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

Abstract

The invention relates to the technical field of welding engineering, and particularly discloses a pipe fitting welding station, a pipe fitting production method and a middle pipe and five-way pipe welding assembly. A plurality of clamps are arranged on a rotary seat, at least one clamp faces a welding robot through rotation of the rotary seat, and the welding robot can conduct welding while welding is conducted; and the clamps are in a vertical state on the rotary seat, so that the state of the pipe fittings to be welded in the welding process is consistent with the posture in the using process, the precision of the welded finished product parts is improved, and meanwhile, the robot is used for replacing manual welding, so that the labor intensity is reduced, and the production efficiency is improved. And the welding quality and precision are improved, and the stability is good.

Description

Technical Field

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

[0002] The assembly of the middle pipe and the five-way pipe of a bicycle is usually connected by welding. Existing welding operations usually use a horizontal fixture for manual horizontal welding. However, the middle pipe and the five-way pipe assembly are in a vertical state on the bicycle. Welding on a horizontal fixture will result in poor positioning accuracy and welding accuracy, and will also reduce the accuracy of the welded finished part, failing to meet the accuracy requirements in the vertical state. In addition, the welding quality and welding accuracy of manual welding are both uncontrollable, the yield rate of the welded finished part is low, and the efficiency of manual welding is low, becoming a bottleneck for improving production capacity. Summary of the Invention

[0003] The purpose of the present invention is to provide a pipe fitting welding station, a pipe fitting production method, and a welding assembly of a middle pipe and a five-way pipe to solve the problems of poor accuracy of the welded finished part and low welding efficiency in the prior art.

[0004] The present invention provides a pipe fitting welding station, including a welding robot capable of welding along a preset trajectory, and further including a workbench. A base and a rotary seat are arranged at intervals on the workbench. The base is used for installing the welding robot, and a plurality of fixtures are arranged on the rotary seat. The rotary seat can rotate relative to the workbench so that at least one of the fixtures faces the welding robot;

[0005] The fixture is provided with a connection component, a column, a pressing component, a clamping device, and a positioning device. The connection component is used for fixedly connecting with the rotary seat. The connection component is provided with an adjusting plate, and the adjusting plate is rotatably arranged at the lower end of the column. The column extends in the vertical direction. The pressing component and the clamping device are both installed on the column. The clamping device is used for supporting the pipe fitting to be welded, and the pressing component is used for restricting the movement of the pipe fitting to be welded relative to the column. The positioning device is slidably connected with the column, and a positioning member is detachably arranged on the positioning device. The positioning member is provided with a positioning surface matching the pipe fitting to be welded, and the positioning member is used for positioning the pipe fitting 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 inside the first frame, the first slider and the second slider are slidably connected to the second slide rail and the third slide rail respectively, 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 component, the second positioning component 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, the second positioning block 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, 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 pressing assembly includes a pressing drive, a third frame and a pressing shaft, the pressing 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 pressing drive is connected to the third frame and can drive the third frame to slide along the length direction of the column, the pressing shaft is fixedly connected to an end of the third frame away from the pressing drive, and the pressing shaft can abut against the top end of the pipe to be welded.

[0010] As a preferred technical solution for the pipe fitting welding station, the support assembly further includes an intermediate disk and a movable sleeve. The intermediate disk is disposed between the bushing and the fixed block, and the intermediate disk is integrally provided with the bushing. The movable sleeve is sleeved on the bushing and can slide axially along the bushing. An operating shaft is slidably disposed on the intermediate disk, and the operating shaft is used to limit the sliding of the movable sleeve on the bushing.

[0011] As a preferred technical solution for the pipe fitting welding station, the clamping device further includes a clamping assembly. The clamping assembly includes an adjusting shaft and a clamping member. The adjusting shaft and the clamping member are hingedly connected through a hinge shaft. The adjusting shaft is connected to the core shaft, and the core shaft can slide axially along the bushing. The support assembly further includes a guide rod. The guide rod is fixedly disposed in the bushing and is arranged parallel to the core shaft. A reversing block is provided on the clamping member, and the reversing block is used to contact one end of the guide rod and cause the clamping member to rotate around the hinge shaft in a first rotation direction.

