Hollow liner laser welding device

Abstract

The application discloses a hollow liner laser welding device and belongs to the technical field of welding. The device comprises a welding machine box, which is internally provided with an installation cavity; a rotating positioning mechanism for rotating and clamping the liner, which is arranged in the welding machine box; and an oil removal and cleaning mechanism, which is arranged in the welding machine box and comprises a driving section, a spraying section connected to the driving section and a liquid supply section connected to the driving section. The oil removal and cleaning mechanism can stir the organic solvent in the organic solvent cylinder, prevent the organic solvent from being precipitated and stratified and entering the release assembly in different concentrations, uniformly send the organic solvent to the atomizing nozzle, participate in the dissolution work of the hollow liner and improve the dissolution efficiency of the oil stains on the hollow liner.

Description

Technical Field

[0001] This application relates to the field of welding technology, and in particular to a laser welding device for hollow inner liner. Background Technology

[0002] In existing technologies, if there are impurities such as oil or dust on the bevel of the hollow inner liner or the area of ​​the base material to be welded before welding, porosity and slag inclusions are easily generated during welding, affecting the welding operation of the hollow inner liner. Therefore, how to remove the oil stains on the bevel of the hollow inner liner has become an urgent technical problem to be solved.

[0003] Based on this, this application designs a laser welding device for hollow inner liner to solve the above problems. Summary of the Invention

[0004] To achieve the above objectives, this application provides the following technical solution:

[0005] A hollow inner liner laser welding device includes a welding housing, and the welding housing has an installation cavity inside the welding housing; A rotary positioning mechanism for rotating and clamping the inner liner, the rotary positioning mechanism is installed inside the welding machine housing; A pressure-applying mechanism is installed inside the installation cavity and is used to position the inner liner before welding. The degreasing and cleaning mechanism is installed inside the welding machine housing. The degreasing and cleaning mechanism consists of a drive section, a spray section connected to the drive section, and a liquid supply section connected to the drive section. When the drive section of the degreasing and cleaning mechanism is driven, it can drive the spray section to release organic solvents to the inner tank placed in the rotary positioning mechanism to dissolve and wipe the oil stains on the inner tank. The adjustment mechanism is located inside the welding machine housing and covers the degreasing and cleaning mechanism within it. The No. 1 welding mechanism is set on the adjustment mechanism. The No. 1 welding mechanism can perform multiple point welding on the joint between the inner and outer barrels after they have been spliced. The second welding mechanism is located on the adjustment mechanism and is capable of positioning and welding the inner liner splice seam after spot welding.

[0006] Preferably, the rotary positioning mechanism includes: The base has sliding plates at its ends that slide along the welding machine housing. Cylinder No. 1 is installed inside the welding machine housing, and the piston rod end of Cylinder No. 1 is connected to the base. Motor No. 1 is mounted on the base; The speed reducer is mounted on the base and is connected to the No. 1 motor via a gear belt. A turntable is installed at the output end of the reducer. Multiple sets of No. 2 cylinders are all set on the turntable, and the multiple sets of No. 2 cylinders are arranged in an array with respect to the center of the cross-section circle of the turntable. Limiting blocks are evenly distributed on each set of No. 2 cylinders. The retaining ring is placed on the turntable.

[0007] Preferably, the degreasing and cleaning mechanism includes a drive section comprising: The upright plate is arranged inside the welding machine housing, and a set of internal rings is arranged on the upright plate; Motor No. 2 is mounted on the upright plate. A drive assembly is connected to the output end of Motor No. 2, and the drive assembly passes through the built-in ring. The oil removal and cleaning mechanism includes a spray section comprising: The bottom wheel is inserted into the inner ring and is located below the drive assembly; Release component; release component inserts into the built-in ring. The wiping cotton board is connected to the bottom wheel; The degreasing and cleaning mechanism includes a liquid supply section comprising: An organic solvent cylinder is installed inside the welding machine housing. The organic solvent cylinder has pipelines that are connected to the release assembly. A one-way valve is installed on the pipelines. The extrusion assembly is arranged on the organic solvent cylinder, and the extrusion assembly and the drive assembly are interconnected.

[0008] Preferably, the driving component includes: The drive wheel has two sets of curved grooves and two sets of straight grooves, with the end of one set of curved grooves corresponding to the end of one set of straight grooves. The pressure block is located at the rear of the drive wheel; The vertical rod is mounted on the drive wheel and connected to the output end of motor number two. An annular protrusion is provided on the top of the bottom wheel, and the annular protrusion is located below the drive wheel. There is a groove inside the annular protrusion. In the initial position, the pressure block and the groove abut against each other. An extension rod is mounted on the annular protrusion, and the highest point of the extension rod is flush with the highest point of the annular protrusion.

[0009] Preferably, the release component includes: The outer cylinder is set inside the inner ring, and a release cylinder is arranged inside the outer cylinder; The piston rod has its top end abutting against the bottom of the bottom wheel. The piston rod is slidably arranged inside the release cylinder and has a bent tube at the bottom of the piston rod. A spring is fitted onto the piston rod, with its two ends abutting against the bottom of the inner wall of the release cylinder and the top stepped surface of the piston rod, respectively. The bend is located at the bottom of the release cylinder, and a spray gun is installed on the bend, with an atomizing nozzle on the spray gun.

