Strip headless rolling shearing and pressing connecting tools and machine heads

Abstract

The present invention discloses a shearing and pressing connection tool and a machine head for endless rolling of strip steel, belonging to the technical field of metallurgical machinery. The shearing and pressing connection tool includes an upper tool head and a lower tool head. The tool bodies of the upper tool head and the lower tool head are in an anti-symmetric structure, and the front end of the tool body is provided with a cutting edge tip, a main cutting surface, a secondary cutting surface and a step surface. The intersection of the main cutting surface and the secondary cutting surface is the cutting edge tip, and a step surface parallel to the strip steel is arranged on one side of the main cutting surface away from the cutting edge tip; the main cutting surface of the upper tool head is integrally provided with a plurality of upper convex teeth arranged at intervals in its length direction, and the main cutting surface of the lower tool head is integrally provided with a plurality of lower convex teeth arranged at intervals in its length direction, and the plurality of upper convex teeth and the plurality of lower convex teeth are misaligned and clamped with each other two by two. The present invention realizes the shearing and pressing connection work of the head and tail overlapping two strip steels in the endless rolling hot strip production line to perform the actions of cutting the head, pressing and cutting the tail in one-time and continuously.

Description

Technical Field

[0001] The present invention belongs to the technical field of metallurgical machinery, and particularly relates to a shearing and pressing connection tool and a head for endless rolling of strip steel. Background Art

[0002] In a normal hot-rolled strip steel production line, generally, each steel plate to be rolled needs to be heated, roughly rolled, and then finely rolled to process a hot-rolled coil with the required thickness. In such a rolling method, especially in the fine rolling process, there are problems that products with a strip steel thickness of 0.8 - 1.5 mm cannot be rolled, or the production line is likely to stop due to poor biting of the material to be rolled, and the qualification rate is greatly reduced due to poor shapes of the front and rear ends of the material to be rolled. Recently, in order to eliminate such problems and further improve production capacity, a pre-joining rolling method has been adopted. In this method, on the conveyor line at the input end of a hot-rolling finishing mill, the rear end of the previously conveyed hot steel plate and the front end of the subsequent steel plate are pre-joined, and then they are continuously conveyed to the hot-rolling finishing production line.

[0003] For conventional endless hot-rolled strip steel, the design, manufacture, and use of independent intellectual property rights for the intermediate billet connection equipment between domestic roughing mills and finishing mills are still blank; several patented technology equipment from abroad, such as those of Japan and Primetals, are in application. However, the pressing connection of the intermediate billet in endless rolling is a special equipment and cannot shear the head and tail separately at the same time. To transform existing conventional hot rolling into endless rolling, many equipments need to be relocated, transformed, and newly built. There are more than 100 conventional hot-rolling production lines in China, and their use is severely restricted; at the same time, the cost of introducing only one pressing connection equipment is more than 100 million yuan, which is extremely expensive.

[0004] It is very necessary to further explore the shearing and pressing connection technology of the intermediate billet in endless rolling to meet the production smoothness requirements of endless rolling. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a shearing and pressing connection tool and a head for endless rolling of strip steel to solve the shearing and pressing connection problem of the one-time coherent cutting of the head, pressing connection, and cutting of the tail in an endless rolling hot-rolled strip steel production line.

[0006] The present invention is realized through the following technical solutions:

[0007] A shearing and pressing connection tool for endless rolling of strip steel provided by the present invention includes an upper cutter head and a lower cutter head, which are used to realize the shearing and pressing connection of two strip steels with overlapping heads and tails. The cutter bodies of the upper cutter head and the lower cutter head are in an anti-symmetric structure, and the front end of the cutter body is provided with a cutting edge tip, a main cutting surface, a secondary cutting surface and a step surface. The intersection of the main cutting surface and the secondary cutting surface is the cutting edge tip, and a step surface parallel to the strip steel is arranged on the side of the main cutting surface far from the cutting edge tip; the main cutting surface of the upper cutter head is integrally provided with a plurality of upper convex teeth spaced at intervals in its length direction, the main cutting surface of the lower cutter head is integrally provided with a plurality of lower convex teeth spaced at intervals in its length direction, and the plurality of upper convex teeth and the plurality of lower convex teeth are misaligned and clamped with each other two by two.

[0008] Further, the angles α and β between the main cutting surface and the secondary cutting surface and the horizontal plane respectively satisfy the following relationship: 15° ≤ α ≤ 80°, 15° ≤ β ≤ 80°.

