A cutting device for cutting titanium welded pipe to a predetermined length

Abstract

The application discloses the technical field of titanium pipe cutting, and particularly discloses a fixed-length cutting device for titanium welded pipe machining, which comprises a pipe cutting table, two control assemblies and a contact holding assembly. The upper end of the pipe cutting table is provided with a following moving seat through a sliding adaptive assembly. The sliding adaptive assembly comprises two stable sliding rods. The side, away from the stable sliding rods, of the following moving seat is provided with a cutting control console. In the cutting operation during the continuous production process of the titanium welded pipe, when the titanium welded pipe moves into the cutting equipment or the cutting machine, fixed-length detection is performed through an existing sensing module. When fixed-length cutting is required, the following moving seat moves along with the titanium welded pipe through the cooperation of the control assembly and the contact holding assembly. The titanium welded pipe is stably cut during the movement. The smoke and dust in the cutting process can be treated and the titanium welded pipe with a thin wall can be cut while the shape is maintained through the action of a plurality of smoke and dust suction holes and holding suction discs.

Description

Technical Field

[0001] This invention relates to the field of titanium tube cutting technology, specifically to a fixed-length cutting device for processing titanium welded pipes. Background Technology

[0002] Titanium welded pipe is made by rolling titanium and titanium alloy coils or strips or wide plates into tubular shapes and then welding them. Titanium welded pipe has uniform wall thickness, good concentricity, high surface finish, high material utilization and production efficiency, short production process, good finished product consistency, and less limitation on pipe length. It can be used to make straight pipes and products of various diameters. In particular, for high-strength, high-precision thin-walled titanium welded pipes, the product specifications and varieties are rich and can meet the extensive market demand of many industries such as energy and chemical industry, power engineering, marine desalination, automotive engineering, water treatment equipment, and air conditioning equipment.

[0003] Existing patent CN118808742A discloses a titanium alloy pipe cutting device for cutting titanium alloy pipes. An inner support assembly is fixedly connected to the inner sides of four clamping plates of a rotating clamping assembly. The inner support assembly includes two single support mechanisms connected by a telescopic cylinder, each supporting one side of the titanium alloy pipe to be cut. The device works in conjunction with a conveying mechanism to transport the titanium alloy pipe and provides support to the inner wall of the pipe. This design ensures stability during cutting of the titanium welded pipe by inserting the inner support assembly on one side. When the titanium welded pipe is under continuous roller pressure... During welding and cutting, titanium welded pipes need to be cut to a fixed length. Common internal support mechanisms cannot support the titanium welded pipes at this time. During fixed-length cutting, sensors are mainly used to measure the titanium welded pipe as it passes. When the appropriate length is reached, the cutting equipment moves to cut the titanium welded pipe. During the cutting operation, since the pipeline is constantly moving, the cutting equipment needs to be coordinated and moved synchronously by the drive equipment to achieve fixed-length cutting during the movement process. However, the externally compensated movement speed is prone to deviation from the pipeline movement speed, affecting the accuracy of fixed-length cutting. Moreover, when the titanium welded pipe wall thickness is small, deformation of the titanium welded pipe may occur during the cutting process. Summary of the Invention

[0004] The purpose of this invention is to provide a fixed-length cutting device for processing titanium welded pipes, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a fixed-length cutting device for processing titanium welded pipes, comprising:

[0006] A pipe cutting table, wherein a following moving seat is provided on the upper end of the pipe cutting table via a sliding adaptation component, the sliding adaptation component includes two stabilizing slide rods, a cutting control console is provided on the side of the following moving seat away from the stabilizing slide rods, and a cutting blade is movably mounted on one side of the cutting control console;

[0007] Two control components are respectively located on both sides of the upper end of the following moving seat. Each control component includes a control seat, a control piston plate, and a U-shaped control tube. The control piston plate is movably inserted into the control seat, and the U-shaped control tube is movably inserted into one side of the control seat. Two movable guide grooves are symmetrically opened at the lower end of the control seat, and guide arms are horizontally movably inserted into each movable guide groove.

[0008] The contact holding assembly is located between two control seats. The contact holding assembly includes four assembly boxes and four combined arc blocks. One side of each of the four assembly boxes is connected to one of the four guide arms. The four combined arc blocks are arranged in pairs to form a ring structure, and the inner arc surface of each combined arc block is symmetrically provided with several holding suction cups.

