CN114789242A - Online adjusting method for trunnion of bending section of continuous casting machine - Google Patents
Online adjusting method for trunnion of bending section of continuous casting machine Download PDFInfo
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- CN114789242A CN114789242A CN202110097140.5A CN202110097140A CN114789242A CN 114789242 A CN114789242 A CN 114789242A CN 202110097140 A CN202110097140 A CN 202110097140A CN 114789242 A CN114789242 A CN 114789242A
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- 238000005452 bending Methods 0.000 title claims abstract description 67
- 238000009749 continuous casting Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000004364 calculation method Methods 0.000 claims description 17
- 238000005266 casting Methods 0.000 description 2
- 238000009795 derivation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004422 calculation algorithm Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/168—Controlling or regulating processes or operations for adjusting the mould size or mould taper
Abstract
The invention discloses an online adjusting method for a trunnion of a bending section of a continuous casting machine, which comprises the following steps: a. acquiring the center distance R1 between an upper trunnion and a lower trunnion of a bending section of the continuous casting machine, the center distance R2 between the upper trunnion and the last roller on the outer arc side of the bending section, and the center distance R3 between the upper trunnion and the first roller on the outer arc side of the bending section; the radian measured value L of the arc connection between the last roller at the outer arc side of the bending section and the first sector section Actually lower The radian measured value L of the arc connection between the first roller at the outer arc side of the bending section and the crystallizer In fact Radian required target value L Eyes of a user (ii) a b. According to L Actually lower And L Eyes of a user Calculating L2; c. calculating L1 according to R1, R2 and L2; d. calculating L3 according to R1, R3 and L1; e. according to L In fact And L3 calculate L On meter (ii) a f. Comparison L Is counted up Whether or not at L Eyes of a user Within the precision range of (3), if the value of L1 is successful, taking L1 as the actual field adjustment value of the lower trunnion to correspondingly adjust the lower trunnion; if not, repeating the steps b-f. By the method, arc alignment precision can be adjustedFast, accurate, convenient and reliable.
Description
Technical Field
The invention relates to a continuous casting machine, in particular to an online adjusting method for a trunnion of a bending section of the continuous casting machine.
Background
In the operation process of the continuous casting machine, arc contact exceeding (standard is generally set as +/-0.5 mm of basic radian) often occurs between the bending section and the No. 1 sector section, and arc contact precision of the continuous casting machine is ensured by adjusting the moving amount of the upper trunnion and the lower trunnion of the bending section (usually, only the lower trunnion is adjusted).
At present, when the moving amount of a trunnion at a bending section is adjusted, multiple irregular rough adjustment is carried out by depending on related experience of equipment personnel, and arc welding precision can be adjusted to be within a precision range after long shutdown time. The method has long adjustment time, is not accurate enough and has high error degree.
Disclosure of Invention
In order to solve the above problems in the prior art, the invention provides an online adjusting method for a trunnion of a bending section of a continuous casting machine, which can quickly and accurately obtain the adjustment movement amount of a lower trunnion so as to ensure the arc connecting precision of the bending section and the fan-shaped section and the arc connecting precision of the bending section and a crystallizer.
The invention discloses an online adjusting method for trunnions at the bending section of a continuous casting machine, which comprises the following steps:
a. obtaining the center distance R1 of an upper trunnion and a lower trunnion of a bending section of the continuous casting machine, the center distance R2 of the upper trunnion and the last roller on the outer arc side of the bending section, and the center distance R3 of the upper trunnion and the first roller on the outer arc side of the bending section; the radian measured value L of the arc connection between the last roller at the outer arc side of the bending section and the first sector section In fact The radian measured value L of the arc connection between the first roller at the outer arc side of the bending section and the crystallizer In fact Radian required target value L Eyes of a person ；
b. According to L Actually lower And L Eyes of a user Calculating the central movement L2 needed by the last roller at the outer arc side of the bending section;
c. calculating the central movement L1 required by the lower trunnion according to R1, R2 and L2;
d. calculating the central movement L3 required by the first roller on the outer arc side of the bending section according to R1, R3 and L1;
e. according to L In fact And L3, calculating the arc value L of the arc-contacting between the first roller at the outer arc side of the bending section and the crystallizer On meter ；
f. Comparison L Is counted up Whether or not at L Eyes of a user If the accuracy is within the accuracy range, the value of L1 is successfully taken, and L1 is used as the actual on-site adjustment value of the lower trunnion to correspondingly adjust the lower trunnion; and if the value is not in the precision range, repeating the steps b to f until the value of the L1 is successfully taken.
