Three-end cutting device for precision welded pipe

Abstract

The invention discloses a precision welded pipe three-head cutting device, and belongs to the technical field of welded pipe machining. The precise welded pipe three-head cutting device comprises a supporting mechanism, a cutting mechanism and a clamping mechanism, the supporting mechanism comprises a portal frame, supporting frames are fixedly installed at the two ends of the portal frame, and a track beam and a rectangular beam are installed at the upper end and the lower end of the portal frame correspondingly; the cutting mechanism comprises three moving frames, fixing seats are installed on one sides of the upper ends of the moving frames, sliding rollers are connected into the fixing seats and slidably connected with the track beam, side pulleys are installed on the two sides of the bottom ends of the three moving frames, one sides of the side pulleys abut against one side of the rectangular beam, and first V-shaped clamping blocks are fixedly installed on the bottom sides of the moving frames. And the clamping mechanism comprises three bases, the three bases are arranged on one side of the portal frame correspondingly, clamp frames are installed on the upper end faces of the bases in a sliding mode, and one sides of the clamp frames are connected with blanking stop levers.

Description

Technical Field

[0001] The present invention relates to the technical field of welded pipe processing, and specifically to a precision welded pipe three-head cutting device. Background Art

[0002] After the straight seam welded pipe blank pipe undergoes drawing and precision straightening processes, it needs to be cut. The cutting process mainly includes cutting off the pointed head, cutting off the deformed section at the tail after drawing, and cutting the remaining part according to the length dimension required by the customer.

[0003] Based on the above, the inventor of the present invention found the following problems: In the traditional welded pipe cutting process, cutting off the pointed head, cutting off the deformed section at the tail, and cutting the remaining part according to the length dimension required by the customer need to be carried out on different devices respectively, or completed on the same device by adjusting the tooling and cutting parameters multiple times. Each time the cutting task is switched, a large amount of time is spent on equipment debugging and positioning, which not only lengthens the processing cycle of single welded pipe cutting, but also reduces the actual production capacity of the equipment.

[0004] In view of this, research and improvement are carried out on the existing structure and deficiencies, and a precision welded pipe three-head cutting device is provided, in order to achieve a more practical value purpose. Summary of the Invention

[0005] The purpose of the present invention is to provide a precision welded pipe three-head cutting device to solve the problem proposed in the above background art that in the traditional welded pipe cutting process, cutting off the pointed head, cutting off the deformed section at the tail, and cutting the remaining part according to the length dimension required by the customer need to be carried out on different devices respectively, or completed on the same device by adjusting the tooling and cutting parameters multiple times.

[0006] In view of the above problems, the technical solution proposed by the present invention is:

[0007] A precision welded pipe three-head cutting device includes a support mechanism, a cutting mechanism, and a clamping mechanism. The support mechanism includes a gantry. Both ends of the gantry are fixedly installed with support frames. A track beam and a rectangular beam are respectively installed at the upper and lower ends of the gantry. The cutting mechanism includes three moving frames. A fixed seat is installed on one side of the upper end of each moving frame. A sliding roller is connected inside each fixed seat. The sliding roller is slidably connected with the track beam. Side pulleys are installed on both sides of the bottom ends of the three moving frames. One side of the side pulley abuts against one side of the rectangular beam. A first V-shaped clamping block is fixedly installed on the bottom side of each moving frame. The clamping mechanism includes three bases. The three bases are respectively arranged on one side of the gantry. A fixture frame is installed on the upper end surface of each base. A blanking stop rod is connected to one side of the fixture frame. A second V-shaped clamping block is installed on one side of the upper end of the fixture frame.

[0008] Furthermore, a mounting frame is installed on one side of the movable frame, slide rails are installed on both sides of the interior of the mounting frame, and a reducer is installed between the slide rails.

[0009] The beneficial effect of adopting the above further solution is that the mounting frame on one side of the movable frame provides a mounting carrier for the reducer, and the slide rail enables the reducer to be flexibly moved, which facilitates the adjustment of the position of the cutting disc to meet different cutting requirements.

[0010] Furthermore, a hydraulic cylinder is fixedly mounted on the upper end of the mounting frame, and a movable end of the hydraulic cylinder is fixedly connected to the inner side of the reducer.

[0011] The beneficial effect of adopting the above further solution is that the hydraulic cylinder at the upper end of the mounting frame can push the reducer to move along the slide rail, control the feed amount of the cutting disc, and ensure cutting accuracy.

