Pulse electric arc welding device of shell-and-tube heat exchanger tube plate automatic forming machine tool

Abstract

The invention relates to the technical field of pulse electric arc welding, and discloses a pulse electric arc welding device of a shell-and-tube heat exchanger tube plate automatic forming machine tool, which comprises a machine tool frame, an electric module sliding table frame is arranged on the machine tool frame, a heat exchanger tube main body is placed on one side of the machine tool frame, and a positioning assembly is arranged on the electric module sliding table frame. Two sets of adjusting assemblies are arranged on one side of the positioning assembly, an adjusting assembly is arranged on the other side of the positioning assembly, an electric arc welding gun is arranged on the upper side of the adjusting assembly, and the positioning assembly comprises a hollow rod fixedly arranged at one end of a movable part of an electric module sliding table frame. According to the pulse electric arc welding device of the automatic forming machine tool for the tube plate of the shell-and-tube heat exchanger, through overall cooperation, the roller inner support is located in the welded round tube, the deviation condition in the welding process is avoided, and the round tubes needing to be welded in each electric module sliding table frame are kept consistent in order.

Description

Technical Field

[0001] This invention relates to the field of pulsed arc welding technology, and in particular to a pulsed arc welding device for an automatic forming machine tool for shell-and-tube heat exchanger tube sheets. Background Technology

[0002] Shell-and-tube heat exchanger tube sheets are widely used in industries such as chemical, petroleum, power, and pharmaceutical, serving as condensers and heaters in chemical production, steam condensers in power plants, and heat exchangers in pharmaceutical equipment. They are key components for achieving heat exchange between hot and cold fluids. However, during the welding process, heat exchange tubes typically need to be inserted one by one, which is difficult to align and maintain flatness. Previously, manual adjustment was not only inefficient but also struggled to ensure consistent flatness across multiple tubes. Furthermore, the lack of guide tubes during welding makes them prone to misalignment due to the impact of the electric arc and the thrust of the airflow, further increasing the difficulty of adjustment. Summary of the Invention

[0003] The main objective of this invention is to provide a pulsed arc welding device for an automatic forming machine tool for shell-and-tube heat exchanger tube sheets, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A pulsed arc welding device for an automatic forming machine tool for shell-and-tube heat exchanger tube sheets includes a machine frame with an electric module slide mounted on it. A heat exchanger tube body is placed on one side of the machine frame. A positioning component is mounted on the electric module slide. Two sets of adjustment components are located on one side of the positioning component, and an adjustment component is located on the other side. An arc welding gun is mounted on the upper side of the adjustment component. The positioning component includes a hollow rod fixedly mounted at one end of a movable part of the electric module slide. A control rod is movably mounted inside the hollow rod. Two sets of fixing rings are fixedly mounted on the outer side of the control rod near the adjustment component. A first bevel gear is fixedly installed on the outer side of the rod near the fixed ring. A connecting sleeve is movably fitted on the outer side of the control rod near the fixed ring. A Z-shaped component is fixedly installed on the upper end of the connecting sleeve. A cylinder is fixedly installed on the upper end of the hollow rod. Sliding openings are provided on the front, rear, and upper sides of the hollow rod corresponding to the positions of the connecting sleeve and the Z-shaped component, respectively. A positioning cylinder is fixedly installed at one end of the hollow rod. A double conical block is fixedly installed at one end of the control rod near the inside of the positioning cylinder. Three sets of U-shaped frames are slidably installed on the inner side of the positioning cylinder. A wheel frame is fixedly installed in the middle of the U-shaped frame. Two sets of rollers are rotatably installed on the upper side of the wheel frame. Limit strips are slidably installed on both sides of the U-shaped frame.

[0005] Preferably, the adjustment assembly includes a sliding sleeve movably disposed on the front side of the connecting sleeve. A round shaft is fixedly disposed at the connection between the sliding sleeve and the connecting sleeve. A first gear is fixedly disposed at both the upper and lower ends of the round shaft. Two sets of trapezoidal blocks are fixedly disposed on the outer side of the first gear. Slide bars are fixedly disposed on the upper and lower sides of the hollow rod near the sliding port. A rack is partially fixedly disposed on the slide bar. A movable block is slidably disposed inside the sliding sleeve. An adjusting shaft is threadedly connected to one side of the movable block. A threaded cylinder is threadedly connected to the other side of the movable block. A slide rod is slidably disposed inside the threaded cylinder. A push seat is fixedly disposed on both the front and rear sides of one end of the connecting sleeve near the control rod. A movable rod is movably disposed inside the push seat. A second bevel gear is fixedly disposed at the rear end of the movable rod. A spring is fixedly disposed on the outer side of the movable rod near the push seat and the second bevel gear. A universal joint is fixedly installed between the movable rod and the slide rod.

