A bellows laser welding device

Abstract

The present invention discloses a bellows laser welding device, which belongs to the field of bellows welding technology. It aims to solve the problems that when welding the outer ring of the traditional bellows, a plug is used to make the fitting surface close together, which makes it difficult to ensure the concentricity of the annular plug, and it is difficult to remove the annular plug after the bellows welding is completed, and the removed annular plug is easily damaged. The above problems reduce the welding efficiency of the bellows and increase the cost of processing and manufacturing. The device includes a laser welding head, and two symmetrically distributed mounting blocks are provided at the bottom of the outer wall of the laser welding head, and four connecting bolts are connected between the two mounting blocks; the present invention avoids the use of the traditional method of using a plug to make the fitting surface close together when welding the outer ring connection, which makes it difficult to remove the annular plug after the bellows welding is completed, and the removed annular plug is easily damaged. Due to the high price of the annular plug, the cost of bellows welding is invisibly increased.

Description

Technical Field

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

[0002] Existing bellows welding devices, when in use, use micro-arc plasma welding to weld the inner rings of two corrugated rings to form a V-shaped corrugated ring. The outer ring connections of multiple V-shaped corrugated rings are then welded one by one to ultimately form a bellows. This method requires first placing an annular plug in the two corrugated rings beforehand. The inner ring connections are then welded using micro-arc plasma welding to form multiple V-shaped corrugated rings. The multiple V-shaped corrugated rings are then sequentially spliced ​​together, and the outer ring connections of adjacent V-shaped corrugated rings are welded one by one to form the bellows. However, since the V-shaped corrugated ring formed after welding the inner ring connections of the two corrugated rings is easily deformed, forming a figure-eight or saddle shape, when the multiple V-shaped corrugated rings are welded to form the bellows, the mating surfaces of the adjacent V-shaped corrugated rings are difficult to fully align, affecting the welding of the outer ring connections. Therefore, annular plugs are placed inside the two bellows before welding the inner ring. When welding the outer ring of the bellows, the plugs provide support, ensuring a tight fit between the V-shaped bellows. However, in actual use, there are issues such as difficulty adjusting the concentricity of the plugs, difficulty removing the plugs after welding, and the risk of damage once removed. These issues increase the manufacturing difficulty of bellows welding, reduce welding efficiency, and increase manufacturing costs.

[0003] Therefore, a bellows laser welding device is needed to address the existing problems of using a plug to weld the outer ring of a bellows, which results in problems such as difficulty in ensuring the concentricity of the ring plug, difficulty in removing the ring plug after welding, and the risk of damage to the removed ring plug. These issues reduce the welding efficiency of the bellows and increase the cost of manufacturing. Summary of the Invention

[0004] The object of the present invention is to provide a bellows laser welding device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: A bellows laser welding device comprises a laser welding head, wherein two symmetrically distributed mounting blocks are provided at the bottom of the outer side wall of the laser welding head, four connecting bolts are connected between the two mounting blocks, and the two mounting blocks are respectively provided with clamping arms on a side away from each other, and the two clamping arms are respectively provided with two first through-holes and a second through-hole on a side away from each other, and the two mounting blocks are respectively provided with two first threaded holes and a second threaded hole on a side away from each other, a second bolt is sleeved in the first through-hole, and the bottom of the second bolt is threadedly connected to the first threaded hole, a second spring is provided on the outer side wall of the second bolt, the second spring is located in the first threaded hole, and the first bolt is provided in the second through-hole, a first spring is provided on the outer side wall of the first bolt, and the bottom of the first bolt is threadedly connected to the second threaded hole, and a plurality of spherical grooves are respectively provided on the bottom of a side close to each other, and a rolling ball is movably connected in the spherical groove.

[0006] Furthermore, an operating table is provided below the laser welding head, a three-dimensional motion table is fixed to one side of the top surface of the operating table, and the laser welding head is fixed on the three-dimensional motion table.

[0007] Furthermore, a precision three-jaw chuck is fixed on the other side of the top surface of the operating table, and a limiting sleeve is detachably connected to the precision three-jaw chuck.

