Flush beveling machine for steel pipe welding

Abstract

The invention relates to the field of metal machining, and discloses a flush groove machining machine for steel pipe welding, which comprises a base, mounting grooves are symmetrically formed in the front side and the rear side of the upper surface of the base, and elastic parts are fixedly mounted on the right sides of the two mounting grooves. The locking mechanisms on the front side and the rear side are controlled to move leftwards and rightwards through the position of a gear rotating shaft on the rotating mechanism, so that the cutting feed amounts of the first cutting mechanism and the second cutting mechanism to the inner curved surface and the outer curved surface of the steel pipe are kept the same; and meanwhile, the friction wheel cuts a slope angle for welding on the left side of the cutting surface of the steel pipe on the rear side, so that during welding, after one steel pipe is inserted into an inner cavity of the other steel pipe, welding is carried out along the slope angle at the joint of the curved surfaces of the outer sides of the two steel pipes; the welding strength is improved, and the problem that the bending strength of the welding position of the two welded steel pipes is low after an existing welding device is welded is solved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of metal processing, in particular to a butt joint groove processing machine for steel pipe welding. BACKGROUND

[0002] The butt joint groove for steel pipe welding has the advantages that the butt joint end surfaces of two steel pipes are ensured to be flat and have uniform gaps, accurate centering is facilitated, the welding contact area is increased through the inclined surface of the groove, weld penetration is promoted, welding strength and connection reliability are improved, welding stress concentration is reduced, the bending and fatigue resistance of the joint is enhanced, and the sealing and structural stability of the pipeline system are ensured.

[0003] When the existing butt joint groove processing machine for steel pipe welding is used, the end of each of the two steel pipes to be welded is chamfered, the welded ends of the two steel pipes are aligned, and then welding is performed along the chamfer. Since the welded part of the two steel pipes lacks effective support structure, when the welded part of the two steel pipes is bent, the welded part is prone to breakage. Therefore, in order to improve the bending resistance of the welded part of the two steel pipes, one end of one steel pipe can be inserted into the other end of the other steel pipe, and then welding is performed to improve the bending resistance of the steel pipe. However, when the inner curved surface of one steel pipe and the outer curved surface of the other steel pipe are cut, the existing device needs to be cut in steps, and a large number of special cutting heads need to be provided for steel pipes with different inner and outer diameters. The cutting precision of the two steel pipes after cutting cannot be guaranteed, which may cause assembly problems. SUMMARY

[0004] The application provides a butt joint groove processing machine for steel pipe welding, which has the advantages of high cutting efficiency and high welding strength, and solves the problem of low bending resistance of the welded part of the existing steel pipe.

[0005] To achieve the above-mentioned purpose, the application adopts the following technical scheme: a butt joint groove processing machine for steel pipe welding, comprising a base, installation grooves are symmetrically formed on the front and rear sides of the upper surface of the base, elastic members are fixedly installed on the right sides of the two installation grooves, and the butt joint groove processing machine further comprises:

[0006] A clamping mechanism is arranged on the left side of the upper surface of the base.

[0007] A driving mechanism is arranged on the right side of the upper surface of the base.

[0008] A first cutting mechanism is arranged on the front side of the upper surface of the base.

[0009] A second cutting mechanism is arranged on the rear side of the upper surface of the base.

[0010] Two locking mechanisms are respectively disposed in the middle of two mounting slots. Each locking mechanism includes a locking sleeve that is slidably fitted into the middle of the mounting slot. A locking rod is slidably fitted into the middle of the locking sleeve and is horizontally positioned. A second lead screw is threadedly connected to the middle of the locking sleeve and is vertically positioned. A push plate is movably fitted into the bottom of the second lead screw and is slidably fitted into the bottom of the inner cavity of the locking sleeve. An elastic block is fixedly installed on the top surface of the push plate, and a friction plate is fixedly installed on the top surface of the elastic block. The top surface of the friction plate slides in contact with the bottom surface of the locking rod. A rotating mechanism is provided between the two locking mechanisms.

[0011] Preferably, the clamping mechanism includes a first side shell, which is fixedly installed on the left side of the upper surface of the base. A first driving member is fixedly installed in the middle of the upper surface of the first side shell. A first lead screw is fixedly installed at the output end of the first driving member. The upper and lower threads of the first lead screw have opposite directions. Both the upper and lower parts of the first lead screw are threadedly connected to clamping plates. The clamping plates are slidably sleeved with the inner side surface of the first side shell.

[0012] Preferably, the driving mechanism includes a second side plate, a second driving member is fixedly installed on the upper part of the right side of the second side plate, a main pulley is fixedly installed on the output end of the second driving member, the main pulley is located in the upper part of the inner cavity of the second side plate, and a belt is sleeved on the curved surface of the main pulley.

