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EP2085157B1 - Procédé et appareil d'ajustement des positions de roulement des rouleaux constituant un laminoir continu à trois rouleaux - Google Patents

Procédé et appareil d'ajustement des positions de roulement des rouleaux constituant un laminoir continu à trois rouleaux Download PDF

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Publication number
EP2085157B1
EP2085157B1 EP09006388A EP09006388A EP2085157B1 EP 2085157 B1 EP2085157 B1 EP 2085157B1 EP 09006388 A EP09006388 A EP 09006388A EP 09006388 A EP09006388 A EP 09006388A EP 2085157 B1 EP2085157 B1 EP 2085157B1
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Prior art keywords
rolling
wall thickness
rolled material
roll
measured
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EP09006388A
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German (de)
English (en)
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EP2085157A1 (fr
Inventor
Akihito Yamane
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Nippon Steel Corp
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Sumitomo Metal Industries Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
    • B21B17/02—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel, i.e. the mandrel rod contacts the rolled tube over the rod length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/78—Control of tube rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
    • B21B17/02—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel, i.e. the mandrel rod contacts the rolled tube over the rod length
    • B21B17/04—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel, i.e. the mandrel rod contacts the rolled tube over the rod length in a continuous process
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B38/04—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring thickness, width, diameter or other transverse dimensions of the product

Definitions

  • the present invention relates to a method and an apparatus for properly adjusting rolling positions of rolling rolls constituting a three-roll mandrel mill in the mandrel mill used to produce the seamless tubes and pipes.
  • tubes In the production of the seamless tubes and pipes (hereinafter, referred to as tubes) by a Mannesmann-mandrel mill method, firstly, a round billet or a square billet which is of a raw material is heated in a range of 1200 to 1260 °C with a rotary hearth type heating furnace, and then a piercer pierces and rolls the round billet or the square billet to produce a hollow shell by using a plug and rolling rolls.
  • a mandrel bar is inserted into the bore of the hollow shell in a skewered manner, usually the hollow shell is elongated by the mandrel mill comprising five to eight stands while an outer surface of the hollow shell is constrained by the caliber rolling rolls, and thereby the hollow shell is reduced to a predetermined wall thickness. Then, after the mandrel bar is extracted, the tube material whose wall thickness is reduced is subjected to a sizing process, whereby the tube material is formed and rolled in a predetermined outer diameter to obtain a product by a reducer mill.
  • a two-roll mandrel mill is often used as the mandrel mill.
  • a pair of caliber rolling rolls facing each other is arranged in each stand, and the rolling rolls are arranged so that the reduction orientation of the rolling rolls is alternately disposed out of phase by 90° between adjacent stands.
  • a four-roll mandrel mill in which the four caliber rolling rolls are arranged in each stand so that an angle formed by the reduction directions is 90°.
  • a three-roll mandrel mill is also proposed.
  • the three caliber rolling rolls are arranged in each stand so that the angle formed by the reduction directions is 120°, and the rolling rolls are arranged while the rolling positions of the rolling rolls are alternately out of phase by 60° between the adjacent stands.
  • the two-roll mandrel mill there is used a rolling position control method, in which the flange portions of the caliber rolling rolls facing each other are brought intro contact with each other once and the rolling position of each rolling roll is set at a zero point at this point (for example, see Japanese Patent Application Publication No. 9-174118 ).
  • the zero point cannot correctly be adjusted by the method used in the two roll mandrel mill. Therefore, there is a problem that the rolling position of each rolling roll cannot be controlled at a proper position.
  • a wall thickness measuring device with a radiation beam is arranged on an exit side of the mandrel mill, the wall thickness (added value with the wall thicknesses at the opposite portions in the rolled material through which the radiation beam passes) of the rolled material is measured by the wall thickness measuring device, and the rolling position of the rolling roll is adjusted based on the measurement value (for example, see Japanese Patent Application Publication No. 8-71616 ).
  • Fig. 1 is a view explaining an arrangement relationship of the rolling rolls in the three-roll mandrel mill. As shown in Fig.
