Working roll shifting device and rolling mill

Abstract

The utility model discloses a working roll shifting device and a rolling mill, belongs to the technical field of steel rolling equipment, and aims to solve the problem that a cylinder rod of a hydraulic cylinder in an existing eccentric roll shifting structure is easy to break, the working roll shifting device comprises a roll shifting rack (11), a guide block (12) and a roll shifting hydraulic cylinder (19), and the roll shifting hydraulic cylinder (19) comprises a roll shifting cylinder rod (1901). The roll shifting cylinder rod (1901) comprises a head section (1902) and a rod section (1903) which are connected front and back, a spherical crown surface of the head section (1902) is sleeved with a first spherical pad (15) and a second spherical pad (16), and the first spherical pad (15) and the second spherical pad (16) are sleeved with hoops (116). According to the working roll shifting device, the front end of the cylinder rod of the roll shifting hydraulic cylinder is of a spherical structure and is wrapped by the first spherical pad and the second spherical pad, and the outside of the cylinder rod is locked through the steel hoop, so that the unbalance loading resistance can be greatly improved, and the service life is prolonged.

Description

Technical Field

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

[0002] In the field of medium and thick plate rolling mills, the roll shifting device is the preferred measure to control the plate shape and even out the wear of the working rolls. It also plays a certain role in improving the bending efficiency of the rolls, reducing excessive deflection of the working rolls, and reducing the harmful contact area. According to the requirements of the thickness variation range of the rolled product, the roll shifting device must not only assume the function of plate shape control, but also meet the axial locking function of the full stroke range. According to the structure and layout of the roll shifting cylinder, the existing roll shifting devices are mainly divided into two categories. One is a coaxial roll shifting structure, that is, there is no eccentric distance between the axial force of the working roll and the roll shifting cylinder, and no eccentric load torque is generated. The other is an eccentric roll shifting structure, that is, the axial force of the working roll and the roll shifting cylinder generate an eccentric distance, and the eccentric load torque is proportional to the eccentric distance. A large eccentric torque can easily cause the hydraulic cylinder rod in the roll shifting device to break. Utility Model Content

[0003] In order to solve the problem that the cylinder rod of the hydraulic cylinder in the above-mentioned eccentric roll shifting structure is easily broken, the utility model provides a working roll shifting device and a rolling mill. The front end of the cylinder rod of the shifting hydraulic cylinder in the working roll shifting device adopts a spherical structure and is covered by a first spherical pad and a second spherical pad. The outside of the first spherical pad and the second spherical pad are then locked with steel hoops, which can greatly improve the anti-eccentric load capability and increase the service life.

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

[0005] A working roll shifting device comprises a shifting roll frame, a guide block and a shifting roll hydraulic cylinder, the guide block and the shifting roll hydraulic cylinder are arranged front and back on the shifting roll frame, the shifting roll hydraulic cylinder can drive the guide block to move back and forth, a first mounting hole is arranged in the rear end of the guide block, the shifting roll hydraulic cylinder contains a shifting roll cylinder rod, the shifting roll cylinder rod contains a head section and a rod section connected front and back, the head section is a spherical segment structure, the diameter of the head section is larger than the diameter of the rod section, the head section is located in the first mounting hole, the spherical crown surface of the head section is provided with a first spherical pad and a second spherical pad, the first spherical pad and the second spherical pad are spaced apart from each other, the first spherical pad and the second spherical pad are provided with a hoop on their outer sleeves, and the first spherical pad, the second spherical pad and the hoop are also located in the first mounting hole.

[0006] There is a distance between the bottom surface of the first mounting hole and the head segment. The front end surface of the first spherical pad abuts against the bottom surface of the first mounting hole. The rear end surface of the first spherical pad is located in front of the axial maximum section of the head segment. The axial maximum section is perpendicular to the axis of the roller cylinder rod. The diameter of the axial maximum section is equal to the diameter of the sphere where the head segment is located.

[0007] A groove is provided in the rear end surface of the first spherical pad, the groove is matched and connected with the head section, and the first spherical pad and the hoop are transitionally fitted or interference fitted.

[0008] The second spherical pad is a circular ring structure, and the front end surface of the second spherical pad is located in front of the largest axial section of the head section.

[0009] The inner circumference of the second spherical pad is matched and connected with the head section, and the second spherical pad is transitionally fitted or interference fitted with the ferrule.

