Process and device for eliminating segregation of cast-rolled alloy plate

Abstract

The invention discloses a cast-rolled alloy plate segregation elimination process and device, which comprises the following steps: feeding a molten material into a molten material box, carrying out ultrasonic dispersion treatment on the molten material in the molten material box through an ultrasonic dispersion device, then primarily cooling the molten material in the molten material box through a casting roller assembly, and carrying out cast rolling to form a continuous blank; the continuous blank is subjected to secondary cooling for further shaping, then the continuous blank subjected to secondary cooling is continuously rolled into the specified thickness through a continuous rolling mechanism, finally, the rolled continuous blank is cut into alloy plates through a cutting mechanism, the alloy plates are collected in a collecting box, and the alloy plates are subjected to ultrasonic dispersion, so that the finished product is obtained. According to the method, all elements in a molten material can be uniformly dispersed and moved in the molten material, all the elements are uniformly distributed in a blank after the molten material is cooled into the blank, and then the blank is rolled and cut to form the alloy plate, by means of the method, all the elements are uniformly distributed in the alloy plate, and the segregation influence of the alloy plate can be reduced or even eliminated.

Description

Technical Field

[0001] The invention relates to the technical field of alloy casting and rolling, and in particular to a process and a device for eliminating segregation of a cast-rolled alloy plate. Background Art

[0002] Aluminum alloys contain high levels of alloying elements such as iron, silicon, and copper, so they have a smaller crystallization range. During the production process, a faster rolling speed can be achieved, thereby increasing output. However, due to the high level of alloying elements, the aluminum liquid is prone to uneven element composition during the crystallization process, which is called composition segregation. Therefore, the cooling intensity needs to be adjusted to reduce or eliminate segregation. Summary of the invention

[0003] In order to solve the above-mentioned deficiencies in the prior art, the present invention proposes a process and device for eliminating segregation of cast-rolled alloy plates.

[0004] In order to achieve the above technical effects, the present invention adopts the following scheme:

[0005] A process for eliminating segregation of a cast-rolled alloy plate comprises the following steps:

[0006] S1, feeding the molten material into the molten material box;

[0007] S2, subjecting the molten material in the melt box to ultrasonic dispersion treatment;

[0008] S3, preliminarily cooling the molten material in the melt box through the casting roller assembly and casting and rolling it into a continuous billet;

[0009] S4, further shaping the continuous blanks through secondary cooling;

[0010] S5, continuously rolling the continuous billet after secondary cooling;

[0011] S6. The rolled continuous billet is sheared into alloy plates.

[0012] A device for eliminating segregation of cast-rolled alloy plates comprises a melt box, a casting roll assembly, a secondary cooling mechanism, a continuous rolling mechanism, a cutting mechanism and a collecting box which are arranged in sequence; a feed nozzle is provided at the lower end of the melt box, the casting roll assembly is arranged below the melt box, the feed nozzle corresponds to the casting and rolling area in the casting roll assembly, one end of the secondary cooling mechanism is located below the casting roll assembly, and the other end is close to the continuous rolling mechanism, the cutting mechanism is located at one end of the continuous rolling mechanism away from the secondary cooling mechanism, the collecting box is located at one end of the cutting mechanism away from the continuous rolling mechanism, and an ultrasonic dispersion device is installed on the melt box.

[0013] A preferred technical solution is that the molten material box comprises an outer box and an inner box, the inner box is arranged inside the outer box, a strip-shaped feeding nozzle is arranged at the lower end of the outer box, a discharge port is arranged at the opening of the inner box, and the discharge port is connected to the top of the feeding nozzle through a metal bellows, and the inner walls of the inner box and the outer box are filled with foam pads, sponge pads and asbestos mesh pads arranged from the inside to the outside, the ultrasonic dispersion device comprises a transducer and an ultrasonic controller connected to the transducer, an installation groove is arranged on the inner side of the foam pad, the transducer is installed in the installation groove, the ultrasonic controller is arranged outside the outer box, and the ultrasonic controller is electrically connected to the transducer through a conductive wire passing through the side wall of the outer box, the asbestos mesh layer, the sponge pad and the foam pad.