[0012] As a preferred technical solution for the pipe fitting welding station, the clamping assembly further includes a tension spring. One end of the tension spring 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 cause the clamping member to rotate around the hinge shaft in 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. The pipe fitting production method includes:

[0014] S1. Loading a plurality of jigs;

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

[0016] S3. Continuously welding the pipe fittings to be welded on the loaded jigs, and at the same time continuously unloading the welded jigs and reloading them.

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

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

[0019] The present invention provides a pipe fitting welding station. A plurality of jigs are arranged on a rotary seat. By rotating the rotary seat, at least one jig faces the welding robot, so that while the welding robot is welding, loading and unloading operations can be performed on other jigs, improving production efficiency. Moreover, the jigs are in a vertical state on the rotary seat, so that the state of the pipe fitting to be welded during the welding process is consistent with its posture during use, improving the precision of the welded finished product. At the same time, a robot is used to replace manual welding, and both the welding quality and precision are improved and the stability is good.

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

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

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

[0023] Figure 2 is a schematic structural diagram of the jig in an embodiment of the present invention;

[0024] Figure 3 is a schematic structural diagram of the jig with the connection component hidden in an embodiment of the present invention;

[0025] Figure 4 is a schematic structural diagram of the jig with the connection component and the lower positioning component hidden in an embodiment of the present invention;

[0026] Figure 5 is a schematic structural diagram of the lower positioning component in an embodiment of the present invention;

[0027] Figure 6 is a sectional view of the lower positioning component in an embodiment of the present invention;

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

[0029] Figure 8 is a schematic structural diagram of the first positioning component in an embodiment of the present invention;

[0030] Figure 9 is a sectional view of the first positioning component in an embodiment of the present invention;

[0031] Figure 10 is a schematic structural diagram of the second positioning component in an embodiment of the present invention;

[0032] Figure 11 is one of the schematic structural diagrams of the lower pressing component in an embodiment of the present invention;

[0033] Figure 12 The second structural schematic diagram of the pressing component in the embodiment of the present invention;

[0034] Figure 13 The structural schematic diagram of the support component and the clamping component in the embodiment of the present invention;

[0035] Figure 14 The cross-sectional view of the support component and the clamping component in the embodiment of the present invention;

[0036] Figure 15 The structural schematic diagram of the movable sleeve in the embodiment of the present invention;

[0037] Figure 16 The structural schematic diagram of the support component in the embodiment of the present invention;

[0038] Figure 17 The structural schematic diagram of the support component in the embodiment of the present invention with the guide rod and the limit block hidden;

[0039] Figure 18 The cross-sectional view of the intermediate plate and the limit block in the embodiment of the present invention;

[0040] Figure 19 The first cross-sectional view of the clamping component in the embodiment of the present invention;

[0041] Figure 20 The second cross-sectional view of the clamping component in the embodiment of the present invention.

[0042] In the figure:

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

[0044] 1, connecting component; 11, substrate; 12, adjusting plate; 121, pin hole; 122, first adjusting hole;

[0045] 2, column; 21, body; 22, first slide rail; 23, second slide rail; 24, third slide rail;

[0046] 3, support component; 31, clamping driving part; 311, core shaft; 32, mounting plate; 321, second adjusting hole; 33, fixed block; 34, intermediate plate; 341, extension block; 342, receiving groove; 343, limit hole; 344, first receiving hole; 351, operating shaft; 352, first spring; 361, limit block; 3611, open end; 3612, second receiving hole; 362, limit bolt; 363, second spring; 37, bushing; 371, through hole; 38, guide rod; 381, annular groove; 39, movable sleeve; 391, connecting ear; 3911, limit groove; 3912, U-shaped groove;

[0047] 4. Clamping assembly; 41. Adjusting shaft; 411. First threaded hole; 412. Second threaded hole; 413. Third receiving hole; 414. First hinged part; 42. Clamping piece; 421. Second hinged part; 422. Reversing block; 423. Matching hole; 43. Tension spring; 44. Hinge 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. Quick 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-down assembly; 81. Third frame; 82. Pressing-down driving part; 83. Driving plate; 84. Fourth slider; 85. Fifth slider; 86. Pressing-down head; 87. Pressing-down shaft; 871. Positioning protrusion. Detailed implementation manners

[0052] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0053] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions. Moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath" and "under" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the first feature has a lower horizontal height than the second feature.

