Welding device for aluminum casting automobile engine pipe fitting

Abstract

The invention discloses a welding device for aluminum casting automobile engine pipe fittings, and belongs to the technical field of engine pipe fitting machining devices. A base is included; the sliding seat is arranged on the base in a sliding manner; the fixed table is fixedly mounted on the sliding seat; the annular shell is fixedly arranged on the fixed table; the rotating ring is rotationally arranged on the inner side of the annular shell; the adjusting cylinder is fixed on the rotating ring; the mounting plate is fixedly arranged at one end of a piston rod of the adjusting cylinder; the welding gun is fixedly mounted on the mounting plate; the driving motor is fixedly arranged on the fixed table; the telescopic shaft is fixed at the power output end of the driving motor; the driving wheel is fixedly arranged on the telescopic shaft; and the protection assembly is used for providing protection gas for the inner wall of the pipeline. The welding device for the aluminum casting automobile engine pipe fitting has the beneficial effects that the protection gas tank and the gas conveying pipe are arranged, so that protection gas can be introduced into the cavity groove, and a welding part is protected.

Description

Technical Field

[0001] The present application relates to the technical field of engine pipe processing devices, and in particular to a welding device for aluminum cast automobile engine pipes. Background Art

[0002] In automobile engine manufacturing, girth welding of various metal pipes, such as cooling pipes and intake pipes, is a key process link to ensure their sealing and structural strength. Traditional girth welding devices mostly use external clamping tooling, which clamps the pipes through mechanisms such as chucks and pneumatic clamps, drives the workpiece to rotate around the axis, and cooperates with fixed welding guns or mobile welding guns to complete the welding of girth welds. However, with the advancement of the lightweight trend of automobiles, the wall thickness of pipes has generally decreased. The high temperature generated at the welding position will cause the temperature at the welding part of the pipe to be higher. Heat accumulates at the welding position, resulting in a decrease in material strength and easy generation of residual stress. At the same time, in order to avoid oxidation of the weld pool at the welding position during the welding process, it is usually necessary to add shielding gas for welding. In the existing technology, the welding head is provided with a shielding gas outlet to spray the shielding gas to the welding position. However, since the welding gun is on the outer wall of the pipe, it can only protect the welding position of the outer wall of the pipe, while the inner wall of the pipe cannot be protected, resulting in welding defects on the inner wall of the pipe.

[0003] Therefore, a welding device for aluminum casting automobile engine pipe fittings is needed to solve the above problems. Summary of the Invention

[0004] The content of this application is used to briefly introduce concepts that will be described in detail in the detailed description section below. The content of this application is not intended to identify key features or essential features of the technical solution for which protection is sought, nor is it intended to limit the scope of the technical solution for which protection is sought.

[0005] In order to solve the technical problems mentioned in the above background technology section, some embodiments of the present application provide a welding device for aluminum cast automobile engine pipe fittings, including: a base; a sliding seat, slidably set on the base; a fixed platform, fixedly installed on the sliding seat; an annular shell, fixedly set on the fixed platform; a rotating ring, rotatably set on the inner side of the annular shell; an adjusting cylinder, fixed on the rotating ring; a mounting plate, fixedly set on one end of the piston rod of the adjusting cylinder; a welding gun, fixedly mounted on the mounting plate; a driving motor, fixedly set on the fixed platform; a telescopic shaft, fixed on the power output end of the driving motor, the telescopic shaft passes through the fixed platform; a driving wheel, fixedly set on the telescopic shaft, and the outer periphery of the rotating ring is provided with teeth that engage with the driving wheel; two pipe clamping blocks are also slidably set on the base, and three groups of evenly distributed clamping blocks are provided on the pipe clamping blocks, and a driving member for driving the pipe clamping blocks is provided on the pipe clamping blocks, and the pipe fittings are clamped by the three groups of clamping blocks so that the pipe fittings are coaxial with the annular shell.

[0006] The annular shell and the rotating ring can drive the welding gun to rotate around the pipe fitting, thereby achieving circumferential welding of the pipe fitting and avoiding the need to frequently move the pipe fitting.

[0007] Furthermore, the protection component includes: a control block fixedly arranged on the base, a control cylinder fixedly connected to the control block, one end of the piston rod of the control cylinder fixedly connected to a connecting block coaxially arranged with the annular shell, the connecting block extends into the pipe fitting, two groups of annular groove frames are fixedly connected to the connecting block, annular bags are connected to the outer edges of the annular groove frames, an air pump is fixedly installed on the tube clamping block, a telescopic air pipe is connected between the two groups of annular groove frames and connected through the telescopic air pipe, the air outlet end of the air pump is connected to the telescopic air pipe, and the two groups of annular groove frames are inflated by the air pump, so that the annular bag expands and abuts against the inner wall of the pipe fitting.

