High efficient switchable asymmetric cold rolling mill
By introducing extended grooves and a gas-liquid auxiliary mechanism into the six-roll cold rolling mill, the problems of cumbersome roll changing process and insufficient thickness control have been solved, achieving flexible support and precise thickness control of the work rolls, and improving the roll changing efficiency and sheet material accuracy of the cold rolling mill.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- JIANGSU JIANGNAN COLD-ROLLED SHEET CO LTD
- Filing Date
- 2026-04-13
- Publication Date
- 2026-07-24
AI Technical Summary
The existing six-roll cold rolling mill has complicated and time-consuming roll changing procedures. The gap between the work roll bearing housing and the arch liner is difficult to control, which affects the thickness accuracy of the plate. In addition, the lack of feedforward adjustment leads to excessive thickness at the beginning and end of the rolling process.
Design a high-efficiency switchable asymmetric cold rolling mill. The mill uses an extended groove in the main base to compensate for the thermal expansion of the components. Combined with a gas-liquid auxiliary mechanism, it achieves efficient cooling and lubrication of the oil-bearing unit. The pneumatic support unit completes the flexible support and locking positioning of the roll system. The locking guide mechanism achieves positioning retention and thickness control.
It effectively avoids component jamming during rolling, achieves flexible support and axial positioning of the work roll, buffers the initial rolling pressure impact, and ensures the accuracy of plate thickness and rolling efficiency.
Smart Images
Figure CN122007165B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of cold rolling mill technology, and in particular to a high-efficiency switchable asymmetric cold rolling mill. Background Technology
[0002] With its high roll system rigidity and strong strip shape control capabilities, the six-roll cold rolling mill has become the core equipment in the production of high-precision thin strip. It is usually configured with a three-layer six-roll structure of bearing roll, intermediate roll and work roll, and the installation and lifting adjustment of each roll are realized by relying on the roll seat structure on the base. At the same time, the rolling pressure is applied in conjunction with the pressing mechanism to meet the rolling process requirements of thin strip.
[0003] However, existing six-roll cold rolling mills still have many technical defects in actual production applications, making them difficult to adapt to the requirements of high-precision and high-efficiency rolling production:
[0004] Firstly, traditional roll changing requires first removing the intermediate roll and then removing the work roll, which is a cumbersome and time-consuming process.
[0005] Secondly, when pushing the new work roll into the mill stand window, due to long-term wear or thermal expansion between the work roll bearing housing and the stand liner, the clearance fit is difficult to control. If the clearance is too small, the pushing power will be insufficient or even jammed; if the clearance is too large, the roll system will not be firmly positioned during rolling, affecting the thickness accuracy of the plate.
[0006] Third, traditional thickness control relies on the feedback adjustment of the hydraulic pressing system, which lacks the feedforward compensation for the actual axial levelness and radial runout after the work roll is pushed in, resulting in serious thickness deviations at the beginning and end; when the pressing mechanism is initially opened and pressed down, there is an impact on the roller body. Summary of the Invention
[0007] The present invention aims to solve the above-mentioned defects and provide a high-efficiency switchable asymmetric cold rolling mill.
[0008] To overcome the defects in the prior art, the technical solution adopted by the present invention to solve its technical problem is: a high-efficiency switchable asymmetric cold rolling mill, including a main base, which has two symmetrically distributed roll seat windows inside. Inside the main base, an upper bearing roll, an upper intermediate roll, an upper work roll, a lower work roll, a lower intermediate roll and a lower bearing roll are arranged in sequence from top to bottom along the vertical direction and on the same plane. The roll mounting seats rotatably connected at both ends of the upper bearing roll, the upper intermediate roll, the lower intermediate roll and the lower bearing roll are all vertically slidably connected inside the roll seat windows. The inner walls of the two roll seat windows are symmetrically constructed with extended grooves.
