JP2012040654A - Method and device for manufacturing welded shape steel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manufacture a welded H-shape steel having a predetermined length while suppressing the increase of the number of work man-hours as far as possible with stable yield.SOLUTION: The range of first quality defect parts produced in a longitudinal direction before welding of a web material 2 and flanges materials 3a and 3b, the range of one or two or more second quality defect parts produced in the longitudinal direction of a long welded H-shape steel 7 after the welding, and product size information about a standard length product having a fixed product length and an irregular length product having a product length of a fixed range are acquired. On the basis of the first quality defect part information, the second quality defect information and the product size information which have been acquired, a cutting device 6 is controlled to cut out at least a standard length product from a long welded shape steel 5 between the installing position of a welding defect part detector 15 and the cutting position by the cutting device 6 while avoiding the first quality defect part and the second quality defect part.

Description

  The present invention relates to a method and apparatus for manufacturing a welded section steel.

FIG. 1 is an explanatory view schematically showing a method for manufacturing a conventional welded steel (in the following description, “welded H-section” is taken as an example).
As shown in FIG. 1, the welded H-section steel 1 is composed of one long web member 2 fed in the longitudinal direction and two long flange members 3a and 3b fed in the longitudinal direction. Are heated to a high-frequency heating device (not shown) and then combined into a H-shaped cross section, and the web material 2 and the flange materials 3a and 3b combined in the H-shaped cross section are welded by a flash butt welder 4. The welded long welded H-section steel 5 is further transported and cut into a predetermined length slightly longer than the custom dimension by a cutting device 6 that travels in synchronization, thereby having a predetermined length. The H-section steel 7 is cut in consideration of the number of orders and the yield. The welded H-section steel 7 cut to a predetermined length is accommodated in a crop removal device (not shown) disposed below, and the welded H-section steel 1 having a product length is manufactured.

  The welded long welded steel 5 is generated at a point before (a) welding by the flash butt welder 4 and is directed to the surfaces of the web material 2 and the flange materials 3a and 3b in the longitudinal direction. 1 or two or more web ridges and flange ridges (hereinafter referred to as “first quality defective portion” in this specification), (b) generated after welding by the flash butt welder 4 The web material 2 is eccentric with respect to the flange materials 3a and 3b, and a portion where the web material 2 and the flange material 3a and 3b are poorly welded extends by one or more in the longitudinal direction (in this specification, “first” 2 ”).

  Further, the long welded steel 5 includes (c) a long web material constituted by sequentially joining a plurality of coils, and a long flange material 3a, 3b constituted by sequentially joining a plurality of coils. Horizontal joints that are the joints of each coil, or open parts between the welding start and end points in the longitudinal direction of each of these long web materials and flange materials (when the line stops due to line troubles, etc.) And a portion where the welding is not performed in a steady state).

  In order to prevent the product including the poor quality portion 8 from being shipped and to suppress a decrease in yield, as shown in FIG. 1, as shown in FIG. 1, a web wrinkle detector 9, a web splice detector 10, a flange wrinkle detector 11, A flange joint detector 12, a spark detector 13, an eccentricity detector 14 and a poor weld detector 15 are arranged. When a defective quality portion 8 is generated, it is attached to each detector 9-15. The defective quality part 8 is marked by a marking device (not shown), and after cutting by the cutting machine 6, the welded H-section steel 7 including the defective quality part 8 is once taken offline and inspected in detail. In the case where the remaining length after the removal is longer than the other order dimensions, the defective quality portion 8 has been cut and removed and assigned to another order.

FIG. 2 is an explanatory view schematically showing an example of a situation in which the welded H-section steel 7 having a predetermined length (10 m) is cut out from the long welded H-section steel 5 having a length of 70 m in this way. is there.
In this example, the long welded H-section steel 5 includes a first defective quality portion 8 in which a web flange and a flange flange 8a are generated in a range of 1 m in the longitudinal direction, and a web transverse joint portion 8b is 2 m in the longitudinal direction. Since there is a third quality defect portion 8 that exists in the range of 1 mm and a third quality defect portion 8 in which the flange transverse joint portion 8b exists in the range of 1 m in the longitudinal direction, a 10 m long welded H-section steel is used. Four scraps, two welded H-sections with a length of 8 m, and scraps with a length of 2 m, 10 m, and 2 m.

