A Φ25mm specification hot-rolled ribbed steel bar two-split rolling split loop device

Abstract

The application discloses a Φ25mm specification hot-rolled ribbed steel bar two-cutting rolling split sleeve device, which has a cutting empty guide groove body, a V-shaped partition plate is arranged in the middle of the cutting empty guide groove body, the V-shaped partition plate divides the inner cavity of the cutting empty guide groove body into two V-shaped passages, and a straight section is connected to the outlet end of each V-shaped passage; a hanging column is arranged on the left and right sides of the inlet side and the outlet side of the cutting empty guide groove body respectively; an inlet guide groove and an outlet guide groove are further arranged, hooks are arranged on the outer sides of the inlet guide groove, and the hooks are connected with the hanging columns on the inlet side of the cutting empty guide groove body; through the improvement, the cutting rolling is very smooth, and there is no steel stacking phenomenon at the inlet of the cutting split sleeve device.

Description

Technical Field

[0001] This invention relates to the field of steel rolling technology, and in particular to a cutting looper for two-splitting rolling of hot-rolled ribbed steel bars with a specification of Φ25mm. Background Technology

[0002] Split rolling technology, as a new rolling technology with advantages such as high productivity and energy saving, has become an effective means to promote increased production and energy conservation in the steel rolling industry. To achieve cost reduction and efficiency improvement, a two-slit rolling process for Φ25mm rebar has been developed on the bar production line. The rolled stock passes through roughing and intermediate rolling successively before entering the finishing mill. After pre-cutting and rolling through the splitting holes, it forms two parallel rolled stocks, which are then separated by the exit splitting guide. After being divided in two by the splitting roller, the rolled stock enters the splitting looper through the distribution box.

[0003] Based on the die design and roll strength requirements, the roll arrangement for the two-section cutting rolls of Φ25mm rebar was adjusted: the spacing between rolls K2 and K1 was increased from the conventional 135mm to 270mm. To meet the roll arrangement requirements for the two-section cutting rolls of Φ25mm rebar, the looper was redesigned, with the center distance between the two lines of the looper made at 270mm. However, during production, frequent steel accumulation still occurred in the looper. This not only failed to demonstrate the advantages of cutting rolling in terms of output but also increased the labor intensity of workers frequently handling scrap steel. Consequently, the rolling line could no longer continue rolling Φ25mm two-section steel, forcing a switch to other specifications. Observation revealed that after exiting the cutting guide, the steel head struck the edge of the looper's inlet guide groove. When the looper lifted, tension was created, causing the steel to run tightly against the edge, generating friction. This caused iron to stick to the inlet guide groove, forming large lumps, resulting in the steel head bending and changing its direction of movement, thus leading to the steel accumulation accident. Summary of the Invention

[0004] The purpose of this invention is to address the above-mentioned issues by providing a cutting looper for two-stage cutting of Φ25mm hot-rolled ribbed steel bars. Through improvements, the cutting and rolling process is very smooth, and there is no steel accumulation at the inlet of the cutting looper.

[0005] The specific solution of this invention is: a cutting looper for two-stage cutting of Φ25mm hot-rolled ribbed steel bars, comprising a cutting guide groove body with an inner cavity width of 360mm. A V-shaped partition is provided in the middle of the inner cavity of the cutting guide groove body, dividing it into two V-shaped channels. The inlet of each V-shaped channel is larger than its outlet. A straight section with a length of 300mm is connected to the outlet end of each V-shaped channel. A hanging column is provided on the left and right sides of both the inlet and outlet sides of the cutting guide groove body. An inlet... The inlet guide groove and outlet guide groove are provided. Hooks are provided on both sides of the outer side of the inlet guide groove and are connected to the hanging post on the inlet side of the cutting empty passage guide groove body. Hooks are provided on both sides of the outer side of the outlet guide groove and are connected to the hanging post on the outlet side of the cutting empty passage guide groove body. The outer side of the inlet guide groove is set into a trapezoidal shape. The inner cavity of the inlet guide groove is divided into two inclined inlet channels by a trapezoidal partition. The outlet guide groove is also provided with two outlet channels. Each outlet channel consists of a V-shaped segment and a straight segment connected to the end of the V-shaped segment. The width of the rolling line running of the straight segment at the end of the outlet channel is set to 56mm.

