Korean standard D19mm bamboo joint steel three-slitting rolling pass system

Abstract

The utility model relates to a Korean standard D19mm bamboo joint steel three-slitting rolling pass system, which relates to the technical field of rolling passes, and comprises a middle rolling pass and a finish rolling pass which are sequentially distributed, the finish rolling pass comprises a first flat roll pass K6, a first box pass K5, a pre-slitting pass K4, a slitting pass K3, a second flat roll pass K2 and a finished pass K1 which are sequentially distributed, and the first box pass K5, the pre-slitting pass K4, the slitting pass K3, the second flat roll pass K2 and the finished pass K1 are sequentially distributed. The pre-splitting hole pattern K4 and the splitting hole pattern K3 are arranged in a three-hole mode, the second flat roll hole pattern K2 is arranged in a hole-free mode, the groove bottom height of the second flat roll hole pattern K2 is 12 mm, and the total width of the second flat roll hole pattern K2 is 29.6 mm. The method has the effects of improving the production quality of the Korean standard bamboo joint steel and reducing the defective rate of the Korean standard bamboo joint steel.

Description

Technical Field

[0001] The utility model relates to the technical field of rolling pass, in particular to a Korean standard D19mm bamboo steel three-section rolling pass system. Background Art

[0002] At present, with the expansion of the steel export market, Korean standard bamboo steel is one of the main products of steel export. Korean standard bamboo steel is a steel bar that is hot-rolled and naturally cooled, and its circumferential surface usually has two longitudinal ribs and evenly distributed transverse ribs along the length direction.

[0003] The Chinese patent with the authorization announcement number CN220387458U in the related technology provides a four-section rolling hole system of Korean standard Φ13mm threaded steel, which includes the first flat roller hole K7 distributed in sequence, which is a hole-free setting; the second flat roller hole K6, which is a hole-free setting; the box hole K5, which is a one-hole setting; the pre-cut hole K4, which is a four-hole setting; the cutting hole K3, which is a four-hole setting; the elliptical hole K2, which is a one-hole setting; the finished hole K1, which is a one-hole setting; the finished hole K1 is provided with a bamboo rib groove. Two flat roller hole shaped pressings are adopted, and the box-shaped hole squeezes the material shape to the middle, so that the material shape of the subsequent cutting is uniform. The pre-cutting and cutting two passes cut the material shape, and the elliptical and finished hole shaped are the final forming passes. Through the complete hole shaped system and the special hole shaped size structure, the output of Korean standard Φ13mm threaded steel is increased.

[0004] In the process of implementing this application, the inventors found that there are at least the following problems in this technology: Since the Korean standard bamboo joint steel has a higher requirement on the average height of the transverse ribs, it is necessary to strictly ensure the height of the transverse ribs at 1 / 4 and 3 / 4, and the Korean standard bamboo joint steel produced by the elliptical hole type K2 has a low degree of fullness of the transverse ribs at 1 / 4, resulting in a low pass rate of the Korean standard bamboo joint steel. Utility Model Content

[0005] In order to improve the production quality of Korean standard bamboo steel and reduce the defective rate of Korean standard bamboo steel, the present application provides a Korean standard D19mm bamboo steel three-section rolling hole system.

[0006] The present application provides a Korean standard D19mm bamboo steel three-section rolling pass system adopts the following technical solution:

[0007] A Korean standard D19mm bamboo steel three-section rolling pass system, including intermediate rolling passes and finishing rolling passes distributed in sequence, the finishing rolling passes including a first flat roller pass K6, a first box pass K5, a pre-cutting pass K4, a cutting pass K3, a second flat roller pass K2 and a finished pass K1 distributed in sequence, the pre-cutting pass K4 and the cutting pass K3 are both three-hole settings, the second flat roller pass K2 is a hole-free setting, the groove bottom height of the second flat roller pass K2 is 12 mm, and the total width of the second flat roller pass K2 is 29.6 mm.