[0010] Preferably, the extrusion assembly includes: The lid is set on the organic solvent container. A set of two-way pull rods is arranged on the lid. A side rod is provided at one end of the two-way pull rods, and a sliding rod is provided at the end of the side rod. A compression spring is located at one end of the double-acting tie rod, and the compression spring abuts against the side rod. An internal rod is connected to the other end of a bidirectional tie rod, and an agitator is installed at the bottom of the internal rod.

[0011] Preferably, the slide rod is inserted into the curved groove, and the diameter of the slide rod is adapted to the width of the curved groove and the straight groove.

[0012] Preferably, the adjustment mechanism includes: The No. 1 substrate is set on the welding machine chassis, and the No. 1 linear module is arranged on the No. 1 substrate. The second substrate is mounted on the welding machine chassis and has slide rails arranged on it. Ribs are slidably arranged on the slide rail and the output end of the first linear module. Linear module No. 2 is mounted on the rib plate.

[0013] Preferably, the first welding mechanism includes: Backplate No. 1 is fixedly installed on the output end of linear module No. 2. Linear module No. 3 is fixedly mounted on backplate No. 1. Welding gun number one is fixedly installed on the output end of linear module number three. The second welding mechanism includes: Backplate No. 2 is fixedly installed on the output end of linear module No. 2. Linear module No. 4 is fixedly mounted on backplate No. 2. Welding gun number two is fixedly mounted on the output end of linear module number four. Preferably, the pressure-applying mechanism includes: Cylinder No. 3 is fixedly installed inside the welding machine housing; The pressure rod has one end fixedly mounted on the telescopic end of cylinder number three, and the other end of the pressure rod is located directly above the center of the inner liner. The top of the upper pressure plate is coaxially rotatably connected to the other end of the pressure rod. Multiple pressure rods are fixedly installed on the circumference of the upper pressure plate, and the multiple pressure rods abut against the weld seam of the inner liner respectively. A sleeve, with an extension rod slidably provided on the inner side of the sleeve; The return spring has its top end fixedly mounted on the top of the inner wall of the sleeve, and its bottom end fixedly mounted on the top of the extension rod. The pressure plate is coaxially rotatable at the bottom end of the extension rod and is used to press against the center of the bottom wall of the inner liner.

[0014] In summary, this application has the following beneficial effects: 1. The oil removal and cleaning mechanism of this application can agitate the organic solvent in the organic solvent cylinder, which can prevent the organic solvent from precipitating and separating, thus preventing the organic solvent from entering the release component with different concentrations. It can evenly deliver the organic solvent to the atomizing nozzle to participate in the dissolution of the hollow inner liner and improve the dissolution efficiency of oil stains in the hollow inner liner. 2. This application, by pressing the piston rod downward during the overall downward movement of the bottom wheel, can drive the bent tube downward to squeeze out the organic solvent in the release cylinder, and spray the organic solvent onto the hollow inner liner through the atomizing nozzle. This can further increase the contact area between the organic solvent and the hollow inner liner, accelerate the dissolution efficiency of oil stains, and effectively avoid the problem of porosity and slag inclusion that are easily generated when welding the hollow inner liner due to oil stains. 3. During the downward movement of the bottom wheel in this application, it can simultaneously drive the extension rod downward, thereby wiping and absorbing the mixture of organic solvents and oil stains on the hollow inner liner, which can speed up the cleaning of oil stains. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this application; Figure 2 This is a schematic diagram showing the overall structure of this application from another perspective; Figure 3 This is a schematic diagram of the rotary positioning mechanism in this application; Figure 4 This is a schematic diagram of the structure when the adjustment mechanism, welding mechanism No. 1, and welding mechanism No. 2 are combined in this application. Figure 5 This is a schematic diagram of the oil removal and cleaning mechanism in this application; Figure 6 This is a schematic diagram from another perspective of the oil removal and cleaning mechanism in this application; Figure 7 This is a schematic diagram of the structure of the driving component in this application; Figure 8 This is a schematic diagram of the structure of the release component in this application; Figure 9 This is a schematic cross-sectional view of the structure of the release component in this application; Figure 10 This is a schematic diagram of the extrusion assembly in this application; Figure 11 For this application Figure 3 Enlarged view of the structure at point A in the middle; Figure 12 This is a schematic diagram of the pressure application mechanism in this application; Figure 13 This is a cross-sectional view of the weld seam of the hollow inner liner to be welded.

