A kind of roughing backup roll broken roll position deviation rectifying device and method

Abstract

This invention discloses a device and method for correcting the position of a broken support roll in a roughing mill, comprising a first assembly module and a second assembly module; the first assembly module and the second assembly module have the same width; the length of the first assembly module is greater than the length of the second assembly module; the first assembly module and the second assembly module are used to correct the horizontal and left-right deviations of the two broken roll segments, so that the circular center lines of the two broken roll segments are on the same axis. This invention solves the significant safety hazards posed by workers entering the mill frame and the problems caused by left-right and up-down deviations due to broken rolls.

Description

Technical Field

[0001] This invention relates to hot rolling production technology, and more specifically, to a device and method for correcting the position of a broken support roll in a roughing mill. Background Technology

[0002] Currently, when handling broken rolls on the roughing mill's upper support roll 1 in the hot rolling mill production line of steel enterprises, the broken roll will cause left and right displacement (e.g., Figure 1 As shown), due to the lack of a dedicated device for correcting broken rolls, the work roll must first be pulled out, and then workers must crawl into the narrow frame to correct the broken roll's position. Finally, the broken roll is simply connected and fixed by welding many steel bars around its circumference. This operation poses a significant safety hazard to personnel, and welding many steel bars is very time-consuming, generally requiring 2 to 3 hours. If the push-pull rod is directly installed into the roll changing bracket 2, through the roughing mill frame (such as... Figure 2 The balancing cylinder (as shown) moves up and down to place the broken support roll 1 from the roughing mill onto the roll changing bracket 2. The broken roll will also experience a horizontal deviation (e.g., Figure 3 As shown, the broken roller will wobble when it is pulled out, so it is necessary to fix the broken roller.

[0003] Because of the limited space in the roughing mill stand, even a slight deviation in the position of the roughing mill support roll after roll breakage can cause jamming during roll removal, potentially damaging the roughing mill stand. Therefore, the fixation of the broken roll must be as precise as possible, and extreme care must be taken when removing the roll from the roll replacement bracket and the broken roll on it. If roll removal becomes obstructed, the process must be stopped immediately. The broken roll must be adjusted by repeatedly pulling it back and forth and by continuously moving the balance cylinder in the roughing mill stand up and down. To ensure safety during roll removal, this process is very slow, resulting in several hours being spent dealing with a broken roll accident. Summary of the Invention

[0004] In view of the above-mentioned defects in the existing technology, the purpose of this invention is to provide a device and method for correcting the position of a broken support roll in a roughing mill, thereby solving the problems of significant safety hazards for workers entering the mill frame and the left-right and up-down deviations caused by the broken roll.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] On the one hand, a device for correcting the position of a broken roughing mill support roll includes a first set of modules and a second set of modules;

[0007] The first and second set modules have the same width;

[0008] The length of the first set of modules is greater than the length of the second set of modules;

[0009] The first and second sets of modules are used to correct the two broken rollers in the horizontal and left-right directions, so that the circular center lines of the two broken rollers are on the same axis.

[0010] Preferably, the first kit module includes a first module body, and the first module body is provided with a first mounting cavity;

[0011] The first mounting cavity is provided with two horizontally parallel first lead screws and a first flat support plate;

[0012] The two first lead screws are connected by a transmission mechanism, and each of the first lead screws has two mirror-symmetrical first threads on its surface.

[0013] The first thread is provided with a first saddle nut, and the first saddle nut is provided with a first saddle;

[0014] The first flat support plate is located at the top of the first mounting cavity and on one side of the first saddle.

[0015] Preferably, both ends of the first lead screw are cylindrical to penetrate the inner wall of the first mounting cavity;

[0016] The middle position of the first lead screw is also set as a cylinder.

[0017] Preferably, the transmission mechanism includes a gear disposed on the cylindrical end of the first lead screw, and a chain for connecting the two gears and meshing with the gears.

[0018] Preferably, the bottom of the first mounting cavity is provided with three first positioning blocks along its width toward the central axis;

[0019] The two first positioning blocks correspond to the cylinders located in the middle of the two first lead screws;

[0020] One of the first positioning blocks is located between the two first lead screws.

[0021] Preferably, the top of the first saddle is set as a slope, so that a V-shape is formed between the two first saddles;

[0022] The side of the first saddle is designed in an inverted T shape;

[0023] The bottom sides of the first saddle extend outward to form sliders. One side of the slider is adapted to the groove on the inner wall of the first mounting cavity, and the other side of the slider is adapted to the groove provided in the first mounting cavity.

