CN112658035A - Positioning and aligning method for rolling mill base plate and frame - Google Patents
Positioning and aligning method for rolling mill base plate and frame Download PDFInfo
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- CN112658035A CN112658035A CN202011372883.0A CN202011372883A CN112658035A CN 112658035 A CN112658035 A CN 112658035A CN 202011372883 A CN202011372883 A CN 202011372883A CN 112658035 A CN112658035 A CN 112658035A
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000005096 rolling process Methods 0.000 title claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 22
- 239000010959 steel Substances 0.000 claims abstract description 22
- 238000009434 installation Methods 0.000 abstract description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
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Abstract
The invention relates to the technical field of installation of a rolling mill stand, and provides a positioning and aligning method of a rolling mill bottom plate and a stand, which comprises the following steps: s1, hoisting the two bottom plates in place on the base plate group; leveling the bottom plate by adopting a frame type level meter; the longitudinal and transverse dimensions of the bottom plate are aligned by a theodolite, and the bottom plate is fixed on a foundation through foundation bolts after the alignment is finished; s2, hoisting the two racks in place on the bottom plate; leveling the frame by using a frame type level meter; the theodolite is adopted to align the longitudinal and transverse dimensions of the rack; the perpendicularity of the rack is aligned in a mode that the line weight is matched with the steel plate ruler. The theodolite is used for aligning the horizontal sizes of the bottom plate and the rack, the problem that the steel wire is easy to shake to cause alignment difficulty in the prior art is solved, the alignment efficiency is improved, the alignment quality is guaranteed, the service time of hoisting equipment is greatly shortened, and the service cost of the hoisting equipment is saved.
Description
Technical Field
The invention relates to the technical field of installation of a rolling mill stand, in particular to a positioning and aligning method of a rolling mill bottom plate and a rolling mill stand.
Background
The key control point for installing the rolling mill is the installation and alignment work of the bottom plate and the stand, the bottom plate is divided into an inlet side and an outlet side respectively according to a rail line, and the stand is divided into an operation side and a transmission side respectively according to the process position. In the installation process of the prior rolling mill, the adopted installation method is that the bottom plate and the rack are hoisted in place, then the bottom plate and the rack are roughly aligned, the hoisting equipment is removed after the rough alignment is finished, and then the rack is precisely aligned. When bottom plate and frame are in thick alignment, what adopt is that hang the copper wire and hang the center, and the horizontal dimension is measured with the steel rule, and the levelness is debugged with the flat rule, adopts the mode of hanging copper wire and steel rule to add up more operating error, and the copper wire appears rocking easily moreover, and this will show and increase the operating error and the alignment degree of difficulty for alignment time is longer, will occupy hoisting equipment for a long time, causes hoisting equipment's use cost higher.
Disclosure of Invention
The invention aims to provide a positioning and aligning method of a rolling mill base plate and a frame, so as to save the use cost of hoisting equipment.
The technical scheme adopted by the invention for solving the technical problems is as follows: the positioning and aligning method of the rolling mill base plate and the frame comprises the following steps:
s1, positioning and aligning the bottom plate of the rolling mill;
arranging a transverse center line and a longitudinal center line on the basis; placing a plurality of cushion plate groups on the surface of the pitted surface chiseled foundation, and leveling and measuring the elevation of each cushion plate group by adopting a precision level gauge;
hoisting the two bottom plates in place on the base plate group; leveling the bottom plate by adopting a frame type level meter; the longitudinal and transverse dimensions of the bottom plate are aligned by a theodolite, and the bottom plate is fixed on a foundation through foundation bolts after the alignment is finished;
s2, positioning and aligning the rolling mill frame;
hoisting the two racks in place on the bottom plate; leveling the frame by using a frame type level meter; the theodolite is adopted to align the longitudinal and transverse dimensions of the rack; the perpendicularity of the rack is aligned in a mode that the line weight is matched with the steel plate ruler.
Further, in step S1, when the level of each pad group is measured by using the leveling instrument, the level of each pad group should be controlled to be higher than the designed value by 1 mm.
Further, in step S1, each pad set includes a flat pad and at least one pair of inclined pads for adjusting the height of the flat pad.
