A guide and guard adjustment device for a universal section steel rolling mill and its adjustment method

Abstract

The present invention relates to a guide and guard adjustment device for a universal section steel rolling mill and an adjustment method thereof, belonging to the technical field of adjusting the section steel rolling process in the metallurgical industry. The technical solution is as follows: The eccentric pin (6) is an integral structure composed of an eccentric pin small shaft (18), an eccentric pin eccentric shaft (19), and an eccentric pin large shaft (20). The guide and guard plate (3) is provided with a guide and guard plate elliptical hole (25) and a guide and guard plate circular hole (26) that are matched with the eccentric pin eccentric shaft (19). The guide and guard plate circular hole dial (14) and the guide and guard plate elliptical hole dial (15) are respectively installed on the outer sides of two guide and guard box large shaft sleeves (23). The beneficial effect of the present invention is that according to the structural characteristics of the universal roll system, the reduction amount of each pass during the rolling process, and the actual length of the guide and guard plate, a set of formulas for calculating the guide and guard assembly parameters is designed, and in cooperation with the dial for adjusting the guide and guard eccentric pin, rapid and accurate adjustment of the universal guide and guard is achieved, and the adjustment accuracy of the guide and guard system is improved.

Description

Technical Field

[0001] The present invention relates to a guide and guard adjusting device for a universal section steel rolling mill and an adjusting method thereof, belonging to the technical field of adjusting the section steel rolling process in the metallurgical industry. Background Art

[0002] The universal rolling mill is the core equipment of the section steel production line. In current advanced rail production lines, the universal rolling mill is used to roll high-quality section steel products. The universal roll system in the universal rolling mill system must be replaced as a whole when changing the specifications or when the rolling volume of the rolls reaches the requirement. Among them, the guide and guard system in the universal roll system plays a role of supporting and guiding the section steel and the rail during the rolling of the section steel and the rail. Therefore, whether the adjustment position of the guide and guard is accurate and reasonable will directly affect the state of the section steel and the rail entering the pass system of the universal rolling mill. If the bite-in is incorrect, it will cause minor damage to the rolls, affecting the surface quality and dimensional accuracy of the section steel and the rail, and in severe cases, it will lead to serious steel piling accidents.

[0003] The guide and guard system of the universal roll system mainly includes guide and guard plates, guide and guard boxes, guide and guard crossbeams, etc. Generally, it is assembled offline according to the reduction amount of this pass, and then rolled online; during offline assembly, the guide and guard box is fixed on the guide and guard crossbeam through bolts, and a guide and guard box gasket needs to be installed between the guide and guard box and the guide and guard crossbeam to adjust the horizontal position of the guide and guard plate. A guide and guard crossbeam gasket needs to be installed below the universal guide and guard crossbeam to adjust the overall height of the guide and guard plate. Transmission side roll boxes and operating side roll boxes are respectively installed at both ends of the roll shaft of the universal rolling mill roll, and the guide and guard crossbeam is installed in the card slot of the universal roll box beam arm. The adjustment of the universal guide and guard is mainly carried out by adjusting the thickness of the universal guide and guard crossbeam gasket and the thickness of the universal guide and guard box gasket; after online rolling, according to the wear condition of the guide and guard and the change of the reduction amount, the guide and guard system is finely adjusted again.

[0004] During the rolling process of the section steel and the rail, since the guide and guard plate is always in contact with them, the scratching of the surface of the section steel and the rail by the guide and guard plate has also long troubled the production line. During the assembly process of the universal roll system, the determination of the guide and guard assembly parameters has always relied on the experience of the assemblers. Generally, the universal rolling mill is a multi-stand continuous rolling mill. After the guide and guard system is put online, it is necessary to keep one-to-one correspondence between each stand. Due to the inconsistent equipment accuracy between each rolling mill and the continuous wear of the guide and guard plate during use, it often leads to deviations in the guide and guard system after assembly and adjustment are completed and put online. At this time, the steel rolling adjuster needs to perform online adjustment again. At this time, the adjustment amount of the guide and guard plate can only be observed by the naked eye, and its accuracy is greatly reduced. When quality problems occur in the section steel and the rail products, it is impossible to achieve the adjustment effect at one time, and only the guide and guard of the universal rolling mill can be continuously adjusted, seriously affecting the product quality and production efficiency of the section steel and the rail. Summary of the Invention

[0005] The object of the present invention is to provide a guide and guard adjustment device for a universal section steel rolling mill and an adjustment method thereof, which can realize the rapid and accurate adjustment of the universal guide and guard, improve the adjustment accuracy of the guide and guard, and solve the problems existing in the background technology.

