Automatic welding equipment for metal chair legs

Abstract

The present invention provides an automatic welding device for metal chair legs, comprising an automatic welding manipulator installed on a base plate, the automatic welding manipulator being provided with a welding gun, and being characterized in that a bracket is fixed on the base plate, a rotating shaft is vertically rotatably arranged on the bracket, the lower end of the rotating shaft is connected to a power structure that can drive the rotating shaft, the upper end of the rotating shaft is connected to a rotating table, a positioning seat is fixed on the rotating table, a positioning groove for positioning a substrate is provided on the positioning seat, a clearance notch connected to the positioning groove is also provided on the positioning seat, a cylinder is fixed on the rotating table through a mounting frame, and the piston rod of the cylinder is vertically downward, the end of the piston rod of the cylinder is connected to a clamping block for clamping a round tube, and a substrate feeding mechanism and a round tube feeding mechanism are also provided on the base plate.

Description

Technical Field

[0001] The invention belongs to the technical field of machinery and relates to automatic welding equipment for metal chair legs. Background Art

[0002] A chair is a piece of furniture for daily life, a kind of seat with a backrest and armrests. Modern chairs pursue beauty and fashion. Some chairs are no longer just seats. With the combination of technology, they make human life more convenient.

[0003] The metal chair leg is one of the components of the chair. In the existing metal chair leg welding device, it is necessary to manually place the base plate and the round tube and then weld them, which cannot realize automated operation. Therefore, it is necessary to design an automatic welding equipment for metal chair legs. Summary of the Invention

[0004] The purpose of the present invention is to solve the above problems in the existing technology and to provide an automatic welding device for metal chair legs.

[0005] The objectives of the present invention can be achieved through the following technical solutions: an automatic welding equipment for metal chair legs, comprising an automatic welding robot installed on a base plate, the automatic welding robot having a welding gun, characterized in that a bracket is fixed on the base plate, a rotating shaft is arranged on the bracket for vertical rotation, the lower end of the rotating shaft is connected to a power structure that can drive it to rotate, the upper end of the rotating shaft is connected to a rotating table, a positioning seat is fixed on the rotating table, a positioning slot for positioning the substrate is provided on the positioning seat, and a clearance notch connected to the positioning slot is also provided on the positioning seat, a cylinder is fixed on the rotating table through a mounting frame, and the piston rod of the cylinder is vertically downward, and the end of the piston rod of the cylinder is connected to a clamping block for clamping a round tube, and a substrate loading mechanism and a round tube loading mechanism are also provided on the base plate.

[0006] In the present invention, the substrate is supplied to the positioning seat by the substrate loading mechanism, the round tube is supplied to the top of the substrate by the round tube loading mechanism, the pressing block is driven downward by the cylinder, the pressing block presses the round tube downward and tightly together with the substrate, the rotating shaft is driven to rotate by the power structure, and the rotating shaft causes the substrate and the round tube to rotate together, thereby realizing the welding of the metal chair legs with the cooperation of the automatic welding robot, without the need for manual loading, and improving the welding efficiency.

[0007] An electromagnetic chuck is also installed in the positioning groove.

[0008] With this structure, the substrate at the positioning seat can be held and fixed by the electromagnetic suction cup.

[0009] The end of the piston rod of the first cylinder is connected to a pressing block via a detachable mounting piece.

[0010] With this structure, the pressing block can be easily disassembled, assembled and replaced through the detachable mounting piece.

[0011] The power structure includes a power motor 1, a sprocket 1, a sprocket 2 and a chain belt. The power motor 1 is installed on a bracket, and the output shaft of the power motor 1 is vertically upward. The sprocket 1 is installed at the end of the output shaft of the power motor 1, and the sprocket 2 is installed at the lower end of the rotating shaft. The chain belt is arranged between the sprocket 1 and the sprocket 2.

[0012] With this structure, the power motor drives the sprocket one to rotate, the sprocket one drives the sprocket two to rotate through the chain belt, and the sprocket two drives the rotating shaft to rotate, so that the rotating shaft can be rotated as needed.

[0013] A position-adjustable plate is also installed on the bracket, and a tensioning wheel matched with the chain belt is installed on the position-adjustable plate.

[0014] With this structure, the chain belt can always be kept in normal use state through the tensioning wheel.