[0054] In the description of the present invention, it should be noted that, unless otherwise clearly defined and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention may be understood according to specific circumstances.

[0055] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0056] As Figures 1 - 20As shown in the figure, the present invention provides a pipe fitting welding station, which includes a welding robot. The welding robot can perform welding along a preset trajectory. The structure of the welding robot and the related methods for enabling the welding robot to perform welding along the preset trajectory are prior arts in the field and will not be elaborated herein. The pipe fitting welding station further includes a workbench 100. On the workbench 100, a base 110 and a rotary seat 120 are arranged at intervals. The base 110 is used to install the welding robot, so that the relative position relationship between the robot and the rotary seat 120 is determined and unchanged. A plurality of jigs 200 are arranged on the rotary seat 120. The rotary seat 120 can rotate relative to the workbench 100, so that at least one jig 200 faces the welding robot, realizing the loading and unloading operations on other jigs 200 while the welding robot is welding, improving the production efficiency. At the same time, the relative position relationship between the welding robot and the jig 200 remains unchanged, and finally, the welded finished parts have high quality and precision, and the consistency of quality and precision is relatively high. The jig 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 with the rotary 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 the vertical direction. Both the pressing component 8 and the clamping device are installed on the column 2. The clamping device is used to support the pipe fitting to be welded. The pressing component 8 is used to limit the movement of the pipe fitting to be welded relative to the column 2. The positioning device is slidably connected with the column 2. A positioning member is detachably arranged on the positioning device. The positioning member is provided with a positioning surface matching the pipe fitting to be welded. The positioning member is used to position the pipe fitting to be welded. In this embodiment, the pipe fitting to be welded is a five-way pipe 10 and a middle pipe 20. The axes of the five-way pipe 10 and the middle pipe 20 are perpendicular, and the five-way pipe 10 is welded and connected to the lower end of the middle pipe 20. The clamping device is used to support the five-way pipe 10. The pressing component 8 is used to press the middle pipe 20 and the five-way pipe 10. The positioning device is used to position the five-way pipe 10 and the middle pipe 20, so as to prevent the lap joint of the five-way pipe 10 and the middle pipe 20 from moving and ensure the welding quality. In this embodiment, the jig 200 is in a vertical state on the rotary seat 120, so that the state of the pipe fitting to be welded during the welding process is consistent with the posture during use. The precision of the welded finished parts is improved. At the same time, using a robot to replace manual welding, both the welding quality and precision are improved and the stability is good.

[0057] Specifically, please refer to Figures 1 - 2As shown, the connecting component 1 is further provided with a substrate 11, which is used for fixedly connecting with the rotary base 120 of the workbench 100. The substrate 11 is perpendicular and fixedly connected to the adjusting plate 12, and the adjusting plate 12 is connected to the column 2 through the fixing block 33 of the supporting component 3. The column 2 is fixedly connected to the fixing block 33. The adjusting plate 12 is provided with a pin hole 121 and a first adjusting hole 122. The first adjusting hole 122 is an arc-shaped hole. The adjusting plate 12 can rotate relative to the fixing block 33 around the axis of the pin hole 121, and the fastener passes through the first adjusting hole 122 to fixedly connect the adjusting plate 12 with the fixing block 33. Since the substrate 11 is fixedly connected to the rotary base 120, by rotating the adjusting plate 12 relative to the fixing block 33, the included angle between the column 2 and the vertical direction is changed, so that the postures of the five-way pipe 10 and the middle pipe 20 on the fixture 200 are consistent with the postures when installed on the bicycle.

