Rolling entry guide

Abstract

A kind of rolling import guide, including frame of plate and frame, the middle part of frame is arranged with feed guide pipe at through-hole, the side plate of frame is provided with swing arm, swing arm bending place is hinged on frame by swing arm shaft, the inner end of swing arm is rotatably connected with guide wheel and guide wheel is located at the end of feed guide pipe, swing arm is arranged 3 or 4 evenly in the circumferential range of feed guide pipe;During the swing of swing arm around swing arm shaft, the common plane of each guide wheel core is parallel to the common plane of swing arm shaft and perpendicular to the pipe core of feed guide pipe, swing arm adjusting mechanism and gas spring support mechanism are arranged on frame, swing arm adjusting mechanism includes nut hole arranged on frame, the inner end face of bolt top rod is smooth curved surface, nut cap is arranged on the outer periphery of bolt top rod away from the inner end and located outside the nut hole.The technical scheme avoids the disassembly difficulty caused by corrosion of guide wheel swing arm adjusting mechanism affected by environment.

Description

Technical Field

[0001] This application relates to rolling mill accessories, specifically the rolling inlet guide for rolling bar production. Background Technology

[0002] When rolling wire rods, guides need to be installed at the inlet and outlet of the rolling mill to guide the workpiece to be rolled. Rolling guides are widely used because they have significant advantages such as low friction loss, low vibration and low noise. For example, a specific solution is disclosed in a paper entitled "Three-roll Finishing Assembly for Bars" (document number CN109226361A). The

[0023] section of its specification describes the solution adopted by the adjustment mechanism, which includes "an adjustment seat 23, an adjustment rod 24, an adjustment rod sleeve 25, an adjustment rod screw 26 and an adjustment ring 27, which are fitted and connected to the through hole of the guide plate 1 and pressed against the front surface below the bracket 28. The adjustment ring 27 is installed on the adjustment seat." The adjusting rod 24 is inserted into the adjusting rod sleeve 25 and locked with an internal hexagon screw. The adjusting rod sleeve 25 connects the bracket 28 to the guide plate 1. The adjusting rod 24 is inserted into the adjusting rod sleeve 25 and locked with an adjusting rod screw 26. An adjusting rod sealing ring 27 is provided between the adjusting rod 24 and the adjusting rod sleeve 25. In the above scheme, the adjusting rod 24 is actually equivalent to a nut slider, so it needs to be set with circumferential rotation limit. For the adjusting rod screw 2, it needs to be set with axial limit rotation scheme. For this purpose, the adjusting ring 27 needs to be installed and locked on the adjusting seat 23 with an internal hexagon screw and abut against the axial end face of the bolt head of the adjusting rod screw 26. It is evident that the adjustment mechanism provided in Reference 1 not only has many parts, resulting in high processing costs and complex assembly, but also exposes the adjustment rod screw 26 and the internal hexagon screw that locks the adjustment ring 27 onto the adjustment seat 23. In the dusty and humid environment of the rolling mill, corrosion of the adjustment rod screw 26 and the internal hexagon screw is inevitable. In particular, the blind hole of the internal hexagon screw will be blocked, making the entire adjustment mechanism impossible to disassemble. Utility Model Content

[0003] The purpose of this invention is to provide a rolling inlet guide that avoids the difficulty of disassembly caused by rust due to environmental factors affecting the adjustment mechanism of the guide wheel swing arm.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A rolling inlet guide includes a plate-frame structure. A feed guide is arranged at a through hole in the middle of the frame. A swing arm is provided on one side plate of the frame. The swing arm is shaped like a folded rod, with the bend hinged to the frame by a swing arm shaft. A guide wheel is rotatably connected to the inner end of the swing arm, and the guide wheel is located at one end of the feed guide. Three or four swing arms are evenly spaced around the circumference of the feed guide, and the length direction of the swing arms is consistent with the radial direction of the feed guide. During the swing of the swing arm around the swing arm shaft, the core of each guide wheel... The plane coplanar with the plane coplanar with the swing arm axis and perpendicular to the feed guide tube core, the frame is equipped with a swing arm adjustment mechanism and a gas spring support mechanism. The swing arm adjustment mechanism and the gas spring support mechanism are located on the same side of the inner and outer arm sections of the swing arm with the swing arm axis as the boundary. The swing arm adjustment mechanism includes a nut hole provided on the frame, and the bolt push rod and the nut hole form a threaded fit. The inner end face of the bolt push rod is a smooth curved surface. A nut cap is provided on the outer periphery of the bolt push rod that is away from the inner end of the bolt push rod and located outside the nut hole.