[0008] Furthermore, two semi-arc barrels are provided on the periphery of the limiting sleeve, two hooks are fixed on both sides of the outer wall of the top semi-arc barrel, and two buckles are fixed on both sides of the outer wall of the bottom semi-arc barrel, and the buckles are engaged with the corresponding hooks.

[0009] Furthermore, a supporting pin is fixed on the other side of the top surface of the operating table, and a resistance tube is provided on the side of the limiting sleeve close to the supporting pin, and the supporting pin cooperates with the resistance tube.

[0010] Furthermore, a display screen is fixed on the other side of the top surface of the operating table, and the three-dimensional motion table and the laser welding head are electrically connected to the display screen respectively.

[0011] Compared with the prior art, the bellows laser welding device provided by the present invention has at least the following beneficial effects:

[0012] By setting up a laser welding head, the welding quality of the connection between the outer ring of the corrugated ring is improved, and the weld formed by welding is more uniform, which avoids uneven welds when using plasma arc welding, resulting in a reduced service life of the bellows; by setting up the first bolt, the second bolt, the first spring, the second spring and the rolling ball, the side surfaces of the outer rings of the two adjacent V-shaped corrugated rings can be clamped, and at the same time, when the V-shaped corrugated ring rotates, the rolling ball can adjust the state of the deformed V-shaped corrugated ring in real time, so that when welding the connection between the outer rings of the two V-shaped corrugated rings, the fitting surfaces can always fit together, avoiding the use of traditional welding of the outer ring connection, which uses a plug to make the fitting surfaces fit together, resulting in the annular plug being difficult to remove after the bellows welding is completed, and the removed annular plug is easily damaged. Due to the high price of the annular plug, the cost of the bellows welding is invisibly increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0014] Figure 2 This is a schematic diagram of the installation block structure of the present invention;

[0015] Figure 3 This is a schematic diagram of the clamp arm structure of the present invention;

[0016] Figure 4 For the present invention Figure 3 A schematic diagram of the partially enlarged structure of the middle part;

[0017] Figure 5 This is a schematic diagram of the structure of the connection between the placement plate and the precision three-jaw chuck of the present invention;

[0018] Figure 6 This is a schematic diagram of the concentric disk structure of the present invention;

[0019] Figure 7 This is a schematic diagram of the structure of the conflict tube of the present invention;

[0020] Figure 8 This is a schematic diagram of the cross-sectional structure of the bellows of the present invention;

[0021] Figure 9 For the present invention Figure 8 A schematic diagram of the partially enlarged structure of B in the middle;

[0022] Figure 10 For the present invention Figure 8 Schematic diagram of the partially enlarged structure of C in the middle;

[0023] Figure 11 This is a schematic diagram of the side view of the structure of the rolling ball of the present invention when it contacts the side surface of the outer ring;

[0024] Figure 12 This is a schematic diagram of the first threaded hole structure of the present invention;

[0025] Figure 13 This is a schematic diagram of the second threaded hole structure of the present invention.

[0026] In the picture:

[0027] 100, operating table; 101, three-dimensional motion table; 102, laser welding head; 103, mounting block; 104, clamping arm; 105, first bolt; 106, first spring; 107, spherical groove; 108, rolling ball; 109, second bolt; 110, first threaded hole; 111, second spring; 112, first through-hole; 113, second threaded hole; 114, second through-hole;

[0028] 200, supporting pin; 201, resistance tube; 202, limiting sleeve;

[0029] 300, precision three-jaw chuck; 301, display screen; 302, placement plate; 303, cover plate; 304, concentric plate; 305, groove;

[0030] 400, semi-arc barrel; 401, buckle;

[0031] 500. Corrugated ring. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. It should be noted that, in the absence of conflict, the embodiments in this disclosure and the features in the embodiments can be combined, separated, interchanged and / or rearranged with each other. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0033] In the accompanying drawings, the sizes and relative sizes of components may be exaggerated for clarity and / or descriptive purposes. When the exemplary embodiments can be implemented differently, the specific process sequence may be performed in a different order than described. For example, two processes described in succession may be performed substantially simultaneously or in a reverse order from the described order. In addition, the same reference numerals represent the same components.