  In this way, when the welded H-section steel 7 having a predetermined length is cut out from the long welded H-section steel 5, the yield varies remarkably depending on the position and range of occurrence of the defective quality portion 8, and the yield is stable. It was difficult to produce welded H-section steel. In addition, it is necessary to take the welded H-shaped steel 7 including the defective quality part 8 offline and then to cut and remove the defective quality part 8, and the work man-hours cannot be denied.

  Patent Document 1 discloses an effective remaining length calculation unit for obtaining an effective remaining length of a material to be cut that can be continuously collected in a cutting apparatus that performs cutting while synchronizing with a long shaped steel that is continuously manufactured, and for each lot. Cutting result management unit that calculates whether cutting is possible or not based on cutting results of cutting, effective remaining length input from effective remaining length calculating unit, and cutting average length input from cutting result management unit Based on the possibility of cutting, the optimal cutting length that minimizes the amount of cut-down by repeatedly performing simulation calculations on all combinations of various combinations of the maximum cutting length, average cutting length, and minimum cutting length for a given product cutting length By providing a cutting control device with a combination calculation unit that calculates and sets the combination pattern, even if a defective part or an untreated annealing place due to a mill stop occurs, the amount of devaluation is always minimized and continuously Invention to improve the product yield of the turbulent scale cut in in is disclosed.

JP-A-7-204926

  As described above, in the welded H-section steel, not only the first quality defective portion and the third quality defective portion that occur at the time before the web material and the flange material are welded by the flash butt welder, A second quality defect portion that occurs at the time after the welding also occurs. For this reason, it is difficult to accurately determine the effective remaining length of the material to be cut that can be continuously collected by the effective remaining length calculation unit in the invention disclosed in Patent Document 1, and a welded H-section steel having a predetermined length. Is difficult to manufacture while maintaining a stable yield and suppressing an increase in work man-hours as much as possible.

  In a broad sense, the object of the present invention is to improve yield without reducing line efficiency when a long product manufactured continuously by combining a plurality of materials is cut by a cutting machine while traveling synchronously. Is to provide a technology for setting an optimal cutting length for the purpose of, and specifically, a welded H-section steel having a predetermined length is suppressed in a stable yield and an increase in work man-hours as much as possible. However, it is providing the manufacturing method and manufacturing apparatus of the welded shape steel which can be manufactured.

  The present invention comprises a long web material that is configured by joining a plurality of coils and fed in the longitudinal direction, and a long web material that is constructed by joining a plurality of coils and fed in the longitudinal direction. Welding by combining the flange material with a predetermined cross-sectional shape to make a long welded shape steel, and welding from the long welded shape steel by a cutting device that runs in synchronization with the long welded shape steel that is subsequently conveyed When manufacturing a shape steel by cutting it, a defect inspection part of the web material and flange material before welding is detected with a scissors inspection device, and this detection result is combined with information on the position of the joint part of multiple coils. The first quality defect portion information is obtained, and the information on the weld defect portion detected by the welding defect portion detection device that detects the weld defect portion generated in the long welded steel after welding is obtained as the second quality defect. A certain product length as part information The product dimension information of each of the standard product and the irregular product having a certain range of product length is obtained, and the obtained first quality defect part information, second quality defect part information, and product dimension information are obtained. Based on the long welded section of the length between the installation position of the welding defect detection device and the cutting position by the cutting device, avoid the first quality defect part and the second quality defect part, A method for producing a welded section steel, wherein at least a standard product is collected.

  From another point of view, the present invention provides a long web material that is configured by joining a plurality of coils and fed in the longitudinal direction, and a web material that is constructed by joining a plurality of coils and fed in the longitudinal direction. A flash butt welder that combines a long flange material fed into a predetermined cross-sectional shape and welds it to make a long welded shape steel, while traveling in synchronization with the long welded shape steel being conveyed A cutting device for cutting a welded shape steel having a predetermined length from a long welded shape steel, and a weld having a predetermined length disposed below the welded shape steel having a predetermined length that has been cut The crop removal device that accommodates the shape steel, and the defective quality parts of the web and flange material before welding are detected by the scissors inspection device, and the detection results are combined with the position information of the joints of multiple coils. To obtain the first defective part information Information on a defective weld portion detected by a defective weld portion detection device for detecting a defective weld portion occurring in a long welded steel after welding is obtained as second defective quality portion information, and a certain product length. Product dimensional information for each of the fixed-size product and the random product having a product length within a certain range, and the obtained first quality defect part information, second quality defect part information, and product dimension information. From the long welded shape steel having a length between the installation position of the welding failure part detection device and the cutting position by the cutting device, avoid the first quality failure part and the second quality failure part. And a control device for controlling the cutting device so that at least the selected product is cut out.

