An edge milling machine for spiral steel pipe production line

Abstract

The present invention provides a milling machine for a spiral steel pipe production line. The milling machine for a spiral steel pipe production line includes: a base on which a threaded steel pipe to be milled can be provided; a support slide provided on the base and capable of sliding horizontally; at least one pair of L-shaped assembly slides provided on the support slide and capable of sliding longitudinally; support swing arms respectively hinged on at least one pair of the L-shaped assembly slides; milling motors respectively provided on at least one pair of the support swing arms, with detachable milling grinding discs provided on the output shafts of at least one pair of the milling motors; and an angle hydraulic cylinder respectively hinged on at least one pair of the L-shaped assembly slides and the support swing arms, for adjusting the milling angle of the threaded steel pipe to be milled by the milling grinding disc on the support swing arms. The milling machine for a spiral steel pipe production line provided by the present invention has the advantages of being simple and convenient in adjusting the milling angle during milling, being capable of milling profiles of various thicknesses, and ensuring welding effects.

Description

Technical Field

[0001] The invention relates to the technical field of spiral steel pipe production, in particular to an edge milling machine for a spiral steel pipe production line. Background Art

[0002] The spiral steel pipe edge milling machine is used to improve the edge condition of the welded pipe forming plate, so that the welded steel strip can obtain good edge condition and surface roughness before entering the forming and welding process, which has an important influence on the forming and welding quality of the welded pipe.

[0003] The milling machines currently used mainly include fixed milling machines and milling machines that can crawl along the threaded steel pipe. When the fixed milling machine is in operation, the threaded steel pipe to be milled is fed in for milling, while the milling machine that can crawl along the threaded steel pipe needs to fasten the chain on the threaded steel pipe during operation, and then the milling machine crawls and mills. No matter which of the above two is used, complex debugging work is required during milling. Especially when the threaded steel pipe profile to be milled is thick, it is not possible to mill out the bevel with appropriate angle, which makes the welding problem more serious, resulting in poor quality of the threaded steel pipe and easy breakage.

[0004] Therefore, it is necessary to provide a new spiral steel pipe production line with a milling machine to solve the above technical problems. Summary of the Invention

[0005] The technical problem solved by the present invention is to provide a milling machine for a spiral steel pipe production line, which has the advantages of simple and convenient adjustment of the milling angle during milling, can cope with milling of profiles of various thicknesses, and ensure welding effect.

[0006] In order to solve the above technical problems, the present invention provides a milling machine for a spiral steel pipe production line, which includes: a base on which the threaded steel pipe to be milled can be provided; a supporting slide provided on the base and capable of sliding horizontally; at least one pair of L-shaped assembly slides provided on the supporting slide and capable of sliding longitudinally; supporting swing arms respectively hingedly provided on at least one pair of the L-shaped assembly slides; milling motors respectively provided on at least one pair of the supporting swing arms, and a detachable milling grinding disc provided on the output shaft of at least one pair of the milling motors; and an angle hydraulic cylinder respectively hingedly provided on at least one pair of the L-shaped assembly slides and the supporting swing arms, which is used to adjust the milling angle of the milling grinding disc on the supporting swing arm to the threaded steel pipe to be milled.

[0007] Preferably, at least one pair of the support swing arms is slidably installed with an arc-shaped guide bar, at least one pair of the arc-shaped guide bars are respectively fixedly connected to the corresponding L-shaped assembly slides, and at least one pair of the support swing arms is used to cooperate with a bolt for fixing the arc-shaped guide bar.

[0008] Preferably, a guide opening is provided on the support slide, in which a longitudinally arranged guide slide is fixedly installed, two linkage sliders respectively fixedly connected to at least one pair of L-shaped assembly slides are slidably installed on the guide slide, and two lifting hydraulic cylinders are respectively fixedly installed on the support slide with output rods respectively fixedly connected to the two linkage sliders.

[0009] Preferably, a transverse hydraulic cylinder is fixedly mounted on the base, and a transverse bracket fixedly connected to the supporting slide is fixedly mounted on the output rod of the transverse hydraulic cylinder, and the transverse bracket is arranged away from the corresponding lifting hydraulic cylinder.