[0058] Furthermore, as Figures 3 - 4 , and in combination with Figures 7 - 12 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 its length direction on 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 cuboid strip structure, and its three sides correspond to the first slide rail 22, the second slide rail 23 and the third slide rail 24 one by one, and the other side corresponds to the middle pipe 20. The length directions of the first slide rail 22, the second slide rail 23 and the third slide rail 24 are 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 parts include the first positioning block 64 of the first positioning component 6 and the second positioning block 75 of the second positioning component 7. Please refer to Figures 8 - 9As shown, the first positioning assembly 6 is provided in plurality, and the plurality of first positioning assemblies 6 are spaced apart along the length direction of the column 2. The first positioning assembly 6 comprises a first frame 61, and a first slider 62 and a second slider 63 are fixedly connected inside the first frame 61. 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. A locking screw is correspondingly provided on the first positioning assembly 6. When the first positioning assembly 6 slides into place, the first slider 62 and the second slider 63 are respectively locked on the second slide rail 23 and the third slide rail 24 by the locking screw. The first positioning block 64 is detachably connected to the frame, and the first positioning block 64 is provided with a positioning surface matching the pipe to be welded. In this embodiment, the first positioning block 64 is used to position the middle pipe 20, that is, the first positioning block 64 is provided with a positioning surface matching the middle pipe 20. The first frame 61 is a U-shaped structure, and the first slider 62 and the second slider 63 are provided on the two inner side walls of the first frame 61. The first positioning block 64 is fixedly connected to the side of the first frame 61 away from the U-shaped opening to cooperate with the middle pipe 20 and position it. When switching to a middle tube 20 of different specifications, it is only necessary to disassemble and replace the corresponding first positioning block 64, thereby improving the applicable scenarios of the clamp 200. 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 component 7 is located below the first positioning component 6. The second positioning component 7 includes a second frame 71 and a third slider 73. The second frame 71 is also arranged in a U-shaped structure. 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. The third slider 73 and the first slide rail 22 are locked by a locking screw. The extending direction of the fourth slide rail 72 is perpendicular to the extending 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 component 7 further includes an extension arm 74. The second positioning block 75 is fixedly connected to the second frame 71 through the extension arm 74. The second positioning block 75 is used to fit with the pipe to be welded. In this embodiment, the second positioning block 75 is used to position the middle pipe 20, and the matching position of the second positioning block 75 and the middle pipe 20 is near the overlapping joint position of the middle pipe 20 and the five-way pipe 10. Therefore, the extension arm 65 is provided to fixedly connect the second positioning block 75 and the second frame 71, providing a movement space for the welding of the welding robot and avoiding interference. By setting the fourth slide rail 72 to be slidably matched with the third slider 73, the second frame 71 can slide in a direction perpendicular to the column 2, so that the second positioning block 75 can be applicable to middle pipes 20 of different thicknesses. Adjusting bolts (not shown in the figure) are respectively threadedly connected to both ends of the second frame 71. The two adjusting bolts are oppositely arranged and both abut against the third slider 73. When adjusting the sliding of the second frame 71 in a direction perpendicular to the column 2, only need to loosen one of the adjusting bolts and synchronously tighten the other adjusting bolt to change the position of the second frame 71 and achieve locking. By setting the second positioning component 7 to position the overlapping joint position of the middle pipe 20 and the five-way pipe 10, the precision of the finished product after welding is further ensured.

[0061] As 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, the positioning shaft 52 is fixedly connected to the adjustment arm 51, and the positioning pin 53 is installed on the positioning shaft 52. The positioning pin 53 is used to cooperate with the positioning hole of the pipe to be welded. In this embodiment, the positioning pin 53 is used to cooperate with the positioning hole on the five-way tube 10. The positioning pin 53 extends along the radial direction of the positioning shaft 52, and a corresponding groove is provided on the positioning shaft 52 to accommodate the positioning pin 53. A third spring 54 is also provided between the positioning pin 53 and the positioning shaft 52, and the two ends of the third spring 54 are respectively abutted on the positioning pin 53 and the positioning shaft 52, so that the positioning pin 53 can be extended and retracted along the radial direction of the positioning shaft 52, so as to realize the positioning of the five-way tube 10 during the loading process. The adjustment arm 51 is connected to the column 2 through the mounting plate 32 of the support assembly 3, and the mounting plate 32 is fixedly connected to the fixing block 33, and the fixing block 33 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, and 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 Figures 10 - 20 The clamping device includes a clamping assembly 4 and a supporting assembly 3, and the supporting 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, and the sleeve 37 is fixedly connected to the fixed block 33, and 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 the present embodiment, the down-pressing shaft 87 abuts against the top of the middle tube 20. Thus, through the support of the bushing 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 Figures 11 - 12As shown, the pressing-down component 8 further includes a driving plate 83, a fourth slider 84, a fifth slider 85, and a pressing-down head 86. The third frame 81 is of a U-shaped structure. The fourth slider 84 and the fifth slider 85 are fixedly connected to both sides inside the third frame 81. The fourth slider 84 and the fifth slider 85 are respectively in sliding fit with the second slide rail 23 and the third slide rail 24. The pressing-down head 86 is fixedly connected to the third frame 81 and extends in a direction away from the opening of the third frame 81. A pressing-down shaft 87 is installed at the bottom of the pressing-down head 86. A positioning protrusion 871 is radially protruded on the pressing-down shaft 87. The positioning protrusion 871 is used to cooperate with the notch at the top of the middle tube 20 to position the middle tube 20 and prevent the middle tube 20 from rotating along its own axis during the welding process. The pressing-down driving member 82 is in sliding fit with the first slide rail 22 and is locked by a locking screw. The output end of the pressing-down driving member 82 is fixedly connected with a driving plate 83. The driving plate 83 is fixedly connected to the third frame 81. The third frame 81 can move up and down along the column 2 under the drive of the pressing-down driving member 82 to press or release the middle tube 20. The pressing-down driving member 82 can be selected as a telescopic cylinder or a linear motor. In this embodiment, the pressing-down driving member 82 is preferably a telescopic cylinder.