  • the portion of the rolled material opposite from the position corresponding to a groove bottom portion of each rolling roll becomes the position corresponding to the flange portion of another rolling roll, and generally the wall thickness of the rolled material tends to be easily influenced at the position corresponding to the flange portion depending on the rolling conditions. Therefore, it is difficult to estimate the relationship between the wall thickness and the rolling position of the rolling roll. Accordingly, it is difficult to adjust the rolling position of the rolling roll based on the measurement value, even if the added value with the wall thicknesses at the opposite portions of the rolled material through which the radiation beam passes is measured by the radiation wall thickness measuring device described in Japanese Patent Application Publication No.
  • JP 2001-293503 discloses a method and apparatus in accordance with the precharacterising sections of claims 1 and 2 respectively.
  • a multi-beam radiation measurement method disclosed in " IRON AND STEEL" (1970 No. 9, pp 1139-1145 ) may be applied in order to measure the wall thickness of the rolled material at the position corresponding to the groove bottom portion of each rolling roll.
  • the radiation beams are arranged so as to intersect one another at the position (the middle of the wall thickness at the position corresponding to the groove bottom portion) corresponding to the groove bottom portion of each rolling roll of the rolled material.
  • a misalignment generates between a center position of the rolled material (the alignment center of the rolled material) and a gravity center position got with each position (the radiation beam intersecting position in the case that the multi-beam radiation method is adopted) where the wall thickness of the rolled material is measured.
  • Fig. 2 is a view explaining an apparent wall thickness eccentricity which generates when the center position of the rolled material deviates. When the misalignment generates, sometimes the apparent generation of the wall thickness eccentricity is observed even if the wall thickness eccentricity does not actually generate in the rolled material.
  • Fig. 3 is a view illustrating rolling rolls in the three-roll mandrel mill that are made to adjust a zero-point.
  • the zero-point adjustment is performed in a state that the flange portions of rolling rolls R1, R2 are in contact with each other and at the position where the flange portions of the rolling rolls R1, R3 are in contact with each other in the three rolling rolls R1, R2, R3 (the rolling position of each rolling roll is moved only by the equal distance from the zero-point position in rolling the rolled material), sometimes the wall thickness of the rolled material is measured as the substantially same value at the position corresponding to the groove bottom portion of each rolling roll. Therefore, the rolling position of each rolling roll is assumed to be proper.
  • the wall thickness of the rolled material is measured as the substantially same value at the position corresponding to the groove bottom portion of each rolling roll, in the case shown in Fig. 3 , the wall thickness of the rolled material at the position corresponding to the portion extended toward the flange portion side from the groove bottom portion of each rolling roll is different from the wall thickness at the position corresponding to groove bottom portion of each rolling roll. The difference results in the generation of the wall thickness eccentricity in the rolled material.
  • the present inventor completes the present invention by finding the fact that the rolling position of each rolling roll can properly be adjusted while the wall thickness accuracy of the rolled material is secured and the wall thickness eccentricity is suppressed, when the wall thicknesses of the rolled material are measured at the positions which are extended toward both flange portion sides from the groove bottom portion of each rolling roll respectively, and when the rolling position of each rolling roll is adjusted based on the measurement values.
  • the present invention provides a method of adjusting the rolling positions of the rolling rolls constituting a three-roll mandrel mill, the method characterized by including a step of measuring a wall thickness of a rolled material at a position corresponding to a portion extended toward one flange portion side from a groove bottom portion of each rolling roll while the wall thickness of the rolled material is measured at a position corresponding to a portion extended toward the other flange portion side; a step of computing a deviation between the measured wall thickness at the position corresponding to the portion extended toward one flange portion side and the measured wall thickness at the position corresponding to the portion extended toward the other flange portion side; and a step of adjusting the rolling position of each rolling roll based on each computed deviation.
  • the wall thickness of the rolled material is measured at a position corresponding to the portion extended-toward one flange portion side from the groove bottom portion of each rolling roll while the wall thickness of the rolled material is measured at the position corresponding to the portion extended toward the other flange portion side, and the rolling position of each rolling roll is adjusted based on the deviation between the measurement values. Accordingly even if the rolling position of each rolling roll is considered to be apparently proper since the wall thickness of the rolled material is measured as the substantially same value at the position corresponding to the groove bottom portion of each rolling roll, the rolling position can be adjusted at the actually proper position.