[0013] Preferably, the first cutting mechanism includes a first support base, which is slidably sleeved in the middle of the front mounting groove. The first support base is fixedly connected to the elastic element on its right side. A first connecting sleeve is slidably sleeved on the upper part of the first support base. A first mounting shaft is slidably sleeved on the middle part of the first connecting sleeve. A first movable seat is fixedly installed on the left side of the first connecting sleeve. The first movable seat is slidably sleeved on the left side of the curved surface of the first mounting shaft. A plurality of first cranks are fixedly installed circumferentially on the first movable seat. A first movable sleeve is fixedly installed on the left side of the first crank. A first mounting sleeve is fixedly installed on the left side of the first movable sleeve. A first tool holder is slidably sleeved in the middle of the first mounting sleeve. A first cutting head is fixedly installed on the left side of the first tool holder. A first telescopic rod is fixedly connected to the side of the first mounting sleeve near the first mounting shaft. One end of the first telescopic rod is fixedly connected to the first mounting shaft. A first auxiliary pulley is fixedly sleeved on the right side of the curved surface of the first mounting shaft.

[0014] Preferably, the second cutting mechanism includes a second support base, which is slidably sleeved in the middle of the rear mounting groove. The second support base is fixedly connected to the elastic element on its right side. A second connecting sleeve is slidably sleeved on the upper part of the second support base. A second mounting shaft is slidably sleeved on the middle part of the second connecting sleeve. A second movable seat is fixedly installed on the left side of the second connecting sleeve. The second movable seat is slidably sleeved on the left side of the curved surface of the second mounting shaft. A plurality of second cranks are fixedly installed circumferentially on the second movable seat. A second movable sleeve is fixedly installed on the left side of the second crank. A second mounting sleeve is fixedly installed on the left side of the second movable sleeve. A second tool holder is slidably sleeved in the middle of the second mounting sleeve. A second cutting head is fixedly installed on the left side of the second tool holder. A second telescopic rod is fixedly connected to the side of the second mounting sleeve near the second mounting shaft. One end of the second telescopic rod is fixedly connected to the second mounting shaft. A second auxiliary pulley is fixedly sleeved on the right side of the curved surface of the second mounting shaft. A friction wheel is fixedly installed on the left side of the second cutting head.

[0015] Preferably, the rotating mechanism includes a hydraulic rod, which is fixedly installed at the bottom of the left side of the second side plate. A rack is fixedly installed at the telescopic end of the hydraulic rod. A gear is movably sleeved on the front side of the middle of the base. The rack and the gear mesh with each other. A sleeve plate is fixedly installed on the upper part of the gear. A sleeve shell is fixedly sleeved on both the front and rear sides of the sleeve plate. The sleeve shell is slidably sleeved with the second lead screw on the same side.

[0016] Preferably, the contact surfaces of the locking rod and the friction plate are provided with a wear-resistant coarse coating, and the second lead screw threads of the front locking mechanism and the rear locking mechanism have opposite rotation directions.

[0017] Preferably, the clamping plate has a hard rubber coating on the curved surface of the clamping steel pipe, and there are gaps between the elastic block and the inner cavity of the locking sleeve and the threaded surface of the second lead screw.

[0018] Preferably, the inner surface of the belt is rough, and the contact surfaces of the main pulley, the first auxiliary pulley, and the second auxiliary pulley with the belt are all provided with a wear-resistant metal coating.

[0019] Preferably, the friction wheel adopts a conical design, and the first auxiliary pulley and the second auxiliary pulley are connected to the main pulley by a belt.

[0020] The beneficial effects of this invention are as follows:

[0021] 1. In use, the clamping mechanism is first activated in reverse to separate the two clamping plates. Then, the first support seat is manually pushed to the right to move the first cutter head towards the side of the first mounting shaft. Next, the first steel pipe is inserted into the middle of the front curved surface of the two clamping plates, and the right part of the first steel pipe is positioned in the middle of the multiple first cutters. Then, the first support seat is released. At this time, the elastic element pulls the first support seat to the left, so that the first cutter head contacts the inner curved surface of the first steel pipe. Similarly, the second support seat is manually moved to the left to move the second cutter head and friction wheel away from the second mounting shaft. Then, the second steel pipe is inserted into the rear curved surface of the two clamping plates. The second steel pipe is positioned in the middle, with the right side of the second steel pipe located in the middle of multiple second cutters and multiple friction wheels. Then, the second support seat is released, and the elastic element on the rear pulls the second support seat to the right, so that multiple second cutters and multiple friction wheels contact the surface of the second steel pipe. Finally, the clamping mechanism is activated in the forward direction, and two clamping plates clamp the two steel pipes, thereby enabling subsequent cutting of steel pipes with different outer and inner diameters. This overcomes the problem that existing steel pipe synchronous cutting devices require a large number of different types of cutting heads to cut multiple steel pipes with different inner and outer diameters, resulting in increased costs and the need to replace cutting heads, leading to reduced cutting efficiency.

