WO2008032508A1 - Dispositif et procédé de contrôle du statut de fabrication de tube sans soudure et installation de fabrication de tube sans soudure - Google Patents
Dispositif et procédé de contrôle du statut de fabrication de tube sans soudure et installation de fabrication de tube sans soudure Download PDFInfo
- Publication number
- WO2008032508A1 WO2008032508A1 PCT/JP2007/065350 JP2007065350W WO2008032508A1 WO 2008032508 A1 WO2008032508 A1 WO 2008032508A1 JP 2007065350 W JP2007065350 W JP 2007065350W WO 2008032508 A1 WO2008032508 A1 WO 2008032508A1
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- WIPO (PCT)
- Prior art keywords
- pipe
- thickness
- piercing
- eccentric
- circumferential direction
- Prior art date
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000012544 monitoring process Methods 0.000 title claims abstract description 15
- 238000009826 distribution Methods 0.000 claims abstract description 82
- 238000005096 rolling process Methods 0.000 claims abstract description 66
- 238000004364 calculation method Methods 0.000 claims abstract description 32
- 238000012806 monitoring device Methods 0.000 claims description 10
- 239000000284 extract Substances 0.000 claims description 4
- 230000005855 radiation Effects 0.000 description 6
- 230000007423 decrease Effects 0.000 description 5
- 230000005251 gamma ray Effects 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000000875 corresponding effect Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000002596 correlated effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/10—Piercing billets
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
- G01B17/02—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations for measuring thickness
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
- G01B21/08—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness for measuring thickness
- G01B21/085—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness for measuring thickness using thermal means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
- B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
- B21B19/04—Rolling basic material of solid, i.e. non-hollow, structure; Piercing, e.g. rotary piercing mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2261/00—Product parameters
- B21B2261/02—Transverse dimensions
- B21B2261/04—Thickness, gauge
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2261/00—Product parameters
- B21B2261/02—Transverse dimensions
- B21B2261/10—Cross-sectional area
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2261/00—Product parameters
- B21B2261/20—Temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2261/00—Product parameters
- B21B2261/20—Temperature
- B21B2261/21—Temperature profile
-
- 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
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
- B21B38/006—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring temperature
Definitions
- the present invention relates to a seamless pipe manufacturing status monitoring apparatus and method, and a seamless pipe manufacturing facility to which the manufacturing status monitoring apparatus is applied.
- the present invention seamlessly measures the eccentric thickness deviation of a pipe manufactured by a piercing mill (piercer) on the outlet side of the piercing mill and determines the cause of the eccentric thickness deviation.
- the present invention relates to a seamless pipe manufacturing status monitoring apparatus and method capable of promptly correcting manufacturing conditions during operation of the pipe manufacturing equipment, and a seamless pipe manufacturing equipment to which the manufacturing status monitoring apparatus is applied.
- a billet of raw material is heated in a rotary hearth-type heating furnace and then sequentially supplied to a rolling line.
- a hollow shell is manufactured by piercing and rolling a billet with a piercing and rolling mill using a piercer plug and a rolling roll.
- a mandrel bar is inserted in a skewer shape on the inner surface of the hollow shell, and the outer surface is constrained by a perforated rolling roll with a mandrel mill consisting of a plurality of stands, thereby reducing the thickness to a predetermined thickness.
- the mandrel bar is pulled out, and the thinned pipe is subjected to constant diameter rolling to a predetermined outer diameter with a constant diameter rolling mill to obtain a product.
- FIG. 1 is a diagram showing a schematic configuration of a piercing and rolling mill, in which FIG. 1 (a) shows a side view and FIG. 1 (b) shows a plan view. In FIG. 1 (b), the illustration of the piercer plug is omitted.
- the piercing and rolling mill 10 includes a pair of rolling rolls la and lb inclined to each other, and a bullet-shaped piercer plug 3 whose rear end is supported by a mandrel 2.
- the pair of rolling rolls la and lb are arranged such that their axial directions are parallel to each other in a side view or cross at a predetermined crossing angle, while being inclined at an inclination angle FA in opposite directions in a plan view. And are configured to rotate in the same direction.