[0034] The terms used herein are for the purpose of describing specific embodiments and are not intended to be restrictive. As used herein, unless the context clearly indicates otherwise, the singular forms "one (kind, person)" and "said (the)" are also intended to include plural forms. In addition, when the terms "comprise" and / or "include" and their variations are used in this specification, the features, integral bodies, steps, operations, parts, assemblies and / or their groups stated are explained, but the presence or addition of one or more other features, integral bodies, steps, operations, parts, assemblies and / or their groups is not excluded. It should also be noted that, as used herein, the terms "substantially", "approximately" and other similar terms are used as approximate terms and not as degree terms, so that they are used to explain the inherent deviations of the measured values, calculated values ​​and / or the values ​​provided that will be recognized by those of ordinary skill in the art.

[0035] See also Figures 1-13 The present invention provides a corrugated pipe laser welding device, including a laser welding head 102, wherein two symmetrically distributed mounting blocks 103 are provided at the bottom of the outer side wall of the laser welding head 102, four connecting bolts are connected between the two mounting blocks 103, and the two mounting blocks 103 are respectively provided with clamping arms 104 on a side away from each other, and the two clamping arms 104 are respectively provided with two first through-holes 112 and second through-holes 114 on a side away from each other, and the two mounting blocks 103 are respectively provided with two first threaded holes 110 and second threaded holes 113 on a side away from each other, a second bolt 109 is sleeved in the first through-hole 112, and the bottom of the second bolt 109 is threadedly connected to the first threaded hole 110, a second spring 111 is provided on the outer side wall of the second bolt 109, and the second spring 111 is located in the first threaded hole 110, and the first threaded hole 110 is a T-shaped hole, and its inner wall threadedly connected to the bottom of the second bolt 109 has a thread, such as Figure 12 As shown, the inner wall near the clamping arm 104 has no threads, a first bolt 105 is provided in the second through-hole 114, a first spring 106 is provided on the outer wall of the first bolt 105, the bottom of the first bolt 105 is threadedly connected to the second threaded hole 113, and the two clamping arms 104 are respectively provided with a plurality of spherical grooves 107 at the bottom of one side close to each other, and a rolling ball 108 is movably connected in the spherical groove 107.

[0036] As a further solution of the present invention, an operating table 100 is provided below the laser welding head 102 , a three-dimensional motion table 101 is fixed to one side of the top surface of the operating table 100 , and the laser welding head 102 is fixed on the three-dimensional motion table 101 .

[0037] By setting up the three-dimensional motion platform 101, the three-dimensional motion platform 101 can realize the three-directional movement of the laser welding head 102, namely, forward and backward movement, vertical movement and left and right movement, ensuring that the laser welding head 102 can move freely in three-dimensional space, so as to facilitate laser welding of the outer ring connection of the V-shaped corrugated ring respectively.

[0038] As a further solution of the present invention, a precision three-jaw chuck 300 is fixed on the other side of the top surface of the operating table 100, and a limiting sleeve 202 is detachably connected to the precision three-jaw chuck 300.

[0039] By setting up the precision three-jaw chuck 300, the limiting sleeve 202 can be precisely fixed by the precision three-jaw chuck 300, and it is convenient to remove the limiting sleeve 202 from the precision three-jaw chuck 300; by setting up the limiting sleeve 202, multiple V-shaped corrugated rings can be sleeved on the limiting sleeve 202, thereby facilitating the subsequent positioning and welding of the outer ring of the V-shaped corrugated ring.

[0040] As a further solution of the present invention, two semi-arc barrels 400 are arranged on the periphery of the limiting sleeve 202, and two hooks are fixed on both sides of the outer wall of the top semi-arc barrel 400, and two buckles 401 are fixed on both sides of the outer wall of the bottom semi-arc barrel 400, and the buckles 401 are engaged with the corresponding hooks.

