Roller balancing device of strip steel four-high mill
By designing a strip four-roll roll balance device with hydraulic cylinder and elastic damping body, the problems of complex structure and difficult maintenance of roll balance device in existing steel rolling equipment are solved, and the roll gap is eliminated and the rolling stable improvement is achieved.
Patent Information
- Application Number
- CN202323559842.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-26
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2033-12-26
AI Technical Summary
Among the existing steel rolling equipment, the rolling roll balance device has problems such as complex structure, difficulty in maintaining, large investment, and large space occupancy, which is difficult to meet the needs of modern high-precision rolling mills.
A strip steel four-roll rolling mill rolling mill rolling device is designed, and an upper balance device consisting of hydraulic cylinder, shoulder pole beam, hanging beam and balance beam is used. Combined with the lower balance device of upper and lower elastic damping bodies, the balance force is adjusted through the hydraulic cylinder, eliminate the roll gap, reduce the impact, and improve the rolling stability.
It realizes effective elimination of roll gaps, reduces impact during rolling process, improves rolling stability, is light in structure, convenient and reliable in rolling, and meets the efficient and stable requirements of modern steel rolling equipment.
Smart Images
Figure CN222535869U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of steel rolling production equipment, in particular to a roll balancing device for a strip steel four-roller rolling mill. Background Art
[0002] Steel rolling equipment is a professional equipment for metal rolling process. Due to its heavy workload, in practical application, in addition to effective fixing measures, corresponding balancing devices should be designed to ensure the stability of steel rolling mill. Roller balancing devices play an important role in balancing the gap between rollers. If there are no such balancing devices, the rolled piece will have a great impact on the rollers of the steel rolling mill before rolling begins, which will deteriorate the working conditions of the steel rolling mill and reduce the service life of the steel rolling mill. At the same time, these balancing devices reduce the gap between rollers and provide a good foundation for finishing rolling.
[0003] The most widely used balancing devices on rolling mills are spring balancing, weight balancing and hydraulic balancing. 1. Ordinary spring balancing is mainly used on rolling mills where the upper roll moves very little or very little. The spring is placed on the upper part of the frame cover, and the lower shoe seat of the upper roll is hung on the balancing device through a tie rod. When the upper roll descends, the spring is compressed and relaxed when it rises. Therefore, the balancing force of the spring is variable. The longer the spring, the more stable the balancing force. However, the elastic deformation range of the spring balance is small, and the spring is prone to creep and fail. 2. Weight balancing. The weight balancing device is widely used on rolling mills where the upper roll moves a lot and moves frequently. This balancing device uses a lever to transmit the balancing force of the weight to the upper roll bearing seat through a support beam and a top rod. The weight is usually installed under the working machine base. The weight balancing has a simple structure, a large adjustment height, and is more reliable. However, since a heavy weight is installed on the lower part of the machine base, the foundation is deepened and becomes complicated. 3. Hydraulic balancing. Hydraulic balance is widely used in modern high-precision rolling mills. This type of balancing device has various forms. Its advantages are that the adjustment part is compact and easy to operate, and roll changing and maintenance are relatively convenient; its disadvantages are that the adjustment height should not be too high, otherwise it will be difficult to manufacture and maintain; a dedicated hydraulic pump station is required, which requires a large investment. At the same time, space must be reserved in the workshop to place this device, and dedicated personnel must be assigned to manage and maintain it.
[0004] Based on the above reasons, there is an urgent need for a roll balancing device for a strip steel four-roller rolling mill that is light in structure, easy to replace, and can ensure smooth production. Utility Model Content
[0005] In view of the problems existing in the prior art, the utility model provides a roll balancing device for a strip steel four-roller rolling mill, and the utility model is implemented as follows:
[0006] A roll balancing device for a strip steel four-roll rolling mill, the four-roll rolling mill comprising upper and lower support rolls and upper and lower working rolls; the balancing device comprises an upper balancing device and a lower balancing device; the upper balancing device is arranged above the upper support roll, and specifically comprises a hydraulic cylinder, a shoulder pole beam, a hanging beam and a balancing beam; the shoulder pole beam is located above the upper platform of the frame and a hydraulic cylinder is connected between the two; the balancing beam is located below the upper platform of the frame, and the balancing beam and the shoulder pole beam are fixed as a whole through hanging beams symmetrically arranged on both sides of the hydraulic cylinder; the top of the bearing seat of the upper support roll is movably connected to the bottom of the hanging beam;
[0007] The lower balancing device comprises an upper elastic damping body and a lower elastic damping body; the upper elastic damping body is located between the bearing seat of the upper working roll and the bearing seat of the lower working roll; the lower elastic damping body is located between the bearing seat of the lower working roll and the bearing seat of the lower support roll.
[0008] Furthermore, the bottom of the hydraulic cylinder is fixed at the center of the upper platform of the frame, and the end of the piston rod of the hydraulic cylinder is fixed at the center of the shoulder pole beam.
