A step-by-step cutting device for autoclaved aerated concrete blocks

Abstract

The utility model discloses a kind of step-by-step cutting equipment for autoclaved aerated concrete block, including conveying bottom, transverse cutting bin, longitudinal cutting bin, cleaning bin and concrete blank cutting unit, the utility model in the process of using, transverse guide rail will drive auxiliary frame one to move close to the surface of outer layer blank, until the transverse auxiliary roller of auxiliary frame one surface is attached to outer layer blank surface, when plane transverse cutting starts, auxiliary frame one and transverse auxiliary roller will be along outer layer blank surface and descend and move, to carry out external support to the surface of outer layer blank, longitudinal guide rail will drive auxiliary frame two to move close to the surface of outer layer blank, until the vertical auxiliary roller of auxiliary frame two surface is attached to outer layer blank surface, when plane vertical cutting starts, auxiliary frame two and vertical auxiliary roller will be along outer layer blank surface and descend and move, to carry out external support to the surface of outer layer blank, avoid outer layer blank to dump and thus avoid whole group blank collapse.

Description

Technical Field

[0001] This utility model relates to the field of step-by-step cutting technology for concrete blocks, specifically a step-by-step cutting device for autoclaved aerated concrete blocks. Background Technology

[0002] Autoclaved aerated concrete (AAC) blocks are a type of porous, lightweight building material made primarily from fly ash, lime, cement, gypsum, and slag through processes such as batching, mixing, pouring, static curing, cutting, and high-pressure autoclaving.

[0003] The raw materials are treated with a gas-generating agent to form porous blocks. The blocks are then cut into equal portions and subjected to processes such as high-pressure steam curing to produce concrete blocks.

[0004] In the prior art, publication number "CN222609957U" discloses a step-by-step cutting device for autoclaved aerated concrete (AAC) blocks, comprising a main body. A lead screw is movably connected to the inside of the main body near its right side. An mounting plate is disposed below the lead screw, and a cutting machine is fixedly connected to the lower surface of the mounting plate. A fixing plate is fixedly connected to the inside of the main body below the cutting machine. A dust collection mechanism is disposed at the inner bottom of the main body. The dust collection mechanism includes an exhaust fan, a corrugated hose, a pipe, and a dust collection box. The exhaust fan is fixedly connected to the inner bottom of the main body near its right edge. The corrugated hose is fixedly connected to the input end of the exhaust fan and passes through the mounting plate. This utility model has a simple and reasonable structure, effectively addressing the shortcomings of the prior art. By using the dust collection mechanism, the dust generated during cutting can be effectively collected, facilitating subsequent cleaning and maintenance, and reducing dust dispersion.

[0005] However, existing technologies still have significant shortcomings, such as:

[0006] In the aforementioned devices and existing technologies, the billet needs to be cut into equal parts after it is made. During the cutting process, the billet cannot be cut simultaneously in both longitudinal and transverse directions, resulting in low billet cutting efficiency. At the same time, the cut area of ​​the billet cannot be air-cooled and dried during the cutting process, resulting in the cut area of ​​the billet not drying quickly, which affects the production efficiency of subsequent processes such as high-pressure steam curing. Utility Model Content

[0007] The purpose of this invention is to provide a step-by-step cutting device for autoclaved aerated concrete blocks to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a step-by-step cutting device for autoclaved aerated concrete blocks, comprising a conveying base, a cross-cutting chamber, a longitudinal cutting chamber, a cleaning chamber, and a concrete block cutting unit. The cross-cutting chamber, the longitudinal cutting chamber, and the cleaning chamber are sequentially arranged on the top of the conveying base. The concrete block cutting unit is arranged inside the cross-cutting chamber and the longitudinal cutting chamber for cutting the concrete blocks. A conveying cavity is provided at the bottom of the conveying base, a conveying track is installed at the bottom of the conveying cavity, and a conveying vehicle is installed on the top of the conveying track.