[0006] Preferably, the adjusting assembly includes two sets of limiting rings fixedly disposed on the outside of the hollow rod. Two sets of circular sleeves are disposed on the outside and upper side of the hollow rod. A second gear is fixedly disposed at one end of the lower set of the two sets of circular sleeves. A fixed shaft is fixedly disposed at the corresponding end of each of the two sets of circular sleeves. A sliding frame is fixedly disposed on one side of each of the two sets of fixed shafts. A movable shaft is slidably disposed on the inner side of each of the two sets of sliding frames. A fixed block is fixedly disposed on the lower set of the two sets of fixed shafts and movable shafts. A threaded rod is movably disposed on the inner side of each of the two sets of fixed blocks. A scissor linkage connects the two sets of fixed shafts and movable shafts. A groove is formed on the side of the hollow rod near the circular sleeve. A fixed sleeve is fixedly disposed on the inner wall of one side of the groove. A motor is fixedly mounted on the movable part of the electric module slide frame. Synchronous pulleys are disposed on the outer side of the motor rotating shaft and the fixed sleeve. Synchronous belts are sleeved on the outer side of the two sets of synchronous pulleys. A third gear is fixedly disposed at one end of the motor rotating shaft.

[0007] Preferably, the fixing ring on the outside of the control rod is adapted to the internal cavity of the hollow rod, the connecting sleeve and the Z-shaped piece pass through three sets of sliding ports respectively, the cylinder telescopic rod is fixedly connected to the Z-shaped piece, the upper set of the three sets of sliding ports is shorter, the double cone block is slidably set in the positioning cylinder, the square opening on the inner side of the U-shaped frame corresponding to the limiting strip is provided with a tension spring piece fixedly connected between the limiting strip and the inner wall, the wheel frame is made of elastic material, and the limiting strip is fixedly connected to the positioning cylinder.

[0008] Preferably, the circular shaft and the connecting sleeve are rotatably configured, the outer side of the first gear is configured with a partial tooth block, the two sets of trapezoidal blocks are at ninety degrees, one of the two sets of trapezoidal blocks is fitted with the slide bar, the slide bar has movable openings on both sides near the rack, and the rack is adapted to the tooth block on the first gear.

[0009] Preferably, the second bevel gear meshes with the first bevel gear, and the size of the universal joint connection port structure is such that the position of the sliding rod changes when it rotates 90 degrees and contacts the push seat to pull the movable rod.

[0010] Preferably, the second gear and the lower sleeve are fitted on the outside of the hollow rod near the two sets of limiting rings, the movable shaft is engaged inside the slide frame, the fixing block on the fixed shaft is movably connected to the threaded rod, and the fixing block on the movable shaft is threadedly connected to the threaded rod.

[0011] Preferably, the scissor lift links are arranged in a cross configuration, the synchronous pulley in the groove is rotatably connected to the fixed sleeve and slidably connected to the control lever, the other set of the two sets of synchronous pulleys is fixedly connected to the motor rotating shaft, and the third gear is meshed with the second gear.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. The electric module slide table moves the arc welding gun, inserts the positioning cylinder into the round tube to be welded inside the electric module slide table, and then the cylinder pushes the Z-shaped part and the connecting sleeve to slide in the hollow rod. At this time, the connecting sleeve will control the two-sided adjustment components to unfold, adjust the round tube to be welded, the double cone block moves away to the underside of the U-shaped frame, and the three U-shaped frames will move towards the center and retract into the positioning cylinder. However, after the adjustment components are adjusted, the cylinder pulls back the double cone block and pushes out the three U-shaped frames. The rollers will then be supported inside the round tube to position it and prevent displacement during the welding process.

[0013] 2. The motor drives the connected synchronous pulley and third gear to rotate, and the rotating third gear drives the meshing second gear and the circular sleeve to rotate, driving the upper circular sleeve and the arc welding gun to rotate, and the arc welding gun to perform welding work. Before work, the threaded fixed block and the movable shaft are driven to slide in the slide frame by turning the threaded rod. The scissor fork linkage raises the upper circular sleeve and the arc welding gun, adjusting the distance between the two sets of circular sleeves to adapt to the circular pipes of different specifications that need to be welded. At the same time, the rotating synchronous pulley drives the synchronous belt to drive the lower synchronous pulley to rotate, causing the sliding control rod to rotate, thereby realizing the driving and adjustment of the adjustment components on both sides.

