A rolling guide and rolling mill for bar and wire rod rolling

Abstract

This application discloses a rolling guide and rolling mill for bar and wire rod rolling, including a housing, multiple guide wheels and multiple profile connecting blocks; the multiple guide wheels are arranged in a ring array around the center of the housing and are movably disposed on the housing, and the multiple guide wheels are used for passing bar and wire rod; each profile connecting block is located outside the guide wheel and is detachably connected to the housing, and the side of the profile connecting block away from the housing is a positioning profile that is installed in conjunction with the rolling mill stand. This application has the advantages of being easy to disassemble as a whole and not damaging the guide structure during disassembly.

Description

Technical Field

[0001] This application relates to the field of metal rolling technology, and more particularly to a rolling guide and rolling mill for rolling bar and wire rod. Background Technology

[0002] Currently, the split-type three-roll rolling guide equipment for rolling ferrous metals, non-ferrous rare metals, and other bars and wires is difficult to replace during use and is prone to jamming and inability to be disassembled normally. If destructive disassembly (flame cutting or drilling) is used, the guide structure and its connecting parts will be damaged, which may cause the parts to become unusable. This will significantly increase the user's spare parts costs and the time required for manual replacement of spare parts. In severe cases, it will directly affect the output of finished products rolled from bars and wires. Utility Model Content

[0003] The main objective of this application is to provide a rolling guide and rolling mill for bar and wire rod rolling, aiming to solve the technical problem that the existing rolling guides for bar and wire rod rolling are easily damaged during disassembly.

[0004] To achieve the above objectives, this application provides a rolling guide for bar and wire rod rolling, including a housing, multiple guide wheels, and multiple profile connecting blocks; the multiple guide wheels are arranged in a circular array around the center of the housing and are movably disposed on the housing, and the multiple guide wheels are used for the passage of bar and wire rod; each profile connecting block is located outside the guide wheel and is detachably connected to the housing, and the side of the profile connecting block away from the housing is a positioning profile that is installed in conjunction with the mill stand.

[0005] Optionally, the shell and the surface connecting block are connected by a threaded connection of at least two locating pins, the bottom surface of the surface connecting block is provided with a blind hole that mates with the locating pins, and a plurality of first screws are also threadedly connected between the surface connecting block and the shell.

[0006] Optionally, multiple support arms are detachably connected inside the housing, and the support arms are used to movably connect to the corresponding guide wheels.

[0007] Optionally, a support shaft is provided through the support arm and the housing, and the large end of the support shaft is detachably connected to the housing by multiple second screws.

[0008] Optionally, a bushing is fitted onto the small end of the support shaft, and the bushing is embedded inside the housing.

[0009] Optionally, the support arm is provided with a mounting hole that mates with the bracket shaft, and mating surfaces are provided on both sides of the mounting hole that respectively contact the positioning post and the end face of the bushing of the bracket shaft; wherein, the positioning post is integrally connected to the large end of the bracket shaft, and the diameter of the positioning post is between the diameter of the large end of the bracket shaft and the diameter of the shaft of the bracket shaft.

[0010] Optionally, a spindle washer is fitted on the support shaft between the large end of the support shaft and the housing, and the second screws all pass through the spindle washer.

[0011] Optionally, an oil passage is provided at the inner core of the support shaft, one end of which extends to the large end of the support shaft. A third screw is threadedly connected to the large end of the support shaft to block the oil passage. An oil nozzle is also eccentrically provided at the large end of the support shaft. A first oil passage is provided inside the support shaft to connect the oil passage and the oil nozzle. Multiple second oil passages are also provided inside the support shaft to connect the oil passage and the interior of the housing.

[0012] Optionally, three guide wheels are provided.

[0013] To achieve the above objectives, this application also provides a rolling mill, including the aforementioned rolling guide for bar and wire rod rolling.