[0010] The material of the ferrule is steel, and the wall thickness of the ferrule is 45mm-55mm. There is a gap of 0.5mm to 2.5mm between the outer circumference of the ferrule and the inner circumference of the first mounting hole. The rod section is outer-circumscribed with an end cover, which is connected and fixed to the guide block. The end cover abuts against the second spherical pad, the front end face of the ferrule abuts against the bottom surface of the first mounting hole, and the rear end face of the ferrule abuts against the end cover. The end cover can prevent the ferrule, the first spherical pad and the second spherical pad from detaching from the first mounting hole.

[0011] A pressure strip and a second slide are fixedly connected to the roller frame, and the pressure strip and the second slide both extend in the front-back direction. A fourth slide is provided on both sides of the pressure strip, the second slide is in a horizontal state, and the fourth slide is in an upright state. A guide groove is provided in the guide block, and the pressure strip and the fourth slide are both located in the guide groove. The guide block can move forward and backward along the second slide and the fourth slide.

[0012] A second mounting hole is provided in the middle of the guide block, and a locking plate is provided in the second mounting hole. The second mounting hole and the locking plate both extend in the left and right directions. A locking hydraulic cylinder and a baffle cover are provided on the left side of the guide block. The baffle cover and the locking hydraulic cylinder are provided on the left and right. The locking hydraulic cylinder and the baffle cover are both connected and fixed to the guide block through a bracket. The locking hydraulic cylinder can drive the locking plate to move left and right.

[0013] A protrusion is provided on the right side of the front end of the guide block, and the right end of the locking plate is located outside the second mounting hole. The rear side surface of the protrusion and the front side surface of the right end of the locking plate are fixedly connected with the first slide, and the first slide is in an upright state. A third slide is provided between the second mounting hole and the locking plate, and the third slide is fixedly connected to the locking plate.

[0014] A rolling mill comprises a working roll device, a rolling mill housing and a working roll bending device. The working roll bending device is the above-mentioned working roll shifting device, and the shifting frame is fixedly connected to the rolling mill housing.

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

[0016] 1. The cylinder rod of the roller hydraulic cylinder adopts a ball head structure, the outside of which is covered by the first spherical pad and the second spherical pad and then locked with a steel hoop. Finally, the first spherical pad, the second spherical pad and the steel hoop are installed in the guide block. This assembly structure can greatly improve the anti-eccentric load capability and increase the service life.

[0017] 2. The working roll shifting device is light in weight, has high rigidity, a simple and reliable structure, and is easy to maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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.

[0019] Figure 1 It is a schematic diagram of the main view of the rolling mill of the present invention.

[0020] Figure 2 It is a top view schematic diagram of the rolling mill described in the present invention.

[0021] Figure 3 yes Figure 1 Schematic cross-sectional view of the working roll shifting device along the AA direction on the left side of the middle.

[0022] Figure 4 yes Figure 3 Enlarged schematic diagram of part C in the middle.

[0023] Figure 5 The hoop, the second spherical pad and the roller cylinder rod are Figure 3 Schematic cross-sectional view in the BB direction.

[0024] Figure 6 It is a three-dimensional schematic diagram of the working roll shifting device described in the present invention.

[0025] Figure 7 It is a three-dimensional schematic diagram of the guide block.

[0026] Description of reference numerals:

[0027] 1. Work roll shifting device; 2. Work roll device; 3. Rolling mill arch;

[0028] 11. Roller shifting frame; 12. Guide block; 13. First slide; 14. Locking plate; 15. First spherical pad; 16. Second spherical pad; 17. End cover; 18. Second slide; 19. Roller shifting hydraulic cylinder; 110. Bracket; 111. Stop cover; 112. Locking hydraulic cylinder; 113. Third slide; 114. Pressing strip; 115. Fourth slide; 116. Hoop;

[0029] 21. Working roll; 22. Bearing seat;

[0030] 1201, first mounting hole; 1202, second mounting hole; 1203, guide groove; 1204, protrusion;

[0031] 1501, groove;

[0032] 1901. Shifting roll cylinder rod; 1902. Head section; 1903. Rod section; 1904. Axial maximum cross-section

[0033] 11201. Locking cylinder rod Detailed implementation manners

[0034] It should be noted that, without conflict, the embodiments and features in the embodiments of this application may be combined with each other. The following will describe the present utility model in detail with reference to the drawings and in conjunction with the embodiments.