[0014] According to a preferred technical solution, the casting roller assembly is provided with at least one group, and the multiple groups of casting roller assemblies are arranged in sequence from top to bottom. The casting roller assembly includes a first casting roller and a second casting roller which are arranged horizontally and in parallel. The first casting roller and the second casting roller are both rotatably installed on a column. The first casting roller and the second casting roller are synchronously driven to rotate by a first motor. The first casting roller and the second casting roller are spaced apart from each other, and a cooling system is provided inside the first casting roller and the second casting roller.

[0015] According to a preferred technical solution, the surface convexity of the first casting roll and the second casting roll is 0.08 mm and the roughness is 0.09-0.12 mm.

[0016] According to a preferred technical solution, the area between the lower end of the feed nozzle and the center line of the first casting roller and the second casting roller is the casting zone, and the casting zone is 50 mm.

[0017] A preferred technical solution, the cooling system includes a plurality of semiconductor refrigeration plates, the first casting roller and the second casting roller are both provided with inner cavities, a plurality of semiconductor refrigeration plates are arranged in the inner cavities, the cooling ends of the plurality of semiconductor refrigeration plates are attached to the inner wall of the inner cavity, and a plurality of semiconductor refrigeration sheets are arranged to cover the entire inner wall of the inner cavity, both ends of the inner cavity have heat dissipation holes penetrating the first casting roller and the second casting roller, a heat dissipation fan is installed at one end of the inner cavity near the corresponding heat dissipation holes, and the air outlet end of the heat dissipation fan is arranged toward the heat dissipation holes.

[0018] A preferred technical solution is that the secondary cooling mechanism includes a linear water trough, the opening of which faces upward, one end of the water trough is arranged close to the casting roller assembly, and the other end of the water trough is arranged close to the continuous rolling mechanism, and the bottom of the water trough is connected with a water inlet pipe and a water outlet pipe, the water inlet pipe is arranged close to the casting roller assembly, and the water outlet pipe is arranged close to the continuous rolling mechanism.

[0019] A preferred technical solution is that the continuous rolling mechanism includes a plurality of pressing assemblies arranged in sequence along the direction from the secondary cooling mechanism to the cutting mechanism, and the rolling assembly includes a support column on which a support roller and a rolling roller are rotatably mounted, and the rolling roller is located above the support roller and is driven to rotate by a second motor.

[0020] A preferred technical solution, the cutting mechanism includes a support frame, a cutting table, a pressing mechanism and a cutting knife, the cutting table is horizontally mounted on the support frame, the cutting knife is mounted on the support frame through the pressing mechanism and moves vertically and is located above the cutting table, a cutting groove corresponding to the cutting knife is provided on the cutting table, the pressing mechanism includes a hydraulic cylinder vertically mounted on the support frame, the output shaft of the hydraulic cylinder is downwardly arranged and connected to the cutting knife through a mounting frame, a vertical guide rod is fixedly mounted on the mounting frame, and a guide sleeve for the guide rod to pass through is provided on the support frame.

[0021] Compared with the prior art, the beneficial effects are:

[0022] In the present invention, ultrasonic dispersion is used to enable various elements in the molten material to move in the molten material, thereby being evenly dispersed in various places in the molten material. After the molten material is cooled to form a billet, the various elements are evenly distributed in the billet, and then the billet is rolled and cut to form an alloy plate. Through the method of the present invention, the various elements are evenly distributed in the alloy plate, which can reduce or even eliminate the segregation effect of the alloy plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a flowchart of the process in the present invention;

[0024] Figure 2 is a cross-sectional schematic diagram of the present invention;

[0025] Figure 3 yes Figure 2 A schematic diagram of the enlarged structure of part A;

[0026] Figure 4 It is a schematic cross-sectional view of the first casting roll in the present invention.

