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, and a first spherical pad (15) and a second spherical pad (16) are arranged between the spherical crown face of the head section (1902) and the inner circumferential face of the first mounting hole (1201) in a matched and sleeved mode. 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 the spherical pad is wrapped in the guide block, so that the unbalance loading resistance can be greatly improved, and the service life of the roll shifting hydraulic cylinder 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 roll shifting hydraulic cylinder in the working roll shifting device adopts a spherical structure and is covered in the guide block with a spherical pad, which can greatly improve the anti-eccentric load capability and increase the service life of the roll shifting hydraulic cylinder.

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

[0005] A working roll shifting device includes 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 provided 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. A first spherical pad and a second spherical pad are matched between the spherical crown surface of the head section and the inner circumferential surface of the first mounting hole. The first spherical pad and the second spherical pad are arranged at intervals front and back.

[0006] There is a distance between the bottom surface of the first mounting hole and the head segment. The first spherical pad is a circular ring structure. The front end surface of the first spherical pad abuts 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, and the diameter of the axial maximum section is equal to the diameter of the sphere where the head segment is located.

[0007] The inner diameter of the first spherical pad is 15% to 35% of the outer diameter of the first spherical pad. The middle and rear parts of the inner circumference of the first spherical pad are matched and connected with the head section. There is a gap of 0.5mm to 2.5mm between the outer circumference of the first spherical pad and the inner circumference of the first mounting hole.

[0008] The second spherical pad is a circular ring structure. The front end surface of the second spherical pad is located behind the axial maximum section of the head section. The second spherical pad is entirely located in the first mounting hole.

[0009] The front and middle parts of the inner circumference of the second spherical pad are matched and connected with the head section, and there is a gap of 0.5mm to 2.5mm between the outer circumference of the second spherical pad and the inner circumference of the first mounting hole; the rear part of the inner circumference of the second spherical pad is sleeved outside the front end of the rod section, and the inner diameter of the rear part of the inner circumference of the second spherical pad is larger than the outer diameter of the front end of the rod section.

[0010] An end cover is provided on the outer cover of the rod section, which is connected and fixed to the guide block and abuts against the second spherical pad. The end cover can prevent the first spherical pad and the second spherical pad from detaching from the first mounting hole. A sealing ring is provided between the end cover and the roller cylinder rod.

[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 are provided on the left side of the guide block. The baffle and the locking hydraulic cylinder are provided on the left and right sides. The locking hydraulic cylinder and the baffle are fixed to the guide block through a bracket. The locking hydraulic cylinder can drive the locking plate to move left and right. The locking hydraulic cylinder is a double-rod structure. The axis of the locking cylinder rod of the locking hydraulic cylinder extends in the left and right directions. The left end of the locking cylinder rod of the locking hydraulic cylinder abuts against the baffle, and the right end of the locking cylinder rod of the locking hydraulic cylinder abuts against the locking plate.

[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 and is covered with a spherical pad in the moving block. This assembly structure can greatly improve the anti-eccentric load capability and extend the service life of the hydraulic cylinder.

[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 The first spherical pad and the roller cylinder rod are along Figure 3 Schematic cross-sectional view in the BB direction.

[0023] Figure 5 It is a three-dimensional schematic diagram of the working roll shifting device described in the present invention.

[0024] Figure 6 It is a three-dimensional schematic diagram of the guide block.

[0025] Figure 7 yes Figure 3 Enlarged schematic diagram of part C in the middle.

[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.

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

[0030] 1201, First mounting hole; 1202, Second mounting hole; 1203, Guide groove; 1204, Protrusion;

[0031] 1901, Shifting roll cylinder rod; 1902, Head section; 1903, Rod section; 1904, Axial maximum cross-section;

[0032] 11201, Locking cylinder rod. Specific embodiments

[0033] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can 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.

[0034] 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" represents Figure 1 the upper side direction in Figure 1 the lower side direction in Figure 1 the left side direction in Figure 1 the right side direction in Figure 1 the front represents the direction perpendicular to Figure 1 the paper surface and pointing towards the inner side of the paper surface, and the orientation word "rear" represents the direction perpendicular to

[0035] As Figures 1 to 6 shown, a working roll shifting roll device according to an embodiment of the present utility model includes a shifting roll frame 11, a guide block 12, and a shifting roll hydraulic cylinder 19. The guide 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 guide block 12 to move back and forth. A first mounting hole 1201 is provided inside the rear end of the guide 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 connected front and rear. The head section 1902 is a spherical segment structure. The diameter of the head section 1902 is greater than the diameter 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 between the spherical crown surface of the head section 1902 and the inner peripheral surface of the first mounting hole 1201 in a matching manner. The first spherical pad 15 and the second spherical pad 16 are arranged at intervals front and rear.

[0036] The front end head section 1902 of the cylinder rod of the roller shifting 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, which can greatly improve the anti-eccentric load capability of the working roller shifting device, thereby improving the service life of the roller shifting hydraulic cylinder.