[0010] Preferably, at least one pair of rollers for limiting the threaded steel pipe to be milled is fixedly mounted on the base, and balls are movably embedded in the top of the at least one pair of rollers and the base.

[0011] Preferably, at least one pair of the rolling frames are both sides of which are adjustably mounted with support strips by means of bolts, and the pair of support strips are fixedly mounted with the same side clamping plate which is arranged on the side of the threaded steel pipe to be milled.

[0012] Preferably, a lifting hydraulic cylinder 2 is fixedly installed on the supporting slide, an L-shaped mounting plate is fixedly installed on the output rod of the lifting hydraulic cylinder 2, a driving motor is fixedly installed on the L-shaped mounting plate, and a driving disk is fixedly installed on the output shaft of the driving motor for driving the threaded steel pipe to be milled to rotate.

[0013] Preferably, a reel is rotatably mounted on any one of the support swing arms, a drag cable is wound around the reel, and a synchronous sprocket is fixedly mounted on the reel and the output shaft of the corresponding milling motor, and the two synchronous sprockets are mounted with the same synchronous chain.

[0014] Preferably, the sliding sleeve on the towing cable is provided with a guide rope ring, and the guide rope ring is fixedly connected to the corresponding supporting swing arm.

[0015] Preferably, the arc-shaped guide strip is arranged along the center of the bolt axis of the support swing arm, and a guide hole for the arc-shaped guide strip to pass through is opened on the support swing arm.

[0016] Compared with the related art, the edge milling machine for spiral steel pipe production line provided by the present invention has the following beneficial effects:

[0017] The present invention provides an edge milling machine for a spiral steel pipe production line:

[0018] 1. The angle of the milling grinding disc can be adjusted as needed through the hinged support swing arm. The appropriate angle can be used to mill the larger-sized threaded steel pipes to be milled. During milling, due to the angle problem, multiple positions of the milling grinding disc are utilized, avoiding the situation where a traditional milling grinding disc has a single position and severe wear in some positions, while the other positions are not used, reducing the replacement frequency of the milling grinding disc. The deflection hydraulic cylinder is used as an adjustment part for adjusting the support swing arm, and the slidable L-shaped assembly slide is used as a mounting component. It can also adjust the distance between the two milling grinding discs as needed, thereby improving the use effect and flexibility. The degree is higher, and the overall milling accuracy is improved, which is beneficial to improving the quality of welding and reducing the problem of false welding. Through the setting of the arc guide strip, it can be fixed with the support swing arm in conjunction with bolt one, thereby improving the stability of the support swing arm during use, reducing the supporting pressure of the deflection hydraulic cylinder, improving the milling accuracy, and more conducive to improving the quality of welding and reducing the problem of false welding. Through the setting of the arc guide strip, it can be fixed with the support swing arm in conjunction with bolt one, thereby improving the stability of the support swing arm during use, reducing the supporting pressure of the deflection hydraulic cylinder, improving the milling accuracy, and more conducive to improving the quality of welding and reducing the problem of false welding.

[0019] 2. The guide slide in the guide opening facilitates the installation of a slidable linkage slide. The linkage slide is connected to the lifting hydraulic cylinder, so that the L-shaped assembly slide can be raised and lowered as needed, ensuring flexibility in use. The position of the support slide can be adjusted by the transverse hydraulic cylinder and the transverse bracket. During use, it can be adjusted according to the angle and depth of the milling edge, which is stable and flexible to use. The bottom of the support slide can be slidably connected to the base. The connection method can adopt the guide rod of the existing technology, or the same structure as the guide opening and guide slide (not shown) to ensure stability in use.

[0020] 3. The roller can limit the threaded steel pipe to be milled to prevent it from slipping out. The ball bearings ensure the rotation of the threaded steel pipe during milling and also ensure flexibility during dragging, reducing friction. The support strips and side clamps installed by bolts 2 limit the threaded steel pipe to be milled to prevent displacement during rotation, ensure the accuracy of milling, and be stable and easy to use.

