Pipe fitting welding station, pipe fitting production method and center pipe and five-way pipe welding assembly

Abstract

The present invention relates to the field of welding engineering technology, and specifically discloses a pipe welding station, a pipe production method, and a center pipe and five-way pipe welding assembly. A plurality of clamps are arranged on a rotary seat. The rotary seat is rotated to make at least one clamp face the welding robot, so that while the welding robot is welding, other clamps can be loaded and unloaded, thereby improving production efficiency. The clamp is in a vertical state on the rotary seat, so that the state of the pipe to be welded during the welding process is consistent with the posture during use, and the precision of the finished product after welding is improved. At the same time, robots are used to replace manual welding, and the welding quality and precision are improved with good stability.

Description

Technical Field

[0001] The present invention relates to the technical field of welding engineering, in particular to a pipe welding station, a pipe production method and a center pipe and five-way pipe welding assembly. Background Art

[0002] The center tube and bottom bracket of a bicycle are typically connected by welding. Existing welding operations typically involve manual welding using a horizontal fixture. However, the center tube and bottom bracket are assembled vertically on a bicycle. Welding on a horizontal fixture results in poor positioning and welding accuracy, which also reduces the precision of the finished welded part, failing to meet the required vertical precision. Furthermore, manual welding is difficult to control, resulting in a low yield rate for finished parts. Furthermore, manual welding is inefficient, creating a bottleneck for increasing production capacity. Summary of the Invention

[0003] The object of the present invention is to provide a pipe welding station, a pipe production method and a center pipe and five-way pipe welding assembly to solve the problems of poor precision of finished parts after welding and low welding efficiency in the prior art.

[0004] The present invention provides a pipe welding station, comprising a welding robot capable of welding along a preset trajectory, and a workbench, wherein a base and a swivel seat are provided at intervals on the workbench, wherein the base is used to mount the welding robot, and a plurality of fixtures are provided on the swivel seat, wherein the swivel seat is capable of rotating relative to the workbench so that at least one of the fixtures faces the welding robot;

[0005] The clamp is provided with a connecting assembly, a column, a pressing assembly, a clamping device and a positioning device, the connecting assembly is used to be fixedly connected to the swivel seat, the connecting assembly is provided with an adjusting plate, the adjusting plate is rotatably arranged at the lower end of the column, the column extends in a vertical direction, the pressing assembly and the clamping device are both installed on the column, the clamping device is used to support the pipe to be welded, the pressing assembly is used to limit the movement of the pipe to be welded relative to the column, the positioning device is slidably connected to the column, and a positioning piece is detachably provided on the positioning device, the positioning piece is provided with a positioning surface matching the pipe to be welded, and the positioning piece is used to position the pipe to be welded.

[0006] As an optimal technical solution for the pipe welding station, a first slide rail, a second slide rail and a third slide rail are fixedly connected to the body of the column, the second slide rail and the third slide rail are located on both sides of the column, the first slide rail is arranged adjacent to the second slide rail and the third slide rail, the positioning device includes a first positioning assembly, the first positioning assembly includes a first frame, a first slider and a second slider are fixedly connected to the inside of the first frame, the first slider and the second slider are respectively slidably connected to the second slide rail and the third slide rail, the positioning member includes a first positioning block, the first positioning block is detachably connected to the first frame, and the first positioning block is provided with a positioning surface matching the pipe to be welded.

[0007] As an optimal technical solution for the pipe welding station, the positioning device also includes a second positioning assembly, the second positioning assembly includes a second frame and a third slider, a fourth slide rail is fixedly connected to the inside of the second frame, one end of the third slider is slidably connected to the fourth slide rail, and the other end of the third slider is slidably connected to the first slide rail, and the extension direction of the fourth slide rail is perpendicular to the extension direction of the column. The positioning member also includes a second positioning block, which is fixedly connected to the second frame, and the second positioning block is used to fit the pipe to be welded.

[0008] As an optimal technical solution for the pipe welding station, the positioning device also includes a lower positioning assembly, which includes an adjusting arm, a positioning shaft and a positioning pin. The adjusting arm is rotatably connected to the lower end of the column, and the positioning shaft is fixedly connected to the adjusting arm. The positioning pin is installed on the positioning shaft, and the positioning pin is used to cooperate with the positioning hole of the pipe to be welded.

[0009] As an optimal technical solution for the pipe welding station, the clamping device includes a supporting assembly, which includes a core shaft, a sleeve and a fixed block. The sleeve is sleeved outside the core shaft, the sleeve is fixedly connected to the fixed block, and the fixed block is fixedly connected to the lower end of the column. The sleeve is used to pass through the lower end of the pipe to be welded. The downward pressure assembly includes a downward pressure drive, a third frame and a downward pressure shaft. The downward pressure drive is arranged at the upper end of the column and can slide along the length direction of the column. The output shaft of the downward pressure drive is connected to the third frame and can drive the third frame to slide along the length direction of the column. The downward pressure shaft is fixedly connected to the end of the third frame away from the downward pressure drive, and the downward pressure shaft can abut the top end of the pipe to be welded.

[0010] As an optimal technical solution for the pipe welding station, the support assembly also includes an intermediate disk and a movable sleeve. The intermediate disk is arranged between the shaft sleeve and the fixed block. The intermediate disk and the shaft sleeve are integrated into one. The movable sleeve is arranged on the shaft sleeve and can slide along the axial direction of the shaft sleeve. An operating shaft is slidably provided on the intermediate disk, and the operating shaft is used to limit the sliding of the movable sleeve on the shaft sleeve.