[0006] The technical solution of the present invention is as follows:

[0007] A guide and guard adjustment device for a universal section steel rolling mill includes a guide and guard plate, a guide and guard box, an eccentric pin, a circular hole scale plate of the guide and guard plate, an elliptical hole scale plate of the guide and guard plate, and an eccentric pin fine adjustment pointer. The eccentric pin is an integral structure composed of an eccentric pin small shaft, an eccentric pin eccentric shaft, and an eccentric pin large shaft. The eccentric pin small shaft and the eccentric pin large shaft are coaxial. The guide and guard plate is provided with an elliptical hole of the guide and guard plate and a circular hole of the guide and guard plate that are matched with the eccentric pin eccentric shaft. The circular hole of the guide and guard plate is close to the rolling mill side, and the elliptical hole of the guide and guard plate is far from the rolling mill side. One side of the guide and guard box is provided with two small shaft sleeves of the guide and guard box that are matched with the eccentric pin small shaft, and the other side of the guide and guard box is provided with two large shaft sleeves of the guide and guard box that are matched with the eccentric pin large shaft. The guide and guard plate is combined with the guide and guard box through two eccentric pins. The circular hole scale plate of the guide and guard plate and the elliptical hole scale plate of the guide and guard plate are respectively installed on the outer sides of the two large shaft sleeves of the guide and guard box, and the eccentric pin fine adjustment pointers are respectively fixed on the eccentric pin large shafts of the two eccentric pins.

[0008] The circular hole scale plate of the guide and guard plate is provided with two sets of data. One set of data is the adjustment amount of the guide and guard plate in the horizontal direction, and the other set of data is the adjustment amount of the guide and guard plate in the height direction. The elliptical hole scale plate of the guide and guard plate is provided with one set of data, which is the adjustment amount of the guide and guard plate in the height direction.

[0009] The circular hole scale plate of the guide and guard plate is provided with two sets of data including the outer ring data of the scale plate and the inner ring data of the scale plate. The outer ring data of the scale plate is the adjustment amount of the guide and guard plate in the height direction, and the inner ring data of the scale plate is the adjustment amount of the guide and guard plate in the horizontal direction.

[0010] A guide and guard adjustment method for a universal section steel rolling mill is operated according to the following steps:

[0011] (1) Calculate the height distance x from the upper surface of the guide and guard plate to the highest point of the rolling mill roll according to the rolling mill pass reduction amount △H, where x = (△H / 2) + H, and H is the set clearance value between the guide and guard plate and the surface of the rolled piece;

[0012] (2) Measure the horizontal distance L between the front tip of the guide and guard plate and the center lines of the elliptical hole and the circular hole of the guide and guard plate, and calculate the thickness of the guide and guard box and the guide and guard crossbeam gasket through the following formula:

[0013] ① The vertical height h from the upper surface of the guide and guard plate to the center line of the rolling mill roll is h = r - x, where r is the actual radius of the rolling mill roll;

[0014] ② The horizontal distance from the front tip of the guide and guard plate to the center line of the rolling mill roll ;

[0015] ③ The height from the center line of the guard beam to the support point of the guard beam is a, and a = h + A - d - c, where A is the vertical fixed distance between the center line of the roll and the support point of the guard beam, d is the vertical fixed distance between the upper surface of the guard plate and the center line of the eccentric hole of the guard plate, and c is the vertical distance between the center line of the eccentric hole of the guard plate and the center line of the guard beam when the fine-tuning pointer of the eccentric pin is in the horizontal position;