[0021] 4. The driving motor drives the driving disc to rotate, so that the threaded steel pipe to be milled rotates, and the milling operation is carried out in conjunction with the milling grinding disc. The lifting hydraulic cylinder 2 is used to adjust the height to ensure the adjustment needs;

[0022] 5. The synchronous sprocket driven by the synchronous chain drives the reel to rotate. When necessary, the dragging cable can be used to drag the threaded steel pipe to be milled to the milling position, which is more labor-saving. The synchronous chain can be removed after dragging to avoid affecting the normal milling operation. One machine has multiple uses and is more convenient to use. The guide rope ring can guide the dragging cable during use to reduce the loss of the cable. The guide hole set by the equal center of the circle facilitates the installation of the arc guide bar. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the main cross-sectional structure of a preferred embodiment of the edge milling machine for a spiral steel pipe production line provided by the present invention;

[0024] Figure 2 for Figure 1 Schematic diagram of the enlarged structure of part A shown in FIG;

[0025] Figure 3 for Figure 1 Schematic diagram of the enlarged structure of part B shown in FIG;

[0026] Figure 4 A schematic diagram of the main structure of a preferred embodiment of the edge milling machine for a spiral steel pipe production line provided by the present invention;

[0027] Figure 5 for Figure 4 Schematic diagram of the enlarged structure of part C shown in;

[0028] Figure 6 It is a side view structural diagram of the supporting strips and side splints on the base of the present invention;

[0029] Figure 7 Schematic diagram of the structure of the support slide and the L-shaped assembly slide in the present invention;

[0030] Figure 8 It is a schematic diagram of the assembly structure of the L-shaped assembly slide and the supporting swing arm in the present invention.

[0031] Numbers in the figure: 1. Base; 2. Threaded steel pipe to be milled; 3. Support slide; 4. L-shaped assembly slide; 5. Support swing arm; 6. Milling motor; 7. Milling grinding disc; 8. Angle hydraulic cylinder; 9. Arc guide strip; 10. Bolt 1; 11. Guide port; 12. Guide slide; 13. Linkage slider; 14. Lifting hydraulic cylinder 1; 15. Transverse hydraulic cylinder; 16. Transverse bracket; 17. Roller; 18. Bolt 2; 19. Support strip; 20. Side clamp; 21. Lifting hydraulic cylinder 2; 22. L-shaped mounting plate; 23. Drive motor; 24. Drive disc; 25. Reel; 26. Drag cable; 27. Synchronous sprocket; 28. Synchronous chain; 29. ​​Rope guide ring. DETAILED DESCRIPTION

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0033] Please refer to Figures 1-8 ,in, Figure 1 A schematic diagram of the main cross-sectional structure of a preferred embodiment of the edge milling machine for a spiral steel pipe production line provided by the present invention; Figure 2 for Figure 1 Schematic diagram of the enlarged structure of part A shown in FIG; Figure 3 for Figure 1 Schematic diagram of the enlarged structure of part B shown in FIG; Figure 4 A schematic diagram of the main structure of a preferred embodiment of the edge milling machine for a spiral steel pipe production line provided by the present invention; Figure 5 for Figure 4 Schematic diagram of the enlarged structure of part C shown in;

[0034] Figure 6 It is a side view structural diagram of the supporting strips and side splints on the base of the present invention; Figure 7 Schematic diagram of the structure of the support slide and the L-shaped assembly slide in the present invention; Figure 8 It is a schematic diagram of the assembly structure of the L-shaped assembly slide and the supporting swing arm in the present invention.

[0035] The milling machine for a spiral steel pipe production line includes: a base 1 on which a threaded steel pipe 2 to be milled can be provided; a supporting slide 3 provided on the base 1 and capable of sliding horizontally; at least one pair of L-shaped assembly slides 4 provided on the supporting slide 3 and capable of sliding longitudinally; supporting swing arms 5 respectively hingedly arranged on at least one pair of the L-shaped assembly slides 4; milling motors 6 respectively provided on at least one pair of the supporting swing arms 5, and a detachable milling grinding disc 7 is provided on the output shaft of at least one pair of the milling motors 6; and an angle hydraulic cylinder 8 respectively hingedly provided on at least one pair of the L-shaped assembly slides 4 and the supporting swing arms 5, for adjusting the milling angle of the milling grinding disc 7 on the supporting swing arms 5 to the threaded steel pipe 2 to be milled.

