Automatic production line for thickening pipe end

Abstract

This utility model relates to the field of drill pipe processing technology and discloses an automated production line for thickening pipe ends. It includes a loading station, an alignment station, a heating station, an upsetting station, and a unloading station arranged sequentially. The loading station is equipped with a loading rack holding several pipes to be processed. The alignment station has an alignment mechanism. The heating station has several medium-frequency furnaces. The upsetting station has a press with a feeding mechanism at its inlet. The unloading station has an unloading rack. Automatic material transfer mechanisms are installed between the alignment station and the heating station, between the heating station and the upsetting station, and between the upsetting station and the unloading station. This automated production line for thickening pipe ends achieves fully automated processing of pipes from loading, alignment, heating, upsetting to unloading, significantly improving production efficiency, reducing labor costs, ensuring the continuity and stability of the production process, and guaranteeing the forming quality.

Description

Technical Field

[0001] This utility model relates to the field of drill pipe processing technology, and in particular to an automatic production line for thickening pipe ends. Background Technology

[0002] The raw materials used in the production of trenchless drill pipes are seamless steel pipes of various specifications. These pipes undergo multiple processing steps, including sawing, thickening, heat treatment, straightening, mechanical property testing, non-destructive testing, and thread processing. The thickening process is the core technology for achieving localized thickening of the pipe ends and enhancing the connection strength between the drill pipe body and the joint. It includes the following steps: 1) pipe pretreatment; 2) pipe end heating; 3) forging; and 4) post-processing and inspection.

[0003] The existing thickening process involves heating the pipe ends in a heating furnace, forging the pipe ends with a press, and transferring the pipe material manually with the help of cranes. However, the high heating temperature, the noisy forging process, and the heavy weight of the steel pipes result in a harsh working environment and inconvenient manual operation. In addition, small-sized pipes generally require two heating cycles and two forming stations, while large-sized pipes require three to four heating cycles and multi-station gradual forming, which further increases the complexity of the operation, resulting in high labor costs and low production efficiency. Utility Model Content

[0004] The purpose of this invention is to provide an automated production line for thickening pipe ends, which solves the problems mentioned in the background art, realizes the automatic completion of pipe heating and forging, and ensures the quality and efficiency of thickening.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An automated production line for thickening pipe ends includes a loading station, an alignment station, a heating station, an upsetting station, and an unloading station arranged sequentially, wherein:

[0007] The loading station is equipped with a loading rack, on which several pipes to be processed are placed. The loading rack is used to transport the pipes to the alignment station one by one.

[0008] The alignment station is equipped with an alignment mechanism, which is used to position the end of the tube material entering the alignment station;

[0009] The heating station is equipped with several medium-frequency furnaces, which are used to heat the ends of the tubes to a set temperature.

[0010] A press is installed in the forging station. A feeding mechanism is installed at the inlet end of the press. The feeding mechanism is used to drive the tube material to move axially and feed it into the press. The press is used to apply pressure to the end of the tube material.

[0011] The unloading station is equipped with an unloading rack, which is used to store the processed pipe materials;

[0012] Automatic material transfer mechanisms are installed between the alignment station and the heating station, between the heating station and the forging station, and between the forging station and the unloading station.

[0013] As an alternative, the loading rack is arranged at an angle, with the lower end of the loading rack extending to the alignment station, and a material distribution mechanism is provided on the lower end of the loading rack. The material distribution mechanism includes a stop block and a first cylinder. The stop block is rotatably mounted on the loading rack and is driven by the first cylinder to alternately switch to a first angle and a second angle.

[0014] When the stop block is at the first angle, the stop block does not extend beyond the surface of the feeding rack, so that the pipe material rolls over the stop block and into the alignment station;

[0015] When the stop is at the second angle, the stop extends beyond the surface of the feeding rack to prevent the tube from rolling into the alignment station.

