Inclined push type loop device separated from rolling mill housing

Abstract

The utility model discloses an inclined push type loop device separated from a rolling mill housing, which is arranged at the bottom of strip steel and comprises a loop roller, a push rod, a push rod and a push rod, one end of the supporting arm is connected with the loop roller; the first supporting seat is arranged at the bottom of the device, and the other end of the supporting arm is connected with the top of the first supporting seat; a connecting shaft is arranged on the side wall of the supporting arm, and a loop oil cylinder is arranged at one end of the connecting shaft. A telescopic piston rod is arranged in the loop oil cylinder, one end of the telescopic piston rod is movably connected with the connecting shaft, and a second supporting seat is arranged at the other end of the telescopic piston rod. According to the device, the adjustment of different sleeve quantities of strip steel between the racks is realized, and the flexibility is improved; the influence of the loop device on the rigidity of the rolling mill housing in the dynamic control process is reduced, the rolling mill housing cannot be abraded, the service life of the rolling mill housing and the loop device is prolonged, in addition, the whole rolling mill housing does not need to be disassembled, and the maintenance efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hot-rolled strip steel production, in particular to an oblique push type looper device separated from a rolling mill arch. Background Art

[0002] The tension control of the looper device is the key to ensure the precision and quality of the hot-rolled finished strip. The role of the looper device can be summarized as follows: first, it buffers the change in the amount of strip caused by the fluctuation of the rolling speed between the stands; second, it adjusts the angle to ensure the constant metal flow rate of the strip during the continuous rolling process; finally, the looper roller lifts and tightens the strip to achieve micro-tension rolling, avoiding the influence of unstable tension on the thickness of the strip. The looper roller is usually a flat roller, that is, the diameter does not change in the axial direction. The flat roll and looper roller are easy to wear during the rolling process and have a short service life.

[0003] Chinese utility model patent CN202539219U discloses a finishing rolling looper roller capable of adjusting the deviation of the strip, and the roller concavity is in the range of -0.1mm-0. The concave looper roller mainly has the following two problems: on the one hand, considering the sickle bend or deviation of the strip, the friction direction of the concave looper roller is away from the rolling center line, which is not conducive to the control of the deviation of the strip; on the other hand, the temperature of the edge of the strip is lower than that of the middle part, and the concave looper roller increases the contact stress with the edge of the strip, which not only accelerates the wear of the contact area, but also easily causes defects such as edge cracks on the edge of the strip. Utility Model Content

[0004] The purpose of the utility model is to provide an oblique push type looper device separated from a rolling mill housing, so as to solve at least one aspect of the problems and defects raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] An oblique push type looper device separated from a rolling mill housing, arranged at the bottom of a strip, comprises:

[0007] A looper roller, the outer peripheral surface of which abuts against the bottom of the strip;

[0008] A support arm, one end of which is connected to the looper roller;

[0009] A first support seat, wherein the first support seat is arranged at the bottom of the device, and the other end of the support arm is connected to the top of the first support seat;

[0010] A connecting shaft is arranged on the side wall of the support arm, and a slip-on oil cylinder is arranged at one end of the connecting shaft;

[0011] A telescopic piston rod is arranged in the live sleeve oil cylinder, one end of the live telescopic piston rod is movably connected to the connecting shaft, and the other end of the telescopic piston rod is arranged with a second supporting seat.

[0012] The oblique push type looper device separated from the rolling mill arch according to this solution has at least the following technical effects:

[0013] By arranging the looper device separately from the rolling mill arch, the position, pressure and clearance of the looper device can be adjusted according to different processing requirements and rolling processes. The height of the looper roller can be adjusted by changing the length of the telescopic piston rod of the looper cylinder, so that different looping amounts of strip steel between frames can be adjusted, thereby improving the flexibility of the looper device; and avoiding the force exerted by the looper device from being transmitted to the rolling mill arch through the looper roller, thereby reducing the influence of the looper device on the rigidity of the rolling mill arch during dynamic control, and will not cause wear to the rolling mill arch, while improving the service life of the rolling mill arch and the looper device; in addition, there is no need to disassemble the entire rolling mill arch, only the looper device needs to be maintained and replaced, thereby improving maintenance efficiency.

[0014] As a further solution of the utility model: the looper roller is a convex roller, and its diameter gradually decreases from the center of the roller body to both ends.

[0015] Since the looper roller is convex, its diameter gradually decreases from the center of the roller body to both ends, so that the pressure applied by the looper roller on the bottom surface of the strip is more evenly distributed, achieving balanced pressing of the edge and center of the strip, reducing deformation and defects caused by uneven pressure, and the force applied by the edge of the roller will make the strip move closer to the center position, thereby preventing the strip from drifting sideways and ensuring stability and accuracy during the rolling process.