[0027] Figure numerals: 1. melt box; 2. casting roller assembly; 3. secondary cooling mechanism; 4. continuous rolling mechanism; 5. cutting mechanism; 6. collecting box; 7. feeding nozzle; 8. outer box; 9. inner box; 10. foam cushion layer; 11. sponge cushion layer; 12. asbestos mesh layer; 13. transducer; 14. discharge port; 15. metal bellows; 16. first casting roller; 17. second casting roller; 18. water tank; 19. water inlet pipe; 20. water outlet pipe; 21. support column; 22. rolling roller; 23. support roller; 24. cutting table; 25. hydraulic cylinder; 26. cutting knife; 27. cutting groove; 28. inner cavity; 29. ​​semiconductor refrigeration plate; 30. heat dissipation hole; 31. cooling fan. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] A process and device for eliminating segregation of cast-rolled alloy plates, wherein the device comprises a melt box 1, a casting roll assembly 2, a secondary cooling mechanism 3, a continuous rolling mechanism 4, a cutting mechanism 5 and a collecting box 6 which are arranged in sequence; a feed nozzle 7 is provided at the lower end of the melt box 1, the casting roll assembly 2 is arranged below the melt box 1, the feed nozzle 7 corresponds to the casting and rolling area in the casting roll assembly 2, one end of the secondary cooling mechanism 3 is located below the casting roll assembly 2, and the other end is close to the continuous rolling mechanism 4, the cutting mechanism 5 is located at the end of the continuous rolling mechanism 4 away from the secondary cooling mechanism 3, the collecting box 6 is located at the end of the cutting mechanism 5 away from the continuous rolling mechanism 4, and an ultrasonic dispersion device is installed on the melt box 1.

[0030] The melt box 1 is used to hold the molten material, the casting roller assembly 2 is used to cool and solidify the molten material sent out from the melt box 1, and to perform roll forming at the same time, the secondary cooling mechanism 3 is used to further cool and shape the billet after casting and rolling by the casting roller assembly 2, the continuous rolling mechanism 4 is used to roll the billet into a suitable thickness, the cutting mechanism 5 is used to cut the billet into plates, and then collect them into the collection box 6, and the ultrasonic dispersion device is used to ultrasonically disperse the molten material in the melt box 1, so that the elements in the molten material are evenly dispersed everywhere in the molten material through movement.

[0031] The molten material in the melt box 1 is continuously discharged, and the casting roll assembly 2 is continuously cast and rolled, thereby forming a continuous billet.

[0032] Furthermore, the melt box 1 includes an outer box 8 and an inner box 9, the inner box 9 is arranged in the outer box 8, a strip-shaped feed nozzle 7 is arranged at the lower end of the outer box 8, a discharge port 14 is opened at the opening of the inner box 9, and the discharge port 14 is connected to the top of the feed nozzle 7 through a metal bellows 15, and the inner walls of the inner box 9 and the outer box 8 are filled with a foam pad layer 10, a sponge pad layer 11 and an asbestos mesh pad layer arranged from the inside to the outside, the ultrasonic dispersion device includes a transducer 13 and an ultrasonic controller connected to the transducer 13, an installation groove is opened on the inner side of the foam pad layer 10, the transducer 13 is installed in the installation groove, the ultrasonic controller is arranged outside the outer box 8, and the ultrasonic controller is electrically connected to the transducer 13 through a conductive wire passing through the side wall of the outer box 8, the asbestos mesh layer 12, the sponge pad layer 11 and the foam pad layer 10.

[0033] The molten material is placed in the inner box 9, and the transducer 13 is controlled to vibrate by an ultrasonic controller, thereby causing the inner box 9 to vibrate and causing the elements in the molten material to move and disperse. The foam cushion layer 10 and the sponge cushion layer 11 separate the inner box 9 from the outer box 8 to prevent the vibration of the inner box 9 from being transmitted to the outer box 8. In addition, due to the high temperature of the molten material, the asbestos mesh layer 12 reduces the heat transferred from the inner box 9 to the outer box 8 to avoid burns.

