Working roll bending device of rolling mill and rolling mill

Abstract

The utility model discloses a working roll bending device of a rolling mill and the rolling mill, belongs to the technical field of steel rolling equipment, and aims to solve the problem that an existing piston rod guide type working roll bending device is easy to leak oil when working for a long time. The working roll bending device of the rolling mill comprises an upper roll bending mechanism (31) and a lower roll bending mechanism (32) which are arranged up and down; the upper roll bending mechanism (31) comprises a T-shaped guide block (312), and an upper sliding plate group (313) is arranged between the upper cylinder barrel (3111) and the T-shaped guide block (312); the lower roll bending mechanism (32) comprises a guide column (322), and a lower sliding plate set (323) is arranged between the guide column (322) and the lower cylinder barrel (3211). The working roll bending device of the rolling mill comprises the upper sliding plate set and the lower sliding plate set, the guiding effect can be further enhanced, and the problem of oil leakage caused by the fact that an upper roll bending cylinder and a lower roll bending cylinder bear lateral force is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of steel rolling equipment, in particular to a working roll bending device of a rolling mill, and also to a rolling mill. Background Art

[0002] In medium and thick plate mills, the work roll bending device is the most fundamental method for plate shape control. The work roll bending device uses a hydraulic cylinder to apply a bending force to the work roll bearing seat, causing the work roll to flex and deform. This compensates for changes in the loaded roll gap caused by factors such as rolling pressure and temperature, thereby achieving a good plate shape. Currently, common work roll bending devices are classified into two main structures. One is the piston rod unguided type, in which the end of the piston rod directly rests on the work roll bearing seat during operation. This structure directly subjects the piston rod to lateral forces, which can severely damage the seals and guide rings, causing oil leakage in the bending cylinder. The other is the piston rod guided type, in which a guide device is installed on the outside of the piston rod to guide the piston rod during operation. However, this structure places high demands on the guide device, and severe wear can also cause oil leakage in the bending cylinder. Utility Model Content

[0003] In order to solve the problem that the above-mentioned piston rod guided working roll bending device is prone to oil leakage during long-term operation, the utility model provides a working roll bending device of a rolling mill and a rolling mill. The working roll bending device of the rolling mill contains an upper slide group and a lower slide group, which can further enhance the guiding effect and avoid the oil leakage problem caused by the lateral force exerted on the upper bending roll cylinder and the lower bending roll cylinder.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A working roll bending device of a rolling mill comprises an upper bending roll mechanism and a lower bending roll mechanism arranged up and down; the upper bending roll mechanism comprises an upper bending roll cylinder and a T-shaped guide block arranged left and right, the upper bending roll cylinder comprises an upper cylinder barrel and an upper piston rod, the T-shaped guide block can be connected and fixed to the rolling mill arch, the upper cylinder barrel can move up and down relative to the T-shaped guide block, and an upper slide plate group is arranged between the upper cylinder barrel and the T-shaped guide block; the lower bending roll mechanism comprises a lower bending roll cylinder and a guide column arranged up and down, the lower bending roll cylinder comprises a lower cylinder barrel and a lower piston rod, the lower cylinder barrel can be connected and fixed to the rolling mill arch, the lower bending roll cylinder can drive the guide column to move up and down, and a lower slide plate group is arranged between the guide column and the lower cylinder barrel.

[0006] The cross-section of the T-shaped guide block is T-shaped. The T-shaped guide block contains a head section and a body section arranged on the left and right. The width of the head section is greater than the width of the body section. The T-shaped guide block extends in the up and down directions. The upper cylinder contains a plug-in groove. The T-shaped guide block is plugged into the plug-in groove. The head section contains the right front side of the head, the front side of the head, the left side of the head, the rear side of the head and the right rear side of the head connected in sequence. The body section contains the front side of the body and the rear side of the body arranged at intervals from front to back.