[0012] Furthermore, a cutting disc can be installed at the output end of the reducer, a safety shield is fixedly installed on the outside of the cutting disc of the reducer, a servo motor is installed at the upper end of the reducer, and the output end of the servo motor is transmission-connected to the input end of the reducer.

[0013] The beneficial effect of adopting the above further scheme is that the servo motor provides stable power for the reducer, drives the cutting disc to rotate, and realizes efficient cutting of the welded pipe. The safety shield on the outside of the cutting disc effectively prevents cutting debris from splashing, ensuring the safety of the operator.

[0014] Furthermore, a strip groove is provided at the bottom end of the rectangular beam, and three locking bolts are slidably inserted inside the strip groove. The bottom ends of the three locking bolts respectively pass through the bottom sides of the three moving frames and extend to the outside, and are all connected with locking nuts.

[0015] The beneficial effect of adopting the above further solution is that the strip groove, locking bolt and locking nut at the bottom end of the rectangular beam cooperate with each other to fix the movable frame at a specified position, ensuring accurate positioning of the welded pipe during cutting and improving cutting quality.

[0016] Furthermore, a first cylinder is fixedly mounted on one side of the upper end of the clamp frame, and a movable end of the first cylinder is fixedly connected to the second V-shaped clamp block.

[0017] The beneficial effect of adopting the above further solution is that the first cylinder at the upper end of the clamp frame can quickly push the second V-shaped clamp block to move, thereby achieving rapid clamping and loosening of the welded pipe, greatly improving work efficiency.

[0018] Furthermore, a movable seat is fixedly installed on the bottom side of the clamp frame, and a second cylinder is hinged inside the movable seat through a pin shaft, and the movable end of the second cylinder is connected to the outer side of one end of the blanking blocking rod.

[0019] The beneficial effect of adopting the above further solution is that the movable seat, the second cylinder and the blanking stop rod on the bottom side of the fixture rack cooperate with each other to control the angle of the blanking stop rod, so as to conveniently catch the cut welded pipe. When one end of the second cylinder drives it to descend, the welded pipe can be guided to slide into the interior of the storage rack, facilitating the subsequent collection and sorting of the cut welded pipes.

[0020] Furthermore, it further includes a feeding mechanism, a storage rack and a guiding rack. The feeding mechanism includes three pairs of feeding racks, and each pair of the feeding racks is respectively arranged on both sides of the three bases. The storage rack is arranged on the bottom side of a pair of the support frames, and the bottom side of the guiding rack is fixedly connected to a pair of the support frames.

[0021] The beneficial effect of adopting the above further solution is that the feeding racks of the feeding mechanism are convenient for storing the welded pipes to be cut, the storage rack stores the cut welded pipes, and the guiding rack guides the moving direction of the welded pipes, enabling the feeding, cutting and storage processes to proceed in an orderly manner and improving the overall working efficiency.

[0022] Furthermore, a V-shaped rack is fixedly installed on the upper end surface of the storage rack. Buffer pads are arranged on both sides inside the V-shaped rack. An inclined plate is installed at the top end of the guiding rack, and the bottom end of the inclined plate faces the V-shaped rack. A feeding stop rod is welded to one side of the upper end of each pair of the feeding racks.

[0023] The beneficial effect of adopting the above further solution is that the V-shaped rack on the storage rack stably supports the cut welded pipes, facilitating the bundling and transportation of the cut welded pipes. By installing buffer pads, scratching of the welded pipes by the V-shaped rack can be avoided, and the noise generated during impact can also be reduced. The inclined plate at the top end of the guiding rack guides the welded pipes to smoothly fall into the V-shaped rack, and the feeding stop rods on the feeding racks limit the welded pipes to be cut on the feeding racks, facilitating workers to take materials in an orderly manner.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows: For this precision welded pipe three-head cutting device, the gantry and support frame of the support mechanism build a stable support framework. The track beam and rectangular beam provide guidance and support for the moving frame of the cutting mechanism. The cooperation of the sliding rollers with the track beam and the side pulleys with the rectangular beam enables the moving frame to move smoothly, thus facilitating the cutting of different positions of the welded pipe. The first V-shaped clamping block assists in fixing the welded pipe, and the base and fixture frame of the clamping mechanism cooperate with the second V-shaped clamping block to achieve stable clamping of the welded pipe. The blanking stop rod controls the blanking of the welded pipe. The slidably mounted fixture frame can move left and right to match the position of the moving frame, improving the firmness of clamping the welded pipe by the first V-shaped clamping block and the second V-shaped clamping block. The strip-shaped groove, locking bolt, and locking nut at the bottom end of the rectangular beam cooperate with each other to fix the moving frame at a specified position, ensuring accurate positioning of the length of the welded pipe to be cut during the cutting process and improving the cutting quality. The movable seat, third cylinder, and blanking stop rod at the bottom side of the fixture frame cooperate with each other to control the angle of the blanking stop rod, thus facilitating the catching of the cut welded pipe. When the third cylinder drives one end thereof to descend, it can guide the welded pipe to slide into the interior of the storage rack, facilitating the subsequent collection and sorting of the cut welded pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic side view disclosed in an embodiment of the present invention;