[0016] As an alternative, the alignment mechanism includes a first axial conveyor frame and an alignment stop. The alignment stop is located at one end of the first axial conveyor frame. The first axial conveyor frame is arranged perpendicularly to the feeding frame. Several first conveyor rollers are provided on the first axial conveyor frame. The first conveyor rollers are used to support the tube material and drive the tube material to move axially until it comes into contact with the alignment stop.

[0017] As an optional solution, a V-shaped support frame is also provided in the heating station. The V-shaped support frame is arranged vertically with the feeding rack. The height of the V-shaped support frame is adjustable. The V-shaped support frame is used to support the tube material and keep the tube material at the same height as the furnace cavity of the medium frequency furnace.

[0018] The intermediate frequency furnace is located at one end of the V-shaped support frame. The furnace cavity of the intermediate frequency furnace can be close to or far away from the end of the tube on the V-shaped support frame to perform induction heating on the tube.

[0019] As an optional solution, a second axial conveyor frame is also provided in the forging station. The second axial conveyor frame is arranged perpendicular to the loading frame. Several second conveyor rollers are provided on the second axial conveyor frame. The second conveyor rollers are used to support the tube material and drive the tube material to move axially.

[0020] The feeding mechanism is located at one end of the second axial conveyor frame. The feeding mechanism includes a base frame, on which a lifting platform that can be raised and lowered and a cantilever located above the lifting platform are provided. A third conveying roller is provided on the lifting platform, and a pressure roller is provided on the cantilever. The third conveying roller and the pressure roller cooperate to clamp the pipe material and drive the pipe material into and out of the press.

[0021] As an optional solution, the automatic material handling mechanism includes a slide rail, a translation beam, a lifting drive assembly, and a translation drive assembly, wherein:

[0022] The slide rails are arranged in a direction parallel to the feeding rack, and the slide rails are provided with grooves;

[0023] The translation beam is slidably set in the chute, and V-blocks are provided on the translation beam to limit the rolling of the pipe material;

[0024] The lifting drive assembly is used to drive the slide rail to rise or fall, thereby lifting or lowering the tube material in the alignment station, heating station and / or forging station.

[0025] The translation drive assembly is used to drive the translation beam to move back and forth along the chute, thereby translating the tube from above the alignment station to above the heating station, from above the heating station to above the forging station, and / or from above the forging station to above the unloading station.

[0026] As an alternative, the lifting drive assembly includes a fixed frame, a swing arm, and a second cylinder. The fixed frame is located below the slide rail. The middle part of the swing arm is hinged to the fixed frame, and one end of the swing arm is rotatably connected to the bottom of the slide rail. The second cylinder is fixed on the fixed frame, and the output end of the second cylinder is rotatably connected to the other end of the swing arm.

[0027] As an alternative, the translation drive assembly includes a rotating gear located at the bottom of the slide rail, and a rack that engages with the rotating gear at the bottom of the translation beam.

[0028] As an alternative, multiple slide rails are arranged side by side, and the rotating gears on each slide rail are connected by a drive shaft. One end of the drive shaft is connected to a geared motor via a universal joint.

[0029] As an alternative, the heating station and the forging station form a thickening station group. Multiple thickening station groups are set up sequentially between the alignment station and the blanking station to heat and pressurize the tube material in stages.

[0030] The beneficial effects of this utility model are:

[0031] This automated production line for thickening pipe ends achieves fully automated processing of pipe materials from feeding, alignment, heating, forging to unloading, significantly improving production efficiency, reducing labor costs, ensuring the continuity and stability of the production process, and guaranteeing the forming quality. Attached Figure Description

[0032] Figure 1 This is a top view of the structure of the automatic production line for thickened pipe ends provided in this embodiment of the utility model;

[0033] Figure 2 This is a front view of the structure of the automatic production line for thickened pipe ends provided in this embodiment of the utility model;

[0034] Figure 3This is a schematic diagram of the structure of the lower end of the feeding rack according to an embodiment of the present utility model;

[0035] Figure 4 This is a schematic diagram of the feeding mechanism involved in an embodiment of the present utility model;

[0036] Figure 5 This is a schematic diagram of the automatic material transfer mechanism involved in an embodiment of this utility model.