In the present invention, it is desirable to collect a plurality of standard-sized products between the leading end of the long welded shape steel or the assembled defective portion between the leading defective portions.
In these present inventions, when the remaining length between the defective parts at the head from the assembled position is within the allowable range (below a constant), it is desirable to finish the assortment before the defective part.

  In these present inventions, when sampling of irregular items is selected at the transverse joint that is the joint of each of the long web material and the long flange material, one of the standard is canceled, It is desirable to collect random items.

In these aspects of the present invention, it is desirable to collect irregularly-sized products so that the remaining length between the defective parts at the head from the assembled position of the standard-sized products is minimized.
In these present inventions, when it is possible to collect a product such as a random product between one defective part and another subsequent defective part, the defective part is not automatically cut by a cutting machine. It is desirable to cut the defective part and collect the product in a subsequent process.

  In these present inventions, when it is impossible to collect a product such as a random product between one defective portion and another subsequent defective portion, the two defective portions are collectively processed as scrap. It is desirable.

  Furthermore, in the present invention, in consideration of at least one of the lengths that cannot be withdrawn to the crop removal device, the length that can be withdrawn, the length that cannot be taken into the inspection site, and the maximum length of the combination, It is desirable to cut the crop part including the part.

  According to the present invention, a welded H-section steel having a predetermined length can be manufactured with a stable yield and while suppressing an increase in work man-hours as much as possible.

FIG. 1 is an explanatory view schematically showing a conventional method for producing a welded H-section steel. FIG. 2 is an explanatory view schematically showing an example of a situation in which a welded H-section steel 7 having a predetermined length (10 m) is cut out from a long welded H-section steel having a length of 70 m. FIG. 3 is an explanatory view showing a configuration example of the manufacturing apparatus for the welded H-section steel 1 according to the present invention. FIG. 4 shows a situation in which a welded H-section steel having a predetermined length (10 m) is cut out from a long welded H-section steel having a length of 70 m by the manufacturing apparatus according to the present invention, as in the case shown in FIG. It is explanatory drawing which shows an example of this. FIG. 5 (a) is an explanatory view showing an assembling process for collecting standard-sized products, and FIG. 5 (b) is for collecting irregular-sized products at the remaining length after the standard-sized product assembling processing. It is explanatory drawing which shows these assembling processes. FIG. 6A is an explanatory diagram illustrating processing that includes a defective portion in a product, and FIG. 6B is an explanatory diagram illustrating processing that does not include the defective portion in the product. FIG. 7 is an explanatory diagram showing crop section cutting processing taking into account various lengths. FIG. 8 is an explanatory diagram showing a crop section cutting process considering various lengths. FIG. 9 is an explanatory diagram showing a crop portion cutting process in consideration of various lengths. FIG. 10 is an explanatory diagram showing the cropped part cutting process considering various lengths.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings.
FIG. 3 is an explanatory diagram showing a configuration example of the manufacturing apparatus 20 for the welded H-section steel 1 according to the present invention. In the following description, the same components as those in the manufacturing apparatus shown in FIG.

  Since the manufacturing apparatus 20 includes the flash butt welder 4, the cutting apparatus 6, a crop unloading apparatus (not shown), and a control apparatus 21, these components will be described.

[Flash butt welding machine 4]
The flash butt welder 4 combines the long web material 2 to be fed and the long flange materials 3a and 3b fed at the same speed in a H-shaped cross section and welds the long web material 2 The welded H-section steel 5 is manufactured.

  Each of the long web member 2 and the long flange members 3a and 3b is constituted by successively joining a plurality of coils. A web joint detector 10 and a flange joint detector 12 for detecting the joint of each coil are arranged. The web joint detector 10 and the flange joint detector 12 both detect and track the joint portion of each coil, which is the third quality defect portion, so that the third quality failure portion is continuously detected. Output to the control device 21.

  Further, a web wrinkle detector 9 and a flange wrinkle detector 11 are arranged. The web wrinkle detector 9 and the flange wrinkle detector 11 are both generated at the time before welding by the flash butt welder 4 and directed to the surfaces of the web material 2 and the flange materials 3a and 3b in the longitudinal direction. By detecting and tracking the first quality defect portion, which is a portion where one or more web ridges and flange ridges exist extending, the first quality defect portion is continuously transferred to the control device 21. Output.