[0036] It should be noted that the milling machines currently used mainly include fixed milling machines and milling machines that can crawl along the threaded steel pipe. When the fixed milling machine is in operation, the threaded steel pipe to be milled is fed in for milling, while the milling machine that can crawl along the threaded steel pipe needs to fasten the chain on the threaded steel pipe during operation, and then the milling machine crawls and mills the edge. Regardless of which one is used, complex debugging work is required during the milling process.

[0037] Take the milling machine that can crawl along the threaded steel pipe as an example. Most of them are imported from Germany and the price is about 100,000. When using it, first put multiple chains on the threaded steel pipe, and then install the relatively bulky milling machine on it. After adjusting the milling angle, start it. During the milling process, if the threaded steel pipe profile to be milled is thicker, it is only fixed by the chain during the milling process, and the stability is poor. It is easy to have more serious shaking and angle difference, and it is not possible to mill out the bevel with appropriate angle, which makes there a more serious problem of cold welding during welding, resulting in poor quality of the threaded steel pipe and easy breakage.

[0038] In this embodiment, the angle of the milling grinding disc 7 can be adjusted as needed through the hinged support swing arm 5. The appropriate angle can be used to mill the larger-sized threaded steel pipe 2 to be milled. During milling, due to the angle problem, multiple positions of the milling grinding disc 7 are utilized, avoiding the situation where the traditional milling grinding disc 7 is in a single position and local positions are severely worn while the other positions are not used, thereby reducing the replacement frequency of the milling grinding disc 7. The angular hydraulic cylinder 8 serves as an adjusting part for adjusting the support swing arm 5, and the sliding L-shaped assembly slide 4 serves as an installation component, which can also adjust the distance between the two milling grinding discs 7 as needed, thereby improving the use effect and being more flexible. The overall milling accuracy is improved, which is beneficial to improving the welding quality and reducing the problem of cold welding.

[0039] In a further preferred embodiment of the present invention, at least one pair of the support swing arms 5 is slidably installed with an arc-shaped guide bar 9, at least one pair of the arc-shaped guide bars 9 are respectively fixedly connected to the corresponding L-shaped assembly slides 4, and at least one pair of the support swing arms 5 is used to cooperate with the bolt 10 for fixing the arc-shaped guide bar 9.

[0040] In this embodiment, the arc-shaped guide bar 9 can be set to cooperate with the bolt 10 to fix the support swing arm 5, thereby improving the stability of the support swing arm 5 during use, reducing the supporting pressure of the deflection hydraulic cylinder 8, improving the accuracy of milling edges, and being more conducive to improving the quality of welding and reducing the problem of cold welding.

[0041] In a further preferred embodiment of the present invention, a guide opening 11 is provided on the support slide 3, and a longitudinally arranged guide slide 12 is fixedly installed in the guide opening 11. Two linkage sliders 13 respectively fixedly connected to at least one pair of L-shaped assembly slides 4 are slidably installed on the guide slide 12, and two lifting hydraulic cylinders 14 with output rods respectively fixedly connected to the two linkage sliders 13 are fixedly installed on the support slide 3.

[0042] In this embodiment, the guide slide 12 in the guide opening 11 facilitates the installation of the slidable linkage slider 13, and the linkage slider 13 is connected to the lifting hydraulic cylinder 14, so that the L-shaped assembly slide 4 can meet the lifting needs and ensure flexibility of use.

[0043] In a further preferred embodiment of the present invention, a transverse hydraulic cylinder 15 is fixedly mounted on the base 1, and a transverse bracket 16 fixedly connected to the support slide 3 is fixedly mounted on the output rod of the transverse hydraulic cylinder 15, and the transverse bracket 16 is arranged to avoid the corresponding lifting hydraulic cylinder 14.

