CN-122007165-A - High-efficiency switchable asymmetric cold rolling mill

Abstract

The invention relates to the technical field of cold rolling mills, in particular to a high-efficiency switchable asymmetric cold rolling mill which comprises two roll seat windows symmetrically arranged in a main body base, wherein expansion grooves are formed in the inner walls of the two roll seat windows, each gas-liquid auxiliary mechanism comprises an oil bearing unit, a pneumatic supporting unit, an oil gas regulating unit and an oil gas supply unit, four locking guide mechanisms are arranged in a group, each group of locking guide mechanisms are symmetrically arranged on the main body base, and each locking guide mechanism is used for realizing positioning and retaining of the oil bearing unit in the rolling process, auxiliary disassembly in the roll changing process and auxiliary locking of the pneumatic supporting unit. The expansion window adopted in the invention can compensate the thermal expansion displacement of the component, avoid the problems of component blockage and blockage during rolling, realize the cooling and lubrication of the oil bearing unit by the closed-loop circulation of the oil liquid, and realize the flexible support of the roller system, the locking positioning of the roller changing and the axial positioning of the working roller by the pneumatic support unit, and buffer the impact of rolling pressure.

Inventors

• WENG ZHIJIANG
• TANG WEIYU
• ZHANG WENJIA
• ZHU ZHONGHUA

Assignees

• 江苏江南精密金属材料有限公司

Dates

Publication Date

20260512

Application Date

20260413

Claims (5)