[0016] Explanation of reference numerals in the attached drawings: 1. Welding chassis; 2. Rotary positioning mechanism; 21. Base; 22. Slide plate; 23. Cylinder No. 1; 24. Motor No. 1; 25. Reducer; 26. Turntable; 27. Cylinder No. 2; 28. Limit block; 29. ​​Snap ring; 3. Oil removal and cleaning mechanism; 31. Vertical plate; 32. Internal ring; 33. Motor No. 2; 34. Drive assembly; 341. Drive wheel; 342. Curved groove; 343. Straight groove; 344. Vertical rod; 345. Pressure block; 35. Bottom wheel; 351. Ring protrusion; 352. Groove; 353. Extension rod; 36. Release assembly; 361. Outer cylinder; 362. Release cylinder; 363. Piston rod; 364. Spring; 365. Bend; 366. Spray gun; 367. Atomizing nozzle; 37. Wiping cotton plate; 38. Organic solvent cylinder; 381. 382. Piping; 39. One-way valve; 30. Extrusion assembly; 391. Bucket lid; 392. Two-way pull rod; 393. Compression spring; 394. Side rod; 395. Slide rod; 396. Internal rod; 397. Stirring plate; 398. Bracket; 4. Adjustment mechanism; 41. Base plate 1; 42. Base plate 2; 43. Linear module 1; 44. Slide rail; 45. Rib plate; 46. Linear module 2 5. Welding Mechanism No. 1; 51. Backplate No. 1; 52. Linear Module No. 3; 53. Welding Gun No. 1; 6. Welding Mechanism No. 2; 61. Backplate No. 2; 62. Linear Module No. 4; 63. Welding Gun No. 2; 7. Pressure Mechanism; 71. Cylinder No. 3; 72. Pressure Rod; 73. Upper Pressure Plate; 74. Pressure Rod; 75. Sleeve; 76. Return Spring; 77. Extension Rod; 78. Pressure Plate. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] Reference Figures 1-13This application provides a laser welding device for hollow inner liner, comprising: a welding housing 1, the welding housing 1 having an installation cavity; a rotary positioning mechanism 2 for rotating and clamping the inner liner, the rotary positioning mechanism 2 being disposed within the welding housing 1; and an oil removal and cleaning mechanism 3, the oil removal and cleaning mechanism 3 being disposed within the welding housing 1, the oil removal and cleaning mechanism 3 comprising a drive section, a spray section connected to the drive section, and a liquid supply section connected to the drive section, wherein when the drive section of the oil removal and cleaning mechanism 3 is driven, it can drive the spray section to be positioned against the rotary positioning mechanism. The inner liner in structure 2 releases organic solvents to dissolve and wipe away oil stains on the inner liner; the adjustment mechanism 4 is set inside the welding machine box 1, and the oil removal and cleaning mechanism 3 is covered therein; the first welding mechanism 5 is set on the adjustment mechanism 4, and the first welding mechanism 5 can perform multiple spot welding on the butt joint of the inner and outer barrels after splicing; the second welding mechanism 6 is set on the adjustment mechanism 4, and the second welding mechanism 6 can perform positioning welding on the spliced ​​joint of the inner liner after spot welding.

[0019] Furthermore, the rotary positioning mechanism 2 includes: a base 21, with a sliding plate 22 fixed to the end of the base 21; a laterally extending slide rail (not labeled in the figure) fixed to the inner bottom wall of the welding machine housing 1; a slider adapted to the slide rail fixed to the bottom of the sliding plate 22; the slider slidingly engaging with the slide rail to achieve lateral sliding of the base 21 along the welding machine housing 1; a first cylinder 23 fixed inside the welding machine housing 1, with the piston rod end of the first cylinder 23 fixedly connected to the base 21 via a flange; a first motor 24 fixed to the base 21 by bolts; and a reducer 25 fixed to the base 21 by bolts, with the input shaft of the reducer 25 connected to the input shaft of the first motor 24 via a gear belt. The output shaft is connected to the drive; the turntable 26 is coaxially fixed on the output shaft of the reducer 25; multiple sets of second cylinders 27 are fixedly mounted on the turntable 26, and the multiple sets of second cylinders 27 are arranged in a circular array on the upper surface of the turntable 26. The piston rod end of each set of second cylinders 27 is fixed with a limit block 28 by bolts. The limit block 28 is an arc-shaped rubber block, and its arc surface is adapted to the arc of the outer wall of the hollow inner liner outer barrel to increase the contact friction force; the retaining ring 29 is an annular steel plate, which is fixed to the turntable 26 by welding. The inner diameter of the retaining ring 29 is adapted to the outer diameter of the hollow inner liner outer barrel, so that the inner barrel can be placed on the retaining ring 29 after being inserted into the outer barrel, and the retaining ring 29 bears the weight of the inner liner.

[0020] It should be noted that, referring to Figure 13 In the diagram, a is the outer tub, b is the inner tub, and c is the weld seam. Before welding, the inner tub b is inserted into the outer tub a and positioned by the pre-reserved step surface at the top. Then, spot welding is performed for pre-positioning, and then full welding is performed to complete the welding. In use, place the fitted hollow inner liner on the retaining ring 29, open multiple sets of second cylinders 27, the piston rod extends to push the limiting block 28 against the outer wall of the outer barrel, and realize the circumferential positioning of the inner liner; open the first cylinder 23, the piston rod extends to push the base 21 along the slide rail to move towards the oil removal and cleaning mechanism 3, so that the inner liner enters the oil removal and cleaning station.

