A welding device for metal bellows

Abstract

The present invention belongs to the technical field of metal bellows welding processing, and in particular, is a welding device for metal bellows. In view of the problem that the current fixing structure of metal bellows welding is complex and the fixing efficiency is low, the following scheme is proposed, including a fixed top frame, two vertically arranged support legs are fixed at both ends of the fixed top frame, and two parallel slider grooves are provided at the bottom of the fixed top frame. The pipe clamping motor of the present invention drives two pipe clamping screws to rotate, and separates the pipe clamping arc frames on both sides into an open state. The operator places two metal bellows at the two end positions respectively, controls the driving of the pipe clamping motor, closes the pipe clamping arc frames on both sides, and adjusts the position of the clamping ring blocks at the top and bottom, contacts the outer wall of the metal bellows through the pipe clamping wheel, and clamps the metal bellows stably. The metal bellows at the two end positions are controlled to approach each other by the moving screw at the top to meet the welding requirements.

Description

Technical Field

[0001] The invention relates to the technical field of metal bellows welding processing, in particular to a welding device for metal bellows. Background Art

[0002] Metal bellows is a kind of pipe with regular wave-like appearance. Commonly used metal bellows are carbon steel, stainless steel, steel lined with plastic, aluminum, etc. They are mainly used for non-concentric axial transmission with a very small bending radius, or irregular turning, expansion and contraction, or absorbing thermal deformation of pipes, or for connecting pipes to pipes or pipes to equipment in situations where it is not convenient to install with fixed elbows.

[0003] The existing welding equipment for processing metal bellows has the following problems: In the current metal bellows welding process, two bellows are fixed, then brought close to the middle position, and welded after fitting. However, the current fixing method uses three-point clamping to fix the ends of the metal bellows. This fixing method has a complicated fixing process and leads to low fixing efficiency. Moreover, for longer metal bellows, this fixing method cannot guarantee the stability of the welding position. The existing technology is not easy to solve such problems. Therefore, there is an urgent need for welding equipment for metal bellows to solve the above problems. Summary of the invention

[0004] Based on the technical problem that the current metal bellows welding has a complex fixing structure and low fixing efficiency, the present invention proposes a welding device for metal bellows.

[0005] The lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of

[0006] Preferably, the limiting rod is located in a slider slot corresponding to the first slider, and the first slider and the limiting rod are slidably plug-connected and installed.

[0007] Preferably, the movable screw rod is located in a slide groove corresponding to the second slide block, and a threaded hole is provided in the middle of the second slide block, and the movable screw rod and the second slide block are threadedly sleeved and installed.

[0008] Preferably, a tube clamping motor is fixed to the middle of the bottom of the movable top frame by bolts, and tube clamping screws are fixed to the rotating shafts on both sides of the tube clamping motor. A threaded rod seat slot is provided on the top of the tube clamping arc frame, and a threaded rod seat is fixed inside the threaded rod seat slot by a bearing, and the threaded rod seat and the tube clamping screw are installed by threaded sleeve connection.

[0009] Preferably, a welding main frame is installed in the middle position of the fixed top frame through a bearing, an electric push rod is installed at the bottom of the welding main frame, and a welding lifting frame is fixed to the bottom of the electric push rod, a welding swing arm is fixed to the bottom of the welding lifting frame through a bearing, a welding gun is installed on one side of the welding swing arm, and a servo is installed inside the welding main frame and the welding swing arm, and the servo output shaft is fixed to the rotating shaft.

[0010] Preferably, a tightening box is hinged at the bottom of the welding swing arm, and sliding grooves are provided at both ends of the tightening box, and a tightening rod is slidably clamped inside the sliding groove, and tightening clamping plates are installed at the ends of the tightening rods at both ends.

[0011] Preferably, a tightening rod tooth plate is installed in the middle of the tightening rod, a tightening drive gear is installed in the middle of the tightening box, and a motor is installed on the rotating shaft of the tightening drive gear, and the tightening drive gear is meshed with the tightening rod tooth plate.

[0012] Preferably, a tube clamping swing frame is installed on the top of the clamping ring block through a bearing, and tube clamping wheels are installed at both ends of the tube clamping swing frame, the outer wall of the tube clamping wheel is made of soft rubber material, and a first limit spring is installed between the two ends of the tube clamping swing frame and the clamping ring block, a driving groove is opened inside the clamping ring block, and a clamping ring block driving gear is installed inside the driving groove, a motor is installed on the rotating shaft of the clamping ring block driving gear, an arc-shaped tooth plate is fixed to the inner wall of the tube clamping ring groove, and the clamping ring block driving gear is meshed with the arc-shaped tooth plate.