[0034] Furthermore, the casting roll assembly 2 is provided with at least one group, and the multiple groups of casting roll assemblies 2 are arranged in sequence from top to bottom, so that the molten material discharged from the melt box 1 is formed after multiple casting and rolling. The casting roll assembly 2 includes a first casting roll 16 and a second casting roll 17 arranged horizontally and parallel, and the first casting roll 16 and the second casting roll 17 are both rotatably installed on the column, and the first casting roll 16 and the second casting roll 17 are synchronously driven to rotate by the first motor. One end of each of the first casting roll 16 and the second casting roll 17 is coaxially installed with A rotating pulley is provided at the output end of the first motor, and the first motor pulley is connected to the two rotating pulleys through two belts respectively. The first casting roller 16 and the second casting roller 17 are arranged at intervals, and the distance between the first casting roller 16 and the second casting roller 17 is the thickness of the cast billet. A cooling system is provided in the first casting roller 16 and the second casting roller 17, and the cooling system is used to make the surfaces of the first casting roller 16 and the second casting roller 17 have a low temperature, and cool and shape them while rolling.

[0035] Furthermore, the surface convexity of the first casting roll 16 and the second casting roll 17 is 0.08 mm and the roughness is 0.09-0.12 mm.

[0036] Furthermore, the area between the lower end of the feed nozzle 7 and the center line of the first casting roller 16 and the second casting roller 17 is a casting zone, and the casting zone is 50 mm.

[0037] Furthermore, the cooling system includes a plurality of semiconductor refrigeration plates 29, an inner cavity 28 is opened in the first casting roller 16 and the second casting roller 17, and the plurality of semiconductor refrigeration plates 29 are arranged in the inner cavity 28, the cooling ends of the plurality of semiconductor refrigeration plates 29 are attached to the inner wall of the inner cavity 28, and a plurality of semiconductor refrigeration sheets are arranged to cover the entire inner wall of the inner cavity 28, and both ends of the inner cavity 28 have heat dissipation holes 30 that penetrate the first casting roller 16 and the second casting roller 17, and a cooling fan 31 is installed at one end of the inner cavity 28 near the corresponding heat dissipation hole 30, and the air outlet end of the cooling fan 31 is arranged toward the heat dissipation hole 30.

[0038] The cold end of the semiconductor refrigeration plate 29 is connected to the inner wall of the inner cavity 28, which is used to transfer the low temperature to the surface of the first casting roller 16 and the second casting roller 17. The heat dissipated from the hot end of the semiconductor refrigeration plate 29 is driven by the cooling fan 31 and blown out of the inner cavity 28 through the heat dissipation hole 30.

[0039] Furthermore, the secondary cooling mechanism 3 includes a linear water trough 18, which is horizontally arranged with an opening of the water trough 18 facing upward. One end of the water trough 18 is arranged close to the casting roller assembly 2, and the other end of the water trough 18 is arranged close to the continuous rolling mechanism 4. The bottom of the water trough 18 is connected with a water inlet pipe 19 and a water outlet pipe 20. Cold water enters the water trough 18 from the water inlet pipe 19 and is discharged from the water outlet pipe 20. During the secondary cooling process, the water in the water trough 18 maintains a flow state of the water inlet pipe 19 in and out of the water outlet pipe 20. The water inlet pipe 19 is arranged close to the casting roller assembly 2, and the water outlet pipe 20 is arranged close to the continuous rolling mechanism 4.

[0040] The blank formed by casting and rolling is drawn into the water tank 18 , and is further cooled and shaped by the cooling fluid flowing in the water tank 18 , and then drawn out from the other end of the water tank 18 and sent to the continuous rolling mechanism 4 .

[0041] Furthermore, the continuous rolling mechanism 4 includes a plurality of pressing assemblies arranged in sequence along the direction from the secondary cooling mechanism 3 to the cutting mechanism 5, and the rolling assembly includes a support column 21, on which a support roller 23 and a rolling roller 22 are rotatably mounted, and the rolling roller 22 is located above the support roller 23 and is driven to rotate by a second motor.

[0042] The distance between the support roller 23 and the rolling roller 22 on each rolling assembly is different. Along the conveying direction of the billet, the distance between the support roller 23 and the rolling roller 22 gradually decreases until it reaches the same thickness as the specified alloy plate. The continuous billet is passed between the support roller 23 and the rolling roller 22, and the thickness of the billet is rolled to the specified thickness through continuous rolling.