[0011] As an optimal technical solution for the pipe welding station, the clamping device also includes a clamping assembly, which includes an adjusting shaft and a clamping member, the adjusting shaft and the clamping member are hingedly connected via a hinge shaft, the adjusting shaft is connected to the core shaft, and the core shaft can slide along the axial direction of the sleeve, the support assembly also includes a guide rod, the guide rod is fixedly arranged in the sleeve and arranged parallel to the core shaft, and a reversing block is provided on the clamping member, the reversing block is used to contact one end of the guide rod and cause the clamping member to rotate around the hinge shaft along the first rotation direction.

[0012] As an optimal technical solution for the pipe welding station, the clamping assembly also includes a tension spring, one end of which is fixedly connected to the adjusting shaft, and the other end of the tension spring passes through the clamping member. The tension spring is used to make the clamping member rotate around the hinge axis along a second rotation direction, and the first rotation direction is opposite to the second rotation direction.

[0013] The present invention provides a pipe fitting production method, which is applied to the pipe fitting welding station of any of the above solutions, and the pipe fitting production method comprises:

[0014] S1. Loading multiple fixtures;

[0015] S2. The rotary seat rotates continuously at a preset time interval so that at least one loaded fixture faces the welding robot in turn;

[0016] S3. Continue welding the pipe fittings to be welded on the loaded fixture, and continue unloading and reloading the welded fixture.

[0017] The present invention provides a center pipe and five-way pipe welding assembly, which is welded using the pipe welding station of the above solution, or produced using the pipe production method of the above solution.

[0018] The beneficial effects of the present invention are:

[0019] The present invention provides a pipe welding station, in which a plurality of clamps are arranged on a rotary seat. The rotary seat is rotated to make at least one clamp face the welding robot, so that while the welding robot is welding, other clamps can be loaded and unloaded, thereby improving production efficiency. In addition, the clamp is in a vertical state on the rotary seat, so that the state of the pipe to be welded during the welding process is consistent with the posture during use, and the precision of the finished product after welding is improved. At the same time, the robot is used to replace manual welding, and the welding quality and precision are improved with good stability.

[0020] The present invention provides a pipe fitting production method, which can realize continuous welding operation and improve production efficiency.

[0021] The present invention provides a center pipe and five-way pipe welding assembly, which is welded using the pipe welding station of the present invention, and the welding quality and welding precision of the finished product after welding are higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural diagram of a pipe welding station in an embodiment of the present invention;

[0023] Figure 2 A schematic structural diagram of a clamp according to an embodiment of the present invention;

[0024] Figure 3 This is a structural diagram of a clamp in an embodiment of the present invention with the connecting components hidden;

[0025] Figure 4 This is a structural diagram of the clamp in an embodiment of the present invention, with the connecting component and the lower positioning component hidden;

[0026] Figure 5 Schematic diagram of the structure of the lower positioning assembly in an embodiment of the present invention;

[0027] Figure 6 is a cross-sectional view of a lower positioning assembly according to an embodiment of the present invention;

[0028] Figure 7 is a cross-sectional view of a column in an embodiment of the present invention;

[0029] Figure 8 Schematic diagram of the structure of the first positioning assembly in an embodiment of the present invention;

[0030] Figure 9 is a cross-sectional view of a first positioning assembly according to an embodiment of the present invention;

[0031] Figure 10 Schematic diagram of the structure of the second positioning assembly in an embodiment of the present invention;

[0032] Figure 11 This is one of the structural diagrams of the pressing assembly in an embodiment of the present invention;

[0033] Figure 12 This is the second structural diagram of the pressing assembly in the embodiment of the present invention;

[0034] Figure 13 Schematic diagram of the structure of the support assembly and the clamping assembly in an embodiment of the present invention;

[0035] Figure 14 is a cross-sectional view of a support assembly and a clamping assembly in an embodiment of the present invention;

[0036] Figure 15 This is a schematic structural diagram of the movable sleeve in an embodiment of the present invention;

[0037] Figure 16 This is a schematic structural diagram of a support assembly in an embodiment of the present invention;

[0038] Figure 17 This is a structural diagram of the support assembly in an embodiment of the present invention, with the guide rod and the limit block hidden;

[0039] Figure 18 is a cross-sectional view of the intermediate plate and the limiting block in an embodiment of the present invention;

[0040] Figure 19 is one of the cross-sectional views of the clamping assembly according to an embodiment of the present invention;

[0041] Figure 20 This is the second cross-sectional view of the clamping assembly in the embodiment of the present invention.

[0042] In the picture:

[0043] 10, five-way pipe; 20, middle pipe; 100, workbench; 110, foundation; 120, swivel seat; 200, fixture;

[0044] 1. Connecting assembly; 11. Base plate; 12. Adjustment plate; 121. Pin hole; 122. First adjustment hole;

[0045] 2. Column; 21. Main body; 22. First slide rail; 23. Second slide rail; 24. Third slide rail;

[0046] 3. Support assembly; 31. Clamping drive member; 311. Mandrel; 32. Mounting plate; 321. Second adjustment hole; 33. Fixed block; 34. Intermediate plate; 341. Extension block; 342. Accommodating groove; 343. Limiting hole; 344. First accommodating hole; 351. Operating shaft; 352. First spring; 361. Limiting block; 3611. Open end; 3612. Second accommodating hole; 362. Limiting bolt; 363. Second spring; 37. Bushing; 371. Through hole; 38. Guide rod; 381. Annular groove; 39. Movable sleeve; 391. Connecting ear; 3911. Limiting groove; 3912. U-shaped groove;