[0015] The substrate loading mechanism includes a feeding box, a vertical plate, a reciprocating arm, an L-shaped linkage rod and a power motor. The feeding box is mounted on the bottom plate through a supporting foot. The upper part of the feeding box is provided with a replenishing port, and the lower part of the feeding box is provided with a material taking port. The vertical plate is mounted on the bottom plate through a supporting foot. The power motor is fixed on the vertical plate, and the output shaft of the power motor is arranged horizontally. The output shaft end of the power motor is simultaneously provided with a driving disk and a driving disk. The middle part of the L-shaped linkage rod is rotatably connected to the vertical plate through a mounting shaft. One end of the L-shaped linkage rod is connected to a driving wheel. 1. The other end of the L-shaped linkage rod is connected to a guide wheel 1, a cam groove 1 is opened on the driving disk 1, and the driving wheel 1 is located in the cam groove 1. A guide rail 1 is vertically installed on the vertical plate 1, and a slider 1 is slidably connected to the guide rail 1, and the slider 1 is connected to a connecting plate 1, and a guide rail 2 is horizontally fixed on the connecting plate, and a slider 2 is slidably connected to the guide rail 2, and the slider 2 is linked to the connecting plate 2, and the connecting plate 2 is connected to a U-shaped limiting piece, and the guide wheel 1 is located in the U-shaped limiting piece, one end of the reciprocating arm is installed on the connecting plate 2, and an electric claw 1 is installed on the other end of the reciprocating arm.

[0016] With this structure, substrates are stacked into a feed box, and a drive disk is driven to rotate by a power motor. A cam groove cooperates with a drive wheel. As the drive disk rotates, an L-shaped linkage rod causes the reciprocating arm to reciprocate back and forth, so that an electric claw can transfer the substrate at the bottom of the feed box to a positioning seat, thereby realizing the loading operation of the substrate. With the cooperation of the cam groove and the drive wheel, the other end of the L-shaped linkage rod can stay briefly at the outer and inner ends to realize grabbing and releasing of materials.

[0017] The middle part of the connecting plate 1 is also connected to the lower end of the regulating rod, and the upper end of the regulating rod is provided with a horizontally arranged limiting groove. The vertical plate 1 is rotatably connected to the middle part of the linkage plate through the mounting shaft 2. One end of the linkage plate is connected to the driving wheel 2, and the other end of the linkage plate is connected to the guide wheel 2. The driving disk 2 is provided with a cam groove 2, the driving wheel 2 is located in the cam groove 2, and the guide wheel 2 is located in the limiting groove. A spring 1 is provided between the connecting plate 1 and the vertical plate 1.

[0018] With this structure, due to the cooperation between the cam groove 2 and the driving wheel 2, after the reciprocating arm retracts inward to the end position, the reciprocating arm can move downward, so that the electric claw 1 places the substrate on the positioning seat, and then the reciprocating arm can reset upward. After completing the upward reset, the reciprocating arm extends outward and continues to clamp the substrate from a place in the feed box; in the process of the reciprocating arm grabbing the substrate from the inside to the outside and then from the outside to the inside, the reciprocating arm is always in a horizontal high position, and only needs to make an up and down movement in the process of placing the substrate into the placement seat.

[0019] The round tube feeding mechanism includes a feeding box 2, a vertical plate 2 and a cylinder 2. The feeding box 2 is mounted on the bottom plate through a supporting foot 3. The upper portion of the feeding box 2 is provided with a replenishing port 2, and the lower portion of the feeding box 2 is provided with a feeding port 2. The feeding port 2 is also connected to a blocking edge, and the blocking edge is also provided with a clearance gap 2. The vertical plate 2 barrel supporting foot 4 is mounted on the bottom plate. A guide rail 3 is horizontally fixed on the vertical plate 2, and a slider 3 is slidably connected to the guide rail 3. The slider 3 is connected to a reciprocating plate, and the reciprocating plate is horizontally rotatably mounted. There is a switching shaft, one end of the switching shaft is connected to the guide wheel, and the other end of the switching shaft is equipped with a guide block, and the guide block is slidably connected to a guide rod, one end of the guide rod is connected to the auxiliary block, and there is a spring two between the auxiliary block and the guide block, and the other end of the guide rod is equipped with an electric claw two. A reversing guide groove that cooperates with the guide wheel is also provided on the second vertical plate, and the reversing guide groove includes a long retaining groove body and a short retaining groove body. The long retaining groove body is located below the short retaining groove body, and the long retaining groove body and the short retaining groove body are connected by an inclined switching groove body.