[0021] Furthermore, a pressure applying mechanism 7 is installed inside the installation cavity and is used to position the inner liner before welding. The pressure applying mechanism 7 includes a third cylinder 71, a pressure rod 72, an upper pressure plate 73, a sleeve 75, a return spring 76, and a pressure plate 78. The third cylinder 71 is fixedly installed inside the welding machine housing 1; one end of the pressure rod 72 is fixedly installed on the telescopic end of the third cylinder 71, and the other end of the pressure rod 72 is located directly above the center of the inner liner; the top of the upper pressure plate 73 is coaxially rotated and fixed. Attached to the other end of the pressure rod 72, multiple pressure rods 74 are fixedly installed on the circumferential side of the upper pressure plate 73, and the multiple pressure rods 74 respectively abut against the weld seam of the inner liner; an extension rod 77 is slidably installed on the inner side of the sleeve 75; the top end of the return spring 76 is fixedly installed on the top of the inner wall of the sleeve 75, and the bottom end of the return spring 76 is fixedly installed on the top end of the extension rod 77; the pressure plate 78 is coaxially rotatably installed at the bottom end of the extension rod 77, and the pressure plate 78 is used to press against the center position of the bottom wall of the inner liner; It should be noted that the pressure rod 74 is L-shaped. When the inner and outer tubs are placed inside the retaining ring 29, the positioning mechanism 2 moves the inner liner to the welding station. Then, the third cylinder 71 is activated, and the extension end of the third cylinder 71 drives the pressure rod 72 to move downward, so that the bottom of the pressure plate 78 abuts against the bottom of the inner wall of the inner tub. At the same time, the return spring 76 is compressed, and the extension rod 77 retracts into the sleeve 75. During this process, the upper pressure plate 73 can drive the long sides of multiple pressure rods 74 to abut against the air... On the outward-bending flange at the top of the inner tub of the hollow inner tub, the short side of the pressure rod 74 abuts against the outer side of the flange of the hollow inner tub to position the inner tub for subsequent spot welding. After spot welding is completed, cylinder 71 controls the pressure rod 72 to move upward, so that the pressure rod 74 disengages from the hollow inner tub. At this time, the sleeve 75 moves upward relative to the extension rod 77, and the return spring 76 has a tendency to return to its original position. At this time, the pressure plate 78 can still press down on the hollow inner tub to ensure the stability of the hollow inner tub during subsequent full welding. In another preferred example, the short side of the pressure bar 74 facing the bottom of the side wall of the hollow inner tub is set as an inclined surface that slopes outward from top to bottom. The inclined surface can facilitate the circumferential limiting of the inner tub during the synchronous pressing of multiple pressure bars 74.

[0022] Furthermore, the degreasing and cleaning mechanism 3 has a drive section including: a vertical plate 31, which is bolted to the welded housing 1, and a set of built-in rings 32 are welded onto the vertical plate 31. The built-in rings 32 are vertically arranged circular ring structures. A second motor 33 is bolted to the top of the back of the vertical plate 31. A drive assembly 34 is connected to the output end of the second motor 33, and the drive assembly 34 passes through the built-in rings 32. The drive assembly 34 includes a drive wheel 341, a vertical rod 344, and a pressure block 345. One end of the vertical rod 344 is connected to the second motor 341. The output shaft of 3 is fixedly connected, and the other end of the vertical rod 344 is welded and fixed to the center of the drive wheel 341. The drive wheel 341 has two sets of symmetrical curved grooves 342 and two sets of symmetrical straight grooves 343. The end of one set of curved grooves 342 is connected to the end of the corresponding set of straight grooves 343. The curved grooves 342 are downwardly recessed arc-shaped grooves, and the straight grooves 343 are vertical straight grooves. The pressure block 345 is a rectangular metal block with rounded bottom corners. The pressure block 345 is welded and fixed to the tail of the drive wheel 341. In the initial position, the pressure block 345 is vertically downward. The spraying section of the oil removal and cleaning mechanism 3 includes: a bottom wheel 35, which is inserted into the inner ring 32 and slides against the inner wall of the inner ring 32, and the bottom wheel 35 is located directly below the drive wheel 341; the top of the bottom wheel 35 is integrally formed with an annular protrusion 351, which is located below the drive wheel 341, and a groove 352 is formed in the annular protrusion 351. In the initial position, the pressure block 345 is embedded in the groove 352 and abuts against the bottom wall of the groove 352; the extension rod 353 is a metal rod, which is welded and fixed to the annular protrusion 351, and the highest point of the extension rod 353 is flush with the highest point of the annular protrusion 351; and the release component 36 is inserted into the inner ring 32 and is located directly below the bottom wheel 35. The wiping cotton board 37 is a ring-shaped sponge board, which is fixed to the bottom wheel 35 by the extension rod 353. The inner diameter of the wiping cotton board 37 is matched with the diameter of the inner liner and the outer barrel. Its function is to wipe the mixture of oil and organic solvent at the welding point of the inner liner on the one hand, and to remove residual oil stains through the absorbency of the sponge on the other hand. At the same time, the friction of the sponge improves the oil stain dissolution efficiency.

