the pipe material is cut, the fixed material welding device 5 is driven to rotate by the lifting and adjusting device 4, so that the C-shaped welding frame 51 rotates to a horizontal state, and then the fixed material welding device 5 is driven to rise and fall ... The receiving frame 51 is aligned with the feeding conveyor 1. The pipe material after cutting is transported to between the two clamping devices 52 by the feeding conveyor 1. The clamping plate 56 is driven to move by the clamping cylinder 55 to control the distance between the clamping rollers 58 on the two clamping devices 52, so that the pipe material is transported to between the clamping rollers 58 on the two clamping devices 52. Finally, the clamping cylinder 55 drives the clamping plate 56 to continue to move to clamp the pipe material. Then the lifting and adjusting device 4 drives the fixed material welding device 5 to move to the specified welding position and place it at a good angle. Finally, the pipe is welded by the rotary welding device 53.

[0035] In another embodiment of the present invention, the rotary welding device 53 includes a C-shaped rotating plate 515, an eccentric rod 516, a gear ring 517, a rotating bearing 526, bolts and an adjusting welding device. Several eccentric rods 516 are connected to the C-shaped welding frame 51 by bolts. The rotating bearing 526 is sleeved on the eccentric rod 516. The gear ring 517 is sleeved on the rotating bearing 526 and is connected to limit rings for limiting the C-shaped rotating plate 515 on the upper and lower sides. Teeth that mesh with the gear ring 517 are arranged on the inner wall of the C-shaped rotating plate 515. Two adjusting welding devices are symmetrically installed on the C-shaped rotating plate 515.

[0036] Specifically, the rotating bearing 526 is used to ensure the free rotation of the ring gear 517, and the ring gear 517 is used to ensure the free rotation of the C-type rotating plate 515, so that the two adjusting welding devices cooperate to weld the 180-degree welding area of ​​the pipe material respectively. The bolt passes through the eccentric rod 516 area to deviate from the axis so that the rotation center of the C-type rotating plate 515 can be adjusted to be roughly the same as the center of the pipe material, which is convenient for adjusting the welding device to perform welding work. If the position difference is too large, the welding will have a certain deviation, which will affect the welding aesthetics and welding strength.

[0037] In another embodiment of the present invention, the adjustable welding device includes a fixed block 518, a welding adjustment motor 519, a welding wire adjustment tube 520, a turbine 521, a hinged adjustment seat 522, a hinged rod 523, a tilt adjustment seat 524 and a welding nozzle 525, wherein the fixed block 518 is connected to the upper side of the C-type rotating plate 515, one end of the welding wire adjustment tube 520 passes through the fixed block 518 and the C-type rotating plate 515 and is hinged to the tilt adjustment seat 524, and the welding adjustment The motor 519 is installed on the fixed block 518 and the power rod is connected to the turbine 521. The articulated adjustment seat 522 is connected to the lower side of the C-shaped rotating plate 515. The two ends of the articulated rod 523 are respectively hinged on the articulated adjustment seat 522 and the inclination adjustment seat 524. The welding nozzle 525 is connected to the inclination adjustment seat 524. The inclination adjustment seat 524 is provided with a welding wire hole connecting the welding wire adjustment tube 520 and the welding nozzle 525. The welding wire adjustment tube 520 is provided with a worm gear that cooperates with the turbine 521.

[0038] Specifically, the welding adjustment motor 519 drives the turbine 521 to rotate, and the turbine 521 cooperates with the worm gear to drive the welding wire adjustment tube 520 to rise and fall. The rising and falling of the welding wire adjustment tube 520 will change the angle of the inclination adjustment seat 524, and the angle of the welding line derived from the welding nozzle 525 is changed, thereby controlling the welding angle of the welding line, and at the same time controlling the welding angle and changing the welding height.

[0039] In another embodiment of the present invention, the power device 54 includes a welding motor 59, a welding main synchronous wheel 510, a welding auxiliary synchronous wheel 511, a bearing 512, a rotating rod 513, a gear 514 and a synchronous belt. The welding motor 59 is connected to the C-shaped welding frame 51 and the power rod is connected to the welding main synchronous wheel 510. The rotating rod 513 is connected to the C-shaped welding frame 51 through the bearing 512. The welding auxiliary synchronous wheel 511 and the gear 514 are respectively connected to both ends of the rotating rod 513. The welding auxiliary synchronous wheel 511 is connected to the welding main synchronous wheel 510 through a synchronous belt. The gear 514 is meshed with the teeth on the inner wall of the C-shaped rotating plate 515.