Further, in step S1, the method for aligning the longitudinal and transverse dimensions of the bottom plate by using the theodolite includes the following steps:
s1.1, erecting a theodolite on a longitudinal central line, and measuring the distance from a measuring point on each bottom plate to the longitudinal central line; then calculating the difference between the measured value and the designed value, and finishing the transverse dimension alignment of the bottom plate when the difference is within the deviation range;
s1.2, erecting a theodolite on a transverse central line, and measuring the distance from a measuring point on each bottom plate to the transverse central line; then, the difference between the measured value and the design value is calculated, and when the difference is within the deviation range, the transverse dimension alignment of the base plate is completed.
Further, in step S2, the method for aligning the longitudinal and transverse dimensions of the rack by using the theodolite includes the following steps:
s2.1, erecting a theodolite on a longitudinal central line, and measuring the distance from a measuring point on each rack to the longitudinal central line; then calculating the difference between the measured value and the designed value, and finishing the transverse size alignment of the rack when the difference is within the deviation range;
s2.2, erecting a theodolite on a transverse central line, and measuring the distance from a measuring point on each rack to the transverse central line; then, the difference between the measured value and the design value is calculated, and when the difference is within the deviation range, the longitudinal dimension alignment of the rack is completed.
The invention has the beneficial effects that: according to the in-place alignment method for the bottom plate and the rack of the rolling mill, the theodolite is used for aligning the horizontal sizes of the bottom plate and the rack, the problem that in the prior art, alignment is difficult due to the fact that a steel wire is prone to shaking is solved, alignment efficiency is improved, alignment quality is guaranteed, the service time of hoisting equipment is greatly shortened, and the use cost of the hoisting equipment is saved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below; it is obvious that the drawings in the following description are only some embodiments described in the present invention, and that other drawings can be obtained from these drawings by a person skilled in the art without inventive effort.
FIG. 1 is a schematic view of the mill stand and stand in place;
FIG. 2 is a schematic view of a configuration for measuring the longitudinal and transverse dimensions of a mill base plate and a stand;
fig. 3 is a schematic view of a structure for measuring the perpendicularity of a rolling stand.
The reference numbers in the figures are: 1-transverse center line, 2-longitudinal center line, 3-bottom plate, 4-frame level, 5-frame, 6-theodolite, 7-steel support, 8-steel wire and 9-wire weight.
Detailed Description
In order that those skilled in the art will better understand the present invention, the following further description is provided in conjunction with the accompanying drawings and examples. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. The embodiments and features of the embodiments of the invention may be combined with each other without conflict.
Referring to fig. 1 to 3, a method for aligning the positions of a rolling mill base plate and a stand according to an embodiment of the present invention includes the following steps:
s1, positioning and aligning the rolling mill bottom plate 3;
arranging a transverse central line 1 and a longitudinal central line 2 on the basis; placing a plurality of cushion plate groups on the surface of the pitted surface chiseled foundation, and leveling and measuring the elevation of each cushion plate group by adopting a precision level gauge;
hoisting the two bottom plates 3 in place on the base plate group; leveling the bottom plate 3 by adopting a frame type level meter 4; the longitudinal and transverse dimensions of the bottom plate 3 are aligned by adopting a theodolite 6, and the bottom plate 3 is fixed on a foundation through foundation bolts after the alignment is finished;
s2, aligning the mill frame 5 in position;
hoisting two racks 5 in place on the bottom plate 3; leveling the frame 5 by using a frame type level 4; the theodolite 6 is adopted to align the longitudinal and transverse dimensions of the frame 5; the perpendicularity of the frame 5 is aligned in a mode that the line weight is matched with the steel plate ruler.
By arranging the transverse center line 1 and the longitudinal center line 2 which are perpendicular to each other on the foundation, a reference is provided for the positioning and alignment of the bottom plate 3 and the machine frame 5. Before the bottom plate 3 is in place, the foundation surface at the secondary grouting position is cleaned of floating slurry and chiseled into a pitted surface so as to ensure the quality of the subsequent secondary grouting.