[0041] By setting up the semi-arc barrel 400, after multiple V-shaped corrugated rings are set on the periphery of the limiting sleeve 202, two semi-arc barrels 400 can be set on the periphery of the multiple V-shaped corrugated rings. This setting can concentrically set the outer rings of the multiple V-shaped corrugated rings, effectively making the outer ring fitting surfaces of the multiple V-shaped corrugated rings fully contact, avoiding the appearance of gaps between the fitting surfaces, and affecting the welding effect of the bellows.

[0042] As a further solution of the present invention, a supporting pin 200 is fixed on the other side of the top surface of the operating table 100 , and a resistance tube 201 is provided on the side of the limiting sleeve 202 close to the supporting pin 200 , and the supporting pin 200 cooperates with the resistance tube 201 .

[0043] By setting the supporting thimble 200, after the V-shaped corrugated ring is placed on the periphery of the limiting sleeve 202, the contact tube 201 can be placed on the side of the limiting sleeve 202 close to the supporting thimble 200, and then the turntable on the supporting thimble 200 is rotated to make the thimble part of the supporting thimble 200 move and engage with the contact tube 201, finally making the contact tube 201 able to form a movable connection with the supporting thimble 200, ensuring the stability of the limiting sleeve 202 during rotation, and preventing the limiting sleeve 202 from deviating from the axis of the precision three-jaw chuck 300 during rotation, which affects the welding of the bellows.

[0044] As a further solution of the present invention, a display screen 301 is fixed to the other side of the top surface of the operating table 100 , and the three-dimensional motion table 101 and the laser welding head 102 are electrically connected to the display screen 301 respectively.

[0045] By providing the display screen 301 , various parameters of the laser welding head 102 and the three-dimensional motion stage 101 can be set and displayed, making it easy to observe the operation of the entire device in a timely manner.

[0046] When welding the inner rings of two symmetrical corrugated rings 500 , a placement plate 302 is connected to the precision three-jaw chuck 300 , and a cover plate 303 and a concentric plate 304 are provided on the placement plate 302 .

[0047] In summary: when welding the inner rings of the two symmetrical corrugated rings 500, first fix the placement plate 302 on the precision three-jaw chuck 300, then place the two symmetrical corrugated rings 500 in the groove 305, and then place the concentric plate 304 in the placement plate 302. At this time, the inner walls of the two corrugated rings 500 are in contact with the outer walls of the concentric plate 304, and the two corrugated rings 500 are concentric. Then, place the cover plate 303 on one side of the placement plate 302, and then connect the cover plate 303 to the placement plate 302 by tightening the bolts. At this time, the two corrugated rings 500 are clamped between the cover plate 303 and the placement plate 302, then take out the concentric plate 304, and operate the display screen 301. , the three-dimensional motion table 101 is operated, and the head of the laser welding head 102 is moved to the connection between the inner rings of the two corrugated rings 500. Then, the precision three-jaw chuck 300 is started, and the three jaws of the precision three-jaw chuck 300 are rotated, thereby driving the placement plate 302 to rotate, and finally the two corrugated rings 500 are rotated. Then, the laser welding head 102 is started, and the laser welding head 102 is welded to the connection between the inner rings. After the welding is completed, the three-dimensional motion table 101 is operated to remove the laser welding head 102 from the connection between the inner rings, and then the tightening bolts are removed. The V-shaped corrugated ring that has been welded to form an integral body is removed to complete the welding of the inner rings of the V-shaped corrugated rings in one process. Then, according to the above steps for welding the V-shaped corrugated rings, the remaining inner rings of the corrugated rings 500 are welded to obtain multiple V-shaped corrugated rings.