  • the present invention also provides an apparatus which adjusts rolling positions of the rolling rolls constituting a three roll mandrel mill, the apparatus characterized by including a wall thickness measuring device which is provided with a plurality of the radiation sources and a plurality of the detectors, the plurality of the detectors being arranged while facing the radiation sources through a rolled material respectively, the wall thickness measuring device measuring a wall thickness of a rolled material at each position corresponding to a portion extended toward one flange portion side from a groove bottom portion of each rolling roll while measuring the wall thickness of the rolled material at a position corresponding to a portion extended toward the other flange portion side; anti a rolling position control device which computes a deviation between the measured wall thickness at the position corresponding to the portion extended toward one flange portion side and the measured wall thickness at the position corresponding to the portion extended toward the other flange portion side, the rolling position control device controlling each rolling drive device based on each computed deviation.
  • a wall thickness measuring device which is provided with a plurality of the radiation sources and
  • the wall thickness of the rolled material is measured at the position corresponding to the portion extended toward one flange portion side from the groove bottom portion of each rolling roll, the wall thickness of the rolled material is measured at the position corresponding to the portion extended toward the other flange portion side, and the rolling position of each rolling roll is adjusted based on each of the deviations of the both measured values. Therefore, the rolling position can be properly adjusted at the actually proper position, even if the rolling position of each rolling roll is considered to be apparently proper since the wall thickness of the rolled material is measured as the substantially same value at the position corresponding to the groove bottom portion of each rolling roll.
  • Fig. 4 is a view showing a schematic configuration of a rolling position adjustment device of the rolling rolls constituting a three-roll mandrel mill according to an example.
  • a rolling position adjustment device 100 is a rolling position adjustment device of the rolling rolls constituting the three-roll mandrel mill including six stands in total.
  • each of the three rolling rolls are arranged in each stand in order to stretch and roll the outer surface of a rolled material T while a mandrel bar B is inserted into the bore of the rolled material T.
  • the rolling position adjustment device 100 is configured to adjust the rolling positions of the rolling rolls R5 and R6 arranged in the last two stands (the fifth stand and the sixth stand) of the mandrel mill.
  • Fig. 4 shows that the two rolling rolls R5, R6 are arranged in each stand respectively for the sake of convenience, actually three rolling rolls R5, R6 are arranged while the angle formed by the reduction direction of each rolling roll is 120°.
  • the rolling position adjustment device 100 includes a wall thickness measuring device 1 and a rolling position control device 2.
  • the wall thickness measuring device 1 is arranged on the exit side of the mandrel mill, and the wall thickness measuring device 1 measures the wall thickness (hereinafter appropriately referred to as "groove bottom wall thickness") of the rolled material T at the position corresponding to the groove bottom portion of each of the rolling rolls R5, R6.
  • the rolling position control device 2 computes the deviation between each groove bottom wall thickness measured by the wall thickness measuring device 1 and the target wall thickness determined by the rolling schedule at the position corresponding to the groove bottom portion, and the rolling position control device 2 controls the rolling drive devices P5, P6 of the rolling rolls R5, R6 based on the computed deviations respectively
  • the rolling position adjustment device 100 includes a center position measuring device 3 which measures the center position of the rolled material T by measuring the outer diameter of the rolled material T from the directions substantially orthogonal to each other.
  • Fig. 5 is a view showing a schematic configuration of a wall thickness measuring device.
  • a wall thickness measuring device 1 includes a plurality of the radiation sources 11, 12, 13 and a plurality of the detectors 14, 15, 16.
  • the plurality of the detectors 14, 15, 16 are arranged while facing the plurality of the radiation sources 11, 12, 13 through the rolled material T, respectively
  • the wall thickness measuring device 1 is a so-called multi-beam radiation measuring device in which the radiation beams BE1, BE2, BE3 radiated from the radiation sources 11, 12, 13 are arranged so as to intersect each other at the position (the middle of wall thickness at the position corresponding to the groove bottom portion) corresponding to the groove bottom portion of each rolling roll of the rolled material T.
  • the groove bottom portions of the rolling rolls R5, R6 differ from one another in the position (out of phase by 60°), so that the wall thickness measuring device 1 is configured as shown in Fig. 5 .
  • the devices whose intersecting points of the radiation beams differ from each other are arranged in two stages along the axial direction of the rolled material T, the groove bottom wall thickness of the rolling roll R5 is measured at one stage, and the groove bottom wall thickness of the rolling roll R6 is measured at the other stage.