[0009] Furthermore, a vertical hanging beam is symmetrically provided at the bottom on both sides of the center line of the shoulder pole beam, and the bottom of the hanging beam is fixed to the top of the balance beam.
[0010] Furthermore, the balance beam includes a counterweight block and a strip beam fixed at the bottom of the counterweight block.
[0011] Furthermore, grooves are provided at the tops of both sides of the bearing seat of the upper support roller along the axial direction, and the grooves are plugged into the strip beams.
[0012] Furthermore, an upper elastic damping body is connected to both sides of the bottom of the bearing seat of the upper working roll, and an upper fixed sleeve facing the upper elastic damping body is provided on the top of the bearing seat of the lower working roll.
[0013] Furthermore, an upper positioning pin is provided on one side of the upper elastic damping body; and an upper positioning hole matching with the upper positioning pin is provided on the bearing seat on the opposite side of the upper positioning pin.
[0014] Furthermore, a lower elastic damping body is connected to both sides of the bottom of the bearing seat of the lower working roll, and a lower fixing sleeve facing the lower elastic damping body is provided on the top of the bearing seat of the lower supporting roll.
[0015] Furthermore, a lower positioning pin is provided on one side of the lower elastic damping body; and a lower positioning hole matching with the lower positioning pin is provided on the bearing seat on the opposite side of the lower positioning pin.
[0016] The utility model has the following advantages and technical effects:
[0017] The utility model can eliminate the assembly gaps between the parts of the pressing system and between the support roller and the support roller bearing seat by arranging the upper balancing device, reduce the impact generated during the rolling process, improve the biting condition, and ensure the stability of the rolling.
[0018] The elastic damping body used in the lower balancing device has the functions of roll balancing and roll separation. The elastic damping body occupies a small volume, has a compact structure, accurate load, quick replacement, and convenient roll replacement. There is no problem of oil leakage and system repair and maintenance. It is less affected by the heat radiation of the steel billet, cooling water and oxide scale. The lower balancing device meets the requirements of no-load acceleration and deceleration of the working roll, and there is no slip between the working roll and the support roll. The elastic damping body is installed between the upper and lower working rolls, and between the lower working roll and the lower support roll. It can eliminate the gap between the working rolls, between the working rolls and the support rolls, and between the roll neck and the bearing in the bearing seat, reducing the impact during rolling. The positioning pin plays the role of positioning between the upper rolls of the rolls and between the working rolls and the support rolls. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a front view of the roll balancing device of the strip steel four-roller rolling mill of the utility model;
[0020] Figure 2 for Figure 2 Side view of.
[0021] In the figure: 1. hydraulic cylinder; 2. shoulder beam; 3. hanging beam; 4. balance beam; 5. upper platform of frame; 6. piston rod; 7. upper support roller; 8. upper working roller; 9. lower working roller; 10. lower support roller; 11. upper elastic damping body; 12. upper positioning pin; 13. upper fixing sleeve; 14. lower elastic damping body; 15. lower positioning pin; 16. lower fixing sleeve. DETAILED DESCRIPTION
[0022] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail in combination with the embodiments below. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.
[0023] The utility model discloses a roll balancing device for a strip steel four-roll rolling mill, the four-roll rolling mill comprises upper and lower support rolls and upper and lower working rolls; the balancing device comprises an upper balancing device and a lower balancing device; the upper balancing device is arranged above an upper support roll 7, and specifically comprises a hydraulic cylinder 1, a shoulder pole beam 2, a hanging beam 3 and a balancing beam 4; the shoulder pole beam 2 is located above an upper platform 5 of a frame and the two are connected as a whole through the hydraulic cylinder 1; specifically, the bottom of the hydraulic cylinder 1 is fixed at the center of the upper platform 5 of the frame, and the end of a piston rod 6 of the hydraulic cylinder 1 is fixed at the center of the shoulder pole beam 2.
[0024] The balance beam 4 is located below the upper platform 5 of the frame, and the balance beam 4 is fixed as a whole with the shoulder pole beam 2 through the hanging beam 3; specifically, a vertical hanging beam 3 is symmetrically provided at the bottom of the left and right sides of the center line of the shoulder pole beam 2, and the bottom of the hanging beam 3 is fixed to the top of the balance beam 4. Preferably, the balance beam includes a counterweight block and a strip beam fixed at the bottom of the counterweight block.
[0025] The upper bearing seat of the upper support roller 7 is provided with grooves in the axial direction at the upper position on both sides, and the grooves are plugged with the strip beam; when changing the roller, the balance beam is aligned and passed through the grooves, and the upper support roller can be hung on the balance beam. The hydraulic cylinder piston rod extends or retracts, driving the shoulder beam, the shoulder beam, the balance beam, and the upper support roller to move upward or downward. By adjusting the pressure of the hydraulic cylinder, an overbalance force is generated, which is used to eliminate the assembly gap between the various parts of the press-down system and between the support roller and the bearing seat of the support roller after cooperating with the rolling mill press-down device, reduce the impact generated during the rolling process, improve the bite conditions, and ensure the stability of rolling.