[0014] 3. Before the cylinder is pushed, the distance in the movable block is moved out by turning the adjusting shaft to match the length of the round pipe to be welded. The control rod and connecting sleeve drive the second bevel gear to rotate, which causes the slide rod to drive the threaded cylinder to rotate, causing the movable blocks on both sides to slide in the slide sleeve, driving the adjusting shafts on both sides to move closer or further apart, to match the distance between different welded round pipes.

[0015] 4. When the connecting sleeve moves the two sliding sleeves, the trapezoidal block moves against the slide bar, maintaining the sliding sleeve state during movement. The two sliding sleeves will push the round tube to move until the adjusting shaft hits the outer shell of the heat exchanger tube body, aligning the round tubes to be welded in each set of electric module slide frames. When the cylinder pulls back the double conical block, it supports the three sets of U-shaped frames, positioning the round tubes welded to the electric module slide frame. At the same time, it drives the connecting sleeve and the two sets of sliding sleeves to move back. The first gear meshes with the rack, causing the other set of trapezoidal blocks to slide against the slide bar. The sliding sleeve rotates ninety degrees, folding up the two sliding sleeves to maintain their state. The slide rod first contacts the push seat. When it rotates ninety degrees, it pulls the movable rod through the universal joint and the second bevel gear squeezes the spring, thereby disengaging the second bevel gear from the first bevel gear. This prevents the distance between the two adjusting shafts from being adjusted again when the motor drives the control rod to rotate. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the pulsed arc welding device of the automatic forming machine tool for shell and tube heat exchanger tube sheets according to the present invention. Figure 2 This is a schematic diagram of the welding part structure of the pulse arc welding device of the automatic forming machine tool for shell and tube heat exchanger tube sheets according to the present invention. Figure 3 This is a partial structural diagram of the pulse arc welding device for an automatic tube sheet forming machine tool for shell-and-tube heat exchangers according to the present invention. Figure 1 ; Figure 4 This is a partial structural diagram of the pulse arc welding device for an automatic tube sheet forming machine tool for shell-and-tube heat exchangers according to the present invention. Figure 2 ; Figure 5 This is a schematic diagram of the partial positioning and adjustment components of the pulse arc welding device for an automatic tube sheet forming machine tool for shell-and-tube heat exchangers according to the present invention. Figure 1 ; Figure 6 This is a schematic diagram of the partial positioning and adjustment components of the pulse arc welding device for an automatic tube sheet forming machine tool for shell-and-tube heat exchangers according to the present invention. Figure 2 ; Figure 7 This invention relates to a pulsed arc welding device for an automatic tube sheet forming machine for shell-and-tube heat exchangers. Figure 5 Enlarged structural diagram of section A in the middle; Figure 8 This invention relates to a pulsed arc welding device for an automatic tube sheet forming machine for shell-and-tube heat exchangers. Figure 6 Enlarged structural diagram of section B in the middle; Figure 9 This is a schematic diagram of the local adjustment component structure of the pulse arc welding device of the automatic tube sheet forming machine tool for shell and tube heat exchangers according to the present invention. Figure 1 ; Figure 10 This is a schematic diagram of the local adjustment component structure of the pulse arc welding device of the automatic tube sheet forming machine tool for shell and tube heat exchangers according to the present invention. Figure 2 .