[0008] By setting up a connecting block and two sets of annular groove frames, when the connecting block extends into the pipe fitting, air is inflated through the two annular groove frames, and the weld is located between the two sets of annular groove frames, thereby forming a cavity groove between the two annular groove frames. Shielding gas can be introduced into the cavity groove to provide protection for the welding part inside the pipe fitting.

[0009] Furthermore, a cavity groove is formed between the two annular groove frames, and a protective gas box and a preheating gas box are fixedly arranged in the connecting block. The protective gas box is provided with a plurality of protective gas pipes distributed circumferentially, one end of the protective gas pipe passes into the cavity groove and forms an opening on the inner wall of the cavity groove. The preheating gas box is provided with a plurality of preheating gas pipes distributed circumferentially, one end of the preheating gas pipe passes into the cavity groove, the number of the protective gas pipes is the same as that of the preheating gas pipes, and the protective gas pipes and the preheating gas pipes are arranged front and back along the axis of the connecting block. The protective gas box is connected to a recovery pipe, and the recovery pipe is connected to a recovery air bag. A heat exchange block is arranged between the protective gas box and the preheating gas box to ensure sufficient heat exchange between the protective gas box and the preheating gas box.

[0010] The shielding gas box and preheating gas box are installed. When the shielding gas pipe on the shielding gas box recycles the shielding gas, the recycled shielding gas is at a higher temperature. At this time, the heat exchange block can heat the air in the preheating gas box. Then, the heated gas is passed through the preheating gas pipe to the unwelded area of the annular seam, preheating the area to be welded and ensuring the welding effect. The recovery pipe and recovery air bag can recycle the shielding gas, reducing resource loss.

[0011] Furthermore, a plurality of partition members are slidingly provided on the connecting block, one end of which is located in the cavity groove, and a groove for inserting the partition members is opened on the inner wall of the cavity groove. The partition members separate the openings of the protective air pipes and the openings of the preheating air pipes arranged in front and behind. The partition members have a cover portion for closing the openings of the protective air pipes and the preheating air pipes.

[0012] The partition member is set up and has two states. In the first state, the partition member is located in the cavity groove and separates the cavity groove. In the second state, the partition member is retracted and no longer separates the cavity groove. The cover part of the partition member will close the openings of a protective air pipe and a preheating air pipe distributed in the front and back.

[0013] Furthermore, a partition plate is slidably connected to the connecting block, and the preheating gas box is connected to a return pipe with one end passing into the cavity groove and forming an opening on the inner wall of the cavity groove. A groove for inserting the partition plate is provided on the inner wall of the cavity groove, and a shielding portion for closing the opening of the return pipe is fixed on the partition plate. Sealing rubber strips are provided on both the partition plate and the partition member, and the sealing rubber strips abut against the inner wall of the pipe fitting.

[0014] The partition plate has two states. When it is in the extended state, the cavity groove is separated. When it is in the recovered state, the shielding part closes the opening of the return pipe and the sealing rubber strip abuts against the inner wall of the pipe to achieve sealing.

[0015] Furthermore, a protective gas tank is fixed on the control block, and the protective gas tank is connected to a gas pipe. One end of the gas pipe passes into the cavity groove and forms an opening on the inner wall of the cavity groove.

[0016] Through the provided protective gas tank and gas pipe, protective gas can be introduced into the cavity groove to protect the welding part.

[0017] Furthermore, a rotating block is rotatably arranged in the connecting block, and a connecting shaft is coaxially fixed to the rotating block. The control block is rotatably connected to a rotating shaft sleeve, and the rotating shaft sleeve is sleeved on the connecting shaft and rotates synchronously. One end of the telescopic shaft is rotatably matched with the control block, and the telescopic shaft and the control block are connected to the transmission belt through a pulley set. A protrusion is provided on the rotating block, and one end of the partition member and one end of the partition plate are both in contact with the side wall of the rotating block. A first spring is connected between the partition member and the inner wall of the connecting block, and two ends of the first spring are respectively fixedly connected to the partition member and the inner wall of the connecting block. A second spring is connected between the partition plate and the inner wall of the connecting block, and two ends of the second spring are respectively fixedly connected to the partition plate and the inner wall of the connecting block.

[0018] When the rotating block rotates, the plurality of partition members sequentially abut against the protrusions, thereby pushing the partition members from the second state to the first state through the protrusions. When the protrusions separate from the partition members, the partition members return to the second state under the action of the first spring. After the protrusions completely separate from one partition member, they begin to contact another partition member.

[0019] Furthermore, a guide protrusion is fixedly connected to the partition plate, a guide shell is provided on the rotating block, and a guide groove for the guide protrusion to be embedded is formed between the guide shell and the rotating block.