Further, a spark detector 13, an eccentricity detector 14, and a welding failure detector 15 are disposed downstream of the flash butt welder 4.
Each of the spark detector 13 and the poor weld detector 15 is one or two or more second poor quality portions generated in the longitudinal direction of the long welded steel 5 after welding by the flash butt welder 4. By detecting and tracking the range of the poor weld portion, the second poor quality portion is continuously output to the control device 21.

  Further, the eccentricity detector 14 is an eccentricity of the web material 2 with respect to one or two or more flange materials 3a and 3b generated in the longitudinal direction of the long welded steel 5 after welding by the flash butt welder 4. By detecting and tracking a range of a certain second quality defect portion, the second quality defect portion is continuously output to the control device 21.

  The flash butt welder 4 may be any one commonly used as this type of welder, and is well known to those skilled in the art, and thus further description of the flash butt welder 4 is omitted.

[Cutting device 6]
The cutting device 6 is for cutting a welded shape steel 7 having a predetermined length from the long welded H-shaped steel 5 while traveling in synchronization with the long welded H-shaped steel 5 being conveyed. is there. The cutting device 21 controls cutting conditions such as the cutting position and cutting start timing of the long welded H-section steel 5 by a control signal output from the control device 21 described later.

  One cut-out position of the welded H-section steel 7 having a predetermined length is set starting from the end of the range of the good quality portion of the long welded H-section steel 7 to reduce the cut-off amount. In order to be desirable.

The cutting device 6 may be any one commonly used as this type of cutting device, and is well known to those skilled in the art, so further description of the cutting device 6 will be omitted.
[Crop removal device]
The crop removal device is arranged below the welded steel 7 having a predetermined length and accommodates the welded steel 7 having a predetermined length. In the present invention, the housing state of the welded H-section steel 7 in this crop removal device is detected by appropriate means, and the detection result is output to the control device 21 described later.

  The crop removal device may be any one commonly used as this type of crop removal device, and is well known to those skilled in the art, so further description of the crop removal device is omitted.

[Control device 21]
The control device 21 (a) is generated in the longitudinal direction of each of the web material 2 and the flange materials 3a and 3b before the welding by the flash butt welder 4 detected by the web wrinkle detector 9 and the flange wrinkle detector 11. A range of one or more first quality defects, and (b) long after welding by the flash butt welder 4 detected by the spark detector 13, the eccentricity detector 14 and the welding failure detector 15. A range of one or more second quality defects occurring in the lengthwise direction of the welded steel 5 and (c) a plurality of web joint detectors 10 and flange joint detectors 12 A range of one or two or more third parts generated in the longitudinal direction of each of the web material 2 and the flange materials 3a and 3b including the horizontal joint portion or the open portion which is a joint portion of the coil is continuously provided. It is input to.

  The control device 21 is based on the information regarding the ranges of the first quality defective part, the second quality defective part, and the third part, and the production plan of the welded H-section steel 1 (the number of production per length). Among the long welded H-section steel 5, the weld H having a predetermined length from the range of one or more quality good portions excluding the range of the first poor quality portion and the range of the second poor quality portion. The cutting device 6 is controlled by outputting a control signal so that the section steel 7 can be cut.

The manufacturing apparatus 20 according to the present invention is configured as described above. Next, a situation where the welded H-section steel 1 is manufactured by the manufacturing apparatus 20 according to the present invention will be described.
In the manufacturing apparatus 20 shown in FIG. 1, first, a long web material 2 that is configured by joining a plurality of coils and fed in the longitudinal direction, and a plurality of coils that are fed in the longitudinal direction, and the longitudinal direction thereof. A long welded H-section steel 5 is manufactured by combining the long flange members 3a and 3b fed to the H-shaped section and welding them with a flash butt welder 4.

  Next, the welding H-section steel 7 having a predetermined length is cut from the long welding H-section steel 5 by the cutting device 6 that travels in synchronization with the long welding H-section steel 5 that is continuously conveyed after welding. . The welded H-section steel 7 having a predetermined length that has been cut is accommodated in a crop dropping device disposed below. In this way, the welded steel 1 having a product length is manufactured by the manufacturing apparatus 20.