[0037] In the attached image:

[0038] 1. Loading station; 11. Loading rack; 12. Stop block; 13. First cylinder;

[0039] 2. Alignment station; 21. First axial conveyor frame; 22. Alignment stop; 23. First conveyor roller;

[0040] 3. Heating station; 31. Medium frequency furnace; 32. V-shaped support frame;

[0041] 4. Forging station; 41. Press; 42. Second axial conveyor frame; 43. Second conveyor roller; 44. Base frame; 45. Cantilever; 46. Third conveyor roller; 47. Pressure roller; 48. Lifting platform;

[0042] 5. Unloading station; 51. Unloading rack;

[0043] 6. Automatic material transfer mechanism; 61. Slide rail; 62. Translation beam; 63. V-block; 64. Fixed frame; 65. Swing arm; 66. Second cylinder; 67. Rotary gear; 68. Rack; 69. Universal joint. Detailed Implementation

[0044] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0045] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0046] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0047] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0048] Furthermore, the terms "first" and "second" are merely used to distinguish between different terms in description and do not have any special meaning.

[0049] Please see Figures 1 to 5 As shown, this embodiment provides an automated production line for thickening pipe ends, including a loading station 1, an alignment station 2, a heating station 3, an upsetting station 4, and a unloading station 5 arranged in sequence, wherein:

[0050] The loading station 1 is equipped with a loading rack 11, on which several pipes to be processed are placed. The loading rack 11 is used to convey the pipes to the alignment station 2 one by one.

[0051] Alignment station 2 is equipped with an alignment mechanism, which is used to position the end of the tube material entering alignment station 2;

[0052] Heating station 3 is equipped with several medium frequency furnaces 31, which are used to heat the ends of the tube to a set temperature;

[0053] A press 41 is provided in the forging station 4. A feeding mechanism is provided at the inlet end of the press 41. The feeding mechanism is used to drive the tube material to move axially and feed it into the press 41. The press 41 is used to apply pressure to the end of the tube material.

[0054] The unloading station 5 is equipped with an unloading rack 51, which is used to store the processed pipe materials;

[0055] Automatic material transfer mechanisms 6 are installed between the alignment station 2 and the heating station 3, between the heating station 3 and the forging station 4, and between the forging station 4 and the unloading station 5.

[0056] This achieves fully automated processing of pipe materials from feeding, alignment, heating, forging to unloading, significantly improving production efficiency, reducing labor costs, ensuring the continuity and stability of the production process, and guaranteeing the forming quality.

[0057] Optionally, see details. Figure 3 The feeding rack 11 is arranged at an angle, and the lower end of the feeding rack 11 extends to the alignment station 2. A material distribution mechanism is provided on the lower end of the feeding rack 11. The material distribution mechanism includes a stop block 12 and a first cylinder 13. The stop block 12 is rotatably mounted on the feeding rack 11 and is driven by the first cylinder 13 to alternately switch between a first angle and a second angle. When the stop block 12 is at the first angle, the stop block 12 does not exceed the surface of the feeding rack 11, so that the tube material rolls over the stop block 12 into the alignment station 2. When the stop block 12 is at the second angle, the stop block 12 exceeds the surface of the feeding rack 11 to prevent the tube material from rolling into the alignment station 2.

[0058] Thus, the inclined feeding rack 11 enables the storage and non-powered conveying of multiple tubes, and the material distribution mechanism feeds the tubes one by one into the alignment station 2, allowing each tube to proceed to the subsequent processes in an orderly manner, avoiding tube accumulation and collision, further improving the degree of automation and processing accuracy, and ensuring the smooth and efficient production process.

[0059] Optionally, the alignment mechanism includes a first axial conveyor frame 21 and an alignment stop 22. The alignment stop 22 is located at one end of the first axial conveyor frame 21. The first axial conveyor frame 21 is arranged perpendicularly to the feeding frame 11. A plurality of first conveying rollers 23 are provided on the first axial conveyor frame 21. The first conveying rollers 23 are used to support the pipe material and drive the pipe material to move axially until it comes into contact with the alignment stop 22.