Placing a plurality of base plate groups for supporting the base plate 3 on the foundation surface according to the external dimension and bearing weight of the base plate 3; each cushion plate group comprises a flat cushion plate and at least one pair of inclined cushion plates for adjusting the height of the flat cushion plate. After the base plate group is arranged, the upper surfaces of all the flat base plates are leveled and the elevation is measured through a precision level gauge, and when the levelness and the elevation of the upper surfaces of the flat base plates are unqualified, the inclined base plates are adjusted until the levelness and the elevation of the upper surfaces of the flat base plates are qualified. The levelness of the upper surface of the flat base plate is within 0.04mm/m, and the elevation deviation of the upper surface of the flat base plate is +/-0.3 mm.
The precision level is a level with the precision higher than +/-1 mm/km. Through setting up accurate surveyor's level, need not to adopt the mode of drawing steel wire cooperation steel rule again to make level and the measurement of elevation to backing plate group, not only improved the alignment precision, improved alignment efficiency moreover. Preferably, in step S1, when the level of each pad group is measured by using the leveling instrument, the level of each pad group is controlled to be higher than the designed value by 1 mm. In this way, when subsequently fixing the base plate 3, the elevation drop due to the fastening of the anchor bolts can be compensated.
After the two bottom plates 3 are hoisted in place on the base plate group by adopting hoisting equipment, the levelness and the longitudinal and transverse sizes of the bottom plates 3 need to be aligned, and the bottom plates 3 are fixed on a foundation through foundation bolts after the alignment is finished. The levelness of the bottom plate 3 is within 0.05 mm/m; the deviation of the longitudinal and transverse dimensions of the bottom plate 3 is +/-0.3 mm.
In the embodiment of the invention, frame-type gradienters 4 with the precision of 0.02mm/m are adopted to align the levelness of the bottom plates 3, specifically, two frame-type gradienters 4 are arranged on the upper surface of each bottom plate 3, and when the levelness of the bottom plates 3 is unqualified, the levelness of the bottom plates 3 is adjusted by using sizing blocks until the levelness is qualified.
In step S1, the theodolite 6 is used to align the vertical and horizontal dimensions of the bottom plate 3. Specifically, the method for aligning the longitudinal and transverse dimensions of the bottom plate 3 by adopting the theodolite 6 comprises the following steps:
s1.1, erecting a theodolite 6 on a longitudinal central line 2, and measuring the distance from a measuring point on each bottom plate 3 to the longitudinal central line 2; then calculating the difference between the measured value and the designed value, and finishing the transverse dimension alignment of the bottom plate 3 when the difference is within the deviation range;
s1.2, erecting a theodolite 6 on a transverse central line 1, and measuring the distance from a measuring point on each bottom plate 3 to the transverse central line 1; then, the difference between the measured value and the design value is calculated, and when the difference is within the deviation range, the lateral dimension alignment of the base plate 3 is completed.
For example, taking one of the bottom plates 3 as an example, when the transverse dimension of the bottom plate 3 is found, referring to fig. 1, the theodolite 6 is erected on the longitudinal center line 2, and the position of the theodolite 6 is adjusted; with reference to fig. 2, two measuring points a1, a2 are selected on the floor 3; the horizontal distances a1 and a2 from the longitudinal center line 2 of A1 and A2 are measured by the theodolite 6 respectively, if the difference between a1 and a2 and the design value is out of the range of +/-0.3 mm, the transverse dimension alignment of the bottom plate 3 is not completed, the position of the bottom plate 3 is continuously adjusted until the difference between a1 and a2 and the design value is within the range of +/-0.3 mm, and the transverse dimension alignment of the bottom plate 3 is completed.
For example, taking one of the bottom plates 3 as an example, when the longitudinal dimension of the bottom plate 3 is found, referring to fig. 1, the theodolite 6 is erected on the transverse center line 1, and the position of the theodolite 6 is adjusted; with reference to fig. 2, two measuring points B1, B2 are selected on the floor 3; the horizontal distances from the B1 and the B2 to the transverse center line 1 are respectively measured as B1 and B2 by the theodolite 6, if the difference between the B1 and the B2 and the design value is out of the range of +/-0.3 mm, the longitudinal dimension alignment of the bottom plate 3 is not finished, the position of the bottom plate 3 is continuously adjusted until the difference between the B1 and the B2 and the design value is within the range of +/-0.3 mm, and the longitudinal dimension alignment of the bottom plate 3 is finished.
