CN205816465U - Six-roller cold rolling leveling machine - Google Patents

Abstract

The utility model provides a six-roller cold-rolling tempering machine, which includes a frame, and an upper support roll, an upper intermediate roll, an upper working roll, a lower working roll, and a lower intermediate roll are sequentially arranged in the window of the frame from top to bottom. , the lower back-up roll and the hydraulic pressure upper cylinder, the hydraulic pressure upper cylinder can drive the upper work roll and the lower work roll for rolling; the six-roll cold rolling mill is at least provided with two sets of upper middle roll, upper work roll, The lower work roll and the lower intermediate roll are composed of a roll set, and in the vertical direction, the height difference between the two roll sets is less than or equal to 200mm, and the stroke of the hydraulic pressure upper cylinder is 150mm to 200mm. The utility model can solve the problem that the diameter change of the roll system is relatively large when the work rolls with large and small diameters are used, ensure that the stroke of the hydraulic pressure upper cylinder is short and the adjustment amount of the rolling line adjustment device is small, and can meet high-speed flattening and high-speed secondary cold rolling Require.

Description

Six-roll cold-rolled skin pass mill

technical field

The utility model relates to a cold-rolling mechanical equipment in the technical field of cold-rolling and tempering strip steel, in particular to a six-roller cold-rolling tempering machine.

Background technique

In the field of advanced cold-rolled steel strips, especially the production of tin-plated substrates, a six-roll skin pass unit is generally used to carry out tempering or secondary cold rolling of the annealed steel strips. In order to realize the function of secondary cold rolling with large reduction rate, two kinds of work rolls with different diameters are generally configured. Such cold tempering mills are already known. In order to ensure the two different functions of leveling effect and large reduction rate rolling, it is necessary to configure work rolls with a large diameter difference; among them, the large diameter work roll is used for leveling and small reduction rate rolling, and the small diameter work roll is used for large reduction Lower rate rolling. The problems with this model are:

1. Since the hydraulic pressure upper cylinder needs to compensate the change in the diameter of the roll system, the use of large and small diameter work rolls results in a large change in the diameter of the roll system that needs to be compensated, so a large-stroke hydraulic cylinder is required to provide rolling force; As an example, the hydraulic pressure upper cylinder has a bore diameter of φ600mm and a stroke of about 340mm; while a large-stroke hydraulic cylinder not only has high manufacturing costs, but also reduces frequency response and stiffness performance (natural frequency is less than 20Hz), which will reduce the hydraulic pressure upper system. The dynamic characteristics are not conducive to the shape control of high-speed rolling high-precision strip products (generally the rolling speed is less than 1200m/min), which affects the stability of the unit; in severe cases, the function of secondary cold rolling with a large reduction rate cannot be realized.

2. After using large and small diameter work rolls, the diameter of the roll system that needs to be compensated changes greatly, so a larger rolling line adjustment device needs to be used. Still taking the above-mentioned 1200mm cold rolling pass mill as an example, its rolling line adjustment device needs a total adjustment amount of 280mm. This not only leads to a larger structure of the device, increases the manufacturing cost, but also reduces the stability of the rolling line adjustment device.

Utility model content

Aiming at the problem that the diameter change of the supplementary roll system required by the large and small diameter work rolls in the prior art is relatively large, the utility model proposes a six-roll cold rolling skin pass mill, which can solve the problem of the diameter of the roll system caused by the use of large and small diameter work rolls. For the problem of relatively large change, ensure that the stroke of the hydraulic pressure upper cylinder is short and the adjustment amount of the rolling line adjustment device is small, and it can meet the requirements of high-speed smoothing and high-speed secondary cold rolling.

