A welding device for processing trolley parts

Abstract

The application relates to the technical field of electric arc welding, in particular to a welding device for trolley part machining, which comprises a welding table and a supporting column fixedly installed on the top of the welding table, an active seat is arranged above the supporting column, an elastic unit matched with the active seat is installed on the supporting column, an electric arc welding gun is penetrated through the active seat, a locking piece matched with the active seat is installed on the electric arc welding gun, a synchronous frame used for contacting the end of a contrast group pipe is arranged above the supporting column, the movement of the electric arc welding gun is not controlled by a preset program, but is directly driven by the solid outline of the contrast group pipe through a mechanical mechanism, the risk that the programmed track does not match the actual workpiece is completely avoided, the real-time accurate coincidence of the welding track of the electric arc welding gun and the joint of the workpiece is guaranteed, so that the heating center of the electric arc does not deviate from the joint, and the heat can uniformly act on the two side pipe fittings.

Description

Technical Field

[0001] This invention relates to the field of arc welding technology, and in particular to a welding apparatus for processing handcart parts. Background Technology

[0002] Key load-bearing components of handcarts, such as the connection between the handle and the tubular fittings, typically employ annular tubular structures. To ensure the safety and durability of the vehicle during use, this connection must be welded to form a continuous annular weld with sufficient penetration depth and strength. Arc welding, due to its high energy density, excellent cladding capability, and good process adaptability, has become the preferred method for such annular tubular fitting connections.

[0003] However, it is worth considering that currently, for circumferential welding of non-circular end faces, the operation mainly relies on the operator to manually control the movement of the welding torch along the trajectory. This leads to uneven welding spacing and changes in the position of the welding torch, which in turn causes unstable arc length and fluctuations in heat input. Ultimately, this results in uneven weld penetration, undercut, or incomplete penetration, which seriously affects the fatigue strength of the joint and has certain limitations.

[0004] Therefore, in order to solve the above problems, a more suitable facility that meets the needs of users is needed. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a welding device for processing handcart parts, so as to solve the problem that the circumferential welding of the above-mentioned non-circular end face mostly relies on the operator to manually control the movement of the welding torch along the trajectory. This leads to uneven welding spacing and changes in the position of the welding torch, which in turn causes unstable arc length and heat input fluctuations, ultimately resulting in uneven weld penetration, undercut, or incomplete penetration.

[0006] To achieve the above objectives, the present invention provides a welding device for processing handcart parts, including a welding table and a support column fixedly installed on the top of the welding table. A movable seat is provided above the support column, and an elastic unit that cooperates with the movable seat is installed on the support column. An arc welding gun is threaded through the movable seat, and a locking component that cooperates with the movable seat is installed on the arc welding gun. A synchronization frame for contacting the end of the control tube is provided above the support column, and a translation mechanism that cooperates with the synchronization frame is installed on the movable seat. A correction structure for correcting the position of the tube to be welded is installed on the movable seat. Two three-jaw chucks are provided above the welding table, and a drive component for driving the three-jaw chucks to rotate and lift is installed on the welding table.

[0007] Optionally, the elastic unit includes a tension spring disposed below the movable seat, a groove is provided on the top of the support column, the bottom end of the movable seat is slidably installed in the groove, and the two ends of the tension spring are fixedly connected to the bottom of the movable seat and the bottom of the inner wall of the groove, respectively. At least one first lead screw passes through the support column and passes through the movable seat. The two ends of the first lead screw are respectively fitted with first nuts, and two adjacent first nuts are in contact with the two sides of the support column, respectively.

[0008] Optionally, the translation mechanism includes a rectangular ring fixedly installed on the synchronous frame. The rectangular ring passes through the movable seat, and support parts are fixedly connected to both sides of the movable seat. A second lead screw is fixedly connected to the support part, and the rectangular ring is sleeved on the outside of the second lead screw. A second nut is sleeved on the end of the second lead screw away from the support part, and the second nut is in contact with the rectangular ring.

[0009] Optionally, the locking component includes a threaded sleeve fixedly fitted outside the arc welding gun, with two third nuts fitted outside the threaded sleeve, and the two third nuts respectively contacting the two sides of the movable seat.