[0009] Further, the vertical projection of the cutting edge tip of the upper cutter head is on the step surface of the lower cutter head, and the vertical projection of the cutting edge tip of the lower cutter head is on the step surface of the upper cutter head, and the projection area of the cutting edge tip on the step surface does not exceed one-half of the step surface.

[0010] Further, the tooth profile cross-section of the upper convex teeth and the lower convex teeth is one or more combinations of triangle, rectangle, trapezoid, arc or polygon.

[0011] Further, the number of the upper convex teeth and the lower convex teeth is determined according to the length of the main cutting surface and the width of the strip steel, and the height is determined according to the inclination angle of the main cutting surface and the thickness of the strip steel.

[0012] Further, draft tapers are provided on both sides of the upper convex teeth or the lower convex teeth perpendicular to the main cutting surface.

[0013] The present invention also provides a shearing and pressing connection head for endless rolling of strip steel, which includes an upper head and a lower head, and adopts the above-mentioned shearing and pressing connection tool for endless rolling of strip steel. The upper head is provided with at most two upper cutter heads, and a pressing block for fixing it to the upper head is arranged on the side of the upper cutter head close to its step surface; the lower head is provided with at most two lower cutter heads, and the pressing block for fixing it to the lower head is arranged on the side of the lower cutter head close to its step surface; a pressing head is arranged on the pressing block, and the corresponding surface of the pressing head facing the strip steel is flush with the step surface of the cutter body.

[0014] Further, the corresponding surface of the pressing head facing the strip steel is used to replace the step surface of the cutter body, and the cutting edge tips of the upper cutter head and the lower cutter head are respectively vertically projected on the corresponding surfaces of the pressing heads of the lower head and the upper head.

[0015] Further, the corresponding surface of the pressing head is set as an arc surface.

[0016] The advantages of the present invention are as follows:

[0017] 1. The shearing and pressing connection tool of the present invention realizes the shearing of the heads and tails of two overlapping strip steels in a headless rolling hot strip production line and the pressing connection at the overlapping part, has a simple structure and high reliability, filling the technical gaps at home and abroad.

[0018] 2. By successively performing the operations of cutting the head of the subsequent strip steel, pressing the overlapping strip steels, and cutting the tail of the preceding strip steel, the shearing and pressing connection tool of the present invention can adapt to the same or different thicknesses of the preceding strip steel and the subsequent strip steel, as well as the same or different materials of the two.

[0019] Other advantages, objectives and features of the present invention will be described to some extent in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the drawings, where:

[0021] Figure 1 is a front structural schematic diagram of the shearing and pressing connection tool for headless rolling of strip steel;

[0022] Figure 2 is a structural schematic diagram of the upper tool head; a is a front view, b is a right side view, c is a view in the direction A (rectangular tooth type);

[0023] Figure 3 is a structural schematic diagram of the lower tool head; a is a front view, b is a left side view, c is a view in the direction B (rectangular tooth type);

[0024] Figure 4 is a structural schematic diagram of a trapezoidal tooth type; a is a view in the direction A of the upper convex tooth, b is a view in the direction B of the lower convex tooth;

[0025] Figure 5 is a structural schematic diagram of other tooth types; a is an arc, b is a short triangle, c is a long triangle, d is a polygon;

[0026] Figure 6 is a front structural schematic diagram of the shearing and pressing connection machine head for headless rolling of strip steel;

[0027] The marks in the figure are: upper tool head 1, lower tool head 2, cutting edge tip 3, secondary cutting edge surface 4, main cutting edge surface 5, step surface 6, upper convex tooth 7, lower convex tooth 8, upper machine head 9, lower machine head 10, pressing block 11, pressing head 12. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0029] Embodiment 1:

[0030] like Figures 1-3 As shown, the headless rolling shearing and pressing connecting tool for strip steel in this embodiment is used to realize the shearing and pressing connection of two overlapping strip steel pieces, including an upper cutter head 1 and a lower cutter head 2. The cutter bodies of the upper cutter head 1 and the lower cutter head 2 are in an anti-symmetric structure, and the front ends of the cutter bodies are provided with a cutting tip 3, an auxiliary cutting surface 4, a main cutting surface 5 and a step surface 6. The intersection of the main cutting surface 5 and the auxiliary cutting surface 4 is the cutting tip 3, and a step surface 6 parallel to the strip steel is provided on the side of the main cutting surface 5 away from the cutting tip 3; the main cutting surface 5 of the upper cutter head 1 is provided with a plurality of upper convex teeth 7 which are integral with it and arranged at intervals in its length direction, and the main cutting surface 5 of the lower cutter head 2 is provided with a plurality of lower convex teeth 8 which are integral with it and arranged at intervals in its length direction, and the plurality of upper convex teeth 7 and the plurality of lower convex teeth 8 are staggered and clamped in pairs, and the tooth cross-sectional structure of the upper convex teeth and the lower convex teeth is rectangular. By adopting the above scheme, after the strip is heated and rough-rolled on the hot rolling production line and before the finish rolling, the continuously rolled leading strip and subsequent strip are overlapped at the head and tail and placed in the shearing and pressing connecting tool. When the upper cutter head and the lower cutter head move relative to each other, the blade tip of the lower cutter head first shears the head of the subsequent strip. Then, the lower convex teeth of the lower cutter head and the upper convex teeth of the upper cutter head are staggered and engaged with each other to crimp the two strips at the overlapping part. Then, the blade tip of the upper cutter head shears the tail of the leading strip. Finally, the leading strip and the subsequent strip are crimped on their respective main cutting surface sides, and the thickness after crimping is ensured to be close to that of a single strip. At the same time, the excess heads and tails of each strip are sheared off by the blade tip under the resistance of the step surface, and then collected by the scraper head and tail scraper device and the scrap steel collection device respectively. The shearing and pressing connecting tool can be adapted to situations where the plate thicknesses of the preceding steel strip and the succeeding steel strip are consistent or different, and where the materials of the two are consistent or different.

[0031] In this embodiment, the angles α and β between the main cutting surface 5 and the secondary cutting surface 4 and the horizontal plane respectively satisfy the following relationship: 15°≤α≤80°, 15°≤β≤80°, which can meet the use conditions.

[0032] In this embodiment, the cutting tip 3 of the upper cutter head 1 is vertically projected onto the stepped surface 6 of the lower cutter head 2, and the cutting tip 3 of the lower cutter head 2 is vertically projected onto the stepped surface 6 of the upper cutter head 1. In this way, when the cutting tip shears the strip steel, the opposite stepped surfaces can form an effective abutting support for the strip steel, facilitating the effective shearing of the cutting tip. Preferably, the projection area of the cutting tip 3 on the stepped surface 6 does not exceed half of the stepped surface, so that the effective working surface of the stepped surface is large enough to form a favorable support for the strip steel.

[0033] As Figure 4 、 5 shown, the tooth profile cross-sections of the upper convex teeth 7 and the lower convex teeth 8 can also be one or a combination of a triangle, a trapezoid, an arc, or a polygon.

[0034] In this embodiment, the number of teeth of the upper convex teeth 7 and the lower convex teeth 8 is determined according to the length of the main cutting surface 5 and the width of the strip steel, and the height is determined according to the inclination angle of the main cutting surface 5 and the thickness of the strip steel, so as to enable it to meet the combined work of shearing and pressing the overlapping strip steel.

[0035] In this embodiment, the upper convex teeth 7 or the lower convex teeth 8 are provided with a draft taper (not shown) on both sides perpendicular to the main cutting surface 5. Through the design of the draft taper, the upper convex teeth and the lower convex teeth can be easily separated after pressing the overlapping strip steel, reducing the adhesion of the strip steel to the upper cutter head and the lower cutter head, resulting in production accidents and affecting the smooth progress of production.

[0036] As Figure 6 shown, the shearing and pressing connection head formed by this strip steel endless rolling shearing and pressing connection tool includes an upper head 9 and a lower head 10. An upper cutter head 1 is installed on the upper head 9, and a lower cutter head 2 is installed on the lower head 10. And the upper cutter head 1 and the lower cutter head 2 are provided with pressing blocks 11 for fixing them on the sides close to the stepped surfaces. That is, the upper cutter head is installed on the upper head and the lower cutter head is installed on the lower head through the pressing blocks of the clamping mechanism composed of a hydraulic cylinder, a spring, a pull rod, and an inclined block, etc. And the pressing block 11 is provided with a pressing head 12, and the corresponding surface of the pressing head facing the strip steel is flush with the stepped surface of the tool body, which can further increase the abutting area of the opposite side of the cutting tip against the strip steel and facilitate the cutting of the cutting tip.

[0037] Of course, in different embodiments, two evenly distributed upper cutter heads and lower cutter heads can be provided on the upper head and the lower head respectively. In this way, during the rotation process, by rotating two half turns, two shearing and pressing operations can be realized, improving the work efficiency and reducing the maintenance work of the shearing and pressing connection tool.

