JP5533447B2 - Steel plate positioning device and steel plate cutting method - Google Patents

Description

  The present invention relates to a positioning device for placing a steel plate at a predetermined position on a gantry and a method for cutting a steel plate using the steel plate positioning device.

  For example, when a raw steel plate such as a rolled thick steel plate is cut on a gantry and a product plate is collected, it is necessary to place the raw steel plate at a predetermined position. In particular, when cutting a material steel plate with a cutting device that moves on the track, it is essential to place the end surface of the material steel plate parallel to the track in order to improve workability and increase the steel plate yield. Is a requirement.

  Conventionally, when a steel plate is placed at a predetermined position on a gantry, the steel plate is lifted in a substantially horizontal state by a lifting magnet type (electromagnet adsorption type) crane, and then the distance between the steel plate end surface and the track or the steel plate end surface The distance from the end surface of the gantry was measured by a scale or visual measurement, and the steel plate lifted by using a ten thousand stick or hand key was moved and positioned in parallel to the track. For this reason, there is a problem that positioning takes a long time and mounting accuracy is poor. Moreover, since the said method is a work which requires a manpower, the improvement of safety | security was also calculated | required.

  Accordingly, an object of the present invention is to provide a steel plate positioning device capable of positioning a steel plate quickly and accurately with a simple device, without requiring manual operation, and a method of cutting a steel plate using the device. It is to propose.

  The inventors have intensively studied to solve the above problems. As a result, when the steel plate lifted almost horizontally is placed at a predetermined position on the gantry, the end surface of the steel plate is brought into contact with the stopper side surface of the positioning device installed beside the gantry, and then the steel plate is lowered and the gantry is lowered. If it is placed on top, the above-mentioned problems of the prior art can be solved, and when cutting the steel plate, the steel plate is positioned using the above device, and after the stopper is removed, cutting should be started The present invention has been completed.

  That is, the present invention is a positioning device for placing a steel plate at a predetermined position on a gantry, and two or more struts erected vertically next to the gantry, and an internal space fitted to the struts. A steel plate positioning device comprising a cylindrical stopper having a size larger than the column cross section and a fixing device for pressing the stopper against the column from the side opposite to the column.

  The stopper in the positioning device of the present invention is characterized in that when it is pressed against the support, a space is created on the support side of the internal space so that the stopper can move in the direction opposite to the support with respect to the support.

  The stopper in the positioning device of the present invention is either cylindrical or rectangular tube.

  The fixing device in the positioning device of the present invention is a hydraulic jack.

  The fixing device in the positioning device of the present invention is removable.

  The steel plate positioning device of the present invention is disposed in a cutting machine that cuts a steel plate placed on a pedestal with a cutting device that moves on the track, and two or more struts are parallel to the track. It is arranged and is erected vertically.

  Further, the present invention provides a method of cutting a steel plate placed on a pedestal with a cutting device that moves on a track, and includes two or more struts arranged parallel to the track and vertically erected. Fit a cylindrical stopper whose space size is larger than the cross section of the column, press the cylindrical stopper against the column with a fixing device installed on the column's side opposite the column, and the column is placed on the column side of the stopper's internal space. After creating a space that enables movement in the direction opposite to the gantry, the steel plate lifted almost horizontally is positioned on the gantry while lowering its end face against the gantry side surface of the cylindrical stopper. Then, a method of cutting a steel sheet is proposed, in which the pressing of the fixing device is released to remove the stopper, and the cutting of the steel sheet is started.

  According to the present invention, the positioning of the steel plate placed on the gantry can be performed quickly and accurately with a simple device, which contributes to improving workability and yield, and it is necessary to rely on manpower. Because there is no, you can work safely.

It is a schematic diagram explaining the positioning method of the conventional steel plate. It is a figure explaining the positioning device of the steel plate of the present invention. It is a figure explaining the modification of the support | pillar and stopper of the positioning apparatus of the steel plate of this invention.

  The steel plate positioning device of the present invention is used to place the material steel plate at a predetermined position on a gantry when, for example, a product plate is collected from a material steel plate such as a rolled thick steel plate by cutting such as fusing. . Therefore, an embodiment of the present invention will be described in detail below, taking as an example a cutting machine that cuts a thick steel plate placed on a pedestal and collects a product plate with a cutting device that moves on a track. .