[0009] Preferably, the two stabilizing slide rods are horizontally and symmetrically arranged on both sides of the upper end of the pipe cutting table. The stabilizing slide rods are aligned with the pipeline movement direction of the titanium welded pipe. The following moving seat is movably sleeved on the two stabilizing slide rods. The stabilizing slide rods are elastically sleeved with a return spring facing the pipeline movement direction of the titanium welded pipe, and one side of the return spring is in contact with the following moving seat.

[0010] Preferably, the control seat has a piston groove, the control piston plate is vertically inserted into the piston groove, one side of each of the two U-shaped control tubes is horizontally movable through the two control seats on opposite sides and inserted into the piston groove, the side of the U-shaped control tube in the piston groove is connected to the center of one side of the control piston plate, the control piston plate has a central cavity groove, and the U-shaped control tube is connected to the central cavity groove.

[0011] Preferably, the two sides of the control piston plate are respectively arranged in a circumferential array with a plurality of pull-back boxes and a plurality of connecting rings. The plurality of pull-back boxes and the plurality of connecting rings are arranged opposite to each other. The connecting rings and the central cavity groove are connected to a sealing groove. A valve stem is movably inserted into the center of each sealing groove. One side of the valve stem is inserted into the pull-back box and is provided with an anti-dislodgement block. A pull-back spring is sleeved on the side of the valve stem placed in the pull-back box.

[0012] Preferably, the valve stem passes through one side of the connecting ring and is provided with a one-way sealing block. The one-way sealing block is a conical structure. A negative pressure suction tube connector is provided on the upper end of the piston groove near the one-way sealing block and away from the U-shaped control tube.

[0013] Preferably, a synchronization box is horizontally provided on the side of the U-shaped control tube away from the control piston plate, and the two guide arms are fixedly connected to the synchronization box on the side of the movable guide groove. The end of the guide arm that passes through the movable guide groove and is away from the synchronization box is vertically provided with an installation section. The lower ends of the two assembly boxes are respectively fitted with the installation sections of the two guide arms, and the cross-sections of the guide arms and the assembly boxes are both square structures.

[0014] Preferably, the combined arc-shaped block is located on one side of the assembly box, and there is a certain gap between the two guide arms. After the two combined arc-shaped blocks are fixedly connected to the two guide arms through the assembly box, there is a movement gap between the two combined arc-shaped blocks. The gap between the two combined arc-shaped blocks is greater than the thickness of the cutting blade, and the center of the gap between the cutting blade and the two combined arc-shaped blocks is in the same vertical plane.

[0015] Preferably, the assembly box is provided with an assembly bolt that is rotatably inserted through a constraint ring, the synchronization box is provided with a first air groove, and the guide arm is provided with a second air groove. One side of the first air groove is connected to the U-shaped control tube, and the two second air grooves are respectively connected to the two first air grooves. The center of the installation section of the guide arm that is inserted into the assembly box is provided with a fixing screw groove, and the lower end of the assembly bolt is inserted into the fixing screw groove of the guide arm through a thread.

[0016] Preferably, the combined arc-shaped block has an application groove, the assembly box has a transfer groove, one side of the application groove and the transfer groove have a connecting hole, and the assembly bolt has a transfer groove connecting the second air groove and the transfer groove.

[0017] Preferably, the cross-section of the application groove is L-shaped. The horizontal section of the application groove passes through the inner arc surface of the combined arc block and has several mounting holes. Several retaining suction cups are respectively inserted into the several mounting holes and connected to the application groove. The two combined arc blocks of the control base have filling grooves on opposite sides. The vertical section of the application groove has several smoke and dust suction holes connected to the filling grooves. Filter cotton strips are inserted into the filling grooves, and the number of smoke and dust suction holes is less than the number of retaining suction cups.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] During the cutting operation in the continuous production process of titanium welded pipe, when the titanium welded pipe moves into the cutting equipment or cutting machine tool, the existing sensing module performs fixed-length detection. When fixed-length cutting is required, the control component and the contact holding component cooperate to make the following moving seat move along with the titanium welded pipe. During the movement, the titanium welded pipe is cut stably. With the help of several dust suction holes and holding suction cups, the dust during the cutting process can be treated and the shape of the titanium welded pipe with thin wall can be maintained during the cutting. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 For the present invention Figure 1 Schematic diagram of part A;

[0022] Figure 3 This is a schematic diagram of the mounting structure of the following moving base of the present invention;

[0023] Figure 4 For the present invention Figure 3 Schematic diagram of part B;

[0024] Figure 5 For the present invention Figure 4 Schematic diagram of part C;

[0025] Figure 6 This is a schematic diagram of the following moving seat structure of the present invention;

[0026] Figure 7 This is a schematic diagram of a partial side-section of the following moving seat structure of the present invention;

[0027] Figure 8 For the present invention Figure 7 Schematic diagram of part D;

[0028] Figure 9 For the present invention Figure 8 Schematic diagram of part E;

[0029] Figure 10 This is a side-cut schematic diagram of the installation of the combined arc-shaped block of the present invention;

[0030] Figure 11 For the present invention Figure 10 Schematic diagram of part F;

[0031] Figure 12 This is an exploded view showing the connection between the combined arc-shaped block and the following moving seat of the present invention.