- the piercer plug 3 is disposed between a pair of rolling rolls la and lb.
- billet B is fed between a pair of rolling rolls la and lb. After billet B has squeezed into the pair of rolling rolls la and lb, the billet B is simultaneously subjected to the rotating force and the axially advanced force due to the frictional force of the rolling rolls la and lb. Then, before reaching the tip of the piercer plug 3, the billet B is subjected to continuous and compressive stress and tensile stress (rotational forging effect) by the rolling rolls la and lb at the center of the billet B. It will be easy to open.
- FIG. 2 is a cross-sectional view of a tube for explaining the eccentric thickness deviation.
- the eccentric thickness deviation is the circumferential deviation (thickness variation) of the pipe S caused by the eccentricity (displacement) of the center C1 of the outer surface of the pipe S and the center C2 of the inner surface.
- the wall thickness of the tube S is an uneven thickness that varies in the circumferential direction with a period of 360 °.
- the ⁇ -ray thickness gauge is a principle that measures the wall thickness based on the amount of attenuation of ⁇ -rays transmitted through the tube. As shown on the side, the thickness cannot be measured when a tool such as a piercer plug or a mandrel bar is inserted in the pipe.
- the conventional proposal has been to arrange a wire thickness gauge on the exit side or the exit side of a constant diameter rolling mill on the exit side of the mandrel mill where the tool is not inserted in the tube.
- This is a method in which the thickness is measured from a plurality of directions in the cross section, and the manufacturing conditions are set based on the measurement results (for example, refer to Japanese Patent Laid-Open No. 8-71616).
- the ⁇ -ray thickness gauge has a gap between the core and the tube core. If there is a deviation, a large error occurs in the measured thickness distribution, particularly in the eccentric thickness deviation.
- the core ⁇ line thickness meter a virtual core, for example of a multi-beam method disclosed in "Iron and Steel" (a 1139 pages, second 1145, pp No. years No. 70 No. 9) gamma
- a wire thickness meter it means the position of the center of gravity at each position where the tube thickness is measured (the position where each ⁇ -ray irradiated from multiple directions intersects).
- the eccentric thickness deviation of the pipe is caused by the thermal deviation (temperature fluctuation) in the circumferential direction of the billet and the eccentric thickness deviation due to the swing of the pier sub-lag.
- the thickness is eccentric due to the swing of the pier sub-lag, measures such as correcting the core of the rolling roll of the piercing mill and discarding the abnormal piercer plug are necessary. Therefore, in order to quickly correct the manufacturing conditions during the operation of the seamless pipe manufacturing facility, it is desirable to take measures not only to measure the eccentric thickness of the pipe on the rolling line but also to determine the cause of the occurrence. It is.
- the present invention has been made in order to solve the above-described problems of the prior art, and measures the eccentric thickness deviation of a tube manufactured by a piercing and rolling mill on the outlet side of the piercing and rolling mill, and By determining the cause of the eccentric thickness deviation, the seamless pipe manufacturing status monitoring device and method and the manufacturing status of the seamless pipe manufacturing equipment can be quickly corrected during the operation of the seamless pipe manufacturing facility.
- the issue is to provide seamless pipe manufacturing equipment to which the monitoring device is applied.
- ultrasonic wall thickness is measured based on a difference in reflection time between the inner and outer surfaces of an ultrasonic wave. It has been found that the thickness can be measured accurately even when a piercer plug is inserted into the pipe by using a thickness gauge. The reason for this is that even if the piercer plug is inserted, the peer sub This is probably because an air layer is interposed between the outer surface and the inner surface of the tube, which causes the ultrasonic waves to be reflected from the inner surface of the tube.
- the thickness of the pipe in the circumferential direction can be measured simply by installing an ultrasonic thickness gauge so that the thickness of one place in the circumferential direction of the pipe can be measured.
- the distribution can be measured.
- the present inventor can use the ultrasonic thickness gage to measure the thickness distribution in the circumferential direction of the pipe on the outlet side of the piercing mill, which cannot be measured with a conventional wire thickness gage. The inventors have come up with the idea that eccentric thickness can be measured.
- the present inventor has intensively studied a method for determining the cause of occurrence of eccentric thickness deviation.
