High-frequency welding equipment for square and rectangular pipes

Abstract

The invention relates to high-frequency welding equipment for square and rectangular pipes, which belongs to the field of welding equipment and comprises a worktable, and a welding mechanism is arranged on the worktable. The welding mechanism comprises a conveying assembly, four welding heads and two welding assemblies, the welding heads are arranged at the top of the workbench, the two welding assemblies are symmetrically arranged at intervals in the front-back direction relative to the welding heads, and the four welding heads are distributed at intervals from left to right; the conveying assembly is used for driving the welding assemblies in the same group to intermittently and circularly move; a cavity is formed in the workbench, two sets of through holes are formed in the top of the workbench, the two sets of through holes correspond to the two sets of welding assemblies in a one-to-one mode, each set of through holes comprises two through holes, and the two through holes in the same set are distributed in the top of the workbench in a left-right spaced mode. And the feeding action and the discharging action can be carried out at the same time, so that the welding efficiency is improved.

Description

Technical Field

[0001] The invention relates to high-frequency welding equipment for square and rectangular tubes, belonging to the field of welding equipment. Background Art

[0002] The square tube is formed by rolling the steel strip into a circular steel tube with a cross section. The gaps of the steel tube are then welded to form a steel tube with a sealed interface. The circular steel tube is then rolled into a rectangular steel tube with a cross section. Since the steel strip is long and for reasons such as storage and transportation, the square tube is often cut into the same length after the steel strip is rolled into a square tube, so as to facilitate subsequent transportation and storage. Since the square tubes are of the same size, they are often not long enough in actual use. In this case, two square tubes need to be welded and lengthened.

[0003] The Chinese invention patent with publication number CN117381222A discloses a square tube welding device, which belongs to the field of welding devices. It includes two clamping rings, and the center lines of the two clamping rings are arranged to overlap. The inner wall of each clamping ring is provided with a clamping plate. The multiple clamping plates connected to each clamping ring can drive the clamped square tube to the center position of the clamping ring for clamping. A welding head is also provided in the middle position of the upper side of the two clamping rings. This application has the effect of facilitating the alignment welding operation of two square tubes. However, in the prior art, only one pair of square tubes can be welded at a time, and the work efficiency is low.

[0004] Therefore, there is a need for a square tube high frequency welding device to improve the square tube welding efficiency. Summary of the invention

[0005] The technical problem to be solved by the present invention is: in order to overcome the deficiencies of the prior art, a square tube high frequency welding device is provided to improve the square tube welding efficiency.

[0006] The technical solution adopted by the present invention to solve the above-mentioned problem is: a high-frequency welding device for square and rectangular tubes, comprising a workbench, on which a welding mechanism is arranged; The welding mechanism comprises a conveying assembly, a welding head and two groups of welding assemblies, wherein the welding head is arranged on the top of the workbench, and the two groups of welding assemblies are spaced and symmetrically arranged with respect to the welding head. There are four welding heads, and the four welding heads are spaced from left to right. The conveying assembly is used to drive each welding assembly in the same group to move intermittently and cyclically. The workbench is provided with a cavity, and the top of the workbench is provided with two groups of through holes, the two groups of through holes correspond to the two groups of welding assemblies one by one, and each group of through holes is provided with two through holes, and the two through holes in the same group are distributed on the top of the workbench at intervals on the left and right, and each through hole is connected to the cavity of the workbench, and among the multiple welding assemblies in the same group, some welding assemblies are located above the workbench, and the remaining welding assemblies are located in the cavity of the workbench; The welding assembly located above the workbench and the welding assembly located in the cavity both move in the left-right direction. The welding assembly located in the cavity moves in the opposite direction to the welding assembly located above the workbench. The number of welding assemblies located above the workbench is five. The five welding assemblies and four welding heads located above the workbench are staggered; The welding assembly located in the cavity and the welding assembly located above the workbench pass through two through holes of the same group in sequence during the cyclic movement; The welding assembly includes a clamping frame, a first bearing and a rotating shaft, the clamping frame is in a circular shape, the rotating shaft is located on a side of the clamping frame away from the welding head, the axis of the rotating shaft coincides with the center line of the clamping frame in the front-to-back direction, one end of the rotating shaft close to the clamping frame is coaxially fixedly connected with a rotating disk, the other end of the rotating shaft is installed with a friction wheel, the rotating disk is connected to the clamping frame, the rotating shaft is installed on the inner side of the first bearing, the outer side of the first bearing is fixedly connected with a moving seat, and the moving seat is connected to the conveying assembly; Two groups of friction blocks are arranged on the top of the workbench, the two groups of friction blocks correspond to the two groups of welding assemblies one by one, each group of friction blocks has four friction blocks, the four friction blocks correspond to the four welding heads one by one, and the friction blocks are located on the right side of the welding heads.

