Metal chair frame welding machine

Abstract

The invention belongs to the technical field of welding machining machinery, and particularly relates to a metal chair frame welding machine which comprises an adjusting assembly, the adjusting assembly comprises a fifth circular plate fixedly connected to the lower end of a first circular plate through an arc-shaped plate, a sixth circular plate is arranged at the lower end of the fifth circular plate in a transmission mode, and a rectangular frame is fixedly connected to one side of the lower end of the sixth circular plate. A rectangular sliding block is fixedly connected to the middle of the upper end of the first bottom plate and slidably arranged in the rectangular frame, a supporting plate is rotatably arranged at the lower end of the first bottom plate through a second bottom plate, a clamping assembly is slidably arranged at the upper end of the first circular plate, and the clamping assembly comprises a rotating plate arranged at the position corresponding to the upper end of the rectangular sliding block. Clamping blocks are arranged on the periphery of the lower end of the rotating plate in a sliding mode, a welding head is arranged at the upper end of the first circular plate in a sliding mode, the welding head is connected with a welding machine through a wire harness, and the problem that when a plurality of chair legs are welded, errors may occur, and the quality is unqualified is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of welding processing machinery, in particular to a metal chair frame welding machine. Background Art

[0002] In the prior art, in order to ensure the strength of the chair, the chair frame generally adopts a metal frame welding structure, and then uses artificial boards or plant veneers to press into back panels and seat cushion panels and then install them on the chair frame. During the assembly process of the chair frame, in order to ensure the stability of the connection effect of each metal frame, each metal frame needs to be welded by a welding tool.

[0003] A patent application with publication number CN212398662U discloses a chair frame welding and fixing tool, wherein limit blocks are symmetrically installed on the upper surface of the base plate, and a processing workpiece is adaptively engaged in the limit blocks. The processing workpiece is installed on the support frame and fastened by a fastening mechanism. By adding a fastening mechanism and cooperating with the limit blocks, the problem of inaccurate manual positioning generated during welding of the processing workpiece can be effectively solved, thereby improving the welding accuracy and assembly efficiency of the chair frame.

[0004] In the above-mentioned prior art, when welding the metal chair frame, since multiple chair legs need to be welded to the lower end of the circular plate, when welding the chair legs, when welding each chair leg, it is necessary to weld all four sides of the single chair leg to ensure the firmness of the welding. Generally, it is necessary to splice the chair legs with the panel and then weld the chair legs with a handheld welding gun. When welding multiple chair legs, errors may occur in the welding process, which may easily lead to problems with unqualified quality of the finished product.

[0005] To this end, the present invention provides a metal chair frame welding machine. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve its technical problems is: a metal chair frame welding machine described in the present invention comprises a first circular plate, an adjusting assembly is provided at the lower end of the first circular plate, the adjusting assembly comprises a fifth circular plate fixedly connected to the lower end of the first circular plate through an arc plate, a sixth circular plate is arranged on the lower end of the fifth circular plate for transmission, a rectangular frame is fixedly connected to one side of the lower end of the sixth circular plate, a first bottom plate is arranged on the lower end of the sixth circular plate, a rectangular slider is fixedly connected to the middle part of the upper end of the first bottom plate, the rectangular slider is slidably arranged to slide inside the rectangular frame, a second bottom plate is rotatably arranged at the lower end of the first bottom plate, a supporting plate is fixedly connected to the lower end of the second bottom plate, a clamping assembly is slidably arranged on the upper end of the first circular plate, the clamping assembly comprises a rotating plate provided at a position corresponding to the upper end of the rectangular slider, clamping blocks are slidably arranged around the lower end of the rotating plate, a welding head is slidably arranged on the upper end of the first circular plate, and the welding head is connected to the welding machine through a wiring harness.

[0008] Preferably, waist-shaped holes are respectively opened at four corners of the first circular plate, and first cylindrical blocks are slidably arranged in the waist-shaped holes.