[0060] Therefore, in response to the situation where the position of the tube material conveyed from the loading rack 11 to the alignment station 2 cannot be guaranteed to be consistent, the tube material is driven to move axially by the first conveying roller 23, and the position of the tube material is calibrated by the alignment stop head 22 to ensure that the ends of each tube material are aligned. This optimizes the positioning accuracy of the tube material and improves the stability and forming quality of the subsequent heating and forging processes.

[0061] Optionally, a V-shaped support frame 32 is also provided in the heating station 3. The V-shaped support frame 32 is arranged vertically with the feeding rack 11. The height of the V-shaped support frame 32 is adjustable. The V-shaped support frame 32 is used to support the tube material and make the tube material and the furnace cavity of the medium frequency furnace 31 at the same height. The medium frequency furnace 31 is located at one end of the V-shaped support frame 32. The furnace cavity of the medium frequency furnace 31 can be close to or away from the end of the tube material on the V-shaped support frame 32 to perform induction heating on the tube material.

[0062] Therefore, after the tube material is calibrated, it is kept stationary after reaching the heating station 3. The furnace cavity of the medium frequency furnace 31 is induction heated near the end of the tube material so that the end of the tube reaches the set temperature for subsequent forging. In order to reduce energy consumption, multiple medium frequency furnaces 31 can be used for segmented heating mode to accurately control the heating time and temperature, avoiding the problems of overheating or underheating.

[0063] Optionally, the forging station 4 is also equipped with a second axial conveyor frame 42, which is arranged perpendicularly to the loading frame 11. The second axial conveyor frame 42 is equipped with several second conveying rollers 43, which support the tubing and drive the tubing to move axially. A feeding mechanism is located at one end of the second axial conveyor frame 42. See details... Figure 4 The feeding mechanism includes a base frame 44, on which a lifting platform 48 capable of being raised and lowered is provided and a cantilever 45 located above the lifting platform 48. A third conveying roller 46 is provided on the lifting platform 48, and a pressure roller 47 is provided on the cantilever 45. The third conveying roller 46 and the pressure roller 47 cooperate to clamp the pipe material and drive the pipe material into and out of the press 41.

[0064] Thus, the heated pipe material in the forging station 4 is conveyed into the press 41 through the cooperation of the second conveying roller 43 and the third conveying roller 46, and the pipe material is stabilized by the cooperation of the pressure roller 47 and the third conveying roller 46, ensuring that the pipe material does not shift during the forging process, thereby improving the accuracy and consistency of the forging process.

[0065] Optionally, see details. Figure 5 The automatic material handling mechanism 6 includes a slide rail 61, a translation beam 62, a lifting drive assembly, and a translation drive assembly. The slide rail 61 is arranged in a direction parallel to the loading rack 11, and a groove is provided on the slide rail 61. The translation beam 62 is slidably disposed in the groove, and a V-shaped block 63 for limiting the rolling of the tube is provided on the translation beam 62. The lifting drive assembly is used to drive the slide rail 61 to rise or fall, thereby lifting or lowering the tube in the alignment station 2, heating station 3, and / or forging station 4. The translation drive assembly is used to drive the translation beam 62 to move back and forth along the groove, thereby translating the tube from above the alignment station 2 to above the heating station 3, from above the heating station 3 to above the forging station 4, and / or from above the forging station 4 to above the unloading station 5.

[0066] Therefore, the automatic material transfer mechanism 6 can accurately transfer the pipe material between various workstations. Furthermore, multiple V-shaped blocks 63 of various specifications can be set on the translation beam 62 to correspond to multiple workstations, so that multiple workstations can be transferred at the same time with one movement of the translation beam 62. This ensures efficient connection of the production process, reduces manual intervention, and improves overall production efficiency. However, this requires that the spacing between each workstation be consistent.