[0007] Preferably, the welding head is a high-frequency welding head.

[0008] Preferably, the clamping frame includes a frame body and a frame cover, the top of the frame body is open, the frame cover is arranged on the top of the frame body, one side of the frame cover is rotatably connected to the frame body, and the other side of the frame cover is locked with the frame body by a buckle.

[0009] Preferably, the rotating disk and the clamping frame are detachably fixedly connected via two connecting rods, and the connecting rods are parallel to the front-rear direction.

[0010] Preferably, both ends of the connecting rod are fixed to the clamping frame and the rotating disk respectively by two fixing screws, and the connecting rod is connected to the frame.

[0011] Preferably, a positioning plate is provided between the clamping frame and the rotating disk, the positioning plate is movably sleeved on two connecting rods, and the connecting rods and the positioning plate are locked by locking screws.

[0012] Preferably, chamfers are provided on both left and right sides of the top of the friction block.

[0013] Preferably, a brake pad is fixedly connected to the movable seat, and the brake pad is in contact with the outer peripheral wall of the rotating shaft.

[0014] Preferably, the conveying assembly includes two conveyor belts, two groups of rotating wheels and two transmission shafts. The two conveyor belts and the two groups of rotating wheels correspond one-to-one to the two welding assemblies. Each group of rotating wheels is provided with two. The two rotating wheels in the same group are connected by a conveyor belt. The two rotating wheels in the same group are distributed on the left and right. The conveyor belt passes through the two through holes in the same group in sequence. The two transmission shafts are distributed on the left and right. The two rotating wheels on the left are respectively installed at the two ends of the left transmission shaft, and the two rotating wheels on the right are respectively installed at the two ends of the right transmission shaft. The transmission shaft is connected to the workbench through a second bearing, and a driving source is connected to one of the transmission shafts.

[0015] Preferably, the friction block is provided with anti-slip grooves.

[0016] Compared with the prior art, the advantages of the present invention are: The invention discloses a square tube high frequency welding device, which realizes the continuous welding of the square tube, reduces the total welding time, and can perform the loading and unloading actions at the same time, thereby improving the welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of a high-frequency welding device for square and rectangular tubes of the present invention; Figure 2 This is a front view of a high-frequency welding device for square and rectangular tubes according to the present invention; Figure 3 It is a left view of a high frequency welding device for square and rectangular tubes of the present invention; Figure 4 A top view of a high-frequency welding device for square and rectangular tubes according to the present invention; Figure 5 It is a schematic diagram of the connection structure between the welding assembly and the square tube; Figure 6 It is a structural schematic diagram of a welding assembly; Figure 7 It is a structural schematic diagram of the clamping frame; Figure 8 It is a structural schematic diagram of the friction block; Fig. 9 It is a schematic diagram of the structure of the conveying component.

[0018] in: Workbench 1, welding mechanism 2, through hole 3, square tube 4; Conveying assembly 21, welding head 22, welding assembly 23, friction block 24; Conveyor belt 211, rotating wheel 212, transmission shaft 213, second bearing 214, driving source 215; Clamping frame 230, first bearing 231, rotating shaft 232, rotating disk 233, friction wheel 234, moving seat 235, connecting rod 236, fixing screw 237, positioning plate 238, locking screw 239, brake pad 240; Frame body 2301 , frame cover 2302 , and buckle 2303 . DETAILED DESCRIPTION

