Multifunctional clamping device and method for laser pipe cutting machine

Abstract

The invention relates to a multifunctional clamping device and method for a laser pipe cutting machine, and relates to the technical field of clamping equipment.The multifunctional clamping device comprises a supporting frame and a downward pressing mechanism which are arranged on the pipe cutting machine, the downward pressing mechanism is located above the supporting frame, and a first supporting assembly and a second supporting assembly which are used for supporting pipes are arranged on the supporting frame; the downward pressing mechanism comprises a first downward pressing assembly matched with the first supporting assembly and further comprises a second downward pressing assembly matched with the second supporting assembly, a first sliding table is vertically and slidably connected to one side of the supporting frame in the height direction, the first supporting assembly comprises a supporting block, and the upper end of the supporting block is movably connected with two carrier rollers used for supporting the pipe. If the specification of the pipe is small, the first operation sliding table slides to the position below the pipe, and the pipe is supported and clamped through cooperation with the first downward pressing assembly; and if the specification of the pipe is large, the second supporting assembly is matched with the second downward pressing assembly to clamp the pipe, the pipe clamping device can be suitable for pipes of different specifications, and the applicability is high.

Description

Technical Field

[0001] The present invention relates to the technical field of clamping devices, and in particular to a multi-functional clamping device and method for a laser pipe cutting machine. Background Art

[0002] Most pipe cutting machines in the prior art clamp and rotate pipes through chucks; the rotation of the chuck is driven by controlling a servo motor, and the axial movement of the cutting head is coordinated to complete processes such as spiral cutting and bevel processing of pipes.

[0003] In the above related technologies, each chuck requires two sets of transmission structures driven by servo motors. One set controls the core rotation of the chuck, and usually a servo motor with a large torque needs to be selected; the price of a servo motor ranges from several thousand yuan to tens of thousands of yuan, and a laser pipe cutting machine requires multiple chucks. Therefore, the cost of the chucks of the laser pipe cutting machine in the prior art is very high, which also pushes up the cost of the laser pipe cutting machine. Summary of the Invention

[0004] In order to solve the above problems, the present application provides a multi-functional clamping device and method for a laser pipe cutting machine.

[0005] In a first aspect, the present application provides a multi-functional clamping device for a laser pipe cutting machine, adopting the following technical solution: A multi-functional clamping device for a laser pipe cutting machine includes a support frame and a pressing mechanism arranged on the pipe cutting machine. The pressing mechanism is located above the support frame. A first support component and a second support component for supporting pipes are arranged on the support frame. The pressing mechanism includes a first pressing component cooperating with the first support component, and the pressing mechanism further includes a second pressing component cooperating with the second support component. A first sliding table is vertically slidably connected to one side of the support frame in the height direction. The first support component includes a support block, and two roller supports for supporting pipes are movably connected to the upper end of the support block.

[0006] By adopting the above technical solution, according to the different models of the conveyed pipes, different clamping devices are used to clamp the pipes. If the pipe specifications are small, the first sliding table is manipulated to slide below the pipe, and the first pressing component is used to support and clamp the pipe; if the pipe specifications are large, the second support component is used to cooperate with the second pressing component to clamp the pipe, which can be applicable to pipes of different specifications and has high applicability.

[0007] Optionally, a second sliding table is vertically slidably connected to the other side of the support frame in the height direction, and a first horizontal roller is horizontally rotatably connected to the upper end of the second sliding table.

[0008] By adopting the above technical solution, if the pipe specifications are large, the second sliding table is manipulated to slide towards the pipe, and the first horizontal roller is moved to the lower end of the pipe to support the pipe, with a simple structure and convenient driving.

[0009] Optionally, a fixture for clamping the pipe is provided on the side of the second sliding table away from the first sliding table. A sliding plate is slidably connected to the side of the second sliding table away from the first sliding table. The fixture is arranged on the sliding plate, and two clamping plates are horizontally slidably connected to the sliding plate for clamping the pipe.

[0010] By adopting the above technical solution, after the pipe is supported, the pipe can slide on the first horizontal roller. When it slides to the position to be cut, the sliding plate can be manipulated to move towards the pipe, and then the two clamping plates can be manipulated to move towards each other to clamp the pipe, and then the pipe can be cut. The structure is simple and the clamping is convenient.