[0032] In the diagram: 1. Pipe cutting table; 2. Follower moving seat; 3. Stabilizing slide bar; 4. Return spring; 5. Cutting control console; 6. Cutting blade; 7. Control seat; 8. Piston groove; 9. Control piston plate; 10. Centralized cavity groove; 11. Pull-back box; 12. Connecting ring; 13. Valve stem; 14. One-way sealing block; 15. Pull-back spring; 16. U-shaped control tube; 17. Synchronization box; 18. Guide arm; 19. Assembly box; 20. Combined arc block; 22. Holding suction cup; 23. First air groove; 24. Second air groove; 25. Transfer groove; 26. Assembly bolt; 27. Adapter groove; 28. Connecting hole; 29. ​​Filling groove; 30. Smoke suction hole; 31. Filter cotton strip; 32. Negative pressure suction tube connector; 33. Movable guide groove; 34. Fixing screw groove; 35. Application groove. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Please see the appendix Figures 1-12 This application provides the following technical solutions.

[0035] Example 1: A fixed-length cutting device for processing titanium welded pipes includes a pipe cutting table 1. A following moving seat 2 is provided on the upper end of the pipe cutting table 1 via a sliding adaptation component. The sliding adaptation component includes two stabilizing slide rods 3. A cutting control console 5 is provided on the side of the following moving seat 2 away from the stabilizing slide rods 3. A cutting blade 6 is movably mounted on one side of the cutting control console 5. The two stabilizing slide rods 3 are horizontally symmetrically arranged on both sides of the upper end of the pipe cutting table 1. The stabilizing slide rods 3 are aligned with the direction of movement of the titanium welded pipe. The following moving seat 2 is movably sleeved on the two stabilizing slide rods 3. A return spring 4 is elastically sleeved on the stabilizing slide rods 3 facing the direction of movement of the titanium welded pipe, and one side of the return spring 4 is in contact with the following moving seat 2. The following moving seat 2 can drive the cutting control console 5 and the cutting blade 6 to slide adaptively to accommodate the cutting process of the titanium welded pipe during its movement.

[0036] Two control components are set up to control whether the following moving seat 2 moves synchronously with the titanium welded pipe. The two control components are respectively located on both sides of the upper end of the following moving seat 2. Each control component includes a control seat 7, a control piston plate 9, and a U-shaped control tube 16. The control piston plate 9 is movably inserted into the control seat 7, and the U-shaped control tube 16 is movably inserted into one side of the control seat 7. Two movable guide grooves 33 are symmetrically opened at the lower end of the control seat 7, and guide arms 18 are horizontally movably inserted into each of the movable guide grooves 33. A piston groove 8 is opened inside the control seat 7. The piston plate 9 is vertically inserted into the piston groove 8. One side of each of the two U-shaped control tubes 16 is horizontally movable through the two control seats 7 on opposite sides and inserted into the piston groove 8. The side of the U-shaped control tube 16 in the piston groove 8 is connected to the center of one side of the control piston plate 9. A central cavity groove 10 is opened in the control piston plate 9, and the U-shaped control tube 16 is connected to the central cavity groove 10. When the negative pressure suction tube connector 32 is used in conjunction with the negative pressure suction equipment, the U-shaped control tube 16 can be controlled to slide horizontally by the control piston plate 9.