[0016] ④ The thickness y of the shim of the guard beam is y = a - e, where e is the height of the guard beam;

[0017] ⑤ The thickness t of the shim of the guard box is t = L + b - B, where B is the horizontal fixed distance between the center line of the roll and the center line of the guard beam;

[0018] (3) Adjust the fine-tuning pointer of the eccentric pin to the horizontal position;

[0019] (4) According to the calculated value t of the shim of the guard box, install the shim of the guard box between the guard beam and the guard box, and assemble the guard beam and the guard box together to realize the adjustment of the guard plate in the horizontal direction;

[0020] (5) According to the calculated value y of the shim of the guard beam, install the shim of the guard beam under the guard beam to realize the adjustment of the guard plate in the vertical direction;

[0021] (6) When the reduction per pass of the rolling mill needs to be adjusted during the rolling process, according to the adjustment amount requirement, first adjust the eccentric pin close to the roll side to make the fine-tuning pointer of the eccentric pin on this side point to the horizontal and height values that need to be adjusted on the circular hole dial of the guard plate, and then fix the eccentric pin close to the roll side; then adjust the eccentric pin far from the roll side to make the height value indicated by the fine-tuning pointer of the eccentric pin on this side on the elliptical hole dial of the guard plate consistent with the height value on the circular hole dial of the guard plate.

[0022] The beneficial effects of the present invention are as follows: According to the structural characteristics of the universal roll system, the reduction per pass during the rolling process, and the actual length of the guard plate, a set of formulas for calculating the assembly parameters of the guard are designed, and in cooperation with the dial for adjusting the eccentric pin of the guard, the quick and accurate adjustment of the universal guard is realized, the adjustment accuracy of the guard system is improved, and further the product quality of section steel and rail and the production efficiency of the rolling line are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is the assembly drawing of the guard;

[0024] Figure 2 is the dimension relationship drawing of the guard assembly;

[0025] Figure 3 is the assembly drawing of the dial;

[0026] Figure 4 Schematic diagram of a circular hole dial

[0027] Figure 5 Schematic diagram of an elliptical hole dial

[0028] Figure 6 Front view of the guard eccentric pin

[0029] Figure 7 Side view of the guard eccentric pin

[0030] Figure 8 Front view of the guard box

[0031] Figure 9 Top view of the guard box

[0032] Figure 10 Structure diagram of the guard plate

[0033] Figure 11 Locus diagram of the rotation axis of the eccentric pin

[0034] In the figure: roll 1, front tip of the guard plate 2, guard plate 3, upper surface of the guard plate 4, guard box 5, eccentric pin 6, gasket of the guard box 7, guard cross beam 8, gasket of the guard cross beam 9, support point of the guard cross beam 10, universal roll box girder arm 11, universal roll box 12, universal roll box card slot 13, circular hole dial of the guard plate 14, elliptical hole dial of the guard plate 15, data of the outer circle of the dial 16, data of the inner circle of the dial 17, small shaft of the eccentric pin 18, eccentric shaft of the eccentric pin 19, large shaft of the eccentric pin 20, fixed axis of the eccentric pin 21, rotation axis of the eccentric pin 22, small shaft sleeve of the guard box 23, large shaft sleeve of the guard box 24, elliptical hole of the guard plate 25, circular hole of the guard plate 26, fine adjustment pointer of the eccentric pin 27. Specific implementation mode

[0035] The present invention will be further described below with reference to the accompanying drawings and by way of examples.