After the two racks 5 are hoisted in place on the bottom plate 3 by adopting hoisting equipment, the levelness, the longitudinal and transverse dimensions and the verticality of the racks 5 need to be aligned. The levelness of the rack 5 is within 0.05 mm/m; the deviation of the longitudinal and transverse dimensions of the rack 5 is +/-0.3 mm, and the verticality of the rack 5 is within 0.05 mm/m. The contact gap between the frame 5 and the bottom plate 3 is checked by a 0.05mm feeler gauge, which is required to be not inserted. After the initial alignment of the frame 5 is completed, the hoisting equipment can be removed, and then the frame is precisely aligned.
In the embodiment of the invention, the frame type level meter 4 with the precision of 0.02mm/m is adopted to align the levelness of the rack 5, specifically, the frame type level meter 4 is placed on a horizontal reference surface machined on the rack 5, and when the levelness of the rack 5 is unqualified, the levelness of the rack 5 is adjusted through the sizing block until the levelness is qualified.
In step S2, the theodolite 6 is used to align the vertical and horizontal dimensions of the bottom plate 3. Specifically, the method for aligning the longitudinal and transverse dimensions of the rack 5 by using the theodolite 6 comprises the following steps:
s2.1, erecting a theodolite 6 on the longitudinal central line 2, and measuring the distance from a measuring point on each rack 5 to the longitudinal central line 2; then calculating the difference between the measured value and the designed value, and finishing the transverse dimension alignment of the rack 5 when the difference is within the deviation range;
s2.2, erecting the theodolite 6 on the transverse central line 1, and measuring the distance from a measuring point on each rack 5 to the transverse central line 1; then, the difference between the measured value and the design value is calculated, and when the difference is within the deviation range, the longitudinal dimension alignment of the rack 5 is completed.
For example, taking one of the racks 5 as an example, when the transverse dimension of the rack 5 is found, referring to fig. 1, the theodolite 6 is erected on the longitudinal center line 2, and the position of the theodolite 6 is adjusted; with reference to fig. 2, two measuring points C1, C2 are selected on the frame 5; the horizontal distances from the C1 and the C2 to the longitudinal center line 2 are respectively measured as C1 and C2 by the theodolite 6, if the difference between the C1 and the C2 and the design value is out of the range of +/-0.3 mm, the transverse dimension alignment of the bottom plate 3 is not finished, the position of the bottom plate 3 is continuously adjusted until the difference between the C1 and the C2 and the design value is within the range of +/-0.3 mm, and the transverse dimension alignment of the rack 5 is finished.
For example, taking one of the racks 5 as an example, when the longitudinal dimension of the rack 5 is found, referring to fig. 1, the theodolite 6 is erected on the transverse center line 1, and the position of the theodolite 6 is adjusted; with reference to fig. 2, two measuring points D1, D2 are selected on the gantry 5; the horizontal distances D1 and D2 from the D1 and the D2 to the transverse center line 1 are measured by the theodolite 6 respectively, if the difference between the D1 and the D2 and the design value is within the range of +/-0.3 mm, the longitudinal size alignment of the rack 5 is not completed, the position of the rack 5 is continuously adjusted until the difference between the D1 and the D2 and the design value is within the range of +/-0.3 mm, and the longitudinal size alignment of the rack 5 is completed.
In the embodiment of the invention, the perpendicularity of the rack 5 is aligned in a way of matching the line weight with the steel plate ruler. For example, referring to fig. 3, a steel bracket 7 is fixed above the frame 5, a steel wire 8 with a diameter of 0.5mm is hung on the steel bracket 7, a wire weight 9 is hung at the lower end of the steel wire 8, and the steel wire is vertically straightened by the wire weight 9. Selecting two measuring points E1, E2 on a vertical reference plane of the frame 5, wherein the measuring point E1 is located above the measuring point E2; measuring horizontal distances E1 and E2 from the E1 and E2 to the steel wire 8 by a steel plate ruler; the length between E1 and E2 measured by a steel plate ruler is L, and the verticality of the frame 5 is L
If the verticality of the rack 5 is larger than 0.05mm/m, the verticality alignment of the rack 5 is not completed, the position of the rack 5 is continuously adjusted until the verticality of the rack 5 is smaller than or equal to 0.05mm/m, and the verticality alignment of the rack 5 is completed.