[0010] Optionally, the correction structure includes a swing arm rotatably mounted on a movable seat, a positioner for positioning the swing arm on the movable seat, a correction frame fixedly connected to the end of the swing arm away from the movable seat, a plurality of sliding seats slidably sleeved on the outside of the correction frame, a pressing mechanism cooperating with the sliding seats installed on the correction frame, a support sleeve fixedly connected to the end of the sliding seats away from the correction frame, two correction columns slidably arranged inside the support sleeve, and a synchronous moving mechanism cooperating with the two correction columns respectively installed on the support sleeve.

[0011] Optionally, the pressing mechanism includes a first hydraulic telescopic rod fixedly installed on the calibration frame, the telescopic end of the first hydraulic telescopic rod being fixedly connected to a pressing frame, and the sliding seat and the pressing frame being in contact.

[0012] Optionally, the synchronous movement mechanism includes guide columns fixedly installed on both sides of the correction column. The inner wall of the support sleeve has four first rectangular holes, and the guide columns pass through the corresponding first rectangular holes. The two correction columns have grooves on their adjacent sides. The support sleeve contains compression springs, with the two ends of the compression springs located in the two grooves and fixedly connected to the inner walls of the two grooves. The two sides of the sliding seat are fixedly connected to slide rails, and the slide rails are slidably fitted with side plates. The side plates have two second rectangular holes, and the guide columns pass through the corresponding second rectangular holes. Adjacent side plates are connected by clamping members.

[0013] Optionally, the clamping component includes positioning blocks that are fixedly installed on the opposite side of the two side plates. A clamping plate is sleeved on the outside of the positioning block. Two fourth lead screws are fixedly connected to one of the clamping plates, and the fourth lead screws pass through the other corresponding clamping plate. A fifth nut is sleeved on the outside of the fourth lead screws.

[0014] Optionally, the positioner includes a movable ring disposed above the support column, three third lead screws are fixedly connected to the movable ring, the third lead screws pass through the movable seat, and a fourth nut is sleeved on the end of the third lead screw away from the movable ring. The swing arm is provided with positioning holes that cooperate with the third lead screws, and one of the third lead screws passes through the corresponding positioning hole.

[0015] Optionally, the drive assembly includes a lifting housing disposed above the welding table, with a three-jaw chuck located above the lifting housing. Several second hydraulic telescopic rods are fixedly connected to the welding table, and the telescopic ends of the second hydraulic telescopic rods are fixedly connected to the lifting housing. A first rotating shaft is fixedly connected to the bottom end of the three-jaw chuck, and the first rotating shaft is rotatably connected to the lifting housing. Two second rotating shafts are rotatably connected inside the lifting housing, and a synchronizer that cooperates with the first rotating shaft is installed at the top end of the second rotating shaft. A worm gear is rotatably connected to the lifting housing, and a servo motor is fixedly connected to the lifting housing. The output end of the servo motor is fixedly connected to the worm gear. A worm wheel that meshes with the worm gear is fixedly sleeved on the outside of the second rotating shaft, and the teeth on the two worm wheels are inclined in opposite directions.

[0016] Optionally, the synchronizer includes a first synchronizer wheel fixedly mounted on the top of the second shaft, the bottom of the first shaft being fixedly connected to the second synchronizer wheel, and the bottom of the second synchronizer wheel contacting the top of the first synchronizer wheel.