In step b, the calculation formula of the central movement amount L2 required by the last roller on the outer arc side of the bending section is as follows:
if L is Actually lower Greater than L Eyes of a person ，L2＝L Actually lower -L Eyes of a person (ii) a If L is In fact Less than L Eyes of a user Then L2 is equal to L Eyes of a person -L Actually lower 。
In step c, the calculation formula of the central movement L1 required by the trunnion under the bending section is as follows:
L1＝R1*L2/R2。
in step d, the calculation formula of the central movement amount L3 required by the first roller on the outer arc side of the bending section is as follows:
L3＝R3*L1/R1。
in step e, the arc value L of the arc connection between the first roller on the outer arc side of the bending section and the crystallizer Is counted up The calculation formula of (2) is as follows:
if L is Actually lower Greater than L Eyes of a user ，L Is counted up ＝L In fact + L3; if L is In fact Less than L Eyes of a user Then L is On meter ＝L In fact -L3。
The value of L1 takes one digit after the decimal point.
By adopting the method for adjusting the trunnion at the bending section of the continuous casting machine on line, the adjustment movement amount required by the lower trunnion can be quickly and accurately obtained and adjusted so as to ensure the arc connection precision of the bending section and the fan-shaped section and the arc connection precision of the bending section and the crystallizer.
Drawings
FIG. 1 is an assembled structural view of an outer arc side frame of a bending section of a continuous casting machine of the present invention;
FIG. 2 is a schematic diagram of a derivation of the adjustment method of the present invention;
FIG. 3 is another schematic diagram of the adjustment method of the present invention.
Detailed Description
The method for adjusting the trunnion of the bending section of the continuous casting machine on line is further described with reference to the attached drawings and embodiments.
Firstly, the design principle of the on-line adjusting method for the trunnions of the bending section of the continuous casting machine is explained as follows:
as shown in fig. 1 to 3, the following parameters are fixed for each continuous casting machine (although the parameters of different continuous casting machines are different, the following parameters 1 to 3 and 8 to 9 are fixed for the same continuous casting machine, and are not changed by other data changes once the curve segment is put into use). Description of positional relationship: the upper part of the first roller 4 of the bending section is connected with the crystallizer, and the lower part of the last roller 3 of the bending section is connected with the first fan-shaped section.
1. The central distance between the upper trunnion 1 and the lower trunnion 2 is defined as a radius R1, the numerical value is fixed as long as the outer arc side frame of the bending section is manufactured, and the precision of the numerical value is completely guaranteed by the machining precision of a machine tool;
2. the distance between the upper trunnion 1 and the last roller 3 on the outer arc side of the curved segment, defined as the "radius R2" — this value is fixed as long as the curved segment is brought online;
3. the distance between the upper trunnion 1 and the first roller 4 on the outer arc side of the curved segment, defined as the "radius R3" — this value is fixed as long as the curved segment is brought online;
4. the amount of central movement required for lowering the trunnion 2, defined herein as the "chord length L1" — which is an actual on-site adjustment value that varies according to the size change required on site;
5. when the lower trunnion 2 moves, the angle between R1 and the displaced R1 (the angle between R2 and the displaced R2, and the angle between R3 and the displaced R3) is defined as "angle a 1" which changes with the amount of movement of the center of the lower trunnion 2.
6. The amount of central movement required for the last roller 3 on the outer arc side of the curved section is defined herein as the "chord length L2" -which varies with the amount of movement of the center of the lower trunnion 2.
7. The amount of movement of the center required for the first roller 4 on the outer arc side of the curved section is defined herein as "chord length L3" -which varies with the amount of movement of the center of the lower trunnion 2.
8. The distance of the lower trunnion 2 from the centre of the last roller 3 on the outer arc side of the curved segment, defined herein as the "radius R4" -which is fixed as long as the curved segment is brought on-line for use;
9. the distance between the centers of the first roller 4 on the outer arc side and the last roller 3 on the outer arc side of the curved segment, defined herein as the "radius R5" — this value is fixed as long as the curved segment is put on line;
10. the actually measured radian of the arc connection between the last roller at the outer arc side of the bending section and the first sector section is defined as L Actually lower ；
11. The measured radian value of the arc connection between the first roller at the outer arc side of the bending section and the crystallizer is defined as L In fact ；
12. The radian-required target value (range) required for the casting machine is defined as L Eyes of a user ；
13. The calculated arc value of the arc connection between the first roller at the outer arc side of the bending section and the crystallizer is defined as L Is counted up ；
The specific calculation derivation is as follows:
once the curved segment is put into use, the four distances R1, R3, R4 and R5 are fixed and form a stable virtual quadrangle, as shown in fig. 2.
