A bar production line for changing four-cut rolling to three-cut rolling

Abstract

The utility model relates to bar rolling technical field especially a kind of bar production line of four cutting rolling changes three cutting rolling, including four cutting rolling production line, four cutting rolling production line is sequentially provided with K3 rolling mill, K2 rolling mill and K1 rolling mill, the outlet of K3 rolling mill is provided with first switching groove, the import of K2 rolling mill is provided with second switching groove, the outlet of K1 rolling mill is provided with third switching groove, first switching groove, second switching groove, third switching groove detachably install four cutting guide groove or first deflection guide, second deflection guide and third deflection guide.The utility model provides a kind of bar production line of four cutting rolling changes three cutting rolling, can reduce the change amount of equipment, without cross-shift personnel assistance, significantly reduce the labor intensity of worker, improve the rolling operation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of bar rolling technology, and in particular to a bar production line that modifies four-slit rolling to three-slit rolling. Background Technology

[0002] Hot-rolled ribbed steel bars (commonly known as rebar) are a core material in the construction industry, widely used in housing construction, bridge engineering, road construction, and other fields. In the industrial production of small-diameter rebar, in order to adapt to the specifications of different orders, the production line often adopts two process modes: three-splitting rolling and four-splitting rolling, and the splitting process needs to be modified and adjusted according to changes in orders.

[0003] Currently, the conversion between three-splitting and four-splitting processes on a full-specification four-bar production line presents significant technical challenges: due to the fundamental differences in the routing of the pre-finishing and post-rolling controlled cooling sections corresponding to the two processes, a large number of equipment needs to be replaced during the conversion process. Furthermore, personnel from the previous shift must be retained to assist in the disassembly and assembly of the pre-drilling water guide groove and the recovery section guide groove, resulting in extremely high labor intensity. At the same time, the conversion operation is often carried out simultaneously with equipment maintenance, leading to a shortage of auxiliary equipment such as overhead cranes, further extending the conversion cycle, affecting the production line's operating rate, and increasing the company's production costs. Utility Model Content

[0004] To address the aforementioned issues, this invention provides a bar production line that converts four-splitting rolling to three-splitting rolling, which reduces the amount of equipment modification required, eliminates the need for cross-shift personnel assistance, significantly reduces the labor intensity of employees, and improves the efficiency of the conversion rolling operation.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A bar production line that converts four-splitting rolling to three-splitting rolling includes a four-splitting rolling production line, wherein a K3 rolling mill, a K2 rolling mill, and a K1 rolling mill are sequentially arranged in the four-splitting rolling production line. Four sets of guide pipes are arranged between the K3 rolling mill and the K2 rolling mill, and four sets of guide pipes are arranged between the K2 rolling mill and the K1 rolling mill. A first switching groove is arranged after the exit of the K3 rolling mill, a second switching groove is arranged before the inlet of the K2 rolling mill, and a third switching groove is arranged after the exit of the K1 rolling mill. The four-splitting guide pipes of the four-splitting rolling production line are detachably connected to the corresponding first switching groove, second switching groove, and third switching groove, and the four-splitting guide pipes are connected to the corresponding guide pipes.

[0007] It also includes a first deflection guide, a second deflection guide, and a third deflection guide, wherein the first deflection guide, the second deflection guide, and the third deflection guide are detachably connected to the corresponding first switching slot, the second switching slot, and the third switching slot; each of the first deflection guide, the second deflection guide, and the third deflection guide is provided with three guide slots, and the three guide slots are connected to three sets of conduits.

[0008] Furthermore, a common guide groove is provided on the side of the first deflection guide away from the K3 mill. The common guide groove has four slots. Three of the slots on one side of the common guide groove are connected to three guide grooves of the first deflection guide, and the four slots on the other side of the common guide groove are connected to the corresponding conduits.

[0009] Furthermore, a guide member is provided at one end of the first deflection guide member near the K3 mill. The guide member is embedded in the first deflection guide member, and the guide member is provided with a guide groove that communicates with the guide groove of the first deflection guide member.

[0010] Furthermore, the guide is electrically connected to the first deflection guide via a fixing bolt.