[0013] Preferably, a through hole is provided in the middle of the second sliding block, and a threaded sleeve is installed in the through hole via a bearing, a threaded hole is provided in the middle of the threaded sleeve, and the movable screw rod and the threaded sleeve are sleeved and installed via the threaded hole.

[0014] Preferably, a block slot is provided inside the second sliding block, and a vertically sliding threaded sleeve block is installed inside the block slot, the bottom material of the threaded sleeve block is nickel-iron alloy, a second limit spring is fixed between the bottom of the threaded sleeve block and the bottom of the block slot, and an electromagnet is fixed at the middle position of the bottom of the block slot located at the middle of the second limit spring, a slot hole is provided in the middle of the bottom of the threaded sleeve, and the threaded sleeve block and the slot hole are snap-connected.

[0015] The beneficial effects of the present invention are:

[0016] 1. The welding equipment for metal bellows, the tube clamping motor drives two tube clamping screws to rotate, and separates the tube clamping arc frames on both sides into an open state. The operator places two metal bellows at the two end positions respectively, controls the drive of the tube clamping motor, closes the tube clamping arc frames on both sides, and adjusts the positions of the clamping ring blocks at the top and bottom. The tube clamping wheel contacts the outer wall of the metal bellows and clamps the metal bellows stably. The metal bellows at the two end positions are controlled by the moving screw at the top to approach each other to meet the welding requirements.

[0017] 2. The welding equipment for metal bellows is arranged in an adjustable state between the movable lead screw and the second slider. Thus, when welding a longer metal bellows, the electromagnet is controlled to separate the threaded sleeve block at the top from the bottom of the threaded sleeve, and the threaded sleeve is rotatable inside the second slider. Therefore, the position of the movable top frame can be moved, and the two pipe clamping mechanisms at the same end are moved away from each other, so that a longer metal bellows can be clamped. Alternatively, the distance can be adjusted to be closer, which is suitable for welding shorter metal bellows. After the position is adjusted, the electromagnet is powered off, and the threaded sleeve block is lifted up by the second limit spring and clamped with the threaded sleeve at the top, so that the corresponding position of the movable top frame is fixed, and the control and adjustment can only be performed by the movable lead screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of a welding device for a metal bellows proposed by the present invention;

[0019] Figure 2 A schematic diagram of the position of one end of the overall structure of a welding device for a metal bellows proposed by the present invention;

[0020] Figure 3 A schematic diagram of the structure of a pipe clamping mechanism of a welding device for a metal bellows proposed by the present invention;

[0021] Figure 4 A schematic diagram of the structure of a threaded rod seat of a welding device for a metal bellows proposed by the present invention;

[0022] Figure 5A schematic diagram of the structure of a clamping ring block of a welding device for a metal bellows proposed by the present invention;

[0023] Figure 6 A schematic diagram of the welding mechanism structure of a welding device for a metal bellows proposed by the present invention;

[0024] Figure 7 A schematic cross-sectional view of a tightening box of a welding device for a metal bellows proposed by the present invention;

[0025] Figure 8 A schematic diagram of the structure of a movable threaded sleeve of a welding device for a metal bellows proposed by the present invention;

[0026] Fig. 9 A welding device for metal bellows proposed by the present invention Figure 8 Schematic diagram of the enlarged structure of part A in FIG.

[0027] In the figure: 1, support leg; 2, end plate; 3, fixed top frame; 4, welding main frame; 5, pipe clamping mechanism; 6, pipe clamping arc frame; 7, clamping ring block; 8, pipe clamping screw rod; 9, pipe clamping motor; 10, moving screw rod; 11, limit rod; 12, moving top frame; 13, pipe clamping ring groove; 14, pipe clamping wheel; 15, pipe clamping swing frame; 16, slider groove; 17, threaded rod seat slot; 18, threaded rod seat; 19, clamping Ring block driving gear; 20, first limit spring; 21, first slider; 22, second slider; 23, welding lifting frame; 24, tightening rod tooth plate; 25, tightening clamping plate; 26, tightening rod; 27, tightening box; 28, welding swing arm; 29, welding gun; 30, tightening driving gear; 31, threaded sleeve; 32, clamping block slide; 33, electromagnet; 34, threaded sleeve clamping block; 35, second limit spring. DETAILED DESCRIPTION

