Precise adjustment method for replacement device of vertical continuous casting straightening machine

Abstract

The present invention discloses a precise adjustment method for a replacement device of a vertical continuous casting straightener, comprising the following steps: adjusting a bidirectional slideway; adjusting a unidirectional slideway; adjusting a locking slideway; adjusting a fixed column of a replacement trolley; adjusting a rack of a transverse trolley; adjusting a cylindrical pin and a pin sleeve of the replacement trolley; and operating the replacement device of the vertical continuous casting straightener. This method uses a laser scanner to perform associated adjustment on multiple equipment components, simultaneously completing center adjustment and elevation adjustment, improving the installation accuracy and installation efficiency of the straightener replacement device, and realizing precise and efficient replacement of the vertical continuous casting straightener.

Description

Technical Field

[0001] The present invention belongs to the technical field of replacement and installation of continuous casting machine equipment, and particularly relates to an accurate adjustment method for a replacement device of a vertical continuous casting straightener. Background Art

[0002] The production process of continuously casting high-temperature molten steel into billets with a certain cross-sectional shape and certain dimensional specifications is called continuous casting of steel. The equipment required to complete this process is customarily called a continuous casting machine. The production process of the continuous casting machine is to continuously pour high-temperature molten steel into one or a group of water-cooled copper molds. The molten steel gradually solidifies into a shell along the periphery of the mold. When the molten steel level rises to a certain height and the shell solidifies to a certain thickness, the billet is pulled out by a straightener, and after being sprayed and cooled in the secondary cooling zone, the billet is completely solidified. Finally, it is cut into fixed lengths by a cutting device according to the requirements of rolling steel.

[0003] The quality of the billet is affected by the straightener in addition to being related to the mold. Therefore, the straightener needs to be regularly maintained and replaced. The replacement device of the straightener of the vertical continuous casting machine realizes up and down movement by relying on the slideways arranged on the vertical side walls of the underground foundation pit. However, due to the large height difference of the slideways and the narrow space of the underground foundation pit, when using a total station for equipment installation and adjustment, vertical measurement cannot be achieved due to the limitation of the elevation angle of the instrument's observation eyepiece. In addition, the measurement accuracy of the total station is within 0.5 mm, and only sub-millimeter level can be achieved. Moreover, due to setting up stations multiple times to change the instrument position, the cumulative measurement error value increases and cannot meet the requirement that the equipment installation and adjustment accuracy must be controlled within 0.5 mm. In addition to the total station, the elevation of the replacement device of the straightener needs to be detected and adjusted using a precise level, with many measurement points and a long adjustment period. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an accurate adjustment method for a replacement device of a vertical continuous casting straightener, improve the installation and adjustment accuracy of the replacement device of the vertical continuous casting straightener, and realize the stable operation of the equipment.

[0005] The technical solution adopted by the present invention to solve its technical problems is: to provide an accurate adjustment method for a replacement device of a vertical continuous casting straightener, which is characterized in that it is realized through a set of replacement devices for a vertical continuous casting straightener. The replacement device for the vertical continuous casting straightener includes a lifting trolley, a transverse trolley, and a replacement trolley. The four corners of the lifting trolley are respectively positioned by a two-way slideway, a one-way slideway, and two locking slideways. The lifting trolley is lifted by a winch located at the top of the slideway. The transverse trolley can reciprocate horizontally on the lifting trolley. The replacement trolley is detachably mounted on the top of the transverse trolley through a positioning seat. The top surface of the replacement trolley is provided with a replacement track, and the method includes the following steps:

[0006] S1. Adjust the double-direction slideway: First, temporarily fix the double-direction slideway on the foundation sidewall. Set up the measuring instrument on the base of the tension straightener. Press the spherical prism for laser measurement tightly against the double-direction slideway and the tension straightener positioning block to pick up their coordinate values. Analyze and calculate the distances between the longitudinal centerline of the continuous casting machine and the double-direction slideway center, and between the transverse centerline of the continuous casting machine and the double-direction slideway center. Based on the measured distances, compare with the design drawing dimensions and precisely adjust the position of the double-direction slideway;