[0037] The control piston plate 9 has several pull-back boxes 11 and connecting rings 12 arranged in a circular array on both sides. The pull-back boxes 11 and connecting rings 12 are arranged opposite each other. The connecting rings 12 and the centralized cavity groove 10 are connected to a sealing groove. A valve stem 13 is movably inserted into the center of each sealing groove. One side of the valve stem 13 is inserted into the pull-back box 11 and is provided with an anti-dislodgement block. A pull-back spring 15 is sleeved on the side of the valve stem 13 placed in the pull-back box 11. One side of the valve stem 13 passes through the connecting ring 12 and is provided with a one-way sealing block 1. 4. The one-way blocking block 14 is designed with a conical structure. The upper end of the side of the piston groove 8 that is close to the one-way blocking block 14 and away from the U-shaped control tube 16 is connected to a negative pressure suction tube connector 32. When the control piston plate 9 cannot move, the negative pressure suction tube connector 32 continuously performs negative pressure suction. At this time, the one-way blocking block 14 can pull the valve stem 13 to squeeze the pullback spring 15, so that the negative pressure force acts on the centralized cavity groove 10 and the U-shaped control tube 16 through several connecting rings 12, thereby completing the movement control of the U-shaped control tube 16.

[0038] A contact holding assembly is installed to support and maintain the posture of the passing titanium welded pipe. The contact holding assembly is located between two control seats 7 and includes four assembly boxes 19 and four combined arc-shaped blocks 20. One side of each of the four assembly boxes 19 is connected to one of four guide arms 18. The four combined arc-shaped blocks 20 are arranged in pairs to form a ring structure, and each of the inner arc surfaces of the combined arc-shaped blocks 20 is symmetrically equipped with several holding suction cups 22. A synchronization box 17 is horizontally located on the side of the U-shaped control tube 16 away from the control piston plate 9. One side of each of the two guide arms 18, passing through the movable guide groove 33, is fixedly connected to the synchronization box 17. An installation section is vertically provided at one end of the support arm 18 that passes through the movable guide groove 33 and is away from the synchronization box 17. The lower ends of the two assembly boxes 19 are respectively fitted with the installation sections of the two guide arms 18. The cross sections of the guide arms 18 and the assembly boxes 19 are both square structures. When the U-shaped control tube 16 moves horizontally, the horizontal push of the two guide arms 18 by the synchronization box 17 can control the four combined arc blocks 20 on both sides to contact the passing titanium welded pipe. The virtual axis of the inner arc surface of the combined arc block 20 is the same as the axis of the passing titanium welded pipe, so that the four combined arc blocks 20 can symmetrically cover and clamp the titanium welded pipe on both sides.

[0039] Then, under the action of the moving titanium welded pipe, the combined arc block 20 and the following moving seat 2 are controlled to slide along the stabilizing slide bar 3. When the following moving seat 2 starts to move, the cutting console 5 drives the cutting blade 6 to descend through the motor to move and cut the titanium welded pipe.

[0040] The combined arc block 20 is located on one side of the assembly box 19. There is a certain gap between the two guide arms 18. After the two combined arc blocks 20 are fixedly connected to the two guide arms 18 through the assembly box 19, there is a movement gap between the two combined arc blocks 20. The gap between the two combined arc blocks 20 is greater than the thickness of the cutting blade 6, and the center of the gap between the cutting blade 6 and the two combined arc blocks 20 is in the same vertical plane. When the cutting blade 6 cuts the titanium welded pipe, the two cutting blades 6 clamp and position the two sides of the cutting position, and do not affect the downward cutting operation of the cutting blade 6.

[0041] Assembly box 19 has an assembly bolt 26 rotatably inserted into it via a constraint ring. Synchronization box 17 has a first air groove 23, and guide arms 18 each have a second air groove 24. One side of the first air groove 23 is connected to the U-shaped control pipe 16, and the two second air grooves 24 are respectively connected to the two first air grooves 23. The center of the installation section of the guide arm 18 that inserts into the assembly box 19 has a fixing screw groove 34. The lower end of the assembly bolt 26 is threaded into the fixing screw groove 34 of the guide arm 18. An arc-shaped block 20 has an application groove 35 inside it. The assembly box 19 has a transfer groove 25 for application... A connecting hole 28 is provided on one side of the groove 35, which is connected to the transfer groove 25. A transition groove 27 is provided in the assembly bolt 26, which connects the second air groove 24 and the transfer groove 25. When the combined arc block 20 is connected to the guide arm 18, the assembly bolt 26 in the assembly box 19 is used to quickly and stably connect to the guide arm 18 through the thread. The operation is simple and convenient. At the same time, the assembly bolt 26 with the transition groove 27 can connect the application groove 35 in the combined arc block 20 to the U-shaped control tube 16, so that the negative pressure suction force of the U-shaped control tube 16 under the action of the negative pressure suction tube connector 32 is applied to the application groove 35.