The technical scheme adopted by the utility model to solve the technical problem is: a six-roller cold rolling pass mill, including a frame, and the window of the frame is sequentially arranged with an upper support roll, an upper intermediate roll, and an upper working roller. roll, lower work roll, lower intermediate roll, lower back-up roll and hydraulic pressure upper cylinder, the hydraulic pressure upper cylinder can drive the upper work roll and the lower work roll for rolling; the six-roll cold rolling pass mill is provided with at least two groups A roll set consisting of an upper middle roll, an upper work roll, a lower work roll and a lower middle roll, and in the vertical direction, the height difference between the two roll sets is less than or equal to 200mm, and the stroke of the hydraulic pressure upper cylinder 150mm to 200mm.

When the roll body width of the upper work roll (51) and the roll body width of the lower work roll (52) are 1000mm to 1500mm, the height of the roll group is 1700mm to 1900mm, and the stroke of the hydraulic cylinder is 150mm to 200mm.

When the outer diameter of the upper work roll and the outer diameter of the lower work roll are 410 mm to 460 mm, the outer diameter of the upper intermediate roll and the outer diameter of the lower intermediate roll are 440 mm to 490 mm;

When the outer diameters of the upper work roll and the lower work roll are 300 mm to 340 mm, the outer diameters of the upper intermediate roll and the lower intermediate roll are 600 mm to 550 mm.

The cylinder diameter of the hydraulic pressure upper cylinder is 600mm, and the stroke of the hydraulic pressure upper cylinder is 200mm.

The height of the window of the frame in the vertical direction is greater than 5500mm, and the diameters of the upper support roller and the lower support roller are both 1050mm to 1150mm.

The window of the rack is also provided with a rolling line adjustment device, which is located between the upper surface of the window and the upper support roller, and the adjustment amount of the rolling line adjustment device is 100mm to 200mm.

The middle part of the frame is provided with a work roll bending device capable of bending the upper work roll and the lower work roll, and the work roll bender is connected with the upper work roll and the lower work roll.

The upper part of the frame corresponds to the position of the upper intermediate roll. There is an upper intermediate roll bending device capable of bending the upper intermediate roll. The upper intermediate roll bending device is connected with the upper intermediate roll. The lower part of the frame corresponds to the position of the lower intermediate roll. A lower intermediate roll bending device capable of bending the lower intermediate roll is provided, the lower intermediate roll bending device is connected with the lower intermediate roll, and the lower part of the lower intermediate roll bending device is provided with a lower intermediate roll track block;

The drive side of the frame is provided with an intermediate roll shifting device that can drive the upper intermediate roll and the lower intermediate roll to move axially, and the intermediate roll shifting device is connected with the upper intermediate roll through the upper intermediate roll bending device, and the intermediate roll shifts The roller device is connected with the lower middle roller through the lower middle roller bending device.

The upper part of the frame corresponding to the position of the upper backup roll is provided with an upper roll axial locking device capable of axially locking the upper backup roll and the upper work roll, and the lower part of the frame is provided with a position corresponding to the lower backup roll for axial locking. Axial locking device for the lower roll that locks the lower work roll and the lower back-up roll.

When the roll barrel width of the upper working roll and the roll barrel width of the lower working roll are less than 1000mm, the height of the roll set is 1500mm to 1700mm.

The beneficial effect of the utility model is that by limiting the height difference of at least two groups of roll groups composed of upper intermediate rolls, upper working rolls, lower working rolls and lower intermediate rolls within 200 mm, the resulting The change in diameter of the roll system ensures that the stroke of the hydraulic upper cylinder is short and the adjustment of the rolling line adjustment device is small, and it can meet the requirements of high-speed smoothing and high-speed secondary cold rolling.

Description of drawings

Fig. 1 is the structural representation of the six-roller cold rolling skin pass mill of the present utility model;

Fig. 2 is a schematic sectional view of line A-A in Fig. 1;

Fig. 3 is the structural schematic view of the first upper intermediate roll, upper work roll, lower work roll and lower intermediate roll;

Fig. 4 is a structural schematic view of the second type of upper middle roll, upper work roll, lower work roll and lower middle roll.