[0007] S2. Adjust the single-direction slideway: Adjust the single-direction slideway with the double-direction slideway as the reference. First, adjust the longitudinal spacing of the single-direction slideway. Press the spherical prism tightly against the vertical facades of the two corresponding slideways on both sides of the longitudinal centerline of the continuous casting machine to pick up their coordinate values. Analyze the coordinate values and adjust the single-direction slideway to meet the dimensional requirements of the design drawing. Then, pick up the coordinate values of the tension straightener positioning block and the short side of the single-direction slideway to determine the deviation value of the single-direction slideway from the transverse centerline of the continuous casting machine and the relative deviation value between the double-direction slideway and the short side of the wing plate of the single-direction slideway. Based on the measured distances, compare with the design drawing dimensions and precisely adjust the position of the single-direction slideway;

[0008] S3. Adjust the locking slideway: Adjust the spacing between the two locking slideways so that the distance from the lifting trolley meets the design requirements. Respectively measure the distances between the locking slideway and the transverse centerline of the continuous casting machine, and between the locking slideway slot and the longitudinal centerline of the continuous casting machine through the spherical prism. Based on the measured distances, compare with the design drawing dimensions and precisely adjust the locking slideway;

[0009] S4. Adjust and replace the fixed column of the trolley: Temporarily fix the fixed column of the replacement trolley on the embedded parts of the foundation sidewall. Use the spherical prism to pick up the coordinate values of the tension straightener positioning block, the long side and the short side of the fixed column of the replacement trolley. Based on the measured distances, compare with the design drawing dimensions and precisely adjust the fixed column of the trolley;

[0010] S5. Adjust the rack of the transverse movement trolley: First, temporarily fix the rack on the lifting trolley, make the gear of the transverse movement trolley mesh with the rack. Move the transverse movement trolley until the replacement track on its top aligns with the replacement track on the base of the tension straightener. Then, use the spherical prism to pick up the coordinate values of the tension straightener positioning block, the replacement track on the base of the tension straightener, and the replacement track on the replacement trolley. By adjusting the position of the rack, make the deviations of the three from the longitudinal centerline of the continuous casting machine and the allowable elevation deviation meet the dimensional requirements of the design drawing;

[0011] S6. Adjust the cylindrical pin and bushing of the replacement trolley: First, install the cylindrical pin and bushing in groups and fix them on the fixed column of the replacement trolley and the column of the tension straightener base respectively. Move the transverse movement trolley. When the replacement track of the replacement trolley completely overlaps with the replacement track of the tension straightener base, mark the installation position of the bushing on the replacement trolley. By changing the fixed position of the cylindrical pin, make the positioning deviation of the bushing less than the dimensional requirements of the design drawing. Finally, weld the bushing on the replacement trolley;

[0012] S7. Operation of the Vertical Continuous Casting Straightening Machine Replacement Device: The lifting trolley moves up and down along the slideway under the lifting action of the hoist. When moving up and down, the replacement trolley is in the non-replacement position. When the transverse trolley drives the replacement trolley to move horizontally, the position of the pin sleeve is higher than that of the cylindrical pin, and at this time, the cylindrical pin and the pin sleeve do not interfere with each other. When replacing the straightening machine, the replacement trolley runs under the control of the rack to the upper part of the replacement track on the base of the straightening machine. The lifting trolley descends to insert the cylindrical pin into the pin sleeve, and the lifting trolley further descends to disconnect the transverse trolley from the replacement trolley, and then the replacement track is connected to replace the straightening machine.