[0036] Refer to the appendix Figures 1-11, A guide and guard adjustment device for a universal section steel rolling mill, comprising a guide and guard plate 3, a guide and guard box 5, an eccentric pin 6, a circular hole scale dial 14 for the guide and guard plate, an elliptical hole scale dial 15 for the guide and guard plate, and an eccentric pin fine adjustment pointer 27. The eccentric pin 6 is an integral structure composed of an eccentric pin small shaft 18, an eccentric pin eccentric shaft 19, and an eccentric pin large shaft 20. The eccentric pin small shaft 18 and the eccentric pin large shaft 20 are coaxial. The guide and guard plate 3 is provided with a guide and guard plate elliptical hole 25 and a guide and guard plate circular hole 26 that cooperate with the eccentric pin eccentric shaft 19. The guide and guard plate circular hole 26 is close to the side of the rolling mill roll, and the guide and guard plate elliptical hole 25 is far from the side of the rolling mill roll. One side of the guide and guard box 5 is provided with two guide and guard box small shaft sleeves 23 that cooperate with the eccentric pin small shaft 18, and the other side of the guide and guard box 5 is provided with two guide and guard box large shaft sleeves 23 that cooperate with the eccentric pin large shaft 20. The guide and guard plate 3 is combined with the guide and guard box 5 through two eccentric pins 6. The circular hole scale dial 14 for the guide and guard plate and the elliptical hole scale dial 15 for the guide and guard plate are respectively installed on the outer sides of the two guide and guard box large shaft sleeves 23, and the eccentric pin fine adjustment pointer 27 is respectively fixed on the eccentric pin large shafts 20 of the two eccentric pins 6.

[0037] In this embodiment, as shown in the appendix Figures 1-11 , the circular hole scale dial 14 for the guide and guard plate and the elliptical hole scale dial 15 for the guide and guard plate are respectively installed on the outer sides of the front and rear two guide and guard box large shaft sleeves 24 of the guide and guard box 5. 16 scale lines are uniformly machined on the circular hole scale dial 14 for the guide and guard plate and the elliptical hole scale dial 15 for the guide and guard plate. Among them, the eccentric pin close to the rolling mill roll 1 has the function of adjusting both the height and the horizontal position of the guide and guard plate 3. Therefore, two sets of data are machined on the circular hole scale dial 14 for the guide and guard plate. The outer circle data 16 of the scale dial is the vertical height adjustment amount of the guide and guard plate 3, and the inner circle data 17 of the scale dial is the horizontal distance adjustment amount of the guide and guard plate 3. The eccentric pin far from the rolling mill roll 1 only has the function of adjusting the height of the guide and guard plate 3. Therefore, only one set of data indicating the height adjustment amount of the guide and guard plate 3 is machined on the elliptical hole scale dial 15 for the guide and guard plate.

[0038] The adjustment amount is calculated according to the structure of the eccentric pin 6. The eccentric pin large shaft 20 is installed in the guide and guard box large shaft sleeve 24, the eccentric pin small shaft 18 is installed in the guide and guard box small shaft sleeve 23, and the eccentric pin eccentric shaft 19 is respectively installed in the guide and guard plate elliptical hole 25 and the guide and guard plate circular hole 26. When the eccentric pin 6 is rotated, the eccentric pin rotation axis 22 makes a circular motion around the eccentric pin fixed axis 21. The eccentric pin eccentric shaft 19 on the side close to the rolling mill roll 1 drives the guide and guard plate circular hole 26 to move in the horizontal direction and the height direction, and the eccentric pin eccentric shaft 19 on the side far from the rolling mill roll 1 drives the guide and guard plate elliptical hole 25 to move in the height direction. When the eccentric pin fine adjustment pointer 27 points to different scale lines, the displayed value is the adjustment amount of the height and the horizontal position of the guide and guard plate 3, which is used to guide the adjuster to accurately adjust the height of the guide and guard plate 3.

[0039] A method for adjusting the guide and guard of a universal section steel rolling mill is operated according to the following steps:

[0040] (1) Calculate the height distance x from the upper surface 4 of the guard plate to the highest point of the roll 1 according to the reduction ΔH per pass of the rolling mill, where x = (ΔH / 2) + H, and H is the set clearance value between the guard plate 3 and the surface of the rolled piece;

[0041] (2) Measure the horizontal distance L between the front tip 2 of the guard plate and the center lines of the oval hole 25 and the round hole 26 of the guard plate, and calculate the thicknesses of the gaskets of the guard box 5 and the guard cross beam 8 through the following formulas:

[0042] ① The vertical height h from the upper surface 4 of the guard plate to the center line of the roll 1 is h = r - x, where r is the actual radius of the roll 1;