Explanation of reference signs:

1. Stand, 2. Rolling line adjustment device, 3. Upper back-up roll, 4. Upper middle roll, 51. Upper work roll, 52. Lower work roll, 6. Lower middle roll, 7. Lower back-up roll, 81, Upper roll axial locking device, 82. Lower roll axial locking device, 9. Hydraulic upper cylinder, 10. Intermediate roll shifting device, 11. Work roll bending device, 12. Upper intermediate roll bending device, 13. Lower middle roller bending device, 14. Lower middle roller track block, 15. Upper backup roller balance device.

detailed description

In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation of the utility model is now described with reference to the accompanying drawings.

As shown in Figure 1, the utility model proposes a six-roller cold-rolled tempering machine, including a frame 1, and the window of the frame 1 is sequentially provided with an upper back-up roll 3, an upper intermediate roll 4, an upper Work roll 51, lower work roll 52, lower intermediate roll 6, lower back-up roll 7 and hydraulic pressure upper cylinder 9, hydraulic pressure upper cylinder 9 can drive upper work roll 51 and lower work roll 52 to carry out rolling; Roll leveling machine is provided with at least two groups of roll groups made up of upper middle roll 4, upper work roll 51, lower work roll 52 and lower middle roll 6, and in the vertical direction, between two described roll groups The height difference is less than or equal to 200mm, and the stroke of the hydraulic pressure upper cylinder 9 is 150mm to 200mm.

The height of the roller set refers to the distance between the horizontal plane where the top of the upper intermediate roller 4 is located and the horizontal plane where the bottom of the lower intermediate roller 6 is located. In the six-roller cold-rolling tempering mill of the present utility model, there are at least two sets of rolls, and the height difference between the two sets of rolls is limited within 200mm, that is to say, when using large and small diameters to work When rolling, the amount of change in the diameter of the roll system is much smaller than that of the prior art. Therefore, the six-roll cold rolling mill can adopt both the upper work roll 51 and the lower work roll 52 with a larger diameter, and the lower work roll with a smaller diameter. The upper intermediate roll 4 and the lower intermediate roll 6 are used to achieve leveling and small reduction rolling, and the upper intermediate roll 51 and the lower working roll 52 with a smaller diameter, and the upper intermediate roll 4 and the lower intermediate roll 6 with a larger diameter can also be used To satisfy rolling with large reduction rate, when working rolls with different diameters are used, the height difference of the roll group is small, which also reduces the amount of change in the diameter of the roll set that the hydraulic pressure upper cylinder 9 needs to compensate. Therefore, the six The roll cold rolling tempering machine does not need to use a large-stroke hydraulic cylinder to provide rolling force, but a hydraulic pressure upper cylinder 9 with a stroke of 150mm to 200mm. In view of the fact that the natural frequency of the hydraulic pressure upper cylinder 9 is inversely proportional to its stroke, the hydraulic pressure upper cylinder 9 with a small stroke can increase the natural frequency of the hydraulic pressure upper cylinder 9, for example greater than 20 Hz, thereby facilitating the control of the hydraulic pressure upper cylinder 9 , so that the performance of the hydraulic pressure upper cylinder 9 is advanced and reliable, and meets the requirements of high-speed smoothing and high-speed secondary cold rolling; especially when the speed is greater than 1800m/min, if the natural frequency of the hydraulic pressure upper cylinder 9 is above 20Hz, it will Improving the dynamic characteristics of the hydraulic pressing system not only facilitates the precise control of the shape and thickness of the plate, but also improves the operating rate of the unit, and can also avoid the serious consequences of unsmooth rolling due to low natural frequency, such as lower than 15Hz. . The hydraulic pressure upper cylinder 9 drives the upper work roll 51 and the lower work roll 52 to perform rolling, which is part of the prior art and will not be repeated here.