[0022] 2. After the two steel pipes are installed, start the drive mechanism. The drive mechanism drives the first and second cutting mechanisms to rotate. Then, start the rotating mechanism in the reverse direction, causing the rear sleeve to move the rear locking mechanism to the right and lock itself. At this time, the rear locking mechanism drives the second support to the right, causing the second cutter head and friction wheel to move towards the second mounting shaft, cutting the outer curved surface of the second steel pipe. Similarly, the front sleeve drives the front locking mechanism to the left and locks itself. At this time, the front locking mechanism drives the first support to the left, causing the first cutter head to move away from the second mounting shaft, cutting the inner curved surface of the first steel pipe. The cutting mechanism controls the position of the gear shaft on the rotating mechanism, thereby controlling the displacement of the locking mechanisms on the front and rear sides to the left and right respectively. This ensures that the cutting feed of the first and second cutting mechanisms on the inner and outer curved surfaces of the steel pipe remains the same until the first and second cutting mechanisms simultaneously cut to the middle of the thick wall of the steel pipe. At the same time, the friction wheel cuts a bevel angle on the left side of the steel pipe cutting surface for welding. This allows the steel pipe to be inserted into the inner cavity of another steel pipe and welded along the bevel angle at the connection of the outer curved surfaces of the two steel pipes. This not only improves the welding strength but also increases the bending resistance of the welded joint between the two steel pipes. Attached Figure Description

[0023] The accompanying drawings, which form part of this specification, illustrate embodiments disclosed in this application and, together with the specification, serve to explain the principles of this application in a clear and understandable manner.

[0024] This disclosure will become clearer with reference to the accompanying drawings and the following detailed description, wherein:

[0025] Figure 1 This is a schematic diagram of the overall appearance and structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the clamping mechanism of the present invention;

[0027] Figure 3 This is a schematic diagram of the rotating mechanism of the present invention;

[0028] Figure 4 This is a schematic diagram of the first cutting mechanism of the present invention;

[0029] Figure 5 This is a schematic diagram of the second cutting mechanism of the present invention;

[0030] Figure 6 This is a schematic diagram of the locking mechanism structure of the present invention.

[0031] The components include: 1. Base; 101. Mounting slot; 102. Elastic element; 2. Clamping mechanism; 201. First side shell; 202. First driving element; 203. First lead screw; 204. Clamping plate; 3. Driving mechanism; 301. Second side plate; 302. Second driving element; 303. Main pulley; 304. Belt; 4. First cutting mechanism; 401. First support seat; 402. First connecting sleeve; 403. First mounting shaft; 404. First movable seat; 405. First crank; 406. First movable sleeve; 407. First mounting sleeve; 408. First tool holder; 409. First tool head; 410. First telescopic rod; 411. First auxiliary belt. 5. Second cutting mechanism; 501. Second support seat; 502. Second connecting sleeve; 503. Second mounting shaft; 504. Second movable seat; 505. Second crank; 506. Second movable sleeve; 507. Second mounting sleeve; 508. Second tool holder; 509. Second tool head; 510. Second telescopic rod; 511. Second auxiliary pulley; 512. Friction wheel; 6. Locking mechanism; 601. Locking sleeve; 602. Locking rod; 603. Second lead screw; 604. Push plate; 605. Elastic block; 606. Friction plate; 7. Rotating mechanism; 701. Hydraulic rod; 702. Rack; 703. Gear; 704. Sleeve plate; 705. Housing. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0033] Please see Figures 1 to 6 As shown, a steel pipe welding beveling machine includes a base 1. The upper surface of the base 1 has symmetrically arranged mounting grooves 101 on both the front and rear sides. An elastic element 102 is fixedly installed on the right side of each of the two mounting grooves 101. The machine also includes:

[0034] Clamping mechanism 2 is located on the left side of the upper surface of base 1;

[0035] Drive mechanism 3 is located on the right side of the upper surface of base 1;

[0036] The first cutting mechanism 4 is disposed on the front side of the upper surface of the base 1;

[0037] The second cutting mechanism 5 is disposed on the rear side of the upper surface of the base 1;