[0009] Preferably, the concrete block cutting unit includes a transverse cutting section, the transverse cutting section includes a transverse cutting frame, movable blocks are installed on both sides of the transverse cutting frame, a movable cavity is provided on the surface of the transverse cutting chamber, the movable blocks pass through the movable cavity, a connecting rod is installed between adjacent movable blocks, a synchronization frame is installed at the bottom of the connecting rod, a hydraulic cylinder is embedded in the area near the synchronization frame at the top of the conveying platform, the output end of the hydraulic cylinder is fixed to the bottom of the synchronization frame, transverse cutting wires are installed inside the transverse cutting frame, the transverse cutting wires are set in multiple groups at equal intervals, and transverse stiffeners are installed on the outside of the transverse cutting frame.

[0010] Preferably, the concrete block cutting unit further includes a longitudinal cutting section, which includes a longitudinal cutting frame. Movable blocks are installed on both sides of the longitudinal cutting frame. A movable cavity is provided on the surface of the longitudinal cutting chamber. The movable blocks pass through the movable cavity. A connecting rod is installed between adjacent movable blocks. A synchronization frame is installed at the bottom of the connecting rod. A hydraulic cylinder is embedded in the top of the conveying platform near the synchronization frame. The output end of the hydraulic cylinder is fixed to the bottom of the synchronization frame. Longitudinal cutting wires are installed inside the longitudinal cutting frame. The longitudinal cutting wires are set in multiple groups at equal intervals. Vertical stiffeners are installed on the outside of the longitudinal cutting frame.

[0011] Preferably, the cleaning chamber is equipped with an airflow cleaning unit for removing impurities from the surface of concrete blocks.

[0012] Preferably, the concrete block surface trimming impurity airflow cleaning unit includes a high-pressure air chamber, which is installed on both sides of the cleaning chamber. A top frame is installed on the top of the cleaning chamber, and a rotary joint is installed on the surface of the top frame. A rotating air chamber is installed between adjacent rotary joints. A conduit is connected to one side of each rotary joint and is connected to the high-pressure air chamber. A pre-filter is installed on the top of the high-pressure air chamber. An airflow nozzle is installed on the surface of the rotating air chamber. A driven gear plate is installed at both ends of the rotating air chamber. A geared motor is embedded in the surface of the top frame. A drive gear is installed on the rotating end of the geared motor and meshes with the driven gear plate.

[0013] Preferably, the cross-cut frame area is provided with an anti-tipping part, which includes a transverse guide rail. The transverse guide rail is embedded in both sides of the cross-cut frame. An auxiliary frame is installed on the moving end of the transverse guide rail, and a transverse assist roller is rotatably embedded in the surface of the auxiliary frame.

[0014] Preferably, the longitudinal cutting frame area is provided with an anti-tipping part two, the anti-tipping part two includes a longitudinal guide rail, the longitudinal guide rail is embedded in both sides of the longitudinal cutting frame, an auxiliary frame two is installed on the moving end of the longitudinal guide rail, and a longitudinal assist roller is rotatably embedded in the surface of the auxiliary frame two.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. During use, in order to avoid the problem of the billet tipping over during the planar transverse cutting process, the transverse guide rail can be driven to move the auxiliary frame one close to the surface of the outer billet until the transverse auxiliary roller on the surface of the auxiliary frame one is in contact with the surface of the outer billet. When the planar transverse cutting begins, the auxiliary frame one and the transverse auxiliary roller will move downward along the surface of the outer billet, thereby providing external support for the surface of the outer billet and preventing the outer billet from tipping over and thus preventing the entire set of billets from collapsing.

[0017] 2. In the process of vertical cutting of the plane, in order to avoid the problem of the blank tipping over during the cutting process, the longitudinal guide rail can be driven during the horizontal vertical cutting process. The longitudinal guide rail will drive the auxiliary frame two to move close to the surface of the outer blank until the vertical auxiliary roller on the surface of the auxiliary frame two is in contact with the surface of the outer blank. When the vertical cutting of the plane begins, the auxiliary frame two and the vertical auxiliary roller will move downward along the surface of the outer blank, thereby providing external support for the surface of the outer blank and preventing the outer blank from tipping over, thus preventing the entire set of blanks from collapsing. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall device of this utility model;

[0019] Figure 2 This is a schematic diagram of the transversely cut steel wire portion in this utility model;

[0020] Figure 3 This is a schematic diagram of the longitudinally cut frame portion in this utility model;

[0021] Figure 4 This is a schematic diagram of the top frame and rotating air chamber in this utility model;

[0022] Figure 5 This is a schematic diagram of the transverse frame portion in this utility model.