[0009] The pneumatic-hydraulic auxiliary mechanism includes an oil-bearing unit, a pneumatic support unit, an oil-gas control unit for regulating the oil-gas pressure and flow direction of the oil-bearing unit and the pneumatic support unit, and an external oil-gas supply unit for supplying oil-gas to the oil-gas control unit. The oil-bearing unit is rotatably mounted at both ends of the upper and lower work rolls, providing mounting support, oil cooling and lubrication, and auxiliary distance measurement functions for the work rolls. The pneumatic support unit is respectively mounted at the roll mounting points at the ends of the oil-bearing unit and the upper and lower intermediate rolls. Between the mounting bases, flexible support and locking positioning are achieved for the upper intermediate roller and upper bearing roller, as well as axial positioning of the work roller. The oil bearing units are connected in series through pipelines, and the oil-gas control unit is connected to the first and last oil bearing units through pipelines. The pneumatic support units are connected in series through pipelines, and the oil-gas control unit is connected to the first and last pneumatic support units through pipelines. The oil-gas supply unit is connected to the oil-gas control unit through pipelines.
[0010] There are four locking guide mechanisms in total, arranged in groups of two. Each group of locking guide mechanisms is symmetrically arranged on the main body base. They are used to maintain the positioning of the oil bearing unit during the rolling process, assist in disassembly during the roll changing process, assist in positioning and locking the pneumatic support unit, and adjust the distance between the upper and lower work rolls.
[0011] The main base is also equipped with a lifting mechanism for driving the locking guide mechanism to move vertically up and down, and a pressing mechanism for applying downward rolling pressure to the upper bearing roll.
[0012] In a further improvement, the locking guide mechanism includes a locking housing that is slidably mounted on the main body base in a vertical direction. A partition guide frame is coaxially mounted on the inner wall of the locking housing. A main body slider capable of piston movement is mounted inside the partition guide frame. The main body slider extends through a preset hole on the locking housing to the outside of the locking housing and connects to an isosceles trapezoidal column. A movable piston is mounted radially on the main body slider and can move within the locking housing. A distance measuring sensor is axially mounted on the inner wall of the locking housing. An oil supply port on the locking housing is connected to an oil supply system via a pipeline.
[0013] In a further improvement, the oil-bearing unit includes a rectangular base with guide slopes at all four corners. The base has a lubricating oil cavity for storing and circulating oil, as well as a fine hole communicating with the lubricating oil cavity. The base has two oil seat connection ports communicating with the lubricating oil cavity. The guide slopes are adapted to fit the slope of the isosceles trapezoidal prism.
[0014] In a further improvement, the oil and gas control unit includes two identical and interconnected regulating blocks A and B. Both regulating blocks A and B have a large-diameter cavity and small-diameter cavities located on either side of the large-diameter cavity and connected to it. A regulating piston is installed within the large-diameter cavity, and the regulating piston can only move within the range of the large-diameter cavity. Both regulating blocks A and B are equipped with a pressure sensor to detect the pressure value in one of the small-diameter cavities. Both regulating blocks A and B also have one and two gas pipe connections connected to the small-diameter cavity. Furthermore, both regulating blocks A and B are equipped with an oil pressure sensor to detect the oil pressure value in the other small-diameter cavity. Both regulating blocks A and B also have one and two oil pipe connections connected to the small-diameter cavity.
[0015] In a further improvement, the pneumatic support unit includes a support box, which has an annular cavity and a central cavity at the center of the annular cavity. The central cavity is open at the top and closed at the bottom. An inner frame with a matching structure is inserted into the central cavity. The inner frame has at least two guide protrusions on its outer periphery and a bearing plate at its upper end. The bearing plate is used to connect with the roll mounting seats at the ends of the upper and lower intermediate rolls. The guide protrusions are embedded in guide windows opened between the central cavity and the annular cavity. The support box has two pneumatic connection ports that communicate with the annular cavity. The outer periphery of the support box also has a preset window for the locking plate to extend radially. A limiting plate is set at one end of the locking plate inside the annular cavity. A positioning insert with a triangular cross-section is set below the support box. The positioning insert can be embedded in a positioning groove opened on the oil bearing unit.