[0009] Preferably, a second circular plate is rotatably arranged at the middle part of the lower end of the first circular plate, and arc-shaped holes are respectively opened at positions of the second circular plate corresponding to the waist-shaped holes, and the first cylindrical block is slidably arranged in the arc-shaped holes, and a third circular plate is rotatably arranged at the lower end of the second circular plate, and the third circular plate is arranged on the upper end of the fifth circular plate through the third cylindrical block, and rectangular grooves are respectively opened at positions of the upper end of the third circular plate corresponding to the first cylindrical block, and the lower end of the first cylindrical block is slidably arranged in the rectangular groove.

[0010] Preferably, the upper ends of the first cylindrical blocks are respectively fixed with arc blocks, the middle part of the third circular plate is slidably penetrated by a third cylindrical block, the third cylindrical block is rotatably arranged at the lower end of the second circular plate, the lower end of the third cylindrical block is fixed with a fourth circular plate, the edge of the fourth circular plate is fixed with a first telescopic rod, the first telescopic rod is fixed to the fifth circular plate, and the output end of the first telescopic rod is fixed to the third circular plate.

[0011] Preferably, a second cylindrical block is slidably arranged inside the lower end of the first cylindrical block, the second cylindrical block is fixedly connected to the inside of the first cylindrical block through a spring, the second cylindrical block is slidably arranged in the arc hole, and the second cylindrical block can slide in the rectangular groove.

[0012] Preferably, a rectangular bar is fixedly connected to one side of the rectangular slider, and the rectangular bar slides through one side of the rectangular frame, a second telescopic rod is fixedly connected to the upper end of the rectangular bar on a side away from the rectangular slider, a third telescopic rod is fixedly connected to one end of the second telescopic rod away from the rectangular bar, and a rotating plate is rotatably provided at the lower end of the third telescopic rod on a side away from the second telescopic rod.

[0013] Preferably, a screw rod is rotatably arranged in the middle of the rectangular sliding block.

[0014] Preferably, a fourth telescopic rod is fixedly connected to the upper end of the welding head, a fifth telescopic rod is fixedly connected to the end of the fourth telescopic rod away from the welding head, a sixth telescopic rod is fixedly connected to the lower end of the fifth telescopic rod away from the fourth telescopic rod, a base is rotatably provided at the lower end of the sixth telescopic rod, and the base is fixedly connected to the upper end of the support plate.

[0015] Preferably, a seventh circular plate is slidably provided on the upper end of the first circular plate, an eighth circular plate is rotatably provided on the lower end of the seventh circular plate, seventh telescopic rods are slidably provided on the four corners of the lower end of the eighth circular plate, waist-shaped blocks are fixedly connected to the lower ends of the seventh telescopic rods, and a fourth cylindrical block is fixedly connected to the lower end of the waist-shaped block away from the seventh telescopic rod.

[0016] Preferably, a rectangular plate is fixedly connected to the upper end of the seventh circular plate, telescopic plates are respectively fixedly connected to the lower ends of both sides of the rectangular plate, slide rails are respectively fixedly connected to the positions of the upper ends of the support plates corresponding to the telescopic plates, and the telescopic plates are respectively slidably arranged on the upper ends of the slide rails.

[0017] The beneficial effects of the present invention are as follows: 1. The metal chair frame welding machine described in the present invention clamps the chair legs by driving the clamping blocks, and then splices the chair legs with the circular plates, and then drives the first bottom plate to rotate, driving the chair legs to rotate as the center, so as to weld the chair legs all around, and drives the circular plate on the upper end of the first circular plate to rotate by driving the fifth circular plate, so as to weld a plurality of chair legs in turn, and ensure that the center position of each chair leg and the circular plate is the same, and the welding head remains stationary during welding to ensure the quality of the weld. Movement of the welding head may cause uneven welds, pores, slag inclusions and other defects, thereby affecting the welding quality. This solves the problem that when welding a plurality of chair legs, errors may occur in the welding process and the quality of the finished product may be unqualified.