[0017] In the diagram: 1. Machine tool frame; 2. Electric module slide table; 3. Heat exchanger tube body; 4. Positioning assembly; 41. Hollow rod; 42. Control rod; 43. Fixing ring; 44. First bevel gear; 45. Connecting sleeve; 46. Z-shaped part; 47. Cylinder; 48. Sliding port; 49. Positioning cylinder; 410. Double cone block; 411. U-shaped frame; 412. Wheel frame; 413. Roller; 414. Limiting strip; 5. Adjusting assembly; 51. Sliding sleeve; 52. Round shaft; 53. First gear; 54. Trapezoidal block; 55. Sliding strip; 56. Rack; 57. Live... 58. Moving block; 59. Adjusting shaft; 50. Threaded cylinder; 510. Slide rod; 511. Push seat; 512. Moving rod; 513. Second bevel gear; 514. Spring; 515. Universal joint; 6. Adjusting assembly; 61. Limiting ring; 62. Round sleeve; 63. Second gear; 64. Fixed shaft; 65. Slide frame; 66. Moving shaft; 67. Fixed block; 68. Threaded rod; 69. Scissor fork connecting rod; 610. Groove; 611. Fixed sleeve; 612. Motor; 613. Synchronous pulley; 614. Synchronous belt; 615. Third gear; 7. Arc welding gun. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0019] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship as a relative relationship of orientation or position, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0020] Please see Figures 1-10An embodiment of the present invention provides a pulsed arc welding device for an automatic forming machine tool for shell-and-tube heat exchanger tube sheets, comprising a machine frame 1, an electric module slide 2 mounted on the machine frame 1, a heat exchanger tube body 3 placed on one side of the machine frame 1, a positioning component 4 provided on the electric module slide 2, two sets of adjustment components 5 provided on one side of the positioning component 4, and an adjustment component 6 provided on the other side of the positioning component 4. An arc welding gun 7 is provided on the upper side of the adjustment component 6. The positioning component 4 includes a hollow rod 41 fixedly disposed at one end of the movable part of the electric module slide 2, a control rod 42 movably disposed inside the hollow rod 41, and two sets of fixing rings 43 fixedly disposed on the outer side of the control rod 42 near the adjustment component 5. A first bevel gear 44 is fixedly installed at position 3. A connecting sleeve 45 is movably sleeved between the outer side of the control rod 42 and the fixed ring 43. A Z-shaped piece 46 is fixedly installed on the upper end of the connecting sleeve 45. A cylinder 47 is fixedly installed on the upper end of the hollow rod 41. Sliding ports 48 are opened on the front and rear sides and the upper side of the hollow rod 41, corresponding to the positions of the connecting sleeve 45 and the Z-shaped piece 46, respectively. A positioning cylinder 49 is fixedly installed at one end of the hollow rod 41. A double cone block 410 is fixedly installed at one end of the control rod 42 near the inside of the positioning cylinder 49. Three sets of U-shaped frames 411 are slidably installed on the inner side of the positioning cylinder 49. A wheel frame 412 is fixedly installed in the middle position of the U-shaped frame 411. Two sets of rollers 413 are rotatably installed on the upper side of the wheel frame 412. Limit strips 414 are slidably installed on both sides of the U-shaped frame 411.

[0021] The fixing ring 43 on the outside of the control lever 42 is adapted to the internal cavity of the hollow rod 41. The connecting sleeve 45 and the Z-shaped piece 46 pass through three sets of sliding ports 48 respectively. The cylinder 47 telescopic rod is fixedly connected to the Z-shaped piece 46. The upper set of the three sets of sliding ports 48 is shorter. The double cone block 410 is slidably set in the positioning cylinder 49. The square opening on the inner side of the U-shaped frame 411 corresponding to the limit strip 414 is provided with a tension spring piece fixedly connected between the limit strip 414 and the inner wall. The wheel frame 412 is made of elastic material. The limit strip 414 is fixedly connected to the positioning cylinder 49.

[0022] The electric module slide 2 drives the arc welding gun 7 to move, inserting the positioning cylinder 49 into the round tube to be welded inside the electric module slide 2. Then, the cylinder 47 pushes the Z-shaped part 46 and the connecting sleeve 45 to slide in the hollow rod 41. At this time, the connecting sleeve 45 will control the two-sided adjustment components 5 to unfold, adjusting the round tube to be welded. The double cone block 410 moves away to the underside of the U-shaped frame 411, and the three sets of U-shaped frames 411 will move towards the center and retract into the positioning cylinder 49. However, after the adjustment components 5 are adjusted, the cylinder 47 pulls back the double cone block 410 and pushes out the three sets of U-shaped frames 411. The roller 413 will then be supported inside the round tube to position it and prevent displacement during the welding process.