[0006] In the above technical solution, the inner end face of the bolt top rod is set as a smooth curved surface to ensure that a stable and reliable contact surface can be obtained when pushing the arm body. After the arm position is properly adjusted, the bolt head is covered with a nut cap, which isolates the bolt head from dust and high humidity environment, avoiding the adverse effects of environmental dust, high temperature and humidity, and making disassembly and assembly operations unimpeded. Attached Figure Description

[0007] Figure 1 This is the front view of this utility model;

[0008] Figure 2 , 3 They are Figure 1 Left and right views;

[0009] Figure 4 yes Figure 3 AA section view in the middle;

[0010] Figure 5 This is a three-dimensional exploded view of the swing arm adjustment mechanism of this utility model;

[0011] Figure 6 , 7 This is a three-dimensional schematic diagram of the swing arm adjustment mechanism of the utility model. Detailed Implementation

[0012] First, it should be noted that the inner and outer sections of the swing arm 30 mentioned in this application refer to the section of the swing arm 30 that is closer to the center of the guide and the section that is farther away from the center of the guide within the length of the swing arm 30. In addition, regarding the bolt top rod 41, the end that is closer to the swing arm 30 is the inner section and the end that is farther away from the swing arm 30 is the outer section.

[0013] See Figure 1 ,2 3, 4, The rolling inlet guide includes a plate-frame type frame 10. A feed guide 20 is arranged at the through hole in the middle of the frame 10. A swing arm 30 is provided on one side plate of the frame 10. The swing arm 30 is shaped like a folded rod, and the bend is hinged to the frame 10 by a swing arm shaft 31. A guide wheel 32 is rotatably connected to the inner end of the swing arm 30, and the guide wheel 32 is located at one end of the feed guide 20. Three or four swing arms 30 are evenly spaced within the circumference of the feed guide 20, and the length direction of the swing arm 30 is consistent with the radial direction of the feed guide 20. During the swing of the swing arm 30 around the swing arm shaft 31, each guide wheel 32... The coplanar plane of the two wheel cores is parallel to the coplanar plane of the swing arm shaft 31 and perpendicular to the core of the feed guide tube 20. The frame 10 is provided with a swing arm adjustment mechanism 40 and a gas spring support mechanism 50. The swing arm adjustment mechanism 40 and the gas spring support mechanism 50 are located on the same side of the inner and outer arm sections of the swing arm 30, with the swing arm shaft 31 as the boundary. The swing arm adjustment mechanism 40 includes a nut hole on the frame 10. The bolt push rod 41 is threadedly engaged with the nut hole. The inner end face of the bolt push rod 41 is a smooth curved surface. A nut cap 42 is provided on the outer periphery of the bolt push rod 41, which is away from the inner end of the bolt push rod 41 and located outside the nut hole.

[0014] Figures 1-4 In the specific embodiment shown, four swing arms 30 are evenly spaced around the circumference of the feed conduit 20. Guide wheels 32 are mounted on these arms, located around one end of the feed conduit 20. The circumferential grooves on the surface of the guide wheels 32 have an arc-shaped cross-section. The contours of the guide wheels 32, passing through the wheel core and perpendicular to the cross-section of the feed conduit 20 core, form discontinuous arc segments on the side where the feed conduit 20 is located. The diameter of these arc segments is the same as or slightly smaller than the inner diameter of the feed conduit 20. The floating end of the gas spring support mechanism 50 abuts against the outer arm segment of the swing arm 30, bounded by the swing arm shaft 31. Figure 4 For example, the gas spring support mechanism 50 abuts against the arm section of the swing arm 30 above the swing arm shaft 31, while the swing arm adjustment mechanism 40 abuts against the arm section of the swing arm 30 below the swing arm shaft 31. When no external force is applied, the position of the swing arm 30 is... Figure 4 As shown in the static diagram, when the rolled piece travels from the feed duct 20 into the circular area enclosed by the guide wheel 32, due to the impact, the guide wheel 32 rotates around the guide wheel shaft 321, thus providing rolling support for the rolled piece. Simultaneously, it drives the swing arm 30 to swing around the swing arm shaft 31 at a very small angle. Because the gas spring support mechanism 50 abuts against the swing arm 30, it provides elastic resistance that limits the swing of the swing arm 30. This achieves stable and reliable guidance and protection of the rolled piece by the device. Figure 2 , 3 As shown, to accommodate the installation of the four swing arms 30, the outer periphery of the frame 10 is generally cross-shaped, which not only reduces weight and cost but also provides space for the arrangement of lifting rings and cooling and lubrication pipelines.

[0015] The key point of this application lies in the design of the swing arm adjustment mechanism 40. Specifically, a nut hole is provided on the frame 10, and the bolt push rod 41 forms a threaded fit with the nut hole. When the bolt push rod 41 is rotated, the position of its smooth curved inner end face changes accordingly. The position of the inner end face of the bolt push rod 41 is the extreme position of the swing arm 30 and its upper guide wheel 32 near the end of the feed guide tube 20. By adjusting the bolt push rod 41, the wheel cores of the four guide wheels 32 can be made coplanar, and the connection distance between the common vertical plane and the end of the feed guide tube 20 can be adjusted to the set... The value is calculated as follows: Since a nut cap 42 is provided on the bolt top rod 41, which is located at the inner end far from the bolt top rod 41 and outside the nut hole, the nut cap 42 completely covers the exposed part of the bolt top rod 41. This prevents environmental dust and high temperature and humidity from corroding the threaded connection, effectively avoiding the corrosion of the swing arm adjustment mechanism 40. This ensures that the swing arm adjustment mechanism 40 can be disassembled and assembled smoothly during maintenance. If there is a need to adjust the position of the guide wheel 32, the nut cap 42 can be removed to easily adjust the bolt top rod 41.

