Korean standard D29mm bamboo joint steel two-slitting rolling pass system

Abstract

The utility model discloses a Korean standard D29mm bamboo joint steel two-slitting rolling pass system which comprises a round-entering flat roll pass K6, a round-entering flat roll pass K7, a round-entering flat roll pass K8, a round-entering flat roll pass K8, a round-entering flat roll pass K8 and a round-entering flat roll pass K8, the box hole pattern K5 is arranged in a one-hole manner; the pre-segmentation hole pattern K4 is provided with two holes; the slitting hole pattern K3 is arranged with two holes; and the round feeding convex roller hole pattern K2 is arranged in a hole-free manner. The double-slitting rolling device has the advantages that double-slitting rolling of Korean standard D29 mm is achieved for the first time, the hourly yield can be greatly improved, in addition, compared with a round-feeding flat oval hole type and a round-feeding convex roller, on one hand, on the premise that the same sectional area is kept, the deformation quantity is smaller, the two hole types and material types are the same in height, and the width convex roller is smaller than a flat oval roller, so that the broadening is smaller, and the production efficiency is improved. The load and current required by the rolling mill are smaller, so that the rolling speed can be increased; and on the other hand, the width of the round feeding convex roller and the material shape is smaller, the width change of the material entering the rear rack is facilitated, the work of the rear rack is reduced, and the fullness of the finished hole shape is better facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of bamboo steel cutting and rolling, in particular to a Korean standard D29mm bamboo steel two-cut rolling pass system. Background Art

[0002] Slit rolling refers to a rolling process that uses special roll pass and guide devices on a steel rolling mill to cut a rolled piece into two (or more) rolled pieces along the longitudinal direction, and then roll out two (or more) finished rolled products. During the rolling process, the steel billet is rolled into two (or more) parallel pieces with the same cross-sectional shape through the pass design, and then the billet is cut into rolled pieces with the same cross-sectional shape along the longitudinal direction by the slitting equipment, and the rolling is continued until the finished product is obtained.

[0003] The domestic steel industry is subject to national capacity restrictions and market profits are declining. The export steel business of various companies will increase in the future. In order to meet customer needs and reduce production costs, various companies will reduce the shared costs by increasing production capacity and improving indicators. D29mm Korean standard bamboo steel, there is no product of the same size in China, and the surface size requirements are different, so the hole type needs to be redesigned. Utility Model Content

[0004] The purpose of the utility model is to provide a Korean standard D29mm bamboo steel two-cut rolling hole system, which realizes the Korean standard D29mm two-cut rolling for the first time, and at the same time, the width of the material through the circular convex roller hole is smaller, which is conducive to the width change of entering the rear frame, reducing the work done by the rear frame, and is more conducive to the fullness of the finished product hole, which can greatly increase the hourly output.

[0005] The above technical objectives of the utility model are achieved through the following technical solutions:

[0006] A Korean standard D29mm bamboo steel two-cut rolling pass system, characterized by comprising the following distributed in sequence:

[0007] The hole type of the round flat roller K6 is a hole-free setting;

[0008] Box hole type K5, which is a one-hole setting;

[0009] Pre-cut hole type K4, which is a two-hole setting;

[0010] Cutting hole type K3, which is a two-hole setting;

[0011] The circular feed convex roller hole type K2 is a hole-free setting.

[0012] Preferably, the hole height of the round flat roller hole K6 is 38 mm, the hole bottom width is 69.26 mm, and the slot width is 79 mm.

[0013] Preferably, the groove bottom height of the box hole type K5 is 48.96 mm, the groove bottom width is 38.76 mm, the groove mouth width is 69.36 mm, and the roller gap is 12.24.

[0014] Preferably, the fillet radius of the slot opening of the box hole type K5 is the same as the fillet radius of the slot bottom, both of which are 7.14 mm.

[0015] Preferably, the pre-cutting hole K4 is dumbbell-shaped, with a hole height of 39.78 mm, a center distance between the two circles of the dumbbell shape of 40.5 mm, a slot width of 78.82 mm, a slot corner radius of 6.12 mm, a wedge tip arc radius of 5.1 mm, a cutting wheel angle of 80 degrees, a radius of the two circles of the dumbbell shape of 16.32 mm, a roller gap of 4.59 mm, and a wedge top spacing of 16.32 mm.