[0048] After the inner ring welding is completed, the V-shaped corrugated ring formed is welded to the outer ring to form the final corrugated tube, and the placement plate 302 is removed from the precision three-jaw chuck 300, and the limiting sleeve 202 is clamped on the three claws of the precision three-jaw chuck 300 to fix the limiting sleeve 202, and then multiple V-shaped corrugated rings are set on the outer periphery of the limiting sleeve 202, and then the two semi-arc barrels 400 are placed on the outer periphery of the multiple V-shaped corrugated rings, and then the buckle 401 is operated to make the buckle 401 engage with the corresponding hook. At this time, the outer peripheries of the multiple V-shaped corrugated rings are concentric, and then the resistance tube 201 is rotated so that the side of the resistance tube 201 close to the corrugated ring 500 contacts the corrugated ring 500, and the multiple V-shaped corrugated rings are squeezed so that the fitting surfaces of the two adjacent V-shaped corrugated rings are tightly fitted, and then the buckle 401 is operated to separate the buckle 401 from the hook. Then, the two mounting blocks 103 are connected to the bottom position of the outer wall of the laser welding head 102 by connecting bolts, and then the second bolt 109 is rotated to increase the distance between the two clamping arms 104, and then the first bolt 105 is rotated to make the first bolt 105 rotate to a state where it is about to be separated from the second threaded hole 113. At this time, the first bolt 105 is still connected to the second threaded hole 113. During this process, due to the movement of the first bolt 105, the compressed first spring 106 slowly releases its elastic force, making the clamping arm 104 movable. Since the second bolt 109 has moved, the second spring 111 pushes the clamping arm 104 to move, making the two clamping arms 104 move away from each other. The initial states of the first bolt 105 and the second bolt 109 in the above process are as follows: Figure 12 and 13As shown. The display screen 301 is then operated to move the three-dimensional motion platform 101 to the connection point between the two V-shaped corrugated outer rings, away from the support pin 200. At this point, the two clamping arms 104 are located at the connection point between the two V-shaped corrugated outer rings. The first bolts 105 are then rotated separately, and the positions of the scale lines are observed to ensure that the first bolts 105 move the same distance. During this process, the first spring 106 pushes the clamping arm 104 to move, causing the balls 108 on the clamping arm 104 to contact the side surfaces of the adjacent V-shaped corrugated outer rings, completing the initial adjustment. The second bolt 109 is then rotated to move until its head contacts the clamping arm 104. Continued rotation pushes the clamping arm 104 to move, causing the balls 108 on the two clamping arms 104 to press against the side surfaces of the adjacent V-shaped corrugated outer rings, achieving stable clamping of the adjacent V-shaped corrugated outer rings. Then the precision three-jaw chuck 300 rotates, causing the limiting sleeve 202 to rotate, and then causing multiple V-shaped corrugated rings to rotate, and at the same time starting the laser welding head 102. When two adjacent V-shaped corrugated rings rotate, since the rolling ball 108 is always in contact with the side of the outer ring, when the head of the laser welding head 102 welds the outer ring connection, the contact surfaces of the two V-shaped corrugated rings can always be in contact, and the deformed V-shaped corrugated ring is pulled to a normal state, so that the outer ring connection is laser welded together. When the outer ring connection is welded, the first bolt 105 and the second bolt are rotated in the opposite direction. Bolt 109, so that the two clamping arms 104 move away from each other, operate the three-dimensional motion platform 101, and the three-dimensional motion platform 101 controls the laser welding head 102 to move to the next outer ring connection. At this time, the two clamping arms 104 are on the side of the outer ring of the next adjacent V-shaped corrugated ring. Then, according to the steps of clamping the side of the adjacent V-shaped corrugated ring outer ring in the above process, the side of the next adjacent V-shaped corrugated ring outer ring can be clamped. Then, according to the above welding process steps, the position can be welded. Repeat this process so that multiple V-shaped corrugated ring outer rings are welded together to finally form a bellows. When removing the bellows, operate the three-dimensional motion platform 101 to move the laser welding head 102 to another position, then rotate the contact tube 201 to separate the contact tube 201 from the limiting sleeve 202, and finally remove the bellows from the limiting sleeve 202.

[0049] When welding the inner ring of the V-shaped corrugated ring, the clamping arm 104 is not installed at the bottom of the laser welding head 102 . Figure 1 and Figure 2 The 102 components are all laser welding heads 102. Figure 3 The width d of the middle clamp arm 104 is 20 mm, corresponding to a 175 mm diameter of the corrugated ring 500. Multiple clamp arms 104 are available, with widths d ranging from 15 to 20 mm. The appropriate clamp arm 104 should be selected based on the diameter of the corrugated ring 500 to be welded.

[0050] The elastic force of the first spring 106 is greater than that of the second spring 111 .