[0020] When the protrusion moves to the partition plate position, the guide protrusion is embedded in the guide groove for guidance, so that the partition plate moves from the extended state to the retracted state. When the guide protrusion disengages from the guide groove, the partition plate returns to the extended state under the action of the second spring.

[0021] Furthermore, the preheating gas box is connected to a collecting pipe, which is connected to a return pipe. A piston block is provided between the collecting pipe and the return pipe and is connected through the piston block. A rotating shaft is rotatably connected to the piston block, a meshing wheel is fixed to the rotating shaft, a gear ring meshing with the meshing wheel is fixedly connected to the rotating block, one end of the rotating shaft is fixedly connected to a mounting wheel, a hinged rod is hingedly provided on the mounting wheel, a piston rod is hingedly provided at one end of the hinged rod, one end of the piston rod is inserted into the piston block and fixedly connected to a piston plate, a one-way valve is provided on the piston plate, so that the preheating gas on the side of the piston plate close to the return pipe flows to the collecting pipe in one direction.

[0022] Through the provided rotating shaft, meshing wheel and mounting wheel, when the rotating block rotates, it can drive the piston plate to reciprocate, so that the reflux pipe extracts the preheated gas in the cavity groove and recycles it through the collection pipe and returns it to the preheating gas box for heating, thereby continuing to preheat the part to be welded.

[0023] Furthermore, an air pressure sensor is fixed on the side wall of the cavity.

[0024] Through the set air pressure sensor, when welding is completed, the partition plate moves to the retracted state. At this time, protective gas continues to be introduced into the cavity groove through the gas pipe, and the air pressure is detected by the air pressure sensor to detect whether the weld is airtight.

[0025] The beneficial effects of this application are:

[0026] 1. The annular shell and rotating ring can drive the welding gun to rotate around the pipe to achieve circumferential welding of the pipe, which saves you from moving the pipe frequently.

[0027] 2. Through the provided connecting block and two sets of annular groove frames, when the connecting block extends into the pipe fitting, air is inflated through the two annular groove frames, and the weld is located between the two sets of annular groove frames, thereby forming a cavity groove between the two annular groove frames. Shielding gas can be introduced into the cavity groove to provide protection for the welding part inside the pipe fitting. The shielding gas cools the welded area to avoid strength loss and residual stress due to heat accumulation. At the same time, the shielding gas can also be heated to prevent the low-temperature shielding gas from directly impacting the welding area and affecting the welding effect.

[0028] 3. Through the shielding gas box and preheating gas box, when the shielding gas pipe on the shielding gas box recovers the shielding gas, the temperature of the recovered shielding gas is relatively high. At this time, the air in the preheating gas box can be heated by the heat exchange block, and then the heated gas is introduced into the unwelded area of the annular seam through the preheating gas pipe to preheat the area to be welded to ensure the welding effect. The shielding gas can be recovered through the recovery pipe and recovery air bag to reduce resource loss.

[0029] 4. Through the provided rotating shaft, meshing wheel and mounting wheel, when the rotating block rotates, it can drive the piston plate to reciprocate, so that the reflux pipe extracts the preheated gas in the cavity groove and recycles it through the collection pipe and returns it to the preheating gas box for heating, thereby continuing to preheat the part to be welded.

[0030] 5. Through the provided air pressure sensor, when welding is completed, the partition plate moves to the retracted state. At this time, the protective gas continues to be introduced into the cavity groove through the gas pipe, and the air pressure is detected by the air pressure sensor to detect whether the weld is airtight. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings constituting a part of this application are used to provide a further understanding of this application and make other features, purposes and advantages of this application more apparent. The drawings and descriptions of the exemplary embodiments of this application are used to explain this application and do not constitute an improper limitation on this application.

[0032] In addition, throughout the drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and that the elements and components are not necessarily drawn to scale.

[0033] In the attached figure:

[0034] Figure 1 is an overall schematic diagram according to an embodiment of the present application;

[0035] Figure 2 yes Figure 1 A schematic diagram of the installation of the annular housing in the embodiment;

[0036] Figure 3 yes Figure 1 A schematic diagram of the installation of the rotating ring in the embodiment;

[0037] Figure 4 yes Figure 1 A schematic diagram of the installation of the control block in the embodiment;

[0038] Figure 5 yes Figure 1 A schematic diagram of the installation of the rotating sleeve in the embodiment;

[0039] Figure 6 yes Figure 1 A schematic diagram of the installation of the connecting block in the embodiment;

[0040] Figure 7 yes Figure 1 A schematic structural diagram of the cavity slot in the embodiment;