[0043] Furthermore, the cutting mechanism 5 includes a support frame, a cutting table 24, a pressing mechanism and a cutting knife 26. The cutting table 24 is horizontally installed on the support frame. The cutting knife 26 is installed on the support frame through the pressing mechanism and moves vertically and is located above the cutting table 24. The cutting table 24 is provided with a cutting groove 27 corresponding to the cutting knife 26. The pressing mechanism includes a hydraulic cylinder 25 vertically arranged on the support frame. The output shaft of the hydraulic cylinder 25 is arranged downward and connected to the cutting knife 26 through a mounting frame. A vertical guide rod is fixed on the mounting frame, and a guide sleeve for the guide rod to pass through is provided on the support frame.

[0044] After the blank is delivered to the cutting table 24, the hydraulic cylinder 25 drives the cutting knife 26 to descend so as to cut the blank, and the cut alloy sheet is delivered to the collecting box 6 for collection.

[0045] The process steps of the above-mentioned device include: first feeding the molten material into the melt box 1, ultrasonically dispersing the molten material in the melt box 1 through an ultrasonic dispersion device, then preliminarily cooling the molten material in the melt box 1 through the casting roller assembly 2 and casting and rolling it into a continuous billet, then further shaping the continuous billet through secondary cooling, and then continuously rolling the continuous billet after secondary cooling into a specified thickness through a continuous rolling mechanism 4, and finally cutting the rolled continuous billet into alloy plates through a cutting mechanism 5 and collecting them in a collection box 6.

[0046] Through ultrasonic dispersion, various elements in the molten material can move in the molten material, and thus are evenly dispersed in various places in the molten material. After the molten material is cooled to form a billet, various elements are evenly distributed in the billet, and then after rolling and cutting, it becomes an alloy plate. Through the method of the present invention, various elements are evenly distributed in the alloy plate, which can reduce or even eliminate the segregation effect of the alloy plate.

[0047] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0048] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0049] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

Claims

1. A process for eliminating segregation of cast-rolled alloy plates, characterized in that: The following steps are involved: S1, feeding the molten material into the molten material box; S2, subjecting the molten material in the melt box to ultrasonic dispersion treatment; S3, preliminarily cooling the molten material in the melt box through the casting roller assembly and casting and rolling it into a continuous billet; S4, further shaping the continuous blanks through secondary cooling; S5, continuously rolling the continuous billet after secondary cooling; S6. The rolled continuous billet is sheared into alloy plates.

2. A device for eliminating segregation of cast and rolled alloy plates according to claim 1, characterized in that: The invention comprises a melt box (1), a casting roll assembly (2), a secondary cooling mechanism (3), a continuous rolling mechanism (4), a cutting mechanism (5) and a collecting box (6) which are arranged in sequence; a feed nozzle (7) is provided at the lower end of the melt box (1); the casting roll assembly (2) is arranged below the melt box (1); the feed nozzle (7) corresponds to the casting and rolling area in the casting roll assembly (2); one end of the secondary cooling mechanism (3) is located below the casting roll assembly (2) and the other end is close to the continuous rolling mechanism (4); the cutting mechanism (5) is located at one end of the continuous rolling mechanism (4) away from the secondary cooling mechanism (3); the collecting box (6) is located at one end of the cutting mechanism (5) away from the continuous rolling mechanism (4); and an ultrasonic dispersion device is installed on the melt box (1).

3. The device for eliminating segregation of cast and rolled alloy plate according to claim 2, characterized in that: The molten material box (1) comprises an outer box (8) and an inner box (9), wherein the inner box (9) is arranged inside the outer box (8), a strip-shaped material supply nozzle (7) is arranged at the lower end of the outer box (8), a material discharge port (14) is opened at the upper end of the inner box (9), and the material discharge port (14) is connected to the upper part of the material supply nozzle (7) through a metal bellows (15), and a foam cushion layer (10), a sponge cushion layer (11) and a foam cushion layer (12) arranged from the inside to the outside are filled between the inner walls of the inner box (9) and the outer box (8). and an asbestos mesh pad layer, the ultrasonic dispersion device comprises a transducer (13) and an ultrasonic controller connected to the transducer (13), a mounting groove is provided on the inner side of the foam pad layer (10), the transducer (13) is mounted in the mounting groove, the ultrasonic controller is arranged outside the outer box (8), and the ultrasonic controller is electrically connected to the transducer (13) via a conductive wire passing through the side wall of the outer box (8), the asbestos mesh layer (12), the sponge pad layer (11) and the foam pad layer (10).

