A disk shear flow guiding groove and a disk shear

Abstract

The present invention provides a disk shear flow guide groove and a disk shear. The disk shear flow guide groove includes: a connecting seat adapted to be connected to an external frame; a flow guide groove main body fixedly connected to the connecting seat; the flow guide groove main body includes a top wall plate, a side wall plate and a bottom wall plate connected to each other, and ventilation holes are formed in the top wall plate in an array; an internal blowing device adapted to blow air into the interior of the flow guide groove main body; the internal blowing device is located at the downstream end of the strip relative to the ventilation holes; the internal blowing device includes an internal blower main body, an internal blower gasket and a first blowing slit; the first blowing slit is formed in the top wall plate and penetrates the top wall plate, and the width of the first blowing slit is 1-2 mm; the internal blower main body is located on the upper surface of the top wall plate and communicates with the first blowing slit, and the internal blower gasket is arranged between the internal blower main body and the top wall plate. This device overcomes the defect that the disk shear flow guide groove in the prior art is prone to increasing the running resistance of the edge strip when guiding the edge strip, and further causing the edge strip to fly out of the flow guide groove.

Description

Technical Field

[0001] The present invention relates to the technical field of strip manufacturing equipment, and particularly relates to a deflector chute for a circular shear and a circular shear. Background Art

[0002] A circular shear is a device that uses at least a pair of disk cutters with aligned ends and axially staggered to perform shearing. Because its disk cutters can rotate continuously, it can continuously perform shearing, especially suitable for longitudinally shearing moving plates or strips. Therefore, in a cold-rolled strip longitudinal shearing and recoiling production line, it is mainly used for trimming the edges of the strip. A pair of circular shears are symmetrically arranged on both sides of the strip to trim the edges of the strip, ensure the straightness of the strip edges, and make the strip reach a predetermined width dimension. And for the side strips sheared off, a deflector chute is needed to change their movement direction and guide them into the waste hopper.

[0003] Since the disk cutters are high-speed moving parts and the deflector chute is a stationary part, a certain gap needs to be left between them during installation to avoid accidental collisions. And the thickness of the side strip is generally 0.1 - 0.5 mm and the width is not more than 10 mm. It is a material lacking sufficient rigidity and prone to deformation. During the guiding process, the side strip is very easy to rub against the inner wall of the deflector chute, thus increasing its movement resistance. Once the traveling resistance at the downstream end of the side strip is large, its upstream end is very easy to bend or deflect, which may cause the side strip to emerge from the gap between the deflector chute and the disk cutter, and then fly out of the deflector chute driven by the high-speed rotating disk cutter. This not only makes the side strip deviate from the predetermined guiding path, but also easily causes faults such as cutter jamming. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the deflector chute of the existing circular shear is prone to increasing the running resistance of the side strip during guiding, and further causing the side strip to fly out of the deflector chute.

[0005] To solve the above technical problem, the present application provides a deflector chute for a circular shear, comprising:

[0006] A connecting seat adapted to be connected to an external frame;

[0007] A deflector chute main body adapted to guide the side strip sheared from the strip and fixedly connected to the connecting seat; the deflector chute main body includes a top wall plate, a side wall plate and a bottom wall plate connected to each other. Long strip-shaped ventilation holes are arranged side by side on the top wall plate; the ventilation holes are arranged along the length direction of the deflector chute main body;

[0008] The internal blowing device is adapted to blow air flow into the inside of the guiding trough body; the internal blowing device is located at the downstream end of the strip with respect to the ventilation hole; the internal blowing device includes an internal blower body, an internal blower gasket, and a first blowing slit; the first blowing slit is formed on the top wall plate and penetrates through the top wall plate, and the width of the first blowing slit is 1-2 mm; the internal blower body is located on the upper surface of the top wall plate and is communicated with the first blowing slit, and the internal blower gasket is arranged between the internal blower body and the top wall plate.

[0009] Further, the cross-section of the guiding trough body is a semi-surrounding structure in a C shape, and the side opening of the guiding trough body faces the side where the strip is located.