[0011] Furthermore, the second deflection guide includes a second front deflection portion and a second rear deflection portion. A guide groove on one side of the second front deflection portion is connected to the corresponding guide tube, and a guide groove on the other side of the second front deflection portion is connected to the guide groove of the second rear deflection portion. The side of the second rear deflection portion away from the second front deflection portion is connected to the K2 rolling mill.

[0012] Both the second front deflection section and the second rear deflection section have guide ports on the side opposite to the direction of movement of the rolled piece.

[0013] Furthermore, the third deflection guide includes a third front deflection part and a third rear deflection part. The guide groove on one side of the third front deflection part is connected to the K1 rolling mill, and the guide groove on the other side of the third front deflection part is connected to the guide groove of the third rear deflection part. The side of the third rear deflection part away from the third front deflection part is connected to the corresponding guide tube.

[0014] Both the third front deflection section and the third rear deflection section have guide ports on the side opposite to the direction of movement of the rolled piece.

[0015] Furthermore, the guide groove is inclined along the movement direction of the rolled piece to accommodate the corresponding guide tube.

[0016] The beneficial effects of this utility model are:

[0017] By replacing the original four-splitting guide grooves at the exit of the K3 mill, the inlet of the K2 mill, and the exit of the K1 mill with the first deflection guide, the second deflection guide, and the third deflection guide, respectively, a three-point coordinated deflection is formed, guiding the rolled piece along the three lines of the four-splitting process. This eliminates the need to disassemble the recovery section guide tube, the post-rolling water-passing device, and the guide groove before the shearing equipment during the re-rolling process, enabling the sharing of core equipment, simplifying the re-rolling process, reducing manpower consumption, shortening the re-rolling time, and improving the operating rate. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a bar production line that converts four-splitting rolling to three-splitting rolling according to a preferred embodiment of this utility model.

[0019] Figure 2 This is a schematic diagram of the first deflection guide structure of a bar production line that modifies four-splitting rolling to three-splitting rolling according to a preferred embodiment of this utility model.

[0020] In the diagram, 101-guide tube, 11-K3 rolling mill, 12-K2 rolling mill, 13-K1 rolling mill, 201-guide groove, 21-first deflection guide, 211-guide component, 212-guide groove, 213-fixing bolt, 22-second deflection guide, 221-second front deflection section, 222-second rear deflection section, 23-third deflection guide, 231-third front deflection section, 232-third rear deflection section. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] Please also see Figure 1 and Figure 2 This utility model discloses a preferred embodiment of a bar production line that modifies four-splitting rolling to three-splitting rolling. The four-splitting rolling production line includes a K3 rolling mill 11, a K2 rolling mill 12, and a K1 rolling mill 13 arranged sequentially. Four sets of guide tubes 101 are arranged between the K3 rolling mill 11 and the K2 rolling mill 12, and between the K2 rolling mill 12 and the K1 rolling mill 13. The four sets of guide tubes 101 are, in order, guide tube #1, guide tube #2, guide tube #3, and guide tube #4.

[0025] A first switching groove is provided after the exit of K3 rolling mill 11, a second switching groove is provided before the inlet of K2 rolling mill 12, and a third switching groove is provided after the exit of K1 rolling mill 11. The four-splitting guide groove of the four-splitting rolling production line can be detachably connected to the corresponding first switching groove, second switching groove, and third switching groove, and the four-splitting guide groove is connected to the corresponding guide tube 101.

[0026] It also includes a first deflection guide 21, a second deflection guide 22, and a third deflection guide 23. The first deflection guide 21, the second deflection guide 22, and the third deflection guide 23 are detachably connected to their corresponding first switching slot, second switching slot, and third switching slot, respectively. Each of the first deflection guide 21, the second deflection guide 22, and the third deflection guide 23 is provided with three guide grooves 201, and these three guide grooves 201 are connected to three sets of conduits 101. In this embodiment, the three guide grooves 201 are respectively connected to conduit #1, conduit #2, and conduit #4.

[0027] By replacing the original four-splitting guide grooves at the exit of K3 mill 11, the inlet of K2 mill 12, and the exit of K1 mill 11 with the first deflection guide 21, the second deflection guide 22, and the third deflection guide 23, respectively, a three-point coordinated deflection is formed, guiding the rolled piece along the three lines of the four-splitting process. This eliminates the need for disassembly and assembly of the recovery section guide tube, the post-rolling water-passing device, and the guide groove before the shearing equipment during the re-rolling process, enabling the sharing of core equipment, simplifying the re-rolling process, reducing manpower consumption, shortening the re-rolling time, and improving the operating rate.

