CN115647061A - Method for adjusting center line offset of unloading of rolling mill stand - Google Patents
Method for adjusting center line offset of unloading of rolling mill stand Download PDFInfo
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- CN115647061A CN115647061A CN202211184557.6A CN202211184557A CN115647061A CN 115647061 A CN115647061 A CN 115647061A CN 202211184557 A CN202211184557 A CN 202211184557A CN 115647061 A CN115647061 A CN 115647061A
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Abstract
The invention provides a method for adjusting the offset of a unloading center line of a rolling mill stand, which comprises the following steps: testing, namely testing the deviation condition of the central line of the rolling mill frame and a preset unloading central line; marking, namely marking the position of the rolling stand to be adjusted on a unloading buttress at the bottom of the rolling stand according to the deviation condition; an adjusting step, namely jacking up the rolling stand, and then lowering and adjusting the rolling stand according to the marked position of the rolling stand needing to be adjusted; and retesting, namely testing whether the deviation between the central line of the rolling mill stand and the unloading central line meets the unloading requirement, and if so, finishing the adjustment. The invention can effectively ensure that the deviation between the central line of the rolling mill stand and the unloading central line meets the unloading requirement, ensures that the unloading position of the rolling mill stand is accurate, has simple operation, improves the adjustment efficiency, does not need to use a large crane, saves the cost and can solve the problem that the position of the rolling mill stand after unloading is not correct and can not be adjusted.
Description
Technical Field
The invention relates to the technical field of equipment installation, in particular to a method for adjusting the deviation of a central line of a roll stand unloading machine.
Background
The oversize rolling mill frame is heavy in weight, when the hydraulic axis truck is used for self-unloading, the rolling mill frame is transported to an unloading position, the axis truck plates descend, the rolling mill frame falls on the unloading buttress, the central line of the rolling mill frame and the unloading central line are measured, the central line of the rolling mill frame and the unloading central line have large offset, the unloading requirement cannot be met, and the adjustment cannot be carried out after the unloading.
Disclosure of Invention
In view of the above, the invention provides a method for adjusting the deviation of the unloading center line of a rolling mill stand, and aims to solve the problem that the deviation between the unloading center line and the center line of the rolling mill stand after the rolling mill stand falls on an unloading buttress in the prior art cannot meet the unloading requirement.
The invention provides a method for adjusting the deviation of a unloading center line of a rolling mill stand, which comprises the following steps: a testing step, testing the deviation condition of the central line of the rolling mill stand and a preset unloading central line; marking, namely marking the position of the rolling stand to be adjusted on an unloading buttress at the bottom of the rolling stand according to the deviation condition; an adjusting step, namely jacking up the rolling stand, and then lowering and adjusting the rolling stand according to the marked position of the rolling stand needing to be adjusted; and retesting, namely testing whether the deviation between the central line of the rolling mill stand and the unloading central line meets the unloading requirement, and if so, finishing the adjustment.
Further, in the method for adjusting the center line offset of the unloading of the rolling mill stand, the testing step further comprises: a selecting substep of selecting a reference point on the top surface of the mill stand; a setting substep, namely setting an auxiliary center line at a first preset distance from the unloading center line, wherein the auxiliary center line is parallel to the unloading center line; a measuring sub-step of measuring an actual distance between the auxiliary center line and the reference point; and a calculating substep of calculating a deviation value between the measured actual distance and the theoretical distance and determining the deviation direction of the central line of the rolling stand.
Further, in the adjusting method for the rolling mill stand unloading center line offset, in the substep of selecting, a reference point is set on the top surface of the stand and at a second preset distance from the side machining surface of the rolling mill stand, and the reference point corresponds to the position of the rolling mill stand hoisting clamp.
Further, in the adjusting method of the mill stand unloading center line offset, in the substep of calculating, the theoretical distance is a sum of a design distance between the lateral machined surface of the mill stand and the auxiliary center line and a second preset distance.