In a specific embodiment, when the body width of the upper work roll 51 and the body width of the lower work roll 52 is 1000 mm to 1500 mm, the height of the roll set is 1700 mm to 1900 mm. That is to say, when rolling with work rolls of different diameters, the sum of the diameters of the upper intermediate roll 4, the upper work roll 51, the lower work roll 52, and the lower intermediate roll 6 has a small variation, thereby reducing the hydraulic pressure of the upper cylinder. 9. The diameter variation of the roll system needs to be compensated. Therefore, the six-high cold rolling tempering machine can meet the requirements of high-speed tempering and high-speed secondary cold rolling without using a large-stroke hydraulic cylinder to provide rolling force.

In a feasible embodiment, when the outer diameter of the upper work roll 51 and the outer diameter of the lower work roll 52 are 410 mm to 460 mm, the outer diameter of the upper intermediate roll 4 and the outer diameter of the lower intermediate roll 6 are 440 mm to 490 mm; When the outer diameters of the upper work roll 51 and the lower work roll 52 are 300 mm to 340 mm, the outer diameters of the upper intermediate roll 4 and the lower intermediate roll 6 are 600 mm to 550 mm. Equipped with upper work roll 51 and lower work roll 52 with large and small outer diameter specifications, as well as upper intermediate roll 4 and lower intermediate roll 6 with large and small outer diameter specifications, for smooth or small reduction rate rolling When using the upper work roll 51 and the lower work roll 52 with an outer diameter of 410mm to 460mm, the upper intermediate roll 4 and the lower intermediate roll 6 with an outer diameter of 440mm to 490mm can ensure good smoothing or rolling effect. When rolling with a large reduction rate, the upper work roll 51 and the lower work roll 52 with an outer diameter of 300mm to 340mm are used together with the upper middle roll 4 and the lower middle roll 6 with an outer diameter of 600mm to 550mm, which can ensure that Extremely high reduction rate, producing extremely thin strip steel. Since the upper work roll 51 and the lower work roll 52 with a larger outer diameter are used in conjunction with the upper intermediate roll 4 and the lower intermediate roll 6 with a smaller outer diameter, or the upper work roll 51 and the lower work roll 52 with a smaller outer diameter are used in conjunction with the outer The upper intermediate roll 4 and the lower intermediate roll 6 with a larger diameter are used together, so the change in roll diameter that needs to be compensated is reduced, which can not only achieve the secondary cold rolling function of leveling and large reduction rate, but also use small-stroke hydraulic pressing. Cylinder 9 has high natural frequency, advanced and reliable performance, and can meet the control accuracy requirements of high-precision plate shape and plate thickness.

In the preferred embodiment shown in Figure 3, the outer diameters of the upper work roll 51 and the lower work roll 52 are both 460 mm to 410 mm, and the outer diameters of the upper intermediate roll 4 and the lower intermediate roll 6 are both 490mm to 440mm to ensure a good leveling or rolling effect. In the preferred embodiment shown in Figure 4, the outer diameters of the upper work roll 51 and the lower work roll 52 are both 340 mm to 300 mm, and the outer diameters of the upper intermediate roll 4 and the lower intermediate roll 6 are both 600mm to 550mm to ensure maximum reduction rate and produce extremely thin strip steel. Among them, the hydraulic pressure upper cylinder 9 can adopt a hydraulic cylinder with a cylinder diameter of 600 mm and a stroke of 200 mm, and its natural frequency reaches 21 Hz, thereby meeting the requirements of the dynamic characteristics of the hydraulic pressure upper system for high-speed rolling above 1800 m/min.