- the present inventor has found that when the billet has a circumferential heat deviation, the deformation resistance is reduced at the high temperature portion, so that the thickness of the corresponding portion of the pipe after piercing and rolling tends to be thin. .
- the deformation resistance is higher in the low temperature part than in the high temperature part, it has been found that the thickness of the corresponding part of the pipe after piercing and rolling tends to be thicker than in the high temperature part.
- the present inventor when an eccentric thickness deviation occurs in the pipe due to the billet heat, the billet is heated in the circumferential direction (and correspondingly around the pipe after piercing and rolling).
- the present invention has been completed based on the knowledge of the present inventors described above. That is, the present invention is an ultrasonic thickness meter that is installed on the exit side of a piercing mill that pierces and rolls a billet to manufacture a pipe, and measures the wall thickness of the pipe manufactured by the piercing and rolling mill; A thermometer that is installed on the outlet side of the piercing mill and that measures the surface temperature of the pipe manufactured by the piercing mill, the thickness of the pipe measured by the ultrasonic thickness gauge, and the thermometer And a calculation display means for displaying the thickness distribution in the circumferential direction of the pipe and the surface temperature distribution in the circumferential direction of the pipe based on the surface temperature of the pipe.
- the manufacturing condition monitoring apparatus is provided.
- the thickness of the pipe is measured by the ultrasonic thickness gauge, and the surface temperature of the pipe is measured by the thermometer, and is displayed by the calculation display means.
- the thickness distribution and surface temperature distribution in the circumferential direction of the pipe are displayed (for example, monitor display or chart output).
- the calculation display means compares the amount of wall thickness fluctuation or the maximum / minimum value of the wall thickness with a preset reference value.
- the calculation display means determines the cause of the occurrence of eccentric eccentricity in the tube based on the correlation between the circumferential thickness distribution of the tube and the surface temperature distribution in the circumferential direction of the tube. It is configured to
- the cause of the eccentric thickness deviation in the pipe is automatically determined by the calculation display means, so that the burden on the operator is reduced and the objective is not dependent on the individual difference of the operator.
- a highly reliable determination result can be obtained.
- the correlation between the thickness distribution in the circumferential direction of the pipe and the surface temperature distribution in the circumferential direction of the pipe is used.
- a correlation coefficient (value of 1;! To +1), which is an index indicating strength, is calculated, and if the correlation coefficient is less than a predetermined negative value, the eccentricity deviation due to billet heat deviation is calculated. If it is meat and is equal to or more than the negative value, it is possible to adopt a configuration in which it is determined that the thickness is eccentric due to the swing of the pier sub-lag.
- the calculation display means extracts an eccentric thickness deviation component of the pipe based on a thickness distribution in the circumferential direction of the pipe, and extracts the eccentric thickness deviation component of the extracted pipe and the circumference of the pipe.
- the surface temperature distribution in the direction is displayed.
- the thickness in the circumferential direction of the tube in which the measurement value may include noise or the like is extracted from the thickness distribution, and the eccentric eccentric thickness component is displayed. It is possible to more accurately determine the occurrence of uneven thickness and the cause of occurrence.
- the eccentric thickness deviation component can be extracted by applying a known frequency analysis method such as Fourier analysis to the thickness distribution in the circumferential direction of the tube.
- the calculation display means is a cause of the occurrence of the eccentric thickness deviation in the tube based on the correlation between the extracted eccentric thickness component of the tube and the surface temperature distribution in the circumferential direction of the tube. It is set to judge.
- the determination accuracy is high, and the cause of the eccentric thickness deviation is automatically determined by the calculation display means.
- the load on the operator is reduced, and it does not depend on the individual difference of the operator! /,
- the objectivity is high V, and the judgment result can be obtained.
- the present invention for solving the above-mentioned problems is that the ultrasonic wall thickness meter and the thermometer are installed on the exit side of the perforating mill that pierces and rolls the billet to produce a tube, and the perforating mill Measuring the thickness distribution and surface temperature distribution in the circumferential direction of the pipe manufactured by the above, and the eccentric thickness deviation of the pipe extracted based on the measured thickness distribution in the circumferential direction of the pipe or the thickness distribution. Determining the cause of the occurrence of eccentric thickness deviation in the pipe based on the correlation between the component and the measured surface temperature distribution in the circumferential direction of the pipe. It is also provided as a manufacturing status monitoring method.