[0042] The cross-section of the cutting groove 35 is L-shaped. The horizontal section of the cutting groove 35 passes through the inner arc surface of the combined arc block 20 and has several mounting holes. Several retaining suction cups 22 are respectively inserted into the mounting holes and connected to the cutting groove 35. When the inner arc surface of the combined arc block 20 contacts the surface of the titanium welded pipe, the several retaining suction cups 22 are adsorbed on the surface of the titanium welded pipe by the negative pressure in the cutting groove 35, which adsorbs and supports the deformation of the titanium welded pipe under force during the cutting process and improves the cutting quality.

[0043] In this embodiment: when the length of the moving titanium welded pipe is detected by the length sensing module to reach the cutting standard, the negative pressure suction pipe connector 32 responds quickly through the negative pressure suction device. The negative pressure suction control controls the piston plate 9 and the U-shaped control pipe 16 to move towards the position of the titanium welded pipe. At this time, the four combined arc blocks 20 clamp the titanium welded pipe. Under the action of the moving titanium welded pipe, the combined arc blocks 20 control the following moving seat 2 to slide along the stabilizing slide bar 3. When the following moving seat 2 starts to move, the cutting console 5 drives the cutting blade 6 to descend through the motor to move and cut the titanium welded pipe. During this period, although the combined arc blocks 20 clamp and position the titanium welded pipe on both sides of the cutting position, when the negative pressure suction pipe connector 32 continues to perform negative pressure suction, the one-way sealing block 14 can pull the valve stem 1. 3. The compression spring 15 is connected to the negative pressure suction pipe connector 32 through the connecting ring 12. The negative pressure suction pipe connector 32 generates negative pressure suction. Under the action of the concentrated cavity 10, U-shaped control pipe 16, first air groove 23, second air groove 24, transition groove 27 and connecting hole 28, the pipe is applied to the groove 35. At this time, several holding suction cups 22 are disturbed by negative pressure. The holding suction cups 22 adsorb and restrain the wall of the titanium welded pipe to avoid deformation of the titanium welded pipe during the cutting process. The elastic structure of the holding suction cups 22 can prevent damage to the pipe body when the combined arc block 20 is clamped with the titanium welded pipe. In addition, when it is necessary to cut a titanium welded pipe with a larger diameter, it is only necessary to replace the combined arc block 20 of the corresponding size and keep the virtual axis of the combined arc block 20 coaxial with the pipeline of the titanium welded pipe.

[0044] Example 2: Based on Example 1, the two combined arc blocks 20 of the control base 7 are provided with filling grooves 29 on opposite sides. The vertical section of the application groove 35 is connected to the filling grooves 29 and has several dust suction holes 30. Filter strips 31 are inserted into the filling grooves 29. The number of dust suction holes 30 is less than the number of holding suction cups 22. When the application groove 35 generates negative pressure, the dust suction holes 30 on the side of the combined arc block 20 near the cutting blade 6 can separate a portion of the cutting dust under the action of negative pressure in the application groove 35 and concentrate it for subsequent processing. The dust generated by cutting will not cause excessive pollution to the internal groove after being filtered by the filter strips 31, thus improving the quality of the cutting working environment.