[0040] Specifically, the welding motor 59 drives the welding main synchronous wheel 510, and the welding main synchronous wheel 510 drives the welding auxiliary synchronous wheel 511 to rotate through the synchronous belt. The welding auxiliary synchronous wheel 511 drives the rotating rod 513 to rotate, and the rotating rod 513 drives the gear 514 to rotate. The gear 514 cooperates with the teeth on the inner wall of the C-type rotating plate 515, so that the C-type rotating plate 515 rotates and the adjusting welding device thereon rotates positive 90 degrees and negative 90 degrees respectively. The two adjusting welding devices rotate 180 degrees each, completing 360 degrees of welding work around the pipe material.

[0041] In another embodiment of the present invention, it also includes an adjustable C-shaped welding frame and a lifting cylinder, wherein the adjustable C-shaped welding frame is slidably connected to the upper end of the C-shaped welding frame 51, the lifting cylinder is connected to the adjustable C-shaped welding frame and the piston rod is connected to the C-shaped welding frame 51, a rotary welding device 53 is connected to the end of the adjustable C-shaped welding frame away from the C-shaped welding frame 51, and a power device 54 that is transmission-connected to the rotary welding device 53 is connected to one side of the adjustable C-shaped welding frame; a CCD high-definition camera is installed on the inclination adjustment seat 524.

[0042] Specifically, the C-shaped welding frame is driven to rise and fall by the lifting cylinder, so that the distance between the rotary welding device 53 at one end of the C-shaped welding frame and the C-shaped welding frame 51 is changed, so as to adjust the distance between the two rotary welding devices 53 according to the length of the pipe material and realize the purpose of welding at both ends of the pipe; the pipe welding condition and welding status are monitored by the CCD high-definition camera, and the CCD high-definition camera is installed on the inclination adjustment seat 524, and the observation angle can change with the change of its angle.

[0043] In another embodiment of the present invention, the lifting and adjusting device 4 includes a transverse frame 41, a lifting motor 42, a lifting screw rod 43, a lifting frame 44, a displacement motor 45, a main synchronous wheel 46, a secondary synchronous wheel 47, a displacement screw rod 48, a displacement frame 49, a first oil cylinder 410, a second oil cylinder 411, a third oil cylinder 412 and a displacement synchronous belt, the lifting screw rod 43 is movably connected to the transverse frame 41, the lifting frame 44 is slidably connected to the transverse frame 41 and is transmission-connected to the lifting screw rod 43, the lifting motor 42 is installed on the transverse frame 41 and the power rod is connected to one end of the lifting screw rod 43, the displacement frame 49 is slidably connected to the lifting frame 44, and the displacement motor The machine 45 is connected to the lifting frame 44 and the power rod is connected to the main synchronous wheel 46. The displacement screw rod 48 is movably connected to the lifting frame 44 and is transmission-connected to the displacement frame 49. The secondary synchronous wheel 47 is connected to one end of the displacement screw rod 48 and is transmission-connected to the main synchronous wheel 46 through a displacement synchronous belt. One end of the first oil cylinder 410 and the second oil cylinder 411 are both hinged on the lifting frame 44. The piston rod of the first oil cylinder 410 is hinged on the second oil cylinder 411. Both ends of the third oil cylinder 412 are hinged on the piston rod of the second oil cylinder 411 and the fixed material welding device 5 respectively. One end of the lifting frame 44 is hinged to the middle of the fixed material welding device 5 and an angle sensor is provided at the intersection.

[0044] Specifically, the lifting motor 42 drives the lifting screw 43 to rotate, the lifting screw 43 drives the lifting frame 44 to move up and down, the displacement motor 45 drives the main synchronous wheel 46 to rotate, the main synchronous wheel 46 drives the secondary synchronous wheel 47 to rotate through the displacement synchronous belt, the secondary synchronous wheel 47 drives the displacement screw 48 to rotate, and the rotation of the displacement screw 48 drives the displacement frame 49 to perform telescopic movement; the angle of the second oil cylinder 411 is adjusted by the first oil cylinder 410, and the second oil cylinder 411 adjusts the position of one end of the third oil cylinder 412, so that the third oil cylinder 412 can adjust the angle of the C-type welding frame 51 to a horizontal state without interference, so as to adjust the welding angle, the placement angle of the pipe welding and the state of the pipe material entering the fixed material welding device 5 according to the structure of the furniture, and determine the rotation angle of the C-type welding frame 51 by the angle sensor.