[0023] The oil removal and cleaning mechanism 3 includes an organic solvent cylinder 38, which is bolted to the welding housing 1 and contains an oil removal organic solvent. The top of the organic solvent cylinder 38 is fixed with a pipe 381 via a flange. The other end of the pipe 381 is connected to the inlet of the release assembly 36 via a clamp. A one-way valve 382 is installed on the pipe 381, which only allows the organic solvent to flow from the organic solvent cylinder 38 to the release assembly 36. The squeezing assembly 39 is installed on the organic solvent cylinder 38 and is linked with the drive assembly 34. The release assembly 36 includes: an outer cylinder 361, which is welded and fixed to the bottom of the inner ring 32; a release cylinder 362 is coaxially arranged inside the outer cylinder 361; the release cylinder 362 is a cylindrical body; a piston rod 363 slides through the release cylinder 362; a contact block is integrally formed on the top of the piston rod 363; the top of the contact block abuts against the bottom of the bottom wheel 35; and a spring 364 is sleeved on the piston rod 363, with both ends of the spring 364 abutting against the top of the release cylinder 362 and the contact block, respectively. It should be noted that a rubber piston (not labeled in the figure) is fixedly installed at the bottom end of the piston rod 363. When the piston rod 363 moves downward, it can squeeze the organic solvent inside the release cylinder 362 downward and let it enter the curved tube 365. Furthermore, it also includes a bend 365, which is integrally formed and connected to the bottom of the release cylinder 362. The end of the bend 365 is fixed with a spray gun 366 by a clamp. An atomizing nozzle 367 is installed at the outlet end of the spray gun 366. The spray nozzle 367 is facing the inner liner to be welded. The atomizing nozzle 367 is an existing mature atomizing component that can atomize organic solvents and spray them to the area to be welded. The extrusion assembly 39 includes: a barrel lid 391 and a bracket 398 fixed on the barrel lid 391. The barrel lid 391 is sealed and fixed to the top of the organic solvent cylinder 38 by bolts. The bidirectional pull rod 392 is a U-shaped metal rod. The bidirectional pull rod 392 is slidably connected to the bracket 398 and the barrel lid 391. A side rod 394 is welded and fixed to one end of the bidirectional pull rod 392. A sliding rod 395 is welded and fixed to the end of the side rod 394. The diameter of the sliding rod 395 is adapted to the groove width of the curved groove 342 and the straight groove 343. The sliding rod 395 passes into the curved groove 342. A compression spring 393 is sleeved on one end of a bidirectional pull rod 392. One end of the compression spring 393 abuts against a bracket 398, and the other end abuts against the end step surface of a side rod 394. An internal rod 396 is welded and fixed to the other end of the bidirectional pull rod 392. The internal rod 396 passes through an organic solvent cylinder 38. An agitator plate 397 is welded and fixed to the bottom of the internal rod 396. The agitator plate 397 is a circular metal plate with multiple flow holes to improve the agitation effect. It should be noted that by turning on the second motor 33, the vertical rod 344 and the drive wheel 341 can be rotated. In the initial state, the slide rod 395 is located in the straight groove 343. Therefore, the slide rod 395 moves along the straight groove 343 towards the curved groove 342, which can drive the slide rod 395 to rise longitudinally. At the same time, it can lift the built-in rod 396 and the stirring plate 397 upward, which can stir the organic solvent in the organic solvent cylinder 38. This can prevent the organic solvent from precipitating and separating, which would cause the organic solvent to enter the release component 36 with different concentrations. It can evenly deliver the organic solvent to the atomizing nozzle 367 to participate in the dissolution of the hollow inner liner, improving the dissolution efficiency of oil stains in the hollow inner liner. During the rotation of the drive wheel 341, it can also actuate the pressure block 345 to rotate, causing the pressure block 345 to move along the groove 352. When the pressure block 345 moves along the groove 352 toward the top of the annular protrusion 351, it can drive the bottom wheel 35 to move downward as a whole. During the downward movement of the bottom wheel 35, it can squeeze the piston rod 363 to move downward, and drive the bent tube 365 to move downward, so as to squeeze out the organic solvent in the release cylinder 362. After being atomized by the atomizing nozzle 367, the organic solvent is sprayed onto the hollow inner liner, which can further increase the contact area between the organic solvent and the hollow inner liner, accelerate the dissolution efficiency of oil stains, and effectively avoid the problem of easy porosity and slag inclusion during welding of the hollow inner liner due to oil stains. It should be noted that when the No. 2 motor 33 rotates forward, it drives the drive wheel 341 to rotate synchronously. The slide rod 395 first enters the curved groove 342 along the bottom of the straight groove 343, which causes the slide rod 395 to move upward in the vertical direction. Through the side rod 394, it drives the bidirectional pull rod 392 to move upward, which in turn pulls the built-in rod 396 and the stirring plate 397 to move upward, stirring the organic solvent in the organic solvent cylinder 38 to prevent precipitation and stratification. As the drive wheel 341 rotates, it drives the pressure block 345 to slide out of the groove 352 and roll along the top of the annular protrusion 351, pushing the bottom wheel 35 to move down along the inner ring 32. When the bottom wheel 35 moves down, it first squeezes the contact block of the piston rod 363, compresses the spring 364, and pushes the piston rod 363 down, so that the organic solvent in the release cylinder 362 is sprayed out from the atomizing nozzle 367 through the bent pipe 365 and the spray gun 366. The atomized organic solvent is evenly sprayed on the area to be welded in the inner liner. When the bottom wheel 35 moves down, the extension rod 353 moves down synchronously, and the wiping cotton plate 37 at its end contacts the area to be welded in the inner liner. As the inner liner is rotated by the rotating positioning mechanism 2, the wiping cotton plate 37 wipes and absorbs the organic solvent that has dissolved the oil.