[0028] Example 1, reference Figure 1-7, a welding device for a metal corrugated pipe comprises a fixed top frame 3, two vertically arranged supporting legs 1 are fixed at both ends of the fixed top frame 3, two parallel slider grooves 16 are provided at the bottom of the fixed top frame 3, and end plates 2 are fixed at both ends of the fixed top frame 3, a movable top frame 12 is installed at the bottom of the fixed top frame 3, a first slider 21 and a second slider 22 are fixed at the top of the movable top frame 12, the first slider 21 and the second slider 22 are respectively slidably engaged with the two slider grooves 16, one of the end plates 2 is installed with a movable screw rod 10 and a limit rod 11, the movable screw rod 10 and the limit rod 11 are respectively located inside the two slider grooves 16, a pipe clamping mechanism 5 is installed at the bottom of the movable top frame 12, the pipe clamping mechanism 5 comprises a pipe clamping arc frame 6 installed at the bottom of the movable top frame 12 through a bearing, a pipe clamping ring groove 13 is provided on the inner side of the pipe clamping arc frame 6, and two clamping ring blocks 7 are slidably engaged inside the pipe clamping ring groove 13.

[0029] Furthermore, the limiting rod 11 is located in the slider slot 16 corresponding to the first slider 21 , and the first slider 21 and the limiting rod 11 are slidably plugged and installed.

[0030] Furthermore, the movable screw rod 10 is located in the slider slot 16 corresponding to the second slider 22 , and a threaded hole is opened in the middle of the second slider 22 , and the movable screw rod 10 and the second slider 22 are threadedly sleeved and installed.

[0031] Furthermore, a pipe clamping motor 9 is fixed to the middle of the bottom of the movable top frame 12 by bolts, and pipe clamping screws 8 are fixed to the rotating shafts on both sides of the pipe clamping motor 9. A penetrating threaded rod seat slot 17 is opened on the top of the pipe clamping arc frame 6, and a threaded rod seat 18 is fixed inside the threaded rod seat slot 17 by a bearing. The threaded rod seat 18 and the pipe clamping screw 8 are threadedly sleeved and installed; the pipe clamping screw 8 is driven forward and reversely by the pipe clamping motor 9, so that the pipe clamping arc frames 6 at both sides can move closer to and away from each other. When fixing the metal corrugated pipe before welding, it is directly clamped by the pipe clamping arc frame 6, which is convenient and quick.

[0032] Furthermore, a welding main frame 4 is installed in the middle position of the fixed top frame 3 through a bearing, an electric push rod is installed at the bottom of the welding main frame 4, and a welding lifting frame 23 is fixed to the bottom of the electric push rod, a welding swing arm 28 is fixed to the bottom of the welding lifting frame 23 through a bearing, a welding gun 29 is installed on one side of the welding swing arm 28, and a servo is installed inside the welding main frame 4 and the welding swing arm 28, and the servo output shaft is fixed to the rotating shaft.

[0033] Furthermore, a tightening box 27 is hinged at the bottom of the welding swing arm 28, and sliding grooves are provided at both ends of the tightening box 27, and a tightening rod 26 is slidably clamped inside the sliding groove, and tightening clamping plates 25 are installed at the ends of the tightening rod 26 at both ends.

[0034] Furthermore, a tightening rod tooth plate 24 is installed in the middle position of the tightening rod 26, a tightening drive gear 30 is installed in the middle of the tightening box 27, and a motor is installed on the rotating shaft of the tightening drive gear 30, and the tightening drive gear 30 is meshed with the tightening rod tooth plate 24; in the welding process of the metal bellows, the tightening clamping plates 25 at the two end positions are adjusted to be respectively engaged with the corrugations of the metal bellows at the two end positions, and the tightening drive gear 30 is driven by the motor to make the tightening rods 26 at the two end positions close to the middle, so that the two metal bellows have a pulling force toward the middle during welding, thereby ensuring the welding standard of the weld.