[0035] For the convenience of understanding and description, an absolute positional relationship is adopted in the following description of the present utility model. Without special instructions, the orientation word "upper" herein represents Figure 1 the upper side direction in Figure 1 the orientation word "lower" represents Figure 1 the lower side direction in Figure 1 the orientation word "left" represents Figure 1 the left side direction in Figure 1 the orientation word "right" represents

[0036] As Figures 1 to 6 shown, a working roll shifting roll device described in an embodiment of the present utility model includes a shifting roll frame 11, a guiding block 12 and a shifting roll hydraulic cylinder 19. The guiding block 12 and the shifting roll hydraulic cylinder 19 are arranged front and rear on the shifting roll frame 11. The shifting roll hydraulic cylinder 19 can drive the guiding block 12 to move back and forth. A first mounting hole 1201 is provided inside the rear end of the guiding block 12. The shifting roll hydraulic cylinder 19 includes a shifting roll cylinder rod 1901. The shifting roll cylinder rod 1901 includes a head section 1902 and a rod section 1903 which are connected front and rear. The head section 1902 is a spherical segment structure. The diameter of the head section 1902 is larger than that of the rod section 1903. The head section 1902 is entirely located inside the first mounting hole 1201. A first spherical pad 15 and a second spherical pad 16 are sleeved outside the spherical crown surface of the head section 1902. The first spherical pad 15 and the second spherical pad 16 are arranged parallel and spaced apart front and rear. A hoop 116 is sleeved outside the first spherical pad 15 and the second spherical pad 16. The first spherical pad 15, the second spherical pad 16 and the hoop 116 are also all located inside the first mounting hole 1201.

[0037] The front end head section 1902 of the cylinder rod of the shifting roller hydraulic cylinder 19 in the working roller shifting device adopts a spherical structure, and is covered in the guide block 12 with a first spherical pad 15 and a second spherical pad 16. The first spherical pad 15 and the second spherical pad 16 are matched and connected with the head section 1902. The first spherical pad 15 and the second spherical pad 16 are provided with a sleeve 116 on the outer sleeve. The sleeve 116 can not only make the first spherical pad 15 and the second spherical pad 16 stable in the first mounting hole 1201, but also ensure the anti-eccentric load capability of the shifting roller cylinder rod 1901, thereby greatly improving the service life of the shifting roller hydraulic cylinder.

[0038] Specifically, the collar 116 can wrap the first spherical pad 15 and the second spherical pad 16 into a single unit, alleviating precision issues caused by uneven wear of the first and second spherical pads 15, 16. The collar 116 is manufactured and assembled with high precision. When the roller shifting hydraulic cylinder 19 is subjected to lateral forces, the external collar 116 can distribute some of the lateral forces, thereby improving the roller shifting cylinder rod 1901's ability to resist off-center loads.

[0039] The first mounting hole 1201 is a blind hole. There is a distance between the bottom surface of the first mounting hole 1201 and the head section 1902. The front end surface of the first spherical pad 15 abuts against the bottom surface of the first mounting hole 1201. The rear end surface of the first spherical pad 15 is located in front of the axial maximum section 1904 of the head section 1902. The axial maximum section 1904 is perpendicular to the axis of the roller cylinder rod 1901. The diameter of the axial maximum section 1904 is equal to the diameter of the sphere where the head section 1902 is located.

[0040] like Figure 3 As shown, the rear end surface of the first spherical pad 15 is provided with a groove 1501, which mates with the head section 1902, providing a transition fit or interference fit between the first spherical pad 15 and the ferrule 116. The second spherical pad 16 is an annular structure, with its front end located forward of the maximum axial cross-section 1904 of the head section 1902. The entire second spherical pad 16 is located within the first mounting hole 1201.

[0041] The inner circumference of the second spherical pad 16 is mated and connected to the head section 1902. The second spherical pad 16 and the ferrule 116 have a transition fit or interference fit. The ferrule 116, the first spherical pad 15, and the second spherical pad 16 can all be made of steel. The wall thickness of the ferrule 116 can be 45 mm to 55 mm.

[0042] In order to further improve the anti-eccentric load capability of the roller cylinder rod 1901, there is a gap of 0.5mm to 2.5mm (such as 1mm) between the outer circumference of the sleeve 116 and the inner circumference of the first mounting hole 1201. The rod section 1903 is provided with an end cover 17, and the end cover 17 is fixed to the guide block 12 by bolts. The end cover 17 abuts against the second spherical pad 16, and the front end surface of the sleeve 116 abuts against the bottom surface of the first mounting hole 1201, and the rear end surface of the sleeve 116 abuts against the end cover 17. The end cover 17 can prevent the head section 1902, the sleeve 116, the first spherical pad 15 and the second spherical pad 16 from detaching from the first mounting hole 1201. A sealing ring can be provided between the end cover 17 and the roller cylinder rod 1901.

[0043] like Figure 3 As shown, a pressure strip 114 and a second slide 18 are fixedly connected to the roller frame 11, and the pressure strip 114 and the second slide 18 both extend in the front-back direction. A fourth slide 115 is provided on both sides of the pressure strip 114, the second slide 18 is in a horizontal state, and the fourth slide 115 is in an upright state. A guide groove 1203 is provided in the guide block 12, and the pressure strip 114 and the fourth slide 115 are both located in the guide groove 1203.