[0024] When motor 33 reverses, drive wheel 341 rotates in the opposite direction, pressure block 345 re-embeds into groove 352, bottom wheel 35 moves upward and resets under the reset force of spring 364, slide rod 395 returns to straight groove 343 along curved groove 342, side rod 394 moves downward under the reset force of compression spring 393, drives stirring plate 397 downward through bidirectional pull rod 392 and built-in rod 36, further agitating the organic solvent, and at the same time the elastic force of compression spring 393 can increase the downward speed of stirring plate 397, enhancing the agitation effect; When the release cylinder 362 draws in the organic solvent in the organic solvent cylinder 38, it can accelerate the flow of the organic solvent in the organic solvent cylinder 38, which can effectively prevent the organic solvent from precipitating and stratifying, and promote the stirring operation of the extrusion component 39.

[0025] It should be further explained that the wiping cotton plate 37 is made of porous sponge material, which can be quickly replaced after it becomes saturated. During the wiping process, it only removes the mixed liquid from the area to be welded and will not form water accumulation on the turntable 26. The device is equipped with a hot air drying component (not shown in the figure, which is a mature existing hot air gun structure) next to the degreasing station. After the inner liner is degreased, the first cylinder 23 drives the base 21 to return to the initial position, and the hot air drying component is turned on to quickly dry the area to be welded in the inner liner. There is no need for natural air drying, avoiding process waiting and improving welding efficiency.

[0026] Furthermore, the adjustment mechanism 4 includes: a first base plate 41, which is bolted to the rear top of the welding machine housing 1, and a first linear module 43, which is an existing mature ball screw linear module, is bolted to the first base plate 41; a second base plate 42, which is bolted to the front top of the welding machine housing 1, and a laterally extending slide rail 44 is bolted to the second base plate 42; one side of the bottom of the rib plate 45 is slidably connected to the slide rail 44 via a slider, and the other side is fixedly connected to the slider of the first linear module 43 via a connecting block; and a second linear module 46, which is bolted to the front side wall of the rib plate 45, is also an existing mature ball screw linear module. Opening the first linear module 43 can drive the rib plate 45 to move laterally along the slide rail 44, and opening the second linear module 46 can drive the welding mechanism on it to move longitudinally, thereby realizing the planar position adjustment of the welding mechanism.

[0027] Furthermore, the first welding mechanism 5 includes: a first back plate 51, which is fixedly mounted on the slider of the second linear module 46 by bolts; a third linear module 52, which is fixedly mounted on the first back plate 51 by bolts, and the third linear module 52 is an existing mature ball screw linear module; and a first welding gun 53, which is fixedly mounted on the slider of the third linear module 52 by a mounting bracket, wherein the first welding gun 53 is the welding gun of a resistance spot welding equipment. It should be noted that turning on the No. 3 linear module 52 can move the No. 1 welding gun 53 up and down to the butt joint position. Turning on the No. 1 welding gun 53 at the same time turns on the No. 1 motor 24 to drive the inner liner to rotate. The No. 1 welding gun 53 performs spot welding at intervals along the butt joint to complete the pre-welding positioning.

[0028] Furthermore, the second welding mechanism 6 includes: a second back plate 61, which is fixedly mounted on the slider of the second linear module 46 by bolts; a fourth linear module 62, which is fixedly mounted on the second back plate 61 by bolts, and the fourth linear module 62 is an existing mature ball screw linear module; and a second welding torch 63, which is fixedly mounted on the slider of the fourth linear module 62 by a mounting bracket.

[0029] It should be noted that after the pre-welding is completed, the first linear module 43 moves the rib plate 45, moves the first welding mechanism 5 out of the welding station, moves the second welding mechanism 6 to the welding station, and activates the fourth linear module 62 to move the second welding gun 63 up and down to the joint position. The second welding gun 63 is activated, and at the same time, the first motor 24 is activated to drive the inner liner to rotate. The second welding gun 63 performs continuous welding along the joint to complete the final fixation.

[0030] The No. 1 welding mechanism 5 and the No. 2 welding mechanism 6 in this scheme have basically the same structure. The difference is that the No. 1 welding gun 53 is the welding gun of the resistance spot welding equipment, and the No. 2 welding gun 63 is the welding gun of the automatic argon arc welding machine or the laser welding machine, which are used for spot welding and continuous welding respectively.