[0011] Optionally, the first pressing assembly includes a first horizontal plate vertically slidably connected to the pipe cutting machine. The lower end of the first horizontal plate is movably connected with a pressing block, and the lower end of the pressing block is movably connected with two pressing rollers for pressing the pipe.

[0012] By adopting the above technical solution, when clamping a pipe with a smaller specification, the first horizontal plate is manipulated to move towards the pipe, and the pressing rollers are moved to the position where they abut against the pipe to complete the pressing of the pipe.

[0013] Optionally, the second pressing assembly includes a second horizontal plate vertically slidably connected to the pipe cutting machine. The lower end of the second horizontal plate is rotatably connected with a second horizontal roller, and the second horizontal roller is parallel to the first horizontal roller.

[0014] By adopting the above technical solution, if the pipe has a larger model, after the pipe is supported by the first horizontal roller, the second horizontal roller is manipulated to move towards the first horizontal roller, thereby clamping the pipe. The structure is simple and the driving is convenient.

[0015] Optionally, a support column is vertically arranged at the upper end of the pipe cutting machine. Both the first horizontal plate and the second horizontal plate are slidably connected to the support column.

[0016] By adopting the above technical solution, the support column can limit the first horizontal plate and the second horizontal plate, thereby improving the sliding stability of the first horizontal plate and the second horizontal plate.

[0017] Optionally, a first rack is arranged on the side of the first horizontal plate close to the second horizontal plate, a second rack is arranged on the side of the second horizontal plate close to the first horizontal plate, and a gear is rotatably connected to one side of the support column in the height direction. Both the first rack and the second rack are meshed with the gear.

[0018] By adopting the above technical solution, by manipulating the first rack to slide, the gear can be driven to rotate, and then the second rack can be driven to slide. The structure is simple and the driving is convenient. There is no need to use too many driving devices for driving, which can save costs.

[0019] Optionally, an active component I is provided at the upper end of the sliding table I. The active component I includes a double-headed cylinder I. Support plates I are provided on the two piston rods of the double-headed cylinder I. A relief groove is provided at the upper end of the support plate I. A support shell I is rotatably connected to each support plate I. The support shells I correspond to the idler rollers one by one. Each idler roller is rotatably connected within the support shell I. One ends of the two support shells I close to each other are hinged.

[0020] By adopting the above technical solution, when adjusting the angle between the two idler rollers, by operating the piston rods of the double-headed cylinder to extend simultaneously, the two idler rollers are driven to move away from each other. By operating the piston rods of the double-headed cylinder to retract simultaneously, the two idler rollers are driven to move closer to each other. The structure is simple and the adjustment is convenient.

[0021] Optionally, an active component II is provided on one side in the length direction of the horizontal plate I. The active component II is arranged opposite to the active component I. The active component II includes a double-headed cylinder II. Support plates II are provided on the two piston rods of the double-headed cylinder II. The support plates II are all arranged towards the support plate I. A relief groove is provided at the lower end of the support plate II. A support shell II is rotatably connected to each support plate II. The support shells II correspond to the pressure rollers one by one. Each pressure roller is rotatably connected within the support shell II. One ends of the two support shells II close to each other are hinged.

[0022] By adopting the above technical solution, when adjusting the angle between the two pressure rollers, by operating the piston rods of the double-headed cylinder to extend simultaneously, the two pressure rollers are driven to move away from each other. By operating the piston rods of the double-headed cylinder to retract simultaneously, the two pressure rollers are driven to move closer to each other. The structure is simple and the adjustment is convenient.

[0023] In a second aspect, the present application provides a clamping method for a laser pipe cutting machine.

