Automatic processing device for steel strip waste edge

Abstract

The invention discloses an automatic device for processing steel strip scraps, which belongs to the technical field of strip coiling, and aims to reduce labor costs and eliminate potential safety hazards. It includes a scrap threading guide groove for guiding the steel strip scraps from the circular shear to the scrap curling machine, wherein the scrap threading guide groove is arranged to be inclined downward from its entrance to its exit; an end vertical guide roller is arranged at the exit of the scrap threading guide groove, and the effective roller surface of the end vertical guide roller protrudes from the inner cavity of the scrap threading guide groove. The automatic device for processing steel strip scraps disclosed by the invention realizes automatic and smooth threading of the scraps through the arrangement of the scrap threading guide groove and the end vertical guide roller, eliminates the manual threading operation, greatly reduces the labor intensity of the workers, reduces labor costs and eliminates potential safety hazards.

Description

Technical Field

[0001] The invention belongs to the technical field of strip steel coiling, and in particular relates to an automatic processing device for steel strip waste edges. Background Art

[0002] In the cold rolling continuous production line, the pickled strip steel needs to be sheared by a circular shear to cut its irregular edges to meet the width requirements of the finished strip steel. At present, there are two main ways to deal with the scrap edges sheared by the circular shear: one is to directly chop the scrap edges and then return the chopped scrap edges to the furnace; the other is to roll the scrap edges into regular scrap edge coils, which can be used as raw materials for small hardware and metal products industries and can be sold like finished steel coils. Since scrap edge coiling has very high economic value, scrap edge coiling machines are widely used.

[0003] However, the waste edges cut by the prior art disc shears are usually manually threaded to the waste edge coiling machine, and the waste edges are also cut manually using handheld scissors, which increases the labor intensity of the workers and poses a safety hazard.

[0004] There are also domestic ones that use the threading guide groove to automatically thread the waste edge wire, but it often gets stuck, affecting production efficiency; and there is no waste edge shear, and the shearing of the waste edge still needs manual shearing, which also has high labor intensity and safety hazards for workers. In addition, manual operation requires a long downtime, which greatly affects the production rhythm and production efficiency of the unit. Summary of the invention

[0005] In order to solve the problem of manual belt threading at present, the present invention provides an automatic processing device for steel belt scrap edges, which can realize automatic and smooth belt threading and scrap edge shearing, eliminate manual operation, greatly reduce the labor intensity of workers, reduce labor costs and eliminate safety hazards.

[0006] The technical solution adopted by the present invention is: an automatic processing device for steel strip scraps, including a scrap strip threading guide groove for guiding the steel strip scraps from a disc shear to a scrap strip curling machine, wherein the scrap strip threading guide groove is arranged to be inclined downward from its entrance to its exit; an end vertical guide roller is arranged at the exit of the scrap strip threading guide groove, and the effective roller surface of the end vertical guide roller protrudes from the inner cavity of the scrap strip threading guide groove.

[0007] Furthermore, the waste edge threading guide groove comprises a guide groove segment 1, a guide groove segment 2 and a guide groove segment 3;

[0008] A middle vertical guide roller is arranged between the outlet of guide groove segment one and the inlet of guide groove segment two, and an end vertical guide roller is arranged at the outlet of guide groove segment three; a waste edge shear is arranged between the outlet of guide groove segment two and the inlet of guide groove segment three; the effective roller surface of the middle vertical guide roller protrudes from the inner cavity of the waste edge threading guide groove; the guide groove segment one, the middle vertical guide roller, the guide groove segment two, the waste edge shear, the guide groove segment three and the end vertical guide roller are connected in sequence to form a waste edge threading channel which is closed on all sides and connected at both ends.

[0009] Furthermore, the end vertical guide roller and the middle vertical guide roller adopt the same structure, both including a vertical roller bracket and a roller assembly;

[0010] The vertical roller bracket includes a bottom plate and side plates on both sides of the bottom plate, and a U-shaped groove structure is formed by the bottom plate and the side plates; the horizontally arranged roller assembly is installed on the bottom plate, and the vertically arranged roller assemblies are respectively installed on the inner sides of the side plates; the horizontally arranged roller assembly and the vertically arranged roller assembly are surrounded to form a U-shaped guide opening.

[0011] Furthermore, along the conveying direction of the scrap edge of the steel strip, the horizontally arranged roller assembly is located in front of the vertically arranged roller assembly.