[0031] In this embodiment, the working principle is as follows: First, after inserting the inner tub into the outer tub, place it on the retaining ring 29. Align the edges of the inner and outer tubs to form a weld seam c, which is located on the side. Activate multiple sets of second-stage cylinders 27 to push the limiting block 28 against the outer wall of the outer tub to complete the positioning. Activate first-stage cylinder 23 to move the base 21 to the degreasing station. Activate second-stage motor 33 to rotate forward, driving the drive wheel 341 to rotate. The slide rod 395 moves upward along the curved groove 342, and is driven by the side rod 394, the bidirectional pull rod 392, and the internal rod 396. The stirring plate 397 moves upward to stir the organic solvent; the pressure block 345 slides out of the groove 352, pushing the bottom wheel 35 downward, squeezing the piston rod 363, and the organic solvent is sprayed from the atomizing nozzle 367 to the weld seam c; during the downward movement of the bottom wheel 35, the wiping cotton plate 37 contacts the weld seam c of the inner liner, at which time the first motor 24 controls the inner liner to rotate, and the wiping cotton plate 37 dynamically wipes and absorbs the oil and grease mixture; after the degreasing is completed, all parts are reset, the second motor 33 reverses, and the first cylinder 23... The base 21 is retracted, the hot air drying assembly is activated to dry the inner liner, and the inner liner is moved directly below the pressure plate 78. Then, the extension end of cylinder 71 is shortened, so that the bottom of the pressure plate 78 can press against the center of the bottom wall inside the inner barrel. Linear module 43 and linear module 46 are activated to adjust the position of welding mechanism 5. Linear module 52 is activated to adjust the height of welding torch 53. Welding torch 53 is activated to rotate the inner liner. After the spot welding is completed, the pressure rod 72 is moved upward by the cylinder 71, so that the pressure rod 74 is disengaged from the hollow inner liner. At this time, the sleeve 75 moves upward relative to the extension rod 77, and the return spring 76 tends to return to its original position. At this time, the pressure plate 78 can still press down on the hollow inner liner. Then, the welding mechanism 6 is moved to the welding station, the linear module 62 is turned on to adjust the height of the welding gun 63, and the welding gun 63 is turned on to complete the full welding with the rotation of the inner liner.

[0032] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of this invention.

Claims

1. A laser welding device for hollow inner liner, characterized in that, include: The welding machine housing (1) has an installation cavity inside; A rotary positioning mechanism (2) for rotating and clamping the inner liner is provided inside the welding machine housing (1); The pressure applying mechanism (7) is installed in the installation cavity and is used to position the inner liner before welding. The degreasing and cleaning mechanism (3) is installed inside the welding machine box (1). The degreasing and cleaning mechanism (3) consists of a drive section, a spray section connected to the drive section, and a liquid supply section connected to the drive section. When the drive section of the degreasing and cleaning mechanism (3) is driven, it can drive the spray section to release organic solvent to the inner liner placed in the rotary positioning mechanism (2) to dissolve and wipe the oil stains on the inner liner, so that the solvent agitation, atomization spraying and wiping absorption are carried out simultaneously. Adjustment mechanism (4) is set inside welding machine box (1) and covers the degreasing and cleaning mechanism (3) inside it; The No. 1 welding mechanism (5) is set on the adjustment mechanism (4). The No. 1 welding mechanism (5) can perform multiple point welding on the joint of the inner and outer barrels after splicing. The second welding mechanism (6) is set on the adjustment mechanism (4). The second welding mechanism (6) can perform positioning welding on the inner liner splice seam after spot welding.

2. The hollow inner liner laser welding device according to claim 1, characterized in that, The rotary positioning mechanism (2) includes: The base (21) has a sliding plate (22) at its end that slides along the welding housing (1). Cylinder No. 1 (23) is installed inside the welding machine box (1), and the piston rod end of cylinder No. 1 (23) is connected to the base (21); Motor No. 1 (24) is mounted on base (21); The reducer (25) is mounted on the base (21) and is connected to the No. 1 motor (24) via a gear belt; Turntable (26) is located on the output end of reducer (25); Multiple sets of No. 2 cylinders (27) are all set on the turntable (26), and the multiple sets of No. 2 cylinders (27) are arranged in an array about the center of the cross-section circle of the turntable (26). Limiting blocks (28) are evenly distributed on each set of No. 2 cylinders (27). A retaining ring (29) is arranged on a turntable (26).

3. The hollow inner liner laser welding device according to claim 1, characterized in that, The degreasing and cleaning mechanism (3) has a drive section including: The upright plate (31) is arranged inside the welding machine box (1), and a set of internal rings (32) are arranged on the upright plate (31). The second motor (33) is arranged on the upright plate (31). A drive assembly (34) is connected to the output end of the second motor (33), and the drive assembly (34) passes through the inner ring (32). The oil removal and cleaning mechanism (3) has a spray section including: Bottom wheel (35) is inserted into the inner ring (32) and is located below the drive assembly (34); Release component (36) is inserted into the inner ring (32); Wiping cotton board (37) is connected to the bottom wheel (35); The oil removal and cleaning mechanism (3) has a liquid supply section including: Organic solvent cylinder (38) is installed inside welding machine housing (1). The organic solvent cylinder (38) has a pipeline (381) and the pipeline (381) is connected to the release assembly (36). A one-way valve (382) is arranged on the pipeline (381). The extrusion assembly (39) is disposed on the organic solvent cylinder (38), and the extrusion assembly (39) and the drive assembly (34) are interconnected.