[0038] Two locking mechanisms 6 are respectively disposed in the middle of two mounting slots 101. Each locking mechanism 6 includes a locking sleeve 601, which is slidably sleeved in the middle of the mounting slot 101. A locking rod 602 is slidably sleeved in the middle of the locking sleeve 601. The locking rod 602 is horizontally disposed. A second lead screw 603 is threadedly connected to the middle of the locking sleeve 601. The second lead screw 603 is vertically disposed. A push plate 604 is movably sleeved at the bottom of the second lead screw 603. The push plate 604 is slidably sleeved at the bottom of the inner cavity of the locking sleeve 601. An elastic block 605 is fixedly installed on the top surface of the push plate 604. A friction plate 606 is fixedly installed on the top surface of the elastic block 605. The top surface of the friction plate 606 slides in contact with the bottom surface of the locking rod 602. A rotating mechanism 7 is provided between the two locking mechanisms 6.

[0039] The contact surfaces of the locking rod 602 and the friction plate 606 are both coated with a wear-resistant coarse coating, thereby increasing the frictional resistance between the locking rod 602 and the friction plate 606. This allows the second lead screw 603 to move upward along the locking sleeve 601 connected to it, and push the friction plate 606 to abut against the locking rod 602 through the push plate 604 and the elastic block 605. At this time, the elastic block 605 is compressed and contracted, and the friction plate 606 limits the sliding of the locking rod 602. The threads of the second lead screw 603 of the front locking mechanism 6 and the rear locking mechanism 6 are opposite, so that when the rotating mechanism 7 rotates, the second lead screws 603 on both the front and rear sides can drive the push plate 604, which is movably sleeved with them, to move upward, thereby achieving synchronous self-locking of the two locking mechanisms 6.

[0040] Please see Figures 1 to 2As shown, the clamping mechanism 2 includes a first side shell 201, which is fixedly installed on the left side of the upper surface of the base 1. A first driving member 202 is fixedly installed in the middle of the upper surface of the first side shell 201. A first lead screw 203 is fixedly installed at the output end of the first driving member 202. The upper and lower threads of the first lead screw 203 have opposite directions. Both the upper and lower parts of the first lead screw 203 are threadedly connected to a clamping plate 204. The clamping plate 204 is slidably sleeved with the inner side of the first side shell 201.

[0041] The clamping plate 204 has a hard rubber coating on its curved surface that holds the steel pipe. In addition, the clamping plate 204 with a larger contact surface with the steel pipe can be selected according to the size of the steel pipe to improve the friction between the clamping plate 204 and the steel pipe. In order to prevent the steel pipe from slipping during cutting, which would reduce the cutting accuracy and prevent the two sections of steel pipe used for welding from being spliced, gaps are left between the elastic block 605 and the inner cavity of the locking sleeve 601 and the threaded surface of the second lead screw 603, so as to provide sufficient space for the deformation of the elastic block 605.

[0042] Please see Figures 1 to 3 As shown, the drive mechanism 3 includes a second side plate 301. A second drive member 302 is fixedly installed on the upper part of the right side face of the second side plate 301. A main pulley 303 is fixedly installed at the output end of the second drive member 302. The main pulley 303 is located in the upper part of the inner cavity of the second side plate 301. A belt 304 is sleeved on the curved surface of the main pulley 303.

[0043] The inner surface of the belt 304 is rough, and the contact surfaces of the main pulley 303, the first auxiliary pulley 411 and the second auxiliary pulley 511 with the belt 304 are all coated with a wear-resistant metal coating. This increases the frictional resistance between the belt 304 and the main pulley 303, the first auxiliary pulley 411 and the second auxiliary pulley 511, and prevents relative sliding when the main pulley 303 drives the first auxiliary pulley 411 and the second auxiliary pulley 511 to rotate through the belt 304, which would reduce the cutting efficiency and accuracy of the first cutting mechanism 4 and the second cutting mechanism 5.

[0044] In addition, when in use, the second drive unit 302 is activated, and the output shaft of the second drive unit 302 drives the main pulley 303 to rotate. The main pulley 303 drives the belt 304 to rotate, and the belt 304 drives the first auxiliary pulley 411 and the second auxiliary pulley 511 on the front and rear sides to rotate, thereby realizing that the drive mechanism 3 drives the first cutting mechanism 4 and the second cutting mechanism 5 to rotate.