[0019] like Figure 1-9 As shown, a square tube high frequency welding device in this embodiment includes a workbench 1, and a welding mechanism 2 is arranged on the workbench 1; The welding mechanism 2 includes a conveying assembly 21, a welding head 22 and two groups of welding assemblies 23. The welding head 22 is arranged on the top of the workbench 1. The two groups of welding assemblies 23 are spaced apart and symmetrically arranged with respect to the welding head 22. The welding head 22 is a high-frequency welding head. There are four welding heads 22. The four welding heads 22 are spaced apart from left to right. The conveying assembly 21 is used to drive each welding assembly 23 of the same group to move intermittently and cyclically. The workbench 1 is provided with a cavity, and the top of the workbench 1 is provided with two groups of through holes 3, the two groups of through holes 3 correspond to the two groups of welding assemblies 23 one by one, and each group of through holes 3 is provided with two, and the two through holes 3 in the same group are distributed on the top of the workbench 1 at intervals, and each through hole 3 is connected to the cavity of the workbench 1, and among the multiple welding assemblies 23 in the same group, some welding assemblies 23 are located above the workbench 1, and the remaining welding assemblies 23 are located in the cavity of the workbench 1; The welding assembly 23 located above the workbench 1 and the welding assembly 23 located in the cavity both move in the left-right direction, and the welding assembly 23 located in the cavity moves in the opposite direction to the welding assembly 23 located above the workbench 1. The number of welding assemblies 23 located above the workbench 1 is five; The five welding assemblies 23 and the four welding heads 22 located above the workbench 1 are arranged alternately; The welding assembly 23 in the cavity and the welding assembly 23 above the workbench 1 sequentially pass through the two through holes 3 in the same group during the cyclic movement; The welding assembly 23 includes a clamping frame 230, a first bearing 231 and a rotating shaft 232. The clamping frame 230 is in a circular shape. The rotating shaft 232 is located on a side of the clamping frame 230 away from the welding head 22. The axis of the rotating shaft 232 coincides with the center line of the clamping frame 230 in the front-to-back direction. One end of the rotating shaft 232 close to the clamping frame 230 is coaxially fixedly connected with a rotating disk 233. The other end of the rotating shaft 232 is installed with a friction wheel 234. The rotating disk 233 is connected to the clamping frame 230. The rotating shaft 232 is installed on the inner side of the first bearing 231. The outer side of the first bearing 231 is fixedly connected with a moving seat 235. The moving seat 235 is connected to the conveying assembly 21. Two groups of friction blocks 24 are arranged on the top of the workbench 1. The two groups of friction blocks 24 correspond to the two groups of welding assemblies 23 one by one. Each group of friction blocks 24 has four friction blocks. The four friction blocks 24 correspond to the four welding heads 22 one by one. The friction blocks 24 are located on the right side of the welding heads 22. During welding, the two clamping frames 230 that are opposite to each other in the front and rear positions are a pair, the loading area is located at the pair of clamping frames 230 on the leftmost side above the workbench 1, and the unloading area is the pair of clamping frames 230 on the rightmost side above the workbench 1; When loading, two square tubes 4 are respectively inserted into two clamping frames 230 in the loading area, and the ends of the two square tubes 4 are made to abut against each other. In fact, the clamping frames 230 match the square tubes 4, and the square tubes 4 are clamped by the clamping frames 230. Then, a welding is performed, and the movable seat 235 is moved to the right by the conveying assembly 21. The movement of the movable seat 235 causes the clamping frame 230 to drive the square tube 4 to move synchronously. When the square tube 4 moves to the welding head 22, at this time, the position where the two square tubes 4 are abutted backwards is just opposite to the welding head 22. As the square tube 4 continues to move to the right, a welding is performed on the bottom of the connection between the two square tubes 4. When the friction wheel 234 moves to the friction block 24, the welding head 22 stops welding the two square tubes 4 through calculation. Through the friction force between the friction wheel 234 and the friction block 24, the movable seat 235 causes the friction wheel 234 to drive the rotating shaft 232 to rotate on the first bearing 231 during the movement. The rotation of the rotating shaft 232 drives the rotating disk 233 to rotate synchronously. The rotation of the rotating disk 233 drives the clamping frame 230 to rotate. When the friction wheel 234 is separated from the friction block 24, it is calculated that the rotation angle of the clamping frame 230 is 90 degrees at this time. The second, third and fourth welding are completed in sequence in the manner of one welding, so as to realize the welding of the four sides of the connection of the two square tubes 4, that is, the welding action of the two square tubes 4 is completed; When unloading, the square tube 4 after welding is removed from the clamping