[0007] The upper slide group includes a first upper slide and a second upper slide, the first upper slide is matched, stacked, and fixed to the front side and the rear side of the body; the cross-section of the second upper slide is a right-angle structure, the second upper slide is matched, stacked, and fixed to the right front side and the front side of the head, and the first upper slide is also matched, stacked, and fixed to the rear side and the right rear side of the head.

[0008] The upper slide plate group also includes a third upper slide plate, and the third upper slide plate is matched, stacked, connected and fixed to the left side of the head.

[0009] The first upper slide plate and the second upper slide plate are both slidably connected to the upper cylinder barrel, and there is a gap of 0.5mm-1mm between the third upper slide plate and the upper cylinder barrel.

[0010] The right side of the upper cylinder is fixedly connected with an upper guide slide, and the upper guide slide is slidably connected to the rolling mill arch.

[0011] The guide column comprises an upright column and a bottom plate which are connected up and down. The upper end of the upright column is plugged into the lower cylinder barrel, and the bottom plate is located in the lower end of the lower cylinder barrel.

[0012] The lower slide plate group comprises a first lower slide plate, which is fixed to the left side and the right side of the bottom plate and is slidably connected to the lower cylinder.

[0013] The lower slide plate group also includes a second lower slide plate, which is fixed to the front side surface and the rear side surface of the base plate, and the second lower slide plate is slidably connected to the lower cylinder.

[0014] A rolling mill, comprising a working roll device, a rolling mill arch and a working roll bending device, wherein the working roll bending device is the working roll bending device of the above-mentioned rolling mill, the working roll device comprises an upper bearing seat and a lower bearing seat, a T-shaped guide block is connected and fixed to the rolling mill arch, a lower cylinder is connected and fixed to the rolling mill arch, an upper cylinder abuts against the upper bearing seat, and a guide column abuts against the lower bearing seat.

[0015] The beneficial effects of the utility model are:

[0016] 1. An upper slide plate group is set between the upper bending roller cylinder and the T-shaped guide block to further enhance the guiding effect and avoid oil leakage caused by the lateral force on the upper bending roller cylinder.

[0017] 2. The lower slide plate group is fixedly connected around the guide column. Within the travel range, it can serve as the sliding surface for the guide column and the lower bending roller cylinder, which can greatly improve the guiding ability and avoid the oil leakage problem caused by the lateral force of the lower bending roller cylinder.

[0018] 3. The adopted slide plate is relatively low in cost and easy to replace and maintain. It plays a good guiding role on the basis of saving costs, greatly improving the stability of the operation of the working roll bending device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings in the specification, which constitute a part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0020] Figure 1 It is a schematic diagram of the main view of the rolling mill of the present invention.

[0021] Figure 2 It is a schematic diagram of the working roll bending device of the rolling mill described in the present invention.

[0022] Figure 3 yes Figure 2 Enlarged schematic diagram of area A in the middle.

[0023] Figure 4 It is along Figure 2 Schematic cross-sectional view in the DD direction.

[0024] Figure 5 yes Figure 4 Schematic diagram of the enlarged portion B.

[0025] Figure 6 It is along Figure 2 Schematic cross-sectional view in the EE direction.

[0026] Figure 7 It is a cross-sectional diagram of a T-type guide block.

[0027] Figure 8 yes Figure 6 Enlarged schematic diagram of part C in the middle.

[0028] Description of reference numerals:

[0029] 1. Work roll device; 2. Rolling mill housing; 3. Work roll bending device;

[0030] 11. Upper bearing seat; 12. Lower bearing seat;

[0031] 21. Upper guide slide;

[0032] 31. Upper bending roller mechanism; 32. Lower bending roller mechanism;

[0033] 311. Upper bending roll cylinder; 312. T-shaped guide block; 313. Upper slide plate group; 314. Upper guide slide plate; 315. Upper end cover;

[0034] 321. Lower bending roll cylinder; 322. Guide post; 323. Lower slide plate group; 324. Bush; 325. Lower end cover;