[0018] 2. The metal chair frame welding machine described in the present invention places a ring on the outside of each fourth cylindrical block, and then drives the seventh telescopic rod to drive the fourth cylindrical block to slide on the lower end of the eighth circular plate through the waist-shaped block, so that the fourth cylindrical block is against the inner side of the ring, and the ring is fixed on the outside of the fourth cylindrical block, and then drives the seventh circular plate to move the middle of the upper end of each chair leg, so that the ring is located in the middle of each chair leg, and then drives the seventh telescopic rod to extend, driving the ring to be located in the middle of each chair leg, so that the chair leg is tightly against the outside of the ring, and then drives the welding head to move to the joint of the ring and the chair leg, and then drives the eighth circular plate and the fifth circular plate to rotate synchronously, weld the ring to the middle of each chair leg, and fix the chair leg again to ensure the firmness of the metal frame of the chair. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Figure 1is a three-dimensional diagram of the first embodiment of the present invention; Figure 2 It is a schematic diagram of the explosion of the lower end of the first circular plate; Figure 3 is a schematic diagram of the structure of the regulating component; Figure 4 is a schematic diagram of the clamping assembly structure; Figure 5 It is a schematic diagram of the welding head position; Figure 6 This is a schematic diagram of the position of the seventh circular plate; Figure 7 is a schematic diagram of the position of the fourth cylindrical block; In the figure: 1, first circular plate; 11, waist-shaped hole; 12, first cylindrical block; 121, arc block; 122, second cylindrical block; 123, spring; 13, second circular plate; 131, arc hole; 14, third circular plate; 141, rectangular groove; 15, third cylindrical block; 151, fourth circular plate; 152, first telescopic rod; 16, fifth circular plate; 161, arc plate; 162, sixth circular plate; 163, rectangular frame; 17, first bottom plate; 171, rectangular slider; 17 11. Screw rod; 172. Second bottom plate; 18. Rectangular bar; 181. Second telescopic rod; 182. Third telescopic rod; 183. Rotating plate; 184. Clamping block; 2. Welding head; 21. Fourth telescopic rod; 22. Fifth telescopic rod; 23. Sixth telescopic rod; 24. Base; 3. Seventh circular plate; 31. Eighth circular plate; 32. Seventh telescopic rod; 33. Waist-shaped block; 34. Fourth cylindrical block; 35. Rectangular plate; 36. Telescopic plate; 37. Slide rail; 4. Support plate. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0022] Embodiment 1: Figure 1-Figure 4As shown, a metal chair frame welding machine described in an embodiment of the present invention includes a first circular plate 1, an adjusting assembly is provided at the lower end of the first circular plate 1, the adjusting assembly includes a fifth circular plate 16 fixedly connected to the lower end of the first circular plate 1 through an arc plate 161, a sixth circular plate 162 is provided at the lower end of the fifth circular plate 16 for transmission, a rectangular frame 163 is fixedly connected to one side of the lower end of the sixth circular plate 162, a first bottom plate 17 is provided at the lower end of the sixth circular plate 162, a rectangular slider 171 is fixedly connected to the middle part of the upper end of the first bottom plate 17, the rectangular slider 171 is slidably arranged inside the rectangular frame 163, a second bottom plate 172 is rotatably provided at the lower end of the first bottom plate 17, a supporting plate 4 is fixedly connected to the lower end of the second bottom plate 172, a clamping assembly is slidably provided at the upper end of the first circular plate 1, the clamping assembly includes a rotating plate 183 provided at a position corresponding to the upper end of the rectangular slider 171, clamping blocks 184 are slidably provided around the lower end of the rotating plate 183, a welding head 2 is slidably provided at the upper end of the first circular plate 1, and the welding head 2 is connected to the welding machine through a wiring harness.