Assuming that the chord length L1 produced by the lower trunnion is adjusted on site, the adjustment is only to adjust the lower trunnion, and the upper trunnion is maintained in a stationary posture, i.e., the center of the upper trunnion is not moved.
Since the lower trunnion generates L1, the virtual quadrangle made of R1, R3, R4, and R5 generates an overall amount of movement at random (the bold black in fig. 2 and 3 represents the quadrangle after the movement occurs), and therefore, a moving amount chord length L2 of the last roller on the outer arc side of the curved section, a moving amount chord length L3 of the first roller on the outer arc side of the curved section, and an angle a1 formed by R1 and the displaced R1 are generated (the same angle between R2 and the displaced R2, and the same angle between R3 and the displaced R3 are a 1).
With the known quantities R1, R2, R3 and assuming that L1 is known, the functional relationships of a1, L2, L3 with R1, R2, R3 and L1, respectively, can be derived by using the relevant knowledge of sine function, isosceles triangle, etc., and the calculation formula is as follows:
a1＝2arcsin﹝L1/(2*R1)﹞
L2＝2*R2*sin(a1/2)
L3＝2*R3*sin(a1/2)
substituting a1 into the calculation formulas of L2, L3 as a whole yields the following formula:
L2＝2*R2*sin﹛arcsin﹝L1/(2*R1)﹞﹜
L3＝2*R3*sin﹛arcsin﹝L1/(2*R1)﹞﹜
however, what we finally need is the actual value of L1 that can guide field adjustment, so the above-mentioned calculation formula of L2 is inversely calculated to obtain the calculation formula of L1:
L1＝R1*L2/R2
similarly, the formula of L1 can be obtained by back-calculating the formula of L3:
L1＝R1*L3/R3
the above formula is changed to obtain the calculation formula of L3:
L3＝L1*R3/R1
the value of L2 represents the moving distance of the last roller of the curve segment, and thus the difference between the measured arc value of the last roller on the outer arc side of the curve segment and the arc value of the first segment and the target arc value, and is calculated as follows:
L2＝L actually lower -L Eyes of a person (if L is In fact Less than L Eyes of a user Then the formula is L2 ═ L Eyes of a person -L Actually lower )
L Actually lower The value of (A) is a value obtained by actual measurement in the field, L Eyes of a user The value of (b) is a value within a relatively fixed range according to the accuracy requirement of the host, so that L2 can be directly and accurately calculated.
The value L3 represents the moving amount of the first roller in the curved section, and thus the radian change of the first roller on the outer arc side of the curved section and the crystallizer, so that the calculated radian value L of the arc connection between the first roller on the outer arc side of the curved section and the crystallizer Is counted up The calculation formula is as follows:
L on meter ＝L In fact + L3 (if L In fact Less than L Eyes of a user Then the formula is L Is counted up ＝L In fact -L3)
Based on the principle, the online adjusting method for the trunnions of the bending section of the continuous casting machine comprises the following steps:
a. obtaining the center distance R1 of an upper trunnion and a lower trunnion of a bending section of the continuous casting machine, the center distance R2 of the upper trunnion and the last roller on the outer arc side of the bending section, and the center distance R3 of the upper trunnion and the first roller on the outer arc side of the bending section; the radian measured value L of the arc connection between the last roller at the outer arc side of the bending section and the first sector section In fact The radian measured value L of the arc connection between the first roller at the outer arc side of the bending section and the crystallizer In fact Required target radian value L Eyes of a person ；
b. According to L Actually lower And L Eyes of a user Calculating the central movement L2 required by the last roller on the outer arc side of the bending section by the following calculation formula: if L is In fact Greater than L Eyes of a user ，L2＝L Actually lower -L Eyes of a user (ii) a If L is Actually lower Less than L Eyes of a person If L2 is equal to L Eyes of a person -L In fact ；
c. Calculating the central movement L1 required by the lower trunnion according to the formula L1 ═ R1 ═ L2/R2 according to R1, R2 and L2, wherein the value of the L1 is one bit after the decimal point;
d. according to R1, R3 and L1, calculating the central movement L3 required by the first roller on the outer arc side of the bending section through a formula L3-R3-L1/R1;
e. according to L In fact And L3, calculating the arc value L of the arc connection between the first roller at the outer arc side of the bending section and the crystallizer Is counted up The arc value L of the arc connection between the first roller at the outer arc side of the bending section and the crystallizer Is counted up The calculation formula of (c) is: if L is In fact Greater than L Eyes of a person ，L Is counted up ＝L In fact + L3; if L is In fact Less than L Eyes of a user Then L is Is counted up ＝L In fact -L3；
f. Comparison L On meter Whether or not at L Eyes of a user If the accuracy is in the accuracy range, the L1 value is successfully taken, and the L1 is taken as the field actual of the lower trunnionCorrespondingly adjusting the lower trunnion according to the actual adjustment value; and if the position is not in the precision range, repeating the steps b to f until the L1 value is successfully taken and carrying out on-site actual adjustment of the lower trunnion.