[0010] Further, the projection of the sheared edge of the strip on the top wall plate is a shearing projection line; the first blowing slit is obliquely intersecting with the shearing projection line; the upstream end of the first blowing slit is close to the side where the strip is located, and the other end of the first blowing slit is far from the side where the strip is located.

[0011] Further, the included angle between the first blowing slit and the shearing projection line is β, and β ≤ 20°.

[0012] Further, the top wall plate is divided into an inner area and an outer area by the shearing projection line, and the inner area is located on the side far from the side where the strip is located with respect to the outer area; the ventilation hole is only arranged in the inner area, and the first blowing slit is continuously arranged in the inner area and the outer area.

[0013] Further, the internal blower body has a structure with one end large and the other end small; the large end of the internal blower body is located at the downstream end of the strip with respect to the small end; an internal blower joint is arranged at the large end of the internal blower body.

[0014] Further, an external blowing device is arranged at the downstream end of the top wall plate; the external blowing device is adapted to blow air flow in the downstream direction of the top wall plate.

[0015] Further, the external blowing device includes an external blower body and an external blower gasket; the external blower body is located on the upper surface of the top wall plate, and the external blower gasket is arranged between the external blower body and the top wall plate; the external blower gasket is a semi-surrounding structure in a C shape, and the side opening of the external blower gasket, the bottom surface of the external blower body, and the upper surface of the top wall plate jointly form a second blowing slit, and the second blowing slit faces the downstream direction of the top wall plate.

[0016] Further, when observed from the side view direction, the included angle between the top wall plate and the moving direction of the strip is α,

[0017] ;

[0018] where ρ is the density of the edge strip (g / m 3 ) and g is the acceleration due to gravity (m / s 2), δ is the thickness of the side strip (mm), w is the width of the side strip (mm), and v is the running speed of the side strip (m / min).

[0019] A circular saw, comprising:

[0020] A frame;

[0021] Circular cutting tools, arranged on the frame and adapted to cut the strip steel;

[0022] The aforementioned circular saw guide groove is located downstream of the circular cutting tool; the connecting seat is connected to the frame.

[0023] By adopting the above technical solution, the present invention has the following technical effects:

[0024] The circular saw guide groove provided by the present invention can form an open structure on the top wall plate by arranging long strip-shaped ventilation holes. Even if the side strip fits against the top wall plate under inertial force, the fitting surface of the side strip can drive the air in the long strip-shaped ventilation holes, thereby forming an air pressure that reduces the pressure on the other side, and further reducing the side strip friction. The ventilation holes are set as long strip-shaped in order to promote the fitting surface of the side strip to drive the air flow and prevent the driven air flow from being blocked by conventional isolated holes and reducing the flow rate, so that a relatively higher air pressure can be generated on the fitting surface of the side strip. In addition, the device is also provided with an internal blowing device, which blows the side strip to separate the side strip from the top wall plate, thereby shortening the contact section between the side strip and the top wall plate, making the side strip mainly suspended in the air, and thus reducing the running resistance of the side strip. Description of the Drawings

[0025] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 It is a schematic three-dimensional structure diagram of Embodiment 2 of the present invention;

[0027] Figure 2 It is a schematic exploded view of the structure of Embodiment 1 of the present invention;

[0028] Figure 3 It is a schematic side view of the structure of the guide groove main body of Embodiment 1 of the present invention;

[0029] Figure 4 It is a schematic top view of the structure of the guide groove main body of Embodiment 1 of the present invention;

[0030] Figure 5Schematic diagram of the action of the first blowing slit of Embodiment 1 of the present invention on the expected sideband;

[0031] Figure 6 Schematic perspective view of the structure of the inner blower body of Embodiment 1 of the present invention;

[0032] Figure 7 Schematic perspective view of the structure of the outer blower body of Embodiment 1 of the present invention.