[0008] By adopting the above technical scheme, the rolled piece enters the finishing pass after the intermediate rolling pass. In the finishing pass, the rolled piece passes through the first flat roller hole profile K6, the first box hole profile K5, the pre-cutting hole profile K4, the cutting hole profile K3, the second flat roller hole profile K2 and the finished hole profile K1 in sequence, and then the finished steel is output. Under the premise of maintaining the same cross-sectional area, when the material height of the second flat roller hole profile K2 is the same as that of other hole profiles, the width of the second flat roller hole profile K2 is smaller, so the width of the second flat roller hole profile K2 is smaller, so that the deformation of the rolled piece is less, which facilitates metal deformation and improves the fullness of the transverse ribs of the Korean standard bamboo steel, thereby achieving the effect of improving the production quality of the Korean standard bamboo steel and reducing the defective rate of the Korean standard bamboo steel.

[0009] Preferably, the first flat roller hole profile K6 is a hole-free setting, the groove bottom height of the first flat roller hole profile K6 is 24.5 mm, and the total width of the first flat roller hole profile K6 is 74 mm.

[0010] By adopting the above technical scheme, before the workpiece enters the first box hole type K5, the workpiece is pressed down by the first flat roller hole type K6, so that the workpiece can be rolled along the width direction, thereby making the deformation of the workpiece uniform, reducing the head bending phenomenon of the workpiece, and improving the rolling accuracy of Korean standard bamboo steel.

[0011] Preferably, the first box hole type K5 is a one-hole arrangement, the bottom height of the first box hole type K5 is 64 mm, and the total width of the first box hole type K5 is 24 mm.

[0012] By adopting the above technical solution, before the rolled piece enters the pre-slitting hole K4, the rolled piece passes through the first box hole K5 so that the shape of the rolled piece is squeezed toward the middle, thereby improving the uniformity of the subsequent slitting shape.

[0013] Preferably, the groove bottom height of the pre-cutting hole type K4 is 24.68mm, the wedge top arc radius of the pre-cutting hole type K4 is 2.1mm, the groove bottom radius of the pre-cutting hole type K4 is 12.28mm, the wedge top spacing of the pre-cutting hole type K4 is 25.73mm, and the center spacing of the pre-cutting hole type K4 is 78.06mm.

[0014] By adopting the above technical solution, before the rolled piece enters the cutting hole K3, the rolled piece passes through the pre-cutting hole K4 to form a three-cut material shape, thereby facilitating the subsequent three-cutting of the rolled piece.

[0015] Preferably, the groove bottom height of the cutting hole type K3 is 23.63 mm, the wedge top arc radius of the cutting hole type K3 is 0.94 mm, the groove bottom radius of the cutting hole type K3 is 11.06 mm, the wedge top spacing of the cutting hole type K3 is 26.04 mm, and the center spacing of the cutting hole type K3 is 79.14 mm.

[0016] By adopting the above technical solution, the rolled piece is cut into three parts through the pre-cutting hole type K4, thereby improving the production efficiency of Korean standard bamboo steel.

[0017] Preferably, the bottom height of the finished hole profile K1 is 18.5 mm.

[0018] By adopting the above technical solution, the rolled piece passes through the finished hole type K1 to form Korean standard bamboo steel.

[0019] Preferably, the intermediate rolling pass includes a first elliptical hole type K12, a first circular hole type K11, a second elliptical hole type K10, a second circular hole type K9, a third flat roll hole type K8 and a second box hole type K7 which are distributed in sequence.

[0020] By adopting the above technical solution, the rolled piece runs smoothly and is easy to control in the intermediate rolling pass, thereby improving the stability and rolling accuracy of the Korean standard bamboo steel rolling production.

[0021] Preferably, the first elliptical hole type K12, the first circular hole type K11, the second elliptical hole type K10, the second circular hole type K9 and the second box hole type K7 are all set with one hole, and the third flat roller hole type K8 is set without a hole.