[0017] The beneficial effects of this invention are as follows: The drive assembly drives two three-jaw chucks to rotate in opposite directions. The three-jaw chucks drive the control group pipe to rotate, and the end of the control group pipe drags the synchronous frame and movable seat to move vertically. The movable seat drives the arc welding gun to move synchronously vertically. The welding trajectory of the arc welding gun is consistent with the shape of the end of the control group pipe, ensuring that the arc welding gun performs circumferential welding on the connection between the two pipes to be welded. The movement of the arc welding gun is not controlled by a preset program, but is directly driven by the physical contour of the control group pipe through a mechanical mechanism, completely avoiding the risk of mismatch between the programmed trajectory and the actual workpiece. When the pipe is rotated, the arc welding gun moves smoothly and continuously in the vertical direction under the synchronous mechanical drag, and is completely determined by the contour shape of the control pipe. There will be no sudden changes or lags, ensuring that the welding trajectory of the arc welding gun matches the workpiece joint in real time and accurately. This ensures that the heating center of the arc does not deviate from the joint, and the heat can be applied evenly to both sides of the pipe. This avoids periodic fluctuations in the arc length caused by asynchrony, thus avoiding affecting the uniformity of the welding quality. This provides the basis for maintaining a constant arc length and uniform heat input, which is the key to obtaining uniform penetration and weld formation, and improves the quality of arc welding. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 This is one of the structural schematic diagrams of the correction structure according to an embodiment of the present invention; Figure 3 This is a second schematic diagram of the correction structure according to an embodiment of the present invention; Figure 4 This is a schematic diagram showing the disassembled structure of the movable seat and support column according to an embodiment of the present invention; Figure 5 For the present invention Figure 4 Enlarged structural diagram of region A in the middle; Figure 6 This is a schematic diagram of the disassembled locator according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the calibration frame according to an embodiment of the present invention; Figure 8 This is one of the structural schematic diagrams of the clamping member according to an embodiment of the present invention; Figure 9 This is a second schematic diagram of the structure of the clamping component according to an embodiment of the present invention; Figure 10 This is a schematic diagram of the structure of the sliding seat according to an embodiment of the present invention; Figure 11 This is a schematic diagram of the support sleeve according to an embodiment of the present invention; Figure 12 This is a schematic diagram of the structure of the correction column according to an embodiment of the present invention; Figure 13 This is a schematic diagram of the internal structure of the lifting shell according to an embodiment of the present invention; Figure 14 This is a schematic diagram of the synchronizer in an embodiment of the present invention.

[0020] The diagram is marked as follows: 1. Welding table; 2. Support column; 3. Movable seat; 4. Arc welding gun; 5. Swing arm; 6. Synchronizing frame; 7. Three-jaw chuck; 8. Tension spring; 9. Slide groove; 10. First lead screw; 11. First nut; 12. Rectangular ring; 13. Support part; 14. Second lead screw; 15. Second nut; 16. Threaded sleeve; 17. Third nut; 18. Alignment frame; 19. Sliding seat; 20. Movable ring; 21. Third lead screw; 22. Fourth nut; 23. Positioning hole; 24. Pressing frame; 25. First 26. Hydraulic telescopic rod; 27. Support sleeve; 28. Correction column; 29. ​​Groove; 30. Compression spring; 31. First rectangular hole; 32. Guide column; 33. Side plate; 34. Slide rail; 35. Second rectangular hole; 36. Positioning block; 37. Clamping plate; 38. Fourth lead screw; 39. Fifth nut; 40. Lifting shell; 41. Second hydraulic telescopic rod; 42. First rotating shaft; 43. Second rotating shaft; 44. First synchronous pulley; 45. Second synchronous pulley; 46. Worm gear; 47. Worm; 48. Servo motor. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0022] Example 1, by Figure 1 , Figure 2 and Figure 3 The present invention includes a welding table 1 and a support column 2 fixedly installed on the top of the welding table 1. A movable seat 3 is provided above the support column 2, and an elastic unit that cooperates with the movable seat 3 is installed on the support column 2. An arc welding gun 4 passes through the movable base 3. A locking component that cooperates with the movable base 3 is installed on the arc welding gun 4. A synchronization frame 6 is located above the support column 2 for contacting the end of the control group pipe fitting. A translation mechanism that cooperates with the synchronization frame 6 is installed on the movable base 3. A correction structure for correcting the position of the pipe fitting to be welded is installed on the movable base 3. Two three-jaw chucks 7 are located above the welding table 1. A drive assembly for driving the rotation and lifting of the three-jaw chucks 7 is installed on the welding table 1. Based on the specifications of the pipe fittings to be welded in the same batch, a control group pipe fitting of the same specification is selected. The control group pipe fitting is fixed by a three-jaw chuck 7 located below the synchronization frame 6. Then, the pipe fitting to be welded... The pipe fitting is fixedly installed on another three-jaw chuck 7. The two three-jaw chucks 7 are driven upwards by a drive assembly so that the top of the control group pipe fitting contacts the synchronous frame 6. The operator drives the pipe fitting to be welded and the corresponding three-jaw chuck 7 to rotate. Then, the position of the pipe fitting to be welded is corrected by a correction structure to ensure that the end shape of the pipe fitting to be welded is symmetrically placed with the end shape of the control group pipe fitting. The operator then aligns another pipe fitting to be welded with the pipe fitting installed on the three-jaw chuck 7, and then uses an arc welding gun 4 to spot weld the connection between the two pipe fittings. This initially connects the two pipe fittings together, eliminating the need for the operator to hold the two pipe fittings for welding. The pipe fitting, through the elastic unit, applies downward pressure to the movable seat 3 to keep the synchronous frame 6 in close contact with the control pipe fitting. At this time, the drive assembly drives the two three-jaw chucks 7 to rotate in opposite directions. The three-jaw chucks 7 drive the control pipe fitting to rotate, and the end of the control pipe fitting drags the synchronous frame 6 and the movable seat 3 to move vertically. The movable seat 3 drives the arc welding gun 4 to move vertically synchronously. The welding trajectory of the arc welding gun 4 is consistent with the shape of the end of the control pipe fitting, ensuring that the arc welding gun 4 performs circumferential welding on the connection between the two pipe fittings. The movement of the arc welding gun 4 is not controlled by a preset program, but is directly driven by the solid contour of the control pipe fitting through a mechanical mechanism, completely avoiding To mitigate the risk of mismatch between the programmed trajectory and the actual workpiece, when the pipe to be welded rotates, the arc welding gun 4 moves smoothly and continuously in the vertical direction under the synchronous mechanical drag. This movement is entirely determined by the contour shape of the control pipe, without any abrupt changes or lags. This ensures that the welding trajectory of the arc welding gun 4 precisely matches the joint of the workpiece in real time, so that the heating center of the arc does not deviate from the joint. The heat can be evenly applied to both sides of the pipe, avoiding periodic fluctuations in the arc length caused by asynchrony, and thus avoiding affecting the uniformity of the welding quality. This provides the foundation for maintaining a constant arc length and uniform heat input, which is key to obtaining uniform penetration and weld formation, thereby improving the quality of arc welding.