[0043] ② The horizontal distance from the front tip 2 of the guard plate to the center line of the roll 1 ;

[0044] ③ The height from the center line of the guard cross beam 8 to the support point 10 of the guard cross beam is a, and a = h + A - d - c, where A is the vertical fixed distance between the center line of the roll 1 and the support point 10 of the guard cross beam, d is the vertical fixed distance between the upper surface 4 of the guard plate and the center line of the eccentric hole of the guard plate 3, and c is the vertical distance between the center line of the eccentric hole of the guard plate 3 and the center line of the guard cross beam 8 when the eccentric pin fine adjustment pointer 27 is in the horizontal position;

[0045] ④ The thickness y of the gasket of the guard cross beam 9 is y = a - e, where e is the height of the guard cross beam 8;

[0046] ⑤ The thickness t of the gasket of the guard box 7 is t = L + b - B, where B is the horizontal fixed distance between the center line of the roll 1 and the center line of the guard cross beam 8;

[0047] (3) Adjust the eccentric pin fine adjustment pointer to the horizontal position;

[0048] (4) According to the calculated value t of the gasket of the guard box, install the gasket 7 of the guard box between the guard cross beam 8 and the guard box 5, and assemble the guard cross beam 8 and the guard box 5 together to realize the adjustment of the guard plate 3 in the horizontal direction;

[0049] (5) According to the calculated value y of the gasket of the guard cross beam, install the gasket 9 of the guard cross beam below the guard cross beam 8 to realize the adjustment of the guard plate 3 in the vertical direction;

[0050] (6) When the reduction per pass of the rolling mill needs to be adjusted during the rolling process, according to the adjustment amount requirement, first adjust the eccentric pin on the side close to the roll 1 to make the eccentric pin fine adjustment pointer point to the required horizontal and height values on the round hole dial 14 of the guard plate, and then fix the eccentric pin on the side close to the roll 1; then adjust the eccentric pin on the side far from the roll 1 to make the height value pointed by the eccentric pin fine adjustment pointer on the oval hole dial 15 of the guard plate consistent with the height value on the round hole dial 14 of the guard plate.

[0051] In this embodiment, first, determine the rolling mill stand pass reduction ΔH, the actual radius r of the roll 1, and the clearance value H between the upper surface 4 of the guard plate and the surface of the rolled piece. Measure the horizontal distance L from the front tip 2 of the guard plate to the center of the two eccentric hole centerlines of the guard plate 3, and confirm it before the guard assembly according to the actual situation.

[0052] The vertical fixed distance A between the centerline of the roll 1 and the support point 10 of the guard beam of the roll box, the vertical fixed distance d between the upper surface 4 of the guard plate and the center line of the eccentric hole of the guard plate 3. When the eccentric pin fine-tuning pointer 27 is in the horizontal position, the vertical distance c between the center line of the eccentric hole of the guard plate 3 and the center line of the guard beam 8, the height e of the guard beam 9, and the horizontal fixed distance between the center line of the roll 1 and the center line of the guard beam 8. The above values are fixed values determined by the roll box structure and the guard structure.

[0053] Assume that the rolling mill stand pass reduction ΔH = 6 mm, the actual radius r of the roll 1 = 1200 mm, the clearance value H between the upper surface 4 of the guard plate and the surface of the rolled piece = 2 mm, the horizontal distance L from the front tip 2 of the guard plate to the center of the two eccentric hole centerlines of the guard plate 3 = 850 mm, the vertical fixed distance A between the center line of the roll 1 and the support point 10 of the guard beam of the roll box = 215 mm, the vertical fixed distance d between the upper surface 4 of the guard plate and the center line of the eccentric hole of the guard plate 3 = 270 mm. When the eccentric pin fine-tuning pointer 27 is in the horizontal position, the vertical distance c between the center line of the eccentric hole of the guard plate 3 and the center line of the guard beam 8 = 215 mm, the height e of the guard beam 9 = 160 mm, and the horizontal fixed distance B between the center line of the roll 1 and the center line of the guard beam 8 = 875 mm.