[0016] As a further solution of the utility model: the length of the looping roller is 2L, and the axial roller radius curve function is D(x), where x∈[-L, L], the radius of the roller body at both ends of the looping roller is DDS(-L)=DOS(L)=Min[D(x)], and the radius of the roller body center of the looping roller is D0=Max[D(x)].

[0017] The length of the roller body of the loop roller is 2L, 2L=2200mm, and the roller base radius is D0, D0=272.4mm. The radius at both ends of the roller body is the smallest, which can enhance the transmission performance and operating performance and enhance the stability of the device; the radius at the center of the roller body is the largest to increase the contact area with the bottom of the strip and provide better support.

[0018] As a further solution of the utility model: the roller radius curve function in the axial direction of the looper roller is D(x)=D0+d(x)+H.

[0019] The thickness of the spray-welded layer of the looper roller is H, and H is 1 mm. The change of the roller radius curve can optimize the contact between the looper roller and the bottom surface of the strip, reduce poor contact and slippage, and the change of the looper roller radius can form a more uniform and stable pressure distribution in the contact area, thereby increasing the contact rate and friction effect between the looper roller and the strip, which is beneficial to improving the rolling effect and rolling quality.

[0020] As a further solution of the utility model: the roller shape curve function of the looper roller is d(x)=ax2+b, x∈[-L,L].

[0021] The change of the roll shape curve can optimize the pressing force distribution of the looper roll at the bottom of the strip, and by adjusting the curve parameters, local pressure regulation at different positions can be achieved, which helps to reduce deformation and defects caused by uneven pressure and further improve the rolling quality.

[0022] As a further solution of the utility model: the coefficients of the looper roller shape curve function d(x) are a=-C / L2, b=C, C=5μm~20μm, where C is the convexity value of the looper roller shape radius.

[0023] The convexity value C in the roller curve function can be adjusted according to actual needs. By adjusting the value of C, the convexity of the roller shape can be changed, the distribution adjustment of local pressure at different positions can be achieved, and the friction and wear of the looper roller on the bottom surface of the strip can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0025] Figure 1 It is a schematic diagram of the working state structure of an oblique push type looper device separated from the rolling mill arch;

[0026] Figure 2 The diagram is a schematic diagram of the structure of the looper roller of an oblique push looper device separated from the rolling mill arch.

[0027] Reference numerals:

[0028] 101. Strip steel; 102. Loop roller; 103. Support arm; 104. First support seat; 105. Connecting shaft; 106. Loop cylinder; 107. Telescopic piston rod; 108. Second support seat. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0032] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0033] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model, that is, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the utility model provided in the accompanying drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents selected embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0035] like Figure 1The embodiment of the utility model shown is an oblique push type looper device separated from the rolling mill arch, arranged at the bottom of the strip 101, comprising: a looper roller 102, the outer peripheral surface of the looper roller 102 abuts against the bottom of the strip 101; a support arm 103, one end of the support arm 103 is connected to the looper roller 102; a first support seat 104, the first support seat 104 is arranged at the bottom of the device, and the other end of the support arm 103 is connected to the top of the first support seat 104; a connecting shaft 105 is arranged on the side wall of the support arm 103, and a looper cylinder 106 is arranged at one end of the connecting shaft 105; a telescopic piston rod 107 is arranged in the looper cylinder 106, one end of the telescopic piston rod 107 is movably connected to the connecting shaft 105, and the other end of the telescopic piston rod 107 is provided with a second support seat 108.

[0036] Specifically, by arranging the looper device separately from the rolling mill arch, the position, pressure and clearance of the looper device can be adjusted according to different processing requirements and rolling processes. The height of the looper roller 102 can be adjusted by changing the length of the telescopic piston rod 107 of the looper cylinder 106, so that different looping amounts of the strip 101 between the frames can be adjusted, thereby improving the flexibility of the looper device; and avoiding the force exerted by the looper device from being transmitted to the rolling mill arch through the looper roller, thereby reducing the influence of the looper device on the stiffness of the rolling mill arch during dynamic control, and will not cause wear to the rolling mill arch, while improving the service life of the rolling mill arch and the looper device; in addition, there is no need to disassemble the entire rolling mill arch, only the looper device needs to be maintained and replaced, thereby improving maintenance efficiency.

[0037] like Figure 2 As shown, the looper roller 102 is a convex roller, and its diameter gradually decreases from the center of the roller body to both ends.

