A split-type anti-scratch guide roller device and an assembly-type large-disc channel

Abstract

This invention discloses a split-type anti-scratch guide roller device and an assembly-type large conduit channel, belonging to the field of high-speed wire rod rolling technology. The guide roller device of this invention includes a fixed support, a rotating support, and guide rollers. The guide rollers are mounted on the roller shaft via bearings. One end of the rotating support is rotatably fixed, and the other end is locked to the fixed support. The rolled piece enters through the inlet guide, passes through the gap between the two guide rollers, and exits through the outlet guide. Simultaneously, the inlet and outlet guides are also split-type designs; the rotating support rotates and opens along the rotation point, allowing the inlet and outlet guides to open synchronously to remove any accumulated steel in case of an accident. The assembly-type large conduit channel of this invention uses guide roller devices and transition guide grooves spaced apart on straight channels; and guide roller devices are continuously distributed on curved channels, thereby achieving rolling friction throughout the channel and effectively solving the problem of easy scratching of the rolled piece surface.

Description

Technical Field

[0001] This invention belongs to the field of high-speed wire rod rolling technology, specifically relating to a split anti-scratch guide roller device and an assembly-type large conduit channel. Background Technology

[0002] In high-speed wire rod rolling, the rolled piece is cooled to a temperature that is cold on the outside and hot on the inside after passing through the water cooling section. A relatively long recovery section is needed to ensure uniform temperature between the surface and core of the rolled piece before it enters the next processing stage. Most existing rolling channels are sliding guide grooves. During rolling, these guide grooves wear down, producing sharp angles and burrs, which scratch the product surface and affect the quality of subsequent processing such as cold heading or drawing. Surface quality issues have become the most significant quality problem for customers, especially on rolling lines with large concentric arc channels where scratches are most difficult to control. For larger sizes, scratches are a particularly prominent issue. In recent years, as customers have increasingly demanded higher surface quality for high-value-added products such as spring steel and bearing steel, various production lines have adopted a variety of improvement solutions. The main aim is to replace sliding friction with rolling friction to reduce or eliminate scratches. The main improvement methods include idler rollers, clamping rollers, and three-roller systems. While these measures can improve surface scratches on rolled parts to some extent in practical applications, the improvement effect still needs further enhancement.

[0003] A search revealed Chinese patent application number 201821247627.7, which discloses a single-roller rolling guide groove for preventing scratches in wire rod rolling lines. This application includes a guide groove body with a rolling guide roller at the end of the guide groove body in the rolling direction. The rolling guide roller is fixed to the guide groove body by guide roller bearings and pins. The guide groove body also has an internal cooling water hole on the right side in the rolling direction, which is connected to an external water pipe via a cooling water connector. An oil-gas quick-connect fitting is also provided at the lower part of the guide groove body, fixed to the guide groove body by a fastening nut, and connected to an oil-gas pipe. This application's rolling guide groove uses rolling friction instead of sliding friction, reducing mechanical scratches on the rolled piece within the guide groove. However, sliding friction still exists at bends, making the rolled piece susceptible to scratches. Furthermore, this application is cumbersome to operate when handling steel stacking. Summary of the Invention

[0004] 1. The problem to be solved

[0005] To address the problem of easily scratched workpiece surfaces in existing high-speed wire rod rolling processes, this invention provides a split-type anti-scratch guide roller device and an integrated large-disc channel. This invention employs a full-channel rolling friction design, effectively eliminating the easy scratching of the workpiece surface. Furthermore, the split-type design of the guide roller device facilitates convenient and rapid processing when accumulating steel in the channel, minimizing processing time.

[0006] 2. Technical Solution

[0007] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0008] The present invention provides a split-type anti-scratch guide roller device, comprising a fixed bracket, a rotating bracket, and guide rollers. The guide rollers are mounted on the roller shaft by bearings. One end of the rotating bracket is rotated and fixed, and the other end is locked with the fixed bracket. The rolled piece enters through the inlet guide, passes through the gap between the two guide rollers, and exits through the outlet guide. The rotating bracket rotates and opens along the rotation point to remove the stacked steel in case of an accident.

[0009] Furthermore, both the inlet guide and the outlet guide adopt a split design. The inlet guide is divided into two parts: one part is located in the mounting groove opened on the fixed bracket, and the other part is fixed in the mounting groove opened on the rotating bracket. The outlet guide is set in the same way as the inlet guide.