[0035] Furthermore, a tube clamping swing frame 15 is installed on the top of the clamping ring block 7 through a bearing, and tube clamping wheels 14 are installed at both ends of the tube clamping swing frame 15. The outer wall of the tube clamping wheel 14 is made of soft rubber material, and a first limit spring 20 is installed between the two ends of the tube clamping swing frame 15 and the clamping ring block 7. A driving groove is opened inside the clamping ring block 7, and a clamping ring block driving gear 19 is installed inside the driving groove. A motor is installed on the rotating shaft of the clamping ring block driving gear 19. An arc-shaped tooth plate is fixed to the inner wall of the tube clamping ring groove 13, and the clamping ring block driving gear 19 is meshed with the arc-shaped tooth plate.

[0036] When the present invention is used, the whole device is fixed and stabilized, and two sections of metal bellows to be welded are clamped and fixed by two clamping mechanisms 5 at both ends. When the metal bellows are clamped and fixed, the clamping motor 9 drives the two clamping screws 8 to rotate, and the clamping arc frames 6 on both sides are separated into an open state. The operator places the two metal bellows at the two end positions respectively, controls the driving of the clamping motor 9, closes the clamping arc frames 6 on both sides, and adjusts the position of the clamping ring blocks 7 at the top and bottom, contacts the outer wall of the metal bellows through the clamping wheel 14, and clamps the metal bellows stably, and clamps the metal bellows through the top The movable screw rod 10 at the bottom controls the metal bellows at the two end positions to approach each other to meet the welding requirements; during the welding process, the steering gear and the electric push rod work to adjust the position of the welding swing arm 28 at the bottom, and align the welding gun 29 with the welding position for welding. During the welding process, the tightening box 27 at the bottom is controlled by the installed steering gear to control the angle so that the tightening card plate 25 at the two end positions is stuck with the gap of the metal bellows, and the tightening drive gear 30 is driven by the motor to rotate, and the metal bellows at the two end positions that need to be welded are tightened to the middle position to ensure that the welds at the welding positions are neat and standardized.

[0037] Example 2, reference Figure 1-9 , a welding device for a metal bellows, compared with embodiment 1, this embodiment further includes:

[0038] Furthermore, a through hole is opened in the middle of the second sliding block 22, and a threaded sleeve 31 is installed in the through hole through a bearing, a threaded hole is opened in the middle of the threaded sleeve 31, and the movable screw rod 10 and the threaded sleeve 31 are installed through the threaded hole.

[0039] Furthermore, a block slot 32 is provided inside the second sliding block 22, and a vertically sliding threaded sleeve block 34 is installed inside the block slot 32. The bottom material of the threaded sleeve block 34 is nickel-iron alloy. A second limit spring 35 is fixed between the bottom of the threaded sleeve block 34 and the bottom of the block slot 32, and an electromagnet 33 is fixed at the middle position of the second limit spring 35 at the bottom of the block slot 32. A slot hole is provided in the middle of the bottom of the threaded sleeve 31, and the threaded sleeve block 34 is snap-connected with the slot hole.

[0040] When the present invention is used: the movable screw rod 10 and the second slider 22 are in an adjustable state, so that when welding a longer metal bellows, the electromagnet 33 is controlled to separate the top threaded sleeve block 34 from the bottom of the threaded sleeve 31, and the threaded sleeve 31 is in a rotatable state inside the second slider 22, so the position of the movable top frame 12 can be moved, and the two pipe clamping mechanisms 5 at the same end are moved away from each other, so that a longer metal bellows can be clamped, or the distance can be adjusted to be closer, which is suitable for welding shorter metal bellows. After the position is adjusted, the electromagnet 33 is powered off, and the threaded sleeve block 34 is lifted up by the second limit spring 35 and clamped with the top threaded sleeve 31, so that the corresponding position of the movable top frame 12 is fixed, and it can only be controlled and adjusted by the movable screw rod 10.