[0064] As Figures 13 - 20As shown, the support assembly 3 further includes a clamping drive member 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 restoring member, and a hinge shaft 44. The mandrel 311 is slidably disposed coaxially within the sleeve 37. The guide rod 38 is fixedly disposed on the sleeve 37 and the axis of the guide rod 38 is parallel to the axis of the mandrel 311. The clamping drive member 31 is used to drive the mandrel 311 to slide within the sleeve 37. The sleeve 37 can penetrate into the interior of the pipe fitting to support the pipe fitting. In this embodiment, the pipe fitting is a five-way pipe 10. The intermediate disk 34 is disposed between the sleeve 37 and the fixed block 33. The intermediate disk 34 is fixedly connected to the fixed block 33. The clamping drive member 31 is mounted on the fixed block 33. The intermediate disk 34 is fixedly connected to or integrally formed with the sleeve 37. In this embodiment, the intermediate disk 34 and the sleeve 37 are preferably integrally formed. The movable sleeve 39 is sleeved outside the sleeve 37. The movable sleeve 39 can slide along the axial direction of the sleeve 37. When the clamping member 42 clamps the pipe fitting, the movable sleeve 39 abuts against one end of the pipe fitting away from the clamping member 42, thereby realizing axial limitation of the pipe fitting. The clamping member 42 can rotate relative to the mandrel 311 about a first axis. The extending direction of the first axis is perpendicular to the extending direction of the axis of the mandrel 311. The first axis is spaced from the axis of the guide rod 38. One side of the clamping member 42 is used to contact the end of the guide rod 38. The mandrel 311 can drive the clamping member 42 to approach or move away from the pipe fitting to clamp or loosen the pipe fitting along the axial direction of the pipe fitting. The setting of the pipe fitting clamping device can realize automatic clamping or loosening of the pipe fitting through the clamping drive member 31, without manual operation of clamping or loosening the pipe fitting by personnel, improving production efficiency. At the same time, after welding is completed, the heat of the pipe fitting and its surrounding components is relatively high. In this way, it also avoids the operator being scalded by high temperature when manually clamping or loosening the pipe fitting.

[0065] Further, as Figures 13 - 14 , and in combination with Figures 19 - 20As shown, the adjusting shaft 41 is fixedly connected to the core shaft 311, and the adjusting shaft 41 and the core shaft 311 are coaxially arranged. In this embodiment, the adjusting shaft 41 is provided with a second screwing 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 screwing hole 412. One end of the adjusting shaft 41 away from the core shaft 311 is provided with a first hinged portion 414, and the clamping member 42 is provided with a second hinged portion 421 and a reversing block 422. The first hinged portion 414 and the second hinged portion 421 are hinged through 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 make the clamping member 42 rotate around the hinge shaft 44 in the first direction. In this embodiment, the reversing block 422 is spaced from the hinge shaft 44. Specifically, the reversing block 422 is spaced from the hinge shaft 44 in the radial direction of the hinge shaft 44, and the extending direction of the reversing block 422 is perpendicular to the axial direction of the hinge shaft 44. One end of the reversing block 422 contacts the end of the guide rod 38. When the core shaft 311 drives the adjusting shaft 41 to move and the first hinged portion 414 drives the clamping member 42 to approach the five-way pipe 10 through the hinge shaft 44, due to the abutment of the reversing block 422 and the guide rod 38, the second hinged portion 421 rotates around the hinge shaft 44 in the first direction. During this process, the reversing block 422 and the guide rod 38 slide relative to each other and always remain in contact, so that the clamping member 42 can contact one end of the five-way pipe 10 and clamp the five-way pipe 10 to achieve axial limit.