[0033] Explanation of reference numerals:

[0034] 1 - Main body of the diversion groove, 2 - Inner blower body, 3 - Inner blower gasket, 4 - Outer blower body, 5 - Outer blower gasket, 6 - Top wall plate, 7 - Side wall plate, 8 - Bottom wall plate, 9 - Connecting seat, 10 - Inner side area, 11 - Outer side area, 12 - Vent hole, 13 - First blowing slit, 14 - Inner blower joint, 15 - Outer blower joint, 16 - Shearing projection line, 17 - Inner cavity of the outer blower, 18 - Outer blower interface, 19 - Inner cavity of the inner blower, 20 - Inner blower interface, 21 - Upper cutter head, 22 - Lower cutter head, 23 - Machine frame, 24 - Second blowing slit. Detailed implementation manners

[0035] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0036] It should be noted that in the description of the present invention, the coordinate system adopted when describing the orientation is determined based on the attitude of the corresponding component's front view, and the viewing angle naming of the corresponding view is also based on this. Therefore, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 construed as a limitation to the present invention.

[0037] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0038] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. Embodiment 1

[0039] This embodiment provides a deflector chute for a circular shear.

[0040] In one embodiment, as Figures 1 to 7 shown, it includes a connecting seat 9, a deflector chute main body 1 and an internal blowing device. The connecting seat 9 is adapted to be connected to an external frame 23. The deflector chute main body 1 is adapted to guide the side strips sheared from the strip steel and is fixedly connected to the connecting seat 9; the deflector chute main body 1 includes a connected top wall plate 6, side wall plates 7 and a bottom wall plate 8, and long strip-shaped ventilation holes 12 are arranged side by side on the top wall plate 6. The ventilation holes 12 are arranged along the length direction of the deflector chute main body 1. The internal blowing device is adapted to blow air into the interior of the deflector chute main body 1. The internal blowing device is located at the downstream end of the strip steel relative to the ventilation holes 12; the internal blowing device includes an internal blower main body 2, an internal blower gasket 3 and a first blowing slit 13; the first blowing slit 13 is opened on the top wall plate 6 and penetrates the top wall plate 6. To make the airflow more powerful, the width of the first blowing slit 13 is 1-2 mm. The internal blower main body 2 is located on the upper surface of the top wall plate 6 and is communicated with the first blowing slit 13 through an internal blower cavity 19. The internal blower main body 2 is arranged on the upper surface of the top wall plate 6, that is, outside the deflector chute main body 1, which can avoid occupying the internal space of the deflector chute and make the inner wall of the deflector chute as smooth as possible for guiding. The internal blower gasket 3 is arranged between the internal blower main body 2 and the top wall plate 6 for filling the gap between the two for sealing.

[0041] There are two main reasons for the friction between the side strip and the inner wall of the existing deflector chute: one is that since the deflector chute changes the original movement direction of the side strip, the side strip will generate friction with the guiding wall surface of the deflector chute under the action of inertia force. For a deflector chute that usually guides the side strip downward into the waste hopper, it often generates friction with the top wall. The other is that the inner wall of the existing deflector chute is a closed structure, and since the side strip will drive the surrounding air flow to move together when it moves, a low-pressure area will be formed in the side area of the movement path of the moving air flow. Therefore, when one side surface of the side strip fits with the inner wall of the closed-structure deflector chute, the low-pressure area formed by the moving air flow on one side surface of the side strip will form an air pressure that further compresses the side strip and the inner wall of the deflector chute, thereby further increasing the friction resistance of the side strip. And in this device, by arranging the long strip-shaped ventilation holes 12, the top wall plate 6 can be formed into an open structure. Even if the side strip fits with the top wall plate 6 under the action of inertia force, the fitting surface of the side strip can drive the air in the long strip-shaped ventilation holes 12, thereby forming an air pressure that reduces the pressure on the other side, and further reducing the side strip friction. The ventilation holes 12 are arranged in a long strip shape in order to promote the fitting surface of the side strip to drive the air flow and avoid the driven air flow being blocked by conventional isolated holes and reducing the flow rate, so that a relatively higher air pressure can be generated on the fitting surface of the side strip.