[0047] 4. Clamping assembly; 41. Adjusting shaft; 411. First screw hole; 412. Second screw hole; 413. Third receiving hole; 414. First hinge; 42. Clamping member; 421. Second hinge; 422. Reversing block; 423. Matching hole; 43. Tension spring; 44. Articulated shaft;

[0048] 5. Lower positioning assembly; 51. Adjusting arm; 52. Positioning shaft; 53. Positioning pin; 54. Third spring;

[0049] 6. First positioning assembly; 61. First frame; 62. First slider; 63. Second slider; 64. First positioning block; 65. Extension arm; 66. Mounting seat; 67. Manual clamp;

[0050] 7. Second positioning assembly; 71. Second frame; 72. Fourth slide rail; 73. Third slider; 74. Extension arm; 75. Second positioning block;

[0051] 8. Pressing assembly; 81. Third frame; 82. Pressing drive member; 83. Drive plate; 84. Fourth slider; 85. Fifth slider; 86. Pressing head; 87. Pressing shaft; 871. Positioning protrusion. DETAILED DESCRIPTION

[0052] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0053] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0054] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0055] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0056] like Figures 1-20As shown, the present invention provides a pipe welding station, including a welding robot, which can weld along a preset trajectory. The structure of the welding robot and the related methods for making the welding robot weld along the preset trajectory are prior art in the field and will not be described in detail here. The pipe welding station also includes a workbench 100, on which a base 110 and a swivel seat 120 are spaced apart. The base 110 is used to install the welding robot, so that the relative position relationship between the robot and the swivel seat 120 is determined and unchanged. A plurality of fixtures 200 are provided on the swivel seat 120, and the swivel seat 120 can rotate relative to the workbench 100 so that at least one fixture 200 faces the welding robot, so that while the welding robot is welding, other fixtures 200 can be loaded and unloaded, thereby improving production efficiency. At the same time, the relative position relationship between the welding robot and the fixture 200 remains unchanged, ultimately achieving high quality and precision of the finished product after welding, and high consistency in quality and precision. The clamp 200 is provided with a connecting component 1, a column 2, a pressing component 8, a clamping device and a positioning device. The connecting component 1 is used to be fixedly connected to the swivel seat 120. The connecting component 1 is provided with an adjustment plate 12. The adjustment plate 12 is rotatably set at the lower end of the column 2. The column 2 extends in the vertical direction. The pressing component 8 and the clamping device are both installed on the column 2. The clamping device is used to support the pipe to be welded, and the pressing component 8 is used to limit the movement of the pipe to be welded relative to the column 2. The positioning device is slidably connected to the column 2. The positioning device is detachably provided with a positioning member. The positioning member is provided with a positioning surface that matches the pipe to be welded, and the positioning member is used to position the pipe to be welded. The pipe to be welded in this embodiment is a five-way pipe 10 and a middle pipe 20. The five-way pipe 10 is perpendicular to the axis of the middle pipe 20, and the five-way pipe 10 is welded to the lower end of the middle pipe 20. The clamping device supports the bottom bracket tube 10, the pressing assembly 8 compresses the center tube 20 and the bottom bracket tube 10, and the positioning device positions the bottom bracket tube 10 and the center tube 20, thereby preventing the overlap joint of the bottom bracket tube 10 and the center tube 20 from shifting and ensuring welding quality. The fixture 200 in this embodiment is positioned vertically on the rotating seat 120, ensuring that the state of the pipe to be welded during welding is consistent with the posture during use. This improves the precision of the finished welded part. Furthermore, the use of robots instead of manual welding improves welding quality and precision, and improves stability.

[0057] For details, please refer to Figure 1-Figure 2As shown, the connection assembly 1 is further provided with a base plate 11, which is used to be fixedly connected to the swivel seat 120 of the workbench 100. The base plate 11 is perpendicular to and fixedly connected to the adjustment plate 12. The adjustment plate 12 is connected to the column 2 via the fixed block 33 of the support assembly 3. The column 2 is fixedly connected to the fixed block 33. The adjustment plate 12 is provided with a pin hole 121 and a first adjustment hole 122. The first adjustment hole 122 is an arc-shaped hole. The adjustment plate 12 can rotate relative to the fixed block 33 about the axis of the pin hole 121. A fastener passes through the first adjustment hole 122 to securely connect the adjustment plate 12 to the fixed block 33. Because the base plate 11 is fixedly connected to the swivel seat 120, the angle between the column 2 and the vertical direction is changed by rotating the adjustment plate 12 relative to the fixed block 33, so that the posture of the bottom bracket 10 and the center tube 20 on the fixture 200 is consistent with the posture when installed on the bicycle.

[0058] Furthermore, if Figure 3-Figure 4 , and combined with Figure 7-12 As shown, the column 2 includes a body 21 and a first slide rail 22, a second slide rail 23, and a third slide rail 24 arranged along the length of the column 2. That is, the first slide rail 22, the second slide rail 23, and the third slide rail 24 are fixedly connected to the body 21 of the column 2. The second slide rail 23 and the third slide rail 24 are located on both sides of the body 21 of the column 2, and the first slide rail 22 is arranged adjacent to the second slide rail 23 and the third slide rail 24. The body 21 of the column 2 is a rectangular strip structure, three side surfaces of which correspond one-to-one with the first slide rail 22, the second slide rail 23, and the third slide rail 24, and the other side surface corresponds to the middle tube 20. The length direction of the first slide rail 22, the second slide rail 23, and the third slide rail 24 is consistent with the length direction of the column 2.