[0023] Example 2, based on Example 1, is... Figure 2 , Figure 3 , Figure 4 and Figure 5The elastic unit includes a tension spring 8 disposed below the movable seat 3. A groove 9 is provided at the top of the support column 2. The bottom end of the movable seat 3 is slidably installed in the groove 9. Both ends of the tension spring 8 are fixedly connected to the bottom of the movable seat 3 and the bottom of the inner wall of the groove 9, respectively. At least one first lead screw 10 passes through the support column 2 and through the movable seat 3. First nuts 11 are respectively fitted at both ends of the first lead screw 10, and two adjacent first nuts 11 contact the two sides of the support column 2. The translation mechanism includes components fixedly installed on the synchronous frame 6. A rectangular ring 12 passes through a movable seat 3. Support parts 13 are fixedly connected to both sides of the movable seat 3. A second lead screw 14 is fixedly connected to the support part 13. The rectangular ring 12 is sleeved on the outside of the second lead screw 14. A second nut 15 is sleeved on the end of the second lead screw 14 away from the support part 13. The second nut 15 is in contact with the rectangular ring 12. The locking component includes a threaded sleeve 16 fixedly sleeved on the outside of the arc welding gun 4. Two third nuts 17 are sleeved on the outside of the threaded sleeve 16. The two third nuts 17 are in contact with both sides of the movable seat 3. When the top of the control group pipe fitting contacts the synchronous frame 6, the tension spring 8 is in a stretched state. The tension spring 8 applies a downward force to the movable seat 3. To drive the control group pipe fitting to rotate so that the synchronous frame 6 and the movable seat 3 can move vertically, the operator drives the first nut 11 to disengage from the first lead screw 10, releasing the fixation on the first lead screw 10. The operator then drives the first lead screw 10 to disengage from the movable seat 3 and the support column 2, releasing the restriction on the vertical position of the movable seat 3. When the control group pipe fitting rotates, its top pushes the synchronous frame 6 and the rectangular ring 12 to move vertically. The rectangular ring 12 drives the movable seat 3 to slide relative to the support column 2. The tension spring 8 applies a downward force to the movable seat 3 so that the synchronous frame 6 remains in contact with the top of the control group pipe fitting. The operator then drives the synchronous frame 6 and the rectangular ring 12 to slide relative to the support column 2. The sliding of the movable seat 3 adjusts the horizontal position of the synchronization frame 6, ensuring that the synchronization frame 6 is in contact with the corresponding position of the control group pipe fitting. After the position of the synchronization frame 6 is adjusted, the operator drives the second nut 15 to rotate relative to the second lead screw 14. The rectangular ring 12 is clamped and fixed between the support part 13 and the second nut 15, so that the rectangular ring 12 and the synchronization frame 6 are fixed relative to the movable seat 3. The operator drives the arc welding gun 4 and the threaded sleeve 16 to move horizontally relative to the movable seat 3, thereby adjusting the initial distance between the arc welding gun 4 and the position to be welded. Then, the operator drives the two adjacent third nuts 17 to rotate relative to the threaded sleeve 16. The two adjacent third nuts 17 are in close contact with the movable seat 3, and the threaded sleeve 16 is fixed relative to the third nuts 17 and the movable seat 3 respectively, so that the arc welding gun 4 is fixed relative to the movable seat 3.