[0016] The beneficial effects of this invention are as follows: the extended groove of the main base in this design can compensate for the thermal expansion displacement of the components, effectively avoiding the problems of component jamming and jamming during rolling; the gas-liquid auxiliary mechanism achieves efficient cooling and lubrication of the oil-bearing unit through closed-loop oil circulation, while the pneumatic support unit completes the flexible support of the roll system, roll changing locking positioning and axial positioning of the work roll, and can also buffer the initial rolling pressure impact; the locking guide mechanism can realize the positioning and holding of the oil-bearing unit, roll changing auxiliary guidance and oil-bearing unit spacing adjustment, realize the feedforward precise control of rolling thickness and avoid radial movement of the work roll. Attached Figure Description
[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0018] Figure 1 This is a schematic diagram of the left-side structure of the present invention;
[0019] Figure 2 This is a schematic diagram of the main structure of the present invention;
[0020] Figure 3 This is a schematic diagram of the main structure of the oil-bearing unit in this invention;
[0021] Figure 4 This is a schematic diagram of the main cross-sectional structure of the oil-bearing unit in this invention;
[0022] Figure 5 This is a schematic diagram of the main view cross-sectional structure of the oil and gas control unit in this invention;
[0023] Figure 6 This is a schematic diagram of the main structure of the pneumatic support unit in this invention;
[0024] Figure 7 yes Figure 6 Schematic diagram of the DD cross-sectional structure;
[0025] Figure 8 This is a schematic diagram of the front cross-sectional structure of the pneumatic support unit in this invention;
[0026] Figure 9 This is a schematic diagram of the front cross-sectional structure of the locking guide mechanism in this invention;
[0027] In the figure, 1-gas-liquid auxiliary mechanism, 2-main body base, 3-pressing mechanism, 4-lifting mechanism, 5-locking guide mechanism, 6-upper bearing roller, 7-upper intermediate roller, 8-upper working roller, 9-lower working roller, 10-lower intermediate roller, 11-lower bearing roller;
[0028] 101-Pneumatic support unit, 102-Oil bearing unit, 103-Oil and gas control unit;
[0029] 201-Roller seat window, 202-Extended groove, 203-Locking hole;
[0030] 501-Isosceles trapezoidal column, 502-Main slider, 503-Moving piston, 504-Separating guide frame, 505-Distance sensor, 506-Locking housing, 507-Oil supply connection port;
[0031] 1011-Support box, 1012-Bearing plate, 1013-Pneumatic connection port, 1014-Positioning insert, 1015-Annular cavity, 1016-Inner frame, 1017-Locking plate, 1018-Guide protrusion, 1019-Central cavity, 10110-Limiting plate;
[0032] 1021-Guide slope, 1022-Seat body, 1023-Oil seat connection port, 1024-Fine hole, 1025-Positioning groove, 1026-Lubricating oil cavity;
[0033] 1031-Adjusting block A, 1032-Adjusting block B, 1033-Oil pipe connection port 1, 1034-Oil pipe connection port 2, 1035-Oil pressure sensor, 1036-Large diameter cavity, 1037-Control piston, 1038-Small diameter cavity, 1039-Air pressure sensor, 10310-Air pipe connection port 1, 10311-Air pipe connection port 2. Detailed Implementation
[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0035] refer to Figure 1 and Figure 2 This embodiment provides a high-efficiency switchable asymmetric cold rolling mill, including a main base 2, which has two symmetrically distributed roll seat windows 201 inside. The roll seat windows 201 are used to accommodate the roll mounting seats at the ends of each roll. Inside the main base 201, along the vertical direction and on the same plane, from top to bottom, are arranged an upper support roll 6, an upper intermediate roll 7, an upper work roll 8, a lower work roll 9, a lower intermediate roll 10, and a lower support roll 11. The roll mounting seats at both ends of the upper support roll 6, the upper intermediate roll 7, the lower intermediate roll 10, and the lower support roll 11 are all vertically slidably connected within the roll seat windows 201, thereby realizing the vertical lifting and lowering adjustment of the rolls. The inner walls of the two roll seat windows 201 are symmetrically constructed with expansion grooves 202. The expansion grooves 202 can compensate for the thermal expansion displacement of the oil support unit 102 under rolling conditions, effectively avoiding the problem of components jamming or stuck due to expansion under hot conditions. The expansion grooves 202 are located in the installation area of the work rolls, wherein the upper work roll 8 and the lower work roll 9 can adopt an asymmetric structure.