In addition, a rolling line adjustment device 2 is also provided in the window of the frame 1, and the rolling line adjustment device 2 is located between the upper surface of the window and the upper support roller 3, and the adjustment amount of the rolling line adjustment device 2 is 100mm to 200mm. In the six-high cold rolling skin pass mill of the present utility model, the sum of the diameters of the upper middle roll 4, the upper work roll 51, the lower work roll 52 and the lower middle roll 6 is kept within the range of 1700mm to 1900mm, therefore, the The six-high cold rolling pass mill can not only use the upper work roll 51 and the lower work roll 52 with a larger diameter, the upper middle roll 4 and the lower middle roll 6 with a smaller diameter to achieve leveling and small reduction rate rolling, but also can Use upper work roll 51 and lower work roll 52 with smaller diameter, and upper middle roll 4 and lower middle roll 6 with larger diameter to meet high reduction ratio rolling. When working rolls with different diameters are used, the upper middle roll 4 , the sum of the diameters of the upper work roll 51, the lower work roll 52, and the lower intermediate roll 6 has a relatively small change, which also reduces the change in the diameter of the roll system that the rolling line adjustment device 2 needs to compensate. Therefore, the six-roll cold-rolled flat The whole machine does not need to use a rolling line adjustment device 2 with a large adjustment amount, but a rolling line adjustment device 2 with an adjustment amount of 100mm to 200mm, because the rolling line adjustment device with a large adjustment amount has a large structure, high cost and low stability , the rolling line adjustment device 2 with a small adjustment amount is simple in structure, low in cost and high in stability, so that the structure of the utility model is simpler and the weight is lighter. In a preferred embodiment, the adjustment amount of the rolling line adjustment device 2 can be 200mm.

In the embodiment shown in Fig. 1 to Fig. 4, the height of the window of the frame 1 of the six-roll cold rolling skin pass mill in the vertical direction is greater than 5500mm, and the roll body width of the upper work roll 51 and the lower work roll 52 The width of the roller body is 1000mm to 1500mm, and the diameters of the upper backup roller 3 and the lower backup roller 7 are 1050mm to 1150mm. The frame 1 is a closed frame structure, wherein the axis of the upper back-up roll 3, the axis of the upper intermediate roll 4, the axis of the upper work roll 51, the axis of the lower work roll 52, the axis of the lower intermediate roll 6 and the lower support roll 7 The axis lines are all parallel to the horizontal plane, and the upper back-up roll 3, upper middle roll 4, upper work roll 51, lower work roll 52, lower middle roll 6 and lower back-up roll 7 are all supported on their respective bearing housings by rotating bearings; The work roll 51 and the lower work roll 52 are arranged symmetrically with respect to the rolling line of the six-roll cold rolling skin pass mill, and the upper middle roll 4 and the lower middle roll 6 are arranged relative to the rolling line of the described six-roll cold rolling skin pass mill. Symmetrically arranged, the upper back-up roll 3 and the lower back-up roll 7 are arranged symmetrically with respect to the rolling line of the six-roll cold rolling tempering mill.

The upper part of the frame 1 corresponds to the position of the upper back-up roll 3 is provided with an upper roll axial locking device 81 capable of axially locking the upper back-up roll 3 and the upper work roll 51, and the lower part of the frame 1 corresponds to the lower back-up roll 7 A lower roll axial locking device 82 for axially locking the lower work roll 52 and the lower back-up roll 7 is provided at the position. Between the upper supporting roller 3 and the upper intermediate roller 4 , the frame 1 is also provided with an upper supporting roller balancing device 15 capable of balancing the upper supporting roller 3 .

The position corresponding to the upper intermediate roll 4 on the top of the frame 1 is provided with an upper intermediate roll bending device 12 capable of bending the upper intermediate roll 4, and the upper intermediate roll bending device 12 is connected with the upper intermediate roll 4; The position corresponding to the lower intermediate roll 6 at the bottom is provided with a lower intermediate roll bending device 13 capable of bending the lower intermediate roll 6, the lower intermediate roll bending device 13 is connected with the lower intermediate roll 6, and the lower intermediate roll bending device 13 The lower part is provided with a lower intermediate roller track block 14 .