[0023] Adjustment component 5 includes a sliding sleeve 51 movably disposed on the front side of the connecting sleeve 45. A round shaft 52 is fixedly disposed at the connection between the sliding sleeve 51 and the connecting sleeve 45. A first gear 53 is fixedly disposed at both the upper and lower ends of the round shaft 52. Two sets of trapezoidal blocks 54 are fixedly disposed on the outer side of the first gear 53. Slide bars 55 are fixedly disposed on both the upper and lower sides of the hollow rod 41 near the sliding port 48. A rack 56 is partially fixedly disposed on the slide bar 55. A movable block 57 is slidably disposed inside the sliding sleeve 51. An adjustment shaft 58 is threadedly connected to one side of the movable block 57. On the other side of the movable block 57, a threaded cylinder 59 is internally threaded. A slide rod 510 is slidably arranged inside the threaded cylinder 59. A push seat 511 is fixedly arranged on both the front and rear sides of the connecting sleeve 45 near the control rod 42. A movable rod 512 is movably arranged inside the push seat 511. A second bevel gear 513 is fixedly arranged at the rear end of the movable rod 512. A spring 514 is fixedly arranged between the push seat 511 and the second bevel gear 513 on the outer side of the movable rod 512. A universal joint 515 is fixedly installed between the movable rod 512 and the slide rod 510.

[0024] The round shaft 52 and the connecting sleeve 45 are rotatably set. The outer side of the first gear 53 is set with a partial tooth block. The two sets of trapezoidal blocks 54 are at ninety degrees. One set of the two sets of trapezoidal blocks 54 is fitted with the slide bar 55. The slide bar 55 has movable openings on both sides near the rack 56. The rack 56 is adapted to the tooth block on the first gear 53. The second bevel gear 513 is meshed with the first bevel gear 44. The size of the connection port structure of the universal joint 515 is sufficient to allow the slide rod 510 to rotate ninety degrees and contact the push seat 511 to pull the position change of the movable rod 512.

[0025] Before the cylinder 47 is pushed, the distance in the movable block 57 is moved by turning the adjusting shaft 58 to match the length of the round tube to be welded. The control rod 42 and the connecting sleeve 45 drive the second bevel gear 513 to rotate, causing the slide rod 510 to drive the threaded cylinder 59 to rotate, which drives the movable blocks 57 on both sides to slide in the sliding sleeve 51, driving the adjusting shafts 58 on both sides to move closer or further apart to match the distance between different round tubes to be welded. In addition, when the connecting sleeve 45 drives the sliding sleeves 51 on both sides to move, the trapezoidal block 54 moves against the slide bar 55, keeping the sliding sleeve 51 in its state during the movement. The sliding sleeves 51 on both sides will push the round tube to move until the adjusting shaft 58 hits the outer shell of the heat exchanger tube body 3, aligning the round tubes to be welded in each set of electric module slide table 2. While maintaining consistency, when the cylinder 47 pulls back the double conical block 410, it supports the three sets of U-shaped frames 411, positioning the round tube welded to the electric module slide frame 2. At the same time, it drives the connecting sleeve 45 and the two sets of sliding sleeves 51 to move back. The first gear 53 meshes with the rack 56, causing the other set of trapezoidal blocks 54 to slide against the slide bar 55. The sliding sleeve 51 rotates ninety degrees, folding up the two sides of the sliding sleeve 51 to maintain its state. The slide rod 510 first contacts the push seat 511. When it rotates ninety degrees, it pulls the movable rod 512 through the universal joint 515, and the second bevel gear 513 squeezes the spring 514, thereby causing the second bevel gear 513 to disengage from the first bevel gear 44. This prevents the distance between the two adjusting shafts 58 from being adjusted again when the motor 612 drives the control rod 42 to rotate.

[0026] Adjustment component 6 includes two sets of limiting rings 61 fixedly disposed on the outer side of hollow rod 41. Two sets of circular sleeves 62 are disposed on the outer and upper sides of hollow rod 41. A second gear 63 is fixedly disposed at one end of the lower set of the two sets of circular sleeves 62. A fixed shaft 64 is fixedly disposed at the corresponding end of each set of circular sleeves 62. A sliding frame 65 is fixedly disposed on one side of each set of fixed shafts 64. A movable shaft 66 is slidably disposed on the inner side of each set of sliding frames 65. A fixing block 67 is fixedly disposed on the lower set of the two sets of fixed shafts 64 and the movable shaft 66. Threaded rods 68 are movably provided on the inner side of 67. A scissor rod 69 connects the two sets of fixed shafts 64 and movable shafts 66. A groove 610 is opened on the side of the hollow rod 41 near the round sleeve 62. A fixed sleeve 611 is fixedly provided on the inner wall of one side of the groove 610. A motor 612 is fixedly installed on the movable part of the electric module slide frame 2. Synchronous pulleys 613 are provided on the outer side of the rotating shaft of the motor 612 and the fixed sleeve 611. Synchronous belts 614 are sleeved on the outer side of the two sets of synchronous pulleys 613. A third gear 615 is fixedly provided at one end of the rotating shaft of the motor 612.