[0067] Furthermore, the lifting drive assembly includes a fixed frame 64, a swing arm 65, and a second cylinder 66. The fixed frame 64 is located below the slide rail 61. The middle part of the swing arm 65 is hinged to the fixed frame 64. One end of the swing arm 65 is rotatably connected to the bottom of the slide rail 61. The second cylinder 66 is fixed on the fixed frame 64, and the output end of the second cylinder 66 is rotatably connected to the other end of the swing arm 65.

[0068] Therefore, the second cylinder 66 extends and retracts to drive the swing arm 65 to swing, thereby driving the slide rail 61 to rise or fall, so as to accurately lift or lower the pipe material in the corresponding work station and help transfer the pipe material between different work stations.

[0069] Furthermore, the translation drive assembly includes a rotating gear 67 disposed at the bottom of the slide rail 61, and a rack 68 disposed at the bottom of the translation beam 62 to engage with the rotating gear 67 for transmission.

[0070] Thus, the translation beam 62 moves by the cooperation of the rotating gear 67 and the rack 68, and with the help of the lifting drive assembly, the action requirements during the transfer of pipe materials are met.

[0071] Optionally, multiple slide rails 61 are arranged side by side, and the rotating gears 67 on each slide rail 61 are connected to each other by a drive shaft. One end of the drive shaft is connected to a geared motor through a universal joint 69.

[0072] Therefore, by driving the transmission shaft to rotate through the geared motor, multiple rotating gears 67 are driven to operate synchronously, ensuring that the translation beams 62 on each slide rail 61 move in a coordinated manner, further improving the synchronicity and stability of the transfer of pipe materials between each workstation.

[0073] Optionally, heating station 3 and forging station 4 form a thickening station group. Multiple thickening station groups are set up sequentially between alignment station 2 and unloading station 5 to heat and pressurize the tube material in stages.

[0074] Therefore, by setting up multiple thickening workstations and carrying out multi-level thickening processes, the quality of the thickened pipe forming is ensured, while optimizing the production rhythm, reducing energy consumption, and achieving an efficient and precise pipe processing flow.

[0075] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An automated production line for thickening pipe ends, characterized in that, It includes a loading station (1), an alignment station (2), a heating station (3), an upsetting station (4), and a unloading station (5) arranged in sequence, wherein: The loading station (1) is equipped with a loading rack (11), on which several tubes to be processed are placed. The loading rack (11) is used to transport the tubes one by one to the alignment station (2). The alignment station (2) is provided with an alignment mechanism, which is used to position the end of the tube material entering the alignment station (2); The heating station (3) is equipped with several medium-frequency furnaces (31), which are used to heat the ends of the tube to a set temperature; The forging station (4) is equipped with a press (41), and the inlet end of the press (41) is equipped with a feeding mechanism. The feeding mechanism is used to drive the tube to move axially and feed it into the press (41). The press (41) is used to apply pressure to the end of the tube. The unloading station (5) is equipped with an unloading rack (51), which is used to store the processed pipe material; Automatic material transfer mechanisms (6) are provided between the alignment station (2) and the heating station (3), between the heating station (3) and the forging station (4), and between the forging station (4) and the unloading station (5).

2. The automatic production line for thickening pipe ends according to claim 1, characterized in that, The loading rack (11) is arranged at an angle, and the lower end of the loading rack (11) extends to the alignment station (2). A material distribution mechanism is provided on the lower end of the loading rack (11). The material distribution mechanism includes a stop block (12) and a first cylinder (13). The stop block (12) is rotatably mounted on the loading rack (11) and is driven by the first cylinder (13) to alternately switch to a first angle and a second angle. When the stop (12) is at the first angle, the stop (12) does not extend beyond the surface of the loading rack (11), so that the tube rolls over the stop (12) and into the alignment station (2); When the stop (12) is at the second angle, the stop (12) extends beyond the surface of the feed rack (11) to prevent the tube from rolling into the alignment station (2).