  • Fig. 6 is a view explaining a measuring point of a wall thickness measuring device. As shown in Fig.
  • the groove bottom wall thicknesses B1- B3 in the fifth stand are measured at one stage
  • the groove bottom wall thicknesses B4 - B6 in the sixth stand are measured at the other stage
  • the wall thickness measuring device 1 is configured to measure all the groove bottom wall thicknesses B1 - B6 as a whole. Since the specific wall thickness measurement method by the multi-beam radiation measuring device is in public domain, the detailed description of the wall thickness measurement method will be omitted.
  • the rolling position control device 2 computes the deviation between each of the groove bottom wall thicknesses B1 - B6 measured by the wall thickness measuring device 1 and the target wall thickness, determined by the rolling schedule, at the position corresponding to the groove bottom portion, and the rolling position control device 2 can control the rolling drive devices P5, P6 of the rolling rolls R5, R6 based on the measured deviation, respectively. More specifically, when the measured groove bottom wall thickness is smaller than the target wall thickness, the rolling drive device can be controlled so as to be moved toward the direction in which the relevant rolling roll is opened (the direction in which the relevant rolling roll recedes from the center of the rolled material T).
  • the rolling drive device can be controlled so as to be moved toward the direction in which the relevant rolling roll is closed (the direction in which the corresponding rolling roll is brought close to the center of the rolled material T).
  • a movement amount of each of the rolling rolls R5, R6 (the position correction amount)
  • the rolling position control device 2 includes the center position measuring device 3, the rolling position control device 2 can adopt the configuration in which the measured groove bottom wall thicknesses B1 - B6 are corrected based on the center position of the rolled material T measured by the center position measuring device 3.
  • Fig. 7 is a schematic configuration of a center position measuring device.
  • the center position measuring device 3 includes a bar-like light source (for example, the high-frequency fluorescent lamp) 31, a line sensor (for example, the CCD line sensor) 32, a bar-like light source 33, and a line sensor 43.
  • the bar-like light source 31 illuminates the rolled material T from one direction, and the line sensor 32 is arranged while facing the bar light source 31 through the rolled material T.
  • the bar-like light source 33 illuminates the rolled material T from the direction substantially orthogonal to the illumination direction of the bar-like light source 31, and the line sensor 34 is arranged while facing the bar-like light source 33 through the rolled material T.
  • the center position measuring device 3 is configured to measure the outer diameter of the rolled material T (the shadow length of the rolled material T) from the directions substantially orthogonal to each other.
  • the center position coordinate of the rolled material T is computed by a center position X of the outer diameter measured by the combination of the bar-like light source 31 and the line sensor 32 and by a center position Y of the outer diameter measured by the combination of the bar-like light source 33 and the line sensor 34.
  • the rolling position control device 2 computes the deviation between a center position (X,Y) measured by the center position measuring device 3 and the gravity center position of the intersecting point of the radiation beams from the plurality of the radiation sources 11, 12, 13 constituting the wall thickness measuring device 1.
  • Fig. 8 is a view showing an example of a relationship between the deviation amount of the center position of the rolled material and an amount of the apparent wall thickness eccentricity.
  • the correlation between the deviation and the measurement errors (the apparent wall thickness eccentricity amount) of the measured groove bottom wall thicknesses B1 - B6 is brought about by experiments or the like in advance.
  • the correlation shown in Fig. 8 is obtained.
  • a horizontal axis of Fig. 8 indicates a ratio of the deviation (the deviation amount of the center position of the rolled material to the rolled material radius, and a vertical axis indicates an apparent wall thickness eccentricity component expressed by the following formula (1).
  • the rolling position control device 2 corrects each of the measured groove bottom wall thicknesses B1 - B6 according to the following formula (2) based on the computed deviation (the apparent wall thickness eccentricity component).
  • WTk ⁇ WTk + 1 2 ⁇ Ecc 100 ⁇ cos ⁇ ⁇ k - arg ⁇ R + Ii
  • the rolling position control device 2 computes the deviation between the target wall thickness and each groove bottom wall thickness corrected according to the formula (2), and the rolling position control device 2 controls the rolling drive devices P5, P6 of the rolling rolls R5, R6 based on each computed deviation.