[0013] Preferably, in S1, the bidirectional slideway is located on the billet discharging side of the continuous casting machine and is composed of two mutually perpendicular slideways. The structure of each slideway is a C-shaped cross-section, with the middle web as the long side and the two side wings as the short sides. The straightening machine positioning block is accurately positioned according to the transverse center line and the longitudinal center line of the continuous casting machine projected on the base of the straightening machine to form a control network.

[0014] Preferably, the picked coordinate values refer to placing the spherical prism closely against the point to be measured and then obtaining the readings through the measuring instrument. The picked coordinate values include the longitudinal center value, the transverse center value, and the elevation value. Among them, picking the coordinate values of the bidirectional slideway means obtaining the data by placing the spherical prism on the two vertically intersecting vertical surfaces of the bidirectional slideway, and measuring the coordinate values of the bidirectional slideway is carried out at the joint of each section of the bidirectional slideway.

[0015] Preferably, in S2, the unidirectional slideway is located on the billet discharging side of the continuous casting machine and on the other side of the longitudinal center line of the continuous casting machine relative to the bidirectional slideway. The allowable deviation of the long side of the web of the unidirectional slideway relative to the longitudinal center line of the continuous casting machine should be less than 0.20 mm; the allowable deviation of the short side of the wing plate of the unidirectional slideway on the side of the longitudinal center line of the continuous casting machine relative to the transverse center line of the continuous casting machine is less than 0.20 mm, and the relative position deviation of the short sides of the two wing plates at the same position is less than 0.10 mm.

[0016] Preferably, before S3, the lifting trolley is installed in place. After the lifting trolley is in place, first measure the distance between the transverse trolley track on the top of the lifting trolley and the transverse center line of the continuous casting machine and adjust it so that the allowable deviation value is less than 0.5 mm, and then carry out the locking slideway adjustment. The locking slideway does not contact the lifting trolley and only contacts when the locking device on the lifting trolley extends and inserts into the notch of the locking slideway in case of emergency.

[0017] Preferably, in S4, the fixed column of the replacement trolley is a rectangular tube structure; the coordinate value of the long side of the fixed column of the replacement trolley is associated with the transverse center line of the continuous casting machine and is used for pitch control; the short side of the fixed column of the replacement trolley is associated with the longitudinal center line of the continuous casting machine; the allowable deviation from the transverse center line of the continuous casting machine is less than 1 mm, and the allowable deviation from the longitudinal center line of the continuous casting machine is less than 0.5 mm.

[0018] Preferably, before S5, the transverse trolley is installed on the top track of the lifting trolley, and then the replacement trolley is installed in the top positioning seat of the transverse trolley; before adjusting the rack of the transverse trolley, it is necessary to complete the commissioning of the lifting trolley and the transverse trolley and they can be used normally; the allowable deviation between the rack of the transverse trolley and the longitudinal center line of the continuous casting machine is less than 0.5 mm; the allowable deviation value between the rack of the transverse trolley and the positioning block of the straightening machine and the elevation of the transverse trolley track is less than 0.2 mm.

[0019] Preferably, in S6, the positioning pin sleeve of the replacement trolley is of a conical structure, installed on the side of the replacement trolley, and is adapted to the cylindrical pin installed on the fixed column of the replacement trolley; the cylindrical pin is fixed on the fixed column of the replacement trolley and the base column of the straightening machine by welding with a steel plate; the allowable deviation of the positioning accuracy of the cylindrical pin is less than 0.5 mm.

[0020] Beneficial effects

[0021] The present invention provides a precise adjustment method for a replacement device of a vertical continuous casting straightening machine, and its technical advantages are as follows:

[0022] 1. Using a laser tracker to adjust the equipment, the adjustment accuracy is improved from sub-millimeter level to micron level, overcoming the adverse influence of the limited visual angle of the instrument, and realizing high-precision detection of omnidirectional scanning;

[0023] 2. Using a spherical prism to pick up coordinates overcomes the operation process of centering the bubble when setting up the prism. Due to the characteristic that the center of the spherical prism remains unchanged during the installation and adjustment process, the simultaneous adjustment of the center position and elevation of the equipment is realized;

[0024] 3. By accurately positioning the cylindrical pin and the pin sleeve, the centering accuracy of the replacement track of the replacement device is ensured, and the stability of the replacement trolley is also improved. Description of the drawings

[0025] Figure 1 It is a schematic diagram of the equipment layout of the replacement device of the vertical continuous casting straightening machine.