[0054] (1) According to the pass reduction ΔH = 6 mm, calculate the height distance x from the upper surface 4 of the guard plate to the highest point of the roll 1: x = (ΔH / 2) + H = 3 + 2 = 5 mm, where H = 2 mm is the set clearance value between the guard plate and the surface of the rolled piece.

[0055] (2) The horizontal distance L from the front tip 2 of the guard plate to the center of the two eccentric pin centerlines of the guard plate 3 is 850 mm. Calculate the gasket thickness of the guard box 5 and the gasket thickness of the guard beam 8 through the following formula:

[0056] ① The vertical height h from the upper surface 4 of the guard plate to the center line of the roll 1: h = r - x = 600 - 5 = 595 mm, where r = 600 mm is the actual radius of the roll 1.

[0057] ② The horizontal distance from the front tip 2 of the guard plate to the center line of the roll 1 ;

[0058] ③ The height a from the center line of the guard beam 8 to the support point 10 of the guard beam is a, where a = h + A - d - c = 595 + 215 - 270 - 215 = 325 mm. Here, A = 215 mm is the vertical fixed distance between the center line of the roll 1 and the support point 10 of the guard beam, d = 270 mm is the vertical fixed distance between the upper surface 4 of the guard plate and the center line of the eccentric hole of the guard plate 3, and c = 215 mm is the vertical distance between the center line of the eccentric hole of the guard plate 3 and the center line of the guard beam 8 when the eccentric pin fine-tuning pointer 27 is in the horizontal position;

[0059] ④ The thickness y of the guard beam gasket 9 is y = a - e = 325 - 160 = 165 mm, where e = 160 mm is the height of the guard beam 9;

[0060] ⑤ The thickness t of the guard box gasket 7 is t = L + b - B = 850 + 77 - 875 = 52 mm, where B = 875 mm is the horizontal fixed distance between the center line of the roll 1 and the center line of the guard beam 8;

[0061] (3) Adjust the eccentric pin fine-tuning pointer 27 to the horizontal position;

[0062] (4) According to the calculated value of the guard box gasket t = 52 mm, install the guard box gasket 7 between the guard beam 8 and the guard box 5, and assemble the guard beam 8 and the guard box 5 together to achieve the adjustment of the guard plate 3 in the horizontal direction;

[0063] (5) According to the calculated value of the guard beam gasket y = 165 mm, install the guard beam gasket 9 under the guard beam 8, and install the guard beam 8 into the universal roll box slot 13 of the universal roll box girder arm 11 to achieve the adjustment of the guard plate 3 in the vertical direction;

[0064] (6) During the rolling process, when the reduction needs to be adjusted due to wear of the guard plate or other reasons, for example, when the reduction is adjusted from 6 mm to 8 mm, according to the above step 1, calculate the height distance x from the upper surface 4 of the guard plate to the highest point of the roll 1 as x = (△H / 2) + H = 4 + 2 = 6 mm. The height of the guard plate 3 needs to be increased by 1 mm. First, adjust the eccentric pin on the side close to the roll 1 so that the eccentric pin fine-tuning pointer on this side points to the middle of 0 - 1.9 on the outer ring data 16 of the dial, and then fix the eccentric pin on the side close to the roll 1; then adjust the eccentric pin on the side far from the roll 1 so that the eccentric pin fine-tuning pointer on this side points to the middle of 0 - 1.9 on the elliptical hole dial 15 of the guard plate, making the front and rear heights of the guard plate 3 consistent. At this time, the guard plate 3 is horizontal, meeting the needs of the rolling process.