[0042] In addition, the device is also provided with an internal blowing device, which blows the side strip, separates the side strip from the top wall plate 6, thereby shortening the contact section between the side strip and the top wall plate 6, making the side strip mainly suspended in the air, and thus reducing the running resistance of the side strip. The reason for not directly arranging the internal blowing device at the upstream end of the diversion channel main body 1 but first arranging the ventilation hole 12 is that the gas blown out by the internal blowing device can easily fill the gas in the diversion channel. If the internal blowing device is too close to the upstream end of the diversion channel main body 1, the filled gas will flow out from the gap between the disk cutter and the diversion channel, which will easily drive the side strip here to emerge out of the diversion channel together, which is instead not conducive to reducing the accident of the side strip flying out; in addition, the disk cutter is composed of two butt-jointed disk-shaped upper cutter heads 21 and lower cutter heads 22, and the diversion channel is arranged at the middle seam of the two disk-shaped cutter heads, and the space is very narrow, only facilitating the arrangement of a simple structure such as the ventilation hole 12, and not facilitating the arrangement of a relatively large blowing device.

[0043] Based on the above-mentioned embodiment, in a preferred embodiment, as Figures 1 to 3 shown, the cross-section of the diversion channel main body 1 is a semi-surrounding structure in a C shape, and the side opening of the diversion channel main body 1 faces the side where the strip steel is located. As mentioned above, the gas blown out by the internal blowing device can easily fill the gas in the diversion channel, and then the filled gas may drive the side strip to emerge together from the gap between the disk cutter and the diversion channel. In order to reduce the negative impact of the filled gas, in this embodiment, the diversion channel main body 1 is set as an open structure, which is conducive to gas release and can greatly reduce the outflow of gas from the gap between the disk cutter and the diversion channel. However, because opening holes in the sheet will increase the manufacturing cost, the diversion channel main body 1 in this embodiment omits one wall surface and adopts a semi-surrounding structure in a C shape to achieve openness. And the side opening of the diversion channel main body 1 faces the side where the strip steel is located, which can not only retain the top and bottom two surfaces that mainly play a guiding role but also have a certain purging effect on the passing strip steel, thereby improving the cleanliness of the strip steel.

[0044] Based on the above-mentioned embodiment, in a preferred embodiment, as Figure 4As shown, the shear edge of the strip is projected onto the top wall plate 6 as a shear projection line 16; the first air blowing slit 13 and the shear projection line 16 are in an oblique relationship; the upstream end of the first air blowing slit 13 is close to the side where the strip is located, and the other end of the first air blowing slit 13 is far away from the side where the strip is located. In the above embodiment, since the guide groove body 1 is a C-shaped semi-enclosed structure with one side missing, although this is conducive to gas release, it provides the possibility for the sideband to deviate and escape from the guide groove. In order to prevent the sideband from escaping, in addition to the conventional means of increasing the width of the guide groove, this embodiment also adopts the measure of obliquely placing the first air blowing slit 13. Because the shear projection line 16 is the edge line separating the strip from the sideband, the area on the right side of the shear projection line 16, that is, the inner area 10, is the area where the sideband is scheduled to pass, and the area where the sideband may escape from the guide groove once it deviates is the area on the left side of the shear projection line 16, that is, the outer area 11. After the first blowing slot 13 with the above-mentioned inclined posture is set, from the cross section of the upstream end of an expected side band 25, it can be referred to as Figure 5 For example, the first blowing slit 13 will first blow the left side of the expected sideband 25, thereby causing it to rotate counterclockwise in accordance with the right-hand screw rule, so that the expected sideband 25 forms an inclined windward surface, which will cause the expected sideband 25 to move toward the right side until it re-enters the inner area 10 where it should be running, thereby preventing the sideband from escaping from the opening on the left side of the guide groove body 1. Therefore, this embodiment can satisfy the blowing effect on the sideband and prevent the sideband from escaping from the side opening of the guide groove only by using the same inner blowing device. As the expected edge band 25 continues to move forward, the cross-section also moves continuously therewith. Due to the oblique relationship, the point where the first blowing seam 13 on the cross-section intersects with the expected edge band 25 will continue to move to the right, until the intersection point moves to the right side of the center line of the expected edge band 25, thereby starting to blow the already tilted expected edge band 25 to reset it, thereby preventing the expected edge band 25 from moving excessively to the right and causing scratches on the side wall panel 7.