[0024] Example 3, based on Example 1, is... Figure 3 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 and Figure 12 The calibration structure includes a swing arm 5 rotatably mounted on a movable base 3. A positioner for positioning the swing arm 5 is mounted on the movable base 3. A calibration frame 18 is fixedly connected to the end of the swing arm 5 away from the movable base 3. Several sliding seats 19 are slidably sleeved on the outside of the calibration frame 18. A pressing mechanism cooperating with the sliding seats 19 is mounted on the calibration frame 18. A support sleeve 26 is fixedly connected to the end of the sliding seat 19 away from the calibration frame 18. Two calibration columns 27 are slidably arranged inside the support sleeve 26. A synchronous moving mechanism cooperating with the two calibration columns 27 is mounted on the support sleeve 26. The pressing mechanism includes a first hydraulic telescopic rod 25 fixedly installed on the calibration frame 18. The telescopic end of the first hydraulic telescopic rod 25 is fixedly connected to a pressing frame 24, and the sliding seat 19 is in contact with the pressing frame 24. The synchronous moving mechanism includes guide posts 31 fixedly installed on both sides of the calibration column 27. The inner wall of the support sleeve 26 has four first rectangular holes 30, and the guide posts 31 pass through the corresponding first rectangular holes 30. The sides of the two calibration columns 27 that are close to each other have grooves 28. The support sleeve 26 has a compression spring 29. Both ends are located in two grooves 28, and the two ends of the compression spring 29 are fixedly connected to the inner walls of the two grooves 28 respectively. Slide rails 33 are fixedly connected to both sides of the sliding seat 19. Side plates 32 are slidably sleeved on the outside of the slide rails 33. Two second rectangular holes 34 are opened on the side plates 32, and guide posts 31 pass through the corresponding second rectangular holes 34. Adjacent side plates 32 are connected by clamping members. The clamping members include positioning blocks 35 fixedly installed on the opposite side of the two side plates 32. Clamping plates 36 are sleeved on the outside of the positioning blocks 35. One of the clamping plates... Two fourth lead screws 37 are fixedly connected to the 36, and the fourth lead screw 37 passes through another corresponding clamping plate 36. A fifth nut 38 is sleeved on the outside of the fourth lead screw 37. The positioner includes a movable ring 20 set above the support column 2. Three third lead screws 21 are fixedly connected to the movable ring 20. The third lead screws 21 pass through the movable seat 3, and a fourth nut 22 is sleeved on the end of the third lead screw 21 away from the movable ring 20. A positioning hole 23 is opened on the swing arm 5 to cooperate with the third lead screw 21, and one of the third lead screws 21 passes through the corresponding positioning hole 23. The compression spring 29 is initially in a compressed state, applying pressure to the two correction columns 27 to make the guide column 31 contact the inner wall of the first rectangular hole 30. When the top of the control group pipe contactes the synchronous frame 6, the operator drives the fourth nut 22 to rotate, causing the fourth nut 22 to disengage from the third lead screw 21, releasing the restriction on the position of the third lead screw 21. The operator then drives the movable ring 20 and the third lead screw 21 to disengage from the movable seat 3, and the third lead screw 21 to disengage from the positioning hole 23, releasing the restriction on the position of the swing arm 5. The operator then drives the swing arm 5 to rotate relative to the movable seat 3, and the swing arm 5 drives the correction frame 18 and the correction column 27 to rotate above the control group pipe. The bottom end of the correction column 27 located below contacts the top end of the control group pipe. According to the shape of the top of the control group pipe fitting, the lower correction column 27 slides relative to the support sleeve 26. The lower correction column 27 drives the corresponding guide column 31 to move vertically synchronously. The guide column 31 slides in the second rectangular hole 34. The guide column 31 pushes the side plate 32 to slide relative to the slide rail 33 and the sliding seat 19. Another second rectangular hole 34 on the side plate 32 pushes the upper guide column 31 to slide vertically, so that the two correction columns 27 move vertically synchronously in opposite directions. Finally, the swing arm 5 is in a horizontal state. The operator drives the movable ring 20 and the third screw 21 to move. The third screw 21 passes through the movable seat 3 and the corresponding positioning hole 23 to position the swing arm 5. At this time, the operator drives the fifth nut 38 to rotate relative to the fourth screw 37. Five nuts 38 press the clamping plate 36, so that the two adjacent clamping plates 36 apply pressure to the two side plates 32, so that the side plates 32 are fixed relative to the slide rail 33 and the sliding seat 19, thereby fixing the correction column 27 relative to the support sleeve 26. At this time, the operator drives the movable ring 20 and the third lead screw 21 to slide, so that the third lead screw 21 disengages from the positioning hole 23, and the position restriction of the swing arm 5 is released again. The operator drives the swing arm 5 to rotate in the opposite direction relative to the movable seat 3, so that the correction column 27 moves above the pipe to be welded. The operator drives the pipe to be welded and the three-jaw chuck 7 to rotate relative to the welding table 1. When the placement of the end shape of the pipe to be welded is symmetrical with the placement of the end shape of the control group pipe, the swing arm 5 can be in a horizontal state again. At this time, the operator drives the swing arm 5 to rotate. The movable ring 20 and the third lead screw 21 move, and the corresponding third lead screw 21 can pass through the positioning hole 23. At this time, the position of the pipe to be welded can be corrected. The operator drives the swing arm 5 to rotate relative to the movable seat 3 to the initial position again to avoid the correction column 27 and the correction frame 18 interfering with the two pipes to be welded. The operator can then connect the two pipes to be welded and start the welding work. The operator drives the sliding seat 19 to slide relative to the correction frame 18 to adjust the position of the correction column 27 relative to the correction frame 18, so that pipes of different diameters can be corrected. Then, the first hydraulic telescopic rod 25 drives the pressing frame 24 to move. The pressing frame 24 presses the sliding seat 19, so that the sliding seat 19 is fixed relative to the pressing frame 24 and the correction frame 18.