[0059] Specifically, the positioning device includes a first positioning component 6, a second positioning component 7 and a lower positioning component 5, and the corresponding positioning members include a first positioning block 64 of the first positioning component 6 and a second positioning block 75 of the second positioning component 7. Figure 8-Figure 9As shown, a plurality of first positioning assemblies 6 are provided, spaced apart along the length of the column 2. The first positioning assembly 6 comprises a first frame 61, to which a first slider 62 and a second slider 63 are fixedly connected. The first slider 62 and the second slider 63 are slidably connected to the second slide rail 23 and the third slide rail 24, respectively. Corresponding locking screws are provided on the first positioning assembly 6. When the first positioning assembly 6 is slid into place, the first slider 62 and the second slider 63 are locked to the second slide rail 23 and the third slide rail 24, respectively. A first positioning block 64 is detachably connected to the frame and has a positioning surface that mates with the pipe to be welded. In this embodiment, the first positioning block 64 is used to position the center tube 20, i.e., the first positioning block 64 has a positioning surface that mates with the center tube 20. The first frame 61 has a U-shaped structure, and the first slider 62 and the second slider 63 are provided on the two inner sidewalls of the first frame 61. The first positioning block 64 is fixedly connected to the side of the first frame 61 facing away from the U-shaped opening to mate with and position the center tube 20. When switching to a different specification of the middle tube 20, it is only necessary to disassemble and replace the corresponding first positioning block 64, thereby improving the applicable scene of the clamp 200. In addition, please refer to Figure 3 Combined with Figure 8 As shown, the first positioning assembly 6 can also be provided with an extension arm 65, a mounting seat 66 and a quick clamp 67. The extension arm 65 is fixedly connected to the first frame 61 and extends upward or downward along the length direction of the column 2. The mounting seat 66 is fixedly connected to the end of the extension arm 65 away from the first frame 61. The quick clamp 67 is installed on the mounting seat 66. The quick clamp 67 is used to press the middle tube 20 onto the first positioning block 64, thereby preventing the middle tube 20 from radially escaping from the first positioning block 64 and ensuring positioning accuracy.

[0060] Please refer to Figure 10As shown, the second positioning assembly 7 is located below the first positioning assembly 6. The second positioning assembly 7 includes a second frame 71 and a third slider 73. The second frame 71 is also configured as a U-shaped structure. A fourth slide rail 72 is fixedly connected to the interior of the second frame 71. One end of the third slider 73 is slidably connected to the fourth slide rail 72, and the other end of the third slider 73 is slidably connected to the first slide rail 22. The third slider 73 is locked to the first slide rail 22 by a locking screw. The extension direction of the fourth slide rail 72 is perpendicular to the extension direction of the column 2, that is, the sliding direction of the third slider 73 on the first slide rail 22 is perpendicular to the sliding direction of the third slider 73 on the fourth slide rail 72. The second positioning assembly 7 also includes an extension arm 74. The second positioning block 75 is fixedly connected to the second frame 71 via the extension arm 74. The second positioning block 75 is used to fit the pipe to be welded. In this embodiment, the second positioning block 75 is used to position the center tube 20. The second positioning block 75 and the center tube 20 are positioned near the lap joint between the center tube 20 and the bottom bracket 10. Therefore, an extension arm 65 is provided to securely connect the second positioning block 75 to the second frame 71, providing space for the welding robot to move and preventing interference. By providing a fourth slide rail 72 that slidably engages with a third slider 73, the second frame 71 can slide perpendicular to the column 2, allowing the second positioning block 75 to accommodate center tubes 20 of varying thicknesses. Adjustment bolts (not shown) are threadedly connected at each end of the second frame 71. These two adjustment bolts are positioned opposite each other and abut against the third slider 73. To adjust the second frame 71's sliding direction perpendicular to the column 2, simply loosen one adjustment bolt and tighten the other simultaneously to change the position of the second frame 71 and achieve locking. The second positioning assembly 7 positions the lap joint between the center tube 20 and the bottom bracket 10, further ensuring the precision of the finished welded part.

[0061] like Figure 3 、 Figure 5 and Figure 6As shown, the lower positioning assembly 5 includes an adjustment arm 51, a positioning shaft 52, and a positioning pin 53. The adjustment arm 51 is rotatably connected to the lower end of the column 2, and the positioning shaft 52 is fixedly connected to the adjustment arm 51. The positioning pin 53 is mounted on the positioning shaft 52 and is configured to engage with the positioning hole of the pipe to be welded. In this embodiment, the positioning pin 53 is configured to engage with the positioning hole on the bottom bracket 10. The positioning pin 53 extends radially along the positioning shaft 52. The positioning shaft 52 is provided with a corresponding groove for accommodating the positioning pin 53. A third spring 54 is also provided between the positioning pin 53 and the positioning shaft 52. The two ends of the third spring 54 respectively abut the positioning pin 53 and the positioning shaft 52, thereby enabling the positioning pin 53 to extend and retract radially along the positioning shaft 52 to position the bottom bracket 10 during the loading process. The adjustment arm 51 is connected to the column 2 via the mounting plate 32 of the support assembly 3. The mounting plate 32 is fixedly connected to the fixing block 33, which is fixedly connected to the body 21 of the column 2. An arc-shaped second adjustment hole 321 is provided on the mounting plate 32, and a fastener passes through the second adjustment hole 321 and is fixedly connected to the adjustment arm 51, so that the adjustment arm 51 can rotate relative to the mounting plate 32. The axis of rotation of the adjustment arm 51 relative to the mounting plate 32 is the axis of the bottom bracket tube 10, so that the locating pin 53 can rotate circumferentially along the bottom bracket tube 10, while the axis of the locating pin 53 is always along the radial direction of the bottom bracket tube 10, so as to achieve cooperation with the locating holes at different positions of the bottom bracket tube 10.