[0045] Based on the above implementation, in a preferred implementation, Figure 4 As shown, the angle between the first blowing slit 13 and the shear projection line 16 is β, β≤20°. If the angle β is too large, such as close to 90° and roughly vertical, the force on the sideband on the same cross section will be close to balanced, and the above-mentioned torsion effect caused by the airflow blowing on one side of the sideband will be greatly reduced. Therefore, setting a smaller angle is conducive to the generation of torsion. In this embodiment, it is preferred that the angle β is not greater than 20°, so that a better torsion effect can be obtained at the current mainstream strip speed.

[0046] As mentioned above, increasing the width of the guide groove helps prevent the side band from escaping from the guide groove opening. Figure 4As shown, the top wall plate 6 includes two parts, specifically, an inner area 10 and an outer area 11 divided by a shear projection line 16. The inner area 10 is located on the side away from the strip relative to the outer area 11, and is the area where the sideband is scheduled to pass; the outer area 11 is a widened area set to prevent the sideband from slipping out. In addition, in this embodiment, the vent 12 is only provided in the inner area 10, and the first blowing slit 13 is continuously provided in the inner area 10 and the outer area 11. The reason for such a setting is that the gas driven by the sideband after the sideband is attached to the top wall of the closed structure mentioned above will form a low pressure, thereby further improving the degree of attachment between the sideband and the top wall. Because the airflow blown out from the first blowing slit 13 will begin to diverge, and the farther away from the outlet, the higher its divergence. The airflow with high divergence is not easy to blow accurately on one side of the sideband, thereby reducing the effect of the torsional effect mentioned above, and ultimately not conducive to preventing the sideband from slipping out. Without the ventilation holes 12 in the outer area 11, the deflected side band entering the outer area 11 will no longer be subjected to the balancing pressure brought by the ventilation holes 12, thereby improving the fit between the side band and the top wall plate 6 and preventing the air flow from diverging when the side band encounters the first blowing seam 13 due to the large distance between the two.

[0047] Based on the above implementation, in a preferred implementation, Figure 1 , 2 As shown in Figure 6, the inner blower body 2 has a structure with one end large and the other end small; the large end of the inner blower body 2 is located at the downstream end of the strip relative to the small end; the inner blower joint 14 is connected to the large end of the inner blower body 2 through the inner blower interface 20. Because the outer area 11 of the top wall plate 6 is located directly below the strip, the closer to the upstream end of the top wall plate 6, the narrower the space between the top wall plate 6 and the strip. As the inner blower body 2 is a component with a certain volume, how the inner blower body 2 in the outer area 11 can avoid interference with the normally moving strip becomes a problem. In this embodiment, the inner blower body 2 is configured as a wedge-shaped body with a large and small end structure, which conforms to the shape in which the space between the top wall plate 6 and the strip becomes larger from upstream to downstream. By setting the internal blower joint 14 at the large end of the internal blower body 2, the gas consumption demand of the first blowing slit 13 can be met. As the gas is continuously blown out from the first blowing slit 13, the gas consumption becomes smaller and smaller, and the flow cross-section of the inner cavity 19 of the internal blower can become smaller and smaller. This is reflected in the outside of the internal blower body 2, and a large and small end structure can be formed. In this way, the space requirement for the installation of the internal blowing device and the gas consumption demand are met.