[0024] A clamping method for a laser pipe cutting machine includes the following steps: S1: Judge the shape of the pipe to be cut; S1.1: If the pipe is square, operate the sliding table I to slide below the pipe to support the pipe; if the specification of the pipe is large, operate the sliding table II to rise below the pipe, and the horizontal roller I is used to support the pipe; if the pipe is circular, adjust the angle between the two horizontal rollers I to support the pipe; S2: If the pipe is square, adjust the angle between the two pressure rollers to 90°, and clamp the pipe in cooperation with the two support rollers; if the pipe is round, extend the piston rods of the double-headed cylinder one and the double-headed cylinder two to expand the angle between the two pressure rollers and the angle between the support rollers, and move the pressure rollers towards the pipe to clamp the pipe in cooperation with the support rollers; if the pipe is of a large specification, operate the horizontal roller two to clamp the pipe in cooperation with the horizontal roller one; then use the fixture to clamp the pipe to complete the clamping of the pipe.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. According to the different models of the conveyed pipes, different clamping devices are used to clamp the pipes. If the pipe specification is small, slide the sliding table one to the lower part of the pipe and cooperate with the lower pressing component one to support and clamp the pipe; if the pipe specification is large, use the support component two to cooperate with the lower pressing component two to clamp the pipe, which can be applicable to pipes of different specifications and has high applicability. 2. When adjusting the angle between the two idler rollers, extend the piston rods of the double-headed cylinder simultaneously, and then drive the two idler rollers to move away from each other. Retract the piston rods of the double-headed cylinder simultaneously to drive the two idler rollers to move closer to each other. The structure is simple and the adjustment is convenient. 3. When adjusting the angle between the two pressure rollers, extend the piston rods of the double-headed cylinder simultaneously, and then drive the two pressure rollers to move away from each other. Retract the piston rods of the double-headed cylinder simultaneously to drive the two pressure rollers to move closer to each other. The structure is simple and the adjustment is convenient. Description of the Drawings

[0026] Figure 1 It is a schematic diagram highlighting the support frame in a multi-functional clamping device of a laser pipe cutting machine.

[0027] Figure 2 It is a schematic diagram of the overall structure of a multi-functional clamping device of a laser pipe cutting machine.

[0028] Figure 3 It is a schematic diagram highlighting the idler rollers in a multi-functional clamping device of a laser pipe cutting machine.

[0029] Figure 4 It is a schematic diagram highlighting the pressure rollers in a multi-functional clamping device of a laser pipe cutting machine.

[0030] Figure 5 It is a schematic diagram highlighting the support columns in a multi-functional clamping device of a laser pipe cutting machine.

[0031] Figure 6 It is a schematic diagram highlighting the fixture in a multi-functional clamping device of a laser pipe cutting machine.

[0032] Description of reference numerals: 100, pipe; 1, support frame; 11, first sliding table; 111, first double-headed cylinder; 112, first support plate; 113, first support shell; 12, support block; 13, idler roller; 14, first cylinder; 15, second sliding table; 151, first horizontal roller; 16, third cylinder; 2, downward pressing mechanism; 3, support column; 31, first horizontal plate; 311, downward pressing block; 312, pressing roller; 313, second double-headed cylinder; 314, second support plate; 315, second support shell; 316, first rack; 32, second horizontal plate; 321, second rack; 4, gear; 5, sliding plate; 51, clamping plate; 52, third double-headed cylinder; 6, second horizontal roller; 7, second cylinder. Detailed implementation manners

[0033] The following further describes the present application in detail with reference to all the drawings.

[0034] In a first aspect, an embodiment of the present application discloses a multi-functional clamping device for a laser pipe cutting machine.

[0035] Referring to Figure 1 and Figure 2 , a multi-functional clamping device for a laser pipe cutting machine includes a support frame 1 and a downward pressing mechanism 2 arranged on the pipe cutting machine. The downward pressing mechanism 2 is located above the support frame 1. A first support assembly and a second support assembly for supporting the pipe 100 are arranged on the support frame 1. The downward pressing mechanism 2 includes a first downward pressing assembly cooperating with the first support assembly, and the downward pressing mechanism 2 further includes a second downward pressing assembly cooperating with the second support assembly. A first sliding table 11 is vertically and slidably connected to one side of the support frame 1 in the height direction. The first support assembly includes a support block 12, and two idler rollers 13 for supporting the pipe 100 are movably connected to the upper end of the support block 12. According to the different models of the conveyed pipe 100, different clamping devices are used to clamp the pipe 100.

[0036] Among them, if the specification of the pipe 100 to be clamped is small, the first support assembly can be used in cooperation with the first downward pressing assembly to clamp the pipe 100; before clamping the pipe 100, it is first necessary to judge whether the pipe 100 is a square pipe or a round pipe; Referring to Figure 1 and Figure 3, if the pipe 100 is square; adjust the angle between the two idlers 13 to 90° in advance; an active component one is provided at the upper end of the sliding table one 11, and the active component one includes a double-headed cylinder one 111. Support plates one 112 are provided on the two piston rods of the double-headed cylinder one 111. A relief groove is provided at the upper end of the support plate one 112. A support shell one 113 is rotatably connected to each support plate one 112. The support shell one 113 corresponds to the idler 13 one by one. Each idler 13 is rotatably connected within the support shell one 113. One ends of the two support shells one 113 close to each other are hinged; by operating the piston rod of the double-headed cylinder one 111 to move, the support shell one 113 is driven to move, and the two support shells one 113 rotate along the hinge, thereby driving the two idlers 13 to rotate. The structure is simple and the adjustment is convenient.