[0026] Figure 2 It is a schematic diagram of the installation of the measuring instrument.

[0027] Figure 3 It is a schematic diagram of the slideway adjustment.

[0028] Figure 4 It is a schematic diagram of the lifting trolley adjustment.

[0029] Figure 5 It is a schematic diagram of the transverse trolley running.

[0030] Wherein: 1 - Straightening machine replacement device; 2 - Bidirectional slideway; 3 - Unidirectional slideway; 4 - Locking slideway; 5 - Lifting trolley; 6 - Transverse trolley; 7 - Replacement trolley; 8 - Replacement track; 9 - Measuring instrument; 10 - Spherical prism; 11 - Straightening machine base; 12 - Longitudinal center line; 13 - Transverse center line; 14 - Positioning block; 15 - Locking slideway notch; 16 - Transverse trolley track; 17 - Fixed column; 18 - Rack; 19 - Cylindrical pin; 20 - Bush; 21 - Straightening machine base column; 22 - Winch.

[0031] The same reference numerals in the figures represent the same components. Specific embodiments

[0032] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of this application.

[0033] The following will be combined with Figures 1 to 5 Describe in detail the embodiments of the present invention.

[0034] The straightening machine replacement device 1 is composed of a slideway, a lifting trolley 5, a transverse trolley 6, and a replacement trolley 7. The lifting trolley 5 can move up and down in the slideway under the lifting of the winch 22; the winch 22 is located directly above the lifting trolley 5; the transverse trolley 6 can reciprocate on the top track of the lifting trolley 5 and is precisely positioned by the rack 18; the replacement trolley 7 is mounted on the top of the transverse trolley 6 through a positioning seat and moves synchronously with the transverse trolley 6. When replacing the straightening machine, it is fixed on the cylindrical pin 19 installed on the fixed column 17 of the replacement trolley through the bush 20.

[0035] A precise adjustment method for a vertical continuous casting straightening machine replacement device is specifically implemented by the following steps:

[0036] S1: Adjust the two-way slideway 2 to accurately position it in the control network. First, temporarily fix the two-way slideway 2 on the foundation sidewall. Set up the measuring instrument 9 on the base 11 of the tension leveller. Use the spherical prism 10 to closely adhere to the two-way slideway 2 and the tension leveller positioning block 14 to pick up its coordinate values. Analyze and calculate the distances between the longitudinal centerline 12 of the continuous casting machine and the transverse centerline 13 of the continuous casting machine and the center of the two-way slideway 2. After obtaining the deviation value by comparing with the design value on the drawing, accurately adjust the two-way slideway 2. The two-way slideway is located on the billet discharging side of the continuous casting machine and is composed of two mutually perpendicular slideways. The structure of each slideway is a C-shaped cross-section, with the middle web being the long side and the two side wings being the short sides. The measuring instrument 9 is a laser tracker, and its measuring accuracy is 0.02 mm, which is higher than the adjustment accuracy requirement that the allowable deviation of the vertical slideway centerline needs to reach 0.5 mm and the allowable deviation of the elevation is 0.2 mm. The control network is the transverse centerline 13 of the continuous casting machine and the longitudinal centerline 12 projected on the base of the tension leveller. The tension leveller positioning block 14 is accurately positioned according to it. Associating the coordinates of the two-way slideway 2 with the coordinates of the tension leveller positioning block 14 can achieve the accurate positioning of the two-way slideway 2 in the control network. The coordinate values picked up from the tension leveller positioning block 14 are the data measured by placing the spherical prism 10 on the tension leveller positioning block 14, and this coordinate value includes the longitudinal center value, the transverse center value, and the elevation value. The coordinate values picked up from the two-way slideway 2 are the data obtained by placing the spherical prism 10 on two perpendicular intersecting vertical surfaces of the two-way slideway 2. Measuring the coordinate values of the two-way slideway 2 is carried out at the joint of each section of the two-way slideway.