[0066] It should be noted that the clamping member 42 has a relaxed state and a clamping state. When the clamping member 42 is in the relaxed state, its length direction is consistent with the axial direction of the five-way pipe 10, and its outer contour size is smaller than the inner diameter of the five-way pipe 10, so that the five-way pipe 10 can pass through the clamping member 42 in the relaxed state during the feeding process. When the clamping member 42 is in the clamping state, it rotates in the first direction until its length direction is perpendicular to the axial direction of the five-way pipe 10, and the length of the clamping member 42 is greater than the outer diameter of the five-way pipe 10, so as to realize the clamping of the five-way pipe 10.

[0067] Specifically, the return member in this embodiment is selected as the tension spring 43. One end of the tension spring 43 is fixedly connected to the adjusting shaft 41, and the other end of the tension spring 43 passes through the clamping member 42. The tension spring 43 is used to make the clamping member 42 rotate around the hinge shaft 44 in the second rotation direction, and the first rotation direction is opposite to the second rotation direction. A first threaded hole and a third receiving hole 413 are also provided on the adjusting shaft 41 and are in communication with each other. A part of the tension spring 43 is located in the third receiving hole 413, and a fixing screw is threadedly connected to the first threaded hole. One end of the tension spring 43 is fixed in the third receiving hole 413 by the fixing screw. A through mating hole 423 is provided on the clamping member 42, and the tension spring 43 can be in contact with the hole wall of the mating hole 423, and the other end of the tension spring 43 passes through and extends out of the mating hole 423. When the clamping member 42 is in the relaxed state, the tension spring 43 is not stressed; when the clamping member 42 is in the clamped state, the tension spring 43 undergoes elastic deformation synchronously with the clamping member 42. When the mandrel 311 drives the clamping member 42 to move away from the five-way pipe 10 through the adjusting shaft 41, the clamping member 42 rotates around the hinge shaft 44 in the second direction under the elastic action of the tension spring 43 until it returns to the relaxed state. By providing the tension spring 43, the clamping member 42 is automatically returned to the relaxed state, facilitating subsequent feeding.

[0068] In other embodiments, the return member can also be selected as a torsion spring, that is, a torsion spring is sleeved on the hinge shaft 44, and the two torsion arms of the torsion spring are respectively in contact with the first hinge portion 414 and the second hinge portion 421. The torsion spring is used to make the clamping member 42 rotate around the hinge shaft 44 in the second rotation direction, and the first rotation direction is opposite to the second rotation direction. When the clamping member 42 is in the relaxed state, the torsion spring is not stressed; when the clamping member 42 is in the clamped state, the torsion spring undergoes elastic deformation, and the two torsion arms are respectively pressed against the first hinge portion 414 and the second hinge portion 421. When the mandrel 311 drives the clamping member 42 to move away from the five-way pipe 10 through the adjusting shaft 41, the clamping member 42 rotates around the hinge shaft 44 in the second direction under the elastic action of the torsion spring until it returns to the relaxed state. By providing the torsion spring, the clamping member 42 is automatically returned to the relaxed state, facilitating subsequent feeding.

[0069] Furthermore, as Figures 14 - 18As shown in the figure, a through hole 371 for accommodating the guide rod 38 is provided on the bushing 37, and a vertically communicating receiving groove 342 and a limiting hole 343 are provided on the intermediate disc 34. The receiving groove 342 communicates with the through hole 371. A limiting block 361 is slidably arranged in the receiving groove 342. The limiting block 361 can slide in the receiving groove 342 to limit the guide rod 38. A limiting bolt 362 is slidably connected to the limiting block 361. The head of the limiting bolt 362 cooperates with the limiting hole 343, and the tail of the limiting bolt 362 passes through the limiting block 361 to limit the sliding of the limiting block 361 in the receiving groove 342, so that the limiting block 361 keeps limiting the guide rod 38, and prevents the clamping member 42 from rotating too small an angle due to the axial movement of the guide rod 38 along the bushing 37, resulting in the inability to clamp the five-way pipe 10. When the guide rod 38 needs to be replaced, the limiting bolt 362 is disengaged from the limiting hole 343 to release the limit on the limiting block 361. The limiting block 361 slides out of the receiving groove 342, and then the limit on the guide rod 38 is released, so as to facilitate the replacement of the guide rod 38.