[0035] 3111. Upper cylinder barrel; 3112. Upper piston rod; 3113. Insertion groove;

[0036] 3121. Head section; 3122. Body section; 3123. Right front side of head; 3124. Front side of head; 3125. Left side of head; 3126. Rear side of head; 3127. Right rear side of head; 3128. Front side of body; 3129. Rear side of body;

[0037] 3131. First upper slide plate; 3132. Second upper slide plate; 3133. Third upper slide plate;

[0038] 3211. Lower cylinder barrel; 3212. Lower piston rod;

[0039] 3221. Column; 3222. Base plate;

[0040] 3231. First lower slide plate; 3232. Second lower slide plate. Detailed implementation mode

[0041] It should be noted that, without conflict, the embodiments and features in the embodiments of this application can be combined with each other. The following will describe the present utility model in detail with reference to the drawings and in combination with the embodiments.

[0042] For the convenience of understanding and description, an absolute positional relationship is adopted in the following description of the present utility model. Without special explanation, the orientation word "upper" herein represents Figure 2 the upper side direction in Figure 2 the orientation word "lower" represents Figure 2 the lower side direction in Figure 2 the orientation word "left" represents Figure 2 the left side direction in Figure 2 the orientation word "right" represents

[0043] the orientation word "front" represents the direction perpendicular to Figures 1 to 8As shown, a working roll bending device of a rolling mill described in an embodiment of the present invention includes an upper bending roll mechanism 31 and a lower bending roll mechanism 32 arranged above and below; the upper bending roll mechanism 31 includes an upper bending roll cylinder 311 and a T-shaped guide block 312 arranged on the left and right, the upper bending roll cylinder 311 includes an upper cylinder barrel 3111 and an upper piston rod 3112, the T-shaped guide block 312 can be connected and fixed to the rolling mill arch 2, and the upper cylinder barrel 3111 can move up and down relative to the T-shaped guide block 312 An upper slide group 313 is arranged between the upper cylinder 3111 and the T-shaped guide block 312; the lower bending roller mechanism 32 contains a lower bending roller cylinder 321 and a guide column 322 arranged up and down, the lower bending roller cylinder 321 contains a lower cylinder 3211 and a lower piston rod 3212, the lower cylinder 3211 can be connected and fixed to the rolling mill arch 2, the lower bending roller cylinder 321 can drive the guide column 322 to move up and down, and a lower slide group 323 is arranged between the guide column 322 and the lower cylinder 3211.

[0044] An upper slide assembly 313 is provided between the upper cylinder 3111 and the T-shaped guide block 312 to further enhance the guiding function and prevent oil leakage caused by lateral forces acting on the upper bending roll cylinder 311. A lower slide assembly 323 is provided between the guide post 322 and the lower cylinder 3211. Within the travel range, it serves as a sliding surface for the guide post and the lower bending roll cylinder, significantly improving the guiding capability, reducing or preventing oil leakage caused by lateral forces acting on the lower bending roll cylinder, and extending the service life of the work roll bending device of the rolling mill.

[0045] like Figures 6 to 8 As shown, the cross-section of the T-shaped guide block 312 is T-shaped, and the cross-section of the T-shaped guide block 312 extends in the up and down directions. The T-shaped guide block 312 includes a head section 3121 and a body section 3122 arranged on the left and right. The width H of the head section 3121 is greater than the width h of the body section 3122. The upper cylinder 3111 contains a plug-in groove 3113, and the T-shaped guide block 312 is matched and plugged into the plug-in groove 3113.

[0046] like Figure 7 As shown, the head section 3121 includes a right front side 3123, a front side 3124, a left side 3125, a rear side 3126, and a right rear side 3127, which are sequentially connected along the circumferential direction. The body section 3122 includes a front side 3128 and a rear side 3129, which are arranged parallel to each other in a front-to-back manner. The rear end of the right front side 3123 is connected to the left end of the front side 3128, and the front end of the right rear side 3127 is connected to the left end of the rear side 3129.