[0037] S2: Adjust the one-way slideway 3 based on the two-way slideway 2. First, adjust the longitudinal spacing of the one-way slideway 3. Use the spherical prism 10 to closely adhere to the vertical surfaces of the two corresponding slideways on both sides of the longitudinal centerline 12 of the continuous casting machine to pick up its coordinate values. Analyze the coordinate values to adjust the one-way slideway 3 to meet the requirements. Then pick up the coordinate values of the tension leveller positioning block 14 and the short side of the one-way slideway 3 to determine the deviation value of the one-way slideway 3 from the transverse centerline 13 of the continuous casting machine and the relative deviation value between the two-way slideway 2 and the short side of the wing plate of the one-way slideway 3. Adjust the one-way slideway 3 based on the analyzed data. The one-way slideway 3 is located on the billet discharging side of the continuous casting machine and on one side of the longitudinal centerline 12 of the continuous casting machine; the allowable deviation value of the long side of the web of the one-way slideway 3 relative to the longitudinal centerline 12 of the continuous casting machine is less than 0.20 mm, and the maximum and minimum values within the full length cannot exceed 0.5 mm; the allowable deviation of the short side of the wing plate of the one-way slideway 3 located on the side of the longitudinal centerline 12 of the continuous casting machine relative to the transverse centerline 13 of the continuous casting machine is less than 0.20 mm, and the relative position deviation of the short sides of the two wing plates at the same position is less than 0.10 mm;

[0038] S3: Adjust the spacing of the locking slideway 4 so that the distance between it and the lifting trolley 5 meets the design requirements. Measure and adjust the distances between the locking slideway 4 and the transverse centerline 13 of the continuous casting machine, between the notch 15 of the locking slideway and the longitudinal centerline 12 of the continuous casting machine, and between the locking slideway 4 and the body of the lifting trolley 5 to make them conform to the design values. Before this step, the lifting trolley 5 needs to be positioned first. After the lifting trolley 5 is positioned, measure the distance between the transverse trolley track 16 on the top of the lifting trolley 5 and the transverse centerline 13 of the continuous casting machine and adjust it so that the deviation value is less than 0.5 mm before adjusting the locking slideway 4; the locking slideway 4 does not contact the lifting trolley 5, and they only contact when the locking device on the lifting trolley 5 extends and inserts into the notch 15 of the locking slideway in case of emergency;

[0039] S4: Position the fixed column 17 of the replacement trolley. Temporarily fix the fixed column 17 of the replacement trolley on the embedded parts on the side wall of the foundation. Use the spherical prism 10 to pick up the coordinate values of the long side and short side of the straightening machine positioning block 14 and the fixed column 17 of the replacement trolley, and accurately adjust the distances between it and the longitudinal centerline (12) and transverse centerline (13) of the continuous casting machine. The fixed column (17) of the replacement trolley is a rectangular tube structure; the coordinate value of the long side of the fixed column (17) of the replacement trolley is associated with the transverse centerline (13) of the continuous casting machine and is used for span control; the short side of the fixed column (17) of the replacement trolley is associated with the longitudinal centerline (12) of the continuous casting machine, and the allowable deviation between it and the transverse centerline (13) of the continuous casting machine is less than 1 mm, and the allowable deviation of the longitudinal centerline (12) of the continuous casting machine is less than 0.5 mm;