[0023] In the diagram: 1. Conveying platform; 11. Conveying chamber; 12. Conveying track; 13. Conveying vehicle;

[0024] 2. Cross-cutting chamber; 21. Movable cavity one; 22. Movable block one; 23. Connecting rod one; 24. Synchronizing frame one; 25. Hydraulic cylinder one; 26. Cross-cutting frame; 261. Transverse stiffener; 262. Transverse guide rail; 27. Cross-cutting wire; 28. Auxiliary frame one; 281. Transverse assisting roller;

[0025] 3. Longitudinal cutting chamber; 31. Movable cavity two; 32. Movable block two; 33. Connecting rod two; 34. Synchronous frame two; 35. Hydraulic cylinder two; 36. Longitudinal cutting frame; 361. Vertical stiffener; 362. Longitudinal guide rail; 37. Vertical cutting wire; 38. Auxiliary frame two; 381. Vertical assist roller;

[0026] 4. Clean chamber; 41. High-pressure air chamber; 42. Pre-filter; 43. Conduit;

[0027] 5. Top frame; 51. Rotary joint; 52. Gear motor; 53. Drive gear; 54. Rotating air chamber; 541. Airflow nozzle; 55. Driven gear plate. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figures 1-5 This utility model provides a technical solution:

[0030] Example 1: A step-by-step cutting device for autoclaved aerated concrete blocks: including a conveying base 1, a cross-cutting chamber 2, a longitudinal cutting chamber 3, a cleaning chamber 4, and a concrete block cutting unit. The cross-cutting chamber 2, the longitudinal cutting chamber 3, and the cleaning chamber 4 are sequentially arranged on the top of the conveying base 1. The concrete block cutting unit is arranged inside the cross-cutting chamber 2 and the longitudinal cutting chamber 3 for cutting the concrete blocks. A conveying cavity 11 is provided at the bottom of the conveying base 1. A conveying track 12 is installed at the bottom of the conveying cavity 11. A conveying vehicle 13 is installed on the top of the conveying track 12.

[0031] The concrete block cutting unit includes a transverse cutting section, which includes a transverse cutting frame 26. Movable blocks 22 are installed on both sides of the transverse cutting frame 26. A movable cavity 21 is provided on the surface of the transverse cutting chamber 2. The movable blocks 22 pass through the movable cavity 21. A connecting rod 23 is installed between adjacent movable blocks 22. A synchronous frame 24 is installed at the bottom of the connecting rod 23. A hydraulic cylinder 25 is embedded in the area near the synchronous frame 24 at the top of the conveying platform 1. The output end of the hydraulic cylinder 25 is fixed to the bottom of the synchronous frame 24. Transverse cutting wires 27 are installed inside the transverse cutting frame 26. Multiple sets of transverse cutting wires 27 are set at equal intervals. A transverse stiffener 261 is installed on the outside of the transverse cutting frame 26.

[0032] The concrete block cutting unit also includes a longitudinal cutting section, which includes a longitudinal cutting frame 36. Movable blocks 32 are installed on both sides of the longitudinal cutting frame 36. Movable cavities 31 are provided on the surface of the longitudinal cutting chamber 3. Movable blocks 32 pass through the movable cavities 31. Connecting rods 33 are installed between adjacent movable blocks 32. Synchronizing frames 34 are installed at the bottom of the connecting rods 33. Hydraulic cylinders 35 are embedded in the area near the synchronous frames 34 at the top of the conveying platform 1. The output end of the hydraulic cylinders 35 is fixed to the bottom of the synchronous frames 34. Longitudinal cutting wires are installed inside the longitudinal cutting frame 36. The longitudinal cutting wires are set in multiple groups at equal intervals. Vertical stiffeners 361 are installed on the outside of the longitudinal cutting frame 36.