[0023] Specifically, when welding a circular metal chair frame, it is necessary to weld a plurality of chair legs to the lower end of a circular plate. When welding each chair leg, it is generally necessary to splice the chair leg with the panel and then weld the chair leg with a handheld welding gun. When welding a plurality of chair legs, errors may occur in the welding process, and the quality of the finished product may be unqualified. When using the present welding machine, the circular plate is placed on the upper end of the first circular plate 1, and then the sixth circular plate 162 is driven to drive the rectangular frame 163 to slide outside the rectangular slider 171, and the rectangular slider 171 is adjusted to the position where the circular plate needs to be welded to the chair leg, and then the chair leg is placed in the middle of each clamping block 184, and each clamping block 184 is driven to slide at the lower end of the rotating plate 183 to clamp the chair leg, and then the rotating plate 183 is driven to drive the chair leg to move to the position corresponding to the upper end of the rectangular slider 171, and then the rotating plate 183 is driven to splice the chair leg with the circular plate, and then the welding head 2 is driven to move to the splicing position of the chair leg and the circular plate, and the welding head 2 remains stationary, and then the first bottom plate 17 is driven to rotate, driving the chair leg as the The center rotates, and the chair legs can be welded around. After welding one chair leg, the clamping block 184 is driven to move away from the chair leg, and the fifth circular plate 16 is driven to rotate to drive the first circular plate 1 to rotate, and rotate to the next welding point of the circular plate, and then the clamping block 184 is driven to clamp the new chair leg again, and then the above welding steps are repeated for multiple welding until all the chair legs are welded. The chair legs are clamped by driving the clamping block 184, and then the chair legs and the circular plate are spliced, and then the first bottom plate 17 is driven to rotate, and the rotation around the chair legs can be carried out to weld the chair legs around. The circular plate at the upper end of the first circular plate 1 is driven by the fifth circular plate 16 to rotate, and multiple chair legs are welded in turn, and it is ensured that the center position of each chair leg and the circular plate is the same, and the welding head 2 remains stationary during welding to ensure the quality of the weld. The movement of the welding head 2 may cause uneven welds, pores, slag inclusions and other defects, thereby affecting the welding quality. This solves the problem that when welding multiple chair legs, errors may occur in the welding process and the quality of the finished product may be unqualified.

[0024] like Figure 2 As shown, waist-shaped holes 11 are respectively opened at four corners of the first circular plate 1, and first cylindrical blocks 12 are respectively slidably arranged in the waist-shaped holes 11.

[0025] Specifically, the circular plate is placed on the upper end of the first circular plate 1 and then the first cylindrical block 12 is driven to slide in the waist-shaped hole 11 until each first cylindrical block 12 clamps the circular plate to fix the circular plate to prevent the first circular plate 1 from moving during welding to cause errors.

[0026] like Figure 2As shown, a second circular plate 13 is rotatably arranged at the middle part of the lower end of the first circular plate 1, and arc holes 131 are respectively opened at the positions of the second circular plate 13 corresponding to the waist-shaped holes 11, and the first cylindrical block 12 is slidably arranged in the arc holes 131, and a third circular plate 14 is rotatably arranged at the lower end of the second circular plate 13, and the third circular plate 14 is arranged at the upper end of the fifth circular plate 16 through the third cylindrical block 15, and rectangular grooves 141 are respectively opened at the upper end of the third circular plate 14 corresponding to the positions of the first cylindrical block 12, and the lower end of the first cylindrical block 12 is slidably arranged in the rectangular groove 141.

[0027] Specifically, when fixing the circular plate, the second circular plate 13 is driven to rotate, driving several first cylindrical blocks 12 to slide in the rectangular groove 141 at the same time, and the first cylindrical block 12 slides in the arc hole 131 at the same time, so that each first cylindrical block 12 slides in the waist-shaped hole 11 at the same time, and the circular plate is fixed so that the circular plate is located in the middle of the first circular plate 1.