[0048] Based on the above implementation, in a preferred implementation, Figure 1As shown, an external blowing device is provided at the downstream end of the top wall plate 6; the external blowing device is suitable for blowing airflow in the downstream direction of the top wall plate 6. As mentioned many times before, the flowing gas will generate low pressure on the side, and the sideband coming out from the downstream end of the guide trough body 1 may be driven by the low-pressure compensating airflow caused by the strip steel, and may even overlap with the strip steel and be entangled in the subsequent process flow, causing product defects or even production accidents. By providing an external blowing device, a low-pressure compensating airflow independent of the strip steel is formed, so that the sideband only moves closer to the airflow blown out by the external blowing device. Once the sideband moves upward over the airflow of the external blowing device, it can be quickly smoothed and reset under the blowing of the airflow to avoid being entangled with the strip steel. In addition, the airflow of the external blowing device will lift the sideband located below it, so that the downstream end of the sideband can maintain a moderately close distance with the downstream end of the first air blowing slot 13, thereby preventing the downstream end of the sideband from being excessively far away from the first air blowing slot 13 due to factors such as gravity, and preventing the sideband from being unable to be twisted and reset by the airflow blown out from the downstream end of the first air blowing slot 13 due to problems such as excessive distance and airflow divergence, thereby preventing the sideband from being severely scratched against the side wall panel 7 due to excessive deviation.

[0049] Based on the above implementation, in a preferred implementation, Figure 1 , 2 As shown in Figures 7 and 8, the external blowing device includes an external blowing device body 4 and an external blowing device gasket 5. The external blowing device body 4 is provided with an external blowing device inner cavity 17, and is connected to the external blowing device joint 15 through an external blowing device interface 18. The external blowing device body 4 is located on the upper surface of the top wall plate 6, and the external blowing device gasket 5 is arranged between the external blowing device body 4 and the top wall plate 6. The external blowing device gasket 5 is as shown in Figure 8. Figure 2 The structure is a semi-enclosed structure in a C shape, wherein the side opening of the outer blower gasket 5, the bottom surface of the outer blower body 4 and the upper surface of the top wall plate 6 jointly form a second air blowing slit 24, and the second air blowing slit 24 faces the downstream direction of the top wall plate 6. The outer blowing device with such a structure utilizes the notch design of the outer blower gasket 5, so that the second air blowing slit 24 can be formed very easily, eliminating the need for laser cutting or wire cutting, which is a more complicated and expensive processing step for the fine slit structure, thereby simplifying the production process and reducing the manufacturing cost.

[0050] Based on the above implementation, in a preferred implementation, Figure 3 As shown, when viewed from the side, the angle between the top wall plate 6 and the moving direction of the strip is α.

[0051]

[0052] Where ρ is the density of the sideband (g / m 3 ), g is the acceleration due to gravity (m / s 2), δ is the thickness of the side strip (mm), w is the width of the side strip (mm), and v is the running speed of the side strip (m / min).

[0053] The running resistance of the side strip is mainly due to the frictional force formed between the side strip moving in a straight line at high speed and the inner wall of the diversion groove when the side strip is guided to turn by the diversion groove. The angle α between the top wall plate 6 and the moving direction of the strip steel is the main angle that determines the side strip being guided to turn by the diversion groove, so it is very important. If the angle is too large, it is easy to cause too large running resistance of the side strip. Through the above empirical formula, the appropriate angle α can be simply and quickly estimated according to factors such as the material type, for example, for steel or aluminum, and the equipment running speed and the self-size of the side strip, etc., so as to provide convenience for equipment design.

[0054] Embodiment 2

[0055] This embodiment provides a circular saw.

[0056] In one embodiment, as Figure 1 shown, it includes a frame 23, circular cutting tools, and the circular saw diversion groove of Embodiment 1. The circular cutting tools are arranged on the frame 23 and include an upper cutter head 21 and a lower cutter head 22, which are suitable for shearing strip steel. The circular saw diversion groove is arranged on the downstream side at the middle seam between the upper cutter head 21 and the lower cutter head 22. Its connecting seat 9 is connected to the frame 23 to support the diversion groove main body 1.