  • the rolling position control device 2 is configured to be able to adopt the configuration in which the measured groove bottom wall thicknesses B1- B6 are corrected based on the center position of the rolled material T measured by the center position measuring device 3.
  • the rolling position control device 2 has an advantage that the rolling position can be adjusted with higher accuracy by adopting the above configuration.
  • the wall thickness measuring device 1 is configured to measure only the groove bottom wall thicknesses B1 - B6.
  • the wall thickness measuring device 1 includes other plurality of the radiation sources and other plurality of the detectors which are arranged while facing the relevant radiation sources through the rolled material T, respectively, and the wall thickness of the rolled material T is measured at the position corresponding to the portion extended toward one flange portion side from the groove bottom portion of each of the rolling rolls R5, R6, while the wall thickness of the rolled material T is measured at the position corresponding to the portion extended toward the other flange portion side.
  • Fig. 9 is a view explaining the measuring point of a wall thickness measuring device according to an embodiment of the present invention. As shown in Fig.
  • the wall thicknesses B11, B12 of the rolled material T are also measured at the positions corresponding to the portions each extended toward the flange portion at both sides from the groove bottom portion in which the groove bottom wall thickness B1 is measured
  • the wall thicknesses B21, B22 of the rolled material T are also measured at the positions corresponding to the portions each extended toward the flange portion at both sides from the groove bottom portion in which the groove bottom wall thickness B2 is measured
  • the wall thicknesses B31, B32 of the rolled material T are also measured at the positions corresponding to the portions each extended toward the flange portion at both sides from the groove bottom portion in which the groove bottom wall thickness B3 is measured.
  • the wall thicknesses B41, B42 of the rolled material T are also measured at the positions corresponding to the portions each extended toward the flange portion at both sides from the groove bottom portion in which the groove bottom wall thickness B4 is measured, the wall thicknesses B51, B52 of the rolled material T are also measured at the positions corresponding to the portions each extended toward the flange portion at both sides from the groove bottom portion in which the groove bottom wall thickness B5 is measured, and the wall thicknesses B61, B62 of the rolled material T are also measured at the positions corresponding to the portions each extended toward the flange portion at both sides from the groove bottom portion in which the groove bottom wall thickness B6 is measured.
  • the rolling position control device 2 computes the deviation between the measured wall thickness (for example, the wall thickness B11) at the position corresponding to the portion extended toward one flange portion side and the measured wall thickness (for example, the wall thickness B12) at the position corresponding to the portion extended toward the other flange side, and the rolling position control device 2 can be configured to further control the rolling drive devices P5, P6 of the rolling roll R5 (R51, R52, R53), R6 based on each computed deviation.
  • the rolling drive device P5 can be controlled such that the rolling roll R52 adjacent to the measuring position of the larger side (the wall thickness B12) is moved in the direction in which the rolling roll R52 is opened (the direction in which the rolling roll R52 recedes from the center of the rolled material T), and the rolling drive device P can be controlled such that the remaining two rolling rolls R51, R53 are moved in the direction in which the rolling rolls R51, R53 are closed (the direction in which the rolling rolls R51 and R53 are brought close to the center of the rolled material T).
  • the deviations between B21 and B22, B31 and B32, B41 and B42, B51 and B52, as well as B61 and B62 are computed, respectively, and the rolling drive device of the corresponding rolling roll is similarly controlled according to the extent of the positive or negative (large or small) deviation. Rewarding the movement amount (the position correction amount) of each of the rolling rolls R5, R6, it is necessary to correct the position such that the deviation becomes zero.
  • the movement amount of the rolling roll is expressed by the following formula (3).
  • the groove bottom wall thicknesses B1 - B3, and B4 - B6 of the rolling rolls P5, P6 are measured as the substantially same value by adopting the above configuration, respectively, so that the rolling position can be re-adjusted at the actually proper position, even if the rolling positions of the rolling rolls P5, P6 are considered to be apparently proper.
  • Fig. 10 is a view showing a schematic configuration of a rolling position adjustment device of the rolling rolls constituting a three-roll mandrel mill according to the second embodiment of the present invention.
  • a rolling position adjustment device 100A of the rolling rolls constituting the three-roll mandrel mill according to the embodiment is a rolling position adjustment device constituting the three-roll mandrel mill including six stands in total.