Further, in the method for adjusting the deviation of the unloading center line of the rolling stand, in the marking step, the position of the rolling stand to be adjusted is marked on the unloading buttress according to the calculated deviation value and the determined deviation direction, and the position of the rolling stand to be adjusted is the position deviating from the deviation value in the direction opposite to the deviation direction.
Further, in the adjusting method for the deviation of the unloading center line of the rolling stand, in the adjusting step, the rolling stand is jacked up by using the transport vehicle, and the rolling stand is adjusted to be in a horizontal state after jacking up.
Further, in the adjusting method for the mill stand unloading center line deviation, in the adjusting step, according to the position of the marked mill stand needing to be adjusted, one side of the mill stand is firstly lowered by using a hydraulic system of a transport vehicle, then the other side of the mill stand is lowered, and the lowering process is repeated until the position of the mill stand on the unloading buttress is coincided with the position of the mill stand needing to be adjusted.
Further, in the method for adjusting the center line offset of the unloading of the rolling stand, the side on which the rolling stand first descends is the side opposite to the offset direction.
Further, in the method for adjusting the deviation of the unloading center line of the rolling stand, the distances of the rolling stand descending each time are equal.
Further, in the adjusting method for the deviation of the unloading center line of the rolling mill stand, in the retest step, if the deviation between the center line of the rolling mill stand and the unloading center line does not meet the unloading requirement, the adjusting step and the retest step are repeated until the deviation between the center line of the rolling mill stand and the unloading center line meets the unloading requirement, and the adjustment is stopped.
According to the invention, according to the deviation condition of the central line of the rolling stand and the preset unloading central line, the position of the rolling stand required to be adjusted is marked on the unloading buttress, then the lower placing side of the jacked stand is adjusted until the position of the rolling stand on the unloading buttress is matched with the position of the rolling stand required to be adjusted, whether the deviation between the central line of the rolling stand and the unloading central line meets the unloading requirement is retested, if the deviation is combined, the adjustment is completed, therefore, the deviation between the central line of the rolling stand and the unloading central line can be effectively ensured to meet the unloading requirement, the unloading position of the rolling stand is ensured to be accurate, the operation is simple, the adjustment efficiency is improved, a large-scale crane is not required, the cost is saved, the problem that the deviation between the central line of the rolling stand and the unloading central line after the rolling stand falls on the unloading buttress in the prior art cannot meet the unloading requirement is solved, and the problem that the position of the rolling stand cannot be adjusted because the position is not aligned after the unloading can be solved.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a flow chart of a method for adjusting a center line offset of a roll stand unloading truck according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a test offset condition in a method for adjusting the center line offset of a roll stand unloading truck according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of marking a position of a roll stand to be adjusted in the method for adjusting the center line offset of the roll stand unloading according to the embodiment of the present invention;
FIG. 4 is an enlarged view of a portion A of FIG. 3;
FIG. 5 is a schematic side view of a unloading buttress marking a position of a rolling stand to be adjusted in the method for adjusting the center line offset of the unloading of the rolling stand according to the embodiment of the present invention;
FIG. 6 is a schematic diagram of a roll stand when the roll stand is not lifted up in the method for adjusting the center line offset of the roll stand unloading according to the embodiment of the present invention;
FIG. 7 is a schematic view of a roll stand after being jacked up in a method for adjusting center line offset of a roll stand unloading according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of a measuring point in the method for adjusting the center line offset of the unloading truck of the rolling mill stand according to the embodiment of the present invention;
FIG. 9 is a schematic view of a method for adjusting the center line offset of a roll stand unloader according to an embodiment of the present invention;
FIG. 10 is a schematic view of the roll stand lowering and adjusting method for adjusting the center line offset of the roll stand unloading according to the embodiment of the present invention;
FIG. 11 is a schematic diagram of retesting offset in the method for adjusting center line offset of a roll stand unloading according to an embodiment of the present invention;
fig. 12 is a schematic side view of a unloading buttress during retesting in the method for adjusting the center line offset of the roll stand unloading according to the embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1, fig. 1 is a flowchart of a method for adjusting a center line offset of a roll stand unloading according to an embodiment of the present invention. As shown in the figure, the method for adjusting the center line offset of the unloading of the rolling mill stand comprises the following steps:
and a testing step S1, testing the deviation condition of the central line of the rolling mill frame and a preset unloading central line.