[0012] Furthermore, the cross section of the waste edge belt threading channel is square.

[0013] Furthermore, the guide groove segment 1 is a hollow cylindrical structure which is closed on all sides and connected at both ends, and the guide groove segment 1 is in a trumpet shape which gradually narrows along the direction from the belt passing inlet to the belt passing outlet.

[0014] Furthermore, a movable door leading to the inner cavity of the guide groove segment one is arranged on the side wall of the guide groove segment one.

[0015] Furthermore, the waste edge shear comprises a shears frame, an upper connecting beam, shearing hydraulics, a lower fixed shear blade support, an upper movable shear blade support and a shearing blade; the shears frame is a U-shaped frame with an open top, the upper connecting beam is detachably mounted on the top of the shears frame, and the upper connecting beam and the shears frame form a closed hollow frame; the inner side wall of the shears frame is provided with a guide groove, the two ends of the upper movable shear blade support are inserted into the guide groove, and the shearing hydraulics are installed on the upper connecting beam, and its piston rod passes through the upper connecting beam and is connected to the upper movable shear blade support, driving the upper movable shear blade support to move in a straight line along the guide groove; the lower fixed shear blade support is installed on the bottom wall of the shears frame; the shearing blade on the upper movable shear blade support is aligned with the shearing blade of the lower fixed shear blade support.

[0016] Furthermore, the scissors frame is supported on the second fixed bracket; the vertical roller bracket is supported on the second fixed bracket.

[0017] Furthermore, the guide groove segment two is a hollow box structure with two ends connected, one end of which is the inlet end and the other end is the outlet end; an outwardly folded outlet flange is provided at the outlet end, and the outlet flange is connected to the inlet side of the scissors frame; and the inner bottom wall of the guide groove segment two is aligned with the shearing blade on the upper movable shearing blade support; a notch is provided at the bottom of the inlet end, which passes through the inlet end longitudinally and the bottom surface vertically; the inlet end extends to the vertical roller bracket, and the horizontally arranged roller assembly is stuck in the notch; the guide groove segment three is a hollow box structure with two ends connected, one end of which is the inlet end and the other end is the outlet end; an outwardly folded inlet flange is provided at the inlet end, and the inlet flange is connected to the outlet side of the scissors frame; and the inner bottom wall of the guide groove segment three is located below the shearing blade on the upper movable shearing blade support; arc-shaped notches that pass through vertically are provided on both sides of the outlet end; the inlet end extends to the vertical roller bracket, and the vertically arranged roller assembly is stuck in the arc-shaped notch.

[0018] The beneficial effects of the present invention are as follows: the automatic processing device for scrap edge of steel strip disclosed in the present invention realizes automatic and smooth strip threading of scrap edges through the arrangement of scrap edge threading guide grooves and end vertical guide rollers, eliminates manual strip threading operations, greatly reduces the labor intensity of workers, reduces labor costs and eliminates safety hazards.

[0019] By arranging a waste edge shear in the middle of the waste edge threading guide groove, mechanical shearing of the waste edge is achieved, manual shearing is eliminated, the labor intensity of workers is greatly reduced, the labor cost is further reduced and safety hazards are eliminated.

[0020] By setting a middle vertical guide roller at the rear side of the scrap shear, the scrap head can be smoothly introduced into the scrap shear, and the end vertical guide roller plays a role in steering, guiding and positioning the scrap, and introduces the scrap into the scrap coiler.

[0021] By arranging two automatic steel strip scrap edge processing devices between the circular shear and the scrap edge coiling machine, and coordinating with the vertical guide roller to position the steel strip scrap edges on both sides of the strip, the distance between the steel strip scrap edges on both sides of the strip is the distance between the two reels of the scrap edge coiling machine, and in combination with the wiring device of the scrap edge coiling machine itself, the scrap edge can be rolled up to the entire reel with good winding uniformity. It has the advantages of high success rate of strip threading, short strip threading time, simple structure and easy implementation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is the layout diagram of the automatic processing device for steel strip scrap;

[0023] Figure 2 for Figure 1 A top view of

[0024] Figure 3 A three-dimensional diagram of the automatic processing device for steel strip waste edge of the present invention;

[0025] Figure 4 It is a front view of the automatic processing device for steel strip scrap edge of the present invention;

[0026] Figure 5 for Figure 4 A top view of

[0027] Figure 6 It is a three-dimensional diagram of the vertical guide roller;

[0028] Figure 7 Cut the main view for the scrap edge;

[0029] Figure 8 for Figure 7 CC section view;

[0030] Fig. 9 for Figure 7 DD cross-sectional view;

[0031] Fig.10 is a stereogram of a guide groove segment;

[0032] Fig.11 It is a stereoscopic view of the second guide groove segment;

[0033] Fig.12 It is a three-dimensional diagram of the guide groove segment.