[0057] Obviously, the above embodiments are only examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A disc shear guide groove, characterized in that: include: A connecting seat (9) adapted to be connected to an external frame (23); The guide trough body (1) is suitable for guiding the edge strip cut from the strip steel and is fixedly connected to the connecting seat (9); the guide trough body (1) comprises a top wall plate (6), a side wall plate (7) and a bottom wall plate (8) connected to each other, and the top wall plate (6) is provided with long strip-shaped vent holes (12) arranged side by side; the vent holes (12) are arranged along the length direction of the guide trough body (1); An internal blowing device is suitable for blowing air into the interior of the guide groove body (1); the internal blowing device is located at the downstream end of the strip relative to the vent hole (12); the internal blowing device comprises an internal blowing device body (2), an internal blowing device gasket (3) and a first blowing slit (13); the first blowing slit (13) is provided on the top wall plate (6) and passes through the top wall plate (6), and the width of the first blowing slit (13) is 1 to 2 mm; the internal blowing device body (2) is located on the upper surface of the top wall plate (6) and is connected to the first blowing slit (13), and the internal blowing device gasket (3) is arranged between the internal blowing device body (2) and the top wall plate (6); The cross section of the guide trough body (1) is a C-shaped semi-enclosed structure, and the side opening of the guide trough body (1) faces the side where the strip steel is located; The shear edge of the steel strip is projected onto the top wall plate (6) as a shear projection line (16); the first air blowing slit (13) and the shear projection line (16) are in an oblique relationship; the upstream end of the first air blowing slit (13) is close to the side where the steel strip is located, and the other end of the first air blowing slit (13) is away from the side where the steel strip is located; The top wall plate (6) is divided into an inner area (10) and an outer area (11) by a shear projection line (16), wherein the inner area (10) is located on a side away from the strip relative to the outer area (11); the vent holes (12) are only arranged in the inner area (10), and the first blowing seam (13) is continuously arranged in the inner area (10) and the outer area (11).

2. The disc shear guide groove according to claim 1, characterized in that: The included angle between the first blowing seam (13) and the shear projection line (16) is β, and β is ≤ 20°.

3. The disc shear guide groove according to claim 1, characterized in that: The inner blower body (2) has a structure with one end being large and the other end being small; the large end of the inner blower body (2) is located at the downstream end of the steel strip relative to the small end; and an inner blower joint (14) is provided at the large end of the inner blower body (2).

4. The disc shear guide groove according to claim 1, characterized in that: An external blowing device is provided at the downstream end of the top wall plate (6); the external blowing device is suitable for blowing airflow in the downstream direction of the top wall plate (6).

5. The disc shear guide groove according to claim 4, characterized in that: The external blowing device comprises an external blowing device body (4) and an external blowing device gasket (5); the external blowing device body (4) is located on the upper surface of the top wall plate (6), and the external blowing device gasket (5) is arranged between the external blowing device body (4) and the top wall plate (6); the external blowing device gasket (5) is a C-shaped semi-enclosed structure, and the side opening of the external blowing device gasket (5), the bottom surface of the external blowing device body (4) and the upper surface of the top wall plate (6) jointly form a second blowing slit (24), and the second blowing slit (24) faces the downstream direction of the top wall plate (6).

6. The disc shear guide groove according to any one of claims 1 to 5, characterized in that: When viewed from the side, the angle between the top wall plate (6) and the moving direction of the strip is α. α≤arcsin(59.7 / ρ*g*δ*w*v); Where ρ is the density of the sideband g / m 3 , g is the acceleration due to gravity m / s 2 , δ is the thickness of the sideband (mm), w is the width of the sideband (mm), and v is the running speed of the sideband (m / min).

7. A disc shear, characterized in that: include: Rack (23); A disc cutter, arranged on the frame (23) and suitable for shearing the strip steel; The disc shear guide groove according to any one of claims 1 to 6 is located downstream of the disc cutter; the connecting seat (9) is connected to the frame (23).

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