[0020] With this structure, when the guide wheel is located in the long retaining groove, the guide rod is in a horizontal state; when the guide wheel is located in the short retaining groove, the guide rod is in a vertical state; when the guide wheel is located in the inclined switching groove, the guide rod can be switched between the horizontal state and the vertical state.

[0021] After the round tube at the second feeding box is clamped by the electric claw No. 2, it is first dragged out a distance at one end, and then the round tube is switched from a horizontal state to a vertical state, so that the round tube is directly above the base plate of the positioning seat. Since the guide rod can move downward relative to the guide block, the pressing block acts downward on the round tube, and the round tube can be moved downward and pressed against the base plate. At this time, the electric claw No. 2 can be reset to continue grabbing the round tube.

[0022] The middle portion of the guide rod also has an annular limiting portion.

[0023] The second feeding box is vertically slidably connected to two toggle rods, and the toggle rod is located above the second feeding port, and the toggle rod is provided with a number of toggle teeth, and the second feeding box is also provided with an arc-shaped material guide portion, and a guide seat is installed in the material guide portion, and a pushing knife is horizontally slidably connected to the guide seat, and a mounting frame 2 is also installed on the side of the second feeding box, and a power motor 3 is installed on the second mounting frame, and the output shaft of the power motor 3 is horizontally arranged, and a driving disk 3 is installed at the end of the output shaft of the power motor 3, and the mounting frame 2 is rotatably connected to the middle of the T-type linkage rod, and a guide pin 1 is provided on the first end of the T-type linkage rod. The second end of the rod is provided with a guide pin 2, the third end of the T-shaped linkage rod is rotatably connected to the upper end of the connecting rod, the lower end of the connecting rod is rotatably connected to the driving disk 3, the guide rod 1 is vertically installed on the mounting frame 2, the guide rod 1 is slidably connected to the guide block 1, the guide block 1 is connected to the L-shaped bar, and the L-shaped bar is connected to the middle of the toggle rod through the mounting rod 1, the guide block 1 has a limiting slot block 1 that cooperates with the guide pin 1, and the mounting frame 2 is horizontally installed with a guide rod 2, the guide rod 2 is slidably connected to the guide block 2, the guide block 2 is connected to the pushing knife through the mounting rod 2, and the guide block 2 has a limiting slot block 2 that cooperates with the guide pin 2.

[0024] By adopting this structure, the driving disk three can be driven to rotate by the power motor three, and under the action of the connecting rod, the T-shaped linkage rod can swing back and forth, and the guide pin one cooperates with the limiting slot block one, and the guide pin two cooperates with the limiting slot block two, so that the guide block one can move back and forth vertically. At the same time, the guide block two can move back and forth horizontally. The pushing knife that moves back and forth horizontally pushes the round tubes of the feeding box two to the material blocking edge one by one. At the same time, the toggle rod that moves back and forth vertically can make the round tubes in the feeding box two move, so that the round tubes move downward smoothly, and the feeding of the round tubes is reliable.

[0025] Compared with the existing technology, this metal chair leg automatic welding equipment has the following advantages:

[0026] In the present invention, the substrate is supplied to the positioning seat by the substrate loading mechanism, the round tube is supplied to the top of the substrate by the round tube loading mechanism, the pressing block is driven downward by the cylinder, the pressing block presses the round tube downward and tightly together with the substrate, the rotating shaft is driven to rotate by the power structure, and the rotating shaft causes the substrate and the round tube to rotate together, thereby realizing the welding of the metal chair legs with the cooperation of the automatic welding robot, without the need for manual loading, and improving the welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the planar structure of the substrate loading mechanism in the present invention;

[0028] Figure 2 It is a schematic diagram of the three-dimensional structure of the feed box 1 in the present invention;

[0029] Figure 3 It is a schematic diagram of the three-dimensional structure of the substrate loading mechanism in the present invention;

[0030] Figure 4 It is a schematic diagram of the three-dimensional structure of the substrate loading mechanism of the present invention with the portion removed;

[0031] Figure 5 It is a schematic diagram of the planar structure of the round tube feeding mechanism of the present invention;

[0032] Figure 6 It is a partial structural diagram of the round tube feeding mechanism in the present invention;

[0033] Figure 7 It is a schematic diagram of the three-dimensional structure of the feed box 2 in the present invention;

[0034] Figure 8 It is a schematic planar structural diagram of the round tube feeding mechanism of the present invention with the portion removed;