[0033] In this embodiment, the drive conveyor track 12 transports the conveyor 13 and the billet to the longitudinal cutting chamber 3 for planar vertical cutting processing. When the billet enters the longitudinal cutting chamber 3 and reaches the designated cutting position, the hydraulic cylinder 35 can be driven to drive the synchronous frame 34 and the movable block 32 to descend vertically. During the descent, the movable block 32 drives the longitudinal cutting frame 36 and the vertical cutting wire 37 to perform vertical downward pressing cutting on the surface of the billet, ensuring the vertical cutting effect of the billet.

[0034] The cleaning chamber 4 is equipped with an airflow cleaning unit for cutting impurities from the surface of concrete blocks.

[0035] The airflow cleaning unit for removing impurities from the surface of concrete blocks includes a high-pressure air chamber 41, which is installed on both sides of the cleaning chamber 4. A top frame 5 is installed on the top of the cleaning chamber 4, and a rotary joint 51 is installed on the surface of the top frame 5. A rotating air chamber 54 is installed between adjacent rotary joints 51. A conduit 43 is connected to one side of the rotary joint 51 and is connected to the high-pressure air chamber 41. A pre-filter 42 is installed on the top of the high-pressure air chamber 41. An airflow nozzle 541 is installed on the surface of the rotating air chamber 54. Driven gear discs 55 are installed at both ends of the rotating air chamber 54. A geared motor 52 is embedded in the surface of the top frame 5. A drive gear 53 is installed on the rotating end of the geared motor 52 and meshes with the driven gear disc 55.

[0036] In this embodiment, the airflow nozzle 541 corresponds to the cutting position on the surface of the billet, which allows the jetting airflow to effectively enter the cutting position on the surface of the billet, thereby facilitating airflow drying and dust removal of the cutting area on the surface of the billet. The blown-off dust can be collected through the dust suction channel near the bottom area of ​​the cleaning chamber 4 in the conveying chamber 11. The dust suction channel has a built-in air pump and filter chamber, which facilitates the completion of dust removal and cyclic cleaning of the surface of the billet.

[0037] Example 2:

[0038] Based on Embodiment 1, this embodiment takes into account that after the billet is cut from a whole to equal parts, the outer billet is prone to tipping over and falling into the conveying track 12. Therefore, this embodiment is provided with anti-tipping part 1 and anti-tipping part 2 to avoid the above-mentioned problem.

[0039] An anti-tipping part is provided in the cross-cut frame 26 area. The anti-tipping part includes a transverse guide rail 262. The transverse guide rail 262 is embedded in both sides of the cross-cut frame 26. An auxiliary frame 28 is installed on the moving end of the transverse guide rail 262. A transverse auxiliary roller 281 is rotatably embedded in the surface of the auxiliary frame 28.

[0040] The longitudinal frame 36 area is provided with an anti-tipping part 2, which includes a longitudinal guide rail 362. The longitudinal guide rail 362 is embedded in both sides of the longitudinal frame 36. An auxiliary frame 2 38 is installed on the moving end of the longitudinal guide rail 362. A longitudinal assist roller is rotatably embedded in the surface of the auxiliary frame 2 38.

[0041] In this embodiment, by driving the transverse guide rail 262, the transverse guide rail 262 will drive the auxiliary frame 28 to move close to the surface of the outer blank until the transverse auxiliary roller 281 on the surface of the auxiliary frame 28 is in contact with the surface of the outer blank. When the planar transverse cutting begins, the auxiliary frame 28 and the transverse auxiliary roller 281 will move downward along the surface of the outer blank, thereby providing external support to the surface of the outer blank and preventing the outer blank from tilting and thus preventing the entire set of blanks from collapsing. By driving the longitudinal guide rail 362, the longitudinal guide rail 362 will drive the auxiliary frame 38 to move close to the surface of the outer blank until the vertical auxiliary roller 381 on the surface of the auxiliary frame 38 is in contact with the surface of the outer blank. When the planar vertical cutting begins, the auxiliary frame 38 and the vertical auxiliary roller 381 will move downward along the surface of the outer blank, thereby providing external support to the surface of the outer blank and preventing the outer blank from tilting and thus preventing the entire set of blanks from collapsing.