  At this time, in the manufacturing apparatus 20, one or more first qualities generated in the longitudinal direction of the web material 2 and the flange materials 3 a and 3 b before welding by the flash butt welder 4 in the control device 21. The range of defective portions, the range of one or more second quality defective portions generated in the longitudinal direction of the long welded H-section steel 5 after welding by the flash butt welder 4, and the joint portions of a plurality of coils The range of 1 or 2 or more 3rd parts which generate | occur | produce in the longitudinal direction of each of the web material 2 and the flange materials 3a and 3b including the horizontal joint part or open part which is is calculated | required continuously.

  Based on this result and the production plan (the product dimension information of each of the standard product having a certain product length and the irregular product having a certain range of product length), the long welded H shape A welded H-section steel 7 having a predetermined length is selected from the range of one or more quality good portions excluding the range of the first poor quality portion and the range of the second poor quality portion of the steel 5. The welded H-section steel 1 is manufactured by cutting.

  That is, in the present invention, for tracking the positional information of the first quality defect portion to the second quality failure portion with respect to the web material 2 and the flange materials 3a and 3b constituting the long welded H-section steel 5. Web web detector 9, web web detector 10, flange web detector 11, and flange web detector 12. Then, after the web material 2 and the flange materials 3a and 3b are welded to form the long welded H-shaped steel 5, the position information of the first to second poor quality portions that are tracked is superimposed. Thus, the accurate position information of the poor quality portion in the long welded H-section steel 5 is continuously tracked. Thereby, the defective part of the web material 2 and the flange materials 3a and 3b detected before becoming the long welded H-shaped steel 5 can be traced until reaching the cutting machine 6. Therefore, regardless of whether it is detected before or after the long welded H-section steel 5 is detected, it is possible to track the defective portion up to the position of the cutting machine 6 or to remove the cutting machine 6 and the crop. Can be removed with the device.

  Next, in the present invention, information on the first quality defect portion to the second quality defect portion input to the control device 21 and information on a plurality of order lengths based on the production plan input to the control device 21. Based on the above, the cutting length of the welded H-section steel 7 is set. Since the order length is generally a combination of a plurality of lengths, an optimum cutting length can be set to improve the product yield.

  In the present invention, when the first quality defective portion to the second quality defective portion are adjacent and continuously present, the cutting length is set so that a plurality of adjacent poor quality portions are collectively cut into one product. It is desirable to set the length. In order to continuously cut a short length by the cutting machine 6 that runs synchronously, it is necessary to reduce the line speed. This is because cutting the long welded H-section steel 5 with such a length that can be cut by cutting can prevent the line efficiency from being lowered.

  In the present invention, it is desirable to change the cutting length depending on the situation of the crop removal device. If the crop removal device cannot be used, set the cutting machine 6 to a length that allows the long welded H-section steel 5 to flow to the downstream of the line and then remove the defective portion. This is because it is not necessary to stop the line even when the lower apparatus cannot be used.

Furthermore, in the present invention, it is desirable to compare the set value of the cutting length for the cutting machine 6 with the actual value of the cutting length, calculate the surplus length, and reflect it in the setting of the cutting length.
FIG. 4 shows that the manufacturing apparatus 20 according to the present invention cuts out a welded H-section steel 7 having a predetermined length (10 m) from a long welded H-section steel having a length of 70 m, as in the case shown in FIG. It is explanatory drawing which shows an example of the situation which is typically shown.

  According to the manufacturing apparatus 20 according to the present invention, five welded H-section steels each having a length of 10 m, two welded H-section steels having a length of 8 m, scraps having a length of 3 m, and unassembled parts having a length of 1 m. can get. It can be seen that the yield is significantly improved as compared to the case shown in FIG.

Moreover, according to the manufacturing apparatus 20 which concerns on this invention, since it is not necessary to cut | disconnect the welding H-section steel 7 again offline, productivity can be improved significantly.
Next, the logic which determines the cutting-out position of the welding H-section steel 7 from the long welding H-section steel 5 with the control apparatus 21 is demonstrated.

  FIG. 5 (a) is an explanatory view showing a situation in which the fixed weld H-section steel 7 is preferentially cut out from the long weld H-section steel 5, and FIG. 5 (b) is a diagram showing a long weld H-section. It is explanatory drawing which shows the condition which preferentially cuts out the irregular welding H-section steel 7 from steel 5. FIG.