Specifically, the testing step S1 further includes:
a selection substep S11 selects a reference point on the top surface of the rolling stand.
Specifically, referring to fig. 2, a reference point 7 is provided on the top surface of the stand and at a second predetermined distance from the side machined surface of the mill stand, reference point 7 corresponding to the location of the mill stand lifting clamp. That is to say, the reference point 7 is arranged on the top face of the stand and has a second preset distance from the lateral machined face of the rolling stand, which belongs to the stand itself well defined. Meanwhile, the reference point 7 also corresponds to a part of the rolling stand hoisting clamp.
In specific implementation, the second preset distance may be determined according to an actual situation, and this embodiment does not limit this. In this embodiment, the second predetermined distance is 30mm.
In this embodiment, the future lifted jig position of the mill stand is used as a reference point. Because the prism is not easy to be erected on the side surface of the rolling stand, the reference point 7 is marked at the position 30mm away from the side surface mechanical processing surface of the rolling stand on the upper surface of the stand by taking the side surface mechanical processing surface of the rolling stand as a reference.
Referring to fig. 2, the frame 5 is placed on a transport cart 6.
A substep S12 of setting an auxiliary centerline at a first predetermined distance from the unloading centerline, the auxiliary centerline being parallel to the unloading centerline.
Specifically, the unloading center line is preset and can be marked on the ground. The first preset distance may be determined according to actual conditions, and this embodiment does not limit this.
Referring to fig. 2, an auxiliary centerline 2 is disposed at a first predetermined distance with respect to the unloading centerline 1, and the auxiliary centerline 2 is parallel to the unloading centerline 1.
A measurement substep S13, measuring the actual distance between the secondary centreline and the reference point.
In particular, the actual distance between the auxiliary centre line 2 and the reference point 7 is measured with a total station.
And a calculation substep S14 of calculating a deviation value between the measured actual distance and the theoretical distance and determining a deviation direction of the center line of the rolling stand.
Specifically, the theoretical distance is the sum of the design distance between the lateral machined surface of the mill stand and the auxiliary center line and a second preset distance. And judging whether the deviation meets the unloading requirement or not according to the measured deviation value between the actual distance and the theoretical distance, and if not, continuing the following steps.
For example, referring to fig. 2, the theoretical distance is represented as Y, the actual distance between the auxiliary center line and the reference point is 30mm more than the theoretical distance Y, and the entire rolling stand needs to be adjusted to the left by 30mm because the second preset distance is added to the design distance between the lateral machined surface of the rolling stand and the auxiliary center line.
And a marking step S2, marking the position of the rolling stand to be adjusted on the unloading buttress at the bottom of the rolling stand according to the deviation condition.
Specifically, referring to fig. 3 to 5, the position 8 of the roll stand to be adjusted is marked on the dump pier 4 based on the calculated offset value and the determined direction of deviation, and the position 8 of the roll stand to be adjusted is a position deviated from the offset value in the direction opposite to the direction of deviation.
For example, if the whole mill stand is 30mm to the right, the whole mill stand needs to be adjusted 30mm to the left, and the position 30mm to the left on the unloading buttress 4 is marked for observing the adjustment condition of the mill position during subsequent adjustment.
And an adjusting step S3, jacking the rolling stand, and then lowering and adjusting the rolling stand according to the marked position of the rolling stand needing to be adjusted.