[0045] Please see Figures 1 to 4As shown, the first cutting mechanism 4 includes a first support base 401, which is slidably sleeved in the middle of the front mounting groove 101. The first support base 401 is fixedly connected to the elastic member 102 on its right side. A first connecting sleeve 402 is slidably sleeved on the upper part of the first support base 401. A first mounting shaft 403 is slidably sleeved on the middle part of the first connecting sleeve 402. A first movable seat 404 is fixedly installed on the left side of the first connecting sleeve 402. The first movable seat 404 is slidably sleeved on the left side of the curved surface of the first mounting shaft 403. Multiple movable seats 404 are equidistantly fixedly installed around the circumference of the first movable seat 404. A first crank 405 is fixedly mounted on the left side of the first crank 405. A first movable sleeve 406 is fixedly mounted on the left side of the first movable sleeve 406. A first mounting sleeve 407 is slidably sleeved on the middle of the first mounting sleeve 407. A first cutter head 409 is fixedly mounted on the left side of the first cutter head 408. A first telescopic rod 410 is fixedly connected to the side of the first mounting sleeve 407 near the first mounting shaft 403. One end of the first telescopic rod 410 is fixedly connected to the first mounting shaft 403. A first auxiliary pulley 411 is fixedly sleeved on the right side of the curved surface of the first mounting shaft 403.

[0046] The contact surfaces of the first connecting sleeve 402, the first movable seat 404, and the first mounting shaft 403 are all smooth surfaces, thereby reducing the frictional resistance between the first connecting sleeve 402, the first movable seat 404, and the first mounting shaft 403, reducing the resistance when the rotating mechanism 7 drives the first connecting sleeve 402 and the first movable seat 404 to slide left and right through the front locking mechanism 6, and reducing the load on the hydraulic rod 701. The first mounting sleeve 407 and the first tool holder 408 are connected by a sliding spline, thereby enabling quick replacement of the damaged first tool head 409. At the same time, after unloading the first tool holder 408, the first tool holder 408 can be rotated and then installed into the inner cavity of the first mounting sleeve 407, so that the blades with different curved surfaces of the first tool head 409 can contact the steel pipe, improving the utilization efficiency of the first tool head 409.

[0047] Please see Figures 1 to 3 and Figure 5As shown, the second cutting mechanism 5 includes a second support base 501, which is slidably sleeved in the middle of the rear mounting groove 101. The second support base 501 is fixedly connected to its right elastic member 102. A second connecting sleeve 502 is slidably sleeved on the upper part of the second support base 501. A second mounting shaft 503 is slidably sleeved on the middle part of the second connecting sleeve 502. A second movable seat 504 is fixedly installed on the left side of the second connecting sleeve 502. The second movable seat 504 is slidably sleeved on the left side of the curved surface of the second mounting shaft 503. A plurality of second cranks 505 are fixedly installed equidistantly around the second movable seat 504. A second movable sleeve 506 is fixedly installed on the left side of the rod 505. A second mounting sleeve 507 is fixedly installed on the left side of the second movable sleeve 506. A second tool holder 508 is slidably sleeved in the middle of the second mounting sleeve 507. A second tool head 509 is fixedly installed on the left side of the second tool holder 508. A second telescopic rod 510 is fixedly connected to the side of the second mounting sleeve 507 near the second mounting shaft 503. One end of the second telescopic rod 510 is fixedly connected to the second mounting shaft 503. A second auxiliary pulley 511 is fixedly sleeved on the right side of the curved surface of the second mounting shaft 503. A friction wheel 512 is fixedly installed on the left side of the second tool head 509.

[0048] Among them, the friction wheel 512 adopts a conical design, so that when the second cutter head 509 cuts the outer curved surface of the steel pipe, the friction wheel 512 bevels on the left side of the steel pipe cutting point to form a slope angle for welding. The first auxiliary pulley 411 and the second auxiliary pulley 511 are connected to the main pulley 303 through the belt 304.

[0049] Please see Figures 1 to 6 As shown, the rotating mechanism 7 includes a hydraulic rod 701, which is fixedly installed at the bottom of the left side of the second side plate 301. A rack 702 is fixedly installed at the telescopic end of the hydraulic rod 701. A gear 703 is movably sleeved on the front side of the middle of the base 1. The rack 702 and the gear 703 mesh with each other. A sleeve plate 704 is fixedly installed on the upper part of the gear 703. A sleeve shell 705 is fixedly sleeved on both the front and rear sides of the sleeve plate 704. The sleeve shell 705 is slidably sleeved with the second lead screw 603 on the same side.

[0050] In this case, the distance from the axis of gear 703 to the rear second lead screw 603 is greater than the distance from the axis of gear 703 to the front second lead screw 603, so that the distance that the rotating mechanism 7 drives the rear locking mechanism 6 to move is greater than the distance that the rotating mechanism 7 drives the front locking mechanism 6 to move, thereby making the cutting ratio of the first cutting mechanism 4 and the second cutting mechanism 5 with different ratios on the front and rear sides the same for the inner and outer sides of the steel pipe.