[0037] The first mounting hole 1201 is a blind hole, and there is a distance between the bottom surface of the first mounting hole 1201 and the head section 1902. The first spherical pad 15 is a circular ring structure. 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.

[0038] like Figure 3 As shown, the inner diameter of the first spherical pad 15 is 15% to 35% (e.g., 25%) of the outer diameter of the first spherical pad 15 , and the middle and rear portions of the inner circumference of the first spherical pad 15 are mated and connected to the head section 1902 . To further enhance the anti-eccentric load capability of the work roll shifting device, a gap of 0.5 mm to 2.5 mm (e.g., 1 mm) is provided between the outer circumference of the first spherical pad 15 and the inner circumference of the first mounting hole 1201 .

[0039] The second spherical pad 16 is annular in structure, with its front end located behind 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. The front and middle portions of the inner circumference of the second spherical pad 16 mate with the head section 1902.

[0040] To further enhance the work roll shifting device's ability to resist off-center loads, a clearance of 0.5 mm to 2.5 mm (e.g., 1 mm) is maintained between the outer circumference of the second spherical pad 16 and the inner circumference of the first mounting hole 1201. The rear portion of the inner circumference of the second spherical pad 16 fits over the front end of the rod segment 1903. The rear inner diameter of the second spherical pad 16 is greater than the front outer diameter of the rod segment 1903. Both the first spherical pad 15 and the second spherical pad 16 can be made of steel.

[0041] The rod section 1903 is covered with an end cover 17, which is fixed to the guide block 12 by bolts. The end cover 17 abuts against the second spherical pad 16. The end cover 17 can prevent the head section 1902, 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.

[0042] like Figure 3As 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.

[0043] 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.

[0044] 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.

[0045] 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 locking hydraulic cylinder 112 is a double-rod structure. 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 left end of the locking cylinder rod 11201 of the locking hydraulic cylinder 112 abuts against the baffle 111, and the right end of the locking cylinder rod 11201 of the locking hydraulic cylinder 112 is clamped or bolted to the locking plate 14.

[0046] 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.

[0047] 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 shifting roller 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.

[0048] 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.

[0049] 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.

[0050] The working process of the rolling mill and the work roll shifting device 1 is described below.

[0051] 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, realizing the work roll shifting operation, such as Figures 1 to 7 shown.

[0052] 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), wherein 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), and the roll shifting cylinder rod (1901) comprises a head section ( 1902) and a rod section (1903), the head section (1902) is a spherical segment structure, 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), and a first spherical pad (15) and a second spherical pad (16) are matched and sleeved between the spherical crown surface of the head section (1902) and the inner circumference of the first mounting hole (1201), and the first spherical pad (15) and the second spherical pad (16) are arranged in a front-to-back interval.

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 first spherical pad (15) is a circular ring structure, the front end surface of the first spherical pad (15) is in contact with 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: The inner diameter of the first spherical pad (15) is 15% to 35% of the outer diameter of the first spherical pad (15), the middle and rear parts of the inner circumference of the first spherical pad (15) are matched and connected with the head section (1902), and there is a gap of 0.5 mm to 2.5 mm between the outer circumference of the first spherical pad (15) and the inner circumference of the first mounting hole (1201).

4. The work roll shifting device according to claim 2, characterized in that: The second spherical pad (16) is a circular ring structure. The front end surface of the second spherical pad (16) is located behind the axial maximum section (1904) of the head section (1902). The second spherical pad (16) is entirely located in the first mounting hole (1201).

5. The work roll shifting device according to claim 4, characterized in that: The front and middle parts of the inner circumference of the second spherical pad (16) are matched and connected with the head section (1902), and there is a gap of 0.5mm to 2.5mm between the outer circumference of the second spherical pad (16) and the inner circumference of the first mounting hole (1201); the rear part of the inner circumference of the second spherical pad (16) is sleeved outside the front end of the rod section (1903), and the inner diameter of the rear part of the inner circumference of the second spherical pad (16) is larger than the outer diameter of the front end of the rod section (1903).

6. The work roll shifting device according to claim 1, characterized in that: The rod section (1903) is provided with an end cover (17) on its outer sleeve. The end cover (17) is connected and fixed to the guide block (12). The end cover (17) abuts against the second spherical pad (16). The end cover (17) can prevent the first spherical pad (15) and the second spherical pad (16) from being separated from the first mounting hole (1201). A sealing ring is provided between the end cover (17) and the roller cylinder rod (1901).

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 on the left and right, and the locking hydraulic cylinder (112) and the blocking cover (111) are both connected through the bracket (110). The locking hydraulic cylinder (112) is connected and fixed with the guide block (12), and can drive the locking plate (14) to move left and right. The locking hydraulic cylinder (112) is a double-rod structure. The axis of the locking cylinder rod (11201) of the locking hydraulic cylinder (112) extends in the left and right directions. The left end of the locking cylinder rod (11201) of the locking hydraulic cylinder (112) abuts against the blocking cover (111), and the right end of the locking cylinder rod (11201) of the locking hydraulic cylinder (112) abuts against the locking plate (14).

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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