  • three rolling rolls are respectively arranged in each stand in order to stretch and roll the outer surface of the rolled material T while the mandrel bar B is inserted into the bore of the rolled material T.
  • the rolling position adjustment device 100A is configured to adjust the rolling positions of the rolling rolls R5, R6 arranged in the last two stands (the fifth stand and the sixth stand) of the mandrel mill.
  • Fig. 10 shows that two rolling rolls R5, R6 are respectively arranged in each stand for the sake of convenience, actually the three rolling rolls R5, R6 are respectively arranged while the angle formed by the reduction directions is 120°.
  • the rolling position adjustment device 100A includes a wall thickness measuring device 1A and a rolling position control device 2A.
  • the wall thickness measuring device 1A is arranged on the exit side of the mandrel mill, and the rolling position control device 2A controls the rolling drive devices P5, P6 of the rolling rolls R5, R6 based on the measurement result of the wall thickness measuring device 1A, respectively.
  • Fig. 10 shows that each one of the rolling drive devices P5, P6 is arranged in each stand for the sake of convenience, actually the rolling drive device is arranged in each of the rolling rolls R5, R6 arranged in each stand.
  • the wall thickness measuring device 1A does not measure the groove bottom wall thickness of the rolled material T.
  • the wall thickness measuring device 1A includes the plurality of the radiation sources and the plurality of the detectors which are arranged while facing the radiation sources through the rolled material T, respectively, and the wall thickness measuring device 1A is configured to measure the wall thickness of the rolled material T at each position corresponding to the portion extended toward one flange portion side from the groove bottom portion of each of the rolling rolls R5, R6 and the portion extended toward the other flange portion side. Referring to Fig. 9 , the wall thickness measuring device 1A will be described.
  • the wall thickness measuring device 1A is configured not to measure groove bottom wall thicknesses B1, B2, B3, B4, B5, and B6, but to measure the wall thicknesses B11, B12, B21, B22, B31, B32, B41, B42, B51, B52, and B61, B62 of the rolled material T at each position corresponding to the portion extended toward the flange portion at both sides from the groove bottom portions of the rolling rolls.
  • the rolling position control device 2A is configured to compute the deviation between the measured wall thickness (for example, the wall thickness B11 shown in Fig. 9 ) at the position corresponding to the portion extended toward one flange portion side and the measured wall thickness (for example, the wall thickness B12 shown in Fig. 9 ) at the position corresponding to the portion extended toward the other flange portion side, and the rolling position control device 2A is configured to control the rolling drive devices P5, P6 of the rolling roll R5 (R51, R52, and R53), R6 based on the computed deviations.
  • the rolling drive device P5 can be controlled such that the rolling roll R52 adjacent to the measuring position of the larger side (the wall thickness B12) is moved toward the direction in which the rolling roll R52 is opened (the direction in which the rolling roll R52 recedes from the center of the rolled material T), and the draft device P can be controlled such that the remaining two rolling rolls R51, R53 are moved in the direction in which the rolling rolls R51, R53 are closed (the direction in which the rolling rolls R51, R53 are brought close to the center of the rolled material T).
  • the rolling drive device of the corresponding rolling roll is similarly controlled according to the extent of the positive or negative (large or small) deviation.
  • the movement amount (the position correction amount) of each of the rolling rolls R5, R6 it is necessary to correct the position such that the deviation becomes zero.
  • the movement amount of the rolling roll is expressed by the following formula (3).
  • the groove bottom wall thicknesses B1 - B3, and B4 - B6 of the rolling rolls P5, P6 are measured as the substantially same value by adopting the above configuration, respectively (this means that the substantially same value is obtained if the measurement is performed, since the groove bottom wall thicknesses B1 - B3, and B4 - B6 are not actually measured in the second embodiment), so that the rolling position can be re-adjusted at the actually proper position, even if the rolling positions of the rolling rolls P5, P6 are considered to be apparently proper.
  • the production test was performed by using the rolled material and the mandrel bar having the sizes shown in Table 1.
  • each of the 30 seamless steel tubes was rolled under the conditions described below.
  • Table 1 Mandrel mill hollow shell size Outer diameter of 205 mm ⁇ wall thickness of 15 mm Mandrel mill finishing size Outer diameter of 168 mm ⁇ wall thickness of 5 mm Mandrel bar diameter Outer diameter of 158 mm
  • the test was performed for the four conditions.