[0035] Figure 9 This is a schematic diagram of the planar structure of the feed box 2 in the present invention;

[0036] Figure 10 It is a schematic diagram of the planar structure of the dismantled part of the present invention;

[0037] Figure 11 It is a schematic diagram of the three-dimensional structure of the positioning seat in the present invention;

[0038] Figure 12 It is a schematic diagram of the three-dimensional structure of the metal chair leg in the present invention;

[0039] Figure 13 It is a schematic diagram of the three-dimensional structure of the chair of the present invention;

[0040] In the figure, 1, bottom plate; 2, feeding box 1; 2a, feeding port 1; 3, positioning seat; 3a, positioning groove; 3b, clearance notch 1; 4, electric claw 1; 5, reciprocating arm; 6, U-shaped limiter; 7, guide wheel 1; 8, connecting plate 1; 9, spring 1; 10, driving plate 1; 10a, cam groove 1; 11, mounting shaft 1; 12, vertical plate 1; 13, L-shaped linkage rod; 14, driving wheel 1; 15, connecting plate 2; 16, slider 2; 17, slider 1; 18, guide rail 1; 1 9. Drive disc 2; 19a. Cam groove 2; 20. Guide rail 2; 21. Control lever; 21a. Limiting groove; 22. Guide wheel 2; 23. Fixed shaft; 24. Drive wheel 2; 25. Linkage plate; 26. Mounting shaft 2; 27. Vertical plate 2; 27a. Reversing guide groove; 27a1. Long retaining groove; 27a2. Tilt switching groove; 27a3. Short retaining groove; 28. Feed box 2; 28a. Removal port 2; 29. ​​Guide rail 3; 30. Reciprocating plate; 31. Cylinder 2; 3 2. Electric claw 2; 33. Guide rod; 34. Slider 3; 35. Switching shaft; 36. Guide wheel; 37. Stop edge; 37a. Gap 2; 38. Spring 2; 39. Mounting frame 2; 40. Limiting slot 1; 41. Guide rod 1; 42. L-shaped bar; 43. Guide block 1; 44. Guide pin 2; 45. Guide block 2; 46. Drive disc 3; 47. Connecting rod; 48. Guide rod 2; 49. Limiting slot 2; 50. T-type linkage rod; 51. Guide pin 1; 52. Guide seat; 53. Pushing knife; 54. Automatic welding robot; 55. Welding gun; 56. Cylinder 1; 57. Removable mounting part; 58. Pressing block; 59. Turntable; 60. Rotating shaft; 61. Sprocket 2; 62. Power motor 1; 63. Position-adjustable plate; 64. Sprocket 1; 65. Tensioner; 66. Mounting frame 1; 67. Chain belt; 68. Bracket; 69. Electromagnetic suction cup; 70. Guide block; 71. Toggle rod; 71a. Toggle tooth; 72. Mounting rod 1; 73. Mounting rod 2. DETAILED DESCRIPTION

[0041] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0042] like Figures 1-13The present metal chair leg automatic welding equipment includes an automatic welding robot 54 installed on the base plate 1, and the automatic welding robot 54 is provided with a welding gun 55. In this embodiment, the automatic welding robot 54 adopts the existing technology, and the existing product picking robot can also be arranged according to needs. The welded metal chair legs can be removed from the positioning seat 3 by the product picking robot; a bracket 68 is fixed on the base plate 1, and a rotating shaft 60 is vertically rotated on the bracket 68. The lower end of the rotating shaft 60 is connected to a power structure that can drive it to rotate, and the upper end of the rotating shaft 60 is connected to the rotating table 59. The positioning seat 3 is fixed on the rotating table 59, and the positioning seat 3 is provided with a useful The positioning groove 3a of the positioning substrate is provided on the positioning seat 3, and a clearance gap 3b connected to the positioning groove 3a is provided. The clearance gap 3b allows the electric claw 4 to smoothly place the substrate on the positioning seat 3; when welding a product, the rotation angle of the positioning seat 3 is 330-350 degrees, and the automatic welding robot 54 is used to cooperate with the rotating positioning seat 3 to achieve welding of the metal chair legs; a cylinder 56 is fixed on the rotating table 59 through a mounting frame 66, and the piston rod of the cylinder 56 is vertically downward, and the end of the piston rod of the cylinder 56 is connected to a clamping block 58 for clamping the round tube, and a substrate loading mechanism and a round tube loading mechanism are also provided on the bottom plate 1.