[0070] Specifically, the limiting block 361 is an L-shaped part, with an open end 3611 at one end and a through stepped structure second receiving hole 3612 at the other end. The guide rod 38 is provided with an annular groove 381, and the open end 3611 is used to cooperate with the annular groove 381 to limit the guide rod 38. A second spring 363 is also arranged between the limiting block 361 and the limiting bolt 362. The second receiving hole 3612 can accommodate the limiting bolt 362 and the second spring 363. The two ends of the second spring 363 are respectively abutted against the limiting bolt 362 and the limiting block 361. The second spring 363 is used to make the limiting bolt 362 cooperate with the limiting hole 343. The second spring 363 is sleeved on the limiting bolt 362, with one end abutted against the large end of the limiting bolt 362 and the other end abutted against the step of the second receiving hole 3612, and the second spring 363 is always in a compressed state. When the limiting bolt 362 is not subject to external force, the head of the limiting bolt 362 cooperates with the limiting hole 343 under the elastic force of the second spring 363, so that the limiting block 361 cannot slide out of the receiving groove 342 to maintain the axial limit on the guide rod 38. When the guide rod 38 needs to be replaced, the tail of the limiting bolt 362 is pulled outwards, the second spring 363 is further compressed, and at the same time the head of the limiting bolt 362 disengages from the limiting hole 343. At this time, the limiting block 361 can slide out of the receiving groove 342 to cancel the axial limit on the guide rod 38, facilitating the replacement of the guide rod 38.

[0071] Furthermore, as Figures 13 - 18 shown, when different lengths of pipe fittings need to be switched, the movable sleeve 39 with different axial lengths is correspondingly replaced. When the clamping member 42 clamps the pipe fitting, the movable sleeve 39 abuts against the end of the pipe fitting away from the clamping member 42. Ensure that the clamping member 42 and the movable sleeve 39 jointly act to clamp the pipe fitting. As Figures 13 - 15As shown in the figure, a connecting ear 391 is provided on the movable sleeve 39. The connecting ear 391 is located at one end of the movable sleeve 39 away from the pipe fitting and extends along the axial direction of the movable sleeve 39. A limiting groove 3911 and a U-shaped groove 3912 which are communicated with each other are provided on the connecting ear 391. The intermediate plate 34 is further provided with a first accommodating hole 344. An operating shaft 351 is slidably arranged in the first accommodating hole 344. The operating shaft 351 is used to limit the sliding of the movable sleeve 39 on the sleeve 37. The operating shaft 351 is provided with a large end and a small end. At least a part of the large end is located in the first accommodating hole 344, and a part of the large end can cooperate with the limiting groove 3911. An extension block 341 is fixedly connected to the intermediate plate 34. The small end of the operating shaft 351 is slidably matched with the extension block 341. The small end can slide in the U-shaped groove 3912. A first spring 352 is arranged between the large end and the first accommodating hole 344. Two ends of the first spring 352 respectively abut against the large end and the bottom wall of the first accommodating hole 344. The first spring 352 is always in a compressed state, and a part of the large end is located in the first accommodating hole 344 to limit the sliding of the movable sleeve 39 on the sleeve 37. Thus, the position of the movable sleeve 39 on the sleeve 37 is fixed, and the corresponding length of the pipe fitting is clamped together with the clamping member 42. When the movable sleeve 39 needs to be replaced, press the small end of the operating shaft 351 to further compress the first spring 352, so that the large end of the operating shaft 351 disengages from the limiting groove 3911. At this time, the limiting groove 3911 can slide relative to the sleeve 37. Thus, the switching of the movable sleeve 39 is faster, and fixation can be achieved without fasteners, improving the efficiency of the switching die.