[0022] By adopting the above technical scheme, the rolled piece is formed into a circular rolled piece after passing through the second circular hole type K9, and then the circular rolled piece is processed into a flat rolled piece through the flat third flat roller hole type K8, and then the flat rolled piece is formed into a precisely sized rectangular rolled piece in the second box hole type K7, thereby improving the dimensional accuracy of the rolled piece and providing high-precision billets for the finishing rolling unit.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. By setting the finishing pass consisting of the first flat roll hole profile K6, the first box hole profile K5, the pre-slitting hole profile K4, the slitting hole profile K3, the second flat roll hole profile K2 and the finished hole profile K1, under the premise of maintaining the same cross-sectional area, the width of the second flat roll hole profile K2 is smaller than that of other hole profiles when the material height is the same, so the width of the second flat roll hole profile K2 is smaller, so that the deformation of the rolled piece is less, which is convenient for metal deformation, and the fullness of the transverse ribs of the Korean standard bamboo steel is improved, so as to achieve the effect of improving the production quality of the Korean standard bamboo steel and reducing the defective rate of the Korean standard bamboo steel;

[0025] 2. By setting the intermediate rolling pass consisting of the first elliptical hole type K12, the first circular hole type K11, the second elliptical hole type K10, the second circular hole type K9, the third flat roll hole type K8 and the second box hole type K7, the rolled piece can run smoothly and be easy to control in the intermediate rolling pass, thereby improving the stability and rolling accuracy of the Korean standard bamboo steel rolling production, thereby improving the dimensional accuracy of the rolled piece and providing high-precision billets for the finishing rolling unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of a Korean standard D19mm bamboo steel three-section rolling hole system in an embodiment of the present application.

[0027] Figure 2 It is a schematic diagram of the finished hole type K1 in the embodiment of the present application.

[0028] Figure 3 Schematic diagram of the second flat roller hole type K2 in the embodiment of the present application.

[0029] Figure 4 It is a schematic diagram of the cutting hole type K3 in the embodiment of the present application.

[0030] Figure 5 It is a schematic diagram of the pre-cut hole type K4 in the embodiment of the present application.

[0031] Figure 6 It is a schematic diagram of the first box hole type K5 in the embodiment of the present application.

[0032] Figure 7 Schematic diagram of the first flat roller hole type K6 in the embodiment of the present application.

[0033] Figure 8 It is a schematic diagram of the second box hole type K7 in the embodiment of the present application.

[0034] Fig. 9 It is a schematic diagram of the third flat roller hole type K8 in the embodiment of the present application.

[0035] Fig.10 It is a schematic diagram of the second circular hole type K9 in the embodiment of the present application.

[0036] Fig.11 It is a schematic diagram of the second elliptical hole type K10 in the embodiment of the present application.

[0037] Fig.12 It is a schematic diagram of the first circular hole type K11 in the embodiment of the present application.

[0038] Fig.13 It is a schematic diagram of the first elliptical hole type K12 in the embodiment of the present application. DETAILED DESCRIPTION

[0039] The following is combined with Figure 1-13 This application is described in further detail.

[0040] The present application embodiment discloses a Korean standard D19mm bamboo steel three-section rolling pass system. Figure 1 , including intermediate rolling passes and finishing passes distributed in sequence. The intermediate rolling passes include the first elliptical hole type K12, the first circular hole type K11, the second elliptical hole type K10, the second circular hole type K9, the third flat roll hole type K8 and the second box hole type K7 distributed in sequence. The finishing rolling pass includes the first flat roll hole type K6, the first box hole type K5, the pre-slitting hole type K4, the slitting hole type K3, the second flat roll hole type K2 and the finished hole type K1 distributed in sequence.

[0041] Reference Fig.13 The first elliptical hole type K12 is a single hole setting, the groove bottom height of the first elliptical hole type K12 is 115 mm, the total width of the first elliptical hole type K12 is 55 mm, and the arc radius of the first elliptical hole type K12 is 83 mm.