[0041] Figure 8 yes Figure 1 A schematic diagram of the installation of the partition member in the embodiment;

[0042] Figure 9 yes Figure 1 A schematic diagram of the installation of the partition plate in the embodiment;

[0043] Figure 10 yes Figure 1 A schematic structural diagram of the rotating block in the embodiment;

[0044] Figure 11 yes Figure 1 A schematic diagram of the installation of the rotating shaft in the embodiment;

[0045] Figure 12 yes Figure 11 A partial enlarged schematic diagram of transfer point A;

[0046] Figure 13 yes Figure 1 A schematic diagram of the structure of the protective gas box and the preheating gas box in the embodiment;

[0047] Figure 14 yes Figure 1 A schematic diagram of the structure in which the protective air pipe and the preheating air pipe are opened in the cavity groove in the embodiment;

[0048] Figure 15 yes Figure 1 Schematic diagram of the protective gas flow direction and preheating gas flow direction in the embodiment.

[0049] Reference numerals:

[0050] 10. Base; 11. Sliding seat; 12. Fixed table; 13. Annular shell; 14. Rotating ring; 15. Driving motor; 16. Telescopic shaft; 17. Driving wheel; 18. Tooth pattern; 19. Adjusting cylinder; 20. Mounting plate; 21. Welding gun; 22. Clamping block; 23. Clamping block; 24. Driving member; 25. Control block; 26. Connecting block; 27. Control cylinder; 28. Ring groove frame; 29. Annular bag; 30. Telescopic air pipe; 31. Air pump; 32. Cavity groove; 33. Transmission belt; 34. Pulley assembly; 35. Rotating sleeve; 36. Connecting shaft; 37. Rotating block; 38. Raised part; 39. Shielding gas Box; 40, preheating gas box; 41, protective gas pipe; 42, preheating gas pipe; 43, heat exchange block; 44, reflux pipe; 45, piston block; 46, meshing wheel; 47, gear ring; 48, rotating shaft; 49, mounting wheel; 50, hinged rod; 51, piston rod; 52, piston plate; 53, one-way gas valve; 54, collecting pipe; 55, partition; 56, gas pipe; 57, protective gas tank; 58, recovery pipe; 59, first spring; 60, second spring; 61, guide protrusion; 62, guide shell; 63, guide groove; 64, air pressure sensor; 65, recovery air bag; 66, sealing rubber strip; 67, partition. DETAILED DESCRIPTION

[0051] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments described herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are for illustrative purposes only and are not intended to limit the scope of protection of the present disclosure.

[0052] It should also be noted that, for ease of description, only the parts related to the invention are shown in the drawings. In the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0053] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0054] It should be noted that the modifications of "one" and "multiple" mentioned in the present disclosure are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, they should be understood as "one or more".

[0055] The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0056] Reference Figure 1-15A welding device for aluminum cast automobile engine pipe fittings includes: a base 10, a sliding seat 11, a fixed platform 12, an annular shell 13, a rotating ring 14, an adjustment cylinder 19, a mounting plate 20, a welding gun 21, a driving motor 15, a telescopic shaft 16, a driving wheel 17, a tooth pattern 18, a pipe clamping block 22, and a clamping block 23. The sliding seat 11 is slidably arranged on the base 10 along the axial direction of the pipe fitting, and a screw rod is rotatably connected to the base 10. The screw rod passes through the sliding seat 11 and is threadedly connected to the sliding seat 11. The motor drives the screw rod to drive the sliding seat 11 to move. The fixed platform 12 is fixedly mounted on the sliding seat 11, and the annular shell 13 is fixedly mounted on the fixed platform 12. The annular shell 13 is located coaxially with the pipe fitting to be welded. Two sets of pipe clamping blocks 22 are slidingly arranged on the base 10. The two sets of pipe clamping blocks 22 clamp the two sections of pipe fittings to be welded respectively. A through hole is provided in the center of the pipe clamping block 22 for inserting the pipe fittings. Three sets of clamping blocks 23 are arranged in the through hole. Three sets of driving members 24 are fixedly connected to the pipe clamping block 22. The driving member 24 can be a cylinder. The clamping block 23 is fixedly connected to one end of the piston rod of the cylinder. The clamping block 23 is driven by the driving member 24 to clamp and fix the pipe fittings, so as to align the two pipe fittings to be welded. An electric slide rail is fixedly installed on the base 10. The pipe clamping block 22 can be installed on the electric slide rail and its position can be adjusted by the electric slide rail. The rotating ring 14 is rotatably arranged on the inner side of the annular shell 13, and the adjusting cylinder 19 is fixedly mounted on the rotating ring 14. A mounting plate 20 is fixedly arranged at one end of the piston rod of the adjusting cylinder 19, and the welding gun 21 is fixedly mounted on the mounting plate 20. The rotating ring 14 rotates to weld the pipe fittings. A drive motor 15 is fixedly mounted on the fixed platform 12. The power output of the drive motor 15 is fixedly connected to a telescopic shaft 16. A drive wheel 17 located within the fixed platform 12 is fixedly mounted on the telescopic shaft 16. The outer circumference of the rotating ring 14 is provided with teeth 18 that mesh with the drive wheel 17. The specific transmission ratio can be determined experimentally. The power output of the drive motor 15 drives the rotating ring 14 to rotate.