[0010] Furthermore, one end of the rotating bracket is connected to the fixed bracket via a rotating pin, and the other end is locked to the fixed bracket via a wing nut.

[0011] Furthermore, a lubrication chamber is formed inside the roller shaft, and an oil injection hole connected to the lubrication chamber is provided on the roller shaft, with the bearing immersed in the oil inside the lubrication chamber.

[0012] Furthermore, the roller shaft is provided with a bearing cap, and a bushing is provided between the bearing cap and the roller shaft.

[0013] Furthermore, the guide roller is provided with multiple heat dissipation holes.

[0014] Furthermore, eight heat dissipation holes are provided and are distributed in a ring around the center of the guide roller.

[0015] The present invention provides an assembly-type large pallet channel, including a support frame, on which the above-mentioned guide roller device is provided.

[0016] Furthermore, it also includes straight channels and arc-shaped channels, wherein the guide roller devices on the straight channels are distributed at intervals with the transition guide grooves, and the guide roller devices on the arc-shaped channels are continuously distributed.

[0017] Furthermore, the inlet end of the transition guide groove is lower than the outlet end.

[0018] 3. Beneficial effects

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] (1) The present invention provides a split anti-scratch guide roller device, which adopts a split design, can be debugged and assembled offline, and can be replaced as a whole in daily life, which is convenient and quick; the inlet guide and the outlet guide are also split designs, and can be opened at the same time as the split rotating bracket to remove the steel pile under the accident.

[0021] (2) The split anti-scratch guide roller device of the present invention adopts oil bath lubrication and is installed vertically. The upper and lower bearings are immersed in oil. The lubrication chamber adopts an appropriate increase in the height of the bearing cover and an internal bushing design, eliminating the shaft seal design. This shaft seal-free design effectively avoids the problem of high temperature damage to the seal. In addition, the guide roller adopts a multi-hole design, which increases the heat dissipation area of ​​the guide roller itself. Water cooling is not required, and the cooling water consumption is zero, which greatly saves costs.

[0022] (3) In the present invention, a complete large-disc channel is provided. In the arc channel, a continuous split anti-scratch guide roller device is installed, eliminating the intermediate guide groove. The workpiece is in a rolling friction state throughout the entire arc channel. In the straight channel, a split anti-scratch guide roller device is installed at intervals, with a guide groove in the middle for transition. When the guide groove is installed, the inlet end is slightly lower than the outlet end, which only serves as a guide. The workpiece does not contact the guide groove during operation, thereby realizing rolling friction throughout the channel and effectively solving the problem of easy scratching of the workpiece surface. Attached Figure Description

[0023] Figure 1 This is a front view of a split anti-scratch guide roller device according to the present invention;

[0024] Figure 2 This is a top view of a split anti-scratch guide roller device according to the present invention;

[0025] Figure 3 This is a side view of a split anti-scratch guide roller device according to the present invention;

[0026] Figure 4 This is a schematic diagram of the arrangement of a guide roller device on a large enclosing channel according to the present invention.

[0027] In the diagram: 1. Guide roller assembly; 11. Fixed bracket; 12. Rotating bracket; 121. Rotating pin; 122. Wing nut; 123. Union bolt; 13. Guide roller; 131. Heat dissipation hole; 14. Inlet guide; 15. Outlet guide;

[0028] 2. Bearing; 3. Roller shaft; 31. Lubrication chamber; 32. Oil injection hole; 33. Clamping bolt; 34. Upper pressure cover; 35. Lower pressure cover; 36. Bushing; 37. Bearing cover; 38. Bolt;

[0029] 4. Rolled part; 5. Transition guide groove. Detailed Implementation

[0030] The present invention will be further described below with reference to specific embodiments.

[0031] Example 1

[0032] like Figures 1-3 As shown, this embodiment of a split-type anti-scratch guide roller device includes a fixed bracket 11, a rotating bracket 12, and a guide roller 13. The guide roller 13 is mounted on a roller shaft 3 via a bearing 2. One end of the rotating bracket 12 is rotatably fixed, and the other end is locked to the fixed bracket 11. The rolled piece 4 enters through the inlet guide 14, passes through the gap between the two guide rollers 13, and exits through the outlet guide 15. The rotating bracket 12 rotates and opens at a certain angle around the rotation point. In addition, the inlet guide 14 and the outlet guide 15 are also split-type designs, opening simultaneously with the split-type rotating bracket 12 to facilitate the removal of the steel pile in case of an accident.