  • Example 1 the method in which the flange portions of the rolling rolls are brought into contact with each other, and the rolling position of each rolling roll is set at the zero point at that time to control the rolling position
  • Example 2 the method in which the groove bottom wall thickness measurement value is corrected by the center position deviation amount of the rolled material and the rolling position is adjusted based on the correction value
  • Example 3 the method in which, after the adjustment by Example 2, the rolling position is re-adjusted based on the deviation of the wall thickness measurement value on the flange portion side of the rolling roll
  • Example 4 the method of adjusting the rolling position based on the deviation of the wall thickness measurement value on the flange portion side of the rolling roll.
  • Table 2 shows the test result. As shown in Table 2, when compared with the conventional method, the average values of the wall thickness eccentricity ratio and the frequencies in which the wall thickness eccentricity ratio exceeds 5% are decreased from Example 1 to Example 4. This is largely attributed to the fact that the present invention enables the rolling positions of the rolling rolls constituting the three roll mandrel mill to be properly adjusted.
  • the wall thickness of the rolled material is measured at the position corresponding to the portion extended toward one flange portion side from the groove bottom portion of each rolling roll, the wall thickness of the rolled material is measured at the position corresponding to the portion extended toward the other flange portion side, and the rolling position of each rolling roll is adjusted based on the deviation of both measured values. Therefore, even if the rolling position of each rolling roll is considered to be apparently proper, actually the rolling position can properly be adjusted. Accordingly, the method and the apparatus of the present invention are widely adopted as means for adjusting the rolling positions of the rolling rolls constituting the three-roll mandrel mill.

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Claims (2)

  1. Procédé de réglage de positions de laminage des cylindres de laminage constituant un laminoir continu à trois cylindres, le procédé comportant les étapes consistant à :
    mesurer une épaisseur de paroi d'une matière laminée ; et
    régler la position de laminage de chaque cylindre de laminage ;
    caractérisé par :
    la mesure de l'épaisseur de paroi de la matière laminée à un emplacement correspondant à une partie (B11, B21, B31, B41, B51, B61) s'étendant vers un premier côté d'une partie formant bride depuis une partie formant fond de cannelure de chaque cylindre de laminage (R51, R52, R53), tandis que l'épaisseur de paroi de la matière laminée est mesurée à un emplacement (B12, B22, B32, B42, B52, B62) correspondant à une partie s'étendant vers l'autre côté de la partie formant bride ; et
    le calcul d'un écart entre ladite épaisseur de paroi mesurée à l'emplacement correspondant à la partie s'étendant vers un premier côté d'une partie formant bride et ladite épaisseur de paroi mesurée à l'emplacement correspondant à la partie s'étendant vers l'autre côté de la partie formant bride ; et
    le réglage de la position de laminage de chaque cylindre de laminage d'après ledit chaque écart calculé.
  2. Dispositif de réglage de la position de laminage des cylindres de laminage constituant un laminoir continu à trois cylindres, le dispositif comportant :
    un dispositif de mesure (1A) d'épaisseur de paroi ; et
    un dispositif de commande (2A) de position de laminage, commandant chaque dispositif d'entraînement de cylindre de laminage ;
    caractérisé en ce que le dispositif de mesure (1A) d'épaisseur de paroi est pourvu d'une pluralité de sources de rayonnement et d'une pluralité de détecteurs, ladite pluralité de détecteurs étant respectivement disposés en regard desdites sources de rayonnement, la matière laminée étant interposée, le dispositif de mesure d'épaisseur mesurant une épaisseur de paroi d'une matière laminée à un emplacement correspondant à une partie s'étendant vers un premier côté d'une partie formant bride depuis une partie formant fond de cannelure de chaque cylindre de laminage tout en mesurant l'épaisseur de paroi de la matière laminée à un emplacement correspondant à une partie s'étendant vers l'autre côté de la partie formant bride ; et
    le dispositif de commande (2A) de position de laminage est conçu pour calculer un écart entre ladite épaisseur de paroi mesurée à l'emplacement correspondant à la partie s'étendant vers un premier côté d'une partie formant bride et ladite épaisseur de paroi mesurée à l'emplacement correspondant à la partie s'étendant vers l'autre côté de la partie formant bride, le dispositif de commande de position de laminage commandant chaque dispositif d'entraînement de cylindre2 d'après ledit écart calculé.