[0062] Furthermore, if Figure 3 As shown, combined with Figure 10-20 The clamping device includes a clamping assembly 4 and a support assembly 3. The support assembly 3 includes a core shaft 311, a sleeve 37 and a fixed block 33. The sleeve 37 is sleeved on the outside of the core shaft 311. The sleeve 37 is fixedly connected to the fixed block 33. The fixed block 33 is fixedly connected to the lower end of the column 2. The sleeve 37 is used to pass through the lower end of the pipe to be welded. In this embodiment, the sleeve 37 is used to pass through the bottom tube 10, so that the sleeve 37 provides support for the bottom tube 10 and the middle tube 20. The pressing assembly 8 includes a pressing drive 82, a third frame 81 and a pressing shaft 87. The pressing drive 82 is arranged at the upper end of the column 2 and can slide along the length direction of the column 2. The output shaft of the pressing drive 82 is connected to the third frame 81 and can drive the third frame 81 to slide along the length direction of the column 2. The down-pressing shaft 87 is fixedly connected to one end of the third frame 81 away from the down-pressing driving member 82. The down-pressing shaft 87 can abut against the top of the pipe to be welded. In this embodiment, the down-pressing shaft 87 abuts against the top of the middle tube 20, so that through the support of the sleeve 37 and the tightening of the down-pressing assembly 8, the middle tube 20 and the five-way tube 10 are more tightly overlapped, thereby ensuring the quality and precision after welding.

[0063] like Figure 11-12As shown, the pressing assembly 8 also includes a drive plate 83, a fourth slider 84, a fifth slider 85 and a pressing head 86. The third frame 81 is a U-shaped structure, and the fourth slider 84 and the fifth slider 85 are fixedly connected on both sides of the interior of the third frame 81. The fourth slider 84 and the fifth slider 85 are slidably engaged with the second slide rail 23 and the third slide rail 24 respectively. The pressing head 86 is fixedly connected to the third frame 81 and extends in a direction away from the opening of the third frame 81. The pressing shaft 87 is installed at the bottom of the pressing head 86. A positioning protrusion 871 is radially protruded on the pressing shaft 87. The positioning protrusion 871 is used to cooperate with the notch at the top of the middle tube 20 to achieve positioning of the middle tube 20 and prevent the middle tube 20 from rotating along its own axis during welding. The downward driving member 82 is slidably engaged with the first slide rail 22 and is locked by a locking screw. The output end of the downward driving member 82 is fixedly connected to a driving plate 83, which is fixedly connected to the third frame 81. Driven by the downward driving member 82, the third frame 81 can move up and down along the column 2 to tighten or loosen the centering tube 20. The downward driving member 82 can be a telescopic cylinder or a linear motor. In this embodiment, the downward driving member 82 is preferably a telescopic cylinder.

[0064] like Figures 13-20As shown, the support assembly 3 also includes a clamping drive 31, an intermediate disk 34, a guide rod 38, and a movable sleeve 39. The clamping assembly 4 includes an adjusting shaft 41, a clamping member 42, a return member, and a hinge shaft 44. The core shaft 311 is slidably coaxially arranged in the sleeve 37. The guide rod 38 is fixedly arranged on the sleeve 37, and the axis of the guide rod 38 is parallel to the axis of the core shaft 311. The clamping drive 31 is used to drive the core shaft 311 to slide in the sleeve 37. The sleeve 37 can penetrate the interior of the pipe to support the pipe. In this embodiment, the pipe is a five-way pipe 10. The intermediate disk 34 is arranged between the sleeve 37 and the fixed block 33. The intermediate disk 34 is fixedly connected to the fixed block 33, and the clamping drive 31 is mounted on the fixed block 33. The intermediate disk 34 is fixedly connected to the sleeve 37 or integrally arranged. In this embodiment, the intermediate disk 34 and the sleeve 37 are preferably integrally arranged. A movable sleeve 39 is mounted on the exterior of the shaft sleeve 37 and is capable of sliding axially along the shaft sleeve 37. When the clamping member 42 clamps the pipe, the movable sleeve 39 abuts against the end of the pipe away from the clamping member 42, thereby limiting the axial position of the pipe. The clamping member 42 is capable of rotating about a first axis relative to the mandrel 311. The first axis extends perpendicularly to the axis of the mandrel 311 and is spaced apart from the axis of the guide rod 38. One side of the clamping member 42 is configured to contact the end of the guide rod 38. The mandrel 311 can drive the clamping member 42 toward or away from the pipe to clamp or release the pipe axially. The provision of the pipe clamping device enables automatic clamping or release of the pipe through the clamping driver 31, eliminating the need for manual clamping or release, thereby improving production efficiency. Furthermore, the pipe and surrounding components generate a high temperature after welding, thus preventing operators from being burned by high temperatures when manually clamping or releasing the pipe.