[0041] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A welding device for a metal bellows, comprising a fixed top frame (3), two vertically arranged support legs (1) are fixed at both ends of the fixed top frame (3), two parallel slider grooves (16) are provided at the bottom of the fixed top frame (3), and end plates (2) are fixed at both ends of the fixed top frame (3), characterized in that: A movable top frame (12) is installed at the bottom of the fixed top frame (3), and a first slider (21) and a second slider (22) are fixed at the top of the movable top frame (12), respectively. The first slider (21) and the second slider (22) are respectively slidably engaged with two slider slide grooves (16), and one of the end plates (2) is installed with a movable screw rod (10) and a limit rod (11), and the movable screw rod (10) and the limit rod (11) are respectively located inside the two slider slide grooves (16). A pipe clamping mechanism (5) is installed at the bottom of the movable top frame (12), and the pipe clamping mechanism (5) comprises a pipe clamping arc frame (6) installed at the bottom of the movable top frame (12) through a bearing, and a pipe clamping ring groove (13) is provided on the inner side of the pipe clamping arc frame (6), and two clamping ring blocks (7) are slidably engaged inside the pipe clamping ring groove (13); A through hole is provided in the middle of the second sliding block (22), and a threaded sleeve (31) is installed in the through hole via a bearing; a threaded hole is provided in the middle of the threaded sleeve (31), and the movable screw rod (10) and the threaded sleeve (31) are sleeved and installed via the threaded hole; A block slide groove (32) is provided inside the second sliding block (22), and a vertically sliding threaded sleeve block (34) is installed inside the block slide groove (32); the bottom of the threaded sleeve block (34) is made of nickel-iron alloy; a second limit spring (35) is fixed between the bottom of the threaded sleeve block (34) and the bottom of the block slide groove (32); an electromagnet (33) is fixed at the bottom of the block slide groove (32) in the middle of the second limit spring (35); a slot hole is provided in the middle of the bottom of the threaded sleeve (31), and the threaded sleeve block (34) is engaged with the slot hole.

2. A welding device for a metal bellows according to claim 1, characterized in that: The limiting rod (11) is located in a slider slot (16) corresponding to the first slider (21), and the first slider (21) and the limiting rod (11) are slidably plugged and installed.

3. A welding device for a metal bellows according to claim 1, characterized in that: The movable screw rod (10) is located in a slider slot (16) corresponding to the second slider (22), and a threaded hole is provided in the middle of the second slider (22). The movable screw rod (10) and the second slider (22) are threadedly sleeved and installed.

4. A welding device for a metal bellows according to claim 1, characterized in that: A pipe clamping motor (9) is fixed to the middle of the bottom of the movable top frame (12) by bolts, and pipe clamping screws (8) are fixed to the rotating shafts on both sides of the pipe clamping motor (9). A threaded rod seat slot (17) is provided on the top of the pipe clamping arc frame (6) and a threaded rod seat (18) is fixed inside the threaded rod seat slot (17) by a bearing. The threaded rod seat (18) and the pipe clamping screw (8) are installed by threaded sleeve connection.

5. The welding equipment for metal bellows according to claim 1, characterized in that: A welding main frame (4) is mounted in the middle of the fixed top frame (3) via a bearing, an electric push rod is mounted at the bottom of the welding main frame (4), and a welding lifting frame (23) is fixed at the bottom of the electric push rod, a welding swing arm (28) is fixed at the bottom of the welding lifting frame (23) via a bearing, a welding gun (29) is mounted on one side of the welding swing arm (28), and a steering gear is mounted inside the welding main frame (4) and the welding swing arm (28), and the steering gear output shaft is fixed to the rotating shaft.

6. A welding device for a metal bellows according to claim 5, characterized in that: A tightening box (27) is hingedly connected to the bottom of the welding swing arm (28), and a slide groove is provided at both ends of the tightening box (27), and a tightening rod (26) is slidably engaged inside the slide groove, and tightening clamping plates (25) are installed at the ends of the tightening rod (26) at both ends.

7. A welding device for a metal bellows according to claim 6, characterized in that: A tightening rod toothed plate (24) is installed in the middle of the tightening rod (26), a tightening driving gear (30) is installed in the middle of the tightening box (27), and a motor is installed on the rotating shaft of the tightening driving gear (30), and the tightening driving gear (30) is meshed with the tightening rod toothed plate (24).

8. The welding equipment for metal bellows according to claim 1, characterized in that: A pipe clamping swing frame (15) is mounted on the top of the clamping ring block (7) via a bearing, and pipe clamping wheels (14) are mounted on both ends of the pipe clamping swing frame (15), the outer wall of the pipe clamping wheel (14) is made of soft rubber, and first limit springs (20) are mounted between both ends of the pipe clamping swing frame (15) and the clamping ring block (7), a driving groove is provided inside the clamping ring block (7), and a clamping ring block driving gear (19) is mounted inside the driving groove, and a motor is mounted on the rotating shaft of the clamping ring block driving gear (19), and an arc-shaped tooth plate is fixed to the inner wall of the pipe clamping ring groove (13), and the clamping ring block driving gear (19) is meshed with the arc-shaped tooth plate.

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