[0038] Embodiment 2:

[0039] As Figure 6As shown in the figure, the difference between this embodiment and the first embodiment lies in that: no stepped surface is provided on the tool bodies of the upper and lower cutter heads of the shearing and pressing connection tool. Instead, the support for the strip steel is realized by the pressing head 12 of the pressing block 11 on the shearing and pressing connection machine head, that is, the cutting edges 3 of the upper cutter head 1 and the lower cutter head 2 are respectively vertically projected onto the corresponding surfaces of the pressing heads 12 of the upper machine head 9 and the lower machine head 10. In this way, the manufacturing of the upper and lower cutter heads can be facilitated.

[0040] The corresponding surface of the pressing head 12 in this embodiment is set as an arc surface. On the one hand, it can prevent the pressing block from leaving indentations on the strip steel when it abuts against the strip steel. On the other hand, it is convenient for the strip steel after pressing not to interfere during the rotation of the upper and lower machine heads.

[0041] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and its equivalent technologies, the present invention also intends to include these changes and modifications.

Claims

1. A strip steel headless rolling shearing and pressing connecting tool, comprising an upper cutter head (1) and a lower cutter head (2), characterized in that: For realizing the shearing and pressing connection of two strips of steel with overlapping heads and tails, the tool bodies of the upper cutting head and the lower cutting head are of antisymmetric structure, and the front end of the tool body is provided with a cutting edge tip (3), a secondary cutting surface (4), a main cutting surface (5) and a stepped surface (6). The intersection of the main cutting surface and the secondary cutting surface is the cutting edge tip, and a stepped surface parallel to the strip of steel is arranged on the side of the main cutting surface away from the cutting edge tip; on the main cutting surface of the upper cutting head, there are multiple upper convex teeth (7) integrally formed therewith and arranged at intervals in its length direction, on the main cutting surface of the lower cutting head, there are multiple lower convex teeth (8) integrally formed therewith and arranged at intervals in its length direction, and the multiple upper convex teeth and the multiple lower convex teeth are engaged with each other in a staggered manner in pairs; The cutting edge tip of the upper cutting head is vertically projected onto the stepped surface of the lower cutting head, and the cutting edge tip of the lower cutting head is vertically projected onto the stepped surface of the upper cutting head, and the projection area of the cutting edge tip on the stepped surface does not exceed one-half of the stepped surface; The upper convex teeth or the lower convex teeth are provided with draft angles on both sides perpendicular to the main cutting surface.

2. The strip headless rolling shearing and pressing connecting tool according to claim 1, characterized in that: The angles α and β between the main cutting surface and the secondary cutting surface and the horizontal plane respectively satisfy the following relationship: 15° ≤ α ≤ 80°, 15° ≤ β ≤ 80°.

3. The strip headless rolling shearing and pressing connecting tool according to claim 1, characterized in that: The tooth profiles of the upper convex teeth and the lower convex teeth are one or a combination of more than one of triangle, rectangle, trapezoid, arc or polygon.

4. The strip headless rolling shearing and pressing connecting tool according to claim 1, characterized in that: The number of teeth of the upper convex teeth and the lower convex teeth is determined according to the length of the main cutting surface and the width of the strip of steel, and the height is determined according to the inclination angle of the main cutting surface and the thickness of the strip of steel.

5. The shearing and pressing connection head for endless rolling of strip steel includes an upper head (9) and a lower head (10), and is characterized in that, Adopting the strip of steel endless rolling shearing and pressing connection tool according to any one of claims 1-4, the upper machine head is provided with at most two upper cutting heads, and a pressing block (11) for fixing it to the upper machine head is arranged on the side of the upper cutting head close to its stepped surface; the lower machine head is provided with at most two lower cutting heads, and the pressing block for fixing it to the lower machine head is arranged on the side of the lower cutting head close to its stepped surface; a pressing head (12) is arranged on the pressing block, and the corresponding surface of the pressing head facing the strip of steel is flush with the stepped surface of the tool body.

6. The head for shear-compression connection in endless hot strip rolling according to claim 5, characterized in that, Using the corresponding surface of the pressing head facing the strip of steel to replace the stepped surface of the tool body, and the cutting edge tips of the upper cutting head and the lower cutting head are respectively vertically projected onto the corresponding surfaces of the pressing heads of the lower machine head and the upper machine head.

7. The head of the endless rolling shearing and pressing connection for strip steel according to claim 5 or 6, characterized in that The corresponding surface of the pressing head is set as an arc surface.

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