[0014] The beneficial effects that this application can achieve are as follows: This application includes a housing, multiple guide wheels, and multiple profiled connecting blocks; the multiple guide wheels are arranged in a circular array around the center of the housing and are movably mounted on the housing, and the multiple guide wheels are used to pass bar and wire rods; each profiled connecting block is located outside the guide wheel and is detachably connected to the housing, and the side of the profiled connecting block away from the housing is a positioning profile that is installed in conjunction with the rolling mill stand. Based on the guide structure of this application, when the rolling guide needs to be assembled on the mill stand, it can be installed by aligning the positioning profiles of multiple profile connecting blocks with the mounting surfaces on the mill stand, and then locking the pressure plate on the mill stand to complete the installation. When the rolling guide needs to be removed from the mill stand, the pressure plate on the mill stand can be released to complete the removal of the rolling guide. Therefore, without damaging the original structure, the guide of this application can add profile connecting blocks with positioning profiles to the corresponding empty positions of the guide shell, thereby achieving a detachable connection with the mill stand. Disassembly does not require destructive disassembly operations, reducing the risk of damage to the guide, improving service life, and the installation and removal of the guide with the profile connecting blocks are convenient and quick. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0016] Figure 1 This is a schematic diagram (partially exploded) of a rolling guide for bar and wire rolling according to an embodiment of this application. Figure 2 This is a schematic diagram of the shell structure in an embodiment of this application; Figure 3This is a schematic diagram of the surface connection block in an embodiment of this application; Figure 4 This is a schematic diagram of the internal structure of a rolling guide for bar and wire rolling according to an embodiment of this application; Figure 5 This is a schematic diagram of the support arm in an embodiment of this application; Figure 6 This is a schematic diagram of the support shaft in an embodiment of this application; Figure 7 This is a schematic diagram of the bushing structure in an embodiment of this application; Figure 8 This is a schematic diagram of the mandrel washer structure in an embodiment of this application.

[0017] Figure label: 110-Housing, 120-Guide wheel, 130-Molded connecting block, 131-Positioning molded surface, 140-Positioning pin, 150-First screw, 160-Support arm, 161-Mounting hole, 162-Mating surface, 170-Bracket shaft, 171-Oil passage, 172-First oil passage, 173-Second oil passage, 174-Positioning pin, 180-Second screw, 190-Busset, 210-Spindle washer, 220-Third screw, 230-Oil nozzle.

[0018] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0020] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0021] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0022] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0023] Example 1 Reference Figures 1-8 This embodiment provides a rolling guide for bar and wire rod rolling, including a housing 110, a plurality of guide wheels 120 and a plurality of profile connecting blocks 130; the plurality of guide wheels 120 are arranged in a circular array around the center of the housing 110 and are movably disposed on the housing 110, and the plurality of guide wheels 120 are used for the passage of bar and wire rod; each profile connecting block 130 is located outside the guide wheel 120 and is detachably connected to the housing 110, and the side of the profile connecting block 130 away from the housing 110 is a positioning profile 131 that is installed in conjunction with the mill stand.

[0024] In this embodiment, when the rolling guide needs to be installed on the mill stand, it can be installed by aligning the positioning surfaces 131 of multiple profile connecting blocks 130 with the mounting surfaces on the mill stand, and then locking the pressure plate on the mill stand to complete the installation. When the rolling guide needs to be removed from the mill stand, the pressure plate on the mill stand can be released to complete the removal of the rolling guide. Therefore, without damaging the original structure, the guide of this application can add profile connecting blocks 130 with positioning surfaces 131 to the empty positions of the guide housing 110, thereby achieving a detachable connection with the mill stand. Disassembly does not require destructive disassembly operations, reducing the risk of damage to the guide, improving service life, and the installation and removal of the guide with the profile connecting blocks 130 are convenient and quick.

[0025] It should be noted that the positioning surface 131 has a trapezoidal protrusion, which can be quickly assembled and connected with the trapezoidal groove on the rolling mill stand. There are three guide rollers 120, thus forming a three-roll rolling guide structure. The profile connecting block 130 is positioned and matched with the guide shaft hole stop, making assembly and disassembly simpler and more time-saving, while also meeting the requirement that the three-roll rolling guide needs to rotate 120°.

[0026] As an optional implementation, at least two locating pins 140 are threadedly connected to the side of the housing 110 that is connected to the profile connecting block 130. The bottom surface of the profile connecting block 130 (i.e. the side away from the locating profile 131) is provided with blind holes that cooperate with the locating pins 140. A plurality of first screws 150 are also threadedly connected between the profile connecting block 130 and the housing 110.

[0027] In this embodiment, when assembling the profiled connecting block 130 on the housing 110, the two locating pins 140 (which can be hardened internal thread cylindrical pins) are gently pressed into the corresponding pin holes on the housing 110. The blind hole on the profiled connecting block 130 is aligned with the locating pin 140 and gently pressed in, so that the bottom plane of the profiled connecting block 130 coincides with the mating plane of the housing 110 without gap, thereby ensuring the accurate position of the profiled connecting block 130. Then, the first screw 150 (which can be four internal hexagon head screws) is placed into the countersunk hole on the profiled connecting block 130, aligned with the four threaded holes of the housing 110, and the four internal hexagon head screws are tightened diagonally with an internal hexagon wrench until there is no looseness. The profiled connecting blocks 130 at the other two locations are installed in the same manner. The operation is convenient and quick.