[0051] Figure 12 and Figure 13 This is a state diagram of the first bolt 105 and the second bolt 109 when two clamping arms 104 clamp the side surfaces of the outer rings of adjacent V-shaped corrugated rings.

[0052] The three-dimensional motion table 101, the laser welding head 102, the precision three-jaw chuck 300 and the supporting ejector 200 can all be purchased on the market. They are mature technologies in this field and have been fully disclosed, so they are not repeated in the specification.

[0053] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A bellows laser welding device, comprising a laser welding head (102), characterized in that: Two symmetrically distributed mounting blocks (103) are provided at the bottom of the outer wall of the laser welding head (102), four connecting bolts are connected between the two mounting blocks (103), and the two mounting blocks (103) are provided with clamping arms (104) on the side away from each other, and the two clamping arms (104) are provided with two first through holes (112) and second through holes (114) on the side away from each other, and the two mounting blocks (103) are provided with two first threaded holes (110) and second threaded holes (113) on the side away from each other, a second bolt (109) is sleeved in the first through hole (112), and the bottom of the second bolt (109) is threadedly connected to the first threaded hole (110), and the second bolt A second spring (111) is provided on the outer wall of (109), the second spring (111) is located in the first threaded hole (110), a first bolt (105) is provided in the second through hole (114), a first spring (106) is provided on the outer wall of the first bolt (105), the bottom of the first bolt (105) is threadedly connected to the second threaded hole (113), a plurality of spherical grooves (107) are respectively provided at the bottom of a side surface close to each other, a rolling ball (108) is movably connected in the spherical groove (107), an operating table (100) is provided below the laser welding head (102), a three-dimensional motion table (101) is fixed on one side of the top surface of the operating table (100), the laser The welding head (102) is fixed on the three-dimensional motion table (101), and a precision three-jaw chuck (300) is fixed on the other side of the top surface of the operating table (100). A limiting sleeve (202) is detachably connected to the precision three-jaw chuck (300), and two semi-arc barrels (400) are arranged on the periphery of the limiting sleeve (202). Two hooks are fixed on both sides of the outer wall of the top semi-arc barrel (400), and two buckles (401) are fixed on both sides of the outer wall of the bottom semi-arc barrel (400). The buckles (401) are engaged with the corresponding hooks. A supporting pin (200) is fixed on the other side of the top surface of the operating table (100), and the limiting sleeve (202) is close to the side of the supporting pin (200). A resistance tube (201) is provided, and the supporting ejector pin (200) cooperates with the resistance tube (201). A placement disk (302) is detachably connected to the precision three-jaw chuck (300), and a cover disk (303) and a concentric disk (304) are provided on the placement disk (302). When welding the inner rings of two symmetrical corrugated rings, the placement disk is first fixed on the precision three-jaw chuck, and then the two symmetrical corrugated rings are placed in the groove, and then the concentric disk is placed in the placement disk. At this time, the inner walls of the two corrugated rings are in contact with the outer walls of the concentric disk, and the two corrugated rings are concentric. Then the cover disk is placed on one side of the placement disk, and then the cover disk is connected to the placement disk by tightening the bolts. At this time, the two corrugated rings are clamped between the cover disk and the placement disk, and then the concentric disk is taken out.Move the laser welding head to the connection between the inner rings of the two corrugated rings, then start the precision three-jaw chuck, causing the three jaws of the precision three-jaw chuck to rotate, thereby driving the placement plate to rotate, and finally causing the two corrugated rings to rotate. Then start the laser welding head to weld the connection between the inner rings. When welding the V-shaped corrugated ring formed after the inner ring welding is completed, remove the placement plate from the precision three-jaw chuck, and then clamp the limit sleeve on the three jaws of the precision three-jaw chuck to fix the limit sleeve. After clamping the V-shaped corrugated ring, use the laser welding head to weld it.

2. The bellows laser welding device according to claim 1, characterized in that: A display screen (301) is fixed on the other side of the top surface of the operating table (100), and the three-dimensional motion table (101) and the laser welding head (102) are electrically connected to the display screen (301) respectively.

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