[0006] Furthermore, in this invention, the upper and lower widths of the trapezoidal partition in the inner cavity of the inlet guide groove are 20mm and 50mm, respectively.

[0007] Furthermore, the tip of the V-shaped partition in this invention extends to the edge of the inlet end of the cut-through guide groove body.

[0008] Furthermore, in this invention, the hanging post is a 60mm long Φ40mm cylinder, and a damping sleeve is used for connection between the hook and the hanging post.

[0009] Furthermore, in this invention, lifting hooks are provided on both the left and right sides of the top front and rear ends of the cut-through guide channel body.

[0010] This invention improves the traditional slitting looper structure by eliminating the lifting and pressing rollers on the traditional looper and designing a structure that separates the looper body through the guide groove. This makes rolling smoother, eliminates steel piling at the inlet of the slitting looper, and ensures that the Φ25mm rebar product's dimensions and negative tolerances meet the national standards for hot-rolled ribbed steel bars and user requirements. The daily production capacity can reach 4,600 tons, which is about 600 tons higher than a single line, truly achieving the goal of increasing production and efficiency. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the original cut-and-loop structure; Figure 2 yes Figure 1 A top-view structural diagram; Figure 3 This is a schematic diagram of the structure in the main view direction of the present invention; Figure 4 This is a top-view structural diagram of the present invention; Figure 5 This is a schematic diagram of the side-view cross-section structure of the present invention; Figure 6 This is a schematic diagram of the inlet guide groove structure in the main view direction of the present invention; Figure 7 This is a top view schematic diagram of the inlet guide groove structure in this invention; Figure 8 This is a schematic diagram of the outlet guide groove structure in the main view direction of the present invention; Figure 9 This is a top-view structural diagram of the outlet guide groove in this invention.

[0012] In the diagram: 1—Outlet guide channel, 2—Hanging column, 3—Lifting hook, 4—Cut-off guide channel body, 5—Inlet guide channel, 6—Straight section, 7—V-shaped partition, 8—V-shaped channel, 9—Hook, 10—Sloping inlet channel, 11—Trapezoidal partition, 12—Outlet channel. Detailed Implementation

[0013] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0014] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., which indicate orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed when in use. They are only for the convenience of describing this invention or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0015] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0016] Figure 1, Figure 2 This is a schematic diagram of the original looper structure, which is a mature and existing looper structure technology.

[0017] See Figures 3-9 This invention relates to a cutting looper for two-stage cutting of Φ25mm hot-rolled ribbed steel bars. It comprises a cutting guide trough body 4 with an inner cavity width of 360mm. A V-shaped partition 7 is disposed in the middle of the inner cavity of the cutting guide trough body, dividing it into two V-shaped channels 8. The two V-shaped channels have a larger inlet and a smaller outlet. A straight segment 6 with a length of 300mm is connected to the outlet end of each V-shaped channel. Furthermore, the tip of the V-shaped partition extends to the edge of the inlet end of the cutting guide trough body. A hanging post 2 is provided on each of the left and right sides of the inlet and outlet sides of the cutting guide trough body. An inlet guide trough 5 and an outlet guide trough 5 are also provided. The inlet guide trough 1 has hooks 9 on both sides of its outer surface, which are connected to the hanging post 2 on the inlet side of the cut-through guide trough body. The outlet guide trough has hooks on both sides of its outer surface, which are connected to the hanging post on the outlet side of the cut-through guide trough body. The outer surface of the inlet guide trough is trapezoidal. The inner cavity of the inlet guide trough is divided into two inclined inlet channels 10 by a trapezoidal partition 11. Further, in this invention, the upper and lower base widths of the trapezoidal partition in the inner cavity of the inlet guide trough are 20mm and 50mm, respectively. The outlet guide trough is also provided with two outlet channels 12. Each outlet channel is composed of a V-shaped segment and a straight segment connected to the end of the V-shaped segment. The width of the rolling line running of the straight segment at the end of the outlet channel is set to 56mm.