[0024] The bottom of the first mounting cavity is provided with three first slide rails for the first saddle to move;

[0025] The positions of the three first slide rails also correspond to the positions of the three first positioning blocks, with the first positioning blocks fixed on the first slide rails.

[0026] Preferably, the first kit module includes a second module body, and the second module body is provided with a second mounting cavity;

[0027] The second mounting cavity is provided with a second lead screw and a second flat support plate;

[0028] The surface of the second lead screw is provided with two mirror-symmetrical second threads;

[0029] The second thread is provided with a second saddle;

[0030] The second flat support plate is located at the top of the second mounting cavity and on one side of the second saddle.

[0031] Preferably, both ends of the second lead screw are cylindrical to penetrate the inner wall of the second mounting cavity;

[0032] The middle position of the second lead screw is also set as a cylinder;

[0033] The second mounting cavity is further provided with a second positioning block at the bottom and at the center of its width;

[0034] The second positioning block corresponds to the cylinder at the middle position of the second lead screw.

[0035] Preferably, the top of the second saddle is set as a slope, so that a V-shape is formed between the two second saddles;

[0036] The side of the second saddle is designed in an inverted T shape;

[0037] The bottom sides of the second saddle extend outward to form sliders. One side of the slider is adapted to the groove on the inner wall of the second mounting cavity, and the other side of the slider is adapted to the groove provided in the second mounting cavity.

[0038] The bottom of the second mounting cavity is provided with a second slide rail for the second saddle to move;

[0039] The position of the second slide rail also corresponds to the position of the second positioning block, and the second positioning block is fixed on the second slide rail.

[0040] On the other hand, a method for correcting the position of a broken roughing mill support roll involves using the aforementioned correction device to perform the following steps:

[0041] S1. Confirm the location of the broken roller. Obtain the L1 distance to be adjusted for the first saddle and the second saddle by using the diameter of the broken roller. First, adjust the L1 distance of the second saddle and check it with a measuring tape.

[0042] S2. Adjust the L1 distance of the first saddle again and check it with a measuring tape;

[0043] S3. Combine the first set module and the second set module, with the longer section of the broken roller matching the first set module and the shorter section of the broken roller matching the second set module;

[0044] S4. Push the first set module, the second set module, and the bracket into the frame. Through the up and down movement of the balance cylinder, the broken roller is adjusted into position under the action of the first saddle and the second saddle. After the balance cylinder is moved down into position, observe whether the support roller bearing box and the first flat support plate and the second flat support plate are in contact. After they are in contact, pull out the first set module, the second set module, and the bracket together with the broken roller to complete the correction and removal of the broken roller.

[0045] Preferably, the L1 distance of the first saddle is:

[0046] The distance from the inner side of the first saddle to the edge of the first positioning block.

[0047] The L1 distance of the first saddle is the distance from the inner side of the second saddle to the edge of the second positioning block.

[0048] The present invention provides a device and method for correcting the position of a broken support roll in a roughing mill, which aligns the center lines of the two broken roll sections with the same straight line. After adjustment using this method, the broken roll can be removed within 20-30 minutes, avoiding the safety hazards of personnel working inside the mill frame for extended periods. This solves the problems of safety hazards associated with personnel working inside the mill frame, as well as the long working hours and low efficiency associated with existing methods. Attached Figure Description

[0049] Figure 1 This is a schematic diagram showing the left and right deviation caused by a broken roller;

[0050] Figure 2 This is a schematic diagram of replacing broken rolls using a roughing mill stand;

[0051] Figure 3 This is a schematic diagram of the horizontal displacement caused by the broken roller;

[0052] Figure 4 This is a schematic diagram of the structure of the first module in the correction device of the present invention;

[0053] Figure 5This is a side view schematic diagram of the correction device of the present invention, wherein (a) is the first set module and (b) is the second set module;

[0054] Figure 6 This is a top view schematic diagram of the correction device of the present invention, wherein (a) is the first set of modules and (b) is the second set of modules;

[0055] Figure 7 This is a schematic diagram of adjusting the L1 distance in the correction method of the present invention;

[0056] Figure 8 This is a schematic diagram illustrating the calculation of the change in the radius of the support roller and the outward displacement distance of the saddle in the correction method of this invention;

[0057] Figure 9 This is a schematic diagram of the correction device used to correct and adjust the broken roller in the correction method of the present invention. Detailed Implementation

[0058] To better understand the above-mentioned technical solutions of the present invention, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0059] Combination Figures 4 to 6 As shown, the present invention provides a device for correcting the position of a broken roughing support roll, comprising a first assembly module 10 and a second assembly module 11.