[0037] Refer to Figure 1 and Figure 3 , after adjusting the angle between the two idlers 13 to 90°, the two idlers 13 can be manipulated to move towards the pipe 100 to lift the pipe 100; a cylinder one 14 is vertically provided at the upper end of the support frame 1, and the piston rod of the cylinder one 14 is fixedly connected to the support block 12. By operating the piston rod of the cylinder one 14 to extend, the two idlers 13 can be driven to move. The structure is simple, the driving is convenient and the cost is low.

[0038] Refer to Figure 2 and Figure 4 , the pressing component one includes a horizontal plate one 31 vertically slidably connected to the pipe cutting machine. A pressing block 311 is movably connected to the lower end of the horizontal plate one 31. Two pressure rollers 312 for pressing the pipe 100 are movably connected to the lower end of the pressing block 311; an active component two is provided on one side in the length direction of the horizontal plate one 31. The active component two is arranged opposite to the active component one. The active component two includes a double-headed cylinder two 313. Support plates two 314 are provided on the two piston rods of the double-headed cylinder two 313. The support plates two 314 are all arranged towards the support plate one 112. A relief groove is provided at the lower end of the support plate two 314. A support shell two 315 is rotatably connected to each support plate two 314. The support shell two 315 corresponds to the pressure roller 312 one by one. Each pressure roller 312 is rotatably connected within the support shell two 315. One ends of the two support shells two 315 close to each other are hinged; when adjusting the angle between the two pressure rollers 312, by operating the piston rod of the double-headed cylinder to move, the two support shells are driven to rotate along the hinge, thereby driving the two pressure rollers 312 to rotate. The structure is simple and the adjustment is convenient.

[0039] Refer to Figure 2 and Figure 4 , after adjusting the angle between the two pressure rollers 312 to 90°, the two pressure rollers 312 can be manipulated to move towards the pipe 100 to press the pipe 100; Reference Figure 2 and Figure 5 At the upper end of the pipe cutting machine, a support column 3 is vertically arranged, and a first horizontal plate 31 is slidably connected to the support column 3; on one side of the support column 3 in the height direction, a second cylinder 7 is arranged, and the piston rod of the second cylinder 7 is fixedly connected to the first horizontal plate 31; by operating the retraction of the second cylinder 7, the first horizontal plate 31 is driven to slide, and then the two pressure rollers 312 are moved to the position of the pipe 100 to press the pipe 100. The structure is simple, the driving is convenient, and the cost is relatively low.

[0040] Reference Figure 1 and Figure 2 If the pipe 100 is a round pipe; by operating the angle between the two supporting rollers 13 to be greater than 90°; and operating the angle between the two pressure rollers 312 to also be greater than 90°, the contact area with the pipe 100 is increased, and the stability of pressing the pipe 100 is improved.

[0041] Reference Figure 1 and Figure 2 If the pipe 100 is a pipe 100 with a larger specification, such as a rectangular pipe, the second supporting component can be used in cooperation with the second pressing component to clamp the pipe 100; Reference Figure 2 and Figure 5 On the other side of the support frame 1 in the height direction, a second sliding table 15 is vertically slidably connected, a third cylinder 16 is arranged on the support frame 1, the piston rod of the third cylinder 16 is fixedly connected to the second sliding table 15, and a first horizontal roller 151 is horizontally rotatably connected to the upper end of the second sliding table 15; by operating the piston rod of the third cylinder 16 to extend, the first horizontal roller 151 is moved below the pipe 100 to support the pipe 100.