  Conventionally, when a raw steel plate placed on a pedestal is cut by a cutting device such as plasma cutting or laser cutting that moves on the track, and a product plate is collected, the raw steel plate is placed at a predetermined position on the pedestal. In some cases, as shown in FIG. 1, the steel plate 2 is lifted almost horizontally above the gantry 1 with a lifting magnet crane 3 or the like, and in this state, the position of the end surface of the steel plate 2 and the position on which the steel plate is placed are used as a reference. The distance from the point (orbit 6 in FIG. 1) is measured with a scale 5 or the like, and the position of the steel plate is adjusted with a wand 4 or the like so that the distance becomes a predetermined value. The method of dropping and placing on 1 was common. Therefore, the conventional positioning method has a problem that it takes a long time and the positioning accuracy is inferior. In addition, since the positioning method is performed manually, it requires personnel for that purpose, and is not preferable from the viewpoint of safety.

  Therefore, in order to solve the above-described problems, the present invention has two or more vertically-arranged columns that display a predetermined position on which a steel plate is placed next to a frame on which the steel plate is placed, and fits in the column. We have developed a positioning device consisting of a cylindrical stopper whose inner space is larger than the cross-section of the column and a fixing device that presses the stopper against the column from the side opposite the column.

  FIG. 2 shows an example in which the positioning device of the present invention is disposed in a cutting machine that cuts a steel plate placed on a pedestal by a cutting device that moves on a track. In FIG. 2, reference numeral 7 denotes two or more struts that are arranged at intervals of 2 to 3 m in parallel to the track and serve as a reference for positioning the steel plate, and are erected vertically with respect to the ground. A stopper 8 is fitted. Here, the size of the internal space of the cylindrical stopper 8 needs to be larger than the cross section of the column 7. Then, the cylindrical stopper 8 is pressed against the column 7 against the column 7 by the fixing device 9 installed between the column 7 and the track 6, that is, on the side opposite to the column 7 as a result. A state is shown in which a space 10 is generated on the gantry side of the internal space of the cylindrical stopper 8 to allow the stopper to move in the direction opposite to the gantry with respect to the support column.

  And it becomes possible by using this positioning device to position a steel plate easily. That is, the column 7 as a reference for positioning the steel plate shown in FIG. 2 has two or more columns arranged parallel to the track 6 and is erected, so that the end surface of the steel plate 2 lifted horizontally by the crane 3 or the like Is brought into contact with the side surface of the cylindrical stopper 8, and the steel plate is lowered while maintaining the state, so that the steel plate can be placed at a predetermined position on the gantry.

  Here, the reason why the space 10 is provided on the gantry side of the internal space of the cylindrical stopper 8 is that when the end surface of the steel plate abuts on the cylindrical stopper, the cylindrical stopper can move in the column direction. The shock can be mitigated, even if the side surface of the stopper is deformed by the impact at the time of contact, it can be easily removed from the column, and the steel plate is placed in place as described later This is because the stopper can be easily removed by releasing the pressing of the fixing device.

  Therefore, the cross-sectional shape of the column and the cylindrical stopper 8 is such that when the stopper is pressed against the column with the fixing device, a space is formed on the frame side of the stopper internal space so that the stopper can move in the direction opposite to the column. Any of them may be used. Therefore, the column shown in FIG. 2 is not limited to the column and the stopper is cylindrical. For example, the column is a prism and the stopper is cylindrical (FIG. 3A), or the column is a column. The stopper may be in the shape of a rectangular tube (FIG. 3B), the column may be a prism and the spar may be in the shape of a rectangular tube (FIG. 3C). Furthermore, as a modified example of the present invention, as shown in FIG. 3D, the stopper may have a U-shaped cross section, and the same effect as the present invention can be obtained. The struts may be solid as in FIGS. 2 and 3 or hollow as in a steel pipe as long as strength can be secured.

  The fixing device 9 may be of any type as long as it has an effect of pressing the cylindrical stopper against the column. For example, a screw jack by human power, an air jack using air pressure, a hydraulic pressure using hydraulic pressure. A jack or the like can be used, but a hydraulic jack is preferable from the viewpoint of workability. In addition, in order to avoid the bad influence by the splash, dust, etc. which are scattered when fusing a steel plate, this fixing device is preferably set on an attachment frame fixed to the ground and can be removed during a cutting operation. In addition, you may fix by providing a cover etc. in a fixing device.