[0026] Figure 2 It is a schematic front view disclosed in an embodiment of the present invention;

[0027] Figure 3 It is a schematic side view of the cutting mechanism and the gantry disclosed in an embodiment of the present invention;

[0028] Figure 4 It is a schematic side view of the fixture frame disclosed in an embodiment of the present invention;

[0029] Figure 5 Disclosed in an embodiment of the present invention Figure 1 Schematic enlarged view of the structure of structure A therein.

[0030] In the figure: 100, storage rack; 101, clamping mechanism; 10101, base; 10102, fixture frame; 10103, blanking stop rod; 10104, movable seat; 10105, second cylinder; 10106, second V-shaped clamping block; 10107, first cylinder; 102, support mechanism; 10201, gantry; 10202, support frame; 10203, track beam; 10204, rectangular beam; 10205, strip-shaped groove; 10206, locking nut; 10207, locking bolt; 103, cutting mechanism; 10301, moving frame; 10302, speed reducer;

[0031] 10303. Servo motor; 10304. Safety protection cover; 10305. Cutting disc; 10306. Side pulley; 10307. Slide rail;

[0032] 10308. Fixed seat; 10309. Slide roller; 10310. Hydraulic cylinder; 10311. First V-shaped clamping block; 10312. Mounting bracket; 104. Loading mechanism; 10401. Loading rack; 10403. Loading stop bar; 105. V-shaped frame; 106. Guide frame; 107. Inclined plate. Detailed implementation manners

[0033] To make the objectives, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below with reference to the accompanying drawings in this application. Apparently, the described embodiments are some but not all of the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts shall fall within the scope of protection of this application.

[0034] The terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features; in the description of this application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0035] Embodiment 1

[0036] Please refer to Figure 1 - Figure 5, the present invention provides a technical solution: a precision welded pipe three - head cutting device, including a support mechanism 102 and a cutting mechanism 103. The support mechanism 102 includes a gantry 10201. Both ends of the gantry 10201 are fixedly installed with support frames 10202. The upper and lower ends of the gantry 10201 are respectively installed with a track beam 10203 and a rectangular beam 10204; the cutting mechanism 103 includes three moving frames 10301. On one side of the upper end of each moving frame 10301, a fixed seat 10308 is installed. Inside each fixed seat 10308, a sliding roller 10309 is connected. The sliding roller 10309 is slidably connected to the track beam 10203. On both sides of the bottom end of the three moving frames 10301, side pulleys 10306 are installed. One side of the side pulley 10306 abuts against one side of the rectangular beam 10204. On the bottom side of each moving frame 10301, a first V - shaped clamping block 10311 is fixedly installed. The clamping mechanism 101 includes three bases 10101. The three bases 10101 are respectively arranged on one side of the gantry 10201. On the upper end surface of each base 10101, a fixture frame 10102 is installed. On one side of the upper end of the fixture frame 10102, a blanking stop rod 10103 is connected. On one side of the upper end of the fixture frame 10102, a second V - shaped clamping block 10106 is slidably installed. The gantry 10201 and the support frames 10202 of the support mechanism 102 build a stable support framework. The track beam 10203 and the rectangular beam 10204 provide guidance and support for the moving frames 10301 of the cutting mechanism 103. The cooperation between the sliding roller 10309 and the track beam 10203, and the side pulley 10306 and the rectangular beam 10204 enables the moving frames 10301 to move smoothly, thus facilitating the cutting of different positions of the welded pipe. The first V - shaped clamping block 10311 assists in fixing the welded pipe. The bases 10101 and the fixture frames 10102 of the clamping mechanism 101 cooperate with the second V - shaped clamping block 10106 to achieve stable clamping of the welded pipe. The blanking stop rod 10103 controls the blanking of the welded pipe. The slidably installed fixture frame 10102 can move left and right to match the position of the moving frame 10301, improving the firmness of the clamping of the welded pipe by the first V - shaped clamping block 10311 and the second V - shaped clamping block 10106.