[0044] The second slide 18 is fixed to the roller shifting frame 11 by bolts, the pressure strip 114 is fixed to the roller shifting frame 11 by bolts, and the fourth slide 115 is fixed to the pressure strip 114 by bolts. The guide block 12 can move back and forth along the second slide 18 and the fourth slide 115, and the guide block 12 is slidably connected to the second slide 18 and the fourth slide 115.

[0045] A second mounting hole 1202 is provided in the middle of the guide block 12. The second mounting hole 1202 is a through hole. A locking plate 14 is provided in the second mounting hole 1202. The second mounting hole 1202 and the locking plate 14 both extend in the left and right directions. A locking hydraulic cylinder 112 and a blocking cover 111 are provided on the left side of the guide block 12. The blocking cover 111 and the locking hydraulic cylinder 112 are arranged on the left and right. The locking hydraulic cylinder 112 and the blocking cover 111 are both connected and fixed to the guide block 12 through the bracket 110.

[0046] like Figure 7 As shown, the cylinder barrel and the baffle 111 of the locking hydraulic cylinder 112 are connected to the bracket 110 by bolts. The locking hydraulic cylinder 112 can drive the locking plate 14 to move left and right. The axis of the locking cylinder rod 11201 of the locking hydraulic cylinder 112 extends along the left and right directions. The locking cylinder rod 11201 can move left and right. The locking cylinder rod 11201 of the locking hydraulic cylinder 112 is fixed to the locking plate 14 by screws.

[0047] A protrusion 1204 is provided on the right side of the front end of the guide block 12, and the right end of the locking plate 14 is located outside the second mounting hole 1202. The rear side surface of the protrusion 1204 and the front side surface of the right end of the locking plate 14 are fixedly stacked and connected with the first slide plate 13. The first slide plate 13 is in an upright state. A third slide plate 113 is provided between the second mounting hole 1202 and the locking plate 14, and the third slide plate 113 is connected and fixed to the locking plate 14.

[0048] The right end of the locking plate 14 and the protrusion 1204 can lock the work roll assembly 2. The first slide 13 is bolted to the protrusion 1204, the first slide 13 is bolted to the locking plate 14, and the third slide 113 is bolted to the locking plate 14. The roller shifting hydraulic cylinder 19 can drive the guide block 12, locking plate 14, locking hydraulic cylinder 112, cover 111, and bracket 110 to move forward and backward synchronously.

[0049] The following introduces a rolling mill, which includes a working roll device 2, a rolling mill arch 3 and a working roll bending device. The working roll bending device is the above-mentioned working roll shifting device 1, and the working roll device 2 contains a working roll 21 and a bearing seat 22; the shifting frame 11 is connected and fixed to the rolling mill arch 3, and the working roll shifting device 1 can lock the bearing seat 22 of the working roll device 2.

[0050] Two pairs of work roll shifting devices 1 are arranged symmetrically. Each pair includes a work roll shifting device 1 spaced apart from one another. Thus, a rolling mill comprises four work roll shifting devices 1. The shifting frames 11 are bolted to the mill housing 3. The locking plates 14 and protrusions 1204 lock the bearing seats 22 of the work roll devices 2.

[0051] The working process of the rolling mill and the work roll shifting device 1 is described below.

[0052] When the roll is shifted according to the working conditions, the locking cylinder rod 11201 of the locking hydraulic cylinder 112 extends toward the bearing seat 22, and locks the bearing seat 22 after reaching the designated position. At this time, the roll shifting cylinder rod 1901 of the roll shifting hydraulic cylinder 19 extends or retracts (i.e., moves forward and backward), driving the working roll device 2 to move toward the transmission side or the operating side, thereby realizing the work roll shifting operation. Figures 1 to 7 shown.

[0053] 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 shifting device, characterized in that: The working roll shifting device comprises a roll shifting frame (11), a guide block (12) and a roll shifting hydraulic cylinder (19). The guide block (12) and the roll shifting hydraulic cylinder (19) are arranged front and back on the roll shifting frame (11). The roll shifting hydraulic cylinder (19) can drive the guide block (12) to move back and forth. A first mounting hole (1201) is arranged in the rear end of the guide block (12). The roll shifting hydraulic cylinder (19) comprises a roll shifting cylinder rod (1901). The roll shifting cylinder rod (1901) comprises a head section (1902) and a rod section (1903) connected front and back. The head section (1902) is a spherical segment. The invention relates to a structure in which the diameter of the head section (1902) is larger than the diameter of the rod section (1903), the head section (1902) is located in the first mounting hole (1201), the spherical crown surface of the head section (1902) is provided with a first spherical pad (15) and a second spherical pad (16), the first spherical pad (15) and the second spherical pad (16) are arranged in a front-to-back interval, the first spherical pad (15) and the second spherical pad (16) are provided with a hoop (116) on their outer covers, and the first spherical pad (15), the second spherical pad (16) and the hoop (116) are also located in the first mounting hole (1201).