Claims

1. A method for adjusting the guide and guard of a universal section steel rolling mill, characterized in that: The guide and guard adjusting device used for the universal section steel rolling mill includes a guide and guard plate (3), a guide and guard box (5), an eccentric pin (6), a circular hole scale disk (14) of the guide and guard plate, an elliptical hole scale disk (15) of the guide and guard plate, and an eccentric pin fine adjustment pointer (27). The eccentric pin (6) is an integral structure composed of an eccentric pin small shaft (18), an eccentric pin eccentric shaft (19), and an eccentric pin large shaft (20). The eccentric pin small shaft (18) and the eccentric pin large shaft (20) are coaxial; on the guide and guard plate (3), there are provided a guide and guard plate elliptical hole (25) and a guide and guard plate circular hole (26) that cooperate with the eccentric pin eccentric shaft (19). The guide and guard plate circular hole (26) is close to the side of the rolling roll, and the guide and guard plate elliptical hole (25) is far from the side of the rolling roll; on one side of the guide and guard box (5), there are provided two guide and guard box small shaft sleeves (23) that cooperate with the eccentric pin small shaft (18), and on the other side of the guide and guard box (5), there are provided two guide and guard box large shaft sleeves (24) that cooperate with the eccentric pin large shaft (20); the guide and guard plate (3) is combined with the guide and guard box (5) through two eccentric pins (6). The circular hole scale disk (14) of the guide and guard plate and the elliptical hole scale disk (15) of the guide and guard plate are respectively installed on the outer sides of the two guide and guard box large shaft sleeves (24), and the eccentric pin fine adjustment pointer (27) is respectively fixed on the eccentric pin large shafts (20) of the two eccentric pins (6); The operation is carried out according to the following steps: (1) Calculate the height distance x from the upper surface (4) of the guide and guard plate to the highest point of the rolling roll (1) according to the rolling reduction △H of the rolling mill pass, where x = (△H / 2) + H, and H is the set clearance value between the guide and guard plate (3) and the surface of the rolled piece; (2) Measure the horizontal distance L between the front tip (2) of the guide and guard plate and the center lines of the guide and guard plate elliptical hole (25) and the guide and guard plate circular hole (26), and calculate the thickness of the gasket between the guide and guard box (5) and the guide and guard cross beam (8) through the following formula: ① The vertical height h from the upper surface (4) of the guide and guard plate to the center line of the rolling roll (1) is h = r - x, where r is the actual radius of the rolling roll (1); ② The horizontal distance from the front tip (2) of the guard plate to the center line of the rolling roll (1) ; ③ The height of the center line of the guide and guard cross beam (8) from the support point (10) of the guide and guard cross beam is a, and a = h + A - d - c, where A is the vertical fixed distance between the center line of the rolling roll (1) and the support point (10) of the guide and guard cross beam, d is the vertical fixed distance between the upper surface (4) of the guide and guard plate and the center line of the eccentric hole of the guide and guard plate (3), and c is the vertical distance between the center line of the eccentric hole of the guide and guard plate (3) and the center line of the guide and guard cross beam (8) when the eccentric pin fine adjustment pointer (27) is in the horizontal position; ④ The thickness y of the guide and guard cross beam gasket (9) is y = a - e, where e is the height of the guide and guard cross beam (8); ⑤ The thickness t of the guide and guard box gasket (7) is t = L + b - B, where B is the horizontal fixed distance between the center line of the rolling roll (1) and the center line of the guide and guard cross beam (8); (3) Adjust the eccentric pin fine adjustment pointer to the horizontal position; (4) According to the calculated value t of the guide and guard box gasket, install the guide and guard box gasket (7) between the guide and guard cross beam (8) and the guide and guard box (5), and assemble the guide and guard cross beam (8) and the guide and guard box (5) together to realize the adjustment of the guide and guard plate (3) in the horizontal direction; (5)According to the calculated value y of the spacer for the guard beam, install the spacer (9) for the guard beam under the guard beam (8) to achieve the adjustment of the guard plate (3) in the vertical direction; (6)When the reduction per pass of the rolling mill needs to be adjusted during the rolling process, according to the adjustment amount requirement, first adjust the eccentric pin near the roll (1) side so that the fine adjustment pointer of the eccentric pin on this side points to the required horizontal and height values on the circular hole dial (14) of the guard plate, and then fix the eccentric pin near the roll (1) side; then adjust the eccentric pin on the side far from the roll (1) side so that the fine adjustment pointer of the eccentric pin on this side points to the height value on the elliptical hole dial (15) of the guard plate, which is the same as the height value on the circular hole dial (14) of the guard plate.

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