As shown in Figure 2, the drive side of the frame 1 is provided with an intermediate roll shifting device 10 that can drive the upper intermediate roll 4 and the lower intermediate roll 6 to move axially, and the intermediate roll shifting device 10 passes through the upper intermediate roll bending roll The device 12 is connected with the upper intermediate roll 4 , and the intermediate roll shifting device 10 is connected with the lower intermediate roll 6 through the lower intermediate roll bending device 13 .

A work roll bending device 11 capable of bending the upper work roll 51 and the lower work roll 52 is arranged in the middle of the frame 1 , and the work roll bender 11 is connected with the upper work roll 51 and the lower work roll 52 .

For other specifications of the six-high cold rolling skin pass mill, for example, when the roll body width of the upper work roll 51 and the roll body width of the lower work roll 52 is less than 1000 mm, the height of the roll set is 1500 mm to 1700 mm.

From the above, it can be known that the six-roll cold-rolled skin pass mill of the present invention also has the following advantages under the condition that various performance parameters are not reduced:

1. The upper and lower work rolls with large and small outer diameters can be used, and the upper and lower work rolls with large outer diameters can be used to meet the rolling and smoothing needs of small reduction rate, and the upper work rolls with small outer diameters can also be used rolls and lower work rolls to meet the needs of large reduction rate rolling;

2. After the upper and lower work rolls with large and small outer diameters are used to cooperate with the upper and lower intermediate rolls with large and small outer diameters, hydraulic pressure upper cylinders with smaller cylinder diameters and short strokes can be used to improve the hydraulic pressure of the upper cylinder. The frequency response and stiffness can reach a natural frequency above 20Hz, which ensures the dynamic characteristics of the hydraulic pressing system, which is beneficial to the dimensional accuracy control of cold-rolled strip products, especially the dimensional accuracy control of high-speed strip rolling. The maximum speed of the unit can reach more than 1800m/min;

3. After the working rolls and intermediate rolls with different sizes and outer diameters are used together, the roll diameter change that the rolling line adjustment device needs to compensate is greatly reduced, so that a mechanism with a simpler structure and lighter weight can be designed to meet the rolling line adjustment requirements , which is conducive to the stability of the rolling line adjustment mechanism, thereby facilitating the precision control of the rolling process;

The utility model has a simple and practical structure, simplifies the design of the rolling line adjustment device, improves the frequency response and stiffness performance of the hydraulic pressure upper cylinder of the rolling mill, ensures the dynamic characteristics of the hydraulic pressure upper system, improves the rolling speed of the unit, and can Reaching above 1800m/min; improving the dimensional accuracy of the strip product and the operating efficiency of the unit, it is suitable for rolling and smoothing strip products such as rolled plain carbon steel, high-quality carbon steel, and low-alloy steel.

The above descriptions are only illustrative specific implementations of the present utility model, and are not intended to limit the scope of the present utility model. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principle of the present utility model shall fall within the protection scope of the present utility model. And it should be noted that each component of the utility model is not limited to the above-mentioned overall application, and each technical feature described in the specification of the utility model can be selected to be used alone or in combination according to actual needs. Therefore, The utility model naturally covers other combinations and specific applications related to the innovation of this case.

Claims (10)