  In the logic shown in FIG. 5 (a), the maximum number of the standard welded H-section steel 7 having a standardized length can be cut from the range of the good quality part of the long welded H-section steel 5. When the length of the good quality portion remaining after the cutting is less than a predetermined length, the cutting of the welded H-shaped steel 7 with a constant length from the range of the good quality portion is finished. In this way, it is possible to collect a plurality of standard products (order length + extra length) between defective portions at the tip from the material tip or the assembled position.

  However, as shown in the lower diagram of FIG. 5A, when the R product is selected to be collected at the horizontal joint, one cut of a standard length is canceled and the R product is always collected. If the product is out of the allowable range, the R product is assembled during this time. As will be described later, this process aims to minimize the remaining length.

  The logic shown in FIG. 5 (b) cuts the maximum number of the welded H-section steel 7 having a predetermined length from the range of the good quality part of the long welded H-section steel 5 that can be cut. When the length of the good quality portion remaining after the cutting is less than a predetermined length, from the range of the good quality portion, the irregular welding with a shorter length than the regular welded H-section steel. When cutting the H-section steel and the length of the good quality portion remaining after the cut is less than a predetermined length, the cutting of the irregularly welded H-section steel from the range of the good quality portion is terminated. . In this way, R products (addition of extra length) can be sampled so that the remaining length between the defective portions at the head is minimized from the position where the assembling is completed.

in this way,
FIG. 5A shows an assembling process for collecting a standard product. This is the first process performed in the assembling process. Collect a plurality of fixed-length products (order length + extra length) between the leading end of the long welded steel or the combined defective position from the leading defective part. When the remaining length between the defective parts at the head from the assembled position is within the allowable range (below a constant), the pre-defective part assembling is terminated. However, if you choose to collect random items at the horizontal joint, cancel one standard and always collect irregular items. The remaining length may increase when sampling is completed, but if the irregular length is collected from the length of (1 standard product + remaining length), the final remaining length is minimized. This is because this can be prevented.

  FIG.5 (b) shows the assembling process for extract | collecting irregular-sized goods in a remaining length part after the assembling process of a fixed-size product. In other words, irregularly-sized products are collected so that the remaining length between the defective parts at the head from the position where the standard-sized products are assembled is minimized. Thus, in the process shown in FIG. 5B, in order to reduce the remaining length portion as much as possible, when the standard length product cannot be collected from the remaining length portion, the irregular length product is collected and the remaining length portion (scrap portion) is collected. ) Is minimized. Thereby, a yield improves.

  FIG. 6A shows a process of including a defective portion in the product. FIG. 6 (a) shows that when it is possible to collect a product such as a random product between one defective part and another defective part subsequent thereto, the defective part is not automatically cut with a cutting machine. The process which cut | disconnects a defective part and collects a product in a post process is shown. That is, when a plurality of defective portions are automatically cut, the line speed must be reduced in order to cut the defective portions, resulting in a reduction in efficiency. For this reason, the product is collected in a later process without reducing the line speed.

  FIG. 6B shows a process in which the defective part is not included in the product. In FIG. 6B, when it is impossible to collect a product such as a random product between one defective part and another subsequent defective part, a plurality of defective parts are considered as one group. Process as scrap. Thereby, it is possible to operate efficiently without reducing the line speed.

  7 to 10 consider the lengths of the length that cannot be removed to the crop removal device, the length that can be removed, the length that cannot be taken into the inspection site, and the maximum length of the combination in order to cut the crop portion including the defective portion. The cropped part cutting process is shown. 7 to 10 are No. Although the crop processing is shown separately in each case of 1 to 17, the greatest purpose is also to operate efficiently without reducing the line speed.

  In other words, the crop removal device is a device and place for dropping scrap, but if the scrap is longer than the frontage of this device, it cannot be dropped into the frontage because it cannot be dropped into the frontage. There is a length (length that can be removed).

  In addition, the cut welded H-section steel is transported to the inspection site, but since the number of inspection sites that can be stored is limited, the inspection site is full when the short size welded H-sections are continuous, the line speed In order to operate the inspection site efficiently, when a short size is continuous, a plurality of pieces are cut together and there is a length that cannot be taken into the inspection site.

In addition, there is a maximum assembling length to convey a welded H-section steel having a size that does not exceed the size of the inspection area.
7 to 10 show a method for operating efficiently without reducing the line speed in consideration of each of these lengths.

  In this way, according to the present invention, a welded H-section steel having a predetermined length can be manufactured with a stable yield and while suppressing an increase in work man-hours as much as possible.