[0065] Furthermore, if Figure 13-14 , and combined with Figure 19-20As shown, the adjusting shaft 41 is fixedly connected to the core shaft 311, and the adjusting shaft 41 is coaxially arranged with the core shaft 311. In this embodiment, the adjusting shaft 41 is provided with a second screw hole 412, and the core shaft 311 is provided with an external thread. The adjusting shaft 41 is fixedly connected to the external thread of the core shaft 311 through the second screw hole 412. The end of the adjusting shaft 41 away from the core shaft 311 is provided with a first hinge portion 414, and the clamping member 42 is provided with a second hinge portion 421 and a reversing block 422. The first hinge portion 414 and the second hinge portion 421 are hinged by a hinge shaft 44, and the axis of the hinge shaft 44 is the first axis. The reversing block 422 is used to contact the end of the guide rod 38 and rotate the clamping member 42 along the first direction around the hinge shaft 44. The reversing block 422 in this embodiment is spaced apart from the articulation shaft 44. Specifically, the reversing block 422 is spaced apart from the articulation shaft 44 along the radial direction of the articulation shaft 44, and the extension direction of the reversing block 422 is perpendicular to the axial direction of the articulation shaft 44. One end of the reversing block 422 contacts the end of the guide rod 38, and the core shaft 311 drives the adjusting shaft 41 to move. In the process where the first hinge part 414 drives the clamping member 42 to approach the bottom tube 10 through the articulation shaft 44, since the reversing block 422 abuts against the guide rod 38, the second hinge part 421 rotates around the articulation shaft 44 in the first direction. During this process, the reversing block 422 slides relative to the guide rod 38 and always maintains contact, so that the clamping member 42 can contact one end of the bottom tube 10 and clamp the bottom tube 10 to achieve axial limitation.

[0066] It should be noted that the clamping member 42 has a relaxed state and a clamped state. When the clamping member 42 is in the relaxed state, its length is aligned with the axial direction of the bottom bracket shell 10, and its outer dimensions are smaller than the inner diameter of the bottom bracket shell 10. Therefore, during the loading process, the bottom bracket shell 10 can pass through the clamping member 42 in the relaxed state. When the clamping member 42 is in the clamped state, it rotates in a first direction until its length is perpendicular to the axial direction of the bottom bracket shell 10 and the length of the clamping member 42 is greater than the outer diameter of the bottom bracket shell 10, thereby clamping the bottom bracket shell 10.

[0067] Specifically, the return member in this embodiment is a tension spring 43. One end of the tension spring 43 is fixedly connected to the adjustment shaft 41, and the other end of the tension spring 43 passes through the clamping member 42. The tension spring 43 is used to rotate the clamping member 42 about the hinge axis 44 in a second rotational direction, the first rotational direction being opposite to the second rotational direction. The adjustment shaft 41 is also provided with a first threaded hole and a third receiving hole 413 in communication. A portion of the tension spring 43 is located within the third receiving hole 413. A fixing screw is threadedly connected to the first threaded hole, securing one end of the tension spring 43 within the third receiving hole 413. The clamping member 42 is provided with a through-hole 423. The tension spring 43 is adapted to engage the wall of the matching hole 423, and the other end of the tension spring 43 passes through and protrudes from the matching hole 423. When the clamping member 42 is relaxed, the tension spring 43 is free of stress. When the clamping member 42 is clamped, the tension spring 43 undergoes elastic deformation synchronously with the clamping member 42. When the mandrel 311 drives the clamping member 42 via the adjustment shaft 41 toward a direction away from the bottom bracket 10, the clamping member 42 rotates in a second direction about the hinge axis 44 under the elastic force of the tension spring 43 until it returns to a relaxed state. The provision of the tension spring 43 enables the clamping member 42 to automatically return to the relaxed state, facilitating subsequent material loading.

[0068] In other embodiments, the return member may also be a torsion spring. Specifically, a torsion spring is mounted on the hinge shaft 44, with its two torsion spring arms contacting the first hinge portion 414 and the second hinge portion 421, respectively. The torsion spring is used to rotate the clamping member 42 about the hinge shaft 44 in a second rotational direction, the first rotational direction being opposite to the second rotational direction. When the clamping member 42 is in a relaxed state, the torsion spring is unloaded. When the clamping member 42 is in a clamped state, the torsion spring elastically deforms, with the two torsion spring arms contacting the first hinge portion 414 and the second hinge portion 421, respectively. When the mandrel 311 drives the clamping member 42 away from the five-way tube 10 via the adjustment shaft 41, the clamping member 42 rotates about the hinge shaft 44 in the second direction under the elastic force of the torsion spring until it returns to a relaxed state. By providing a torsion spring, the clamping member 42 automatically returns to a relaxed state, facilitating subsequent material loading.

[0069] Furthermore, if Figure 14-18As shown, the shaft sleeve 37 is provided with a through hole 371 for accommodating the guide rod 38, and the intermediate disk 34 is provided with a receiving groove 342 and a limiting hole 343 that are vertically connected. The receiving groove 342 is connected to the through hole 371. A limiting block 361 is slidably provided in the receiving groove 342. The limiting block 361 can slide in the receiving groove 342 and limit the guide rod 38. A limiting pin 362 is slidably connected to the limiting block 361. The head of the limiting pin 362 cooperates with the limiting hole 343, and the tail of the limiting pin 362 passes through the limiting block 361 to limit the sliding of the limiting block 361 in the receiving groove 342, thereby allowing the limiting block 361 to maintain the position of the guide rod 38, preventing the guide rod 38 from moving along the axial direction of the shaft sleeve 37, which would cause the clamping member 42 to rotate too small an angle and fail to clamp the bottom bracket 10. When the guide rod 38 needs to be replaced, the limiting bolt 362 is disengaged from the limiting hole 343 to release the limiting block 361. The limiting block 361 slides out of the receiving groove 342 and then contacts the limiting block of the guide rod 38, so as to facilitate the replacement of the guide rod 38.