Specifically, referring to fig. 6 and 7, the roll stand is lifted up by the carrier 6, and after the lifting up, the roll stand is adjusted to be horizontal. More specifically, referring to fig. 8, the rolling stand is jacked up by a hydraulic system of the transport vehicle 6, after the rolling stand is jacked up to the highest point, measuring points 9 at four corners of the rolling stand are measured by using a level gauge, and the rolling stand is adjusted by the hydraulic system to be ensured to be in a horizontal state.
According to the position 8 of the marked rolling stand which needs to be adjusted, one side of the rolling stand is firstly lowered by using a hydraulic system of the transport vehicle 6, then the other side of the rolling stand is lowered, and the lowering process is repeated until the position of the rolling stand on the unloading buttress 4 is coincided with the position 8 of the rolling stand which needs to be adjusted.
Specifically, referring to fig. 9, the transport vehicle 6 is dropped in an unbalanced fall-back manner, first lowering the first side of the mill housing, then lowering the second side of the mill housing, then lowering the first side of the mill housing, then lowering the second side of the mill housing \8230 \, where the operator observes the positions of the mill housing and the mark, and by repeating the above operations, the mill housing is wholly shifted in position and dropped back.
Preferably, the side of the rolling stand that is first lowered is the side opposite to the direction of the offset. Specifically, if the positive-side rack is preferentially dropped, the rack is slightly displaced in the first-tilt direction when tilted. For example, if the mill stand needs to be adjusted 30mm to the left overall, the left side of the mill stand will be the preferred drop.
Preferably, the roll stands are lowered each time by an equal distance.
During concrete implementation, the inclination angle of the rack needs to be controlled by paying attention to the falling in an unbalanced fall-back mode, and when the angle is too large, the negative value side needs to fall back by a certain height to keep the rack stable.
And a retest step S4, testing whether the deviation between the central line of the rolling mill stand and the unloading central line meets the unloading requirement, and if so, finishing the adjustment.
Specifically, referring to fig. 10 to 12, the total station is used to measure the actual distance between the auxiliary center line 2 and the reference point 7 again, calculate the deviation value between the measured actual distance and the theoretical distance, and determine whether the deviation between the mill stand center line 3 and the unloading center line 1 meets the unloading requirement according to the calculated deviation value, if so, the adjustment is completed.
If the deviation between the central line 3 of the rolling stand and the unloading central line 1 does not accord with the unloading requirement, the adjusting step S3 and the retesting step S4 are repeated until the deviation between the central line 3 of the rolling stand and the unloading central line 1 accords with the unloading requirement, and the adjustment is stopped.
It can be seen that, in this embodiment, according to the deviation condition of the central line of the rolling stand and the preset unloading central line, the position of the rolling stand to be adjusted is marked on the unloading buttress, and then the jacked stand is adjusted while being placed under the unloading buttress until the position of the rolling stand on the unloading buttress is matched with the position of the rolling stand to be adjusted, whether the deviation between the central line of the rolling stand and the unloading central line meets the unloading requirement is retested, if the deviation is combined, the adjustment is completed, so that the deviation between the central line of the rolling stand and the unloading central line can be effectively ensured to meet the unloading requirement, the position of the unloading of the rolling stand is ensured to be accurate, the operation is simple, the adjustment efficiency is improved, a large crane is not needed, the cost is saved, the problem that the deviation between the central line of the rolling stand and the unloading central line after the rolling stand falls on the unloading buttress in the prior art cannot meet the unloading requirement is solved, and the problem that the position of the rolling stand after unloading cannot be adjusted because the position is not correct can be solved. The method utilizes a hydraulic system of a transport vehicle to complete the adjustment of the central line offset after the unloading of the rolling mill stand in an unbalanced unloading mode, and can complete the adjustment of the central line offset of the unloading of the super-large rolling mill stand without additional hoisting equipment.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A method for adjusting the offset of a central line of unloading of a rolling mill stand is characterized by comprising the following steps:
testing, namely testing the deviation condition of the central line of the rolling mill frame and a preset unloading central line;
marking, namely marking the position of the rolling stand to be adjusted on an unloading buttress at the bottom of the rolling stand according to the deviation condition;
adjusting, namely jacking up the rolling mill stand, and then lowering and adjusting the rolling mill stand according to the marked position of the rolling mill stand needing to be adjusted;
and retesting, namely testing whether the deviation between the central line of the rolling mill stand and the unloading central line meets the unloading requirement, and if so, finishing the adjustment.