[0047] like Figures 6 to 8As shown, the upper slide plate group 313 contains a first upper slide plate 3131 and a second upper slide plate 3132. The first upper slide plate 3131 is matched with the front side 3128 of the body and the rear side 3129 of the body, and is stacked and fixed. The cross-section of the second upper slide plate 3132 is a right-angle structure. The second upper slide plate 3132 is matched with the front right side 3123 of the head and the front side 3124 of the head, and is also matched with the rear side 3126 of the head and the rear right side 3127 of the head, and is stacked and fixed.

[0048] The first upper slide 3131 and the second upper slide 3132 are both long strip structures. The first upper slide 3131 and the second upper slide 3132 extend in the up and down directions. The first upper slide 3131 and the second upper slide 3132 are both fixed to the T-shaped guide block 312 by bolts.

[0049] The upper slide assembly 313 further includes a third upper slide 3133, which is matched and stacked with the left side of the head 3125. The third upper slide 3133 is an elongated structure that extends in the vertical direction and is fixed to the T-shaped guide block 312 via bolts.

[0050] The first upper slide 3131 and the second upper slide 3132 are both slidably connected to the upper cylinder 3111, and a gap of 0.5mm-1mm exists between the third upper slide 3133 and the upper cylinder 3111. Thus, the first and second upper slides 3131, 3132 initially contact the upper cylinder 3111. After a period of wear (the first and second upper slides 3131, 3132), the third upper slide 3133 resumes contact (sliding connection) with the upper cylinder 3111. This dual-level, dual-guide structure further enhances the guiding effect and prevents oil leakage caused by lateral forces acting on the upper bending roller cylinder.

[0051] like Figures 6 to 8 As shown, an upper guide slide 314 is fixedly connected to the right side of the upper cylinder 3111. The rolling mill housing 2 includes an upper guide slide 21. The upper guide slide 314 is slidably connected to the upper guide slide 21 of the rolling mill housing 2. The upper guide slide 314 and the upper guide slide 21 are both elongated structures. Both the upper guide slide 314 and the upper guide slide 21 extend in the vertical direction. The upper guide slide 314 is fixed to the upper cylinder 3111 by bolts.

[0052] Guide column 322 consists of a vertical column 3221 and a bottom plate 3222 connected in an upper and lower manner. The upper end of column 3221 is inserted into lower cylinder 3211, while a portion (or all) of bottom plate 3222 is located within the lower end of lower cylinder 3211. A sleeve 324 is positioned between column 3221 and lower cylinder 3211, serving as a sliding surface. A lower piston rod 3212 and bottom plate 3222 are positioned vertically and secured to each other via bolts.

[0053] like Figures 2 to 5 As shown, the lower slide assembly 323 includes a first lower slide 3231, which is fixed to the left and right sides of the bottom plate 3222 and is slidably connected to the lower cylinder 3211. The first lower slide 3231 is a long strip structure, extending in the front-to-back direction, and is fixed to the bottom plate 3222 by bolts.

[0054] The lower slide assembly 323 further includes a second lower slide 3232, which is fixed to the front and rear sides of the bottom plate 3222 and is slidably connected to the lower cylinder 3211. The second lower slide 3232 is an elongated structure that extends in the front-to-back direction and is fixed to the bottom plate 3222 by bolts.

[0055] In addition, the upper bending roller cylinder 311 further includes an upper end cover 315, which is bolted to the upper cylinder 3111. The lower bending roller cylinder 321 further includes a lower end cover 325, which is bolted to the lower cylinder 3211. The first upper slide 3131, the second upper slide 3132, the third upper slide 3133, the upper guide slide 314, the first lower slide 3231, and the second lower slide 3232 can all be made of existing materials used to manufacture slides, rails, or slideways.