[0042] Reference Fig.12 The first circular hole type K11 is a single hole setting, the groove bottom height of the first circular hole type K11 is 68 mm, and the total width of the first circular hole type K11 is 74 mm.

[0043] Reference Fig.11 The second elliptical hole type K10 is a one-hole setting, the groove bottom height of the second elliptical hole type K10 is 90 mm, the total width of the second elliptical hole type K10 is 45 mm, and the arc radius of the second elliptical hole type K10 is 65 mm.

[0044] Reference Fig.10 The second circular hole type K9 is a one-hole setting, the groove bottom height of the second circular hole type K9 is 56 mm, and the total width of the second circular hole type K9 is 61 mm.

[0045] refer to Fig. 9 The third flat roller hole profile K8 is a hole-free setting, the groove bottom height of the third flat roller hole profile K8 is 41 mm, and the total width of the third flat roller hole profile K8 is 62 mm.

[0046] refer to Figure 8 The second box hole type K7 is a one-hole setting, the groove bottom height of the second box hole type K7 is 60mm, and the total width of the second box hole type K7 is 27mm.

[0047] refer to Figure 7 The first flat roller hole profile K6 is a hole-free setting, the groove bottom height of the first flat roller hole profile K6 is 24.5 mm, and the total width of the first flat roller hole profile K6 is 74 mm.

[0048] refer to Figure 6 The first box hole type K5 is a one-hole setting, the groove bottom height of the first box hole type K5 is 64mm, and the total width of the first box hole type K5 is 24mm.

[0049] refer to Figure 5 The pre-cut hole type K4 is set with three holes. The groove bottom height of the pre-cut hole type K4 is 24.68mm, the wedge top arc radius of the pre-cut hole type K4 is 2.1mm, the groove bottom radius of the pre-cut hole type K4 is 12.28mm, the wedge top spacing of the pre-cut hole type K4 is 25.73mm, and the center spacing of the pre-cut hole type K4 is 78.06mm.

[0050] refer to Figure 4 The cutting hole type K3 is a three-hole setting. The groove bottom height of the cutting hole type K3 is 23.63mm, the wedge top arc radius of the cutting hole type K3 is 0.94mm, the groove bottom radius of the cutting hole type K3 is 11.06mm, the wedge top spacing of the cutting hole type K3 is 26.04mm, and the center spacing of the cutting hole type K3 is 79.14mm.

[0051] refer to Figure 3 The second flat roller hole profile K2 is a hole-free setting, the groove bottom height of the second flat roller hole profile K2 is 12 mm, and the total width of the second flat roller hole profile K2 is 29.6 mm.

[0052] refer to Figure 2 The bottom height of the finished hole type K1 is 18.5mm.

[0053] The implementation principle of the three-section rolling hole system of Korean standard D19mm bamboo steel in the embodiment of the present application is as follows: the rough rolling piece passes through the first elliptical hole K12 to form an elliptical rolling piece, the elliptical rolling piece passes through the first circular hole K11 to form a circular rolling piece, the circular rolling piece passes through the second elliptical hole K10 to form an elliptical rolling piece, the elliptical rolling piece passes through the second circular hole K9 to form a circular rolling piece, the circular rolling piece passes through the third flat roll hole K8 to form a flat rolling piece, and then the flat rolling piece forms a rectangular rolling piece with precise dimensions in the second box hole K7. The rolling piece is made to run smoothly and be easy to control in the intermediate rolling pass, the stability and rolling accuracy of the Korean standard bamboo steel rolling production are improved, thereby improving the dimensional accuracy of the rolling piece, and providing high-precision billets for the finishing mill. The rectangular rolled piece is rolled along the width direction by the first flat roll pass K6 to reduce the bending phenomenon of the rolled piece head, so that the uniformly deformed rolled piece is rolled by the first box pass K5. The first box pass K5 squeezes the rolled piece material shape to the middle to improve the uniformity of the subsequent cut material shape. After that, the rectangular rolled piece is successively rolled by the pre-cutting pass K4 and the cutting pass K3 to improve the production efficiency of Korean standard bamboo steel. The cut rolled piece passes the second flat roll pass K2 to reduce the material width and pressure coefficient, and finally passes the finished pass K1 to form the finished steel. By adopting the second flat roll pass K2, under the premise of maintaining the same cross-sectional area, when the second flat roll pass K2 is the same as the material height of other pass shapes, the second flat roll pass K2 is smaller, so the second flat roll pass K2 is smaller, so that the deformation of the rolled piece is less, which is convenient for metal deformation. The fullness of the transverse ribs of the Korean standard bamboo steel is increased, thereby improving the production quality of the Korean standard bamboo steel and reducing the defective rate of the Korean standard bamboo steel.