[0038] Specifically, since the loop roller 102 is a convex roller, its diameter gradually decreases from the center of the roller body to both ends, so that the pressure applied by the loop roller 102 on the bottom surface of the strip 101 is more evenly distributed, achieving balanced pressing of the edge and the center of the strip 101, reducing deformation and defects caused by uneven pressure, and the force applied by the edge of the roller will make the strip 101 move closer to the center position, thereby preventing the strip 101 from drifting lateraly and ensuring stability and accuracy during the rolling process.

[0039] According to an embodiment of the utility model, the length of the looping roller 102 is 2L, and the axial roller body radius curve function is D(x), where x∈[-L, L], the radius of the roller body at both ends of the looping roller 102 is DDS(-L)=DOS(L)=Min[D(x)], and the radius of the roller body center of the looping roller 102 is D0=Max[D(x)].

[0040] Specifically, the roller body length of the loop roller 102 is 2L, 2L=2200mm, and the roller base radius D0, D0=272.4mm. The radius at both ends of the roller body is the smallest, so that the transmission performance and operating performance can be enhanced, and the stability of the device is enhanced; the radius at the center position of the roller body is the largest to increase the contact area with the bottom of the strip 101 and provide better support.

[0041] In addition, the roller radius curve function of the looper roller 102 in the axial direction is D(x)=D0+d(x)+H.

[0042] Specifically, the thickness of the spray-welded layer of the looper roller is H, and H is 1 mm. The change of the roller radius curve can optimize the contact between the looper roller 102 and the bottom surface of the strip 101, reduce poor contact and slippage, and the change of the radius of the looper roller 102 can form a more uniform and stable pressure distribution in the contact area, thereby improving the contact rate and friction effect between the looper roller 102 and the strip 101, which is beneficial to improving the rolling effect and rolling quality.

[0043] In addition, the roller shape curve function of the looper roller 102 is d(x)=ax2+b, x∈[-L,L].

[0044] Specifically, the change of the roller curve can optimize the pressing force distribution of the loop roller 102 at the bottom of the strip 101, and by adjusting the curve parameters, local pressure regulation at different positions can be achieved, which helps to reduce deformation and defects caused by uneven pressure and further improve the rolling quality.

[0045] Furthermore, the coefficients of the roller curve function d(x) of the looper roller 102 are a=-C / L2, b=C, C=5μm~20μm, where C is the convexity value of the roller radius of the looper roller 102.

[0046] Specifically, the convexity value C in the roller curve function can be adjusted according to actual needs. By adjusting the value of C, the convexity of the roller shape can be changed, the distribution adjustment of local pressure at different positions can be achieved, and the friction and wear of the looper roller 102 on the bottom surface of the strip 101 can be reduced.

[0047] The above contents are merely examples and explanations of the structure of the utility model. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of the utility model.

Claims

1. An oblique push type looper device separated from a rolling mill housing, arranged at the bottom of a steel strip (101), characterized in that: include: A looper roller (102), wherein the outer peripheral surface of the looper roller (102) abuts against the bottom of the strip steel (101); A support arm (103), one end of the support arm (103) being connected to the looper roller (102); A first support seat (104), wherein the first support seat (104) is arranged at the bottom of the device, and the other end of the support arm (103) is connected to the top of the first support seat (104); A connecting shaft (105) is arranged on the side wall of the supporting arm (103), and a slip-on oil cylinder (106) is arranged at one end of the connecting shaft (105); A telescopic piston rod (107) is arranged in the slip-on oil cylinder (106), one end of the telescopic piston rod (107) is movably connected to the connecting shaft (105), and the other end of the telescopic piston rod (107) is arranged with a second supporting seat (108).

2. The oblique push type looper device separated from the rolling mill arch according to claim 1 is characterized in that: The looper roller (102) is convex, and its diameter gradually decreases from the center of the roller body to both ends.

3. The oblique push type looper device separated from the rolling mill arch according to claim 2 is characterized in that: The length of the looping roller (102) is 2L, and the axial roller body radius curve function is D(x), where x∈[-L, L], the radii of the roller bodies at both ends of the looping roller (102) are DDS(-L)=DOS(L)=Min[D(x)], and the radius of the roller body center of the looping roller (102) is D0=Max[D(x)].

4. The oblique push type looper device separated from the rolling mill arch according to claim 3 is characterized in that: The roller radius curve function of the axial direction of the looper roller (102) is D(x)=D0+d(x)+H.

5. The oblique push type looper device separated from the rolling mill arch according to claim 4 is characterized in that: The roller shape curve function of the looper roller (102) is d(x)=ax2+b, x∈[-L,L].

6. The oblique push type looper device separated from the rolling mill arch according to claim 5 is characterized in that: The coefficients of the roller curve function d(x) of the looper roller (102) are a=-C / L2, b=C, C=5μm to 20μm, wherein C is the roller radius convexity value of the looper roller (102).

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