1. 1. The high-efficiency switchable asymmetric cold rolling mill is characterized by comprising a main body base (2), wherein two oppositely distributed roller seat windows (201) are symmetrically arranged in the main body base, an upper bearing roller (6), an upper middle roller (7), an upper working roller (8), a lower working roller (9), a lower middle roller (10) and a lower bearing roller (11) are sequentially arranged in the main body base from top to bottom along the vertical direction on the same plane, roller mounting seats which are rotationally connected with two ends of the upper bearing roller (6), the upper middle roller (7), the lower middle roller (10) and the lower bearing roller (11) are vertically and slidingly connected in the roller seat windows (201), and extension grooves (202) are symmetrically formed on the inner walls of the two roller seat windows (201); The gas-liquid auxiliary mechanism (1) comprises an oil bearing unit (102), a pneumatic supporting unit (101), an oil gas pressure regulating unit (103) for regulating and controlling the oil gas pressure and the flow direction of the oil bearing unit (102) and the pneumatic supporting unit (101) and an external oil gas supply unit for supplying oil gas to the oil gas regulating unit (103), wherein the oil bearing unit (102) is respectively rotatably arranged at two ends of an upper working roller (8) and a lower working roller (9) and is used for providing functions of bearing installation, oil cooling and lubrication and auxiliary ranging for the working rollers, the pneumatic supporting unit (101) is respectively arranged between the oil bearing unit (102) and roller mounting seats at the end parts of the upper middle roller (7) and the lower middle roller (10), the flexible support of the upper middle roller (7), the upper bearing roller (6) and the locking positioning of the working roller and the axial positioning of the working rollers are realized, the oil bearing unit (102) are connected in series through pipelines, the oil gas regulating and controlling unit (103) is respectively connected with the oil bearing unit (102) at the front end through pipelines, the pneumatic supporting unit (102) is connected with the bearing unit (102) at the tail end through the pneumatic supporting unit (101) through the pipelines, the oil gas supply unit is connected with the oil gas regulating unit (103) through a pipeline; The four locking guide mechanisms (5) are arranged in a group, and each group of the locking guide mechanisms (5) is symmetrically arranged on the main body base (2) and is used for realizing positioning and holding of the oil bearing unit (102) in the rolling process, auxiliary disassembly in the roll changing process, auxiliary positioning and locking of the pneumatic supporting unit (101) and interval adjustment between the upper working roll (8) and the lower working roll (9); The main body base (2) is also provided with a lifting mechanism (4) for driving the locking guide mechanism (5) to vertically lift and fall and a pressing mechanism (3) for applying downward rolling pressure to the upper bearing roller (6).
2. 2. The efficient switchable asymmetric cold rolling mill of claim 1, wherein the locking guide mechanism (5) comprises a locking box body (506) which is arranged on the main body base (2) in a sliding manner along a vertical direction, a separation guide frame (504) is coaxially arranged on the inner wall of the locking box body (506), a main body sliding block (502) capable of moving a piston is arranged in the separation guide frame (504), the main body sliding block (502) penetrates through a preset hole in the locking box body (506) to extend to the outside of the locking box body (506) to be connected with an isosceles trapezoid column (501), a movable piston (503) is arranged on the main body sliding block (502) in a radial direction, the movable piston (503) can move in the locking box body (506), a distance measuring sensor (505) is axially arranged on the inner wall of the locking box body (506), and an oil supply connecting port (507) on the locking box body (506) is connected with an oil supply system through a pipeline.
3. 3. The efficient switchable asymmetric cold rolling mill of claim 1, wherein the oil bearing unit (102) comprises a rectangular base (1022), guide inclined planes (1021) are formed at four corners of the base (1022), an oil cavity (1026) for storing and flowing oil and a fine hole (1024) communicated with the oil cavity (1026) are formed in the base (1022), two oil base connecting ports (1023) communicated with the oil cavity (1026) are formed in the base (1022), and the guide inclined planes (1021) are fit with the inclined planes of the isosceles trapezoid columns (501).
4. 4. The efficient switchable asymmetric cold rolling mill of claim 1, wherein the oil gas regulating unit (103) comprises two regulating blocks A (1031) and B (1032) which are identical in structure and are connected with each other, a large-diameter cavity (1036) and small-diameter cavities (1038) which are positioned at two sides of the large-diameter cavity (1036) and are communicated with the large-diameter cavity are formed in each of the regulating blocks A (1031) and B (1032), regulating pistons (1037) are arranged in the large-diameter cavity (1036), the regulating pistons (1037) can only move in the range of the large-diameter cavity (1036), air pressure sensors (1039) are arranged on each of the regulating blocks A (1031) and B (1032) and are used for detecting air pressure values in one of the small-diameter cavities (1038), air pipe connecting ports (10310) which are communicated with the small-diameter cavity (1038) are further arranged on each of the regulating blocks A (1031) and B (1032) and two air pipe connecting ports (10311) are connected with air pipes, and the other air pressure sensors (1035) are arranged on each regulating block A (1031) and B (1032) and are used for detecting air pressure values in the other small-diameter cavity (1035), and the regulating block A (1031) and the regulating block B (1032) are also provided with a first oil pipe connection port (1033) and a second oil pipe connection port (1034) which are communicated with the small-diameter cavity (1038).
5. 5. The efficient switchable asymmetric cold rolling mill of claim 1, wherein the pneumatic supporting unit (101) comprises a supporting box body (1011), an annular cavity (1015) with an annular structure and a central cavity (1019) positioned in the center of the annular cavity (1015) are formed in the supporting box body (1011), the central cavity (1019) is of a structure with an open top and a closed bottom, an inner frame body (1016) with a matched structure is inserted in the central cavity (1019), at least two guide protrusions (1018) are arranged on the periphery of the inner frame body (1016), a bearing plate (1012) is arranged at the upper end of the bearing plate (1012), the bearing plate (1012) is used for being connected with a roller mounting seat at the end of an upper middle roller (7) and a lower middle roller (10), the guide protrusions (1018) are embedded into a guide window formed between the central cavity (1019) and the annular cavity (1015), two connecting ports (1013) for being communicated with the annular cavity (1015) are formed in the supporting box body (1011), the periphery of the supporting box body (1019) is provided with a locking block (10110) which is arranged at one end of the supporting plate (10111) which is arranged along the radial direction, the cross section of the supporting box body (1017) is also provided with a locking plate (10), the positioning insert (1014) can be embedded into a positioning insert groove (1025) formed on the oil bearing unit (102).