[0025] Example 4, based on Example 1, is... Figure 1 , Figure 13 and Figure 14 The drive assembly includes a lifting housing 39 positioned above the welding table 1, with a three-jaw chuck 7 located above the lifting housing 39. Several second hydraulic telescopic rods 40 are fixedly connected to the welding table 1, with their telescopic ends fixedly connected to the lifting housing 39. A first rotating shaft 41 is fixedly connected to the bottom end of the three-jaw chuck 7, and the first rotating shaft 41 is rotatably connected to the lifting housing 39. Two second rotating shafts 42 are rotatably connected inside the lifting housing 39, with synchronizers cooperating with the first rotating shafts 41 mounted at their top ends. A worm gear 46 is rotatably connected to the lowering shell 39, and a servo motor 47 is fixedly connected to the lifting shell 39. The output end of the servo motor 47 is fixedly connected to the worm gear 46. A worm wheel 45 that meshes with the worm gear 46 is fixedly sleeved on the outside of the second rotating shaft 42. The teeth on the two worm wheels 45 are inclined in opposite directions. The synchronizer includes a first synchronizer wheel 43 fixedly installed at the top of the second rotating shaft 42. A second synchronizer wheel 44 is fixedly connected to the bottom end of the first rotating shaft 41, and the bottom of the second synchronizer wheel 44 is in contact with the top of the first synchronizer wheel 43. The lifting shell 39 is moved vertically by the second hydraulic telescopic rod 40, which adjusts the initial height of the two three-jaw chucks 7. When it is necessary to drive the control group pipe or the pipe to be welded to rotate relative to the welding table 1, the operator drives the corresponding three-jaw chuck 7 to rotate relative to the lifting shell 39. The three-jaw chuck 7 drives the first rotating shaft 41 and the corresponding second synchronous wheel 44 to rotate. The second synchronous wheel 44 rotates relative to the first synchronous wheel 43. When the position of the control group pipe or the pipe to be welded is adjusted, the worm gear 46 is driven to rotate by the servo motor 47. The worm gear 46 drives the two worm wheels 45 to rotate in opposite directions. The worm wheels 45 can then drive the first synchronous wheel 43 to rotate through the second rotating shaft 42. The first synchronous wheel 43 drives the second synchronous wheel 44, the first rotating shaft 41 and the three-jaw chuck 7 to rotate synchronously through friction, so that the control group pipe and the pipe to be welded can rotate synchronously in opposite directions.