[0072] Optionally, the clamping driving member 31 is a telescopic cylinder or a linear motor. In this embodiment, the clamping driving 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 a plurality of jigs 200;

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

[0076] S3. Continuously welding the pipe fittings to be welded on the loaded jigs 200, and at the same time, continuously unloading the welded jigs 200 and reloading them.

[0077] The preset time interval for the rotation of the rotary seat 120 is determined according to the production beat and will not be specifically limited herein. In this embodiment, four fixtures 200 are installed on the rotary seat 120. The four fixtures 200 are divided into two groups in pairs. The two groups of fixtures 200 are arranged radially. The angle of a single rotation of the rotary seat 120 is 180 degrees. The welding robot sequentially welds the pipe fittings to be welded on two fixtures 200 in one of the groups. During this process, the two fixtures 200 in the other group are unloaded and loaded, greatly reducing the waiting time of the welding robot, realizing continuous welding operations, improving production efficiency, and also ensuring the stability of the welding quality and precision of the welded finished parts.

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

[0079] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention and are not limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A pipe welding station, comprising a welding robot, which can weld along a preset trajectory, characterized in that: The device also comprises a workbench (100), on which a base (110) and a rotating seat (120) are arranged at intervals, the base (110) is used to install the welding robot, a plurality of fixtures (200) are arranged on the rotating seat (120), and the rotating seat (120) can rotate relative to the workbench (100) so that at least one of the fixtures (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 being fixedly connected to the rotating 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 pressing component (8) is used for limiting the movement of the pipe to be welded relative to the column (2). The positioning device is slidably connected to the column (2). A positioning member is detachably arranged on the positioning device. The positioning member is provided with a positioning surface matching the pipe to be welded. The positioning member is used for positioning the pipe to be welded.

2. The pipe welding station according to claim 1, characterized in that: A first slide rail (22), a second slide rail (23) and a 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 column (2); the first slide rail (22) is arranged adjacent to the second slide rail (23) and the third slide rail (24); the positioning device comprises a first positioning assembly (6); the first positioning assembly (6) comprises a first frame (61); a first slider (62) and a second slider (63) are fixedly connected inside the first frame (61); 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 comprises a first positioning block (64); the first positioning block (64) is detachably connected to the first frame (61); the first positioning block (64) is provided with a positioning surface matching the pipe fitting to be welded.

3. The pipe welding station according to claim 2, characterized in that: The positioning device also includes a second positioning component (7), the second positioning component (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), the other end of the third slider (73) is slidably connected to the first slide rail (22), the extension direction of the fourth slide rail (72) is perpendicular to the extension direction of the column (2), and the positioning member also 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 the pipe to be welded.

4. The pipe welding station according to claim 3, 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 pipe to be welded.

5. The pipe welding station according to any one of claims 1 to 4, characterized in that: The clamping device comprises a supporting assembly (3), the supporting assembly (3) comprises a core shaft (311), a sleeve (37) and a fixing block (33), the sleeve (37) is sleeved outside the core shaft (311), the sleeve (37) is fixedly connected to the fixing block (33), the fixing 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, the pressing assembly (8) comprises a pressing driving member (82), a third frame (81) and a pressing member (83). The downward pressing 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 pressing 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 pressing shaft (87) is fixedly connected to one end of the third frame (81) away from the downward pressing driving member (82); and the downward pressing shaft (87) can abut against the top end of the pipe to be welded.

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

7. The pipe welding station according to claim 6, 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), the core shaft (311) is capable of sliding along the axial direction of the sleeve (37), the supporting assembly (3) also includes a guide rod (38), the guide rod (38) is fixedly arranged in the sleeve (37) and is arranged parallel to the core shaft (311), and a reversing block (422) is arranged 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 a first rotation direction.

8. The pipe welding station according to claim 7, characterized in that: The clamping assembly (4) further comprises 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 enable the clamping member (42) to rotate around the hinge shaft (44) along a second rotation direction, wherein the first rotation direction is opposite to the second rotation direction.

9. 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 8, the pipe fitting production method comprises: S1, loading a plurality of fixtures (200); S2, the rotating seat (120) continuously rotates at a preset time interval so that at least one clamp (200) after loading faces the welding robot in turn; 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.

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

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