[0045] In another embodiment of the present invention, the lateral moving frame 41 is symmetrically mounted with conveying and clamping cylinders, the pistons of the conveying and clamping cylinders are connected to roller conveyors, and the roller conveyors are slidably connected to the lateral moving frame 41 .

[0046] Specifically, the conveying and clamping cylinder drives the roller conveyor to move, so that the two roller conveyors cooperate to provide a conveying force for clamping the pipe material, so that the pipe material can smoothly enter the C-shaped welding frame 51 and be clamped by the two clamping devices 52.

[0047] In another embodiment of the present invention, a damper is installed on the clamping plate 56 , and the damper cooperates with the clamping roller 58 ; and an orientation groove is provided on the clamping roller 58 .

[0048] The damper is used to control the clamping rollers 58 to rotate too smoothly, so that the pipe material will not be blocked when entering the two clamping devices 52, and the pipe material will not roll out when clamped by the two clamping devices 52; the direction of the pipe material is guaranteed by the directional groove, which is mainly used for welding some non-circular pipes, and the pipe is supported after entering the directional grooves of the clamping rollers 58 on both sides to avoid the position of the pipe changing after entering the clamping rollers 58 on both sides.

[0049] When welding non-circular pipes, it is necessary to pre-adjust the welding device to spot weld the welding points of the non-circular pipes, fix the pipes by spot welding, release the two clamping devices 52, and then control the welding device to move along a straight line through the lifting and adjusting device 4 to complete the purpose of welding along the pipe welding line.

[0050] The specific embodiments of the present invention are described in detail above, but they are only examples, and the present invention is not limited to the specific embodiments described above. For those skilled in the art, any equivalent modifications and substitutions made to the present invention are also within the scope of the present invention. Therefore, the equalization changes and modifications made without departing from the spirit and scope of the present invention are all within the scope of the present invention.

Claims

1. A furniture welding machine, characterized in that: The invention comprises a feeding conveyor (1), a transverse movement mechanism (2), an automatic welding mechanism (3) and a cutting device, wherein at least one of the automatic welding mechanisms (3) is slidably connected to the transverse movement mechanism (2), the feeding conveyor (1) is connected to one side of the transverse movement mechanism (2) and is used to feed the automatic welding mechanism (3); the automatic welding mechanism (3) comprises a lifting and adjusting device (4) and a fixed material welding device (5), the fixed material welding device (5) is connected to the lifting and adjusting device (4); the fixed material welding device (5) comprises a C-shaped welding frame (51), a clamping device (52), a rotating welding device (53) and a power device (54), the two clamping devices (54) are connected to the lifting and adjusting device (4); The device (52) is symmetrically connected in a C-shaped welding frame (51), the rotary welding device (53) is connected to the lower end of the C-shaped welding frame (51), and the power device (54) is installed on the C-shaped welding frame (51) and is transmission-connected to the rotary welding device (53); the clamping device (52) comprises a clamping cylinder (55), a clamping plate (56), a rotating shaft (57) and a clamping roller (58), at least one of the clamping cylinders (55) is connected to the C-shaped welding frame (51) and the piston rod is connected to the clamping plate (56), a plurality of rotating shafts (57) are evenly connected to the clamping plate (56), and the clamping roller (58) is connected to the rotating shaft (57).

2. A furniture welding machine as claimed in claim 1, characterized in that: The rotary welding device (53) comprises a C-shaped rotating plate (515), an eccentric rod (516), a gear ring (517), a rotating bearing (526), ​​bolts and an adjusting welding device. A plurality of the eccentric rods (516) are connected to the C-shaped welding frame (51) by bolts. The rotating bearing (526) is sleeved on the eccentric rod (516). The gear ring (517) is sleeved on the rotating bearing (526) and is connected to limit rings for limiting the C-shaped rotating plate (515) on the upper and lower sides. Teeth that mesh with the gear ring (517) are provided on the inner wall of the C-shaped rotating plate (515). Two adjusting welding devices are symmetrically mounted on the C-shaped rotating plate (515).