2. The method of adjusting mill stand unloading centerline offset of claim 1, wherein said testing step further comprises:
a selecting sub-step of selecting a reference point on the top surface of the rolling stand;
a setting substep, setting an auxiliary central line at a first preset distance from the unloading central line, wherein the auxiliary central line is parallel to the unloading central line;
a measuring sub-step of measuring the actual distance between the secondary centreline and the reference point;
and a calculating substep of calculating a deviation value between the measured actual distance and the theoretical distance and determining a deviation direction of the center line of the rolling stand.
3. The method of adjusting a mill stand unloading centerline offset of claim 2, wherein in the substep of selecting,
and the datum point is arranged on the top surface of the rack and at a second preset distance from the side machining surface of the rolling stand, and corresponds to the part of the rolling stand hoisting clamp.
4. The method of adjusting a mill stand unloading centerline offset of claim 2, wherein in said substep of calculating,
the theoretical distance is the sum of the second preset distance and the design distance between the lateral machining surface of the rolling stand and the auxiliary center line.
5. The method of adjusting mill stand unloading centerline offset of claim 2, wherein in said marking step,
and marking the position of the rolling stand to be adjusted on the unloading buttress according to the calculated deviation value and the determined deviation direction, wherein the position of the rolling stand to be adjusted is the position deviating from the deviation value in the direction opposite to the deviation direction.
6. The method of adjusting mill stand unloading centerline offset of claim 5, wherein in said adjusting step,
and jacking the rolling stand by using a transport vehicle, and adjusting the rolling stand to be in a horizontal state after jacking.
7. The method of adjusting mill stand unloading centerline offset of claim 6, wherein in said adjusting step,
and according to the marked position of the rolling stand needing to be adjusted, firstly descending one side of the rolling stand by using a hydraulic system of the transport vehicle, then descending the other side of the rolling stand, and repeating the descending process until the position of the rolling stand on the unloading buttress is coincided with the position of the rolling stand needing to be adjusted.
8. The method of adjusting a center line offset of a roll stand unloading according to claim 7, wherein a side where the roll stand is first lowered is a side opposite to the offset direction.
9. The method of adjusting offset of a center line of a roll stand unloading according to claim 7, wherein the distance of each descent of the roll stand is equal.
10. The method of adjusting mill stand unloading centerline offset of claim 1, wherein in the retesting step,
if the deviation between the central line of the rolling stand and the unloading central line does not accord with the unloading requirement, repeating the adjusting step and the retesting step until the deviation between the central line of the rolling stand and the unloading central line accords with the unloading requirement, and stopping adjusting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211184557.6A CN115647061A (en) | 2022-09-27 | 2022-09-27 | Method for adjusting center line offset of unloading of rolling mill stand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211184557.6A CN115647061A (en) | 2022-09-27 | 2022-09-27 | Method for adjusting center line offset of unloading of rolling mill stand |
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| Publication Number | Publication Date |
|---|---|
| CN115647061A true CN115647061A (en) | 2023-01-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211184557.6A Pending CN115647061A (en) | 2022-09-27 | 2022-09-27 | Method for adjusting center line offset of unloading of rolling mill stand |
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| CN (1) | CN115647061A (en) |
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- 2022-09-27 CN CN202211184557.6A patent/CN115647061A/en active Pending
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