Specific examples of the invention are given in the following table
(standard radian requires 1mm +/-0.5, target precision 1.3mm, and range 0.7-1.3mm is acceptable)
The verification implementation in the trunnion adjustment of a plurality of continuous casting machines in a certain large steel mill in China shows that the method can save time and improve the adjustment precision.
In conclusion, the method starts from solving the actual problems in the on-site trunnion adjustment, models the problems by researching the structural relationship of the mechanical equipment structure, establishes the corresponding models, changes the empirical data into scientific data through a scientific algorithm, and has strong reference significance for the adjustment of other casting machines.
However, those skilled in the art should realize that the above embodiments are illustrative only and not limiting to the present invention, and that changes and modifications to the above described embodiments are intended to fall within the scope of the appended claims, provided they fall within the true spirit of the present invention.
Claims (6)
1. The on-line adjusting method for the trunnions of the bending section of the continuous casting machine is characterized by comprising the following steps of:
a. acquiring the center distance R1 between an upper trunnion and a lower trunnion of a bending section of the continuous casting machine, the center distance R2 between the upper trunnion and the last roller on the outer arc side of the bending section, and the center distance R3 between the upper trunnion and the first roller on the outer arc side of the bending section; the radian measured value L of the arc connection between the last roller at the outer arc side of the bending section and the first sector section Actually lower And the radian measured value L of the arc connection between the first roller at the outer arc side of the bending section and the crystallizer In fact Required target radian value L Eyes of a user ；
b. According to L In fact And L Eyes of a user Calculating the central movement L2 required by the last roller on the outer arc side of the bending section;
c. calculating the central movement L1 required by the lower trunnion according to R1, R2 and L2;
d. calculating the central movement L3 required by the first roller on the outer arc side of the bending section according to R1, R3 and L1;
e. according to L In fact And L3, calculating the arc value L of the arc connection between the first roller at the outer arc side of the bending section and the crystallizer On meter ；
f. Comparison L Is counted up Whether or not at L Eyes of a person If the accuracy range is within the accuracy range, the value of L1 is successfully taken, and L1 is used as a field actual adjustment value of the lower trunnion to correspondingly adjust the lower trunnion; and if the value is not in the precision range, repeating the steps b to f until the value of the L1 is successfully taken.
2. The method for adjusting the trunnion of the bending section of the continuous casting machine on line according to claim 1, characterized by comprising the following steps: in step b, the calculation formula of the central movement amount L2 required by the last roller on the outer arc side of the bending section is as follows:
if L is In fact Greater than L Eyes of a user ，L2＝L Actually lower -L Eyes of a user (ii) a If L is In fact Less than L Eyes of a user Then L2 is equal to L Eyes of a person -L Actually lower 。
3. The method for adjusting the trunnion of the bending section of the continuous casting machine on line according to claim 1, characterized by comprising the following steps: in step c, the calculation formula of the central movement L1 required by the trunnion under the bending section is as follows:
L1＝R1*L2/R2。
4. the method for adjusting the trunnion of the bending section of the continuous casting machine on line according to claim 1, characterized by comprising the following steps: in step d, the calculation formula of the central movement amount L3 required by the first roller on the outer arc side of the curved section is:
L3＝R3*L1/R1。
5. the method for on-line adjustment of the trunnion of the bending section of the continuous casting machine according to claim 1, characterized in that: in step e, the arc value L of the arc connection between the first roller on the outer arc side of the bending section and the crystallizer Is counted up The calculation formula of (c) is:
if L is Actually lower Greater than L Eyes of a user ，L Is counted up ＝L In fact + L3; if L is In fact Less than L Eyes of a person Then L is On meter ＝L In fact -L3。
6. The method for on-line adjustment of the trunnion of the bending section of the continuous casting machine according to claim 1, 3 or 4, characterized in that: the value of L1 takes one digit after the decimal point.
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Cited By (1)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117066467A (en) * | 2023-10-17 | 2023-11-17 | 唐山市方通冶金设备制造有限公司 | Device and method for correcting radius of roller way of bending section of continuous casting machine |
| CN117066467B (en) * | 2023-10-17 | 2023-12-19 | 唐山市方通冶金设备制造有限公司 | Device and method for correcting radius of roller way of bending section of continuous casting machine |
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