[0027] The second gear 63 and the lower sleeve 62 are fitted on the outside of the hollow rod 41 near the two sets of limiting rings 61. The movable shaft 66 is engaged with the inner side of the slide frame 65. The fixing block 67 on the fixed shaft 64 is movably connected to the threaded rod 68. The fixing block 67 on the movable shaft 66 is threadedly connected to the threaded rod 68. The scissor fork connecting rod 69 is arranged in a cross configuration. The synchronous wheel 613 in the groove 610 is rotatably set with the fixed sleeve 611 and slidably connected with the control rod 42. The other set of the two sets of synchronous wheels 613 is fixedly set with the rotating shaft of the motor 612. The third gear 615 is meshed with the second gear 63.

[0028] The motor 612 drives the connected synchronous pulley 613 and third gear 615 to rotate. The rotating third gear 615 drives the meshing second gear 63 and the circular sleeve 62 to rotate, which in turn drives the upper circular sleeve 62 and the arc welding gun 7 to rotate. The arc welding gun 7 then performs the welding work. Before the work begins, the threaded fixed block 67 and the movable shaft 66 are driven to slide in the slide frame 65 by turning the threaded rod 68. The scissor fork linkage 69 lifts the upper circular sleeve 62 and the arc welding gun 7, adjusting the distance between the two sets of circular sleeves 62 to accommodate different specifications of circular pipes that need to be welded. At the same time, the rotating synchronous pulley 613 drives the synchronous belt 614 to drive the lower synchronous pulley 613 to rotate, causing the sliding control rod 42 to rotate, thereby realizing the driving and adjustment of the two side adjustment components 5.

[0029] Working principle: During use, the existing electric module slide table 2 drives the arc welding gun 7 to move, inserting the positioning cylinder 49 into the round tube to be welded inside the electric module slide table 2. Then, the cylinder 47 pushes the Z-shaped part 46 and the connecting sleeve 45 to slide in the hollow rod 41. At this time, the connecting sleeve 45 controls the two-sided adjustment components 5 to unfold, adjusting the round tube to be welded. The double cone block 410 moves away to the underside of the U-shaped frame 411, and the three sets of U-shaped frames 411 will move towards the center and retract into the positioning cylinder 49. However, after the adjustment components 5 are adjusted, the cylinder 47 pulls back the double cone block 410 to push out the three sets of U-shaped frames 411. The roller 413 will then be internally supported in the round tube to position it and prevent displacement during the welding process. In addition, the motor 6... 12 drives the connected synchronous pulley 613 and third gear 615 to rotate. The rotating third gear 615 drives the meshing second gear 63 and the circular sleeve 62 to rotate, driving the upper circular sleeve 62 and the arc welding gun 7 to rotate, so that the arc welding gun 7 can perform welding work. Before the work, the threaded fixed block 67 and the movable shaft 66 are driven to slide in the slide frame 65 by turning the threaded rod 68. The scissor fork connecting rod 69 raises the upper circular sleeve 62 and the arc welding gun 7, adjusting the distance between the two sets of circular sleeves 62 to adapt to the circular pipes of different specifications that need to be welded. At the same time, the rotating synchronous pulley 613 drives the synchronous belt 614 to drive the lower synchronous pulley 613 to rotate, so that the sliding control rod 42 rotates, thereby realizing the control of the two The side adjustment assembly 5 is driven and adjusted. Before the cylinder 47 is pushed, the distance between the movable block 57 and the adjustment shaft 58 is moved by turning the adjustment shaft 58 to match the length of the round tube to be welded. The control rod 42 and the connecting sleeve 45 drive the second bevel gear 513 to rotate, which causes the slide rod 510 to drive the threaded cylinder 59 to rotate, causing the movable blocks 57 on both sides to slide in the sliding sleeve 51, driving the adjustment shafts 58 on both sides to move closer or further apart to match the distance between different round tubes to be welded. In addition, when the connecting sleeve 45 drives the sliding sleeves 51 on both sides to move, the trapezoidal block 54 moves against the slide bar 55, keeping the sliding sleeve 51 in its state during the movement. The sliding sleeves 51 on both sides will push the round tube to move until the adjustment shaft 58 hits the outer shell of the heat exchanger tube body 3, aligning the required distance between each set of electric module slide table 2. The round tubes to be welded are kept consistent. When the cylinder 47 pulls back the double conical block 410, it supports the three sets of U-shaped frames 411, positioning the round tubes welded to the electric module slide frame 2. At the same time, it drives the connecting sleeve 45 and the two sets of sliding sleeves 51 to move back. The first gear 53 meshes with the rack 56, so that the other set of trapezoidal blocks 54 slides against the slide bar 55. The sliding sleeve 51 rotates ninety degrees, folding up the two sides of the sliding sleeve 51 to maintain the state. The slide rod 510 first contacts the push seat 511. When it rotates ninety degrees, it pulls the movable rod 512 through the universal joint 515 and squeezes the spring 514 through the second bevel gear 513, so that the second bevel gear 513 disengages from the first bevel gear 44, avoiding the need to readjust the distance between the two sides of the adjusting shaft 58 again when the motor 612 drives the control rod 42 to rotate.