[0028] As an optional implementation, a plurality of support arms 160 are detachably connected inside the housing 110. The support arms 160 are used to movably connect to the corresponding guide wheels 120, thereby facilitating the assembly and disassembly of the support arms 160.

[0029] As an optional implementation, a bracket shaft 170 is provided through between the support arm 160 and the housing 110, and the large end of the bracket shaft 170 is detachably connected to the housing 110 by a plurality of second screws 180.

[0030] In this embodiment, since the parts where installation and disassembly are difficult to occur in the use of existing guides are mainly located at the connection and mating of the support arm 160 and the housing 110, and the support arm 160 cannot be easily placed or removed from the housing 110, the support arm 160 can be positioned and installed in the housing 110 by the bracket shaft 170, and then the bracket shaft 170 is fixed to the housing 110 by the second screw 180, thereby indirectly fixing the support arm 160 to the housing 110, which also facilitates disassembly.

[0031] As an optional implementation, the small end of the support shaft 170 is fitted with a bushing 190, which is embedded in the housing 110. During assembly, the bushing 190 can be slowly pressed into the housing by interference fit, and the fit is seamless, ensuring that the support shaft 170 will not loosen or fall off, thus preventing the support shaft 170 from shaking.

[0032] As an optional implementation, the support arm 160 is provided with a mounting hole 161 that mates with the bracket shaft 170. On both sides of the mounting hole 161, there are mating surfaces 162 that respectively contact the positioning post 174 of the bracket shaft 170 and the end face of the bushing 190. The positioning post 174 is integrally connected to the large end of the bracket shaft 170, and the diameter of the positioning post 174 is between the diameter of the large end of the bracket shaft 170 and the diameter of the shaft of the bracket shaft 170.

[0033] In this embodiment, the bracket shaft 170 extends into a portion of the mounting hole 161 of the support arm 160 via the positioning pin 174, while the bushing 190 also extends into a portion of the other end of the mounting hole 161 of the support arm 160, thereby improving the reliability of the fixing structure of the support arm 160 and effectively reducing the shaking of the guide wheel 120 when guiding the bar wire.

[0034] As an optional implementation, a spindle washer 210 is fitted on the support shaft 170 between the large end of the support shaft 170 and the housing 110, and the second screws 180 all pass through the spindle washer 210.

[0035] In this embodiment, due to prolonged use of the three-roll rolling guide, wear inevitably occurs on the mating surfaces 162 of the support arm 160 and the bracket shaft 170, as well as the mating surfaces 162 of the support arm 160 and the bushing 190, resulting in a certain axial clearance. Significant axial movement of the support arm 160 directly leads to axial movement of the guide rollers 120 during the rolling process. This deforms the die formed by the three sets of guide rollers 120, making it impossible to accurately and stably clamp the bar and wire rod, resulting in defects such as wavy lines and bending in the finished steel product. In severe cases, it can cause serious accidents such as steel pile-up and line shutdown for maintenance. Therefore, a mandrel shim 210 is added. When the support arm 160 exhibits axial movement, the mandrel shim 210 can be removed. Based on the amount of axial movement of the support arm 160, a certain thickness of the mandrel shim 210 is ground off on both sides using a surface grinder, and then reassembled to press the support arm 160 firmly, ensuring that the support arm 160 has no axial movement and can continue to be used normally. This process is repeated until the mandrel shim 210 can no longer be fitted with the thickness, which also serves as a reminder to the user that the part has reached the replacement time.

[0036] As an optional implementation, an oil passage 171 is provided at the inner core of the support shaft 170. One end of the oil passage 171 extends to the large end of the support shaft 170. A third screw 220 is threadedly connected to the large end of the support shaft 170 to seal the oil passage 171. An oil nozzle 230 is also eccentrically provided at the large end of the support shaft 170. A first oil passage 172 is provided inside the support shaft 170 to connect the oil passage 171 and the oil nozzle 230. Multiple second oil passages 173 are also provided inside the support shaft 170 to connect the oil passage 171 to the interior of the housing 110. Lubricating oil can be injected into the housing 110 through the oil nozzle 230, the first oil passage 172, the oil passage 171, and the second oil passages 173, thereby reducing wear.