[0056] The following describes a rolling mill, which includes a working roll device 1, a rolling mill arch 2, and a working roll bending device 3. The working roll bending device 3 is the working roll bending device of the rolling mill mentioned above. The working roll device 1 includes an upper bearing seat 11 and a lower bearing seat 12. The T-shaped guide block 312 is fixedly connected to the rolling mill arch 2, the lower cylinder 3211 is fixedly connected to the rolling mill arch 2, the upper cylinder 3111 abuts against the upper bearing seat 11, and the guide column 322 abuts against the lower bearing seat 12. Figure 1 shown.

[0057] The two pairs of work roll bending devices 3 are symmetrically arranged. Each pair includes a work roll bending device 3 spaced apart from each other. That is, a rolling mill includes four work roll bending devices 3. The T-shaped guide block 312 is bolted to the mill housing 2. The lower cylinder 3211 is also bolted to the mill housing 2. The lower end of the upper piston rod 3112 abuts the upper surface of the lower cylinder 3211.

[0058] The working process of the rolling mill and the work roll bending device 3 is described below.

[0059] The upper cylinder 3111 abuts against the upper bearing seat 11 , the guide column 322 abuts against the lower bearing seat 12 , and the lower end of the upper piston rod 3112 abuts against the upper surface of the lower cylinder 3211 .

[0060] When the upper bending roll cylinder 311 is in the oil-intake load state, since the bottom of the upper piston rod 3112 is fixed against the upper cylinder 3111, the upper cylinder 3111 moves upward along the vertical guide of the T-shaped guide block 312, driving the work roll to form a positive bend, and the final bending roll force is determined according to the plate shape control process. During the upward movement of the upper cylinder 3111, the first upper slide 3131, the second upper slide 3132, and the third upper slide 3133 are all slidably connected to the upper cylinder 3111, that is, the first upper slide 3131, the second upper slide 3132, and the third upper slide 3133 are all in contact with the upper cylinder 3111, and the first upper slide 3131, the second upper slide 3132, and the third upper slide 3133 are able to slide relative to the upper cylinder 3111.

[0061] At the same time, when the lower bending roll cylinder 321 is in the oil-intake load state, since the lower cylinder barrel 3211 is fixed to the rolling mill housing 2, the lower piston rod 3212 drives the guide column 322 to move downward, driving the work rolls to form a positive bend, and the final bending roll force is determined according to the plate shape control process. During the downward movement of the guide column 322, the first lower slide plate 3231 and the second lower slide plate 3232 are both slidably connected to the lower cylinder barrel 3211, that is, the first lower slide plate 3231 and the second lower slide plate 3232 are both in contact with the lower cylinder barrel 3211, and the first lower slide plate 3231 and the second lower slide plate 3232 are able to slide relative to the lower cylinder barrel 3211.

[0062] The above description is merely a specific embodiment of the present invention and should not be construed as limiting the scope of the present invention. Therefore, substitutions of equivalent components, or equivalent variations and modifications made within the scope of protection of the present invention, should still fall within the scope of the present invention. Furthermore, the technical features of the present invention may be freely combined with one another, with other technical solutions, and with other technical solutions.

Claims

1. A work roll bending device for a rolling mill, characterized in that: The working roll bending device of the rolling mill comprises an upper roll bending mechanism (31) and a lower roll bending mechanism (32) arranged above and below; The upper bending roller mechanism (31) comprises an upper bending roller cylinder (311) and a T-shaped guide block (312) arranged on the left and right sides. The upper bending roller cylinder (311) comprises an upper cylinder barrel (3111) and an upper piston rod (3112). The T-shaped guide block (312) can be connected and fixed to the rolling mill archway (2). The upper cylinder barrel (3111) can move up and down relative to the T-shaped guide block (312). An upper slide plate group (313) is arranged between the upper cylinder barrel (3111) and the T-shaped guide block (312). The lower bending roller mechanism (32) includes a lower bending roller cylinder (321) and a guide column (322) arranged up and down. The lower bending roller cylinder (321) includes a lower cylinder barrel (3211) and a lower piston rod (3212). The lower cylinder barrel (3211) can be connected and fixed to the rolling mill archway (2). The lower bending roller cylinder (321) can drive the guide column (322) to move up and down. A lower slide plate group (323) is provided between the guide column (322) and the lower cylinder barrel (3211).