[0036] The gas-liquid auxiliary mechanism 1 includes an oil-bearing unit 102, a pneumatic support unit 101, an oil-gas regulation unit 103, and an external oil-gas supply unit. The oil-bearing unit 102 is rotatably mounted at both ends of the upper work roll 8 and the lower work roll 9, providing mounting support, oil cooling and lubrication, and auxiliary distance measurement for the work rolls. The pneumatic support unit 101 is positioned between the oil-bearing unit 102 and the roll mounting seats at the ends of the upper intermediate roll 7 and the lower intermediate roll 10, providing flexible support for the upper intermediate roll 7 and the upper bearing roll 6, locking and positioning during roll changes, and axial positioning of the work rolls. The oil-gas regulation unit 103 regulates the oil-gas pressure and flow direction of the oil-bearing unit 102 and the pneumatic support unit 101. The oil-gas supply unit provides oil-gas delivery to the oil-gas regulation unit 103. The oil-bearing units 102 are connected in series via pipelines, and the oil-gas control unit 103 is connected to the first and last oil-bearing units 102 via pipelines to form a closed-loop oil circulation, realizing the circulation, transportation, lubrication, and cooling functions of the oil; the pneumatic support units 101 are connected in series via pipelines, and the oil-gas control unit 103 is connected to the first and last pneumatic support units 101 via pipelines, and the oil-gas supply unit is connected to the oil-gas control unit 103 via pipelines. Through the control of oil-gas parameters, the pneumatic support unit 101 can achieve flexible support, locking and positioning during roll changing, and cooling functions, as well as the oil-bearing units 102 can provide installation support, oil cooling and lubrication, and auxiliary distance measurement functions for the work rolls;
[0037] There are four locking guide mechanisms 5 in total, with two in a group. Each group of locking guide mechanisms 5 is symmetrically arranged on the main body base 2. They are used to maintain the positioning of the oil bearing unit 102 during the rolling process, assist in disassembly during the roll changing process, and assist in positioning and locking the pneumatic support unit 101. At the same time, the spacing between the oil bearing units 102 can be adjusted by the extension of the isosceles trapezoidal column 501 to control the rolling thickness of the plate.
[0038] The main base 2 is also equipped with a lifting mechanism 4 and a pressing mechanism 3. The lifting mechanism 4 is used to drive the locking guide mechanism 5 to perform vertical lifting and lowering movements, so as to realize the vertical position adjustment of the locking guide mechanism 5. The pressing mechanism 3 is used to apply downward rolling pressure to the upper bearing roller 6 to meet the pressure requirements of plate rolling.
[0039] In a specific embodiment, refer to Figure 9The locking guide mechanism 5 includes a locking housing 506 slidably mounted on the main body base 2 in a vertical direction. A partition guide frame 504 is coaxially mounted on the inner wall of the locking housing 506. A main body slider 502 capable of piston-like movement is mounted within the partition guide frame 504. The main body slider 502 extends through a pre-drilled hole in the locking housing 506 to the outside of the locking housing 506 and connects to an isosceles trapezoidal column 501. A movable piston 503 is radially mounted on the main body slider 502, and the movable piston 503 can move within the locking housing 506. A distance sensor 505 is axially mounted on the inner wall of the locking housing 506 for detecting the main body. The actual displacement of the slider 502 allows for fine adjustment of the position of the isosceles trapezoidal column 501. The oil supply port 507 on the locking housing 506 is connected to the oil supply system via a pipeline. The oil supply system injects oil into the locking housing 506, and the oil pressure drives the moving piston 503 to move synchronously with the main slider 502. The isosceles trapezoidal column 501 in the two symmetrically arranged locking guide mechanisms 5 adjusts the distance between the two oil carrying units 102, thereby adjusting the rolling distance between the upper work roll 8 and the lower work roll 9. At the same time, the end of the main slider 502 can also limit the oil carrying unit 102, effectively preventing the work roll from moving radially.
[0040] For specific embodiments, please refer to Figure 3 and Figure 4 The oil carrying unit 102 includes a rectangular base 1022. Guide slopes 1021 are formed at each of the four corners of the base 1022. The base 1022 has an internal lubricating oil cavity 1026 for storing and circulating oil, and a fine hole 1024 communicating with the lubricating oil cavity 1026. Lubricating oil is output through the fine hole 1024 and onto the guide slopes 1021. The base 1022 has two connections to the lubricating oil cavity 1026. The connected oil seat connection port 1023 serves as the input and output channel for oil. When the oil circulates in the lubricating oil chamber 1026, it can cool the oil carrying unit 102 and the corresponding working roller. The guide inclined surface 1021 is adapted to fit the inclined surface of the isosceles trapezoidal column 501. The oil can enter the mating surface between the two through the fine hole 1024 for lubrication. The positioning and holding of the oil carrying unit 102 can be achieved by the abutting action of the isosceles trapezoidal column 501.