[0028] like Figure 2As shown, a common guide groove 3 is provided on the side of the first deflection guide 21 away from the K3 mill 11. The common guide groove 3 is provided with four slots 31. Three of the slots 31 on one side of the common guide groove 3 are connected to the three guide grooves 201 of the first deflection guide 21, and the four slots 31 on the other side of the common guide groove 3 are connected to the corresponding guide tubes 101.

[0029] This embodiment is for the three-splitting and four-splitting conversion rolling operation of 18mm specification rebar. The width of the common guide groove 3 is 36mm, which can be adapted to four-splitting rolling and three-splitting rolling.

[0030] like Figure 2 As shown, a guide member 211 is provided at one end of the first deflection guide 21 near the K3 rolling mill 11. The guide member 211 is embedded in the first deflection guide 21, and the guide member 211 is provided with a guide groove 212 that communicates with the guide groove 201 of the first deflection guide 21. The guide member 211 is electrically connected to the first deflection guide 21 by a fixing bolt 213. In this embodiment, the guide groove 212 has a trapezoidal structure, and the long base of the guide groove 212 faces the K3 rolling mill 11. The end of the guide groove 201 of the first deflection guide 21 near the guide groove 212 is also a trapezoidal structure, and the end of the guide groove 201 of the first deflection guide 21 near the guide groove 212 is the long base.

[0031] The first deflection guide 21 is a component that is prone to wear. The guide 21 near the K3 mill 11 can be disassembled and replaced without replacing the entire first deflection guide 21. At the same time, by replacing the guide 21, the size of the roll diameter can be adapted.

[0032] In this embodiment, the second deflection guide 22 includes a second front deflection portion 221 and a second rear deflection portion 222. The guide groove 201 on one side of the second front deflection portion 221 is connected to the corresponding guide tube 101, and the guide groove 201 on the other side of the second front deflection portion 221 is connected to the guide groove 201 of the second rear deflection portion 222. The side of the second rear deflection portion 222 away from the second front deflection portion 221 is connected to the K2 rolling mill 12.

[0033] The second front deflection section 221 and the second rear deflection section 222 are both provided with guide ports on the side opposite to the direction of movement of the rolled piece.

[0034] In this embodiment, the third deflection guide 23 includes a third front deflection part 231 and a third rear deflection part 232. The guide groove 201 on one side of the third front deflection part 231 is connected to the K1 rolling mill 11, and the guide groove 201 on the other side of the third front deflection part 231 is connected to the guide groove 201 of the third rear deflection part 232. The side of the third rear deflection part 232 away from the third front deflection part 231 is connected to the corresponding guide tube 101.

[0035] Both the third front deflection section 231 and the third rear deflection section 232 have guide ports on the side opposite to the direction of movement of the rolled piece.

[0036] The guide openings and slots 31 of the second front deflection section 221, the second rear deflection section 222, the third front deflection section 231, and the third rear deflection section 232 are all trapezoidal structures at the end near the first deflection guide 21, and the long bottom edge of the guide opening faces away from the direction of movement of the rolled piece to ensure stable conveying of the bar.

[0037] In this embodiment, the guide groove 201 is inclined along the movement direction of the rolled piece to fit the corresponding guide tube 101. The inclination angle in this embodiment is 1-3°, and the inner wall of the guide groove 201 is polished with a roughness Ra≤1.6μm. The connection interface is compatible with existing equipment on the production line. Furthermore, the guide groove 201 is adapted to core dimensional parameters such as the channel offset for guide grooves with a three-section 162mm center distance and a four-section 125mm center distance.

[0038] In this embodiment, when switching from the four-splitting process to the 18-thread three-splitting process, the four-splitting guide groove is disassembled, and the first deflection guide 21, the second deflection guide 22, and the third deflection guide 23 are installed into the corresponding first switching groove, second switching groove, and third switching groove, respectively. The deflection direction and angle of the guide groove are calibrated using a laser positioning instrument to ensure that the rolling mill line coincides with the three lines on the south side of the four-splitting process. Finally, it is fixed with bolts. After the production line is started, the rolling mill is stably conveyed through the three sets of deflection guide grooves. The dimensional accuracy and mechanical properties of the finished threaded steel meet the requirements of GB / T 1499.2-2018 standard. The entire conversion rolling process takes 88 minutes, achieving the expected design effect.