[0057] A control block 25 is fixedly mounted on the base 10. Two sets of control cylinders 27 are fixedly connected to the control block 25. One end of the piston rod of the control cylinder 27 is fixedly connected to a connection block 26 coaxially arranged with the annular shell 13. The control cylinder 27 allows the connection block 26 to extend into the pipe. Two sets of annular groove frames 28 are fixedly mounted on the connection block 26. An annular sac 29 is connected to the outer edge of the annular groove frames 28. After the connection block 26 extends into the pipe, the two annular groove frames 28 are located on either side of the pipe weld. An air pump 31 is fixedly mounted on the pipe clamp block 22. A telescopic air pipe 30 is connected between the two sets of annular groove frames 28 and communicates with each other through the telescopic air pipe 30. The air outlet of the air pump 31 is connected to the telescopic air pipe 30. The air pump 31 is used to inflate the two sets of annular groove frames 28, causing the annular sac 29 to expand and abut against the inner wall of the pipe. A cavity 32 is formed between the two annular groove frames 28 and the inner wall of the pipe fitting. A shielding gas box 39 and a preheating gas box 40 are fixedly installed in the connecting block 26. The shielding gas box 39 is provided with multiple shielding gas pipes 41 distributed circumferentially. One end of the shielding gas pipe 41 extends into the cavity 32 and forms an opening on the inner wall of the cavity 32. The preheating gas box 40 is provided with multiple preheating gas pipes 42 distributed circumferentially. One end of the preheating gas pipe 42 extends into the cavity 32. The number of shielding gas pipes 41 and preheating gas pipes 42 is the same, and the shielding gas pipes 41 and preheating gas pipes 42 are arranged in front and behind along the axis of the connecting block 26. A shielding gas tank 57 is fixed to the control block 25. The shielding gas tank 57 is connected to a gas supply pipe 56. One end of the gas supply pipe 56 extends into the cavity 32 and forms an opening on the inner wall of the cavity 32. The shielding gas box 39 is connected to a recovery pipe 58, which is connected to a recovery air bag 65. A heat exchange block 43 is provided between the shielding gas box 39 and the preheating gas box 40. When the shielding gas tank 57 introduces shielding gas into the connecting shaft 36, the shielding gas is recovered through the recovery pipe 58 and stored in the recovery air bag 65.

[0058] A plurality of partition members 55 are slidably mounted on the connection block 26, one end of which is positioned within the cavity 32. The inner wall of the cavity 32 defines a slot for the partition members 55 to be inserted. The partition members 55 separate the opening of the protective gas pipe 41 and the opening of the preheating gas pipe 42, which are arranged in a front-to-rear manner. The partition members 55 have a cover portion that seals the openings of the protective gas pipe 41 and the preheating gas pipe 42. A partition plate 67 is slidably mounted on the connection block 26. The preheating gas box 40 is connected to the return pipe 44, one end of which extends into the cavity 32 and forms an opening on the inner wall of the cavity 32. The inner wall of the cavity 32 defines a slot for the partition member 67 to be inserted, and a shielding portion is fixed to the partition plate 67 to seal the opening of the return pipe 44. The partition member 55 has two states. In the first state, the partition member 55 is located within the cavity 32, dividing the cavity 32. In the second state, the partition member 55 is retracted and no longer divides the cavity 32. The cover portion of the partition member 55 seals the openings of the protective air pipe 41 and the preheating air pipe 42, which are arranged in front and behind. The partition plate 67 has two states. When extended, it divides the cavity 32. When retracted, the shielding portion seals the opening of the return pipe 44.

[0059] When the partition plate 67 is in the extended state, one of the partition members 55 is in the first state. At this time, the partition plate 67 and the partition member 55 divide the cavity groove 32 into two parts, the welding area and the welded area are located in one part, and the area to be welded is located in the other part. The shielding gas flows from the welded area until it flows to the welding area, and then returns to the shielding gas box 39 through the preheating gas pipe 42. The shielding gas cools the welded area to avoid strength loss and residual stress due to heat accumulation. At the same time, it can also heat the shielding gas to prevent the lower temperature shielding gas from directly impacting the welding area and affecting the welding effect. At this time, the temperature of the shielding gas is relatively high, and the gas in the preheating gas box 40 is heated by the heat exchange block 43. The gas in the preheating gas box 40 is passed into the area to be welded through the preheating gas pipe 42 and flows until the collecting pipe 54 is retracted to preheat the area to be welded.