  In addition, for example, when the steel plate is simply placed at a predetermined position on the gantry and is simply stacked, the stopper may remain fixed to the column as it is after the placement is completed. However, after performing the work such as cutting or welding after placing it at a predetermined position on the gantry, release the pressing of the fixing device, remove the cylindrical stopper, and move to the next work such as fusing There is a need to.

  For example, when the positioning device of the present invention is applied to a cutting machine that cuts a steel plate with a cutting device that moves on the track, and the steel plate placed on the pedestal is cut, it stands upright in parallel with the track. Fit the cylindrical stopper to the two or more struts that are larger than the cross section of the strut, and press the cylindrical stopper against the struts with the fixing device installed on the side opposite the struts. After providing a space on the gantry side of the space that allows the stopper to move in the direction of the gantry, the steel plate lifted almost horizontally is lowered with its end face in contact with the gantry side surface of the cylindrical stopper. It is important to start cutting the steel sheet after placing it on top and releasing the pressing of the fixing device to remove the stopper.

  This is because if the work such as fusing is performed with the stopper attached, the cutting device may become a hindrance to movement, or the steel plate may be displaced due to thermal expansion caused by fusing, etc. This is because scabs are generated on the surface of the steel plate.

  Moreover, it is preferable that two or more struts in the positioning device of the present invention are arranged parallel to the track at intervals of 2 to 3 m and are erected vertically on the ground. Since the length of the raw steel plate to be cut is about 3 m at the minimum, the steel plate may not be positioned when it exceeds 3 m. On the other hand, when the length of the material steel plate is long, it may be positioned using two struts close to the front and rear ends of the steel plate. Of course, when the steel plate is long, three or more struts may be used.

  Install the positioning device of the present invention in a thick steel plate cutting machine, place the thick steel plate in a predetermined position on the gantry, compare the time until the fusing is started, and compare the result before installing the positioning device. The relative values are shown in Table 1. From this, it can be seen that the time required for steel plate positioning is greatly reduced by using the positioning device of the present invention.

  The steel plate positioning device of the present invention can be suitably used not only when placing a steel plate at a predetermined position but also when performing operations such as cutting and welding after placing the steel plate at a predetermined position.

1: Stand 2: Steel plate 3: Lifting magnet 4: Ten thousand bars 5: Scale (tape)
6: Track
7: Strut 8: Cylindrical stopper 9: Fixing device (hydraulic jack)
10: Space

Claims (7)

A positioning device for placing a steel plate at a predetermined position on a gantry. Two or more struts erected vertically next to the gantry and the size of the internal space to be fitted to the strut from the cross section of the strut A steel plate positioning device comprising a large cylindrical stopper and a fixing device for pressing the stopper against the column from the side opposite to the column. 2. The steel plate according to claim 1, wherein when the stopper is pressed against the column, a space is formed on the frame side of the internal space so that the stopper can move in a direction opposite to the frame with respect to the column. Positioning device. The steel plate positioning device according to claim 1, wherein the stopper is in a cylindrical shape or a rectangular tube shape. The steel plate positioning device according to any one of claims 1 to 3, wherein the fixing device is a hydraulic jack. The steel plate positioning device according to any one of claims 1 to 4, wherein the fixing device is removable. The steel plate positioning device is disposed in a cutting machine that cuts a steel plate placed on a gantry with a cutting device that moves on a track, and two or more struts are disposed parallel to the track and are perpendicular to the track. The steel sheet positioning device according to any one of claims 1 to 5, wherein the steel plate positioning device is provided upright. In the method of cutting a steel plate placed on a pedestal with a cutting device that moves on a track, the size of the internal space is set to two or more columns arranged parallel to the track and vertically arranged. Fit a cylindrical stopper larger than the cross section and press the cylindrical stopper against the column with the fixing device installed on the column's counter frame side. After making a space allowing movement, the steel plate lifted almost horizontally is positioned by lowering the end surface of the steel plate while abutting the side surface of the cylindrical stopper on the frame side, and then the fixing device. A method of cutting a steel sheet, wherein the pressing of the steel sheet is released to remove the stopper, and the cutting of the steel sheet is started.

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