[0041] For specific embodiments, please refer to Figure 5The oil and gas control unit 103 includes two identical and interconnected adjustment blocks A1031 and B1032. Both adjustment blocks A1031 and B1032 have a large-diameter cavity 1036 and small-diameter cavities 1038 located on either side of and communicating with the large-diameter cavity 1036. A control piston 1037 is installed within the large-diameter cavity 1036, and this control piston 1037 can only move within the range of the large-diameter cavity 1036. Both adjustment blocks A1031 and B1032 are equipped with pressure sensors 1039 for detecting pressure in one of the small-diameter cavities 1038. The regulating blocks A1031 and B1032 are equipped with air pipe connection port 10310 and air pipe connection port 10311, which are connected to the small diameter cavity 1038, to realize the circulation and pressurization control of airflow. The regulating blocks A1031 and B1032 are also equipped with oil pressure sensors 1035 to detect the oil pressure value in another small diameter cavity 1038. The regulating blocks A1031 and B1032 are also equipped with oil pipe connection port 1033 and oil pipe connection port 1034, which are connected to the small diameter cavity 1038, to realize the circulation cooling and pressurization control of oil.
[0042] For specific embodiments, please refer to Figure 6 , Figure 7 and Figure 8The pneumatic support unit 101 includes a support box 1011. The support box 1011 has an annular cavity 1015 and a central cavity 1019 located in the center of the annular cavity 1015. The central cavity 1019 has an open top and a closed bottom. An inner frame 1016 with a matching structure is inserted into the central cavity 1019. The inner frame 1016 has at least two guide protrusions 1018 on its outer periphery and a bearing plate 1012 at its upper end. The bearing plate 1012 is connected to the roll mounting seats at the ends of the upper intermediate roll 7 and the lower intermediate roll 10. The guide protrusions 1018 are embedded in the guide openings between the central cavity 1019 and the annular cavity 1015. The support box 1012 is directionally and restrictively moved into the window to prevent the inner frame 1016 from detaching from the central cavity 1019. The support box 1011 is provided with two pneumatic connection ports 1013 that communicate with the annular cavity 1015. The outer circumferential surface of the support box 1011 is also provided with a preset window for the locking plate 1017 to extend radially. A limiting plate 10110 is provided at one end of the locking plate 1017 inside the annular cavity 1015. Air is input into the annular cavity 1015 through the pneumatic connection ports 1013. The increased air pressure pushes the locking plate 1017 to extend out of the preset window on the outer circumferential surface of the support box 1011 and insert it into the locking hole 203 on the inner wall of the roller seat window 201. Specifically, when the locking guide mechanism 5 moves the oil-bearing unit 102 upward to the preset position, the locking plate 1017 completes the insertion action. At this time, the pneumatic support unit 101 can provide fixed-point support for the upper bearing roller 6 and the upper intermediate roller 7, reserving operating space for loading and unloading the work roller. When it is first opened, when air is continuously filled into the annular cavity 1015, it can drive the bearing plate 1012 to float slightly upward, which can buffer the impact generated when the pressing mechanism 3 is first opened and pressed down. A positioning insert 1014 with a triangular cross-section is provided below the support box 1011. The positioning insert 1014 can be embedded in the positioning groove 1025 opened on the oil-bearing unit 102 to achieve axial positioning of the work roller.
[0043] Working principle:
[0044] Disassembly process: First, the lifting mechanism 4 drives the locking guide mechanism 5 to move upward to the preset position. The oil and gas control unit 103 cooperates with the oil and gas supply unit, and at the same time, it will drive the oil bearing unit 102 at the end of the upper working roll 8 and the pneumatic support unit 101 between the oil bearing unit 102 and the roll mounting seat at the end of the upper intermediate roll 7 to move upward together. When the pneumatic support unit 101 moves to the preset position, the air pressure in its internal annular cavity 1015 increases, pushing the locking plate 1017 to extend out from the annular cavity 1015 and insert into the locking hole 203 on the inner wall of the roll seat window 201, thereby realizing the fixed-point support of the upper bearing roll 6 and the upper intermediate roll 7, leaving sufficient operating space for the disassembly of the working roll. After completion, the lower working roll 9 can be removed, and then the upper working roll 8 can be removed to realize the switching of the working roll.