[0028] like Figure 2 As shown, the upper end of the first cylindrical block 12 is fixedly connected with an arc block 121, the middle part of the third circular plate 14 is slidably penetrated by a third cylindrical block 15, the third cylindrical block 15 is rotatably arranged at the lower end of the second circular plate 13, the lower end of the third cylindrical block 15 is fixedly connected with a fourth circular plate 151, the edge of the fourth circular plate 151 is fixedly connected with a first telescopic rod 152, the first telescopic rod 152 is fixedly connected to the fifth circular plate 16, and the output end of the first telescopic rod 152 is fixedly connected to the third circular plate 14.

[0029] Specifically, after driving each first cylindrical block 12 to fix the circular plate, the first telescopic rod 152 is driven to contract, driving the third circular plate 14 to slide downward on the outside of the third cylindrical block 15, the third circular plate 14 drives the first cylindrical block 12 to slide downward, and the first cylindrical block 12 drives the arc block 121 to slide downward, so that the arc block 121 is pressed on the upper edge of the circular plate, so that the circular plate is fixed more firmly.

[0030] like Figure 2 As shown, a second cylindrical block 122 is slidably arranged inside the lower end of the first cylindrical block 12. The second cylindrical block 122 is fixedly connected to the inside of the first cylindrical block 12 through a spring 123. The second cylindrical block 122 is slidably arranged in the arc hole 131. The second cylindrical block 122 can slide in the rectangular groove 141.

[0031] Specifically, the third circular plate 14 is driven to drive the second cylindrical block 122 to slide downward, the second cylindrical block 122 drives the first cylindrical block 12 to slide downward through the spring 123, the first cylindrical block 12 drives the arc block 121 to slide downward, and the second cylindrical block 122 stretches the spring 123 when sliding downward to prevent the arc block 121 from excessively squeezing the circular plate.

[0032] like Figure 3-Figure 4As shown, a rectangular bar 18 is fixedly connected to one side of the rectangular slider 171, and the rectangular bar 18 slides through one side of the rectangular frame 163. A second telescopic rod 181 is fixedly connected to the upper end of the rectangular bar 18 away from the rectangular slider 171, and a third telescopic rod 182 is fixedly connected to the end of the second telescopic rod 181 away from the rectangular bar 18. A rotating plate 183 is rotatably provided at the lower end of the third telescopic rod 182 away from the second telescopic rod 181.

[0033] Specifically, when welding chair frames of different sizes, the rectangular slider 171 is driven to slide in the rectangular frame 163, and the position of the rectangular slider 171 on the circular plate is adjusted. The rectangular slider 171 drives the second telescopic rod 181 to move through the rectangular bar 18, and the second telescopic rod 181 drives the rotating plate 183 to move through the third telescopic rod 182, so that the rotating plate 183 is always located directly above the rectangular slider 171, so that chair frames of different sizes can be welded.

[0034] like Figure 4 As shown, a screw rod 1711 is rotatably arranged in the middle of the rectangular sliding block 171 .

[0035] Specifically, the rectangular slider 171 is driven to slide in the rectangular frame 163. After the position is adjusted, the screw rod 1711 is driven to rotate so that the rectangular slider 171 is fixed to the rectangular frame 163. The fixing method is simple and firm.

[0036] like Figure 5 As shown, a fourth telescopic rod 21 is fixedly connected to the upper end of the welding head 2, a fifth telescopic rod 22 is fixedly connected to the end of the fourth telescopic rod 21 away from the welding head 2, a sixth telescopic rod 23 is fixedly connected to the lower end of the fifth telescopic rod 22 away from the fourth telescopic rod 21, and a base 24 is rotatably provided at the lower end of the sixth telescopic rod 23, and the base 24 is fixedly connected to the upper end of the support plate 4.