[0060] The width of the first set of modules 10 and the second set of modules 10 is the same.

[0061] The length of the first module 10 is greater than the length of the second module 11.

[0062] The first set of modules 10 and the second set of modules 11 are used to correct the horizontal and left-right deviations of the two broken rollers 100 so that the center lines of the two broken rollers 100 are on the same axis.

[0063] The first module 10 includes a first module body 12, on which a first mounting cavity 13 is provided.

[0064] The first mounting cavity 13 is provided with two horizontally parallel first lead screws 14 and a first flat support plate 15.

[0065] The two first lead screws 14 are connected by a transmission mechanism, and each of the first lead screws 14 has two mirror-symmetrical first threads 16 on its surface.

[0066] The first thread 16 is provided with a first saddle nut 17, and the first saddle nut 17 is provided with a first saddle 18.

[0067] The first flat support plate 15 is rectangular and is located at the top of the first mounting cavity 13 and on one side of the first saddle 18. The first flat support plate 15 is mainly used to support the support roller bearing box 101.

[0068] Both ends of the first lead screw 14 are set as cylinders to penetrate the inner wall of the first mounting cavity 13;

[0069] The middle position of the first lead screw 14 is also set as a cylinder.

[0070] The transmission mechanism includes a gear 19 mounted on the cylinder at the end of the first lead screw 14, and a chain 20 for connecting the two gears 19 and meshing with the gears 19.

[0071] Three rectangular first positioning blocks 21 are provided at the bottom of the first mounting cavity 13 along its width toward the central axis.

[0072] The two first positioning blocks 21 correspond to the cylinders at the middle positions of the two first lead screws 14.

[0073] There is also a first positioning block 21 located between the two first lead screws 14.

[0074] The top of the first saddle 18 is set as an inclined surface, so that a V-shape is formed between the two first saddles 18. And the two first saddles 18 move in opposite / facing directions on the first thread 16.

[0075] The side of the first saddle 18 is designed in an inverted T shape.

[0076] The bottom sides of the first saddle 18 extend outward to form sliders 22. One slider 22 is adapted to the groove on the inner wall of the first mounting cavity 13, and the other slider 22 is adapted to the groove 23 provided in the first mounting cavity 13.

[0077] The chute 23 is located on one side of the first flat support plate 15 and has a certain gap with the first flat support plate 15.

[0078] The bottom of the first mounting cavity 13 is provided with three first slide rails 24 for the first saddle 18 to move.

[0079] The positions of the three first slide rails 24 also correspond to the positions of the three first positioning blocks 21, with the first positioning blocks 21 fixed on the first slide rails 24.

[0080] The first set of modules 11 includes a second module body 25, on which a second mounting cavity 26 is provided.

[0081] The second mounting cavity 26 is provided with a transverse second lead screw 27 and a second flat support plate 28.

[0082] The surface of the second lead screw 27 is provided with two mirror-symmetrical second threads 29.

[0083] The second thread 29 is provided with a second saddle 30, and the second saddle 30 is provided with an internal thread through hole at the position through which the second thread 29 passes.

[0084] The second flat support plate 28 is located at the top of the second mounting cavity 26 and on one side of the second saddle 30. The second flat support plate 28 is mainly used to support the support roller bearing box 101.

[0085] Both ends of the second lead screw 27 are cylindrical, which are used to penetrate the inner wall of the second mounting cavity 26.

[0086] The middle position of the second lead screw 27 is also set as a cylinder.

[0087] A second positioning block 31 is also provided at the bottom of the second mounting cavity 26 and at the center of its width.

[0088] The second positioning block 31 corresponds to the cylinder at the middle position of the second lead screw 27.

[0089] The top of the second saddle 30 is set as an inclined surface, so that a V-shape is formed between the two second saddles 30. And the two second saddles 30 move in opposite / facing directions on the second thread 29.

[0090] The side of the second saddle 30 is designed in an inverted T shape.

[0091] The bottom sides of the second saddle 30 extend outward to form sliders 32. One slider 32 is adapted to the groove on the inner wall of the second mounting cavity 26, and the other slider 32 is adapted to the groove 33 provided in the second mounting cavity 26.

[0092] The chute 33 is located on one side of the second flat support plate 28, and there is a certain gap between it and the second flat support plate 28.

[0093] The bottom of the second mounting cavity 26 is provided with a second slide rail 34 for the second saddle 30 to move.

[0094] The position of the second slide rail 34 also corresponds to the position of the second positioning block 31, and the second positioning block 31 is fixed on the second slide rail 34.