[0016] Preferably, the cutting hole K3 is also dumbbell-shaped, with a hole height of 37.74 mm, a center distance between the two circles of the dumbbell shape of 40.34 mm, a slot width of 80.68 mm, a slot corner radius of 6.12 mm, a wedge tip arc radius of 1.22 mm, a cutting wheel angle of 56 degrees, a radius of the two circles of the dumbbell shape of 16.32 mm, a roller gap of 5.1 mm, and a wedge top spacing of 1.51 mm.

[0017] Preferably, the hole height of the circular feed convex roller hole K2 is 22 mm, the hole bottom width is 34.91 mm, and the slot width is 41.26 mm.

[0018] Preferably, arc protrusions are provided at the upper and lower middle parts of the circular feed convex roller hole profile K2, the radius of the arc protrusions is 9.28 mm, and the fillet radius of the connecting notch of the arc protrusions is 5.5 mm.

[0019] In summary, the beneficial effects of the utility model are: the two-section rolling of Korean standard D29mm is realized for the first time, which can greatly improve the hourly output. In addition, compared with the round-entry flat elliptical hole type, the round-entry convex roller has less deformation on the premise of maintaining the same cross-sectional area. The above two hole types have the same material height, and the width convex roller is smaller than the flat elliptical roller, so the width is smaller, the load and current required by the rolling mill are smaller, which is more conducive to the improvement of rolling speed. Since the speed = line speed / (maximum roller diameter-average hole height) / π*speed ratio, where the speed ratio and the maximum roller diameter are constants, if the line speed is the same, the average hole height convex roller is negative, so the speed is smaller and the motor load is smaller; on the other hand, the round-entry convex roller has a smaller width of the material, which is conducive to the width change of entering the rear frame, reducing the work done by the rear frame, and is more conducive to the fullness of the finished hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 This is a schematic diagram of the structure of the hole type K6 of the circular flattening roller of the utility model;

[0022] Figure 2 It is a structural schematic diagram of the middle box hole type K5 of the utility model.

[0023] Figure 3 This is a schematic diagram of the structure of the pre-cut hole type K4 in the utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the cutting hole type K3 in the utility model;

[0025] Figure 5 It is a structural schematic diagram of the hole type K2 of the circular feed convex roller in the utility model. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] In the description of the present utility model, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] like Figures 1 to 5 The Korean standard D29mm bamboo steel two-cut rolling pass system shown includes the following distributed in sequence:

[0029] The hole type of the round flat roller K6 is a hole-free setting;

[0030] Box hole type K5, which is a one-hole setting;

[0031] Pre-cut hole type K4, which is a two-hole setting;

[0032] Cutting hole type K3, which is a two-hole setting;

[0033] The circular feed convex roller hole type K2 is a hole-free setting.

[0034] The hole height of the round flat roller hole K6 is 38mm, the hole bottom width is 69.26mm, and the slot width is 79mm.

[0035] The groove bottom height of box hole type K5 is 48.96mm, the groove bottom width is 38.76mm, the groove mouth width is 69.36mm, and the roller gap is 12.24.

[0036] The fillet radius of the slot opening of box hole type K5 is the same as the fillet radius of the slot bottom, both of which are 7.14 mm.

[0037] The pre-cutting hole type K4 is dumbbell-shaped, with a hole height of 39.78mm, a center distance between the two circles of the dumbbell shape of 40.5mm, a slot width of 78.82mm, a slot corner radius of 6.12mm, a wedge tip arc radius of 5.1mm, a cutting wheel angle of 80 degrees, a radius of the two circles of the dumbbell shape of 16.32mm, a roller gap of 4.59mm, and a wedge top spacing of 16.32mm.

[0038] The cutting hole type K3 is also dumbbell-shaped, with a hole height of 37.74mm, a center distance between the two circles of the dumbbell shape of 40.34mm, a slot width of 80.68mm, a slot corner radius of 6.12mm, a wedge tip arc radius of 1.22mm, a cutting wheel angle of 56 degrees, a radius of the two circles of the dumbbell shape of 16.32mm, a roller gap of 5.1mm, and a wedge top spacing of 1.51mm.

[0039] The hole height of the circular feed convex roller hole K2 is 22mm, the hole groove bottom width is 34.91mm, and the groove width is 41.26mm.