[0026] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.

Claims

1. A welding device for processing handcart parts, comprising a welding table (1) and a support column (2) fixedly installed on the top of the welding table (1), characterized in that, The support column (2) is provided with a movable seat (3) above it, and an elastic unit that cooperates with the movable seat (3) is installed on the support column (2); An arc welding gun (4) is inserted through the movable seat (3). A locking component that cooperates with the movable seat (3) is installed on the arc welding gun (4). A synchronization frame (6) for contacting the end of the control group pipe is provided above the support column (2). A translation mechanism that cooperates with the synchronization frame (6) is installed on the movable seat (3). A correction structure for correcting the position of the pipe to be welded is installed on the movable seat (3). Two three-jaw chucks (7) are provided above the welding table (1). A drive assembly for driving the three-jaw chucks (7) to rotate and lift is installed on the welding table (1).

2. The welding device for processing handcart parts according to claim 1, characterized in that, The elastic unit includes a tension spring (8) disposed below the movable seat (3), a groove (9) is provided on the top of the support column (2), the bottom end of the movable seat (3) is slidably installed in the groove (9), and the two ends of the tension spring (8) are fixedly connected to the bottom of the movable seat (3) and the bottom of the inner wall of the groove (9) respectively. At least one first lead screw (10) passes through the support column (2), and the first lead screw (10) passes through the movable seat (3). The two ends of the first lead screw (10) are respectively fitted with first nuts (11), and two adjacent first nuts (11) are in contact with the two sides of the support column (2) respectively.

3. The welding apparatus for processing handcart parts according to claim 1, characterized in that, The translation mechanism includes a rectangular ring (12) fixedly installed on the synchronous frame (6). The rectangular ring (12) passes through the movable seat (3). Support parts (13) are fixedly connected to both sides of the movable seat (3). A second lead screw (14) is fixedly connected to the support part (13). The rectangular ring (12) is sleeved on the outside of the second lead screw (14). A second nut (15) is sleeved on the end of the second lead screw (14) away from the support part (13). The second nut (15) is in contact with the rectangular ring (12).

4. The welding apparatus for processing handcart parts according to claim 1, characterized in that, The locking component includes a threaded sleeve (16) fixedly sleeved on the outside of the arc welding gun (4), and two third nuts (17) are sleeved on the outside of the threaded sleeve (16), and the two third nuts (17) respectively contact the two sides of the movable seat (3).