[0095] The present invention also provides a method for correcting the position of a broken roughing mill support roll, wherein the following steps are performed using the correction device for the position of a broken roughing mill support roll of the present invention:

[0096] S1. After a support roll breakage accident occurs on the roughing mill, first pull out the work roll, confirm the location of the broken roll, check the diameter of the broken roll 100, and obtain the L1 distance to be adjusted for the first saddle 18 and the second saddle 30 through the parameter table, or use the calculated trigonometric function results to move the distance of the first saddle 18 and the second saddle 30 outward. Use the handle to first rotate the second lead screw 27, which will drive the second saddle 30 forward or backward on the second slide rail 34. After adjusting the L1 distance of the second saddle 30, use a measuring tape to check it.

[0097] S2. Then, use the handle to rotate one of the first lead screws 14. The transmission mechanism on the first lead screw 14 causes both first lead screws 14 to rotate simultaneously. The first saddle nut 17 drives the first saddle 18 to move forward or backward on the first slide rail 24. After adjusting the L1 distance of the first saddle 18, use a tape measure to check it.

[0098] S3. Combine the first assembly module 10 and the second assembly module 11, with the longer section of the broken roller 100 fitting into the first assembly module 10, and the shorter section of the broken roller 100 fitting into the second assembly module 11, as follows: Figure 9 As shown;

[0099] S4. Push the first assembly module 10, the second assembly module 11, and the bracket into the frame. Using the up-and-down movement of the balance cylinder, the broken roller 100 is adjusted into position by the V-shaped first saddle 18 and second saddle 30. After moving the balance cylinder downwards into position, observe whether the support roller bearing box 101 and the first flat support plate 15 and second flat support plate 28 are in contact. Once in contact, pull out the first assembly module 10, the second assembly module 11, and the bracket along with the broken roller to complete the correction and removal of the broken roller. If not completely in contact, repeat the up-and-down movement of the balance cylinder several times until completely in contact.

[0100] The support rollers are available in six sizes, ranging from 1440 to 1630 mm: 1440 mm, 1478 mm, 1516 mm, 1554 mm, 1554 mm, 1592 mm, and 1630 mm. Parameters are calculated based on the different roller diameters. The opening distance of the V-shaped saddles (including the first saddle 18 and the second saddle 30) for different roller diameters is calculated to ensure that the centers of the two broken roller sections are on the same horizontal line.

[0101] Combination Figure 7 As shown, H is the distance from the center of the support roller 200 to the flat support plate (first flat support plate 15, second flat support plate 28); L1 is the distance from the inner side of the saddle (first saddle 18, second saddle 30) to the edge of the positioning block (first positioning block 21, second positioning block 31); L2 is the width of the positioning block (first positioning block 21, second positioning block 31).

[0102] The saddles (first saddle 18, second saddle 30) are right triangles with an acute angle of 30°.

[0103] The parameter table for step S1 above is shown in the table below:

[0104]

[0105]

[0106] The parameter table shows that for every 38mm increase in diameter based on a 1440mm diameter, the distance L1 will increase by approximately 36.75mm. Therefore, the parameter table can be further refined to make the data more accurate.

[0107] Combination Figure 8 As shown, the relationship between the radius change of the support roller 200 and the outward movement distance of the saddle (first saddle 18, second saddle 30) can also be calculated by trigonometric functions. In actual operation, the two can be used in combination to avoid errors.

[0108] Let the inclination angle of the saddles (first saddle 18, second saddle 30) be θ;

[0109] When the radius of the support roller 200 changes from OA1 to OA2, in order to keep the height of the steel coil center O unchanged, the saddle needs to be moved outward by a distance of A2B.

[0110] According to the parallelogram law, the angle of inclination θ is equal to angle A1BA2;

[0111] Therefore, the radius change value A1A2 of the support roller 200 and the outward displacement distance A2B of the saddle have the following relationship:

[0112] A1A2 / A2B=sinθ

[0113] Conclusion: When the angle θ is 30°, the saddle outward movement distance is twice the change in the radius of the support roller.

[0114] Those skilled in the art should recognize that the above embodiments are merely illustrative of the present invention and are not intended to limit the present invention. Any variations or modifications to the above embodiments that are within the spirit and essence of the present invention will fall within the scope of the claims of the present invention.