[0043] In the present invention, the substrate is supplied to the positioning seat 3 by the substrate loading mechanism, the round tube is supplied to the top of the substrate by the round tube loading mechanism, the pressing block 58 is driven downward by the cylinder 1 56, the pressing block 58 presses the round tube downward and tightly together with the substrate, the sprocket 1 64 is driven to rotate by the power motor 1 62, the sprocket 1 64 drives the sprocket 2 61 to rotate through the chain belt 67, and the sprocket 2 61 drives the rotating shaft 60 to rotate, so that the rotating shaft 60 can be rotated as needed, and the rotating shaft 60 causes the substrate and the round tube to rotate together, so that with the cooperation of the automatic welding robot 54, the welding of the metal chair legs is realized, without the need for manual loading, thereby improving its welding efficiency.

[0044] An electromagnetic suction cup 69 is also installed in the positioning groove 3 a , and the electromagnetic suction cup 69 adopts the existing technology; with this structure, the substrate at the positioning seat 3 can be sucked and fixed by the electromagnetic suction cup 69 .

[0045] The end of the piston rod of the cylinder 1 56 is connected to a pressing block 58 via a detachable mounting member 57 ; with this structure, the pressing block 58 can be easily disassembled, assembled, and replaced via the detachable mounting member 57 .

[0046] The power structure includes a power motor 62, a sprocket 64, a sprocket 61 and a chain belt 67. The power motor 62 is installed on a bracket 68, and the output shaft of the power motor 62 is vertically upward. The sprocket 64 is installed on the end of the output shaft of the power motor 62, the sprocket 61 is installed at the lower end of the rotating shaft 60, and the chain belt 67 is sleeved between the sprocket 64 and the sprocket 61; specifically: a position-adjustable plate 63 is also installed on the bracket 68, and a tensioning wheel 65 that cooperates with the chain belt 67 is installed on the position-adjustable plate 63; with this structure, the chain belt 67 can always be kept in normal use through the tensioning wheel 65.

[0047] The substrate loading mechanism includes a feed box 2, a vertical plate 12, a reciprocating arm 5, an L-shaped linkage rod 13 and a power motor 2. The feed box 2 is installed on the bottom plate 1 through a support leg 1. The upper part of the feed box 2 has a replenishment port 1, and the lower part of the feed box 2 has a material removal port 2a. The substrates are stacked up and down in the feed box 2; the vertical plate 12 is installed on the bottom plate 1 through the support leg 2, and the power motor 2 is fixed on the vertical plate 12, and the output shaft of the power motor 2 is set horizontally. The end of the output shaft of the power motor 2 is also equipped with a drive disk 10 And the driving disk 2 19, in this embodiment, the driving disk 10 and the driving disk 2 19 are fixed on the fixed shaft 23, and the fixed shaft 23 is connected to the output shaft end of the power motor 2; the middle part of the L-shaped linkage rod 13 is rotatably connected to the vertical plate 12 through the installation shaft 11, and one end of the L-shaped linkage rod 13 is connected to the driving wheel 14, and the other end of the L-shaped linkage rod 13 is connected to the guide wheel 7. A cam groove 10a is opened on the driving disk 10, and the driving wheel 14 is located in the cam groove 10a. With this structure, the cam groove 10a and the driving wheel 14 are connected. With the cooperation of the moving wheel 14, the other end of the L-shaped linkage rod 13 can be temporarily stopped at the outer and inner ends to achieve material grabbing and discharging; a guide rail 18 is vertically installed on the vertical plate 12, and a slider 17 is slidably connected to the guide rail 18, and the slider 17 is connected to the connecting plate 8. A guide rail 20 is horizontally fixed on the connecting plate, and a slider 2 16 is slidably connected to the guide rail 20. The slider 2 16 is linked to the connecting plate 2 15, and the connecting plate 2 15 is connected to the U-shaped limiter 6. The guide wheel 17 is located at the U-shaped limiter. 6, one end of the reciprocating arm 5 is installed on the connecting plate 2 15, and the other end of the reciprocating arm 5 is installed with an electric claw 4, which is an existing product. With this structure, the substrates are stacked in the feeding box 2, and the driving disk 10 is driven to rotate by the power motor 2. The cam groove 10a cooperates with the driving wheel 14. As the driving disk rotates, the L-shaped linkage rod 13 can make the reciprocating arm 5 reciprocate back and forth, so that the electric claw 4 can transfer the substrate at the bottom of the feeding box 2 to the positioning seat 3, thereby realizing the loading operation of the substrate.