[0037] In the embodiment of the present invention, further, on one side of each moving frame 10301, an installation frame 10312 is installed. On both sides inside the installation frame 10312, slide rails 10307 are installed. Between the slide rails 10307, a speed reducer 10302 is slidably installed. The installation frame 10312 on one side of the moving frame 10301 provides an installation carrier for the speed reducer 10302. The slide rails 10307 enable the speed reducer 10302 to move flexibly, facilitating the adjustment of the position of the cutting disc 10305 to meet different cutting requirements.

[0038] In the embodiments of the present invention, further, hydraulic cylinders 10310 are fixedly installed at the upper ends of the mounting frames 10312. The moving ends of the hydraulic cylinders 10310 are fixedly connected to the inner sides of the speed reducers 10302. The hydraulic cylinders 10310 at the upper ends of the mounting frames 10312 can push the speed reducers 10302 to move along the slide rails 10307, control the feed amount of the cutting discs 10305, and ensure the cutting accuracy.

[0039] In the embodiments of the present invention, further, cutting discs 10305 can be installed at the output ends of the speed reducers 10302. Safety protective covers 10304 are fixedly installed outside the cutting discs 10305 on the speed reducers 10302. Servo motors 10303 are installed at the upper ends of the speed reducers 10302. The output ends of the servo motors 10303 are drivingly connected to the input ends of the speed reducers 10302. The servo motors 10303 provide stable power for the speed reducers 10302, drive the cutting discs 10305 to rotate, and achieve efficient cutting of the welded pipes. The safety protective covers 10304 outside the cutting discs 10305 effectively prevent the cutting debris from splashing and ensure the safety of the operators.

[0040] In the embodiments of the present invention, further, strip-shaped grooves 10205 are formed at the bottom ends of the rectangular beams 10204. Three locking bolts 10207 are slidably inserted into the strip-shaped grooves 10205. The bottom ends of the three locking bolts 10207 respectively penetrate through the bottom sides of the three moving frames 10301 and extend to the outside, and are all connected with locking nuts 10206. The strip-shaped grooves 10205, the locking bolts 10207 and the locking nuts 10206 at the bottom ends of the rectangular beams 10204 cooperate with each other to fix the moving frames 10301 at the designated positions, ensure the accurate positioning of the length of the welded pipe to be cut during the cutting process, and improve the cutting quality.

[0041] In the embodiments of the present invention, further, a first cylinder 10107 is fixedly installed on one side of the upper end of the fixture frame 10102. The moving end of the first cylinder 10107 is fixedly connected to the second V-shaped clamping block 10106. The first cylinder 10107 at the upper end of the fixture frame 10102 can quickly push the second V-shaped clamping block 10106 to move, realize the quick clamping and loosening of the welded pipe, and greatly improve the working efficiency.

[0042] In an embodiment of the present invention, further, a movable seat 10104 is fixedly installed on the bottom side of the fixture rack 10102. A second cylinder 10105 is hinged inside the movable seat 10104 through a pin shaft. The moving end of the second cylinder 10105 is connected to the outer side of one end of the blanking stop rod 10103. The movable seat 10104, the second cylinder 10105 and the blanking stop rod 10103 on the bottom side of the fixture rack 10102 cooperate with each other to control the angle of the blanking stop rod 10103, so as to facilitate catching the cut welded pipe. When the second cylinder 10105 drives one end of it to descend, the welded pipe can be guided to slide into the storage rack 100, which is convenient for the subsequent collection and sorting of the cut welded pipe.