[0034] In the figure: guide groove segment 1, movable door 11, middle vertical guide roller 2A, end vertical guide roller 2B, vertical roller bracket 21, bottom plate 21A, side plate 21B, roller assembly 22, guide port 23, scrap edge shear 3, shear frame 31, guide groove 31A, upper connecting beam 32, shear hydraulic 33, shear blade 34, lower fixed shear blade support 35, upper movable shear blade support 36, guide groove segment two 4, outlet flanging 41, notch 42, guide groove segment three 5, inlet flanging 51, arc notch 52, fixed bracket one 6, fixed bracket two 7, steel strip scrap edge 8, disc shear 9, scrap edge curling machine 10. DETAILED DESCRIPTION

[0035] The present invention will be further described below in conjunction with the accompanying drawings:

[0036] Automatic processing device for steel strip waste edge, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, it includes a scrap edge threading guide groove for guiding the scrap edge 8 of the steel strip from the disc shear 9 to the scrap edge curling machine 10, and the scrap edge threading guide groove is arranged to be inclined downward from its entrance to the exit; an end vertical guide roller 2B is arranged at the exit of the scrap edge threading guide groove, and the effective roller surface of the end vertical guide roller 2B protrudes from the inner cavity of the scrap edge threading guide groove.

[0037] The automatic processing device for steel strip waste edge disclosed by the present invention is as follows: Figure 1 and Figure 2 As shown, the inlet of the scrap edge threading guide groove is aligned with the discharge port of the circular shear 9, and the outlet of the scrap edge threading guide groove is aligned with the scrap edge curling machine 10, so that a threading channel is formed between the circular shear 9 and the scrap edge curling machine 10, and the steel strip scrap edge cut by the circular shear 9 is transported along the threading channel to the scrap edge curling machine 10 to be rolled into a steel coil. Automatic threading of the steel strip scrap edge 8 is achieved, manual threading is avoided, the labor intensity of workers is greatly reduced, the labor cost is reduced, the safety hazard is eliminated, and the threading efficiency is improved.

[0038] The end vertical guide roller 2B arranged at the exit plays a role in guiding and diverting the scrap edge 8 of the steel strip, and can realize effective and reliable guidance of the scrap edge 8 of the steel strip, thereby reducing the occurrence of the jamming phenomenon of the scrap edge 8 of the steel strip.

[0039] Moreover, during the curling process of the scrap edge curling machine 10, the reel of the scrap edge curling machine 10 reciprocates along its axial direction so that the steel strip scrap edge 8 is evenly wound on the reel of the scrap edge curling machine 10, and the end vertical guide roller 2B plays a positioning role for the steel strip scrap edge 8 to prevent the steel strip scrap edge 8 from following the movement of the reel.

[0040] When the traditional steel strip scrap 8 is rolled up, it is cut by hand-held scissors, which is labor-intensive and has safety hazards. In the present invention, the scrap strip threading guide groove includes a guide groove segment 1, a guide groove segment 2 4 and a guide groove segment 3 5; a middle vertical guide roller 2A is arranged between the outlet of the guide groove segment 1 and the inlet of the guide groove segment 2 4, and an end vertical guide roller 2B is arranged at the outlet of the guide groove segment 3 5; a scrap strip shear 3 is arranged between the outlet of the guide groove segment 2 4 and the inlet of the guide groove segment 3 5; the effective roller surface of the middle vertical guide roller 2A protrudes from the inner cavity of the scrap strip threading guide groove; the guide groove segment 1 1, the middle vertical guide roller 2A, the guide groove segment 2 4, the scrap strip shear 3, the guide groove segment 3 5 and the end vertical guide roller 2B are connected in sequence to form a scrap strip threading channel that is closed on all sides and connected at both ends. Among them, the scrap strip shear 3 is used to cut the steel strip scrap 8. A middle vertical guide roller 2A is arranged at the rear side of the scrap edge shear 3, and the middle vertical guide roller 2A guides the scrap edge 8 of the steel strip, and smoothly introduces the edge head of the scrap edge 8 of the steel strip into the scrap edge shear 3 for shearing.