[0037] Specifically, when welding chair frames of different sizes, it is necessary to adjust the position of the welding head 2 according to the position of the chair legs. The height of the welding head 2 is adjusted by driving the sixth telescopic rod 23 to contract, and the welding head 2 is adjusted close to the chair legs by driving the fifth telescopic rod 22 to contract. After the adjustment is completed, welding can be performed.

[0038] Embodiment 2: Figure 6-Figure 7 As shown, compared with Example 1, another implementation of the present invention is: a seventh circular plate 3 is slidably provided on the upper end of the first circular plate 1, an eighth circular plate 31 is rotatably provided on the lower end of the seventh circular plate 3, and a seventh telescopic rod 32 is slidably provided at the four corners of the lower end of the eighth circular plate 31, and a waist-shaped block 33 is fixedly connected to the lower end of the seventh telescopic rod 32, and a fourth cylindrical block 34 is fixedly connected to the lower end of the waist-shaped block 33 away from the lower end of the seventh telescopic rod 32.

[0039] Specifically, after the chair legs are welded, in order to ensure the firmness of the chair frame, the chair legs need to be welded and fixed again, and the ring is placed on the outside of each fourth cylindrical block 34, and then the seventh telescopic rod 32 is driven to drive the fourth cylindrical block 34 to slide on the lower end of the eighth circular plate 31 through the waist-shaped block 33, so that the fourth cylindrical block 34 is against the inner side of the ring, and the ring is fixed on the outside of the fourth cylindrical block 34, and then the seventh circular plate 3 is driven to move the middle of the upper end of each chair leg so that the ring is located in the middle of each chair leg, and then the seventh telescopic rod 32 is driven to extend, driving the ring to be located in the middle of each chair leg, so that the chair leg is close to the outside of the ring, and then the welding head 2 is driven to move to the joint of the ring and the chair leg, and then the eighth circular plate 31 is driven to rotate synchronously with the fifth circular plate 16, and each chair leg outside the ring is welded to ensure the firmness of the metal frame of the chair.

[0040] like Figure 6 As shown, a rectangular plate 35 is fixedly connected to the upper end of the seventh circular plate 3, telescopic plates 36 are fixedly connected to the lower ends of both sides of the rectangular plate 35, and slide rails 37 are fixedly connected to the positions of the telescopic plates 36 at the upper ends of the support plate 4, and the telescopic plates 36 are slidably arranged on the upper ends of the slide rails 37.

[0041] Specifically, after the circular ring is fixed on the outside of the fourth cylindrical block 34, the telescopic plate 36 is then driven to slide on the slide rail 37, and the seventh circular plate 3 is driven to move to the middle of the upper end of each chair leg through the rectangular plate 35. The telescopic plate 36 is driven to extend and retract to adjust the height of the circular ring, and then the seventh telescopic rod 32 is driven to extend, driving the circular ring to be located in the middle of each chair leg, and then welding is performed.