[0033] Specifically, in this embodiment, one end of the rotating bracket 12 is connected to the fixed bracket 11 via a rotating pin 121, and the other end is locked to the fixed bracket 11 via a wing nut 122 and a live bolt 123. Meanwhile, the inlet guide 14 is divided into two parts. Mounting holes are provided on the opposite sidewalls of the fixed bracket 11 and the rotating bracket 12. The first part of the inlet guide 14 is located in the mounting groove on the fixed bracket 11, and the other part is fixed in the mounting groove on the rotating bracket 12. The outlet guide 15 is configured in the same way as the inlet guide 14. Thus, the inlet and outlet guides open synchronously with the opening of the rotating bracket 12. When steel is piled in the channel, the wing nut 122 is loosened, and the rotating bracket 12 can open to a certain angle via the lower pivot. In this embodiment, the opening angle is approximately 10°, corresponding to an upper opening width of approximately 70mm. The maximum diameter of the red steel (rolled piece) is 20.5mm, which facilitates the removal of the piled steel. This has changed the past practice of having to cut the red steel into sections and pull them out from the end face, or disassemble the guide rollers and guide grooves, when steel is piled up in the channel, which greatly improves work efficiency.

[0034] In this embodiment, an upper pressure cover 34 is provided on the upper end face of the roller shaft 3. The upper pressure cover 34 is fixed to the upper end face of the roller shaft 3 by clamping bolts 33. A lower pressure cover 35 is provided on the lower end face of the roller shaft 3, and the fixing method of the lower pressure cover 35 is the same as that of the upper pressure cover 34. A lubrication chamber 31 is formed inside the roller shaft 3, and the bearing 2 is immersed in the oil in the lubrication chamber 31 to ensure lubrication effect. A bearing cover 37 is also provided on the roller shaft 3. The bearing cover 37 is fixed by bolts 38, and the bearing cover 37 is an extended design. A bushing 36 is provided between the bearing cover 37 and the roller shaft 3. This design eliminates the shaft seal design, avoids the problem of high temperature damaging the seal, and helps to extend the service life. In addition, the roller shaft 3 is provided with an oil injection hole 32 connected to the lubrication chamber 31, with an oil injection volume of about 500ml. Through actual use, using this shaft seal-free design, the oil change cycle is extended to 6 months, the replacement cycle of the bearing 2 is extended to 1 year, and the lubricating oil consumption is reduced by about 98%. Furthermore, this guide roller device requires no oil or gas consumption. Based on traditional consumption calculations, using Great Wall A100 lubricating oil as an example, with a unit price of 12.71 yuan / kg, the daily consumption would be 63kg / day * 12.71 yuan = 800.73 yuan / day. Assuming 100 days of use per year, this translates to an annual cost reduction of approximately 80,000 yuan.

[0035] To improve the service life of the guide roller 13, it is made of hot-work die steel with a service life of over 30,000 tons. During operation, the guide roller 13 is constantly in contact with the hot steel. Traditionally, cooling water is used to control its temperature. In this embodiment, the cooling water method is eliminated. The guide roller 13 adopts a porous design. Preferably, eight heat dissipation holes 131 are added to the guide roller 13, and these eight holes 131 are distributed in a ring around the center of the guide roller 13. The heat dissipation area of ​​the guide roller 13 is increased by approximately 40%, ensuring that the operating temperature of the guide roller 13 remains below 70°C. This design eliminates the need for circulating water. Based on the water consumption before the modification, 300 m³ / h * 0.57 yuan = 171 yuan / h * 20 = 3420 yuan / day. Assuming 100 days of use per year, the annual cost reduction is approximately 342,000 yuan.

[0036] In actual use, the wear condition of the guide rollers 13 along the entire channel is inconsistent; some wear on the top, some on the bottom, some wear very little, and some wear out quickly. To address this issue, the guide rollers 13 in this embodiment are designed to be interchangeable on the left and right, and can be used with their surfaces adjusted up and down, which can significantly increase the service life of the guide rollers 13.