[0048] The middle part of the connecting plate 8 is also connected to the lower end of the regulating rod 21. The upper end of the regulating rod 21 is provided with a horizontally arranged limiting groove 21a. The vertical plate 12 is rotatably connected to the middle part of the linkage plate 25 through the installation shaft 26. One end of the linkage plate 25 is connected to the driving wheel 24, and the other end of the linkage plate 25 is connected to the guide wheel 22. The driving disk 2 is provided with a cam groove 29a. The driving wheel 24 is located in the cam groove 19a. The guide wheel 22 is located in the limiting groove 21a. A spring 9 is provided between the connecting plate 8 and the vertical plate 12. In this structure, due to the cooperation between the cam groove 2 19a and the driving wheel 2 24, after the reciprocating arm 5 retracts inward to the end position, the reciprocating arm 5 can move downward, so that the electric claw 1 4 places the substrate on the positioning seat 3, and then the reciprocating arm 5 can reset upward. After completing the upward reset, the reciprocating arm 5 extends outward and continues to clamp the substrate from the feed box 1 2; in the process of the reciprocating arm 5 grabbing the substrate from the inside to the outside and then from the outside to the inside, the reciprocating arm 5 is always in a horizontal high position, and only needs to make an up and down movement in the process of placing the substrate into the placement seat.

[0049] The round tube feeding mechanism includes a feeding box 28, a vertical plate 27 and a cylinder 231. The feeding box 28 is mounted on the bottom plate 1 through a supporting foot 3. The upper part of the feeding box 28 has a replenishing port 2, and the lower part of the feeding box 28 has a feeding port 28a. The feeding port 28a is also connected to a stopper edge 37. The stopper edge 37 is also provided with a clearance notch 237a. The clearance notch 237a allows the electric claw 232 to clamp the round tube at the single material edge. The round tube in the feeding box 28 is placed horizontally; the vertical plate 27 and the barrel support foot 4 are installed on the bottom plate 1, and the vertical plate 27 is horizontally fixed with a guide rail 3 29, and the guide rail 3 29 is slidably connected with a slider 34, and the slider 34 is connected to the reciprocating plate 30. The reciprocating plate 30 is horizontally rotatably installed with a switching shaft 35, one end of the switching shaft 35 is connected to the guide wheel 36, and the other end of the switching shaft 35 is installed with a guide block 70, and the guide block A guide rod 33 is slidably connected to 70, one end of the guide rod 33 is connected to the auxiliary block, and a spring 238 is provided between the auxiliary block and the guide block 70. An electric claw 232 is installed at the other end of the guide rod 33, and a reversing guide groove 27a is also provided on the vertical plate 27 to cooperate with the guide wheel 36. The reversing guide groove 27a includes a long retaining groove body 27a1 and a short retaining groove body 27a3. The long retaining groove body 27a1 is located below the short retaining groove body 27a3, and the long retaining groove body 27a1 and the short retaining groove body 27a3 are connected by an inclined switching groove body 27a2; with this structure, when the guide wheel 36 is located in the long retaining groove body 27a1, the guide rod 33 is in a horizontal state; when the guide wheel 36 is located in the short retaining groove body 27a3, the guide rod 33 is in a vertical state; when the guide wheel 36 is located in the inclined switching groove body 27a2, the guide rod 33 can be switched between a horizontal state and a vertical state.

[0050] After the round tube at the feeding box 28 is clamped by the electric claw 2 32, it is first dragged out a distance at one end, and then the round tube is switched from a horizontal state to a vertical state, so that the round tube is located directly above the base plate of the positioning seat 3. Since the guide rod 33 can move downward relative to the guide block 70, the pressing block 58 acts downward on the round tube, so that the round tube can move downward and rest against the base plate. At this time, the electric claw 2 32 can be reset to continue grabbing the round tube.

[0051] The guide rod 33 also has an annular limiting portion in the middle.