[0030] The machine tool frame 1, electric module slide frame 2, heat exchanger tube body 3, cylinder 47, universal joint 515, scissor fork connecting rod 69, motor 612, and electric arc welding gun 7 in this invention are common knowledge in the field, and their working principles are well-known technologies. The appropriate model is selected according to actual use, so it will not be explained in detail.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pulse arc welding device for an automatic forming machine tool for shell-and-tube heat exchanger tube sheets, comprising a machine tool frame (1), characterized in that: An electric module slide table (2) is installed on the machine tool frame (1). A heat exchanger tube body (3) is placed on one side of the machine tool frame (1). A positioning component (4) is provided on the electric module slide table (2). Two sets of adjustment components (5) are provided on one side of the positioning component (4). An adjustment component (6) is provided on the other side of the positioning component (4). An arc welding gun (7) is provided on the upper side of the adjustment component (6). The positioning component (4) includes a hollow rod (41) fixedly installed at one end of the moving part of the electric module slide table (2). A control rod (42) is movably installed inside the hollow rod (41). Two sets of fixing rings (43) are fixedly installed on the outer side of the control rod (42) near the adjustment component (5). A first bevel gear (44) is fixedly installed on the outer side of the control rod (42) near the fixing rings (43). A connecting sleeve (45) is movably fitted between the outer side and the fixed ring (43). A Z-shaped piece (46) is fixedly installed on the upper end of the connecting sleeve (45). A cylinder (47) is fixedly installed on the upper end of the hollow rod (41). Sliding ports (48) are opened on the front and rear sides and the upper side of the hollow rod (41) respectively corresponding to the positions of the connecting sleeve (45) and the Z-shaped piece (46). A positioning cylinder (49) is fixedly installed at one end of the hollow rod (41). A double cone block (410) is fixedly installed at one end of the control rod (42) near the inside of the positioning cylinder (49). Three sets of U-shaped frames (411) are slidably installed on the inner side of the positioning cylinder (49). A wheel frame (412) is fixedly installed in the middle position of the U-shaped frame (411). Two sets of rollers (413) are rotatably installed on the upper side of the wheel frame (412). Limit strips (414) are slidably installed on both sides of the U-shaped frame (411).

2. The pulse arc welding device for an automatic tube sheet forming machine for shell-and-tube heat exchangers according to claim 1, characterized in that: The adjustment assembly (5) includes a sliding sleeve (51) movably disposed on the front side of the connecting sleeve (45). A round shaft (52) is fixedly disposed at the connection between the sliding sleeve (51) and the connecting sleeve (45). A first gear (53) is fixedly disposed at both the upper and lower ends of the round shaft (52). Two sets of trapezoidal blocks (54) are fixedly disposed on the outer side of the first gear (53). Slide bars (55) are fixedly disposed on both the upper and lower sides of the hollow rod (41) near the sliding port (48). A rack (56) is partially fixedly disposed on the slide bar (55). A movable block (57) is slidably disposed inside the sliding sleeve (51). An adjustment shaft (5) is threadedly connected to one side of the movable block (57). 8) The other side of the movable block (57) is internally threaded with a threaded cylinder (59). A slide rod (510) is slidably arranged inside the threaded cylinder (59). A push seat (511) is fixedly arranged on both the front and rear sides of the connecting sleeve (45) near the control rod (42). A movable rod (512) is movably arranged inside the push seat (511). A second bevel gear (513) is fixedly arranged at the rear end of the movable rod (512). A spring (514) is fixedly arranged between the push seat (511) and the second bevel gear (513) on the outer side of the movable rod (512). A universal joint (515) is fixedly installed between the movable rod (512) and the slide rod (510).