[0040] S5: Position the rack 18 of the transverse trolley 6. First, temporarily fix the rack 18 on the lifting trolley 5, make the gear of the transverse trolley 6 mesh with the rack 18, move the transverse trolley 6 so that the replacement track 8 on its top is aligned with the replacement track 8 on the straightening machine base 11, and then use the spherical prism 10 to pick up the coordinate values of the straightening machine positioning block 14, the replacement track 8 on the straightening machine base 11, and the replacement track 8 on the replacement trolley 7. By changing the position of the rack 18, make the deviations of the three from the longitudinal centerline 12 of the continuous casting machine and the elevation deviation value conform to the design values. Before this step, the transverse trolley 6 needs to be positioned on the top track of the lifting trolley 5 first, and then the replacement trolley 7 needs to be positioned in the positioning seat on the top of the transverse trolley 6; before adjusting the rack 18 of the transverse trolley, the commissioning of the lifting trolley 5 and the transverse trolley 6 needs to be completed and they can be operated normally; the allowable deviation between the rack 18 of the transverse trolley and the transverse centerline 13 of the continuous casting machine is less than 0.5 mm, and the allowable deviation value of the elevation of the rack 18 of the transverse trolley from the straightening machine positioning block 14 and the transverse trolley track 16 is less than 0.2 mm;

[0041] S6: Install the cylindrical pin 19 and the pin sleeve 20 of the replacement trolley 7. First, install the cylindrical pin 19 and the pin sleeve 20 together in a group, and fix them on the fixed column 17 of the replacement trolley and the column 21 of the straightening machine base respectively. Move the transverse trolley 6. When the replacement track 8 of the replacement trolley 7 is completely overlapped with the replacement track 8 on the straightening machine base 11, mark the installation position of the pin sleeve 20 on the replacement trolley 7. By changing the fixed position of the cylindrical pin 19, the positioning deviation of the pin sleeve 20 is made less than the design value. Finally, weld the pin sleeve 20 to the replacement trolley 7. The positioning pin sleeve 20 of the replacement trolley 7 is a conical structure, which is installed on the side of the replacement trolley 7 and is compatible with the cylindrical pin 19 installed on the fixed column 17 of the replacement trolley. The cylindrical pin 19 is fixed to the fixed column 17 of the replacement trolley and the column 21 of the straightening machine base by steel plate welding. The positioning accuracy of the cylindrical pin 19 allows a deviation of less than 0.5mm.

[0042] S7: The vertical continuous casting straightening machine replacement device 1 is running, and the lifting trolley 5 runs up and down along the slideway under the lifting action of the winch 22. When running up and down, the replacement trolley is in a non-replacement position, so that the cylindrical pin 19 and the pin sleeve 20 do not interfere with each other. When the transverse trolley 6 drives the replacement trolley 7 to move transversely, the position of the pin sleeve 20 is higher than the cylindrical pin 19. When the straightening machine is replaced, the replacement trolley 7 runs to the top of the replacement track 8 on the straightening machine base 11 under the control of the rack 18, and the lifting trolley 5 descends to make the pin sleeve 20 located on the cylindrical pin 19, and the transverse trolley 6 is out of contact with the replacement trolley 7, and the replacement track 8 is connected to replace the straightening machine.