block, and the welding assembly 23 enters the cavity from the right through hole 3, while the welding assembly 23 in the cavity moves from the left through hole 3 to the top of the workbench 1, and the cycle continues; When two square tubes 4 are welded once and rotated 90 degrees, each welding assembly 23 stops moving for a set time to provide time for loading the next group of square tubes 4; In this way, the continuous welding of the square tube 4 is achieved, the total welding time is reduced, and the loading and unloading actions can be performed simultaneously, thereby improving the welding efficiency; The clamping frame 230 includes a frame body 2301 and a frame cover 2302. The top of the frame body 2301 is open, and the frame cover 2302 is arranged on the top of the frame body 2301. One side of the frame cover 2302 is rotatably connected to the frame body 2301, and the other side of the frame cover 2302 is locked with the frame body 2301 by a buckle 2303. During the feeding of the square tube 4, the buckle 2303 is opened and the frame cover 2302 is turned over. After the square tube 4 is placed into the frame body 2301 from the opening, the frame cover 2302 is closed, and the frame cover 2302 is locked with the frame body 2301 by the buckle 2303, and the square tube 4 is clamped and fixed by the frame cover 2302 and the frame body 2301; The rotating disk 233 and the clamping frame 230 are detachably fixedly connected by two connecting rods 236. The connecting rods 236 are parallel to the front-back direction. The two ends of the connecting rods 236 are respectively fixed to the clamping frame 230 and the rotating disk 233 by two fixing screws 237. The connecting rods 236 are connected to the frame 2301. When it is necessary to adapt to square tubes 4 of different lengths, the connecting rods 236 of different lengths can be replaced. Of course, when the diameter of the square tube 4 changes, the clamping frame 230 of the corresponding size can be replaced. A positioning plate 238 is provided between the clamping frame 230 and the rotating disk 233. The positioning plate 238 is movably sleeved on two connecting rods 236. The connecting rod 236 and the positioning plate 238 are locked by a locking screw 239. After loosening the locking screw 239, the distance between the positioning plate 238 and the clamping frame 230 is adjusted. After tightening the locking screw 239, the positioning plate 238 and the connecting rod 236 are locked. During the feeding process, one end of the square tube 4 abuts against the positioning plate 238, and the other end of the square tube 4 is the welding end. By adjusting the position of the positioning plate 238, that is, adjusting the position of the welding end after the two square tubes 4 abut, it is ensured that the welding head 22 is aligned with the welding end when performing the welding action; The left and right sides of the top of the friction block 24 are both provided with chamfers; The movable seat 235 is fixedly connected with a brake pad 240, and the brake pad 240 is in contact with the outer peripheral wall of the rotating shaft 232. During the movement of the rotating shaft 232, when the friction wheel 234 contacts the friction block 24, through calculation, the friction force between the friction wheel 234 and the friction block 24 is greater than the friction force between the brake pad 240 and the rotating shaft 232, and the friction wheel 234 is in a rotating state. When the friction wheel 234 is separated from the friction block 24, the rotating shaft 232 is stopped by the friction force between the brake pad 240 and the rotating shaft 232, thereby improving the rotation angle accuracy of the square tube 4; The friction block 24 is provided with anti-skid patterns, which improve the friction between the friction wheel 234 and the friction block 24 to ensure the normal rotation of the friction wheel 234; The conveying assembly 21 includes two conveyor belts 211, two groups of rotating wheels 212 and two transmission shafts 213. The two conveyor belts 211 and the two groups of rotating wheels 212 correspond to the two welding assemblies 23 one by one. Each group of rotating wheels 212 is provided with two. The two rotating wheels 212 in the same group are connected by the conveyor belt 211. The two rotating wheels 212 in the same group are distributed on the left and right. The conveyor belt 211 passes through the two through holes 3 in the same group in sequence. The two transmission shafts 213 are distributed on the left and right. The two rotating wheels 212 on the left are respectively installed at both ends of the left transmission shaft 213. The two rotating wheels 212 on the right are respectively installed at the two ends of the right transmission shaft 213, and the transmission shaft 213 is connected to the workbench 1 through the second bearing 214. A driving source 215 is connected to one of the transmission shafts 213, wherein the driving source 215 can be a motor, and the moving seat 235 is fixedly arranged on the conveyor belt 211. During welding, the driving source 215 drives the transmission shaft 213 to rotate intermittently, so that the rotating wheel 212 drives the conveyor belt 211 to move intermittently, and the movement of the conveyor belt 211 drives the moving seat 235 to move synchronously; In addition to the above embodiments, the present invention also includes other implementation modes. Any technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.