5. The welding apparatus for processing handcart parts according to claim 1, characterized in that, The correction structure includes a swing arm (5) rotatably mounted on a movable seat (3). A locator for positioning the swing arm (5) is installed on the movable seat (3). A correction frame (18) is fixedly connected to the end of the swing arm (5) away from the movable seat (3). Several sliding seats (19) are provided on the outer side of the correction frame (18). A pressing mechanism that cooperates with the sliding seats (19) is installed on the correction frame (18). A support sleeve (26) is fixedly connected to the end of the sliding seat (19) away from the correction frame (18). Two correction columns (27) are slidably provided inside the support sleeve (26). A synchronous moving mechanism that cooperates with the two correction columns (27) is installed on the support sleeve (26).

6. The welding apparatus for processing handcart parts according to claim 5, characterized in that, The pressing mechanism includes a first hydraulic telescopic rod (25) fixedly installed on the calibration frame (18), and the telescopic end of the first hydraulic telescopic rod (25) is fixedly connected to the pressing frame (24), and the sliding seat (19) and the pressing frame (24) are in contact.

7. The welding apparatus for processing handcart parts according to claim 5, characterized in that, The synchronous moving mechanism includes guide columns (31) fixedly installed on both sides of the correction column (27). The inner wall of the support sleeve (26) is provided with four first rectangular holes (30), and the guide columns (31) pass through the corresponding first rectangular holes (30). The two correction columns (27) are respectively provided with grooves (28) on the side that are close to each other. The support sleeve (26) is provided with compression springs (29). The two ends of the compression springs (29) are respectively located in the two grooves (28), and the two ends of the compression springs (29) are respectively fixedly connected to the inner walls of the two grooves (28). The two sides of the sliding seat (19) are respectively fixedly connected with slide rails (33). The slide rails (33) are slidably sleeved with side plates (32). The side plates (32) are provided with two second rectangular holes (34), and the guide columns (31) pass through the corresponding second rectangular holes (34). The two adjacent side plates (32) are connected by clamping members.

8. The welding apparatus for processing handcart parts according to claim 7, characterized in that, The clamping component includes positioning blocks (35) fixedly installed on the opposite side of the two side plates (32). The positioning blocks (35) are fitted with clamping plates (36). Two fourth screws (37) are fixedly connected to one of the clamping plates (36), and the fourth screws (37) pass through the other corresponding clamping plate (36). The fourth screws (37) are fitted with fifth nuts (38).

9. The welding apparatus for processing handcart parts according to claim 5, characterized in that, The positioner includes a movable ring (20) set above the support column (2), and three third screws (21) are fixedly connected to the movable ring (20). The third screws (21) pass through the movable seat (3), and a fourth nut (22) is sleeved on the end of the third screw (21) away from the movable ring (20). The swing arm (5) is provided with a positioning hole (23) that cooperates with the third screw (21), and one of the third screws (21) passes through the corresponding positioning hole (23).

10. The welding apparatus for processing handcart parts according to claim 1, characterized in that, The drive assembly includes a lifting housing (39) disposed above the welding table (1), and a three-jaw chuck (7) located above the lifting housing (39). Several second hydraulic telescopic rods (40) are fixedly connected to the welding table (1). The telescopic ends of the second hydraulic telescopic rods (40) are fixedly connected to the lifting housing (39). A first rotating shaft (41) is fixedly connected to the bottom end of the three-jaw chuck (7). The first rotating shaft (41) is rotatably connected to the lifting housing (39). A rotatably connected component is located inside the lifting housing (39). Two second rotating shafts (42) are provided. The top of the second rotating shaft (42) is equipped with a synchronizer that cooperates with the first rotating shaft (41). A worm gear (46) is rotatably connected to the lifting housing (39). A servo motor (47) is fixedly connected to the lifting housing (39), and the output end of the servo motor (47) is fixedly connected to the worm gear (46). A worm wheel (45) that meshes with the worm gear (46) is fixedly sleeved on the outside of the second rotating shaft (42), and the teeth on the two worm wheels (45) are inclined in opposite directions.

11. The welding apparatus for processing handcart parts according to claim 10, characterized in that, The synchronizer includes a first synchronizer wheel (43) fixedly installed at the top of the second rotating shaft (42), and a second synchronizer wheel (44) fixedly connected to the bottom of the first rotating shaft (41), with the bottom of the second synchronizer wheel (44) and the top of the first synchronizer wheel (43) in contact.

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