[0045] Installation Process: During the installation of the work roll, the oil and gas control unit 103, in conjunction with the oil and gas supply unit, controls the support plate 1012 to move upward. First, the oil support units 102 at both ends of the lower work roll 9 are placed on the pneumatic support unit 101, which provides flexible support. Then, the support plate 1012 gradually moves downward until the lower work roll 9 contacts the lower intermediate roll 10. At this point, the oil in the locking housing 506 pushes the moving piston 503 and the main slider 502 to move until the inclined surface of the isosceles trapezoidal column 501 is in contact with the guide inclined surface 1021 of the oil support unit 102, so that the lower work roll 9 and the lower intermediate roll 10 remain in contact. After the posture is changed, the pneumatic support unit 101 can be restored to its original state; the guide slope 1021 below the oil carrying unit 102 at the end of the upper working roller 8 is placed on the slope above the isosceles trapezoidal column 501, and the isosceles trapezoidal column 501 provides support for the oil carrying unit 102; the lifting mechanism 4 drives the locking guide mechanism 5 to move upward to the preset position, so that the oil carrying unit 102 above the isosceles trapezoidal column 501 contacts the pneumatic support unit 101, the oil and gas control unit 103 cooperates with the oil and gas supply unit to form a negative pressure in the annular cavity 1015, the locking plate 1017 retracts into the annular cavity 1015, and the pneumatic support unit 101 is unlocked. As the locking guide mechanism 5 moves upward, the inclined surface of the isosceles trapezoidal column 501 disengages from the guide inclined surface 1021 of the oil-bearing unit 102 below it, posing a risk of the lower working roller 9 falling. At this point, the end faces of the two main sliders 502 can limit the oil-bearing units 102 at both ends of the lower working roller 9. Finally, the lifting mechanism 4 drives the locking guide mechanism 5 to move downward until the two inclined surfaces of the isosceles trapezoidal column 501 simultaneously come into contact with the guide inclined surfaces 1021 on the oil-bearing units 102 at both ends of the upper working roller 8 and the lower working roller 9. The combined design of the isosceles trapezoidal column 501 and the guide inclined surfaces 1021 on the oil-bearing unit 102 allows the upper working roller 9 to fall. Roll 8 and lower work roll 9 are always kept in the center, and the radial movement of the work roll can be automatically corrected during the rolling process. When the work roll and the oil support unit 102 are working and generating heat, since the oil support unit 102 does not contact the inner wall of the roll seat window 201, it effectively avoids the difficulty in controlling the fit clearance due to long-term wear or thermal expansion and contraction. At the same time, the distance between the upper work roll 8 and the lower work roll 9 can be controlled and finely adjusted by adjusting the position of the isosceles trapezoidal column 501. The oil pressure is detected to provide feedback on whether the isosceles trapezoidal column 501 and the guide slope 1021 of the oil support unit 102 are in contact, and further detection is made to check whether the work roll is level and whether there is any jumping during operation.
[0046] Cooling steps: The oil and gas supply unit inputs lubricating oil into the oil chamber of regulating block A1031 through oil pipe connection port 1033. The oil is then output from oil pipe connection port 1034 of regulating block A1031 and enters the lubricating oil chamber 1026 of each oil carrying unit 102 in sequence. After completing the heat exchange between the work roll and the oil carrying unit 102, the oil flows into the oil chamber of regulating block B1032 through oil pipe connection port 1033. Finally, it is transported back to the oil and gas supply unit from oil pipe connection port 1034 of regulating block B1032. The cooling of the work roll and the oil carrying unit 102 is achieved through the closed-loop circulation of oil.