[0051] Working principle:

[0052] In use, the first driving member 202 is first started in reverse. The output end of the first driving member 202 drives the first lead screw 203 to rotate in reverse. The first lead screw 203 causes the two clamping plates 204 to separate from each other. Then, the first support seat 401 is manually pushed to the right. The first support seat 401 compresses the elastic member 102 fixedly connected to it and causes it to contract. The first support seat 401 drives the first connecting sleeve 402 to move to the right. The first connecting sleeve 402 drives the first movable seat 404 to move to the right along the first mounting shaft 403. The first movable seat 404 pulls the first mounting sleeve 407 towards one side of the first mounting shaft 403 through the first crank 405, the first movable sleeve 406 and the first telescopic rod 410. The first mounting sleeve 407 drives the first tool holder 408 towards the first mounting shaft 403. The first tool holder 408 moves to one side, and the first tool head 409 moves to one side of the first mounting shaft 403. Then, the first steel pipe is inserted into the middle of the front curved surface of the two clamping plates 204, and the right part of the first steel pipe is located in the middle of the multiple first tool heads 409. Then, the first support seat 401 is released. At this time, the elastic element 102 pulls the first support seat 401 to the left. The first support seat 401 pushes the first movable seat 404 to the left through the first connecting sleeve 402. The first movable seat 404 pushes the first mounting sleeve 407 to the side away from the first mounting shaft 403 through the first crank rod 405, the first movable sleeve 406 and the first telescopic rod 410. The first mounting sleeve 407 drives the first tool head 409 to contact the inner curved surface of the first steel pipe through the first tool holder 408.

[0053] Similarly, manually moving the second support seat 501 to the left causes the elastic element 102 fixedly connected to it to extend. At this time, the second support seat 501 on the left pushes the second movable seat 504 to move to the left along the second mounting shaft 503 through the second connecting sleeve 502. The second movable seat 504 pushes the second mounting sleeve 507 to move away from the second mounting shaft 503 through the second crank 505, the second movable sleeve 506, and the second telescopic rod 510. The second mounting sleeve 507 pushes the second cutter head 509 to move away from the second mounting shaft 503 through the second cutter holder 508. The second cutter head 509 drives the friction wheel 512 to move away from the second mounting shaft 503. Then, the second steel pipe is inserted into the middle of the curved surface of the rear side of the two clamping plates 204, and the right side of the second steel pipe is... Located in the middle of multiple second cutter heads 509 and multiple friction wheels 512, the second support seat 501 is then released. At this time, the elastic element 102 on the rear side pulls the second support seat 501 to move to the right, so that multiple second cutter heads 509 and multiple friction wheels 512 contact the surface of the second steel pipe. Finally, the first drive member 202 is started in the forward direction. The output end of the first drive member 202 drives the first lead screw 203 to rotate in the forward direction. The first lead screw 203 drives the two clamping plates 204 to move closer to each other. The two clamping plates 204 clamp the two steel pipes, thereby realizing the subsequent cutting of steel pipes with different outer and inner diameters. This overcomes the problem that existing steel pipe synchronous cutting devices require a large number of different types of cutting heads to cut multiple steel pipes with different inner and outer diameters, resulting in increased costs and the need to replace cutting heads, leading to reduced cutting efficiency.

[0054] After the two steel pipes are installed, the second drive unit 302 is activated. The output end of the second drive unit 302 drives the first auxiliary pulley 411 and the second auxiliary pulley 511 to rotate via the main pulley 303. At this time, the first auxiliary pulley 411 drives the first mounting shaft 403 to rotate. The first mounting shaft 403 drives the first mounting sleeve 407 to rotate via the first telescopic rod 410. The first mounting sleeve 407 drives the first cutter head 409 to rotate via the first cutter holder 408. At the same time, the first mounting sleeve 407 drives the first movable sleeve 406 to rotate. The first crank 405 and the first movable seat 404 drive the first connecting sleeve 402 to rotate. At this time, the first connecting sleeve 402 slides against the first support seat 401. Similarly, the rotating second auxiliary pulley 511 drives the second cutter head 509 to rotate through the second mounting shaft 503, the second telescopic rod 510, the second mounting sleeve 507, and the second cutter holder 508. The second cutter head 509 drives the friction wheel 512 to rotate. Then, the hydraulic rod 701 is started in the reverse direction. The telescopic end of the hydraulic rod 701 retracts. The telescopic end drives the rack 702 to move to the right, the rack 702 drives the gear 703 to rotate in the opposite direction, the gear 703 drives the sleeve 704 to rotate in the opposite direction, the sleeve 704 drives the rear sleeve 705 to move to the right, the rear sleeve 705 drives the rear locking sleeve 601 to move to the right through the rear second lead screw 603, at the same time the rear sleeve 705 drives the rear second lead screw 603 to rotate clockwise, the rear second lead screw 603 moves upward along the rear locking sleeve 601, the rear second lead screw 60... 3. The push plate 604 on the rear side moves upward, and the push plate 604 on the rear side pushes the elastic block 605 on the rear side to compress. The elastic block 605 on the rear side pushes the friction plate 606 on the rear side to fit tightly with the locking rod 602 on the rear side. At this time, the locking sleeve 601 on the rear side drives the locking rod 602 on the rear side to move to the right. The locking rod 602 on the rear side drives the second support seat 501 to move to the right, so that the second cutter head 509 and the friction wheel 512 move towards the direction of the second mounting shaft 503 to cut the outer curved surface of the second steel pipe on the rear side.