Claims

1. A precise adjustment method for a replacement device of a vertical continuous casting straightening machine, characterized in that It is realized by a vertical continuous casting straightening machine replacement device. The vertical continuous casting straightening machine replacement device includes a lifting trolley, a transverse trolley and a replacement trolley. The four corners of the lifting trolley are positioned respectively through a two-way slideway, a one-way slideway and two locking slideways. The lifting trolley is lifted by a hoist located at the top of the slideway. The transverse trolley can reciprocate horizontally on the lifting trolley. The replacement trolley is detachably mounted on the top of the transverse trolley through a positioning seat. A replacement track is provided on the top surface of the replacement trolley. It includes the following steps: S1. Adjust the two-way slideway: First, temporarily fix the two-way slideway on the side wall of the foundation. Mount the measuring instrument on the base of the straightening machine. Press the spherical prism for laser measurement tightly against the two-way slideway and the straightening machine positioning block to pick up its coordinate values. Analyze and calculate the distances between the longitudinal center line of the continuous casting machine and the transverse center line of the continuous casting machine and the center of the two-way slideway. Precisely adjust the position of the two-way slideway according to the measured distances and compare with the dimensions on the design drawing. S2. Adjust the one-way slideway: Adjust the one-way slideway based on the two-way slideway. First, adjust the longitudinal spacing of the one-way slideway. Press the spherical prism tightly against the vertical surfaces of the two corresponding slideways on both sides of the longitudinal center line of the continuous casting machine to pick up its coordinate values. Analyze the coordinate values to adjust the one-way slideway to meet the dimensional requirements of the design drawing. Then pick up the coordinate values of the straightening machine positioning block and the short side of the one-way slideway to determine the deviation value of the one-way slideway from the transverse center line of the continuous casting machine and the relative deviation value between the two-way slideway and the short side of the wing plate of the one-way slideway. Precisely adjust the position of the one-way slideway according to the measured distances and compare with the dimensions on the design drawing. S3. Adjust the locking slideway: Adjust the spacing between the two locking slideways so that the distance between them and the lifting trolley meets the design requirements. Respectively measure the distances between the locking slideway and the transverse center line of the continuous casting machine and the distance between the locking slideway slot and the longitudinal center line of the continuous casting machine through the spherical prism. Precisely adjust the locking slideway according to the measured distances and compare with the dimensions on the design drawing. S4. Adjust the fixed column of the replacement trolley: Temporarily fix the fixed column of the replacement trolley on the embedded part on the side wall of the foundation. Pick up the coordinate values of the straightening machine positioning block, the long side and the short side of the fixed column of the replacement trolley with the spherical prism. Precisely adjust the fixed column of the trolley according to the measured distances and compare with the dimensions on the design drawing. S5. Adjust the rack of the transverse trolley: First, temporarily fix the rack on the lifting trolley, make the gear of the transverse trolley mesh with the rack. Move the transverse trolley to align the replacement track on its top with the replacement track on the base of the straightening machine. Then use the spherical prism to pick up the coordinate values of the straightening machine positioning block, the replacement track on the base of the straightening machine and the replacement track on the replacement trolley. Adjust the position of the rack so that the deviations of the three from the longitudinal center line of the continuous casting machine and the allowable elevation deviation meet the dimensional requirements of the design drawing. S6. Adjust and replace the cylindrical pins and bushings of the replacement trolley: First, install the cylindrical pins and bushings in groups and fix them on the fixed columns of the replacement trolley and the base columns of the straightener respectively. Move the transverse trolley. When the replacement track of the replacement trolley is completely overlapped with the replacement track of the straightener base, mark the installation position of the bushing on the replacement trolley. By changing the fixed position of the cylindrical pin, make the positioning deviation of the bushing less than the requirements of the design drawing dimensions. Finally, weld the bushing on the replacement trolley. S7. Operation of the vertical continuous casting straightener replacement device: The lifting trolley moves up and down along the slideway under the lifting action of the winch. When moving up and down, the replacement trolley is in the non-replacement position. When the transverse trolley drives the replacement trolley to move horizontally, the position of the bushing is higher than that of the cylindrical pin, and at this time, the cylindrical pin and the bushing do not interfere with each other. When replacing the straightener, the replacement trolley runs to the upper part of the replacement track on the straightener base under the control of the rack. The lifting trolley descends to insert the cylindrical pin into the bushing, and the lifting trolley further descends to separate the transverse trolley from the replacement trolley, and then connect the replacement track to replace the straightener.