DESCRIPTION OF SYMBOLS 1 Welding H-section steel 2 Web material 3a, 3b Flange material 4 Flash butt welding machine 5 Long welding H-section steel 6 Cutting device 7 Welding H-section steel 8 of predetermined length Quality defect part 9 Web defect detector 10 Web Horizontal detector 11 Flange flange detector 12 Flange horizontal detector 13 Spark detector 14 Eccentricity detector 15 Weld failure detector 20 Manufacturing device 21 according to the present invention Control device

Claims (9)

A long web material that is configured by joining a plurality of coils and fed in the longitudinal direction, and a long flange material that is constructed by joining a plurality of coils and fed in the longitudinal direction are predetermined. A long welded shape steel is formed by welding in combination with the cross-sectional shape of the long welded shape steel, and the long welded shape steel is welded from the long welded shape steel by a cutting device that runs in synchronization with the long welded shape steel that is subsequently conveyed. When cutting and manufacturing,
A quality defect portion of the web material and the flange material before the welding is detected by a wrinkle inspection device, and the detection result is combined with information on positions of the joint portions of the plurality of coils. Seeking information,
Obtaining information on a defective weld portion detected by a defective weld portion detection device for detecting a defective weld portion occurring in the long welded steel after the welding as second defective quality portion information,
Obtain product dimension information for each of the standard product having a certain product length and the irregular product having a certain range of product lengths.
Based on the obtained first quality defect portion information, second quality defect portion information, and product dimension information, the length between the installation position of the defective weld portion detection device and the cutting position by the cutting device. A method for producing a welded shape steel, wherein at least the standard product is collected from the long welded shape steel, avoiding the first and second poor quality portions.   The method for manufacturing a welded shape steel according to claim 1, wherein a plurality of fixed-size products are sampled between the leading end of the long welded shape steel or the combined defective position.   The method for manufacturing a welded steel according to claim 2, wherein when the remaining length between the defective parts at the head from the assembled position is within an allowable range, the assembling before the defective parts is finished.   When sampling of irregular items is selected at the transverse joint that is the coil joint of each of the long web material and the long flange material, canceling one of the standard items, The manufacturing method of the welded shape steel according to claim 2 or claim 3 collected.   The welded shape steel according to any one of claims 1 to 4, wherein a random-size product is sampled so that a remaining length between defective portions at the head is minimized from a position where the standard-size product is assembled. Production method.   When it is possible to collect a product such as an irregular product between one defective part and the other defective part that follows, the defective part is not cut by the cutting machine, The method for manufacturing a welded steel according to any one of claims 1 to 5, wherein the product is cut and the product is collected.   Claims 1 to claim 2 in which, if it is impossible to collect a product such as a random product between one defective portion and another subsequent defective portion, the two defective portions are collectively processed as scrap. Item 6. The method for producing a welded steel according to any one of Items 5 to 5.   The crop part including the defective part is cut in consideration of at least one of the length that cannot be withdrawn to the crop removal device, the length that can be removed, the length that cannot be taken into the inspection site, and the maximum length of the combination. The manufacturing method of the welded shape steel described in any one of Claim 1- Claim 7. A long web material that is configured by joining a plurality of coils and fed in the longitudinal direction, and a long flange material that is constructed by joining a plurality of coils and fed in the longitudinal direction are predetermined. A flash butt welder that is welded in combination with the cross-sectional shape of
A cutting device for cutting a welded shape steel having a predetermined length from the long welded shape steel while traveling in synchronization with the long welded shape steel being conveyed,
A crop removal device that is disposed below the cut welded steel having a predetermined length and accommodates the welded steel having the predetermined length;
A quality defect portion of the web material and the flange material before the welding is detected by a wrinkle inspection device, and the detection result is combined with information on positions of the joint portions of the plurality of coils. Obtaining information, obtaining information on a defective weld portion detected by a defective weld portion detection device for detecting a defective weld portion occurring in the long welded steel after the welding as second defective quality portion information, and The product dimensional information of each of the standard product having a certain product length and the irregular product having a certain range of product lengths is obtained, and the obtained first quality defect portion information and the second quality are obtained. Based on the defective part information and the product dimension information, from the long welded shape steel between the installation position of the defective welding part detection device and the cutting position by the cutting device, the first quality defective part And avoid the second quality defect part, Both the so cut out constant 択製 products manufacturing apparatus of the welding section steel, characterized in that it comprises a control device for controlling the cutting device.