- the present invention that solves the above-mentioned problem is characterized by comprising a piercing and rolling mill that pierces and rolls a billet to manufacture a pipe, and the production status monitoring device according to any one of the above. It is also provided as a seamless pipe manufacturing facility.
- the ultrasonic thickness gauge a laser ultrasonic thickness gauge capable of measuring the thickness of a tube in a non-contact manner can be suitably used.
- the eccentric thickness deviation of a pipe manufactured by a piercing mill can be measured on the outlet side of the piercing mill, and the cause of the eccentric thickness deviation can be determined. Therefore, even during the operation of seamless pipe manufacturing equipment, it is possible to quickly correct the manufacturing conditions so that the occurrence of eccentric wall thickness is suppressed.
- FIG. 1 is a diagram showing a schematic configuration of a piercing and rolling mill
- FIG. 1 (a) is a side view
- FIG. 1 (b) is a plan view.
- FIG. 2 is a cross-sectional view of a tube for explaining eccentric wall thickness deviation.
- FIG. 3 is a side view showing a schematic configuration of a piercing and rolling mill to which a production status monitoring apparatus according to an embodiment of the present invention is applied.
- FIG. 4 is a schematic diagram showing an example of the circumferential thickness distribution and surface temperature distribution of the pipe displayed by the calculation display means shown in FIG. 3.
- FIG. 3 is a side view showing a schematic configuration of a drilling and rolling machine to which the manufacturing status monitoring apparatus according to one embodiment of the present invention is applied.
- the production status monitoring device 20 is installed on the outlet side of the piercing mill 10 that pierces and rolls the billet B to produce the tube S, and is manufactured by the piercing and rolling mill 10.
- An ultrasonic thickness gauge 4 for measuring the wall thickness of the pipe S
- a thermometer 5 for measuring the surface temperature of the pipe S installed on the outlet side of the piercing and rolling mill 10 and manufactured by the piercing and rolling mill 10.
- the thickness distribution in the circumferential direction of the tube S and the surface temperature in the circumferential direction of the tube S based on the wall thickness of the tube S measured by the ultrasonic thickness gauge 4 and the surface temperature of the tube S measured by the thermometer 5.
- Computation display means 6 for displaying the distribution is provided.
- the piercing and rolling mill 10 has the same configuration as that of the piercing and rolling mill described with reference to Fig. 1, detailed description thereof is omitted here.
- the ultrasonic thickness gauge 4 is a laser ultrasonic thickness gauge.
- Laser Ultrasonic Thickness Gauge 4 consists of a no-laser for transmitting ultrasonic waves from the outer surface of tube S to a continuous wave laser and interferometer for receiving ultrasonic waves reflected from the inner surface of tube S. Equipped.
- the laser beam collides with the outer surface of the tube S, causing thermal contraction of the tube S and generating ultrasonic waves.
- the generated ultrasonic waves are propagated inside the tube S, reflected by the inner surface of the tube S, and returned to the outer surface of the tube S again.
- the laser beam emitted from the continuous wave laser is always on the outer surface of the tube S. Irradiated and arranged so that the reflected light from the outer surface of the tube S enters the interferometer. When the ultrasonic wave returns to the outer surface of the tube S, the surface is displaced, so that the phase of the reflected light incident on the interferometer is changed, thereby changing the interference state. It is possible to measure the thickness of the tube s by measuring the time from when the pulse laser beam is emitted from the laser to the detection of the change in the interference state.
- the ultrasonic wall thickness meter 4 is arranged so that the thickness of a predetermined one place in the circumferential direction of the stationary tube S can be measured. Specifically, the direction of each laser is set so that both the light emitted from the above-described panelless laser and the light emitted from the continuous wave laser irradiate the outer surface of the predetermined portion of the tube s. Actually, since the tube S rotates in the circumferential direction, the thickness distribution in the circumferential direction of the tube S is measured by the ultrasonic thickness gauge 4.