[0018] Furthermore, in this embodiment, the hanging column is a 60mm long Φ40mm cylinder, and a damping sleeve is used for connection between the hook and the hanging column. Furthermore, in this invention, lifting hooks 3 are provided on both the left and right sides of the top front and rear ends of the top of the cut-through guide channel body.

[0019] The device of the present invention is implemented as follows: 1. Machining a 360mm wide internal cavity guide channel body, modifying the guide channel with V-shaped baffles to form two V-shaped channels with a larger inlet and a smaller outlet, and retaining a 300mm long straight section at the outlet. At the same time, machining a 60mm long Φ40mm cylindrical hanging column on the left and right sides of the inlet and outlet of the guide channel.

[0020] 2. Based on the external dimensions of the cutting guide box, design and manufacture an inlet guide channel that is well connected to the cutting guide channel body. Hang the inlet guide channel hook on the Φ40mm cylindrical hanging column so that the steel can smoothly enter the two V-shaped channels in the cutting guide channel body.

[0021] 3. The outlet guide channel is redesigned and manufactured according to the width of the cut-out guide channel body, and is hung on the hanging column of the outlet guide channel by the hook on it; the outlet guide channel is also provided with two outlet channels, each outlet channel is composed of a V-shaped segment and a straight segment connected to the end of the V-shaped segment, and the width of the rolling line running of the straight segment at the end of the outlet channel is set to 56mm.

[0022] This invention improves the traditional slitting looper structure by eliminating the lifting and pressing rollers on the traditional looper and designing a structure that separates the looper body through the guide groove. This makes rolling smoother, eliminates steel piling at the inlet of the slitting looper, and ensures that the Φ25mm rebar product's dimensions and negative tolerances meet the national standards for hot-rolled ribbed steel bars and user requirements. The daily production capacity can reach 4,600 tons, which is about 600 tons higher than a single line, truly achieving the goal of increasing production and efficiency.

Claims

1. A cutting looper for two-way cutting of Φ25mm hot-rolled ribbed steel bars, characterized in that: The device includes a split-through guide channel body with an inner cavity width of 360mm. A V-shaped partition is installed in the middle of the inner cavity, dividing it into two V-shaped channels. The two V-shaped channels have a larger inlet and a smaller outlet. A straight segment, 300mm long, connects to the outlet end of each V-shaped channel. A hanging post is located on each side of the inlet and outlet sides of the split-through guide channel body. It also includes an inlet guide channel and an outlet guide channel. Hooks are located on both sides of the inlet guide channel and connect to the hanging post on the inlet side of the split-through guide channel body. The outlet... Hooks are provided on both sides of the outer side of the guide channel and are connected to the hanging post on the outlet side of the cut-through guide channel body through the hooks. The outer side of the inlet guide channel is set in a trapezoidal shape. The inner cavity of the inlet guide channel is divided into two inclined inlet channels by a trapezoidal partition. The outlet guide channel is also provided with two outlet channels. Each outlet channel is composed of a V-shaped segment and a straight segment connected to the end of the V-shaped segment. The width of the rolling line running of the straight segment at the end of the outlet channel is set to 56mm. The upper and lower base widths of the trapezoidal partition in the inner cavity of the inlet guide channel are 20mm and 50mm, respectively. The tip of the V-shaped partition extends to the edge of the inlet end of the cut-through guide channel body.

2. A cutting looper for two-stage cutting of Φ25mm hot-rolled ribbed steel bars according to claim 1, characterized in that: The hanging post is a 60mm long Φ40mm cylindrical column, and a damping sleeve is used to connect the hook to the hanging post.

3. A cutting looper for two-stage cutting of Φ25mm hot-rolled ribbed steel bars according to claim 1, characterized in that: The top front and rear ends of the cut-through guide channel body are each provided with lifting hooks on the left and right sides.

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