[0041] Preferably, the end vertical guide roller 2B and the middle vertical guide roller 2A adopt the same structure, both including a vertical roller bracket 21 and a roller assembly 22; the vertical roller bracket 21 includes a bottom plate 21A and side plates 21B on both sides of the bottom plate 21A, and is surrounded by the bottom plate 21A and the side plates 21B to form a U-shaped groove structure; the horizontally arranged roller assembly 22 is installed on the bottom plate 21A, and the vertically arranged roller assemblies 22 are respectively installed on the inner sides of the side plates 21B; the horizontally arranged roller assembly 22 and the vertically arranged roller assembly 22 surround to form a U-shaped guide opening 23.

[0042] like Figure 6As shown, the end vertical guide roller 2B and the middle vertical guide roller 2A disclosed in the present invention, the horizontally arranged roller assembly 22 and the vertically arranged roller assembly 22 surround to form a U-shaped guide opening 23, and the steel strip scrap 8 passes through the guide opening 23 to position the strip head. The horizontally arranged roller assembly 22 plays a steering support role for the steel strip scrap 8, and the vertically arranged roller assembly 22 plays a diversion and positioning role for the steel strip scrap 8. Among them, the middle vertical guide roller 2A plays a role in smoothly introducing the scrap head into the scrap shear 3, and the end vertical guide roller 2B plays a steering, guiding and positioning role for the steel strip scrap 8, and introduces the steel strip scrap 8 into the scrap curling machine 10.

[0043] The vertically arranged roller assembly 22 and the horizontally arranged roller assembly 22 can be coplanar. In the present invention, preferably, along the conveying direction of the steel strip scrap 8, the horizontally arranged roller assembly 22 is located in front of the vertically arranged roller assembly 22. In this structure, when the scrap edge of the steel strip scrap 8 is conveyed, it first contacts the vertically arranged roller assemblies 22 on both sides. The vertically arranged roller assembly 22 rotates to introduce the scrap edge of the steel strip 8 into between the vertically arranged roller assemblies 22. The vertically arranged roller assembly 22 limits the steel strip scrap 8 from both sides, and conveys the steel strip scrap 8 forward under the rotation of the roller assemblies 22 on both sides. The horizontally arranged roller assembly 22 supports the steel strip scrap 8, reduces the friction resistance of the steel strip scrap 8 conveyed forward, and is also conducive to the turning of the steel strip scrap 8.

[0044] The steel strip is usually in a plate shape, and the steel strip scrap 8 has a large width-to-thickness ratio. In order to adapt to the shape of the steel strip scrap 8, preferably, the cross-section of the scrap strip passage is square.

[0045] In order to ensure smooth and automatic threading of the waste edge, it is preferred that Fig.10 As shown, the guide groove segment 1 is a hollow cylindrical structure which is closed on all sides and has two through ends. The guide groove segment 1 is in a trumpet shape which gradually narrows along the direction from the belt passing inlet to the belt passing outlet.

[0046] The guide groove segment 1 may be a closed hollow cylinder welded with steel plates, so that the steel strip scrap 8 can only run in the closed hollow cavity, which is convenient for the threading of the steel strip scrap 8 and the guidance of the strip head. During the threading of the steel strip scrap 8, the strip head may be stuck on the inner wall of the guide groove segment 1. In order to quickly handle the stuck strip head, a movable door 11 for leading to the inner cavity of the guide groove segment 1 is provided on the side wall of the guide groove segment 1. When the strip head is stuck, open the movable door 11 for processing, and close the movable door 11 after completion.

[0047] The guide groove segment 1 is in a trumpet shape that gradually narrows from its belt-threading entrance to its belt-threading exit, that is, the belt-threading entrance of the guide groove segment 1 is large. Considering that the change in the position of the steel strip waste edge 8 caused by the change in the width of the strip, the belt-threading entrance of the guide groove segment 1 is set to a larger trumpet, so that when the steel strip span changes within a certain range, the steel strip waste edge 8 can smoothly pass into the guide groove segment 1. The exit of the guide groove segment 1 gradually narrows and smoothly connects with the middle vertical guide roller 2A to ensure the smooth threading of the steel strip waste edge 8. Therefore, the function of the guide groove segment 1 is to smoothly and automatically introduce the steel strip waste edge 8 cut from the strip into the middle vertical guide roller 2A. The guide groove segment 1 is installed on a fixed bracket 6.