1. a six-roller cold-rolled tempering machine, it is characterized in that, said six-roller cold-rolled tempering machine comprises frame (1), and in the window of frame (1) is provided with upper support roll successively from top to bottom (3), upper intermediate roll (4), upper work roll (51), lower work roll (52), lower intermediate roll (6), lower back-up roll (7) and hydraulic pressure upper cylinder (9), hydraulic pressure upper Cylinder (9) can drive upper work roll (51) and lower work roll (52) to carry out rolling; Described six-roll cold-rolling pass mill is provided with two groups at least by upper intermediate roll (4), upper work roll (51) ), the lower work roll (52) and the lower intermediate roll (6), and in the vertical direction, the height difference between the two roll groups is less than or equal to 200mm, and the hydraulic pressure upper cylinder (9) The stroke is 120mm to 200mm. 2. The six-high cold-rolled temper mill according to claim 1, characterized in that, when the roll body width of the upper work roll (51) and the roll body width of the lower work roll (52) are 1000mm to 1500mm, the The height of the roller set is 1700mm to 1900mm. 3. The six-high cold-rolling temper mill according to claim 2, characterized in that, when the outer diameter of the upper work roll (51) and the outer diameter of the lower work roll (52) are 410mm to 490mm, the upper intermediate roll The outer diameter of (4) and the outer diameter of the lower intermediate roll (6) are 440mm to 490mm; When the outer diameter of the upper work roll (51) and the outer diameter of the lower work roll (52) were 300mm to 340mm, the outer diameter of the upper intermediate roll (4) and the outer diameter of the lower intermediate roll (6) were 550mm to 600mm. 4. The six-roll cold-rolled skin pass mill according to any one of claims 1 to 3, characterized in that, the cylinder diameter of the hydraulic pressure upper cylinder (9) is 600mm, and the stroke of the hydraulic pressure upper cylinder (9) is 200mm. 5. according to claim 2 or 3 described six-roller cold-rolled tempering mills, it is characterized in that, the height of the window of frame (1) is greater than 5500mm in vertical direction, the diameter of upper support roll (3) and the lower support The diameters of the rollers (7) are all 1050mm to 1150mm. 6. The six-roll cold-rolling tempering mill according to any one of claims 1 to 3, characterized in that, the window of the frame (1) is also provided with a rolling line adjustment device (2), and the rolling line The adjustment device (2) is located between the upper surface of the window and the upper backup roll (3), and the adjustment amount of the rolling line adjustment device (2) is 100mm to 200mm. 7. The six-roll cold rolling skin pass mill according to any one of claims 1 to 3, characterized in that, the middle part of the frame (1) is provided with a device capable of making the upper work roll (51) and the lower work roll (52) the work roll bending device (11) of bending roll, the work roll bending device (11) is connected with upper work roll (51) and lower work roll (52). 8. The six-roll cold-rolling tempering mill according to any one of claims 1 to 3, characterized in that, the position corresponding to the upper intermediate roll (4) on the top of the frame (1) is provided with a The upper intermediate roll bending device (12) of the intermediate roll (4) bending roll, the upper intermediate roll bending device (12) is connected with the upper intermediate roll (4); the bottom of the frame (1) corresponds to the lower intermediate roll (6 ) is provided with a lower intermediate roll bending device (13) capable of bending the lower intermediate roll (6), the lower intermediate roll bending device (13) is connected with the lower intermediate roll (6), and the lower intermediate roll bending The lower part of the device (13) is provided with a lower intermediate roller track block (14); The drive side of the frame (1) is provided with an intermediate roll shifting device (10) capable of driving the upper intermediate roll (4) and the lower intermediate roll (6) to move axially, and the intermediate roll shifting device (10) passes through the upper The intermediate roll bending device (12) is connected with the upper intermediate roll (4), and the intermediate roll shifting device (10) is connected with the lower intermediate roll (6) through the lower intermediate roll bending device (13). 9. The six-roll cold-rolling tempering mill according to any one of claims 1 to 3, characterized in that, the upper part of the frame (1) is provided with a shaft that can correspond to the position of the upper backup roll (3). To lock the upper roll axial locking device (81) of the upper back-up roll (3) and the upper work roll (51), the position corresponding to the lower back-up roll (7) of the frame (1) is provided with an axial Lock the lower roll axial locking device (82) of the lower work roll (52) and the lower back-up roll (7). 10. The six-high cold-rolled skin pass mill according to claim 1, characterized in that, when the roll body width of the upper work roll (51) and the roll body width of the lower work roll (52) are less than 1000mm, the roll The height of the group is 1500mm to 1700mm.