[0060] To enable the partition member 55 to sequentially move from the second state to the first state, a rotating block 37 is rotatably disposed within the connecting block 26. The connecting shaft 36 is coaxially fixed to the rotating block 37. The control block 25 is rotatably connected to a rotating sleeve 35, which is sleeved on the connecting shaft 36 and rotates synchronously. One end of the telescopic shaft 16 is rotatably engaged with the control block 25. The telescopic shaft 16 and the control block 25 are driven by a pulley assembly 34 and a transmission belt 33. This allows the telescopic shaft 16 to extend and retract without obstructing the movement of the sliding seat 11. The specific transmission ratio can be determined experimentally. The rotating block 37 has a raised portion 38. One end of the partition member 55 and one end of the partition plate 67 both abut against the side wall of the rotating block 37. A first spring 59 is connected between the partition member 55 and the inner wall of the connecting block 26. The ends of the first spring 59 are fixedly connected to the partition member 55 and the inner wall of the connecting block 26, respectively. A second spring 60 is connected between the partition plate 67 and the inner wall of the connecting block 26. The ends of the second spring 60 are fixedly connected to the partition plate 67 and the inner wall of the connecting block 26, respectively. When the rotating block 37 rotates, the multiple partition members 55 sequentially abut against the raised portion 38, which in turn pushes the partition members 55 from the second state to the first state. When the raised portion 38 disengages from the partition member 55, the partition member 55 returns to the second state under the action of the first spring 59. After the raised portion 38 completely disengages from one partition member 55, it begins to contact another partition member 55. When welding is performed and the rotating ring 14 rotates, the control cylinder 27 also begins to rotate.

[0061] A guide protrusion 61 is fixedly connected to the partition plate 67, and a guide shell 62 is provided on the rotating block 37. A guide groove 63 for the guide protrusion 61 to be embedded in is formed between the guide shell 62 and the rotating block 37. When the protrusion 38 moves to the position of the partition plate 67, the guide protrusion 61 is embedded in the guide groove 63 for guidance, so that the partition plate 67 moves from the extended state to the retracted state. When the guide protrusion 61 disengages from the guide groove 63, the partition plate 67 returns to the extended state under the action of the second spring 60.

[0062] A collecting pipe 54 is fixedly connected to the preheating gas box 40, and the collecting pipe 54 is connected to the return pipe 44. A piston block 45 is provided between the collecting pipe 54 and the return pipe 44 and is connected through the piston block 45. A rotating shaft 48 is rotatably connected to the piston block 45, and a meshing wheel 46 is fixed to the rotating shaft 48. A gear ring 47 meshing with the meshing wheel 46 is fixedly connected to the rotating block 37. One end of the rotating shaft 48 is fixedly connected to the mounting wheel 49, and a hinged rod 50 is hingedly provided on the mounting wheel 49. A piston rod 51 is hinged at one end of the hinged rod 50. One end of the piston rod 51 is inserted into the piston block 45 and fixedly connected to the piston plate 52. A one-way air valve 53 is provided on the piston plate 52, so that the preheating gas on the side of the piston plate 52 close to the return pipe 44 can flow to the collecting pipe 54 in one direction. When the rotating block 37 rotates, it can drive the piston plate 52 to reciprocate, so that the return pipe 44 extracts the preheating gas in the cavity groove 32 and recovers it through the collection pipe 54 and returns it to the preheating gas box 40 for heating, thereby continuing to preheat the part to be welded.

[0063] An air pressure sensor 64 is fixed on the side wall of the cavity groove 32. When welding is completed, the partition plate 67 moves to the recovery state. At this time, protective gas continues to be introduced into the cavity groove 32 through the gas pipe 56, and the air pressure is detected by the air pressure sensor 64. When the air pressure drops rapidly, the weld leaks and needs to be inspected to detect whether the weld is airtight, so that a preliminary inspection can be performed.

[0064] In the initial state, the guide protrusion 61 is embedded in the guide groove 63, the partition plate 67 is in the retracted state, and the partition member 55 is in the second state.