- the thermometer 5 is a radiation thermometer that measures the surface temperature (outer surface temperature) of the tube S by radiation temperature measurement.
- the radiation thermometer 5 is also arranged so that it can measure the surface temperature at one predetermined location in the circumferential direction of the stationary tube S, assuming that the tube S is stationary. Has been.
- the light receiving optical system of the radiation thermometer 5 is adjusted so that the detection visual field for detecting the thermal radiation emitted from the tube S is the predetermined position of the tube S. Actually, since the tube S rotates in the circumferential direction, the surface temperature distribution in the circumferential direction of the tube S is measured by the radiation thermometer 5.
- the ultrasonic thickness meter 4 and the thermometer 5 should be arranged to measure the wall thickness and surface temperature at approximately the same location in the circumferential direction of the tube S, assuming that the tube S is stationary. Is preferred. However, it is also possible to arrange the ultrasonic thickness gauge 4 and the thermometer 5 so as to measure different points in the circumferential direction of the tube S.
- the ultrasonic thickness meter 4 and the thermometer 5 are The configuration in which the ultrasonic thickness gauge 4 is arranged so as to be closer to the piercing and rolling mill 10 is illustrated, but the present invention is not limited to this, and the thermometer 5 is closer to the piercing and rolling mill 10. Let's put it up like this
- the thickness of the tube S measured by the ultrasonic thickness meter 4 described above and the surface temperature of the tube S measured by the thermometer 5 are input to the calculation display means 6.
- the calculation display means 6 may employ a force S that can be provided separately from the process computer for controlling the piercing and rolling mill 10, and a configuration in which the process computer functions as the calculation display means 6. .
- the calculation display means 6 is based on the wall thickness in the circumferential direction of the tube S and the surface temperature at a plurality of circumferential positions of the tube S that are input continuously or intermittently as the tube S rotates.
- the thickness distribution and the surface temperature distribution in the circumferential direction of the tube S are displayed (monitor display and / or chart output).
- the circumferential position of the pipe S corresponding to the input wall thickness and surface temperature is determined by, for example, the calculation display means 6 rotating the pipe S based on various piercing and rolling conditions set in the piercing and rolling mill 10. It is possible to calculate the speed based on the predicted rotation speed of the tube S and the elapsed time from the start of measurement data (thickness, surface temperature) input.
- the rotation display means 6 may calculate the rotation position (that is, the circumferential position) of the pipe S based on the input rotation position of the rolling roll la and the correlation. Is possible.
- FIG. 4 is a schematic diagram showing an example of the thickness distribution and the surface temperature distribution in the circumferential direction of the tube S displayed by the calculation display means 6.
- FIG. 4 shows an example of displaying the wall thickness distribution and surface temperature distribution for one round of the tube S (that is, the circumferential position of the pipe S is 0 ° to 360 °). Of course, it is possible to display more than one lap, such as minutes.
- the eccentric thickness deviation occurs in the pipe S. It can be determined that The calculation display means 6 compares the wall thickness fluctuation amount or the wall thickness maximum / minimum value with a predetermined reference value set in advance, and if it exceeds the reference value, eccentric thickness deviation occurs in the tube S. It is good also as a structure which determines automatically. In addition, since the thickness distribution and surface temperature distribution in the circumferential direction of the pipe as shown in Fig.
- the tube S thickness decreases as the surface temperature of the tube S increases, and the wall thickness of the tube S increases as the surface temperature of the tube S decreases. Is shown. Therefore, an operator who has visually recognized this can determine that the thickness is eccentric due to the eccentric heat of the billet B.
- the calculation display means 6 uses a known signal processing technique to increase the strength of the correlation between the circumferential thickness distribution of the tube S and the surface temperature distribution as shown in FIG. It is assumed that the correlation coefficient (1; value of! ⁇ + 1) is calculated. If the correlation coefficient is less than a predetermined negative value, it is an eccentric thickness deviation due to the heat deviation of the billet B. If the correlation coefficient is greater than the negative value, it is caused by the runout of the piercer plug 3. What is necessary is just to determine with it being eccentric eccentric thickness. In this way, if the cause of the eccentric thickness deviation in the tube S is automatically determined by the calculation display means 6, the load on the operator is reduced and the objectivity is high without depending on the individual difference of the operator! / You can get the judgment result.