[0048] Preferably, Figure 7 , Figure 8 and Fig. 9 As shown, the scrap shear 3 includes a shear frame 31, an upper connecting beam 32, a shear hydraulic 33, a lower fixed shear blade support 35, an upper movable shear blade support 36, a shear blade 34 and;

[0049] The scissors frame 31 is a U-shaped frame with an open top, and the upper connecting beam 32 is detachably installed on the top of the scissors frame 31, and the upper connecting beam 32 and the scissors frame 31 form a closed hollow frame; the inner wall of the scissors frame 31 is provided with a guide groove 31A, and the two ends of the upper movable shear blade support 36 are inserted into the guide groove 31A, and the shear hydraulic pressure 33 is installed on the upper connecting beam 32, and its piston rod passes through the upper connecting beam 32 and is connected to the upper movable shear blade support 36, driving the upper movable shear blade support 36 to move linearly along the guide groove 31A; the lower fixed shear blade support 35 is installed on the bottom wall of the scissors frame 31; the shearing blade on the upper movable shear blade support 36 is aligned with the shearing blade 34 of the lower fixed shear blade support 35.

[0050] During shearing, the piston rod of the shear hydraulic 33 extends, pushing the upper movable shear blade support 36 to move downward along the guide groove 31A, and the shear blade 34 on the upper movable shear blade support 36 and the shear blade 34 of the lower fixed shear blade support 35 face each other to shear the waste edge 8 of the steel strip.

[0051] The scissors frame 31 is supported on the second fixed bracket 7 ; the vertical roller bracket 21 is supported on the second fixed bracket 7 .

[0052] In order to ensure that the steel strip scrap 8 smoothly passes through the scrap cutter 3, preferably, as Fig.11As shown, the guide groove segment 2 4 is a hollow box structure with two ends connected, one end of which is the inlet end and the other end is the outlet end; an outwardly folded outlet flange 41 is provided at the outlet end, and the outlet flange 41 is connected to the inlet side of the scissors frame 31; and the inner bottom wall of the guide groove segment 2 4 is aligned with the shear blade on the upper movable shear blade support 36. A notch 42 is provided at the bottom of the inlet end, which passes through the inlet end in the longitudinal direction and the bottom surface in the vertical direction; the inlet end extends to the vertical roller support 21, and the horizontally arranged roller assembly 22 is stuck in the notch 42, so that the effective roller surface of the roller assembly 22 protrudes from the inner cavity of the guide groove segment 2 4.

[0053] like Fig.12 As shown, the guide groove segment three 5 is a hollow box structure with two ends connected, one end of which is the inlet end and the other end is the outlet end; an outwardly folded inlet flange 51 is provided at the inlet end, and the inlet flange 51 is connected to the outlet side of the scissors frame 31; and the inner bottom wall of the guide groove segment three 5 is located below the shear blade on the upper movable shear blade support 36. An arc-shaped notch 52 that penetrates vertically is provided on both sides of the outlet end; the inlet end extends to the vertical roller support 21, and the vertically arranged roller assembly 22 is stuck in the arc-shaped notch 52. Similarly, the vertically arranged roller assembly 22 is stuck in the arc-shaped notch 52, and its effective roller surface protrudes from the guide groove segment three 5.