[0044] In this embodiment, the position of the supporting slide 3 can be adjusted by the transverse hydraulic cylinder 15 and the transverse bracket 16, and can be adjusted according to the angle and depth of the milling edge during use. It is stable and flexible to use. The bottom of the supporting slide 3 can be slidably connected to the base 1. The connection method can adopt the guide rod of the existing technology, or the same structure as the guide port 11 and the guide slide 12 (not shown) to ensure stability in use.

[0045] In a further preferred embodiment of the present invention, at least one pair of rollers 17 for limiting the threaded steel pipe 2 to be milled is fixedly mounted on the base 1, and balls are movably embedded in the top of the at least one pair of rollers 17 and the base 1.

[0046] In this embodiment, the roller frame 17 can limit the threaded steel pipe 2 to prevent it from slipping out. The balls therein ensure the rotation of the threaded steel pipe 2 during milling, and also ensure flexibility during dragging, thereby reducing friction.

[0047] In a further preferred embodiment of the present invention, at least one pair of the rollers 17 are both adjustably mounted with support strips 19 using bolts 18, and the paired support strips 19 are fixedly mounted with the same side clamping plate 20 located on the side of the threaded steel pipe 2 to be milled.

[0048] In this embodiment, the support strips 19 and the side clamps 20 installed by the second bolt 18 limit the threaded steel pipe 2 to be milled, preventing displacement problems during rotation, ensuring the accuracy of milling, and being stable and simple to use.

[0049] In a further preferred embodiment of the present invention, a lifting hydraulic cylinder 21 is fixedly installed on the supporting slide 3, an L-shaped mounting plate 22 is fixedly installed on the output rod of the lifting hydraulic cylinder 21, a driving motor 23 is fixedly installed on the L-shaped mounting plate 22, and a driving disk 24 is fixedly installed on the output shaft of the driving motor 23, which is used to drive the threaded steel pipe 2 to be milled to rotate.

[0050] In this embodiment, the driving motor 23 drives the driving disk 24 to rotate, so that the threaded steel pipe 2 to be milled rotates, and the milling operation is performed in conjunction with the milling grinding disc 7. The lifting hydraulic cylinder 21 realizes height adjustment to ensure the adjustment needs.

[0051] In a further preferred embodiment of the present invention, a reel 25 is rotatably mounted on any one of the support swing arms 5, a dragging cable 26 is wound around the reel 25, and a synchronous sprocket 27 is fixedly sleeved on the reel 25 and the output shaft of the corresponding milling motor 6, and the two synchronous sprockets 27 are sleeved with the same synchronous chain 28.

[0052] In this embodiment, the synchronous sprocket 27 driven by the synchronous chain 28 drives the winding shaft 25 to rotate. When necessary, the dragging cable 26 can be used to drag the threaded steel pipe 2 to be milled to the milling position, which is more labor-saving. After the dragging is completed, the synchronous chain 28 can be removed to avoid affecting the normal milling operation. One machine can be used for multiple purposes and is more convenient to use.

[0053] In a further preferred embodiment of the present invention, the sliding sleeve on the towing cable 26 is provided with a guide rope ring 29 , and the guide rope ring 29 is fixedly connected to the corresponding supporting swing arm 5 .

[0054] In this embodiment, the guide rope ring 29 can guide the dragging cable 26 during use, thereby reducing cable loss.

[0055] In a further preferred embodiment of the present invention, the arc-shaped guide strip 9 is arranged along the center of the bolt axis of the support swing arm 5, and a guide hole for the arc-shaped guide strip 9 to pass through is opened on the support swing arm 5.

[0056] In this embodiment, the guide holes arranged with equal centers facilitate the installation of the arc-shaped guide strips 9 .

[0057] It is worth noting that the circuits, electronic components and modules involved in the present invention are all existing technologies and can be fully implemented by those skilled in the art. Needless to say, the content protected by the present invention does not involve improvements to software and methods.