Description

High-efficiency switchable asymmetric cold rolling mill Technical Field The invention relates to the technical field of cold rolling mills, in particular to a high-efficiency switchable asymmetric cold rolling mill. Background With the technical advantages of high rigidity and strong plate shape control capability of a roller system, the six-roller cold rolling mill becomes core equipment in high-precision thin strip rolling production, is generally provided with a three-layer six-roller structure of a bearing roller, a middle roller and a working roller, realizes the installation and lifting adjustment of each roller by depending on a roller seat structure on a base, and simultaneously applies rolling pressure by matching with a pressing mechanism so as to meet the rolling process requirement of a thin strip. However, in practical production application, the existing six-roller cold rolling mill still has a plurality of technical defects, and is difficult to adapt to the rolling production requirements of high precision and high efficiency: firstly, the traditional roll changing requires that the middle roll is firstly pulled out and then the working roll is pulled out, so that the steps are complicated and the time consumption is long; secondly, when a new working roll is pushed into a mill housing window, due to long-term abrasion or thermal expansion between a working roll bearing seat and a housing lining plate, clearance fit is difficult to control, and the pushing power is insufficient and even the working roll is blocked when the clearance is too small; Third, the traditional thickness control relies on the feedback adjustment of a hydraulic pressing system, and the feedforward compensation of the actual axial levelness and radial runout after the working roll is pushed in is lacked, so that the head-tail thickness is seriously out of tolerance, and the impact on the roll body exists when the pressing mechanism is initially started to press down. Disclosure of Invention The invention aims to solve the defects and provides an efficient switchable asymmetric cold rolling mill. In order to overcome the defects in the background technology, the technical scheme adopted by the invention for solving the technical problems is that the high-efficiency switchable asymmetric cold rolling mill comprises a main body base, wherein two relatively distributed roller seat windows are symmetrically arranged in the main body base, an upper bearing roller, an upper middle roller, an upper working roller, a lower middle roller and a lower bearing roller are sequentially arranged in the main body base from top to bottom along the vertical direction and on the same plane, roller mounting seats which are rotationally connected with two ends of the upper bearing roller, the upper middle roller, the lower middle roller and the lower bearing roller are vertically and slidingly connected in the roller seat windows, and expansion grooves are symmetrically formed on the inner walls of the two roller seat windows; The pneumatic supporting units are respectively arranged between the oil bearing units and roller mounting seats at the ends of the upper middle roller and the lower middle roller, so that flexible support and locking positioning during roller replacement of the upper middle roller and the upper bearing roller and axial positioning of the working roller are realized, the oil bearing units are connected in series through pipelines, the oil bearing units are respectively connected with the oil bearing units at the head end and the oil bearing units at the tail end through pipelines, the pneumatic supporting units are respectively connected with the pneumatic supporting units at the head end and the pneumatic supporting units at the tail end through pipelines, and the oil bearing units are connected with the oil bearing units through pipelines; The four locking guide mechanisms are arranged in a group, and each group of locking guide mechanisms is symmetrically arranged on the main body base and is used for realizing positioning and holding of the oil bearing unit in the rolling process, auxiliary disassembly in the roll changing process, auxiliary positioning and locking of the pneumatic supporting unit and interval adjustment between the upper working roll and the lower working roll; The main body base is also provided with a lifting mechanism for driving the locking guide mechanism to vertically lift and fall and a pressing mechanism for applying downward rolling pressure to the upper bearing roller. Further improvement, locking guiding mechanism includes the locking box that sets up on the main part base along the vertical direction slip, be equipped with on the locking box inner wall and separate the guide frame coaxially, be equipped with the main part slider that can make the piston motion in separating the guide frame, just main part slider passes the default hole on the locking box and extends to locking box outs