2. The work roll shifting device according to claim 1, characterized in that: There is a distance between the bottom surface of the first mounting hole (1201) and the head section (1902), the front end surface of the first spherical pad (15) abuts against the bottom surface of the first mounting hole (1201), and the rear end surface of the first spherical pad (15) is located in front of the axial maximum section (1904) of the head section (1902), the axial maximum section (1904) is perpendicular to the axis of the roller cylinder rod (1901), and the diameter of the axial maximum section (1904) is equal to the diameter of the sphere where the head section (1902) is located.

3. The work roll shifting device according to claim 2, characterized in that: A groove (1501) is provided in the rear end surface of the first spherical pad (15), the groove (1501) is matched and connected with the head section (1902), and the first spherical pad (15) and the hoop (116) are transitionally fitted or interference fitted.

4. The work roll shifting device according to claim 2, characterized in that: The second spherical pad (16) is a circular ring structure, and the front end surface of the second spherical pad (16) is located in front of the axial maximum section (1904) of the head section (1902).

5. The work roll shifting device according to claim 4, characterized in that: The inner circumference of the second spherical pad (16) is matched and connected with the head section (1902), and the second spherical pad (16) and the ferrule (116) are transitionally fitted or interference fitted.

6. The work roll shifting device according to claim 1, characterized in that: The material of the hoop (116) is steel, the wall thickness of the hoop (116) is 45mm-55mm, and there is a gap of 0.5mm-2.5mm between the outer circumference of the hoop (116) and the inner circumference of the first mounting hole (1201). The rod section (1903) is provided with an end cover (17) on the outer sleeve, the end cover (17) is connected and fixed to the guide block (12), the end cover (17) is in contact with the second spherical pad (16), the front end surface of the hoop (116) is in contact with the bottom surface of the first mounting hole (1201), and the rear end surface of the hoop (116) is in contact with the end cover (17). The end cover (17) can prevent the hoop (116), the first spherical pad (15) and the second spherical pad (16) from escaping from the first mounting hole (1201).

7. The work roll shifting device according to claim 1, characterized in that: A pressure strip (114) and a second slide (18) are fixedly connected to the shifting roller frame (11), and the pressure strip (114) and the second slide (18) extend in the front-back direction. A fourth slide (115) is provided on both the left and right sides of the pressure strip (114), the second slide (18) is in a horizontal state, and the fourth slide (115) is in an upright state. A guide groove (1203) is provided in the guide block (12), and the pressure strip (114) and the fourth slide (115) are both located in the guide groove (1203). The guide block (12) can move forward and backward along the second slide (18) and the fourth slide (115).

8. The work roll shifting device according to claim 1, characterized in that: A second mounting hole (1202) is provided in the middle of the guide block (12), a locking plate (14) is sleeved in the second mounting hole (1202), the second mounting hole (1202) and the locking plate (14) both extend in the left-right direction, a locking hydraulic cylinder (112) and a blocking cover (111) are provided on the left side of the guide block (12), the blocking cover (111) and the locking hydraulic cylinder (112) are arranged left and right, the locking hydraulic cylinder (112) and the blocking cover (111) are both connected and fixed to the guide block (12) through a bracket (110), and the locking hydraulic cylinder (112) can drive the locking plate (14) to move left and right.

9. The work roll shifting device according to claim 8, characterized in that: A protrusion (1204) is provided on the right side of the front end of the guide block (12), the right end of the locking plate (14) is located outside the second mounting hole (1202), the rear side surface of the protrusion (1204) and the front side surface of the right end of the locking plate (14) are fixedly connected with a first slide plate (13), the first slide plate (13) is in an upright state, a third slide plate (113) is provided between the second mounting hole (1202) and the locking plate (14), and the third slide plate (113) is fixedly connected to the locking plate (14).

10. A rolling mill, characterized in that: The rolling mill includes a working roll device (2), a rolling mill arch (3) and a working roll bending device, wherein the working roll bending device is the working roll shifting device (1) according to claim 1, and the shifting frame (11) is connected and fixed to the rolling mill arch (3).

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