- the data displayed by the calculation display means 6 includes the eccentricity of the tube S extracted from the wall thickness distribution itself measured by the ultrasonic wall thickness meter 4 rather than the wall thickness distribution itself of the tube S. It may be an uneven thickness component.
- the calculation display means 6 is configured to apply a known frequency analysis method such as Fourier analysis to the circumferential thickness distribution of the tube S. Then, from the thickness distribution that can have various frequency components, it is only necessary to extract the eccentric thickness component that varies in the circumferential direction of the tube S with a period of 360 °. In this way, the eccentric thickness component extracted from the wall thickness distribution of the tube S is displayed, compared to the case where the wall thickness distribution in the circumferential direction of the tube S where the measured value may contain noise etc.
- the calculation display means 6 is preset with the extracted fluctuation amount of the eccentric eccentric thickness component or the maximum value 'minimum value of the eccentric eccentric thickness component. Compared to a predetermined reference value, if the reference value is exceeded, a configuration may be adopted in which it is automatically determined that eccentricity of the pipe S has occurred.
- the thickness distribution in the circumferential direction of the tube S as described above is not sufficient.
- a configuration may be used in which the correlation between the eccentric thickness component of the tube S extracted from the wall thickness distribution and the surface temperature distribution in the circumferential direction of the tube S is evaluated. That is, the calculation display means 6 uses a known signal processing technique, and the correlation number (one;! To + +) is an index indicating the strength of the correlation between the eccentric thickness component of the tube S and the surface temperature distribution. (Value of 1) is calculated.
- the correlation coefficient is less than a predetermined negative value, it is an eccentric thickness deviation due to the heat of billet B, and if it is greater than the negative value, it is caused by the swaying of the piercer plug 3. What is necessary is just to determine with the eccentric eccentric thickness. If the calculation display means 6 automatically determines the cause of the eccentric thickness by using the eccentric thickness component extracted from the thickness distribution of the tube S in this way, the thickness distribution of the tube S It can be expected that the accuracy of the judgment will be improved compared to the case where it is used.
- the eccentric thickness deviation of the pipe S produced by the piercing and rolling machine 10 is measured on the outlet side of the piercing and rolling machine 10, and It is possible to determine the cause of the eccentric thickness deviation. Accordingly, even during the operation of the seamless pipe manufacturing facility, it is possible to quickly correct the manufacturing conditions and suppress the occurrence of eccentric thickness deviation in the pipe S.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
- Control Of Metal Rolling (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/310,818 US8413474B2 (en) | 2006-09-11 | 2007-08-06 | Monitoring apparatus and monitoring method of seamless pipe or tube production conditions and manufacturing facilities of seamless pipe or tube |
BRPI0719900A BRPI0719900B8 (pt) | 2006-09-11 | 2007-08-06 | aparelho de monitoramento e método de monitoramento de condições de produção de um tubo ou cano sem costura e recursos de produção de um tubo ou cano sem costura. |