3. A furniture welding machine as claimed in claim 2, characterized in that: The adjustable welding device comprises a fixed block (518), a welding adjustment motor (519), a welding wire adjustment tube (520), a turbine (521), an articulated adjustment seat (522), an articulated rod (523), an inclination adjustment seat (524) and a welding nozzle (525), wherein the fixed block (518) is connected to the upper side of the C-shaped rotating plate (515), one end of the welding wire adjustment tube (520) passes through the fixed block (518) and the C-shaped rotating plate (515) and is articulated with the inclination adjustment seat (524), and the welding adjustment motor (519) is connected to the upper side of the C-shaped rotating plate (515). The power rod (521) is installed on the fixed block (518), and the articulated adjustment seat (522) is connected to the lower side of the C-shaped rotating plate (515). The two ends of the articulated rod (523) are respectively articulated on the articulated adjustment seat (522) and the inclination adjustment seat (524). The welding nozzle (525) is connected to the inclination adjustment seat (524). The inclination adjustment seat (524) is provided with a welding wire hole connecting the welding wire adjustment tube (520) and the welding nozzle (525). The welding wire adjustment tube (520) is provided with a worm gear matched with the turbine (521).

4. A furniture welding machine as claimed in claim 1 or 3, characterized in that: The power device (54) comprises a welding motor (59), a welding main synchronous wheel (510), a welding auxiliary synchronous wheel (511), a bearing (512), a rotating rod (513), a gear (514) and a synchronous belt. The welding motor (59) is connected to the C-shaped welding frame (51) and the power rod is connected to the welding main synchronous wheel (510). The rotating rod (513) is connected to the C-shaped welding frame (51) through the bearing (512). The welding auxiliary synchronous wheel (511) and the gear (514) are respectively connected to two ends of the rotating rod (513). The welding auxiliary synchronous wheel (511) is connected to the welding main synchronous wheel (510) through the synchronous belt. The gear (514) is meshed with teeth on the inner wall of the C-shaped rotating plate (515).

5. A furniture welding machine as claimed in claim 4, characterized in that: The invention also comprises an adjustable C-shaped welding frame and a lifting cylinder, wherein the adjustable C-shaped welding frame is slidably connected to the upper end of the C-shaped welding frame (51), the lifting cylinder is connected to the adjustable C-shaped welding frame and the piston rod is connected to the C-shaped welding frame (51), a rotary welding device (53) is connected to one end of the adjustable C-shaped welding frame away from the C-shaped welding frame (51), and a power device (54) drivingly connected to the rotary welding device (53) is connected to one side of the adjustable C-shaped welding frame.

6. A furniture welding machine as claimed in claim 5, characterized in that: A CCD high-definition camera is installed on the inclination adjustment seat (524).

7. A furniture welding machine according to claim 1 or 6, characterized in that: The lifting and adjusting device (4) comprises a transverse frame (41), a lifting motor (42), a lifting screw (43), a lifting frame (44), a displacement motor (45), a main synchronous wheel (46), a secondary synchronous wheel (47), a displacement screw (48), a displacement frame (49), a first oil cylinder (410), a second oil cylinder (411), a third oil cylinder (412) and a displacement synchronous belt. The lifting screw (43) is movably connected to the transverse frame (41), the lifting frame (44) is slidably connected to the transverse frame (41) and is transmission-connected to the lifting screw (43), the lifting motor (42) is mounted on the transverse frame (41) and the power rod is connected to one end of the lifting screw (43), the displacement frame (49) is slidably connected to the lifting frame (44), and the displacement motor ( 45) is connected to the lifting frame (44) and the power rod is connected to the main synchronous wheel (46), the displacement screw rod (48) is movably connected to the lifting frame (44) and is transmission-connected to the displacement frame (49), the auxiliary synchronous wheel (47) is connected to one end of the displacement screw rod (48) and is transmission-connected to the main synchronous wheel (46) through a displacement synchronous belt, one end of the first oil cylinder (410) and the second oil cylinder (411) are both hinged to the lifting frame (44), the piston rod of the first oil cylinder (410) is hinged to the second oil cylinder (411), the two ends of the third oil cylinder (412) are respectively hinged to the piston rod of the second oil cylinder (411) and the fixed material welding device (5), one end of the lifting frame (44) is hinged to the middle of the fixed material welding device (5) and an angle sensor is arranged at the intersection.

8. A furniture welding machine as claimed in claim 7, characterized in that: A conveying and clamping cylinder is symmetrically mounted on the transverse moving frame (41), a roller conveyor is connected to the piston of the conveying and clamping cylinder, and the roller conveyor is slidably connected to the transverse moving frame (41).

9. A furniture welding machine as claimed in claim 8, characterized in that: A damper is installed on the clamping plate (56), and the damper cooperates with the clamping roller (58).

10. A furniture welding machine as claimed in claim 1 or 9, characterized in that: The clamping roller (58) is provided with an orientation groove.

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