Claims

1. A high-frequency welding device for square tubes, comprising a workbench (1), characterized in that: The workbench (1) is provided with a welding mechanism (2); The welding mechanism (2) comprises a conveying assembly (21), a welding head (22) and two groups of welding assemblies (23), wherein the welding head (22) is arranged on the top of the workbench (1), and the two groups of welding assemblies (23) are spaced apart and arranged symmetrically with respect to the welding head (22) in front and behind, and the number of the welding heads (22) is four, and the four welding heads (22) are spaced apart from left to right, and the conveying assembly (21) is used to drive each welding assembly (23) in the same group to move intermittently and cyclically; The workbench (1) is provided with a cavity, and the top of the workbench (1) is provided with two groups of through holes (3), the two groups of through holes (3) corresponding to the two groups of welding assemblies (23) one by one, each group of through holes (3) is provided with two, the two through holes (3) in the same group are spaced apart and distributed on the top of the workbench (1), each through hole (3) is connected to the cavity of the workbench (1), and among the multiple welding assemblies (23) in the same group, some of the welding assemblies (23) are located above the workbench (1), and the remaining welding assemblies (23) are located in the cavity of the workbench (1); The welding assembly (23) located above the workbench (1) and the welding assembly (23) located in the cavity both move in the left-right direction, the welding assembly (23) located in the cavity moves in the opposite direction to the welding assembly (23) located above the workbench (1), and the number of welding assemblies (23) located above the workbench (1) is five; Five welding assemblies (23) and four welding heads (22) located above the workbench (1) are arranged in a staggered manner; The welding assembly (23) located in the cavity and the welding assembly (23) located above the workbench (1) sequentially pass through two through holes (3) in the same group during cyclic movement; The welding assembly (23) comprises a clamping frame (230), a first bearing (231) and a rotating shaft (232); the clamping frame (230) is circular-shaped; the rotating shaft (232) is located on a side of the clamping frame (230) away from the welding head (22); the axis of the rotating shaft (232) coincides with the center line of the clamping frame (230) in the front-rear direction; one end of the rotating shaft (232) close to the clamping frame (230) is coaxially fixedly connected to a rotating disk (233); the other end of the rotating shaft (232) is installed with a friction wheel (234); the rotating disk (233) is connected to the clamping frame (230); the rotating shaft (232) is installed on the inner side of the first bearing (231); the outer side of the first bearing (231) is fixedly connected to a moving seat (235); the moving seat (235) is connected to the conveying assembly (21); Two groups of friction blocks (24) are arranged on the top of the workbench (1), the two groups of friction blocks (24) correspond one-to-one to the two groups of welding assemblies (23), each group of friction blocks (24) is provided with four, the four friction blocks (24) correspond one-to-one to the four welding heads (22), and the friction blocks (24) are located on the right side of the welding heads (22).

2. A square tube high frequency welding device according to claim 1, characterized in that: The welding head (22) is a high-frequency welding head.

3. The high frequency welding equipment for square and rectangular tubes according to claim 1 is characterized in that: The clamping frame (230) comprises a frame body (2301) and a frame cover (2302); the top of the frame body (2301) is open; the frame cover (2302) is arranged on the top of the frame body (2301); one side of the frame cover (2302) is rotatably connected to the frame body (2301); and the other side of the frame cover (2302) is locked with the frame body (2301) via a buckle (2303).

4. A square tube high frequency welding device according to claim 3, characterized in that: The rotating disk (233) and the clamping frame (230) are detachably fixedly connected via two connecting rods (236), and the connecting rods (236) are parallel to the front-rear direction.

5. The high frequency welding equipment for square and rectangular tubes according to claim 4 is characterized in that: The two ends of the connecting rod (236) are fixed to the clamping frame (230) and the rotating disk (233) respectively via two fixing screws (237), and the connecting rod (236) is connected to the frame (2301).

6. A square tube high frequency welding device according to claim 5, characterized in that: A positioning plate (238) is provided between the clamping frame (230) and the rotating disk (233); the positioning plate (238) is movably sleeved on two connecting rods (236); the connecting rods (236) and the positioning plate (238) are locked by means of locking screws (239).

7. The high frequency welding equipment for square and rectangular tubes according to claim 1, characterized in that: Chamfers are provided on both left and right sides of the top of the friction block (24).

8. The high frequency welding equipment for square and rectangular tubes according to claim 1, characterized in that: A brake pad (240) is fixedly connected to the movable seat (235), and the brake pad (240) is in contact with the outer peripheral wall of the rotating shaft (232).

9. The high frequency welding equipment for square and rectangular tubes according to claim 1, characterized in that: The conveying assembly (21) comprises two conveyor belts (211), two groups of rotating wheels (212) and two transmission shafts (213). The two conveyor belts (211) and the two groups of rotating wheels (212) correspond to the two welding assemblies (23) one by one. Each group of rotating wheels (212) is provided with two. The two rotating wheels (212) in the same group are connected by the conveyor belt (211). The two rotating wheels (212) in the same group are distributed on the left and right. The conveyor belt (211) passes through the two through holes (3) in the same group in sequence. The two transmission shafts (213) are distributed on the left and right. The two rotating wheels (212) on the left are respectively mounted on the two ends of the left transmission shaft (213). The two rotating wheels (212) on the right are respectively mounted on the two ends of the right transmission shaft (213). The transmission shaft (213) is connected to the workbench (1) via a second bearing (214). A driving source (215) is connected to one of the transmission shafts (213).

10. The high frequency welding equipment for square and rectangular tubes according to claim 1, characterized in that: The friction block (24) is provided with anti-slip grooves.

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