[0026] The lower balancing device includes an upper elastic damping body and a lower elastic damping body; the upper elastic damping body is located between the bearing seat of the upper working roll 8 and the bearing seat of the lower working roll 9; the lower elastic damping body is located between the bearing seat of the lower working roll 9 and the bearing seat of the lower support roll 10. The elastic damping body can eliminate the gap between the working rolls, between the working rolls and the support rolls, and between the roll neck and the bearing in the bearing seat, reduce the impact during the rolling process, and can also ensure the stability of the roll system when changing rolls.
[0027] Specifically, both sides of the bottom of the bearing seat of the upper working roll 8 are connected by bolts with an upper elastic damping body A11, and the top of the bearing seat of the lower working roll 9 is provided with an upper fixed sleeve 13 facing the upper elastic damping body 11; an upper positioning pin 12 is provided on one side of the upper elastic damping body 11; and an upper positioning hole matching the upper positioning pin 12 is provided on the bearing seat opposite to the upper positioning pin 12; similarly, both sides of the bottom of the bearing seat of the lower working roll 9 are connected by bolts with a lower elastic damping body 14, and the top of the bearing seat of the lower support roll 10 is provided with a lower fixed sleeve 16 facing the lower elastic damping body 14; a lower positioning pin 15 is provided on one side of the lower elastic damping body 14; and a lower positioning hole matching the lower positioning pin 15 is provided on the bearing seat opposite to the lower positioning pin 15. When the rolling mill is working, the bottoms of the upper and lower elastic damping bodies extend downward into the corresponding fixed sleeves, thereby reducing the impact during the rolling process; at the same time, the upper and lower positioning pins extend into the corresponding positioning holes to ensure that the docking positions of the upper and lower working rolls are symmetrical and stable.
[0028] After applying the four-roller rolling mill roll balancing device of the utility model, it has been verified through 10 months of use that the device has a light structure, convenient and reliable roll changing, good stability, and no slipping, large impact, or dimensional instability occurs during the process of billet biting and normal roll gap adjustment rolling, thus meeting the requirements of stable rolling.
[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A roll balancing device for a strip steel four-roll mill, the four-roll mill comprising upper and lower support rolls and upper and lower working rolls; characterized in that: The balancing device comprises an upper balancing device and a lower balancing device; the upper balancing device is arranged above the upper supporting roller, and specifically comprises a hydraulic cylinder, a shoulder pole beam, a hanging beam and a balancing beam; the shoulder pole beam is located above the upper platform of the frame and a hydraulic cylinder is connected between the two; the balancing beam is located below the upper platform of the frame, and the balancing beam and the shoulder pole beam are fixed as a whole through hanging beams symmetrically arranged on both sides of the hydraulic cylinder; the top of the bearing seat of the upper supporting roller is movably connected to the bottom of the hanging beam; The lower balancing device comprises an upper elastic damping body and a lower elastic damping body; the upper elastic damping body is located between the bearing seat of the upper working roll and the bearing seat of the lower working roll; the lower elastic damping body is located between the bearing seat of the lower working roll and the bearing seat of the lower support roll.
2. The roll balancing device for a four-high strip mill according to claim 1, characterized in that: The bottom of the hydraulic cylinder is fixed at the center of the upper platform of the frame, and the end of the piston rod of the hydraulic cylinder is fixed at the center of the shoulder pole beam.
3. The roll balancing device for a four-high strip mill according to claim 1, characterized in that: A vertical hanging beam is symmetrically arranged at the bottom of the left and right sides of the center line of the shoulder pole beam, and the bottom of the hanging beam is fixed to the top of the balance beam.
4. The roll balancing device for a four-high strip mill according to claim 1, characterized in that: The balance beam comprises a counterweight block and a strip beam fixed at the bottom of the counterweight block.
5. The roll balancing device for a four-high strip mill according to claim 4, characterized in that: The tops of both sides of the bearing seat of the upper support roller are provided with grooves along the axial direction, and the grooves are plugged into the strip beams.
6. The roll balancing device for a four-high strip mill according to claim 1, characterized in that: An upper elastic damping body is connected to both sides of the bottom of the bearing seat of the upper working roll, and an upper fixing sleeve facing the upper elastic damping body is arranged on the top of the bearing seat of the lower working roll.
7. The roll balancing device for a four-high strip mill according to claim 6, characterized in that: An upper positioning pin is arranged on one side of the upper elastic damping body; an upper positioning hole cooperating with the upper positioning pin is arranged on the bearing seat on the opposite side of the upper positioning pin.
8. The roll balancing device for a four-high strip mill according to claim 1, characterized in that: A lower elastic damping body is connected to both sides of the bottom of the bearing seat of the lower working roll, and a lower fixing sleeve facing the lower elastic damping body is provided on the top of the bearing seat of the lower supporting roll.
9. The roll balancing device for a four-high strip mill according to claim 8, characterized in that: A lower positioning pin is arranged on one side of the lower elastic damping body; and a lower positioning hole cooperating with the lower positioning pin is arranged on the bearing seat on the opposite side of the lower positioning pin.