[0065] Working or installation process:

[0066] 1. Secure the pipe to be welded to the two clamping blocks 22 and align the ends. Simultaneously, adjust the position of the sliding seat 11 so that the welding head of the welding torch 21 is aligned with the weld seam. Control the air cylinder 27 to extend the connecting block 26 into the pipe. Position the two sets of annular groove frames 28 on either side of the weld seam. Use the air pump 31 to force the annular sac 29 against the inner wall of the pipe. Begin welding by activating the drive motor 15 to output power, gradually driving the rotating ring 14 to rotate, thereby moving the welding torch 21 to weld. When the telescopic shaft 16 rotates, it drives the rotating block 37, causing the guide protrusion 61 to disengage the guide groove 63. The second spring 60 then returns the partition plate 67 to its extended position. At this point, the shielding gas tank 57 also supplies shielding gas to the cavity 32 via the gas pipe 56.

[0067] 2. When the protrusion 38 sequentially contacts the plurality of partition members 55, the partition members 55 are pushed to the first position. At this point, the partition members 55 cooperate with the partition plate 67 to separate the cavity 32 into two sections. The two sections gradually change in size as welding progresses, with the welding area and the welded area located in one section, and the area to be welded located in the other section. Shielding gas flows from the welded area to the welding area, then returns to the shielding gas box 39 through the preheating gas pipe 42. At this point, the shielding gas temperature is relatively high, and the heat exchange block 43 heats the gas in the preheating gas box 40.

[0068] 3. When the rotating block 37 rotates, it drives the rotating shaft 48 to move, and then the preheating gas in the area to be welded is recovered through the collecting pipe 54 to the preheating gas box 40 for reheating, thereby circulating to avoid heat loss.

[0069] 4. After the rotating ring 14 rotates one circle and the pipe welding is completed, the rotating block 37 also rotates one circle. At this time, the partition plate 67 and the partition member 55 return to the initial state. The protective gas continues to be introduced into the cavity groove 32 through the protective gas tank 57, and the air pressure is detected by the air pressure sensor 64 to preliminarily detect the welding air tightness.

[0070] The above description is only an illustration of some preferred embodiments of the present disclosure and the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the embodiments of the present disclosure is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but should also cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the above-mentioned inventive concept. For example, the above-mentioned features are replaced with (but not limited to) technical features with similar functions disclosed in the embodiments of the present disclosure.

Claims

1. A welding device for aluminum cast automobile engine pipes, comprising: The base (10) is characterized by: Also includes: A sliding seat (11) is slidably arranged on the base (10); A fixed platform (12) is fixedly mounted on the sliding seat (11); An annular shell (13) is fixedly mounted on the fixing platform (12); A rotating ring (14) is rotatably arranged inside the annular shell (13); An adjusting cylinder (19) is fixed on the rotating ring (14); A mounting plate (20) is fixedly mounted on one end of the piston rod of the adjustment cylinder (19); A welding gun (21) is fixedly mounted on the mounting plate (20); A driving motor (15) is fixedly mounted on the fixing platform (12); A telescopic shaft (16) is fixed to the power output end of the driving motor (15), and the telescopic shaft (16) passes through the fixed platform (12); A driving wheel (17) is fixedly arranged on the telescopic shaft (16), and a tooth pattern (18) is provided on the outer periphery of the rotating ring (14) for meshing with the driving wheel (17); Two pipe clamping blocks (22) are also slidably provided on the base (10), and three groups of evenly spaced clamping blocks (23) are provided on the pipe clamping blocks (22). A driving member (24) for driving the pipe clamping blocks (22) is provided on the pipe clamping blocks (22). The pipe fitting is clamped by the three groups of clamping blocks (23) so that the pipe fitting is coaxial with the annular shell (13); The protective component is used to provide protective gas to the inner wall of the pipeline.

2. The welding device for aluminum cast automobile engine pipe according to claim 1, characterized in that: The protection component comprises: a control block (25) fixedly arranged on the base (10), a control cylinder (27) fixedly connected to the control block (25), a connecting block (26) coaxially arranged with the annular shell (13) fixedly connected to one end of the piston rod of the control cylinder (27), the connecting block (26) extending into the pipe fitting, two groups of annular groove frames (28) fixedly connected to the connecting block (26), an annular bag (29) connected to the outer edge of the annular groove frame (28), an air pump (31) fixedly installed on the pipe clamping block (22), a telescopic air pipe (30) connected between the two groups of annular groove frames (28) and communicated through the telescopic air pipe (30), an air outlet end of the air pump (31) connected to the telescopic air pipe (30), and the two groups of annular groove frames (28) are inflated by the air pump (31) so that the annular bag (29) expands and abuts against the inner wall of the pipe fitting.