[0052] There are two toggle rods 71 ​​connected to the feed box 28 in a vertical sliding manner, and the toggle rod 71 is located above the feed port 28a. The toggle rod 71 has a plurality of toggle teeth 71a. The feed box 28 also has an arc-shaped guide portion, a guide seat 52 is installed in the guide portion, and a push knife 53 is horizontally slidably connected to the guide seat 52. The side of the feed box 28 is also installed with a mounting frame 2 39, and the mounting frame 2 39 is installed with a power motor 3, and the output shaft of the power motor 3 is arranged horizontally. The end of the output shaft of the power motor 3 A driving disk 3 46 is installed, a mounting frame 2 39 is rotatably connected to the middle of a T-shaped linkage rod 50, a guide pin 1 51 is provided on the first end of the T-shaped linkage rod 50, a guide pin 2 44 is provided on the second end of the T-shaped linkage rod 50, a third end of the T-shaped linkage rod 50 is rotatably connected to the upper end of the connecting rod 47, and a lower end of the connecting rod 47 is rotatably connected to the driving disk 3 46, a guide rod 1 limiting slot block 1 40 is vertically installed on the mounting frame 2 39, a guide block 1 43 is slidably connected to the guide rod 1 limiting slot block 1 40, and an L-shaped The L-shaped strip 42 is connected to the middle of the toggle rod 71 through the mounting rod 72, and the guide block 43 has a limiting groove block 40 that cooperates with the guide pin 51. The mounting frame 39 is horizontally mounted with a guide rod 48, and the guide rod 48 is slidably connected with a guide block 45. The guide block 45 is connected to the push knife 53 through the mounting rod 73, and the guide block 45 has a limiting groove block 49 that cooperates with the guide pin 44. With this structure, the driving disc 46 can be driven to rotate by the power motor 3, and the connecting rod 47 is connected to the driving disc 3. Under the action of , the T-shaped linkage rod 50 can be made to swing back and forth, the guide pin 1 51 cooperates with the limiting groove block 1 40, and the guide pin 2 44 cooperates with the limiting groove block 2 49, so that the guide block 1 43 can move back and forth vertically. At the same time, the guide block 2 45 can be moved back and forth horizontally. The pushing knife 53 that moves back and forth horizontally pushes the round tubes of the feeding box 2 28 one by one to the material blocking edge 37. At the same time, the toggle rod 71 that moves back and forth vertically can make the round tubes in the feeding box 2 28 move, so that the round tubes move downward smoothly, and the round tube feeding is reliable.

[0053] Metal chair legs and finished products after installation Figure 12 and Figure 13 shown.

[0054] The above components are all common standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0055] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

Claims

1. An automatic welding device for metal chair legs, comprising an automatic welding robot (54) mounted on a base plate (1), the automatic welding robot (54) having a welding gun (55), characterized in that: A bracket (68) is fixed on the bottom plate (1), a rotating shaft (60) is vertically rotatably arranged on the bracket (68), the lower end of the rotating shaft (60) is connected to a power structure capable of driving the rotating shaft (60), the upper end of the rotating shaft (60) is connected to a rotating platform (59), a positioning seat (3) is fixed on the rotating platform (59), a positioning groove (3a) for positioning the substrate is provided on the positioning seat (3), a clearance notch (3b) connected to the positioning groove (3a) is also provided on the positioning seat (3), a cylinder (56) is fixed on the rotating platform (59) via a mounting frame (66), and the cylinder (56) is The piston rod is vertically downward, and the end of the piston rod of the cylinder 1 (56) is connected to a clamping block (58) for clamping the round tube. The bottom plate (1) is also provided with a substrate loading mechanism and a round tube loading mechanism; the substrate loading mechanism comprises a feed box 1 (2), a vertical plate 1 (12), a reciprocating arm (5), an L-shaped linkage rod (13) and a power motor 2. The feed box 1 (2) is mounted on the bottom plate (1) through a supporting foot 1. The upper part of the feed box 1 (2) has a replenishing port 1, and the lower part of the feed box 1 (2) has a material taking port 1 (2a). The vertical plate 1 (12) is mounted on the bottom plate (1) through a supporting foot 2. The power motor 2 Motor 2 is fixed on vertical plate 1 (12), and the output shaft of power motor 2 is arranged horizontally. The end of the output shaft of power motor 2 is simultaneously installed with drive disk 1 (10) and drive disk 2 (19). The middle part of the L-shaped linkage rod (13) is rotatably connected to vertical plate 1 (12) through mounting shaft 1 (11). One end of the L-shaped linkage rod (13) is connected to drive wheel 1 (14), and the other end of the L-shaped linkage rod (13) is connected to guide wheel 1 (7). A cam groove 1 (10a) is provided on the drive disk 1 (10), and the drive wheel 1 (14) is located in the cam groove 1 (10a). A guide rail (18) is vertically installed, a slider (17) is slidably connected to the guide rail (18), a connecting plate (8) is connected to the slider (17), a guide rail (20) is horizontally fixed on the connecting plate, a slider (16) is slidably connected to the guide rail (20), a connecting plate (15) is connected to the slider (16), a U-shaped limiting member (6) is connected to the connecting plate (15), the guide wheel (7) is located in the U-shaped limiting member (6), one end of the reciprocating arm (5) is installed on the connecting plate (15), and an electric claw (4) is installed on the other end of the reciprocating arm (5).