2. The work roll bending device of a rolling mill according to claim 1, characterized in that: The cross section of the T-shaped guide block (312) is T-shaped. The T-shaped guide block (312) includes a head section (3121) and a body section (3122) arranged on the left and right sides. The width of the head section (3121) is greater than the width of the body section (3122). The T-shaped guide block (312) extends in the up-down direction. The upper cylinder (3111) includes a plug-in groove (3113). The T-shaped guide block (312) is plugged into the plug-in groove (3113). The head section (3121) includes a right front side surface (3123) of the head, a front side surface (3124) of the head, a left side surface (3125) of the head, a rear side surface (3126) of the head, and a right rear side surface (3127) of the head, which are connected in sequence. The body section (3122) includes a front side surface (3128) of the body and a rear side surface (3129) of the body arranged at intervals from front to back.

3. The work roll bending device of a rolling mill according to claim 2, characterized in that: The upper slide plate group (313) includes a first upper slide plate (3131) and a second upper slide plate (3132). The first upper slide plate (3131) is matched with the front side surface (3128) and the rear side surface (3129) of the body, and is connected and fixed in a stacked manner. The cross section of the second upper slide plate (3132) is a right-angle structure. The second upper slide plate (3132) is matched with the right front side surface (3123) and the front side surface (3124) of the head, and is connected and fixed in a stacked manner. The first upper slide plate (3131) is also matched with the rear side surface (3126) and the right rear side surface (3127) of the head, and is connected and fixed in a stacked manner.

4. The work roll bending device of a rolling mill according to claim 3, characterized in that: The upper slide plate group (313) further comprises a third upper slide plate (3133), and the third upper slide plate (3133) and the left side surface (3125) of the head are matched, stacked, connected and fixed.

5. The work roll bending device of a rolling mill according to claim 4, characterized in that: The first upper slide plate (3131) and the second upper slide plate (3132) are both slidably connected to the upper cylinder (3111), and there is a gap of 0.5mm-1mm between the third upper slide plate (3133) and the upper cylinder (3111).

6. The work roll bending device of a rolling mill according to claim 1, characterized in that: The right side of the upper cylinder (3111) is fixedly connected with an upper guide slide (314), and the upper guide slide (314) is slidably connected to the rolling mill arch (2).

7. The work roll bending device of a rolling mill according to claim 1, characterized in that: The guide column (322) comprises a vertical column (3221) and a bottom plate (3222) connected up and down. The upper end of the vertical column (3221) is inserted into the lower cylinder (3211), and the bottom plate (3222) is located in the lower end of the lower cylinder (3211).

8. The work roll bending device of a rolling mill according to claim 7, characterized in that: The lower slide plate group (323) includes a first lower slide plate (3231), which is fixed to the left and right sides of the bottom plate (3222), and the first lower slide plate (3231) is slidably connected to the lower cylinder (3211).

9. The work roll bending device of a rolling mill according to claim 8, characterized in that: The lower slide plate assembly (323) further includes a second lower slide plate (3232), which is fixed to the front side and the rear side of the bottom plate (3222), and the second lower slide plate (3232) is slidably connected to the lower cylinder (3211).

10. A rolling mill, characterized in that: The rolling mill includes a working roll device (1), a rolling mill arch (2) and a working roll bending device (3), the working roll bending device (3) is the working roll bending device of the rolling mill according to claim 1, the working roll device (1) contains an upper bearing seat (11) and a lower bearing seat (12), the T-shaped guide block (312) is connected and fixed to the rolling mill arch (2), the lower cylinder (3211) is connected and fixed to the rolling mill arch (2), the upper cylinder (3111) is in contact with the upper bearing seat (11), and the guide column (322) is in contact with the lower bearing seat (12).

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