[0070] Specifically, the stop block 361 is an L-shaped component with an open end 3611 at one end and a stepped second receiving hole 3612 extending therethrough at the other end. The guide rod 38 is provided with an annular groove 381, and the open end 3611 is configured to cooperate with the annular groove 381 to limit the position of the guide rod 38. A second spring 363 is also provided between the stop block 361 and the stop pin 362. The second receiving hole 3612 is capable of accommodating the stop pin 362 and the second spring 363. The two ends of the second spring 363 respectively abut the stop pin 362 and the stop block 361, and the second spring 363 is used to mate the stop pin 362 with the stop hole 343. The second spring 363 is sleeved on the stop bolt 362, with one end of the second spring 363 abutting the large end of the stop bolt 362 and the other end abutting the step of the second receiving hole 3612. The second spring 363 is always in a compressed state. When the stop bolt 362 is not subjected to external force, the head of the stop bolt 362 engages with the limiting hole 343 under the elastic force of the second spring 363, so that the limit block 361 cannot slide out of the receiving groove 342, thereby maintaining the axial limit of the guide rod 38. When the guide rod 38 needs to be replaced, the tail of the stop bolt 362 is pulled outward, the second spring 363 is further compressed, and the head of the stop bolt 362 is disengaged from the limiting hole 343. At this time, the limit block 361 can slide out of the receiving groove 342, eliminating the axial limit on the guide rod 38, making it easier to replace the guide rod 38.

[0071] Furthermore, if Figures 13-18 As shown, when it is necessary to switch pipes of different lengths, the movable sleeve 39 of different axial lengths is replaced accordingly. When the clamping member 42 clamps the pipe, the movable sleeve 39 abuts against the end of the pipe away from the clamping member 42. Ensure that the clamping member 42 and the movable sleeve 39 work together to clamp the pipe. Figure 13-15As shown, the movable sleeve 39 is provided with a connecting ear 391, which is located at the end of the movable sleeve 39 away from the pipe fitting and extends along the axial direction of the movable sleeve 39. The connecting ear 391 is provided with a communicating limiting groove 3911 and a U-shaped groove 3912. The intermediate disk 34 is also provided with a first accommodating hole 344, in which an operating shaft 351 is slidably arranged. The operating shaft 351 is used to limit the sliding of the movable sleeve 39 on the shaft sleeve 37. The operating shaft 351 is provided with a large end and a small end. At least a portion of the large end is located in the first accommodating hole 344, and a portion of the large end can cooperate with the limiting groove 3911. The intermediate disk 34 is also fixedly connected to an extension block 341, and the small end of the operating shaft 351 is slidably engaged with the extension block 341. The small end can slide in the U-shaped groove 3912, and a first spring 352 is provided between the large end and the first receiving hole 344. The two ends of the first spring 352 abut against the large end and the bottom wall of the first receiving hole 344 respectively. The first spring 352 is always in a compressed state, and the large end is partially located in the first receiving hole 344 to limit the sliding of the movable sleeve 39 on the shaft sleeve 37, so that the position of the movable sleeve 39 on the shaft sleeve 37 is fixed, and it clamps the pipe of the corresponding length together with the clamping member 42. When the movable sleeve 39 needs to be replaced, the small end of the operating shaft 351 is pressed, and the first spring 352 is further compressed, so that the large end of the operating shaft 351 is disengaged from the limiting groove 3911. At this time, the limiting groove 3911 can slide relative to the shaft sleeve 37, so that the switching of the movable sleeve 39 is faster and can be achieved without fasteners, thereby improving the efficiency of switching modes.

[0072] Optionally, the clamping drive member 31 is a telescopic cylinder or a linear motor. In this embodiment, the clamping drive member 31 is preferably a telescopic cylinder.

[0073] The present invention provides a pipe fitting production method, which is applied to the pipe fitting welding station in this embodiment. The pipe fitting production method includes:

[0074] S1, loading multiple fixtures 200;

[0075] S2, the rotary seat 120 rotates continuously at a preset time interval so that at least one loaded fixture 200 faces the welding robot in turn;

[0076] S3. Continue welding the pipe fittings to be welded on the loaded fixture 200, and continue unloading and reloading the welded fixture 200.

[0077] The preset time interval for the rotation of the rotary seat 120 is determined by the production cycle and is not specifically limited here. In this embodiment, four clamps 200 are mounted on the rotary seat 120. The four clamps 200 are divided into two groups, each of two. The two groups of clamps 200 are radially arranged, and the angle of rotation of the rotary seat 120 is 180 degrees per rotation. The welding robot sequentially welds the pipe fittings to be welded on the two clamps 200 in one group. During this process, the two clamps 200 in the other group are unloaded and loaded. This significantly reduces the waiting time of the welding robot, enables continuous welding operations, improves production efficiency, and also ensures the stability of the welding quality and precision of the finished parts.

[0078] The present invention provides a center pipe and five-way pipe welding assembly, which is welded using the pipe welding station of this embodiment or produced using the pipe production method of this embodiment. The welded finished parts have higher welding quality, welding precision and better consistency.