[0016] See Figure 1 , 4 5. A nut plate 43 is provided on the other side of the frame 10 opposite to the side of the plate on which the swing arm 30 is set. The nut plate 43 has a nut hole 431 and a threaded section 411 in the middle of the bolt rod 41 to form a threaded engagement. A seal is provided between the nut plate 43 and the contact surface of the frame 10.

[0017] The above solution involves independently setting up a nut plate 43 to connect with the bolt push rod 41. This allows for the installation of a sliding sleeve 44 on the frame 10, which forms a sealed fit with the cylindrical section 412 of the inner part of the bolt push rod 41. The bolt push rod 41, in conjunction with the nut plate 43 and the sliding sleeve 44, allows for displacement adjustment. The sealing ring 60 on the sliding sleeve 44, in its sealed fit with the cylindrical section 412 of the inner part of the bolt push rod 41, prevents contamination and corrosion of the cylindrical section 412 by smoke, dust, and high-temperature moisture.

[0018] As can be seen from the above scheme, only the inner end of the bolt top rod 41 is partially exposed to the production site environment, while the rest is completely sealed by the enclosed environment.

[0019] A locking nut 45 is connected to the threaded section 411 of the bolt push rod 41 on the outer side of the nut plate 43. The outer section of the locking nut 45 has external threads that engage with the internal threads at the cap of the nut cap 42. The outer circumference 451 of the inner section of the locking nut 45 is hexagonal. The locking nut 45 prevents loosening of the mechanism, ensuring that the bolt push rod 41 is stably and reliably maintained in the adjusted design position. The locking nut 45 and the nut plate 43 form a sealed fit. Figure 4The sealing element 70 is positioned between the locking nut 45 and the nut plate 43, further eliminating pathways that could allow dust and high-humidity fumes to intrude. Figure 5 , 6 As shown in Figure 7, the nut plate 43 is fixed to the frame 10 by two bolts on the left and right sides, and a sealing element 80 is provided between the nut plate 43 and the frame 10.

[0020] The nut cap 42 has an open end and a cap top 421 at the other end. The inner circumferential surface 422 of the nut cap 42 is hexagonal, which makes the nut cap 42 easy to disassemble.

Claims

1. A rolling inlet guide, comprising a plate-frame type frame (10), a feed pipe (20) arranged at a through hole in the middle of the frame (10), a swing arm (30) provided on one side plate of the frame (10), the swing arm (30) being in the shape of a folded rod and the bent part being hinged to the frame (10) by a swing arm shaft (31), the inner end of the swing arm (30) being rotatably connected to a guide wheel (32) and the guide wheel (32) being located at one end of the feed pipe (20), and 3 or 4 swing arms (30) being evenly spaced within the circumferential range of the feed pipe (20). The length direction of the arm (30) is consistent with the radial direction of the feed guide tube (20); during the swing of the arm (30) around the arm shaft (31), the coplanar plane of the wheel cores of each guide wheel (32) is parallel to and perpendicular to the core of the feed guide tube (20) and the coplanar plane of the arm shaft (31). The frame (10) is provided with an arm adjustment mechanism (40) and a gas spring support mechanism (50). The arm adjustment mechanism (40) and the gas spring support mechanism (50) are located on the same side of the inner and outer arm sections of the arm (30) bounded by the arm shaft (31). The feature is that: The swing arm adjustment mechanism (40) includes a nut hole on the frame (10), a bolt rod (41) and a nut hole forming a threaded fit, the inner end face of the bolt rod (41) is a smooth curved surface, and a nut cap (42) is provided on the outer periphery of the bolt rod (41) which is far from the inner end of the bolt rod (41) and located outside the nut hole.

2. The rolling inlet guide according to claim 1, characterized in that: A nut plate (43) is provided on the other side of the frame (10) opposite to the side of the plate on which the swing arm (30) is set. The nut plate (43) has a nut hole (431) and a threaded section (411) in the middle of the bolt rod (41) to form a threaded fit. A seal is provided between the nut plate (43) and the mating surface of the frame (10).

3. The rolling inlet guide according to claim 2, characterized in that: The frame (10) is provided with a sliding sleeve (44), which forms a sealed fit with the cylindrical section (412) of the inner section of the bolt top rod (41).

4. The rolling inlet guide according to claim 2, characterized in that: A locking nut (45) is connected to the threaded section (411) of the bolt top rod (41) on the outside of the nut plate (43). The outer section of the outer wall of the locking nut (45) has an external thread that engages with the internal thread at the cap of the nut cap (42). The outer periphery (451) of the inner section of the locking nut (45) is hexagonal.

5. The rolling inlet guide according to claim 2, characterized in that: The locking nut (45) and the nut plate (43) form a sealing fit.

6. The rolling inlet guide according to claim 2, characterized in that: The nut cap (42) has an open end and a cap top (421) at the other end. The inner circumference (422) of the nut cap (42) is hexagonal.

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