3. The pulse arc welding device for an automatic tube sheet forming machine for shell-and-tube heat exchangers according to claim 2, characterized in that: The adjusting assembly (6) includes two sets of limiting rings (61) fixedly disposed on the outside of the hollow rod (41). Two sets of circular sleeves (62) are provided on the outside and upper side of the hollow rod (41). A second gear (63) is fixedly disposed at one end of the lower set of the two sets of circular sleeves (62). A fixed shaft (64) is fixedly disposed at one end of each set of circular sleeves (62). A sliding frame (65) is fixedly disposed on one side of each set of fixed shafts (64). A movable shaft (66) is slidably disposed on the inner side of each set of sliding frames (65). A fixed block (67) is fixedly disposed on the lower set of each set of fixed shafts (64) and movable shafts (66). 7) Threaded rods (68) are movably provided on the inner side. Scissor rods (69) are connected between the two sets of fixed shafts (64) and movable shafts (66). A groove (610) is provided on the side of the hollow rod (41) near the round sleeve (62). A fixed sleeve (611) is fixedly provided on the inner wall of one side of the groove (610). A motor (612) is fixedly installed on the movable part of the electric module slide frame (2). Synchronous pulleys (613) are provided on the outer side of the rotating shaft of the motor (612) and the outer side of the fixed sleeve (611). Synchronous belts (614) are sleeved on the outer side of the two sets of synchronous pulleys (613). A third gear (615) is fixedly provided at one end of the rotating shaft of the motor (612).

4. The pulse arc welding device for an automatic tube sheet forming machine for shell-and-tube heat exchangers according to claim 1, characterized in that: The fixing ring (43) on the outside of the control rod (42) is adapted to the internal cavity of the hollow rod (41). The connecting sleeve (45) and the Z-shaped piece (46) pass through three sets of sliding ports (48) respectively. The telescopic rod of the cylinder (47) is fixedly connected to the Z-shaped piece (46). The upper set of the three sets of sliding ports (48) is shorter. The double cone block (410) is slidably set in the positioning cylinder (49). The square opening on the inner side of the U-shaped frame (411) corresponding to the limiting strip (414) is provided with a tensioning spring piece fixedly connected between the limiting strip (414) and the inner wall. The wheel frame (412) is made of elastic material. The limiting strip (414) is fixedly connected to the positioning cylinder (49).

5. The pulse arc welding device for an automatic tube sheet forming machine for shell-and-tube heat exchangers according to claim 2, characterized in that: The circular shaft (52) and the connecting sleeve (45) are rotatably arranged. The outer side of the first gear (53) is set with a partial tooth block. The two sets of trapezoidal blocks (54) are at ninety degrees. One set of the two sets of trapezoidal blocks (54) is fitted with the slide bar (55). The slide bar (55) has movable openings on both sides near the rack (56). The rack (56) is adapted to the tooth block on the first gear (53).

6. The pulse arc welding device for an automatic tube sheet forming machine for shell-and-tube heat exchangers according to claim 2, characterized in that: The second bevel gear (513) meshes with the first bevel gear (44), and the size of the connection port structure of the universal joint (515) is such that the sliding rod (510) rotates ninety degrees and contacts the push seat (511) to pull the position change of the movable rod (512).

7. The pulse arc welding device for an automatic tube sheet forming machine for shell-and-tube heat exchangers according to claim 3, characterized in that: The second gear (63) and the lower sleeve (62) are fitted on the outside of the hollow rod (41) near the two sets of limiting rings (61). The movable shaft (66) is engaged inside the slide frame (65). The fixing block (67) on the fixed shaft (64) is movably connected to the threaded rod (68). The fixing block (67) on the movable shaft (66) is threadedly connected to the threaded rod (68).

8. The pulse arc welding device for an automatic tube sheet forming machine for shell-and-tube heat exchangers according to claim 3, characterized in that: The scissor lift (69) is arranged in a cross configuration. The synchronous pulley (613) in the groove (610) is rotatably arranged with the fixed sleeve (611) and slidably connected with the control rod (42). The other set of the two sets of synchronous pulleys (613) is fixedly arranged with the rotating shaft of the motor (612). The third gear (615) is meshed with the second gear (63).

Images