[0058] The working principle of the edge milling machine for the spiral steel pipe production line provided by the present invention is as follows:

[0059] This solution also includes an electric control cabinet, which is installed on the equipment. When in use, each electrical device can be started and operated through the electric control cabinet. The power connection method of each electrical device is an existing mature technology and is well known to people in this field, so it will not be described in detail here.

[0060] When the present invention is in use, the threaded steel pipe 2 to be milled is first hoisted between at least two rollers 17 on the base 1. Since the hoisting cannot be in place at one time, the dragging cable 26 with a hook is released and tied to the threaded steel pipe 2 to be milled, and then the corresponding milling motor 6 is started. The output shaft of the milling motor 6 drives the reeling shaft 25 to rotate through the synchronous sprocket 27 and the synchronous chain 28. The reeling shaft 25 reels the dragging cable 26 and pulls it into place. After the pulling is completed, the synchronous chain 28 is removed to cancel the linkage;

[0061] Then, the side clamping plate 20 is placed on the side of the threaded steel pipe 2 to be milled, and is fixed with the support strip 19 and the second bolt 18 to position the threaded steel pipe 2 to be milled, and then the lifting hydraulic cylinder 21 is started to lower the driving disc 24 and press it on the threaded steel pipe 2 to be milled. At this time, the driving motor 23 can be started to rotate the driving disc 24, and the trial operation drives the threaded steel pipe 2 to be milled to rotate. The threaded steel pipe 2 to be milled rotates along multiple ball bearings more smoothly, and the side clamping plates 20 on both sides can prevent deviation.

[0062] Then, according to the required milling angle, the angles of the two supporting swing arms 5 are adjusted. When adjusting, the deflection hydraulic cylinder 8 is started to extend or retract the output rod of the deflection hydraulic cylinder 8 to adjust the pitch angle of the supporting swing arm 5. At this time, the angle of the milling grinding disc 7 on the milling motor 6 is adjusted until the milling grinding disc 7 forms an appropriate angle, and then the deflection hydraulic cylinder 8 is closed. At this time, the bolt 10 is tightened to ensure that the supporting swing arm 5 and the arc guide bar 9 are positioned.

[0063] Then start the transverse hydraulic cylinder 15 to extend the output rod of the transverse hydraulic cylinder 15, and use the transverse bracket 16 to push the supporting slide 3 to move horizontally close to the threaded steel pipe 2 to be milled, so that the milling grinding disc 7 contacts the milling mouth of the threaded steel pipe 2 to be milled. When the distance between the two milling grinding discs 7 needs to be adjusted, start the lifting hydraulic cylinder 14 to extend and retract the output rod of the lifting hydraulic cylinder 14, so that the linkage slider 13 slides along the guide port 11 and the guide slide 12, so that the L-shaped assembly slide 4 slides until the distance and angle between the two milling grinding discs 7 are adjusted. All of these are sufficient to mill the threaded steel pipe 2 to be milled. At this time, the milling grinding disc 7 is placed close to the threaded steel pipe 2 to be milled and the milling motor 6 and the drive motor 23 are started. The threaded steel pipe 2 to be milled is milled while it is rotating. At the same time, the transverse hydraulic cylinder 15 can be started to transversely adjust the milling depth. During milling, due to the angle problem, multiple positions of the milling grinding disc 7 are utilized, avoiding the situation where the traditional milling grinding disc 7 has a single position and severe wear in some local positions, while the other positions have not been used, thereby reducing the replacement frequency of the milling grinding disc 7.

[0064] Compared with the related art, the edge milling machine for spiral steel pipe production line provided by the present invention has the following beneficial effects:

[0065] The present invention provides a milling machine for a spiral steel pipe production line. The angle of the milling grinding disc 7 can be adjusted as needed through a hinged support swing arm 5. The appropriate angle can be used to mill the larger-sized threaded steel pipe 2 to be milled. During milling, due to the angle problem, multiple positions of the milling grinding disc 7 are utilized, avoiding the situation where a traditional milling grinding disc 7 is in a single position and local positions are severely worn while the other positions are not used, thereby reducing the replacement frequency of the milling grinding disc 7. The deflection hydraulic cylinder 8 serves as an adjusting part for adjusting the support swing arm 5, and the slidable L-shaped assembly slide 4 serves as an installation component, which can also adjust the distance between the two milling grinding discs 7 as needed, thereby improving the use effect, being more flexible, and improving the overall milling accuracy, which is beneficial to improving the welding quality and reducing the problem of cold welding.