[0055] Similarly, the sleeve plate 704 drives the front sleeve 705 to move to the left. Simultaneously, the front sleeve 705 drives the front locking mechanism 6 to move to the left, and the front locking sleeve 601 and locking rod 602 self-lock. The front locking mechanism 6 drives the first support base 401 to move to the left, causing the first cutter head 409 to move away from the second mounting shaft 503, cutting the inner curved surface of the first steel pipe on the front side. This achieves the control of the front and rear locking mechanisms 6 to move to the left and right respectively, via the position of the rotating shaft of the gear 703 on the rotating mechanism 7. The displacement of the first cutting mechanism 4 and the second cutting mechanism 5 keeps the cutting feed of the inner and outer curved surfaces of the steel pipe the same until the first cutting mechanism 4 and the second cutting mechanism 5 cut to the middle of the thick wall of the steel pipe at the same time. At the same time, the friction wheel 512 cuts a bevel angle for welding on the left side of the steel pipe cutting surface. Thus, when welding, after inserting one steel pipe into the inner cavity of another steel pipe, welding is carried out along the bevel angle at the connection of the outer curved surfaces of the two steel pipes. At this time, not only is the welding strength improved, but the bending strength of the welded joint of the two steel pipes is also improved.

[0056] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A machine for machining a square groove for welding a steel pipe, comprising a base (1), characterized in that, The upper surface of the base (1) is symmetrically provided with mounting grooves (101) on the front and back sides, the right side of each of the two mounting grooves (101) is fixedly provided with an elastic member (102), and the base (1) further comprises: A clamping mechanism (2) is arranged on the left side of the upper surface of the base (1); A driving mechanism (3) is arranged on the right side of the upper surface of the base (1); A first cutting mechanism (4) is arranged on the front side of the upper surface of the base (1); A second cutting mechanism (5) is arranged on the back side of the upper surface of the base (1); Two locking mechanisms (6) are respectively arranged in the middle of the two mounting grooves (101), the locking mechanism (6) comprises a locking sleeve (601), the locking sleeve (601) is slidably sleeved in the middle of the mounting groove (101), a locking rod (602) is slidably sleeved in the middle of the locking sleeve (601), the locking rod (602) is horizontally arranged, a second lead screw (603) is threadedly connected to the middle of the locking sleeve (601), the second lead screw (603) is vertically arranged, a push plate (604) is movably sleeved at the bottom of the second lead screw (603), the push plate (604) is slidably sleeved at the bottom of the inner cavity of the locking sleeve (601), an elastic block (605) is fixedly arranged on the top surface of the push plate (604), a friction plate (606) is fixedly arranged on the top surface of the elastic block (605), the top surface of the friction plate (606) is in sliding contact with the bottom surface of the locking rod (602), and a rotating mechanism (7) is arranged between the two locking mechanisms (6).

2. A machine for preparing a butt groove for welding a steel pipe according to claim 1, wherein The clamping mechanism (2) comprises a first side shell (201), the first side shell (201) is fixedly arranged on the left side of the upper surface of the base (1), a first driving member (202) is fixedly arranged on the middle of the upper surface of the first side shell (201), a first lead screw (203) is fixedly arranged on the output end of the first driving member (202), the upper part and the lower part of the first lead screw (203) are oppositely threaded, and a clamping plate (204) is threadedly connected to the upper part and the lower part of the first lead screw (203), and the clamping plate (204) is slidably sleeved with the inner side of the first side shell (201).

3. The machine for machining a square groove for welding a steel pipe according to claim 2, wherein The driving mechanism (3) comprises a second side plate (301), a second driving member (302) is fixedly arranged on the upper part of the right side of the second side plate (301), a main pulley (303) is fixedly arranged on the output end of the second driving member (302), and the main pulley (303) is arranged in the upper part of the inner cavity of the second side plate (301).