According to the in-place alignment method for the bottom plate and the rack of the rolling mill, the theodolite 6 is used for aligning the horizontal sizes of the bottom plate 3 and the rack 5, the problem that in the prior art, a steel wire is easy to shake to cause alignment difficulty is solved, the alignment efficiency is improved, the alignment quality is guaranteed, the service time of hoisting equipment is greatly shortened, and the use cost of the hoisting equipment is saved.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The positioning and aligning method of the rolling mill base plate and the stand is characterized by comprising the following steps:
s1, aligning the mill bottom plate (3) in place;
arranging a transverse central line (1) and a longitudinal central line (2) on the basis; placing a plurality of cushion plate groups on the surface of the pitted surface chiseled foundation, and leveling and measuring the elevation of each cushion plate group by adopting a precision level gauge;
hoisting the two bottom plates (3) in place on the cushion plate group; leveling the bottom plate (3) by adopting a frame type level meter (4); the longitudinal and transverse dimensions of the bottom plate (3) are aligned by adopting a theodolite (6), and the bottom plate (3) is fixed on a foundation through foundation bolts after the alignment is finished;
s2, aligning the mill frame (5) in position;
hoisting the two racks (5) in place on the bottom plate (3); leveling the rack (5) by adopting a frame type level meter (4); the longitudinal and transverse dimensions of the rack (5) are aligned by adopting a theodolite (6); the verticality of the rack (5) is aligned in a mode of matching the line weight with the steel plate ruler.
2. The method for aligning the positions of the rolling mill bottom plate and the stand according to claim 1, wherein in the step S1, when the level of each of the shim plate groups is measured by using a level gauge, the level of each of the shim plate groups is controlled to be 1mm higher than a designed value.
3. The method of claim 1, wherein each of the pad groups comprises a flat pad and at least one pair of inclined pads for adjusting the height of the flat pad in step S1.
4. The method for aligning the positions of the bottom plate and the stand of the rolling mill according to claim 1, wherein in the step S1, the method for aligning the longitudinal and transverse dimensions of the bottom plate (3) by using the theodolite (6) comprises the following steps:
s1.1, erecting a theodolite (6) on a longitudinal central line (2), and measuring the distance from a measuring point on each bottom plate (3) to the longitudinal central line (2); then calculating the difference between the measured value and the designed value, and finishing the transverse dimension alignment of the bottom plate (3) when the difference is within the deviation range;
s1.2, erecting a theodolite (6) on a transverse central line (1), and measuring the distance from a measuring point on each bottom plate (3) to the transverse central line (1); then, the difference between the measured value and the design value is calculated, and when the difference is within the deviation range, the transverse dimension alignment of the bottom plate (3) is completed.
5. Method for aligning the stand and the floor of a rolling mill according to claim 1, characterized in that in step S2, the method for aligning the longitudinal and transverse dimensions of the stand (5) by using the theodolite (6) comprises the following steps:
s2.1, erecting a theodolite (6) on a longitudinal central line (2), and measuring the distance from a measuring point on each rack (5) to the longitudinal central line (2); then calculating the difference between the measured value and the designed value, and finishing the transverse size alignment of the rack (5) when the difference is within the deviation range;
s2.2, erecting a theodolite (6) on the transverse central line (1), and measuring the distance from a measuring point on each rack (5) to the transverse central line (1); the difference between the measured value and the design value is then calculated, and when the difference is within the deviation range, the longitudinal dimension alignment of the gantry (5) is completed.
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| CN202011372883.0A CN112658035A (en) | 2020-11-30 | 2020-11-30 | Positioning and aligning method for rolling mill base plate and frame |
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Cited By (1)
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|---|---|---|---|---|
| CN115014302A (en) * | 2022-06-17 | 2022-09-06 | 中国三冶集团有限公司 | Installation and measurement method for continuous metallurgical process equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115014302A (en) * | 2022-06-17 | 2022-09-06 | 中国三冶集团有限公司 | Installation and measurement method for continuous metallurgical process equipment |
| CN115014302B (en) * | 2022-06-17 | 2024-04-23 | 中国三冶集团有限公司 | Installation and measurement method for continuous metallurgical process equipment |
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Application publication date: 20210416 |