[0043] In an embodiment of the present invention, further, it further includes a loading mechanism 104, a storage rack 100 and a guiding rack 106. The loading mechanism 104 includes three pairs of loading racks 10401, and each pair of loading racks 10401 are respectively arranged on both sides of three bases 10101. The storage rack 100 is arranged at the bottom side of a pair of support frames 10202. The bottom side of the guiding rack 106 is fixedly connected to a pair of support frames 10202. The loading racks 10401 of the loading mechanism 104 are convenient for storing the welded pipes to be cut. The storage rack 100 stores the cut welded pipes. The guiding rack 106 guides the moving direction of the welded pipes, so that the processes of loading, cutting and storing are carried out in an orderly manner, improving the overall working efficiency.

[0044] In an embodiment of the present invention, further, a V-shaped rack 105 is fixedly installed on the upper end surface of the storage rack 100. Buffer pads are provided on both sides inside the V-shaped rack 105. An inclined plate 107 is installed at the top end of the guiding rack 106, and the bottom end of the inclined plate 107 faces the V-shaped rack 105. A loading stop rod 10403 is welded to one side of the upper end of each pair of loading racks 10401. The V-shaped rack 105 on the storage rack 100 stably supports the cut welded pipes, which is convenient for bundling and transporting the cut welded pipes. And by installing buffer pads, it can avoid scratching the welded pipes by the V-shaped rack 105 and can also reduce the noise generated during impact. The inclined plate 107 at the top end of the guiding rack 106 guides the welded pipes to smoothly fall into the V-shaped rack 105. The loading stop rod 10403 on the loading rack 10401 limits the welded pipes to be cut on the loading rack 10401, which is convenient for workers to take materials in an orderly manner.

[0045] Specifically, the working principle of this precision welded pipe three-head cutting device is as follows: Before starting the precision welded pipe three-head cutting device, the operator first places the welded pipe to be cut on the loading rack 10401, and the loading stop bar 10403 limits the position of the welded pipe to facilitate subsequent material taking. After starting the device, according to the cutting requirements of the welded pipe, adjust the position of the moving frame 10301 on the track beam 10203 and the rectangular beam 10204. The moving frame 10301 slides along the track beam 10203 through the roller 10309 in the fixed seat 10308, and the side pulley 10306 at the bottom abuts against the rectangular beam 10204 to ensure smooth movement. After determining the position, use the locking bolt 10207 and the locking nut 10206 in the strip groove 10205 at the bottom of the rectangular beam 10204 to fix the moving frame 10301. At the same time, slide the fixture frame 10102 on the base 10101 to make its position match that of the moving frame 10301. Subsequently, start the first cylinder 10107 to push the second V-shaped clamping block 10106 to move, cooperate with the first V-shaped clamping block 10311 to firmly clamp the welded pipe. After preparation, start the servo motor 10303 to drive the cutting disc 10305 to rotate. At the same time, the hydraulic cylinder 10310 pushes the reducer 10302 to move along the slide rail 10307 to control the feed amount of the cutting disc 10305 and precisely cut the welded pipe. During the cutting process, the safety protective cover 10304 prevents cutting debris from splashing and ensures the safety of the operator. Use three cutting discs 10305 to synchronously cut the welded pipe, which greatly improves the cutting efficiency. After the welded pipe is cut off, start the second cylinder 10105. The second cylinder 10105 drives the blanking stop bar 10103 to rotate through the movable seat 10104, changes the angle of the blanking stop bar 10103, and guides the cut-off welded pipe to slide down. The welded pipe passes through the inclined plate 107 at the top of the guide frame 106 and falls into the V-shaped frame 105 on the storage rack 100. The buffer pads on both sides of the V-shaped frame 105 prevent the welded pipe from being scratched and reduce the impact noise. After one cutting is completed, the first cylinder 10107 drives the second V-shaped clamping block 10106 to release the welded pipe, and the second cylinder 10105 drives the blanking stop bar 10103 to reset. Repeat the above steps to perform the operations of loading, positioning, cutting, and blanking on the new welded pipe, and realize the continuous three-head cutting process of the welded pipe.

[0046] In several embodiments provided by the present application, it should be understood that the disclosed systems, modules, and methods can be implemented in other ways. For example, the module embodiments described above are only illustrative. For example, the division of units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point, the displayed or discussed coupling or direct coupling or communication connection between each other can be through some interfaces, and the indirect coupling or communication connection of modules or units can be in electrical, mechanical, or other forms.

[0047] The above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting it. The present application is not limited to the exact structures described above and illustrated in the drawings. It cannot be determined that the specific implementation of the present application is only limited to these descriptions. For those of ordinary skill in the technical field to which the present application belongs, without departing from the concept of the present application, various changes and deformations made shall be regarded as falling within the protection scope of the present application.