3. The welding device for aluminum cast automobile engine pipes according to claim 2, characterized in that: A cavity groove (32) is formed between the two annular groove frames (28), and a protective gas box (39) and a preheating gas box (40) are fixedly arranged in the connecting block (26). The protective gas box (39) is provided with a plurality of protective gas pipes (41) distributed circumferentially. One end of the protective gas pipe (41) is passed into the cavity groove (32) and forms an opening on the inner wall of the cavity groove (32). The preheating gas box (40) is provided with a plurality of preheating gas pipes (42) distributed circumferentially. One end of the preheating air pipe (42) is passed into the cavity groove (32), the number of the protective air pipe (41) and the preheating air pipe (42) is the same, and the protective air pipe (41) and the preheating air pipe (42) are arranged front and back along the axis of the connecting block (26), the protective air box (39) is connected to a recovery pipe (58), and the recovery pipe (58) is connected to a recovery air bag (65), and a heat exchange block (43) is provided between the protective air box (39) and the preheating air box (40).

4. The welding device for aluminum cast automobile engine pipes according to claim 3, characterized in that: A plurality of partition members (55) are slidably provided on the connecting block (26), one end of which is located in the cavity groove (32). A groove for inserting the partition members (55) is provided on the inner wall of the cavity groove (32). The partition members (55) separate the openings of the protective air pipe (41) and the opening of the preheating air pipe (42) arranged in front and behind. The partition members (55) have a cover portion for closing the openings of the protective air pipe (41) and the preheating air pipe (42).

5. The welding device for aluminum cast automobile engine pipe according to claim 4, characterized in that: A partition plate (67) is slidably connected to the connecting block (26). The preheating gas box (40) is connected to a return pipe (44) having one end extending into the cavity groove (32) and forming an opening on the inner wall of the cavity groove (32). A groove for inserting the partition plate (67) is provided on the inner wall of the cavity groove (32). A shielding portion for closing the opening of the return pipe (44) is fixed on the partition plate (67). A sealing rubber strip (66) is provided on both the partition plate (67) and the partition member (55). The sealing rubber strip (66) abuts against the inner wall of the pipe member.

6. The welding device for aluminum cast automobile engine pipes according to claim 5, characterized in that: A protective gas tank (57) is fixed on the control block (25), and the protective gas tank (57) is connected to a gas pipe (56). One end of the gas pipe (56) is passed into the cavity groove (32) and forms an opening on the inner wall of the cavity groove (32).

7. The welding device for aluminum cast automobile engine pipes according to claim 6, characterized in that: A rotating block (37) is rotatably provided in the connecting block (26), and a connecting shaft (36) is coaxially fixed to the rotating block (37). The control block (25) is rotatably connected to a rotating shaft sleeve (35), and the rotating shaft sleeve (35) is sleeved on the connecting shaft (36) and rotates synchronously. One end of the telescopic shaft (16) is rotatably matched with the control block (25). The telescopic shaft (16) and the control block (25) are connected to each other through a pulley group (34) and a transmission belt (33). A protrusion (38) is provided on the rotating block (37). One end of the plate member (55) and one end of the partition plate (67) are both in contact with the side wall of the rotating block (37); a first spring (59) is connected between the partition member (55) and the inner wall of the connecting block (26); two ends of the first spring (59) are respectively fixedly connected to the partition member (55) and the inner wall of the connecting block (26); a second spring (60) is connected between the partition plate (67) and the inner wall of the connecting block (26); two ends of the second spring (60) are respectively fixedly connected to the partition plate (67) and the inner wall of the connecting block (26).

8. The welding device for aluminum cast automobile engine pipes according to claim 7, characterized in that: A guide protrusion (61) is fixedly connected to the partition plate (67), a guide shell (62) is provided on the rotating block (37), and a guide groove (63) for the guide protrusion (61) to be embedded is formed between the guide shell (62) and the rotating block (37).

9. The welding device for aluminum cast automobile engine pipes according to claim 8, characterized in that: The preheating gas box (40) is connected to a collecting pipe (54), which is connected to a return pipe (44). A piston block (45) is provided between the collecting pipe (54) and the return pipe (44). The piston block (45) is connected to a rotating shaft (48) in a rotatable manner. A meshing wheel (46) is fixed to the rotating shaft (48). A gear ring (47) meshing with the meshing wheel (46) is fixed to the rotating block (37). One end of the shaft (48) is fixedly connected to a mounting wheel (49), a hinged rod (50) is hingedly provided on the mounting wheel (49), one end of the hinged rod (50) is hingedly connected to a piston rod (51), one end of the piston rod (51) is inserted into the piston block (45) and fixedly connected to a piston plate (52), and a one-way air valve (53) is provided on the piston plate (52), so that the gas on the side of the piston plate (52) close to the return pipe (44) can flow in one direction to the side close to the collection pipe (54).

10. The welding device for aluminum cast automobile engine pipes according to claim 3, characterized in that: An air pressure sensor (64) is fixed on the side wall of the cavity groove (32).

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