4. The device for eliminating segregation of cast and rolled alloy plate according to claim 3, characterized in that: The casting roll assembly (2) is provided with at least one group, and the multiple groups of casting roll assemblies (2) are arranged in sequence from top to bottom. The casting roll assembly (2) comprises a first casting roll (16) and a second casting roll (17) which are arranged horizontally and in parallel. The first casting roll (16) and the second casting roll (17) are both rotatably mounted on a column. The first casting roll (16) and the second casting roll (17) are synchronously driven to rotate by a first motor. The first casting roll (16) and the second casting roll (17) are arranged with an interval therebetween. The first casting roll (16) and the second casting roll (17) are both provided with a cooling system.

5. The device for eliminating segregation of cast and rolled alloy plate according to claim 4, characterized in that: The surface convexity of the first casting roll (16) and the second casting roll (17) is 0.08 mm and the roughness is 0.09-0.12 mm.

6. The device for eliminating segregation of cast and rolled alloy plate according to claim 4, characterized in that: The area between the lower end of the feed nozzle (7) and the center line of the first casting roller (16) and the second casting roller (17) is the casting zone, and the casting zone is 50 mm.

7. The device for eliminating segregation of cast and rolled alloy plate according to claim 4, characterized in that: The cooling system comprises a plurality of semiconductor refrigeration plates (29), an inner cavity (28) is provided in the first casting roller (16) and the second casting roller (17), the plurality of semiconductor refrigeration plates (29) are arranged in the inner cavity (28), the cooling ends of the plurality of semiconductor refrigeration plates (29) are attached to the inner wall of the inner cavity (28), and a plurality of semiconductor refrigeration sheets are arranged to cover the entire inner wall of the inner cavity (28), the two ends of the inner cavity (28) have heat dissipation holes (30) penetrating the first casting roller (16) and the second casting roller (17), a heat dissipation fan (31) is installed at one end of the inner cavity (28) near the corresponding heat dissipation hole (30), and the air outlet end of the heat dissipation fan (31) is arranged toward the heat dissipation hole (30).

8. The device for eliminating segregation of cast and rolled alloy plate according to claim 2, characterized in that: The secondary cooling mechanism (3) comprises a linear water trough (18), the opening of the water trough (18) faces upward, one end of the water trough (18) is arranged close to the casting roller assembly (2), and the other end of the water trough (18) is arranged close to the continuous rolling mechanism (4), and the bottom of the water trough (18) is connected with a water inlet pipe (19) and a water outlet pipe (20), the water inlet pipe (19) is arranged close to the casting roller assembly (2), and the water outlet pipe (20) is arranged close to the continuous rolling mechanism (4).

9. The device for eliminating segregation of cast and rolled alloy plate according to claim 2, characterized in that: The continuous rolling mechanism (4) comprises a plurality of pressing assemblies arranged in sequence along the direction from the secondary cooling mechanism (3) to the cutting mechanism (5), and the rolling assembly comprises a support column (21), on which a support roller (23) and a rolling roller (22) are rotatably mounted, and the rolling roller (22) is located above the support roller (23) and is driven to rotate by a second motor.

10. The device for eliminating segregation of cast and rolled alloy plate according to claim 2, characterized in that: The cutting mechanism (5) comprises a support frame, a cutting table (24), a pressing mechanism and a cutting knife (26); the cutting table (24) is horizontally mounted on the support frame; the cutting knife (26) is mounted on the support frame through the pressing mechanism so as to move vertically and is located above the cutting table (24); a cutting groove (27) corresponding to the cutting knife (26) is provided on the cutting table (24); the pressing mechanism comprises a hydraulic cylinder (25) vertically mounted on the support frame; an output shaft of the hydraulic cylinder (25) is arranged downward and is connected to the cutting knife (26) through a mounting frame; a vertical guide rod is fixedly mounted on the mounting frame; and a guide sleeve for the guide rod to pass through is provided on the support frame.

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