[0042] Working principle: The operator uses a hoist to transfer the demolded billet to the top of the conveyor trolley 13 inside the conveying chamber 11. After the billet is transferred, the operator drives the conveyor rail 12, which transports the conveyor trolley 13 and the billet to the cross-cutting chamber 2 for planar cross-cutting processing. When the billet enters the cross-cutting chamber 2 and reaches the designated cutting position, the operator can drive the hydraulic cylinder 25 to move it downward. The hydraulic cylinder 25 drives the synchronous frame 24 and the movable block 22 to descend along the inner cavity of the movable chamber 21. During the movement of the movable block 22, it drives the cross-cutting frame 26 and the cross-cutting wire 27 inside the cross-cutting frame 26 to perform cross-cutting and pressing cutting on the billet, ensuring that the billet is effectively cross-cut.

[0043] After the billet is transversely cut, the transverse cutting frame 26 is reset by hydraulic cylinder 25. Then, the conveying track 12 is driven again to transfer the conveying car 13 and the billet to the longitudinal cutting chamber 3 for planar vertical cutting. When the billet enters the longitudinal cutting chamber 3 and reaches the designated cutting position, hydraulic cylinder 35 is driven to drive the synchronous frame 34 and the movable block 32 to descend vertically. During the descent, the movable block 32 drives the longitudinal cutting frame 36 and the vertical cutting wire 37 to perform vertical downward pressing cutting on the surface of the billet, ensuring the vertical cutting effect of the billet.

[0044] In the process of planar transverse slitting of the blank, in order to avoid the blank tipping problem during the slitting process, the transverse guide rail 262 can be driven during the planar transverse cutting process. The transverse guide rail 262 will drive the auxiliary frame 28 to move close to the surface of the outer blank until the transverse auxiliary roller 281 on the surface of the auxiliary frame 28 is in contact with the surface of the outer blank. When the planar transverse cutting begins, the auxiliary frame 28 and the transverse auxiliary roller 281 will move downward along the surface of the outer blank, thereby providing external support for the surface of the outer blank, preventing the outer blank from tipping over and thus preventing the entire set of blanks from collapsing.

[0045] In the process of vertical cutting of the plane, in order to avoid the problem of the blank tipping over during the cutting process, the longitudinal guide rail 362 can be driven during the horizontal vertical cutting of the plane. The longitudinal guide rail 362 will drive the auxiliary frame 38 to move close to the surface of the outer blank until the vertical assist roller 381 on the surface of the auxiliary frame 38 is in contact with the surface of the outer blank. When the vertical cutting of the plane begins, the auxiliary frame 38 and the vertical assist roller 381 will move downward along the surface of the outer blank, thereby providing external support for the surface of the outer blank, preventing the outer blank from tipping over and thus preventing the entire set of blanks from collapsing.

[0046] After the billet has been cut horizontally and vertically, to avoid impurities remaining on the surface of the billet, the conveyor 13 and the billet can be transferred to the cleaning chamber 4 via the drive conveyor rail 12. The geared motor 52 installed inside the cleaning chamber 4 will drive the driven gear 55 to rotate slowly via the drive gear 53. The rotation of the driven gear 55 will in turn drive the rotating air chamber 54 to rotate. During the rotation of the rotating air chamber 54, the airflow injected into the rotating air chamber 54 by the airflow nozzle 541 will circulate and spray outward. The airflow nozzle 541 corresponds to the cutting position on the surface of the billet, which allows the sprayed airflow to effectively enter the cutting position on the surface of the billet, thereby facilitating the airflow drying and dust removal of the cutting area on the surface of the billet. The blown-off dust can be collected through the dust suction channel near the bottom area of ​​the cleaning chamber 4 in the conveying chamber 11. The dust suction channel has a built-in air pump and filter chamber, which facilitates the dust removal and cleaning of the surface of the billet.

[0047] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A step-by-step cutting device for autoclaved aerated concrete blocks, characterized in that: The system includes a conveying platform (1), a cross-cutting chamber (2), a longitudinal cutting chamber (3), a cleaning chamber (4), and a concrete block cutting unit. The cross-cutting chamber (2), the longitudinal cutting chamber (3), and the cleaning chamber (4) are sequentially arranged on the top of the conveying platform (1). The concrete block cutting unit is arranged inside the cross-cutting chamber (2) and the longitudinal cutting chamber (3) for cutting concrete blocks. A conveying cavity (11) is provided at the bottom of the conveying platform (1). A conveying track (12) is installed at the bottom of the conveying cavity (11). A conveying vehicle (13) is installed on the top of the conveying track (12).