[0042] Reference Figure 2 and Figure 5 The second pressing component includes a second horizontal plate 32 vertically slidably connected to the pipe cutting machine, and the second horizontal plate 32 is also slidably connected to the support column 3; on one side of the first horizontal plate 31 close to the second horizontal plate 32, a first rack 316 is arranged, on one side of the second horizontal plate 32 close to the first horizontal plate 31, a second rack 321 is arranged, and a gear 4 is rotatably connected to one side of the support column 3 in the height direction, and both the first rack 316 and the second rack 321 are engaged with the gear 4; Reference Figure 2 and Figure 5 By operating the piston rod of the second cylinder 7 to extend, the first horizontal plate 31 is driven to move upward, the first rack 316 moves with the first horizontal plate 31, driving the gear 4 to rotate, and then driving the second rack 321 and the second horizontal plate 32 to slide in the direction close to the pipe 100, and then driving the second horizontal roller 6 to move in the direction close to the pipe 100 to clamp the pipe 100. The structure is simple, the driving is convenient, and there is no need to use too many driving devices for driving, which can save costs.

[0043] After clamping the pipe 100 with the first horizontal roller 151 and the second horizontal roller 6, the pipe 100 can be manipulated to move. During the movement, both the first horizontal roller 151 and the second horizontal roller 6 rotate. Refer to Figure 1 and Figure 6 As shown in [relevant figure numbers], a fixture for clamping the pipe 100 is provided on the side of the second sliding table 15 away from the first sliding table 11. A sliding plate 5 is slidably connected to the side of the second sliding table 15 away from the first sliding table 11. The fixture is arranged on the sliding plate 5. Two clamping plates 51 are horizontally slidably connected to the sliding plate 5 for clamping the pipe 100. After moving the pipe 100 to the position to be cut, the fixture can be manipulated to clamp and fix the pipe 100. A double-headed cylinder three 52 is provided on the side of the second sliding plate 15 away from the first sliding table 11. The two clamping plates 51 are respectively fixedly connected to the two piston rods of the double-headed cylinder three 52. By manipulating the two piston rods of the double-headed cylinder three 52 to retract, the two clamping plates 51 are driven to move towards each other to clamp the pipe 100. Then the pipe 100 can be cut.

[0044] In a second aspect, an embodiment of the present application discloses a clamping method for a laser pipe cutting machine, including the following steps: S1: Determine the shape of the pipe 100 to be cut; S1.1: If the pipe 100 is square, manipulate the first sliding table 11 to slide below the pipe 100 to support the pipe 100. If the specification of the pipe 100 is large, manipulate the second sliding table 15 to rise below the pipe 100, and the first horizontal roller 151 is used to support the pipe 100. If the pipe 100 is circular, adjust the angle between the two first horizontal rollers 151 to support the pipe 100. S2: If the pipe 100 is square, adjust the angle between the two pressure rollers 312 to 90°, and cooperate with the two support rollers to clamp the pipe 100. If the pipe 100 is circular, by manipulating the piston rods of the first double-headed cylinder 111 and the second double-headed cylinder 313 to extend, expand the angle between the two pressure rollers 312 and the angle between the support rollers. By manipulating the pressure rollers 312 to move towards the pipe 100, cooperate with the support rollers to clamp the pipe 100. If the specification of the pipe 100 is large, manipulate the second horizontal roller 6 to cooperate with the first horizontal roller 151 to clamp the pipe 100. Then use the fixture to clamp the pipe 100 to complete the clamping of the pipe 100.

[0045] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A multi-functional clamping device for a laser pipe cutting machine, comprising a support frame (1) and a downward pressing mechanism (2) arranged on the pipe cutting machine, characterized in that: The pressing mechanism (2) is located above the support frame (1). On the support frame (1), there are a first support assembly and a second support assembly for supporting the pipe (100). The pressing mechanism (2) includes a first pressing assembly that cooperates with the first support assembly. The pressing mechanism (2) further includes a second pressing assembly that cooperates with the second support assembly. On one side in the height direction of the support frame (1), there is a first sliding table (11) connected in a vertical sliding manner. The first support assembly includes a support block (12). At the upper end of the support block (12), there are two idler rollers (13) movably connected for supporting the pipe (100).

2. The multifunctional clamping device of a laser tube cutting machine according to claim 1, characterized in that: On the other side in the height direction of the support frame (1), there is a second sliding table (15) connected in a vertical sliding manner. At the upper end of the second sliding table (15), there is a first horizontal roller (151) connected in a horizontal rotational manner.

3. The multifunctional clamping device of a laser pipe cutting machine according to claim 1, characterized in that: On the side of the second sliding table (15) away from the first sliding table (11), there is a fixture for clamping the pipe (100). On the side of the second sliding table (15) away from the first sliding table (11), there is a sliding plate (5) connected in a sliding manner. The fixture is arranged on the sliding plate (5). On the sliding plate (5), there are two clamping plates (51) connected in a horizontal sliding manner for clamping the pipe (100).