[0042] Working principle: place the circular plate on the upper end of the first circular plate 1, drive the second circular plate 13 to rotate, drive several first cylindrical blocks 12 to slide in the rectangular groove 141 at the same time, and the first cylindrical block 12 slides in the arc hole 131, so that each first cylindrical block 12 slides in the waist-shaped hole 11 at the same time to fix the circular plate, drive the first telescopic rod 152 to contract, drive the third circular plate 14 to slide downward outside the third cylindrical block 15, drive the third circular plate 14 to drive the second cylindrical block 122 to slide downward, the second cylindrical block 122 drives the first cylindrical block 12 to slide downward through the spring 123, the first cylindrical block 12 drives the arc block 121 to slide downward, and the second cylindrical block 122 slides downward. The spring 123 is stretched when the second cylindrical block 122 slides downward to prevent the arc block 121 from excessively squeezing the circular plate, so that the circular plate is fixed more firmly; Then, the sixth circular plate 162 is driven to drive the rectangular frame 163 to slide outside the rectangular slider 171, and the rectangular slider 171 is adjusted to the position where the circular plate needs to be welded to the chair legs. Then, the chair legs are placed in the middle of each clamping block 184, and each clamping block 184 is driven to slide at the lower end of the rotating plate 183 to clamp the chair legs. Then, the rotating plate 183 is driven to drive the chair legs to move to the position corresponding to the upper end of the rectangular slider 171, and then the rotating plate 183 is driven to drive the chair legs to be spliced ​​with the circular plate. Then, the welding head 2 is driven to move to the splicing of the chair legs and the circular plate, and the welding head 2 remains stationary. Then, the first bottom plate 17 is driven to rotate, driving the chair legs to rotate as the center, and then the chair legs can be welded. The chair legs are welded all around. After welding one chair leg, the clamping block 184 is driven to move away from the chair leg, and the fifth circular plate 16 is driven to rotate to drive the first circular plate 1 to rotate to the next welding point of the circular plate. Then, the clamping block 184 is driven to clamp the new chair leg again. Then, the above welding steps are repeated for multiple welding until all the chair legs are welded. The chair legs are clamped by driving the clamping block 184, and then the chair legs and the circular plate are spliced. Then, the first bottom plate 17 is driven to rotate to drive the chair leg as the center, and the chair legs can be welded all around. The circular plate at the upper end of the first circular plate 1 is driven to rotate by driving the fifth circular plate 16, and multiple chair legs are welded in sequence. Place the ring on the outside of each fourth cylindrical block 34, then drive the seventh telescopic rod 32 to drive the fourth cylindrical block 34 to slide on the lower end of the eighth circular plate 31 through the waist-shaped block 33, so that the fourth cylindrical block 34 is against the inner side of the ring, and the ring is fixed on the outside of the fourth cylindrical block 34, then drive the telescopic plate 36 to slide on the slide rail 37, and drive the seventh circular plate 3 to move to the middle of the upper end of each chair leg through the rectangular plate 35, drive the telescopic plate 36 to retract to adjust the height of the ring, then drive the seventh telescopic rod 32 to extend, drive the ring to be located in the middle of each chair leg, and then weld it.

[0043] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A metal chair frame welding machine, comprising a first circular plate (1), wherein an adjustment assembly is provided at the lower end of the first circular plate (1), characterized in that: The adjustment assembly comprises a fifth circular plate (16) fixedly connected to the lower end of the first circular plate (1) via an arc-shaped plate (161); a sixth circular plate (162) is arranged at the lower end of the fifth circular plate (16); a rectangular frame (163) is fixedly connected to one side of the lower end of the sixth circular plate (162); a first bottom plate (17) is arranged at the lower end of the sixth circular plate (162); a rectangular sliding block (171) is fixedly connected to the middle of the upper end of the first bottom plate (17); the rectangular sliding block (171) is slidably arranged inside the rectangular frame (163); and the first bottom plate (17) is arranged to slide inside the rectangular frame (163). A second bottom plate (172) is rotatably provided at the lower end of a bottom plate (17), a support plate (4) is fixedly connected to the lower end of the second bottom plate (172), a clamping assembly is slidably provided at the upper end of the first circular plate (1), the clamping assembly comprises a rotating plate (183) provided at a position corresponding to the upper end of the rectangular slider (171), clamping blocks (184) are slidably provided around the lower end of the rotating plate (183), a welding head (2) is slidably provided at the upper end of the first circular plate (1), and the welding head (2) is connected to a welding machine via a wiring harness.

2. A metal chair frame welding machine according to claim 1, characterized in that: The first circular plate (1) is provided with waist-shaped holes (11) at four corners, respectively, and first cylindrical blocks (12) are slidably arranged in the waist-shaped holes (11).