Claims

1. Precision welded pipe three-head cutting device, characterized in that, It includes a support mechanism (102), a cutting mechanism (103) and a clamping mechanism (101). The support mechanism (102) includes a gantry (10201), and support frames (10202) are fixedly installed at both ends of the gantry (10201). Rail beams (10203) and rectangular beams (10204) are respectively installed at the upper and lower ends of the gantry (10201); the cutting mechanism (103) includes three moving frames (10301). Fixed seats (10308) are installed on one side of the upper ends of the moving frames (10301). Slide rollers (10309) are connected inside the fixed seats (10308), and the slide rollers (10309) are slidably connected to the rail beams (10203). Side pulleys (10306) are installed on both sides of the bottom ends of the three moving frames (10301), and one side of the side pulleys (10306) abuts against one side of the rectangular beam (10204). First V-shaped clamping blocks (10311) are fixedly installed on the bottom sides of the moving frames (10301); the clamping mechanism (101) includes three bases (10101), and the three bases (10101) are respectively arranged on one side of the gantry (10201). Slidable fixture frames (10102) are installed on the upper end faces of the bases (10101). A blanking stop bar (10103) is connected to one side of the fixture frame (10102). Second V-shaped clamping blocks (10106) are installed on one side of the upper ends of the fixture frames (10102).

2. The precision welded pipe three-head cutting device according to claim 1, characterized in that, Mounting frames (10312) are installed on one side of each of the moving frames (10301). Slide rails (10307) are installed on both sides inside the mounting frames (10312), and speed reducers (10302) are slidably installed between the slide rails (10307).

3. The precision welded pipe three-head cutting device according to claim 2, characterized in that, Hydraulic cylinders (10310) are fixedly installed on the upper ends of the mounting frames (10312), and the moving ends of the hydraulic cylinders (10310) are fixedly connected to the inner sides of the speed reducers (10302).

4. The precision welded pipe three-head cutting device according to claim 3, characterized in that, Cutting discs (10305) can be installed at the output ends of the speed reducers (10302). Safety protection covers (10304) are fixedly installed on the outer sides of the speed reducers (10302) where the cutting discs (10305) are located. Servo motors (10303) are installed on the upper ends of the speed reducers (10302), and the output ends of the servo motors (10303) are drivingly connected to the input ends of the speed reducers (10302).

5. The precision welded pipe three-head cutting device according to claim 1, characterized in that, A strip-shaped groove (10205) is opened at the bottom end of the rectangular beam (10204). Three locking bolts (10207) are slidably inserted into the strip-shaped groove (10205). The bottom ends of the three locking bolts (10207) respectively penetrate through the bottom sides of the three moving frames (10301) and extend to the outside, and locking nuts (10206) are connected to all of them.

6. The precision welded pipe three-head cutting device according to claim 1, characterized in that, A first air cylinder (10107) is fixedly installed on one side of the upper end of the fixture frame (10102), and the moving end of the first air cylinder (10107) is fixedly connected to the second V-shaped clamping block (10106).

7. The precision welded pipe three-head cutting device according to claim 6, characterized in that, A movable seat (10104) is fixedly installed on the bottom side of the fixture rack (10102). A second cylinder (10105) is hinged inside the movable seat (10104) through a pin shaft. The movable end of the second cylinder (10105) is connected to the outer side of one end of the blanking stop rod (10103).

8. The precision welded pipe three-head cutting device according to claim 1, characterized in that, It further includes a feeding mechanism (104), a storage rack (100) and a guiding rack (106). The feeding mechanism (104) includes three pairs of feeding racks (10401). Each pair of the feeding racks (10401) is respectively arranged on both sides of the three bases (10101). The storage rack (100) is arranged at the bottom side of a pair of the support frames (10202). A fixed connection is provided between the bottom side of the guiding rack (106) and a pair of the support frames (10202).

9. The precision welded pipe three-head cutting device according to claim 8, characterized in that, A V-shaped rack (105) is fixedly installed on the upper end surface of the storage rack (100). Buffer pads are arranged on both inner sides of the V-shaped rack (105). An inclined plate (107) is installed at the top end of the guiding rack (106). The bottom end of the inclined plate (107) faces the V-shaped rack (105). A feeding stop rod (10403) is welded to one side of the upper end of each pair of the feeding racks (10401).

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