[0066] It should be noted that the equipment structure and drawings of the present invention mainly describe the principles of the present invention. In terms of the technology of the design principle, the settings of the device's power mechanism, power supply system and control system are not fully described. However, on the premise that those skilled in the art understand the principles of the above invention, they can clearly know the details of its power mechanism, power supply system and control system.

[0067] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A milling machine for a spiral steel pipe production line, characterized in that: include: A base for the threaded steel pipe to be milled can be provided; A supporting slide plate provided on the base and capable of sliding laterally; at least one pair of L-shaped assembly slides disposed on the support slide and capable of longitudinally sliding; Support swing arms respectively hingedly arranged on at least one pair of the L-shaped assembly slides; Milling motors are respectively provided on at least one pair of the support swing arms, and a detachable milling grinding disc is provided on the output shaft of at least one pair of the milling motors; and Angle hydraulic cylinders are respectively hingedly arranged on at least one pair of the L-shaped assembly slides and the support swing arm, and are used to adjust the milling angle of the milling grinding disc on the support swing arm on the threaded steel pipe to be milled; At least one pair of the support swing arms is slidably provided with an arc-shaped guide bar, at least one pair of the arc-shaped guide bars are respectively fixedly connected to corresponding L-shaped assembly slides, and at least one pair of the support swing arms is provided with a bolt for fitting the arc-shaped guide bar. The support slide is provided with a guide opening, in which a longitudinally arranged guide slide is fixedly installed, and two linkage sliders are slidably mounted on the guide slide, respectively fixedly connected to at least one pair of L-shaped assembly slides, and two lifting hydraulic cylinders are fixedly mounted on the support slide, each having an output rod fixedly connected to the two linkage sliders. A transverse hydraulic cylinder is fixedly mounted on the base, and a transverse bracket fixedly connected to the support slide is fixedly mounted on the output rod of the transverse hydraulic cylinder, and the transverse bracket is arranged away from the corresponding lifting hydraulic cylinder. A reel is rotatably mounted on any one of the support swing arms, a drag cable is wound around the reel, a synchronous sprocket is fixedly sleeved on the reel and the output shaft of the corresponding milling motor, and the two synchronous sprockets are sleeved with the same synchronous chain.

2. The edge milling machine for spiral steel pipe production line according to claim 1, characterized in that: At least one pair of rollers for limiting the threaded steel pipe to be milled is fixedly mounted on the base, and balls are movably embedded in the tops of the at least one pair of rollers and the base.

3. The edge milling machine for spiral steel pipe production line according to claim 2, characterized in that: Both sides of at least one pair of the rolling frames are adjustably mounted with support strips by means of bolts, and the paired support strips are fixedly mounted with a same side clamping plate arranged on the side of the threaded steel pipe to be milled.

4. The edge milling machine for spiral steel pipe production line according to claim 1, characterized in that: A lifting hydraulic cylinder 2 is fixedly installed on the supporting slide, an L-shaped mounting plate is fixedly installed on the output rod of the lifting hydraulic cylinder 2, a driving motor is fixedly installed on the L-shaped mounting plate, and a driving disk is fixedly installed on the output shaft of the driving motor for driving the threaded steel pipe to be milled to rotate.

5. The edge milling machine for spiral steel pipe production line according to claim 1, characterized in that: The sliding sleeve on the dragging cable is provided with a guide rope ring, and the guide rope ring is fixedly connected to the corresponding supporting swing arm.

6. The edge milling machine for spiral steel pipe production line according to claim 1, characterized in that: The arc-shaped guide strip is arranged along the center of the bolt axis of the support swing arm, and a guide hole for the arc-shaped guide strip to pass through is opened on the support swing arm.

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