3. The automatic production line for thickening pipe ends according to claim 1, characterized in that, The alignment mechanism includes a first axial conveyor frame (21) and an alignment stop (22). The alignment stop (22) is located at one end of the first axial conveyor frame (21). The first axial conveyor frame (21) is arranged perpendicularly to the loading frame (11). The first axial conveyor frame (21) is provided with a plurality of first conveying rollers (23). The first conveying rollers (23) are used to support the pipe material and drive the pipe material to move axially until it abuts against the alignment stop (22).

4. The automatic production line for thickening pipe ends according to claim 1, characterized in that, The heating station (3) is also provided with a V-shaped support frame (32), which is arranged vertically with the feeding rack (11). The height of the V-shaped support frame (32) is adjustable. The V-shaped support frame (32) is used to support the tube material and make the tube material and the furnace cavity of the medium frequency furnace (31) at the same height. The intermediate frequency furnace (31) is located at one end of the V-shaped support frame (32). The furnace cavity of the intermediate frequency furnace (31) can be close to or far away from the end of the tube on the V-shaped support frame (32) to perform induction heating on the tube.

5. The automatic production line for thickening pipe ends according to claim 1, characterized in that, The forging station (4) is also provided with a second axial conveying frame (42), which is arranged perpendicularly to the loading frame (11). The second axial conveying frame (42) is provided with a number of second conveying rollers (43), which are used to support the pipe material and drive the pipe material to move axially. The feeding mechanism is located at one end of the second axial conveying frame (42). The feeding mechanism includes a base frame (44), on which a lifting platform (48) capable of lifting and moving is provided and a cantilever (45) located above the lifting platform (48). A third conveying roller (46) is provided on the lifting platform (48), and a pressure roller (47) is provided on the cantilever (45). The third conveying roller (46) and the pressure roller (47) cooperate to clamp the pipe material and drive the pipe material into and out of the press (41).

6. The automatic production line for thickening pipe ends according to claim 1, characterized in that, The automatic material handling mechanism (6) includes a slide rail (61), a translation beam (62), a lifting drive assembly, and a translation drive assembly, wherein: The slide rail (61) is arranged in a direction parallel to the loading rack (11), and the slide rail (61) is provided with a sliding groove; The translation beam (62) is slidably disposed in the groove, and the translation beam (62) is provided with a V-shaped block (63) for limiting the rolling of the pipe material; The lifting drive assembly is used to drive the slide rail (61) to rise or fall, thereby lifting the tube in the alignment station (2), the heating station (3) and / or the forging station (4) or placing the tube in the heating station (3), the forging station (4) and / or the unloading station (5). The translation drive assembly is used to drive the translation beam (62) to move back and forth along the chute, thereby translating the tube from above the alignment station (2) to above the heating station (3), from above the heating station (3) to above the forging station (4), and / or from above the forging station (4) to above the unloading station (5).

7. The automatic production line for thickening pipe ends according to claim 6, characterized in that, The lifting drive assembly includes a fixed frame (64), a swing arm (65), and a second cylinder (66). The fixed frame (64) is located below the slide rail (61). The middle part of the swing arm (65) is hinged to the fixed frame (64). One end of the swing arm (65) is rotatably connected to the bottom of the slide rail (61). The second cylinder (66) is fixed on the fixed frame (64), and the output end of the second cylinder (66) is rotatably connected to the other end of the swing arm (65).

8. The automatic production line for thickening pipe ends according to claim 6, characterized in that, The translation drive assembly includes a rotating gear (67) disposed at the bottom of the slide rail (61), and a rack (68) disposed at the bottom of the translation beam (62) to engage with the rotating gear (67) for transmission.

9. The automatic production line for thickening pipe ends according to claim 8, characterized in that, Multiple slide rails (61) are arranged side by side, and the rotating gears (67) on each slide rail (61) are connected to each other by a drive shaft. One end of the drive shaft is connected to a reduction motor through a universal joint (69).

10. The automatic production line for thickening pipe ends according to claim 1, characterized in that, The heating station (3) and the forging station (4) form a thickening station group. Multiple thickening station groups are provided and are arranged sequentially between the alignment station (2) and the unloading station (5) to heat and pressurize the tube material in stages.

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