[0047] Lubrication process: Firstly, when the oil-gas supply unit is working: The oil-gas supply unit simultaneously injects oil into the oil chambers of regulating blocks A1031 and B1032 through oil pipes connected to ports 1033 and 1034, respectively. The oil is then simultaneously delivered to each lubrication chamber 1026 through oil pipes connected to ports 1034 of regulating block A1031 and 1033 of regulating block B1032, and then through the fine hole 1024 to the contact surface between the guide slope 1021 and the isosceles trapezoidal column 501. This pressurization method achieves lubrication of the contact surface. The second method, when the oil and gas supply unit is not working: pressurize the air chamber of the regulating block, push the regulating piston 1037 to compress the oil chamber, and the oil is squeezed out from the oil pipe connection port 1034 of the regulating block A1031 and the oil pipe connection port 1033 of the regulating block B1032, thus completing the lubrication of the contact surface; this method can also form a uniform oil film between the guide inclined surface 1021 and the inclined surface of the isosceles trapezoidal column 501, which is beneficial to the position movement and spacing adjustment of the working roller, and can also achieve the negative pressure maintenance of the oil carrying unit 102 by expanding the oil chamber by regulating piston 1037 or by the oil and gas supply unit to pump oil from the oil chamber of the regulating block;
[0048] The oil and gas supply unit receives air into its air chamber via a gas pipe connection 10310 of regulating block A1031. The air is then output via a gas pipe connection 10311 of regulating block A1031, sequentially entering the annular cavity 1015 and central cavity 1019 of each pneumatic support unit 101. It then enters its air chamber via a gas pipe connection 10310 of regulating block B1032, and finally returns to the oil and gas supply unit via a gas pipe connection 10311 of regulating block B1032, forming a pressureless air circulation loop. This method can also be used for oil and gas control units. The piston 103 is used for cooling, indirectly cooling the oil circuit. When it is necessary to adjust the movement position of the piston 1037 and the support plate 1012, the oil and gas supply unit connects the air pipe of the adjusting block A1031 to port 10310 and the air pipe of the adjusting block B1032 to port 10311 to perform air filling and air extraction operations on the air chamber of the adjusting block. When filling, the oil chamber of the adjusting block is pressurized and oil is output. When the oil chamber expands, the air chamber of the adjusting block can be compressed and adjusted by adjusting the piston 1037. This structure realizes a variety of different functions.
[0049] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.
Claims
1. A high-efficiency switchable asymmetric cold rolling mill, characterized in that, The main body base (2) has two symmetrically distributed roller seat windows (201) inside. Inside the roller seat windows (201), the upper bearing roller (6), upper intermediate roller (7), upper working roller (8), lower working roller (9), lower intermediate roller (10) and lower bearing roller (11) are arranged vertically and on the same plane from top to bottom. The roller mounting seats that are rotatably connected at both ends of the upper bearing roller (6), upper intermediate roller (7), lower intermediate roller (10) and lower bearing roller (11) are all vertically slidably connected in the roller seat windows (201). The inner walls of the two roller seat windows (201) are symmetrically constructed with extended grooves (202). The gas-liquid auxiliary mechanism (1) includes an oil-bearing unit (102), a pneumatic support unit (101), an oil-gas control unit (103) for regulating the oil-gas pressure and flow direction of the oil-bearing unit (102) and the pneumatic support unit (101), and an external oil-gas supply unit for providing oil-gas transportation and replenishment to the oil-gas control unit (103). The oil-bearing unit (102) is rotatably disposed at both ends of the upper working roller (8) and the lower working roller (9), respectively, and is used to provide installation bearing, oil cooling and lubrication and auxiliary distance measurement functions for the working roller. The pneumatic support unit (101) is disposed at both ends of the oil-bearing unit (102) and the upper intermediate roller (7) and the lower intermediate roller (10). Between the roll mounting seats of the section, flexible support and locking positioning of the upper intermediate roll (7) and upper bearing roll (6) are realized, as well as axial positioning of the work roll. The oil bearing units (102) are connected in series through pipelines, and the oil and gas control unit (103) is connected to the first oil bearing unit (102) and the last oil bearing unit (102) through pipelines respectively. The pneumatic support units (101) are connected in series through pipelines, and the oil and gas control unit (103) is connected to the first pneumatic support unit (101) and the last pneumatic support unit (101) through pipelines respectively. The oil and gas supply unit is connected to the oil and gas control unit (103) through pipelines. Locking guide mechanism (5) is provided in total, with two as a group. Each group of locking guide mechanisms (5) is symmetrically arranged on the main body base (2) for positioning and holding the oil bearing unit (102) during the rolling process, assisting in disassembly during the roll changing process, assisting in positioning and locking the pneumatic support unit (101), and adjusting the distance between the upper working roll (8) and the lower working roll (9). The main base (2) is also equipped with a lifting mechanism (4) for driving the locking guide mechanism (5) to perform vertical lifting and lowering movements, and a pressing mechanism (3) for applying downward rolling pressure to the upper bearing roller (6).