2. The precise adjustment method of a vertical continuous casting straightening machine replacement device according to claim 1, characterized in that In S1, the bidirectional slideway is located on the billet discharging side of the continuous casting machine and is composed of two mutually perpendicular slideways. The structure of each slideway is a C-shaped cross-section, with the middle web being the long side and the two side wings being the short sides. The straightener positioning block is accurately positioned according to the transverse center line and the longitudinal center line of the continuous casting machine projected on the straightener base to form a control network.

3. The precise adjustment method of a vertical continuous casting tension leveller replacement device according to claim 1, characterized in that The picked coordinate values refer to closely attaching the spherical prism to the point to be measured and then obtaining the readings through the measuring instrument. The picked coordinate values include the longitudinal center value, the transverse center value, and the elevation value. Among them, picking the coordinate values of the bidirectional slideway means obtaining the data by placing the spherical prism on the two perpendicular intersecting vertical surfaces of the bidirectional slideway. Measuring the coordinate values of the bidirectional slideway is carried out at the joints of each section of the bidirectional slideway.

4. The precise adjustment method of a vertical continuous casting straightening machine replacement device according to claim 1, characterized in that In S2, the unidirectional slideway is located on the billet discharging side of the continuous casting machine and on the other side of the longitudinal center line of the continuous casting machine relative to the bidirectional slideway. The allowable deviation of the long side of the web of the unidirectional slideway relative to the longitudinal center line of the continuous casting machine should be less than 0.20 mm; the allowable deviation of the short side of the wing plate of the unidirectional slideway on the side of the longitudinal center line of the continuous casting machine relative to the transverse center line of the continuous casting machine is less than 0.20 mm, and the relative position deviation of the short sides of the two wing plates at the same position is less than 0.10 mm.

5. The precise adjustment method of a vertical continuous casting straightening machine replacement device according to claim 1, characterized in that, Before S3, install the lifting trolley in place. After the lifting trolley is in place, first measure the distance between the transverse trolley track at the top of the lifting trolley and the transverse center line of the continuous casting machine and adjust it so that the allowable deviation value is less than 0.5 mm, and then carry out the locking slideway adjustment. The locking slideway does not contact the lifting trolley and only contacts when the locking device on the lifting trolley extends and inserts into the notch of the locking slideway in case of emergency.

6. The precise adjustment method for a vertical continuous casting straightening machine replacement device according to claim 1, characterized in that, In S4, the fixed column of the replacement trolley is of rectangular tube structure; the coordinate value of the long side of the fixed column of the replacement trolley is associated with the transverse center line of the continuous casting machine and is used for span control; the short side of the fixed column of the replacement trolley is associated with the longitudinal center line of the continuous casting machine; the allowable deviation from the transverse center line of the continuous casting machine is less than 1 mm, and the allowable deviation from the longitudinal center line of the continuous casting machine is less than 0.5 mm.

7. The precise adjustment method of a vertical continuous casting straightening machine replacement device according to claim 1, characterized in that Before S5, first install the transverse trolley on the top track of the lifting trolley, and then install the replacement trolley in the top positioning seat of the transverse trolley; before adjusting the rack of the transverse trolley, it is necessary to complete the commissioning of the lifting trolley and the transverse trolley and they can be used normally; the allowable deviation between the rack of the transverse trolley and the longitudinal center line of the continuous casting machine is less than 0.5 mm; the allowable deviation value between the rack of the transverse trolley and the positioning block of the straightening machine and the elevation of the transverse trolley track is less than 0.2 mm.

8. The precise adjustment method of a vertical continuous casting straightening machine replacement device according to claim 1, characterized in that, In S6, the positioning pin sleeve of the replacement trolley is a conical structure, installed on the side of the replacement trolley, and is adapted to the cylindrical pin installed on the fixed column of the replacement trolley; the cylindrical pin is fixed on the fixed column of the replacement trolley and the base column of the straightening machine by welding with a steel plate; the allowable deviation of the positioning accuracy of the cylindrical pin is less than 0.5 mm.

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