EP09006388A 2003-10-07 2004-10-06 Procédé et appareil d'ajustement des positions de roulement des rouleaux constituant un laminoir continu à trois rouleaux Expired - Lifetime EP2085157B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003348795 2003-10-07
EP04792074A EP1676651B1 (fr) 2003-10-07 2004-10-06 Procede et dispositif pour ajuster l'emplacement de serrage d'un cylindre de laminage constituant un laminoir a mandrin a trois cylindres

Related Parent Applications (2)

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EP04792074A Division EP1676651B1 (fr) 2003-10-07 2004-10-06 Procede et dispositif pour ajuster l'emplacement de serrage d'un cylindre de laminage constituant un laminoir a mandrin a trois cylindres
EP04792074.9 Division 2004-10-06

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EP2085157A1 EP2085157A1 (fr) 2009-08-05
EP2085157B1 true EP2085157B1 (fr) 2012-04-18

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EP04792074A Expired - Lifetime EP1676651B1 (fr) 2003-10-07 2004-10-06 Procede et dispositif pour ajuster l'emplacement de serrage d'un cylindre de laminage constituant un laminoir a mandrin a trois cylindres

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007015484A1 (fr) * 2005-08-02 2007-02-08 Sumitomo Metal Industries, Ltd. Dispositif et procédé de détection de défaut de tube
EP2133159B1 (fr) * 2007-03-30 2013-01-23 Nippon Steel & Sumitomo Metal Corporation Procédé de fabrication de tuyaux sans soudure
EP2465618B1 (fr) * 2009-08-11 2016-04-13 Nippon Steel & Sumitomo Metal Corporation Dispositif pour régler la position d'une vis de serrage d'un cylindre de laminoir faisant partie d'un laminoir continu à trois cylindres, et procédé de fabrication d'un tuyau sans soudure
CN102873100B (zh) * 2011-07-13 2014-12-17 中冶东方工程技术有限公司 三辊全浮芯棒连轧管机及其轧制工艺
CN103801558B (zh) * 2014-01-27 2015-12-30 胜利油田康贝石油工程装备有限公司 石油用割缝管的梯型缝加工方法和设备
DE102014203422B3 (de) * 2014-02-26 2015-06-03 Sms Meer Gmbh Verfahren und Computerprogramm zum Analysieren der Wanddickenverteilung eines Rohres
DE102018217378B3 (de) * 2018-10-11 2020-03-26 Sms Group Gmbh Wanddickenkontrolle beim Streckreduzieren von Rohren
CN113358051A (zh) * 2020-03-06 2021-09-07 上海金艺检测技术有限公司 定径机辊架动态孔型及辊缝间隙离线检测装置及方法

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JPS60261614A (ja) * 1984-06-08 1985-12-24 Sumitomo Metal Ind Ltd 継目無管の肉厚制御方法
JPH0871616A (ja) 1994-09-01 1996-03-19 Sumitomo Metal Ind Ltd 継目無管の圧延装置および圧延制御方法
CN1107394A (zh) * 1994-11-23 1995-08-30 宝山钢铁(集团)公司 穿孔机轧制中心线测量修正技术
JP3633071B2 (ja) 1995-12-22 2005-03-30 住友金属工業株式会社 管圧延機およびロール位置設定方法
JP3743609B2 (ja) * 2000-04-13 2006-02-08 住友金属工業株式会社 継ぎ目無し管の圧延装置および圧延制御方法
DE10201717C1 (de) * 2002-01-18 2003-04-10 Sms Meer Gmbh Verfahren und Vorrichtung zum Walzen eines Rohres
JP4003463B2 (ja) * 2002-01-28 2007-11-07 住友金属工業株式会社 継目無鋼管の製造方法

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DE602004031247D1 (de) 2011-03-10
RU2006115561A (ru) 2007-11-20
CN1863609A (zh) 2006-11-15
EP1676651A4 (fr) 2007-04-25
WO2005035153A1 (fr) 2005-04-21
CN100411759C (zh) 2008-08-20
RU2319564C1 (ru) 2008-03-20
EP2085157A1 (fr) 2009-08-05
EP1676651A1 (fr) 2006-07-05
EP1676651B1 (fr) 2011-01-26

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