4. The multifunctional clamping device of a laser pipe cutting machine according to claim 2, wherein: The first pressing assembly includes a first horizontal plate (31) vertically slidably connected to the pipe cutting machine. At the lower end of the first horizontal plate (31), there is a pressing block (311) movably connected. At the lower end of the pressing block (311), there are two pressure rollers (312) movably connected for pressing the pipe (100).

5. The multifunctional clamping device of a laser pipe cutting machine according to claim 4, characterized in that: The second pressing assembly includes a second horizontal plate (32) vertically slidably connected to the pipe cutting machine. At the lower end of the second horizontal plate (32), there is a second horizontal roller rotatably connected. The second horizontal roller is parallel to the first horizontal roller (151).

6. The multifunctional clamping device of a laser pipe cutting machine according to claim 5, characterized in that: On the upper end of the pipe cutting machine, there is a support column (3) vertically arranged. Both the first horizontal plate (31) and the second horizontal plate (32) are slidably connected to the support column (3).

7. The multifunctional clamping device of a laser pipe cutting machine according to claim 6, characterized in that: On the side of the first horizontal plate (31) close to the second horizontal plate (32), there is a first rack (316). On the side of the second horizontal plate (32) close to the first horizontal plate (31), there is a second rack (321). On one side in the height direction of the support column (3), there is a gear (4) rotatably connected. Both the first rack (316) and the second rack (321) are engaged with the gear (4).

8. The multifunctional clamping device of a laser pipe cutting machine according to claim 3, characterized in that: At the upper end of the first sliding table (11), there is a first moving assembly. The first moving assembly includes a first double-headed cylinder (111). On both piston rods of the first double-headed cylinder (111), there are first support plates (112). At the upper end of the first support plates (112), there are relief grooves. On each first support plate (112), there is a first support shell (113) rotatably connected. The first support shells (113) correspond to the idler rollers (13) one by one. Each idler roller (13) is rotatably connected inside the first support shell (113). One ends of the two first support shells (113) close to each other are hinged.

9. The multifunctional clamping device of a laser pipe cutting machine according to claim 4, wherein: A movable component 2 is arranged on one side of the length direction of the horizontal plate 1 (31), and the movable component 2 is arranged opposite to the movable component 1. The movable component 2 includes a double-headed cylinder 2 (313), and support plates 2 (314) are arranged on the two piston rods of the double-headed cylinder 2 (313). The support plates 2 (314) are arranged in the direction of the support plate 1 (112), and a clearance groove is opened at the lower end of the support plates 2 (314). Each support plate 2 (314) is rotatably connected to a support shell 2 (315), and the support shell 2 (315) corresponds to the pressure roller (312) one by one. Each pressure roller (312) is rotatably connected in the support shell 2 (315), and the two support shells 2 (315) are hinged at one end close to each other.

10. A laser tube cutting machine clamping method, using the multifunctional clamping device for laser tube cutting machine according to claim 9 to clamp a tube (100), comprising the following steps: S1: determining the shape of the pipe (100) to be cut; S1.1: If the pipe (100) is square, the sliding platform (11) is operated to slide to the bottom of the pipe (100) to support the pipe (100); if the pipe (100) is larger in size, the sliding platform (15) is operated to rise to the bottom of the pipe (100), and the horizontal roller (151) is used to support the pipe (100); if the pipe (100) is round, the angle between the two horizontal rollers (151) is adjusted to support the pipe (100); S2: If the pipe (100) is square, the angle between the two pressing rollers (312) is adjusted to 90°, and the pipe (100) is clamped in cooperation with the two supporting rollers; if the pipe (100) is round, the piston rods of the double-headed cylinder 1 (111) and the double-headed cylinder 2 (313) are extended to expand the angle between the two pressing rollers (312) and the angle between the supporting rollers, and the pressing rollers (312) are moved toward the pipe (100) to clamp the pipe (100) in cooperation with the supporting rollers; if the pipe (100) is of larger specifications, the horizontal roller 2 is operated to cooperate with the horizontal roller 1 (151) to clamp the pipe (100); and then the pipe (100) is clamped by a clamp to complete the clamping of the pipe (100).

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