Claims

1. Automatic processing device for steel strip waste edge, characterized by: It comprises a scrap edge threading guide groove for guiding the scrap edge of a steel strip (8) from a circular shear (9) to a scrap edge curling machine (10), wherein the scrap edge threading guide groove is arranged to be inclined downward from its entrance to its exit; an end vertical guide roller (2B) is arranged at the exit of the scrap edge threading guide groove, and the effective roller surface of the end vertical guide roller (2B) protrudes from the inner cavity of the scrap edge threading guide groove; The waste edge threading guide groove comprises a guide groove segment one (1), a guide groove segment two (4) and a guide groove segment three (5); A middle vertical guide roller (2A) is arranged between the outlet of guide groove segment 1 (1) and the inlet of guide groove segment 2 (4), and an end vertical guide roller (2B) is arranged at the outlet of guide groove segment 3 (5); a waste edge shear (3) is arranged between the outlet of guide groove segment 2 (4) and the inlet of guide groove segment 3 (5); the effective roller surface of the middle vertical guide roller (2A) protrudes from the inner cavity of the waste edge belt threading guide groove; the guide groove segment 1 (1), the middle vertical guide roller (2A), the guide groove segment 2 (4), the waste edge shear (3), the guide groove segment 3 (5) and the end vertical guide roller (2B) are connected in sequence to form a waste edge belt threading channel which is closed on all sides and connected at both ends; The end vertical guide roller (2B) and the middle vertical guide roller (2A) adopt the same structure, both comprising a vertical roller bracket (21) and a roller assembly (22); The vertical roller support (21) comprises a bottom plate (21A) and side plates (21B) on both sides of the bottom plate (21A), and the bottom plate (21A) and the side plates (21B) are surrounded to form a U-shaped groove structure; the horizontally arranged roller assembly (22) is installed on the bottom plate (21A), and the vertically arranged roller assembly (22) is installed on the inner side of the side plates (21B); the horizontally arranged roller assembly (22) and the vertically arranged roller assembly (22) are surrounded to form a U-shaped guide opening (23); The guide groove segment one (1) is a hollow cylindrical structure which is closed on all sides and connected at both ends. The guide groove segment one (1) is in a trumpet shape which gradually narrows along the direction from the belt threading inlet to the belt threading outlet.

2. The automatic steel strip scrap processing device according to claim 1, characterized in that: Along the conveying direction of the steel strip waste edge (8), the horizontally arranged roller assembly (22) is located in front of the vertically arranged roller assembly (22).

3. The automatic steel strip scrap processing device according to claim 1 or 2, characterized in that: The cross section of the waste edge belt threading channel is square.

4. The automatic steel strip scrap processing device according to claim 3, characterized in that: A movable door (11) for leading to the inner cavity of the guide groove segment one (1) is arranged on the side wall of the guide groove segment one (1).

5. The automatic steel strip scrap processing device according to claim 1 or 2, characterized in that: The scrap shear (3) comprises a shear frame (31), an upper connecting beam (32), shear hydraulics (33), a lower fixed shear blade support (35), an upper movable shear blade support (36) and a shear blade (34); The scissors frame (31) is a U-shaped frame with an open top, and the upper connecting beam (32) is detachably mounted on the top of the scissors frame (31), and the upper connecting beam (32) and the scissors frame (31) form a closed hollow frame; the inner side wall of the scissors frame (31) is provided with a guide groove (31A), and both ends of the upper movable shear blade support (36) are inserted into the guide groove (31A), and the shear hydraulic pressure (33) is installed on the upper connecting beam (32), and its piston rod passes through the upper connecting beam (32) and is connected to the upper movable shear blade support (36), so as to drive the upper movable shear blade support (36) to move linearly along the guide groove (31A); The lower fixed shear blade support (35) is mounted on the bottom wall of the shear frame (31); The shearing blade on the upper movable shearing blade support (36) is aligned with the shearing blade (34) of the lower fixed shearing blade support (35).

6. The automatic steel strip scrap processing device according to claim 5, characterized in that: The scissors frame (31) is supported on the second fixed bracket (7); and the vertical roller bracket (21) is supported on the second fixed bracket (7).

7. The automatic steel strip scrap processing device according to claim 6, characterized in that: The guide groove segment 2 (4) is a hollow box structure with two ends connected, one end of which is an inlet end and the other end is an outlet end; an outlet flange (41) folded outward is provided at the outlet end, and the outlet flange (41) is connected to the inlet side of the scissors frame (31); and the inner bottom wall of the guide groove segment 2 (4) is aligned with the shear blade on the upper movable shear blade support (36); A notch (42) is provided at the bottom of the inlet end, which passes through the inlet end in the longitudinal direction and the bottom surface in the vertical direction. The inlet end extends to the vertical roller bracket (21), and the horizontally arranged roller assembly (22) is stuck in the notch (42). The guide groove segment three (5) is a hollow box structure with two ends connected, one end of which is an inlet end and the other end is an outlet end; an outwardly folded inlet flange (51) is provided at the inlet end, and the inlet flange (51) is connected to the outlet side of the scissors frame (31); and the inner bottom wall of the guide groove segment three (5) is located below the shear blade on the upper movable shear blade support (36); Arc-shaped notches (52) that penetrate vertically are provided on both sides of the outlet end; the inlet end extends to the vertical roller bracket (21), and the vertically arranged roller assembly (22) is clamped in the arc-shaped notches (52).

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