EP07792023.9A EP2080569B2 (en) | 2006-09-11 | 2007-08-06 | Device and method for monitoring manufacturing status of seamless pipe and seamless pipe manufacturing facility |
CN2007800416763A CN101610854B (zh) | 2006-09-11 | 2007-08-06 | 无缝管的制造状况监控装置及方法、和无缝管制造设备 |
Applications Claiming Priority (2)
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JP2006245712A JP4826949B2 (ja) | 2006-09-11 | 2006-09-11 | 継目無管の製造状況モニタリング装置及び方法並びに継目無管製造設備 |
JP2006-245712 | 2006-09-11 |
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WO2008032508A1 true WO2008032508A1 (fr) | 2008-03-20 |
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PCT/JP2007/065350 WO2008032508A1 (fr) | 2006-09-11 | 2007-08-06 | Dispositif et procédé de contrôle du statut de fabrication de tube sans soudure et installation de fabrication de tube sans soudure |
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US (1) | US8413474B2 (ja) |
EP (1) | EP2080569B2 (ja) |
JP (1) | JP4826949B2 (ja) |
CN (1) | CN101610854B (ja) |
BR (1) | BRPI0719900B8 (ja) |
WO (1) | WO2008032508A1 (ja) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102009012644A1 (de) * | 2009-03-10 | 2010-09-23 | Europipe Gmbh | Verfahren und Vorrichtung zur Überwachung des Fertigungsprozesses bei der Herstellung von Großrohren aus Stahl mittels UOE-Verfahren |
JP4947450B2 (ja) * | 2010-11-02 | 2012-06-06 | 住友金属工業株式会社 | 穿孔圧延の不良検知方法、及び継目無管の製造方法 |
AT513852B1 (de) * | 2013-04-04 | 2014-08-15 | Constantia Teich Gmbh | Verfahren zur Ermittlung der Schichtdicke einer Verbindungsschicht zwischen zwei Verpackungsschichten |
CN104785547B (zh) * | 2013-11-07 | 2017-11-24 | 洪洋杰 | 测量装置 |
ITMI20131926A1 (it) * | 2013-11-20 | 2015-05-21 | Danieli Off Mecc | Macchina di trafilatura di tubi |
DE102014203422B3 (de) * | 2014-02-26 | 2015-06-03 | Sms Meer Gmbh | Verfahren und Computerprogramm zum Analysieren der Wanddickenverteilung eines Rohres |
CN104138905B (zh) * | 2014-07-01 | 2017-06-30 | 太原科技大学 | 无缝钢管连续式斜轧新工艺 |
JP6252509B2 (ja) * | 2015-02-13 | 2017-12-27 | Jfeスチール株式会社 | 継目無鋼管製造時の偏肉発生監視方法及び装置 |
CA2971828C (en) * | 2015-02-20 | 2021-06-08 | Jfe Steel Corporation | High-strength heavy-walled stainless steel seamless tube or pipe and method for manufacturing the same |
JP6651960B2 (ja) * | 2016-04-11 | 2020-02-19 | 日本製鉄株式会社 | 管の偏肉検出方法 |
CN106623434A (zh) * | 2016-12-21 | 2017-05-10 | 中南大学 | 一种锥形穿孔顶头 |
CN107134023B (zh) * | 2017-05-16 | 2019-05-24 | 浙江久立特材科技股份有限公司 | 一种无缝管的远程巡更系统 |
CN109500118B (zh) * | 2018-12-26 | 2023-06-09 | 重庆龙煜精密铜管有限公司 | 一种防跳车游动芯头及铜管缩径拉拔防跳车方法 |
CN111239243A (zh) * | 2020-01-20 | 2020-06-05 | 南京大学 | 一种基于激光超声和周向导波的小口径薄壁管纵向缺陷的无损检测方法 |
CN114515764A (zh) * | 2022-02-16 | 2022-05-20 | 杭州浙达精益机电技术股份有限公司 | 一种热轧钢管的壁厚及高温在线测量系统 |
CN117463799B (zh) * | 2023-12-28 | 2024-03-22 | 江苏宏宝优特管业制造有限公司 | 热轧钢管生产过程的温度控制方法及系统 |
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- 2007-08-06 BR BRPI0719900A patent/BRPI0719900B8/pt not_active IP Right Cessation
- 2007-08-06 CN CN2007800416763A patent/CN101610854B/zh not_active Expired - Fee Related
- 2007-08-06 US US12/310,818 patent/US8413474B2/en not_active Expired - Fee Related
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Also Published As
Publication number | Publication date |
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EP2080569B1 (en) | 2013-07-17 |
BRPI0719900A2 (pt) | 2014-06-10 |
JP2008062294A (ja) | 2008-03-21 |
BRPI0719900B8 (pt) | 2020-03-10 |
EP2080569A1 (en) | 2009-07-22 |
US8413474B2 (en) | 2013-04-09 |
CN101610854A (zh) | 2009-12-23 |
EP2080569B2 (en) | 2017-05-24 |
CN101610854B (zh) | 2013-05-01 |
JP4826949B2 (ja) | 2011-11-30 |
BRPI0719900B1 (pt) | 2019-12-03 |
EP2080569A4 (en) | 2012-07-11 |
US20100058824A1 (en) | 2010-03-11 |
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