4. The machine for preparing a flush groove for welding a steel pipe according to claim 3, wherein The first cutting mechanism (4) comprises a first supporting seat (401) which is slidingly sleeved in the middle of the front mounting groove (101), the first supporting seat (401) is fixedly connected with the elastic member (102) on the right side thereof, the upper portion of the first supporting seat (401) is slidingly sleeved with a first connecting sleeve (402), the middle portion of the first connecting sleeve (402) is slidingly sleeved with a first mounting shaft (403), the left side of the first connecting sleeve (402) is fixedly installed with a first movable seat (404), the first movable seat (404) is slidingly sleeved on the left side of the curved surface of the first mounting shaft (403), a plurality of first curved rods (405) are fixedly installed on the first movable seat (404) at equal intervals in the circumferential direction, the left side of the first curved rod (405) is fixedly installed with a first movable sleeve (406), the left side of the first movable sleeve (406) is fixedly installed with a first mounting sleeve (407), the middle portion of the first mounting sleeve (407) is slidingly sleeved with a first tool seat (408), the left side of the first tool seat (408) is fixedly installed with a first tool head (409), the side of the first mounting sleeve (407) close to the first mounting shaft (403) is fixedly connected with a first telescopic rod (410), one end of the first telescopic rod (410) is fixedly connected with the first mounting shaft (403), the right side of the curved surface of the first mounting shaft (403) is fixedly sleeved with a first secondary pulley (411).

5. A machine for preparing a butt groove for welding a steel pipe according to claim 4, wherein The second cutting mechanism (5) comprises a second supporting seat (501) which is slidingly sleeved in the middle of the rear mounting groove (101), the second supporting seat (501) is fixedly connected with the elastic member (102) on the right side thereof, the upper portion of the second supporting seat (501) is slidingly sleeved with a second connecting sleeve (502), the middle portion of the second connecting sleeve (502) is slidingly sleeved with a second mounting shaft (503), the left side of the second connecting sleeve (502) is fixedly installed with a second movable seat (504), the second movable seat (504) is slidingly sleeved on the left side of the curved surface of the second mounting shaft (503), a plurality of second curved rods (505) are fixedly installed on the second movable seat (504) at equal intervals in the circumferential direction, the left side of the second curved rod (505) is fixedly installed with a second movable sleeve (506), the left side of the second movable sleeve (506) is fixedly installed with a second mounting sleeve (507), the middle portion of the second mounting sleeve (507) is slidingly sleeved with a second tool seat (508), the left side of the second tool seat (508) is fixedly installed with a second tool head (509), the side of the second mounting sleeve (507) close to the second mounting shaft (503) is fixedly connected with a second telescopic rod (510), one end of the second telescopic rod (510) is fixedly connected with the second mounting shaft (503), the right side of the curved surface of the second mounting shaft (503) is fixedly sleeved with a second secondary pulley (511), the left side of the second tool head (509) is fixedly installed with a friction wheel (512).

6. A machine for preparing a butt groove for welding a steel pipe according to claim 5, wherein The rotating mechanism (7) comprises a hydraulic rod (701) fixedly installed at the bottom of the left side of the second side plate (301), a rack (702) fixedly installed at the telescopic end of the hydraulic rod (701), a gear (703) movably sleeved at the front side of the middle part of the base (1), the rack (702) and the gear (703) being in mesh with each other, a sleeve plate (704) fixedly installed at the upper part of the gear (703), sleeve shells (705) fixedly sleeved at the front and back sides of the sleeve plate (704), and the sleeve shells (705) being in sliding sleeve connection with the second lead screw (603) on the same side.

7. A machine for preparing a butt groove for welding a steel pipe according to claim 6, wherein The contact surfaces of the lock rod (602) and the friction plate (606) are provided with wear-resistant rough coating, and the front side of the locking mechanism (6) and the rear side of the locking mechanism (6) are opposite in screw thread rotation direction.

8. The machine for preparing a single V groove for welding a steel pipe according to claim 7, wherein The curved surface of the clamping plate (204) is provided with a layer of hard rubber coating, and gaps are left between the elastic block (605), the inner cavity of the lock sleeve (601) and the threaded surface of the second lead screw (603).

9. The machine for machining a square groove for welding a steel pipe according to claim 8, wherein The inner side of the belt (304) is a rough surface, and the contact surfaces of the main pulley (303), the first secondary pulley (411) and the second secondary pulley (511) and the belt (304) are provided with a layer of wear-resistant metal coating.

10. The machine for preparing a single V groove for welding a steel pipe according to claim 9, wherein The friction wheel (512) is designed in a conical shape, and the first secondary pulley (411) and the second secondary pulley (511) are sleeved with the main pulley (303) through the belt (304).

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