[0039] In this embodiment, only the exit guide groove of K3 mill 11, the pre-drilling water cooling device, the front guide groove of No. 8 looper, and the exit guide groove of K1 mill 13 are replaced. The recovery section guide tube, the post-rolling water cooling device, and the front guide groove of No. 3 shear are left unchanged.

Claims

1. A bar production line for converting four-splitting rolling to three-splitting rolling, comprising a four-splitting rolling production line, wherein the four-splitting rolling production line is sequentially provided with a K3 rolling mill (11), a K2 rolling mill (12) and a K1 rolling mill (13), wherein four sets of guide tubes (101) are provided between the K3 rolling mill (11) and the K2 rolling mill (12), and four sets of guide tubes (101) are provided between the K2 rolling mill (12) and the K1 rolling mill (13), characterized in that, The K3 mill (11) is provided with a first switching groove after the exit, the K2 mill (12) is provided with a second switching groove before the inlet, and the K1 mill (13) is provided with a third switching groove after the exit. The four-splitting guide groove of the four-splitting rolling production line is detachably connected to the corresponding first switching groove, second switching groove and third switching groove, and the four-splitting guide groove is connected to the corresponding guide tube (101). It also includes a first deflection guide (21), a second deflection guide (22) and a third deflection guide (23), the first deflection guide (21), the second deflection guide (22) and the third deflection guide (23) being detachably connected to the corresponding first switching slot, the second switching slot and the third switching slot; the first deflection guide (21), the second deflection guide (22) and the third deflection guide (23) are each provided with three guide slots (201), and the three guide slots (201) are connected to three sets of conduits (101).

2. The bar production line for converting four-splitting rolling to three-splitting rolling according to claim 1, characterized in that: The first deflection guide (21) is provided with a common guide groove (3) on the side away from the K3 mill (11). The common guide groove (3) is provided with four slots (31). Three of the slots (31) on one side of the common guide groove (3) are connected to the three guide grooves (201) of the first deflection guide (21). The four slots (31) on the other side of the common guide groove (3) are connected to the corresponding conduit (101).

3. The bar production line for converting four-splitting rolling to three-splitting rolling according to claim 2, characterized in that: The first deflection guide (21) is provided with a guide (211) at one end near the K3 mill (11). The guide (211) is embedded in the first deflection guide (21), and the guide (211) is provided with a guide groove (212) that communicates with the guide groove (201) of the first deflection guide (21).

4. The bar production line for converting four-splitting rolling to three-splitting rolling according to claim 3, characterized in that: The guide (211) is electrically connected to the first deflection guide (21) by a fixing bolt (213).

5. The bar production line for converting four-splitting rolling to three-splitting rolling according to claim 1, characterized in that: The second deflection guide (22) includes a second front deflection part (221) and a second rear deflection part (222). The guide groove (201) on one side of the second front deflection part (221) is connected to the corresponding guide tube (101). The guide groove (201) on the other side of the second front deflection part (221) is connected to the guide groove (201) of the second rear deflection part (222). The side of the second rear deflection part (222) away from the second front deflection part (221) is connected to the K2 rolling mill (12). The second front deflection part (221) and the second rear deflection part (222) are both provided with guide ports on the side opposite to the movement direction of the rolled piece.

6. The bar production line for converting four-splitting rolling to three-splitting rolling according to claim 1, characterized in that: The third deflection guide (23) includes a third front deflection part (231) and a third rear deflection part (232). The guide groove (201) on one side of the third front deflection part (231) is connected to the K1 rolling mill (13), and the guide groove (201) on the other side of the third front deflection part (231) is connected to the guide groove (201) of the third rear deflection part (232). The side of the third rear deflection part (232) away from the third front deflection part (231) is connected to the corresponding guide tube (101). Both the third front deflection section (231) and the third rear deflection section (232) have guide openings on the side opposite to the direction of movement of the rolled piece.

7. The bar production line for converting four-splitting rolling to three-splitting rolling according to claim 1, characterized in that: The guide groove (201) is inclined along the moving direction of the rolled piece to fit the corresponding guide tube (101).

Images