[0040] Arc protrusions are provided in the upper and lower middle parts of the circular feed convex roller hole K2, the radius of the arc protrusion is 9.28mm, and the radius of the connecting groove of the arc protrusion is 5.5mm.

[0041] The utility model has the advantage that it realizes the two-section rolling of Korean standard D29mm for the first time, which can greatly improve the hourly output. In addition, compared with the round-entry flat elliptical hole type, the round-entry convex roller has less deformation while maintaining the same cross-sectional area. The above two hole types have the same material height, and the width convex roller is smaller than the flat elliptical roller, so the width is smaller, the load and current required by the rolling mill are smaller, which is more conducive to the improvement of rolling speed. Since the speed = line speed / (maximum roller diameter-average hole height) / π*speed ratio, where the speed ratio and maximum roller diameter are fixed values, if the line speed is the same, the average hole height convex roller is negative, so the speed is smaller and the motor load is smaller; on the other hand, the round-entry convex roller has a smaller width of the material, which is conducive to the width change of entering the rear frame, reducing the work done by the rear frame, and is more conducive to the fullness of the finished hole.

[0042] The embodiments described above are merely descriptions of preferred implementation modes of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineering and technical personnel in the field should fall within the protection scope of the present invention. The technical contents for which protection is sought in the present invention have been fully recorded in the technical requirements.

Claims

1. A Korean standard D29mm bamboo steel two-cut rolling pass system, characterized in that: Includes the following distributed in order: The hole type of the round flat roller K6 is a hole-free setting; Box hole type K5, which is a one-hole setting; Pre-cut hole type K4, which is a two-hole setting; Cutting hole type K3, which is a two-hole setting; The circular feed convex roller hole type K2 is a hole-free setting.

2. A Korean standard D29mm bamboo steel two-cut rolling pass system according to claim 1, characterized in that: The hole profile K6 of the round flattening roller has a hole profile height of 38 mm, a hole profile groove bottom width of 69.26 mm, and a groove opening width of 79 mm.

3. A Korean standard D29mm bamboo steel two-cut rolling pass system according to claim 1, characterized in that: The groove bottom height of the box hole type K5 is 48.96 mm, the groove bottom width is 38.76 mm, the groove mouth width is 69.36 mm, and the roller gap is 12.

24.

4. A Korean standard D29mm bamboo steel two-cut rolling pass system according to claim 3, characterized in that: The fillet radius of the slot opening of the box hole type K5 is the same as the fillet radius of the slot bottom, both of which are 7.14 mm.

5. The Korean standard D29mm bamboo steel two-cut rolling pass system according to claim 1, characterized in that: The pre-cutting hole K4 is dumbbell-shaped, with a hole height of 39.78mm, a center distance between the two circles of the dumbbell shape of 40.5mm, a slot width of 78.82mm, a slot corner radius of 6.12mm, a wedge tip arc radius of 5.1mm, a cutting wheel angle of 80 degrees, a radius of the two circles of the dumbbell shape of 16.32mm, a roller gap of 4.59mm, and a wedge top spacing of 16.32mm.

6. A Korean standard D29mm bamboo steel two-cut rolling pass system according to claim 1, characterized in that: The cutting hole K3 is also dumbbell-shaped, with a hole height of 37.74mm, a center distance between the two circles of the dumbbell shape of 40.34mm, a slot width of 80.68mm, a slot corner radius of 6.12mm, a wedge tip arc radius of 1.22mm, a cutting wheel angle of 56 degrees, a radius of the two circles of the dumbbell shape of 16.32mm, a roller gap of 5.1mm, and a wedge top spacing of 1.51mm.

7. The Korean standard D29mm bamboo steel two-cut rolling pass system according to claim 1, characterized in that: The hole profile K2 of the circular feed convex roller has a hole profile height of 22 mm, a hole profile groove bottom width of 34.91 mm, and a groove opening width of 41.26 mm.

8. A Korean standard D29mm bamboo steel two-cut rolling pass system according to claim 7, characterized in that: Arc protrusions are arranged at the upper and lower middle parts of the circular feed convex roller hole K2, the radius of the arc protrusions is 9.28 mm, and the radius of the connecting notch of the arc protrusions is 5.5 mm.

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