[0079] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A pipe welding station, comprising a welding robot capable of welding along a preset trajectory, characterized in that: The device further comprises a workbench (100), wherein a base (110) and a rotary seat (120) are arranged at intervals on the workbench (100), wherein the base (110) is used to install the welding robot, and a plurality of clamps (200) are arranged on the rotary seat (120), and the rotary seat (120) can rotate relative to the workbench (100) so that at least one of the clamps (200) faces the welding robot; The clamp (200) is provided with a connecting component (1), a column (2), a pressing component (8), a clamping device and a positioning device. The connecting component (1) is used for fixed connection with the slewing seat (120). The connecting component (1) is provided with an adjusting plate (12). The adjusting plate (12) is rotatably arranged at the lower end of the column (2). The column (2) extends in a vertical direction. The pressing component (8) and the clamping device are both installed on the column (2). The clamping device is used for supporting the pipe to be welded. The welded pipe fittings are a five-way pipe (10) and a middle pipe (20), the five-way pipe (10) is perpendicular to the axis of the middle pipe (20), and the five-way pipe (10) is at the lower end of the middle pipe (20), the pressing assembly (8) is used to limit the movement of the middle pipe (20) relative to the column (2), the positioning device is slidably connected to the column (2), and a positioning piece is detachably provided on the positioning device, the positioning piece is provided with a positioning surface matching the middle pipe (20), and the positioning piece is used to position the middle pipe (20); The body (21) of the column (2) is fixedly connected with a first slide rail (22), a second slide rail (23) and a third slide rail (24), the second slide rail (23) and the third slide rail (24) are located on both sides of the column (2), the first slide rail (22) is adjacent to the second slide rail (23) and the third slide rail (24), the positioning device includes a first positioning assembly (6), the first positioning assembly (6) includes a first frame (61), the first frame (61) is internally fixedly connected with a first slider (62) and a second slider (63), the first slider (62) and the second slider (63) are slidably connected to the second slide rail (23) and the third slide rail (24), respectively, the positioning member includes a first positioning block (64), the first positioning block (64) is detachably connected to the first frame (61), and the first positioning block (64) is provided with a positioning surface matching the middle tube (20).

2. The pipe welding station according to claim 1, characterized in that: The positioning device further includes a second positioning assembly (7), the second positioning assembly (7) includes a second frame (71) and a third slider (73), a fourth slide rail (72) is fixedly connected inside the second frame (71), one end of the third slider (73) is slidably connected to the fourth slide rail (72), and the other end of the third slider (73) is slidably connected to the first slide rail (22), and the extension direction of the fourth slide rail (72) is perpendicular to the extension direction of the column (2), and the positioning member further includes a second positioning block (75), the second positioning block (75) is fixedly connected to the second frame (71), and the second positioning block (75) is used to fit with the middle tube (20).

3. The pipe welding station according to claim 2, characterized in that: The positioning device further comprises a lower positioning assembly (5), the lower positioning assembly (5) comprising an adjusting arm (51), a positioning shaft (52) and a positioning pin (53), the adjusting arm (51) being rotatably connected to the lower end of the column (2), the positioning shaft (52) being fixedly connected to the adjusting arm (51), the positioning pin (53) being mounted on the positioning shaft (52), and the positioning pin (53) being used to cooperate with the positioning hole of the five-way tube (10).

4. The pipe welding station according to any one of claims 1 to 3, characterized in that: The clamping device includes a support assembly (3), the support assembly (3) includes a core shaft (311), a sleeve (37) and a fixed block (33), the sleeve (37) is sleeved outside the core shaft (311), the sleeve (37) is fixedly connected to the fixed block (33), the fixed block (33) is fixedly connected to the lower end of the column (2), the sleeve (37) is used to pass through the five-way tube (10), the pressing assembly (8) includes a pressing drive member (82), a third frame (81) and a pressing shaft (87), the downward pressure driving member (82) is arranged at the upper end of the column (2) and can slide along the length direction of the column (2), the output shaft of the downward pressure driving member (82) is connected to the third frame (81), and can drive the third frame (81) to slide along the length direction of the column (2), the downward pressure shaft (87) is fixedly connected to the end of the third frame (81) away from the downward pressure driving member (82), and the downward pressure shaft (87) can abut against the top end of the middle tube (20).

5. The pipe welding station according to claim 4, characterized in that: The support assembly (3) further includes an intermediate disk (34) and a movable sleeve (39), wherein the intermediate disk (34) is arranged between the shaft sleeve (37) and the fixed block (33), and the intermediate disk (34) and the shaft sleeve (37) are integrally arranged, and the movable sleeve (39) is sleeved on the shaft sleeve (37) and can slide along the axial direction of the shaft sleeve (37), and an operating shaft (351) is slidably arranged on the intermediate disk (34), and the operating shaft (351) is used to limit the sliding of the movable sleeve (39) on the shaft sleeve (37).

6. The pipe welding station according to claim 5, characterized in that: The clamping device also includes a clamping assembly (4), the clamping assembly (4) includes an adjusting shaft (41) and a clamping member (42), the adjusting shaft (41) and the clamping member (42) are hingedly connected via a hinge shaft (44), the adjusting shaft (41) is connected to the core shaft (311), and the core shaft (311) can slide along the axial direction of the sleeve (37), the support assembly (3) also includes a guide rod (38), the guide rod (38) is fixedly arranged in the sleeve (37) and arranged parallel to the core shaft (311), and a reversing block (422) is provided on the clamping member (42), the reversing block (422) is used to contact one end of the guide rod (38) and make the clamping member (42) rotate around the hinge shaft (44) along the first rotation direction.

7. The pipe welding station according to claim 6, characterized in that: The clamping assembly (4) further includes a tension spring (43), one end of which is fixedly connected to the adjusting shaft (41), and the other end of which passes through the clamping member (42). The tension spring (43) is used to rotate the clamping member (42) around the hinge shaft (44) in a second rotation direction, wherein the first rotation direction is opposite to the second rotation direction.

8. A method for producing a pipe fitting, characterized in that: Applicable to the pipe fitting welding station according to any one of claims 1 to 7, the pipe fitting production method comprises: S1, loading a plurality of fixtures (200); S2, the rotary seat (120) continuously rotates at a preset time interval so that at least one loaded fixture (200) faces the welding robot in sequence; S3, continuing to weld the pipe fittings to be welded on the loaded fixture (200), while continuing to unload and reload the fixture (200) after welding.

9. The welding assembly of the middle tube and the bottom tube is characterized by: The pipe is welded using the pipe welding station described in any one of claims 1 to 7, or produced using the pipe production method described in claim 8.

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