Claims

1. A device for correcting the position of a broken roughing mill support roll, characterized in that: Includes the first set of modules and the second set of modules; The first and second set modules have the same width; The length of the first set of modules is greater than the length of the second set of modules; The first kit module includes a first module body, on which a first mounting cavity is provided; The first mounting cavity is provided with two horizontally parallel first lead screws and a first flat support plate; The two first lead screws are connected by a transmission mechanism, and each of the first lead screws has two mirror-symmetrical first threads on its surface. The first thread is provided with a first saddle nut, and the first saddle nut is provided with a first saddle; The first flat support plate is located at the top of the first mounting cavity and on one side of the first saddle. The second module set includes a second module body, on which a second mounting cavity is provided; The second mounting cavity is provided with a second lead screw and a second flat support plate; The surface of the second lead screw is provided with two mirror-symmetrical second threads; The second thread is provided with a second saddle; The second flat support plate is located at the top of the second mounting cavity and on one side of the second saddle. The first and second sets of modules are used to correct the two broken rollers in the horizontal and left-right directions, so that the circular center lines of the two broken rollers are on the same axis.

2. The correction device for the broken roll position of the roughing mill support roll according to claim 1, characterized in that: Both ends of the first lead screw are cylindrical to be inserted into the inner wall of the first mounting cavity; The middle position of the first lead screw is also set as a cylinder.

3. The correction device for the broken roll position of the roughing mill support roll according to claim 2, characterized in that: The transmission mechanism includes a gear mounted on the cylindrical end of the first lead screw, and a chain for connecting the two gears and meshing with them.

4. The correction device for the broken roll position of the roughing mill support roll according to claim 2, characterized in that: The bottom of the first mounting cavity is also provided with three first positioning blocks along its width toward the central axis; The two first positioning blocks correspond to the cylinders located in the middle of the two first lead screws; One of the first positioning blocks is located between the two first lead screws.

5. The correction device for the broken roll position of the roughing mill support roll according to claim 4, characterized in that: The top of the first saddle is set as a slope, so that a V-shape is formed between the two first saddles; The side of the first saddle is designed in an inverted T shape; The bottom sides of the first saddle extend outward to form sliders. One side of the slider is adapted to the groove on the inner wall of the first mounting cavity, and the other side of the slider is adapted to the groove provided in the first mounting cavity. The bottom of the first mounting cavity is provided with three first slide rails for the first saddle to move; The positions of the three first slide rails also correspond to the positions of the three first positioning blocks, with the first positioning blocks fixed on the first slide rails.

6. The correction device for the broken roll position of the roughing mill support roll according to claim 1, characterized in that: Both ends of the second lead screw are cylindrical, so as to penetrate the inner wall of the second mounting cavity; The middle position of the second lead screw is also set as a cylinder; The second mounting cavity is further provided with a second positioning block at the bottom and at the center of its width; The second positioning block corresponds to the cylinder at the middle position of the second lead screw.

7. The correction device for the broken roll position of the roughing mill support roll according to claim 6, characterized in that: The top of the second saddle is set as a slope, so that a V-shape is formed between the two second saddles; The side of the second saddle is designed in an inverted T shape; The bottom sides of the second saddle extend outward to form sliders. One side of the slider is adapted to the groove on the inner wall of the second mounting cavity, and the other side of the slider is adapted to the groove provided in the second mounting cavity. The bottom of the second mounting cavity is provided with a second slide rail for the second saddle to move; The position of the second slide rail also corresponds to the position of the second positioning block, and the second positioning block is fixed on the second slide rail.

8. A method for correcting the position of a broken roughing mill support roll, characterized in that, The following steps are performed using the correction device for the broken roll position of the roughing mill support roll as described in any one of claims 1-7: S1. Confirm the location of the broken roller. Obtain the L1 distance to be adjusted for the first saddle and the second saddle by using the diameter of the broken roller. First, adjust the L1 distance of the second saddle and check it with a measuring tape. S2. Adjust the L1 distance of the first saddle again and check it with a measuring tape; S3. Combine the first set module and the second set module, with the longer section of the broken roller matching the first set module and the shorter section of the broken roller matching the second set module; S4. Push the first set module, the second set module, and the bracket into the frame. Through the up and down movement of the balance cylinder, the broken roller is adjusted into position under the action of the first saddle and the second saddle. After the balance cylinder is moved down into position, observe whether the support roller bearing box and the first flat support plate and the second flat support plate are in contact. After they are in contact, pull out the first set module, the second set module, and the bracket together with the broken roller to complete the correction and removal of the broken roller.

9. The method for correcting the position of a broken roughing mill support roll according to claim 8, characterized in that, The L1 distance of the first saddle is: the distance from the inner side of the first saddle to the edge of the first positioning block. The L1 distance of the second saddle is the distance from the inner side of the second saddle to the edge of the second positioning block.

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