[0054] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A Korean standard D19mm bamboo steel three-section rolling pass system, including sequentially distributed intermediate rolling passes and finishing rolling passes, characterized in that: The finishing pass includes a first flat roll hole profile K6, a first box hole profile K5, a pre-cutting hole profile K4, a cutting hole profile K3, a second flat roll hole profile K2 and a finished hole profile K1 which are distributed in sequence. The pre-cutting hole profile K4 and the cutting hole profile K3 are both three-hole settings, the second flat roll hole profile K2 is a hole-free setting, the groove bottom height of the second flat roll hole profile K2 is 12 mm, and the total width of the second flat roll hole profile K2 is 29.6 mm.

2. A Korean standard D19mm bamboo steel three-section rolling pass system according to claim 1, characterized in that: The first flat roller hole profile K6 is a hole-free setting, the groove bottom height of the first flat roller hole profile K6 is 24.5 mm, and the total width of the first flat roller hole profile K6 is 74 mm.

3. The Korean standard D19mm bamboo steel three-section rolling pass system according to claim 1, characterized in that: The first box hole type K5 is a one-hole arrangement, the groove bottom height of the first box hole type K5 is 64 mm, and the total width of the first box hole type K5 is 24 mm.

4. The Korean standard D19mm bamboo steel three-section rolling pass system according to claim 1, characterized in that: The groove bottom height of the pre-cut hole type K4 is 24.68mm, the wedge top arc radius of the pre-cut hole type K4 is 2.1mm, the groove bottom radius of the pre-cut hole type K4 is 12.28mm, the wedge top spacing of the pre-cut hole type K4 is 25.73mm, and the center spacing of the pre-cut hole type K4 is 78.06mm.

5. The Korean standard D19mm bamboo steel three-section rolling pass system according to claim 1, characterized in that: The groove bottom height of the cutting hole type K3 is 23.63mm, the wedge top arc radius of the cutting hole type K3 is 0.94mm, the groove bottom radius of the cutting hole type K3 is 11.06mm, the wedge top spacing of the cutting hole type K3 is 26.04mm, and the center spacing of the cutting hole type K3 is 79.14mm.

6. The Korean standard D19mm bamboo steel three-section rolling pass system according to claim 1, characterized in that: The groove bottom height of the finished hole type K1 is 18.5 mm.

7. The Korean standard D19mm bamboo steel three-section rolling pass system according to claim 1, characterized in that: The intermediate rolling pass includes a first elliptical hole profile K12, a first circular hole profile K11, a second elliptical hole profile K10, a second circular hole profile K9, a third flat roll hole profile K8 and a second box hole profile K7 which are distributed in sequence.

8. The Korean standard D19mm bamboo steel three-section rolling pass system according to claim 7, characterized in that: The first elliptical hole type K12, the first circular hole type K11, the second elliptical hole type K10, the second circular hole type K9 and the second box hole type K7 are all set with one hole, and the third flat roller hole type K8 is set without a hole.

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