2. The high-efficiency switchable asymmetric cold rolling mill as described in claim 1, characterized in that: The locking guide mechanism (5) includes a locking housing (506) that is slidably disposed on the main body base (2) in a vertical direction. A partition guide frame (504) is coaxially disposed on the inner wall of the locking housing (506). A main body slider (502) that can move like a piston is disposed inside the partition guide frame (504). The main body slider (502) extends through a preset hole on the locking housing (506) to the outside of the locking housing (506) and is connected to an isosceles trapezoidal column (501). A movable piston (503) is disposed radially on the main body slider (502). The movable piston (503) can move like a piston inside the locking housing (506). A distance measuring sensor (505) is axially disposed on the inner wall of the locking housing (506). An oil supply connection port (507) on the locking housing (506) is connected to an oil supply system through a pipeline.
3. The high-efficiency switchable asymmetric cold rolling mill as described in claim 1, characterized in that: The oil carrying unit (102) includes a rectangular base (1022), with guide slopes (1021) formed at the four corners of the base (1022). The base (1022) has a lubricating oil cavity (1026) for storing and circulating oil, and a fine hole (1024) communicating with the lubricating oil cavity (1026). The base (1022) has two oil seat connection ports (1023) communicating with the lubricating oil cavity (1026). The guide slopes (1021) are adapted to fit the slope of the isosceles trapezoidal column (501).
4. The high-efficiency switchable asymmetric cold rolling mill as described in claim 1, characterized in that: The oil and gas control unit (103) includes two identical and interconnected regulating blocks A (1031) and B (1032). Both regulating blocks A (1031) and B (1032) have a large-diameter cavity (1036) and small-diameter cavities (1038) located on both sides of the large-diameter cavity (1036) and connected to it. A regulating piston (1037) is installed within the large-diameter cavity (1036), and the regulating piston (1037) can only move within the range of the large-diameter cavity (1036). Both regulating blocks A (1031) and B (1032) are equipped with pressure sensors (1039) for... The air pressure value in one of the small-diameter cavities (1038) is detected. The regulating block A (1031) and regulating block B (1032) are also provided with one air pipe connection (10310) and two air pipe connection ports (10311) communicating with the small-diameter cavity (1038). The regulating block A (1031) and regulating block B (1032) are also equipped with oil pressure sensors (1035) to detect the oil pressure value in the other small-diameter cavity (1038). The regulating block A (1031) and regulating block B (1032) are also provided with one oil pipe connection (1033) and two oil pipe connection ports (1034) communicating with the small-diameter cavity (1038).
5. The high-efficiency switchable asymmetric cold rolling mill as described in claim 1, characterized in that: The pneumatic support unit (101) includes a support box (1011), which has an annular cavity (1015) and a central cavity (1019) located in the center of the annular cavity (1015). The central cavity (1019) has an open top and a closed bottom. An inner frame (1016) with a matching structure is inserted into the central cavity (1019). The inner frame (1016) has at least two guide protrusions (1018) on its outer periphery and a bearing plate (1012) at its upper end. The bearing plate (1012) is used to connect with the roll mounting seats at the ends of the upper intermediate roll (7) and the lower intermediate roll (10). The guide protrusions (1018) are also provided with a bearing plate (1012) at their upper end. 18) The support box (1011) is provided with two pneumatic connection ports (1013) connected to the annular cavity (1015) in the guide window between the central cavity (1019) and the annular cavity (1015). The outer circumferential surface of the support box (1011) is also provided with a preset window for the locking plate (1017) to extend radially. The locking plate (1017) is provided with a limiting plate (10110) at one end in the annular cavity (1015). The support box (1011) is provided with a positioning insert (1014) with a triangular cross-section at the bottom. The positioning insert (1014) can be embedded in the positioning groove (1025) opened on the oil carrying unit (102).