4. The hollow inner liner laser welding device according to claim 3, characterized in that, The driving component (34) includes: The drive wheel (341) has two sets of curved grooves (342) and two sets of straight grooves (343), and the end of one set of curved grooves (342) corresponds to the end of one set of straight grooves (343). A pressure block (345) is provided at the tail of the drive wheel (341); The vertical rod (344) is mounted on the drive wheel (341) and is connected to the output end of the second motor (33); An annular protrusion (351) is provided on the top of the bottom wheel (35), and the annular protrusion (351) is located below the drive wheel (341). There is a groove (352) in the annular protrusion (351). In the initial position, the pressure block (345) and the groove (352) abut against each other. An extension rod (353) is provided on the annular protrusion (351), and the highest point of the extension rod (353) is flush with the highest point of the annular protrusion (351).

5. The hollow inner liner laser welding device according to claim 4, characterized in that, The release component (36) includes: The outer cylinder (361) is set inside the inner ring (32), and the release cylinder (362) is arranged inside the outer cylinder (361). The piston rod (363) has its top end abutting against the bottom of the bottom wheel (35). The piston rod (363) is slidably arranged in the release cylinder (362). The bottom of the piston rod (363) has a bent tube (365). Spring (364) is sleeved on piston rod (363), and the two ends of spring (364) abut against release cylinder (362) and piston rod (363) respectively; A bend (365) is set at the bottom of the release cylinder (362). A spray gun (366) is arranged on the bend (365), and an atomizing nozzle (367) is arranged on the spray gun (366).

6. The hollow inner liner laser welding device according to claim 5, characterized in that, The extrusion assembly (39) includes: The barrel lid (391) and the bracket (398) are provided. The barrel lid (391) is set on the organic solvent cylinder (38). A set of bidirectional pull rods (392) is arranged on the bracket (398). A side rod (394) is arranged at one end of the bidirectional pull rod (392). A sliding rod (395) is arranged at the end of the side rod (394). Compression spring (393) is set at one end of the double-acting tie rod (392), and the two ends of the compression spring (393) abut against the bracket (398) and the side rod (394) respectively; An internal rod (396) is connected to the other end of a bidirectional tie rod (392), and an agitator plate (397) is provided at the bottom of the internal rod (396).

7. The hollow inner liner laser welding device according to claim 6, characterized in that, The slide rod (395) is inserted into the curved groove (342), and the diameter of the slide rod (395) is adapted to the groove width of the curved groove (342) and the straight groove (343).

8. The hollow inner liner laser welding device according to claim 1, characterized in that, The adjustment mechanism (4) includes: The first substrate (41) is mounted on the welding machine housing (1), and a first linear module (43) is arranged on the first substrate (41). The second substrate (42) is mounted on the welding machine housing (1), and a slide rail (44) is arranged on the second substrate (42). Rib plate (45) is slidably arranged on slide rail (44) and output end of linear module (43); Linear module 2 (46) is mounted on rib plate (45).

9. The hollow inner liner laser welding device according to claim 1, characterized in that, The first welding mechanism (5) includes: Backplate 1 (51) is fixedly mounted on the output end of linear module 2 (46); Linear module No. 3 (52) is fixedly mounted on back plate No. 1 (51); Welding gun No. 1 (53) is fixedly installed on the output end of linear module No. 3 (52); The second welding mechanism (6) includes: Backplate 2 (61) is fixedly mounted on the output end of linear module 2 (46); Linear module No. 4 (62) is fixedly mounted on back plate No. 2 (61); Welding gun No. 2 (63) is fixedly installed on the output end of linear module No. 4 (62).

10. The hollow inner liner laser welding device according to claim 1, characterized in that, The pressure-applying mechanism (7) includes: Cylinder No. 3 (71) is fixedly installed inside the welding machine box (1); The pressure rod (72) has one end fixedly mounted on the telescopic end of the No. 3 cylinder (71), and the other end of the pressure rod (72) is located directly above the center of the inner liner. The top of the upper pressure plate (73) is coaxially rotatably connected to the other end of the pressure rod (72). Multiple pressure rods (74) are fixedly arranged on the circumferential side of the upper pressure plate (73), and the multiple pressure rods (74) abut against the weld seam of the inner liner respectively. A sleeve (75) has an extension rod (77) slidably provided on the inner side of the sleeve (75); The top end of the return spring (76) is fixedly set on the top of the inner wall of the sleeve (75), and the bottom end of the return spring (76) is fixedly set on the top end of the extension rod (77). The pressure plate (78) is coaxially rotatably mounted at the bottom end of the extension rod (77) and is used to press against the center of the bottom wall of the inner liner.

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