2. The metal chair leg automatic welding equipment according to claim 1, characterized in that: An electromagnetic suction cup (69) is also installed in the positioning groove (3a).

3. The automatic welding equipment for metal chair legs according to claim 1 is characterized in that: The end of the piston rod of the first cylinder (56) is connected to a pressing block (58) via a detachable mounting member (57).

4. The automatic welding equipment for metal chair legs according to claim 1 is characterized in that: The power structure comprises a power motor 1 (62), a sprocket 1 (64), a sprocket 2 (61) and a chain belt (67); the power motor 1 (62) is mounted on a bracket (68), and the output shaft of the power motor 1 (62) is vertically upward; the sprocket 1 (64) is mounted on the end of the output shaft of the power motor 1 (62); the sprocket 2 (61) is mounted on the lower end of the rotating shaft (60); and the chain belt (67) is sleeved between the sprocket 1 (64) and the sprocket 2 (61).

5. The automatic welding equipment for metal chair legs according to claim 1 is characterized in that: A position-adjustable plate (63) is also mounted on the bracket (68), and a tensioning wheel (65) matching with the chain belt (67) is mounted on the position-adjustable plate (63).

6. The automatic welding equipment for metal chair legs according to claim 1 is characterized in that: The middle part of the connecting plate 1 (8) is also connected to the lower end of the regulating rod (21); the upper end of the regulating rod (21) is provided with a horizontally arranged limiting groove (21a); ​​the vertical plate 1 (12) is rotatably connected to the middle part of the linkage plate (25) through the mounting shaft 2 (26); one end of the linkage plate (25) is connected to the driving wheel 2 (24); the other end of the linkage plate (25) is connected to the guide wheel 2 (22); the driving disk 2 (19) is provided with a cam groove 2 (19a); the driving wheel 2 (24) is located in the cam groove 2 (19a); the guide wheel 2 (22) is located in the limiting groove (21a); ​​and a spring 1 (9) is provided between the connecting plate 1 (8) and the vertical plate 1 (12).

7. The automatic welding equipment for metal chair legs according to claim 1 is characterized in that: The round tube feeding mechanism comprises a feed box 2 (28), a vertical plate 2 (27) and a cylinder 2 (31). The feed box 2 (28) is mounted on the bottom plate (1) via a support leg 3. The upper portion of the feed box 2 (28) has a replenishing port 2. The lower portion of the feed box 2 (28) has a material taking port 2 (28a). The material taking port 2 (28a) is also connected to a material blocking edge (37). The material blocking edge (37) is also provided with a clearance notch 2 (37a). The vertical plate 2 (27) and a support leg 4 are mounted on the bottom plate (1). A guide rail 3 (29) is horizontally fixed on the vertical plate 2 (27). A slider 3 (34) is slidably connected to the guide rail 3 (29). The slider 3 (34) is connected to a reciprocating plate (30). A switching shaft (35) is horizontally rotatably mounted on the reciprocating plate (30). The switching shaft (35) is One end of the switching shaft (35) is connected to the guide wheel (36), and the other end of the switching shaft (35) is installed with a guide block (70), and the guide block (70) is slidably connected with a guide rod (33), and one end of the guide rod (33) is connected to the auxiliary block, and a second spring (38) is provided between the auxiliary block and the guide block (70). The other end of the guide rod (33) is installed with a second electric claw (32), and the second vertical plate (27) is also provided with a reversing guide groove (27a) that matches the guide wheel (36), and the reversing guide groove (27a) includes a long retaining groove body (27a1) and a short retaining groove body (27a3), and the long retaining groove body (27a1) is located below the short retaining groove body (27a3), and the long retaining groove body (27a1) and the short retaining groove body (27a3) are connected via an inclined switching groove body (27a2).

8. The automatic welding equipment for metal chair legs according to claim 7 is characterized in that: The guide rod (33) also has an annular limiting portion in the middle.

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