3. A metal chair frame welding machine according to claim 2, characterized in that: A second circular plate (13) is rotatably arranged at the middle of the lower end of the first circular plate (1), and arc-shaped holes (131) are respectively opened at positions of the second circular plate (13) corresponding to the waist-shaped holes (11), and the first cylindrical block (12) is slidably arranged in the arc-shaped holes (131). A third circular plate (14) is rotatably arranged at the lower end of the second circular plate (13), and the third circular plate (14) is arranged on the upper end of the fifth circular plate (16) through a third cylindrical block (15). Rectangular grooves (141) are respectively opened at positions of the upper end of the third circular plate (14) corresponding to the positions of the first cylindrical block (12), and the lower end of the first cylindrical block (12) is slidably arranged in the rectangular groove (141).

4. A metal chair frame welding machine according to claim 3, characterized in that: The upper ends of the first cylindrical blocks (12) are respectively fixedly connected with arc blocks (121); a third cylindrical block (15) is slidably penetrated through the middle of the third circular plate (14); the third cylindrical block (15) is rotatably arranged on the lower end of the second circular plate (13); a fourth circular plate (151) is fixedly connected to the lower end of the third cylindrical block (15); a first telescopic rod (152) is fixedly connected to the edge of the fourth circular plate (151); the first telescopic rod (152) is fixedly connected to the fifth circular plate (16); and an output end of the first telescopic rod (152) is fixedly connected to the third circular plate (14).

5. A metal chair frame welding machine according to claim 4, characterized in that: A second cylindrical block (122) is slidably disposed inside the lower end of the first cylindrical block (12); the second cylindrical block (122) is fixedly connected to the inside of the first cylindrical block (12) via a spring (123); the second cylindrical block (122) is slidably disposed in the arc-shaped hole (131); and the second cylindrical block (122) is capable of sliding in the rectangular groove (141).

6. A metal chair frame welding machine according to claim 5, characterized in that: A rectangular bar (18) is fixedly connected to one side of the rectangular slider (171), the rectangular bar (18) slides through one side of the rectangular frame (163), a second telescopic rod (181) is fixedly connected to the upper end of the rectangular bar (18) on the side away from the rectangular slider (171), a third telescopic rod (182) is fixedly connected to the end of the second telescopic rod (181) away from the rectangular bar (18), and a rotating plate (183) is rotatably provided on the lower end of the third telescopic rod (182) on the side away from the second telescopic rod (181).

7. A metal chair frame welding machine according to claim 6, characterized in that: A screw rod (1711) is rotatably arranged in the middle of the rectangular sliding block (171).

8. The metal chair frame welding machine according to claim 1, characterized in that: A fourth telescopic rod (21) is fixedly connected to the upper end of the welding head (2); a fifth telescopic rod (22) is fixedly connected to one end of the fourth telescopic rod (21) away from the welding head (2); a sixth telescopic rod (23) is fixedly connected to the lower end of the fifth telescopic rod (22) away from the fourth telescopic rod (21); a base (24) is rotatably provided at the lower end of the sixth telescopic rod (23); and the base (24) is fixedly connected to the upper end of the support plate (4).

9. A metal chair frame welding machine according to claim 1, characterized in that: A seventh circular plate (3) is slidably arranged on the upper end of the first circular plate (1), an eighth circular plate (31) is rotatably arranged on the lower end of the seventh circular plate (3), seventh telescopic rods (32) are slidably arranged at four corners of the lower end of the eighth circular plate (31), waist-shaped blocks (33) are fixedly connected to the lower ends of the seventh telescopic rods (32), and a fourth cylindrical block (34) is fixedly connected to the lower end of the waist-shaped block (33) on a side away from the seventh telescopic rod (32).

10. A metal chair frame welding machine according to claim 9, characterized in that: A rectangular plate (35) is fixedly connected to the upper end of the seventh circular plate (3), telescopic plates (36) are respectively fixedly connected to the lower ends of both sides of the rectangular plate (35), and slide rails (37) are respectively fixedly connected to the upper ends of the support plates (4) at positions corresponding to the telescopic plates (36), and the telescopic plates (36) are respectively slidably arranged on the upper ends of the slide rails (37).

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