[0037] Example 2

[0038] like Figure 4As shown, this embodiment of a large enclosing channel uses the guide roller device from Embodiment 1. This split-type anti-scratch guide roller device is continuously installed on the arc-shaped channel, without the need for intermediate transition guide grooves 5. All split-type anti-scratch guide roller devices are mounted on H-beam supports and fixed to the base plate with bolts. The spacing between guide roller devices 1 is approximately 25mm, and the alignment error between the inlet and the transfer device guide tube is ±0.2mm. The guide roller aperture here is designed to be 6mm larger than the workpiece size. The straight channel uses an indirect installation method between the transition guide groove 5 and the split-type anti-scratch guide roller device, which can be arbitrarily arranged according to the channel length. The inlet of the transition guide groove 5 is slightly lower than the outlet, serving only a guiding function to prevent the red steel from rubbing against the transition guide groove 5 during operation. The distance between the transition guide groove 5 and the guide roller 13 is 50mm, and the alignment error between the outlet and the inlet guide tube of other equipment is ±0.2mm. This design is based on two main considerations. First, it ensures that the red steel can pass smoothly through the inlet guide 14, between the two guide rollers, and through the outlet guide 15 before entering the next inlet guide 14. The red steel must not touch the ends of the inlet and outlet guides during the entire operation to avoid surface scratches. Second, in addition to leaving a gap between the two guide rollers for the red steel to pass through, it is also necessary to leave a certain amount of operating space for the inspection of other items.

[0039] This embodiment presents a complete large-diameter conduit channel, achieving full-channel rolling friction and effectively solving the problem of easy scratching on the surface of rolled workpieces. Since its implementation in February 2021 on the Maanshan Iron & Steel Special Steel high-speed wire rod production line, this solution has shown remarkable results. The scratching problem caused by the channel has been resolved, especially when rolling large gauges of 16mm and above, where the entire red-hot steel runs on the guide roller 13 without sliding contact with the guide groove. Under continuous production operation, no loosening, jamming, or bearing burnout has occurred. When dealing with stockpiled steel, the rotating support 12 is opened, and two people can operate the system, completing the process within 10 minutes. The service life of the guide roller 13 fully meets the requirements of over 30,000 tons, and there is no oil or water accumulation around the entire channel, greatly improving the production environment.

[0040] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A split-type anti-scratch guide roller device, characterized in that: Includes a fixed bracket (11), a rotating bracket (12), and a guide roller (13). The guide roller (13) is mounted on the roller shaft (3) via a bearing (2). One end of the rotating bracket (12) is fixed by rotation, and the other end is locked to the fixed bracket (11). The rolled piece (4) enters through the inlet guide (14), passes through the gap between the two guide rollers (13), and exits through the outlet guide (15). The rotating bracket (12) rotates and opens along the rotation point to remove the steel pile under the accident. The inlet guide (14) and outlet guide (15) are both designed in a split manner. The inlet guide (14) is divided into two parts. One part is located in the mounting groove opened on the fixed bracket (11), and the other part is fixed in the mounting groove opened on the rotating bracket (12). The outlet guide (15) is set in the same way as the inlet guide (14). One end of the rotating bracket (12) is connected to the fixed bracket (11) via a rotating pin (121), and the other end is locked to the fixed bracket (11) via a wing nut (122). The guide roller (13) is provided with multiple heat dissipation holes (131). The roller (3) has a lubrication chamber (31) inside, and the roller (3) has an oil injection hole (32) connected to the lubrication chamber (31). The bearing (2) is immersed in the oil in the lubrication chamber (31). The roller (3) is provided with a bearing cover (37), and a bushing (36) is provided between the bearing cover (37) and the roller (3).

2. The split-type anti-scratch guide roller device according to claim 1, characterized in that: The heat dissipation holes (131) are provided in eight places and are distributed in a ring along the center of the guide roller (13).

3. A complete large pallet channel, comprising a support frame, characterized in that: The bracket is provided with a guide roller device (1) as described in any one of claims 1-2; The assembly-type large enclosed channel includes a straight channel and an arc-shaped channel. The guide roller device (1) on the straight channel and the transition guide groove (5) are distributed at intervals, while the guide roller device (1) on the arc-shaped channel is continuously distributed.

4. The assembly-type large pallet passage according to claim 3, characterized in that: The inlet end of the transition guide groove (5) is lower than the outlet end.

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