[0037] In summary, to address the issues of difficulty in disassembling the support arm 160 and the risk of damage to the guide components, based on the overall structure of this embodiment, when assembling the support arm 160, the bushing 190 is first slowly pressed into the housing 110 through interference fit, ensuring that it overlaps without gaps and preventing it from loosening or falling off. The mandrel washer 210 fits onto the large end of the bracket shaft 170. The support arm 160 is placed inside the housing 110, with the mounting hole 161 of the support arm 160 aligned with the hole in the housing 110. The bracket shaft 170 is slowly pushed into the housing 110 from one side, passing through the support arm 160 and into the inner hole of the small end copper sleeve. The plane of the mandrel washer 210 coincides with the plane of the housing 110 without gap. Then, four hexagonal head bolts with full threads (i.e., the second screw 180) are screwed into the threaded holes of the housing 110 through the four mounting holes 161 on the bracket shaft 170 and tightened. Subsequently, one grease nipple 230 (a straight-through pressure grease nipple 230 can be used) and one third screw 220 (an internal hexagonal flat-end set screw can be used) are screwed into the threaded holes of the housing 110 and tightened. The other two support arms 160 are installed in the same manner to complete the assembly.

[0038] When the support arm 160 needs to be replaced, unscrew the four fully threaded hexagonal head bolts and one internal hexagonal set screw (if the straight-through grease nipple 230 is not damaged, disassembly is not necessary, saving time and reducing disassembly damage). A puller or a long screw can be used to screw into the mounting hole 161 where the internal hexagonal set screw is located and tighten it. By intermittently impacting the tool outward from the housing 110, the bracket shaft 170 can be continuously pulled out of the housing 110 and the support arm 160. Alternatively, a copper or aluminum rod of appropriate diameter can be used from the bushing 190 side to continuously tap the bracket shaft 170, continuously causing the bracket shaft 170 to separate from the housing 110 and the support arm 160. Then, the profile connecting block 130 can be removed to easily take out the support arm 160, completing the disassembly.

[0039] Example 2 To achieve the above objectives, this embodiment also provides a rolling mill, including a rolling guide for bar and wire rod rolling as described in the above embodiment, which is not easily damaged during disassembly, thereby improving the overall service life of the rolling mill. The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A rolling guide for bar and wire rolling, characterized in that, include: case; Multiple guide wheels are arranged in a circular array around the center of the housing and are movably mounted on the housing. The multiple guide wheels are used to pass through bar wires. Multiple profiled connecting blocks, each of which is located outside the guide wheel and detachably connected to the housing, wherein the side of the profiled connecting block away from the housing is a positioning profile that is fitted to the rolling mill stand.

2. A rolling guide for bar and wire rolling as described in claim 1, characterized in that, The shell is connected to the shaped surface connecting block by a threaded connection of at least two positioning pins. The bottom surface of the shaped surface connecting block is provided with a blind hole that mates with the positioning pins. The shaped surface connecting block and the shell are also connected by a plurality of first screws.

3. A rolling guide for bar and wire rolling as described in claim 1 or 2, characterized in that, The housing is detachably connected to multiple support arms, which are used to movably connect to the corresponding guide wheels.

4. A rolling guide for bar and wire rolling as described in claim 3, characterized in that, A bracket shaft is provided through the support arm and the housing, and the large end of the bracket shaft is detachably connected to the housing by a plurality of second screws.

5. A rolling guide for bar and wire rolling as described in claim 4, characterized in that, The small end of the support shaft is fitted with a bushing, which is embedded in the housing.

6. A rolling guide for bar and wire rolling as described in claim 5, characterized in that, The support arm has a mounting hole that mates with the bracket shaft. On both sides of the mounting hole are mating surfaces that respectively contact the positioning post of the bracket shaft and the end face of the bushing. The positioning post is integrally connected to the large end of the bracket shaft, and the diameter of the positioning post is between the diameter of the large end of the bracket shaft and the diameter of the shaft of the bracket shaft.

7. A rolling guide for bar and wire rolling as described in claim 4, characterized in that, A spindle washer is fitted on the support shaft between the large end of the support shaft and the housing, and the second screws all pass through the spindle washer.

8. A rolling guide for bar and wire rolling as described in claim 4, characterized in that, An oil passage is provided at the inner core of the bracket shaft. One end of the oil passage extends to the large end of the bracket shaft. A third screw is threadedly connected to the large end of the bracket shaft to block the oil passage. An oil nozzle is also eccentrically provided at the large end of the bracket shaft. A first oil passage is provided inside the bracket shaft to connect the oil passage and the oil nozzle. A plurality of second oil passages are also provided inside the bracket shaft to connect the oil passage and the interior of the housing.

9. A rolling guide for bar and wire rolling as described in claim 1, characterized in that, There are three guide wheels.

10. A rolling mill, characterized in that, Includes a rolling guide for bar and wire rolling as described in any one of claims 1-9.

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