2. The step-by-step cutting equipment for autoclaved aerated concrete blocks according to claim 1, characterized in that: The concrete block cutting unit includes a cross-cutting section, which includes a cross-cutting frame (26). Movable blocks (22) are installed on both sides of the cross-cutting frame (26). A movable cavity (21) is provided on the surface of the cross-cutting chamber (2). The movable blocks (22) pass through the movable cavity (21). A connecting rod (23) is installed between adjacent movable blocks (22). A synchronous frame (24) is installed at the bottom of the connecting rod (23). A hydraulic cylinder (25) is embedded in the area near the synchronous frame (24) at the top of the conveying platform (1). The output end of the hydraulic cylinder (25) is fixed to the bottom of the synchronous frame (24). A cross-cutting wire (27) is installed inside the cross-cutting frame (26). The cross-cutting wire (27) is set in multiple groups at equal intervals. A transverse stiffener (261) is installed on the outside of the cross-cutting frame (26).

3. The step-by-step cutting equipment for autoclaved aerated concrete blocks according to claim 2, characterized in that: The concrete block cutting unit also includes a longitudinal cutting section, which includes a longitudinal cutting frame (36). Movable blocks (32) are installed on both sides of the longitudinal cutting frame (36). Movable cavities (31) are provided on the surface of the longitudinal cutting chamber (3). The movable blocks (32) pass through the movable cavities (31). A connecting rod (33) is installed between adjacent movable blocks (32). A synchronous frame (34) is installed at the bottom of the connecting rod (33). A hydraulic cylinder (35) is embedded in the area near the synchronous frame (34) at the top of the conveying platform (1). The output end of the hydraulic cylinder (35) is fixed to the bottom of the synchronous frame (34). Longitudinal cutting wires are installed inside the longitudinal cutting frame (36). The longitudinal cutting wires are set in multiple groups at equal intervals. Vertical stiffeners (361) are installed on the outside of the longitudinal cutting frame (36).

4. The step-by-step cutting equipment for autoclaved aerated concrete blocks according to claim 1, characterized in that: The cleaning chamber (4) is equipped with an airflow cleaning unit for cutting impurities from the surface of concrete blocks.

5. The step-by-step cutting equipment for autoclaved aerated concrete blocks according to claim 4, characterized in that: The concrete block surface cutting impurity airflow cleaning unit includes a high-pressure air chamber (41), which is installed on both sides of the cleaning chamber (4). A top frame (5) is installed on the top of the cleaning chamber (4), and a rotary joint (51) is installed on the surface of the top frame (5). A rotating air chamber (54) is installed between adjacent rotary joints (51). A conduit (43) is connected to one side of the rotary joint (51). The conduit (43) is connected to the high-pressure air chamber (41). A pre-filter (42) is installed on the top of the high-pressure air chamber (41). An airflow nozzle (541) is installed on the surface of the rotating air chamber (54). A driven gear plate (55) is installed at both ends of the rotating air chamber (54). A geared motor (52) is embedded in the surface of the top frame (5). A drive gear (53) is installed on the rotating end of the geared motor (52). The drive gear (53) meshes with the driven gear plate (55).

6. The step-by-step cutting equipment for autoclaved aerated concrete blocks according to claim 3, characterized in that: The transverse frame (26) area is provided with an anti-tipping part, which includes a transverse guide rail (262). The transverse guide rail (262) is embedded in both sides of the transverse frame (26). An auxiliary frame (28) is installed on the moving end of the transverse guide rail (262). A transverse auxiliary roller (281) is rotatably embedded in the surface of the auxiliary frame (28).

7. The step-by-step cutting equipment for autoclaved aerated concrete blocks according to claim 3, characterized in that: The longitudinal cut frame (36) area is provided with an anti-tipping part two, which includes a longitudinal guide rail (362). The longitudinal guide rail (362) is embedded in both sides of the longitudinal cut frame (36). An auxiliary frame two (38) is installed on the moving end of the longitudinal guide rail (362). A longitudinal assist roller is rotatably embedded in the surface of the auxiliary frame two (38).

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