[0045] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fixed-length cutting device for processing titanium welded pipes, characterized in that, include: A pipe cutting table (1) is provided with a following moving seat (2) at the upper end of the pipe cutting table (1) through a sliding adaptation component. The sliding adaptation component includes two stabilizing slide rods (3). A cutting control console (5) is provided on the side of the following moving seat (2) away from the stabilizing slide rods (3). A cutting blade (6) is movably installed on one side of the cutting control console (5). Two control components are respectively located on both sides of the upper end of the following moving seat (2). The control components include a control seat (7), a control piston plate (9), and a U-shaped control tube (16). The control piston plate (9) is movably inserted into the control seat (7), and the U-shaped control tube (16) is movably inserted into one side of the control seat (7). Two movable guide grooves (33) are symmetrically opened at the lower end of the control seat (7). Guide arms (18) are horizontally movably inserted into the movable guide grooves (33). The contact holding assembly is located between two control seats (7). The contact holding assembly includes four assembly boxes (19) and four combined arc blocks (20). One side of each of the four assembly boxes (19) is connected to one of the four guide arms (18). The four combined arc blocks (20) are arranged in pairs to form a ring structure, and the inner arc surface of each combined arc block (20) is symmetrically provided with several holding suction cups (22). The two stabilizing slide rods (3) are horizontally and symmetrically arranged on both sides of the upper end of the tube cutting table (1). Consistent with the direction of pipeline movement of the titanium welded pipe, the following moving seat (2) is movably sleeved on two stabilizing slide rods (3). The stabilizing slide rods (3) are elastically sleeved with a return spring (4) facing the direction of pipeline movement of the titanium welded pipe, and one side of the return spring (4) is in contact with the following moving seat (2). The control seat (7) is provided with a piston groove (8). The control piston plate (9) is vertically inserted into the piston groove (8). One side of the two U-shaped control tubes (16) respectively moves horizontally through the two control seats (7) on opposite sides and is inserted into the piston groove (8). Inside the piston groove (8), one side of the U-shaped control tube (16) is connected to the center of one side of the control piston plate (9). The control piston plate (9) has a central cavity groove (10), and the U-shaped control tube (16) is connected to the central cavity groove (10). The two sides of the control piston plate (9) are respectively arranged in a circular array of several pull-back boxes (11) and connecting rings (12). The pull-back boxes (11) and connecting rings (12) are arranged opposite to each other. The connecting rings (12) and the central cavity groove (10) are connected together with a sealing groove to seal the... A valve stem (13) is movably inserted into the center of each plug groove. One side of the valve stem (13) is inserted into the pull-back box (11) and is provided with an anti-detachment block. A pull-back spring (15) is sleeved on the side of the valve stem (13) placed in the pull-back box (11). The valve stem (13) passes through one side of the connecting ring (12) and is provided with a one-way sealing block (14). The one-way sealing block (14) is set with a conical structure. A negative pressure suction pipe connector (32) is connected to the upper end of the side of the piston groove (8) close to the one-way sealing block (14) and away from the U-shaped control tube (16).

2. The fixed-length cutting device for processing titanium welded pipes according to claim 1, characterized in that: The U-shaped control tube (16) has a horizontally arranged synchronization box (17) on the side away from the control piston plate (9). Two guide arms (18) pass through the movable guide groove (33) and are fixedly connected to the synchronization box (17) on one side. The guide arms (18) pass through the movable guide groove (33) and have a vertically arranged installation section at the end away from the synchronization box (17). The lower ends of the two assembly boxes (19) are respectively fitted with the installation sections of the two guide arms (18), and the cross-sections of the guide arms (18) and the assembly boxes (19) are both square structures.

3. The fixed-length cutting device for processing titanium welded pipes according to claim 2, characterized in that: The combined arc block (20) is located on one side of the assembly box (19). There is a certain gap between the two guide arms (18). After the two combined arc blocks (20) are fixedly connected to the two guide arms (18) through the assembly box (19), there is a movement gap between the two combined arc blocks (20). The gap between the two combined arc blocks (20) is greater than the thickness of the cutting blade (6), and the center of the gap between the cutting blade (6) and the two combined arc blocks (20) is in the same vertical plane.

4. The fixed-length cutting device for processing titanium welded pipes according to claim 3, characterized in that: The assembly box (19) is provided with an assembly bolt (26) that is rotatably inserted through a constraint ring. The synchronization box (17) is provided with a first air groove (23). The guide arm (18) is provided with a second air groove (24). One side of the first air groove (23) is connected to the U-shaped control tube (16). The two second air grooves (24) are respectively connected to the two first air grooves (23). The center of the installation section of the guide arm (18) that is inserted into the assembly box (19) is provided with a fixing screw groove (34). The lower end of the assembly bolt (26) is inserted into the fixing screw groove (34) of the guide arm (18) through a thread.

5. A fixed-length cutting device for processing titanium welded pipes according to claim 4, characterized in that: The combined arc-shaped block (20) has an application groove (35) inside, the assembly box (19) has a transfer groove (25) inside, one side of the application groove (35) and the transfer groove (25) has a connecting hole (28) inside, and the assembly bolt (26) has a transfer groove (27) connecting the second air groove (24) and the transfer groove (25).

6. The fixed-length cutting device for processing titanium welded pipes according to claim 5, characterized in that: The cross-section of the application groove (35) is L-shaped. The horizontal section of the application groove (35) passes through the inner arc surface of the combined arc block (20) and has several mounting holes. Several retaining suction cups (22) are respectively inserted into the several mounting holes and connected to the application groove (35). The two combined arc blocks (20) of the control seat (7) are provided with filling grooves (29) on opposite sides. Several smoke and dust suction holes (30) are provided in the vertical section of the application groove (35) connected to the filling grooves (29). Filter cotton strips (31) are inserted into the filling grooves (29), and the number of smoke and dust suction holes (30) is less than the number of retaining suction cups (22).

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