JP4369778B2 - Shipment method of thick plate - Google Patents

Description

  The present invention relates to a method of shipping a thick plate produced at a steelworks to a customer.

  In the steelworks, when an order is received from each customer, a slab is manufactured by combining the ordered products, and the slab is hot-rolled into a long steel plate. Further, the long steel plate is ordered by the customer. A rectangular steel plate is cut into dimensions according to the above. This rectangular steel plate (also referred to as a thick plate original plate) is shipped by ship or the like and sent to each customer. Further, each consumer cuts the thick plate original plate into necessary size parts using a cutting machine or the like.

  An NC (numerical control) cutting machine is generally used as a cutting machine for each consumer. As a method of cutting a thick plate into necessary parts using this NC cutting machine, for example, as described in Patent Document 1, (1) A thick plate is placed on a cutting table of the NC cutting machine. Put. (2) The cutting is started from the cutting origin (cutting start point) of the thick plate original plate, cut along the planned cutting line, and a program for returning to the cutting origin is created again and stored in the control device. (3) The operator operates the torch of the cutting machine, and stores one cutting origin that is previously marked on the thick plate original plate in the control device. (4) When the cutting machine is started, the cutting machine operates according to the program and performs cutting along the planned cutting line from the above-described cutting origin.

However, since this NC cutting machine has an XY coordinate and performs numerical control based on the XY coordinate, if the thick plate original is not aligned with the XY coordinate, the NC cutting machine is the target. In some cases, all of the parts cannot be obtained. For this reason, it is necessary for the NC cutting machine to recognize in what state (the orientation of the thick plate original plate) the thick plate original plate is placed on the cutting table.
This can be done by placing a thick plate on the cutting table following the reference plate set in advance, or by the operator cutting the NC cutting machine at the four corners of the steel plate placed on the cutting table. Generally, a method has been adopted in which an NC cutting machine recognizes a state where a steel plate is placed by inducing a torch.
In recent years, in order to improve workability, a method has been proposed in which a state where a thick plate original is placed is detected each time using a shape recognition device equipped with a CCD camera.
Moreover, although it is necessary to mark a part symbol on the cut part, the part symbol is marked before or after cutting after the thick plate original plate is placed on the cutting table.

However, the detection (or detection) of the placing state of the thick plate original plate and the marking of the part symbol are performed after the thick plate original plate is placed on the cutting table, so that these three operations are completed. Then, the replacement work of the next thick plate original plate had to be performed, and the cutting processing efficiency of the NC cutting machine was poor.
JP 60-87972 A

  It is an object of the present invention to ship a thick plate from a steel mill so that the cutting capacity of the NC cutting machine is improved before the necessary size of components is removed from the thick plate. It is.

The present invention has been made in order to solve the above-mentioned problems, and the means 1 is that a thick plate rolled by a rolling mill in a steel mill is cooled by a cooling bed, and then sheared by a shearing machine as a thick plate original plate. upon transported to the warehouse, then the thickness plate source plate shipped to the customers, performs one or more components up by cutting the thickness plate source plate in NC cutting machine provided on the customer, the Steel Corporation In this case, when transporting the sheared thick plate to the one that is not to be painted and transporting it to the warehouse, the unpainted thick plate is near the exit side of the shearing machine, and the painted thick plate is coated. A mark indicating a severable limit position for cutting parts with an NC cutting machine by a marking device in the vicinity of the exit side of the coating apparatus on the surface of the thick plate original plate and its longitudinal direction or and marking in the width direction, it was transported to the warehouse, out to customers A shipping method thick plate source plate to.
Further, means 2 is a method for shipping a thick plate original plate according to means 1, wherein the mark is a straight line or two or more identification symbols.
In addition, the means 3 obtains in advance display information about a part symbol to be displayed on a part to be cut and taken out from the ordered thick plate original plate, and marks the part symbol based on the obtained part display information. Then, the method for shipping the thick platen according to the means 1 or 2 for shipping.

  According to the present invention, a mark indicating a cuttable limit position for picking up a part is marked on the surface of the thick plate, and more preferably, a part symbol is also marked at the shipping factory to ship to each customer. Therefore, in the customer, it is possible to immediately cut the thick plate by simply reading the marked mark and storing it in the NC cutting machine, and the cutting processing capability of the NC cutting machine is greatly improved. And so on.

The inventors of the present invention have studied various methods for improving the processing capability of the cutting machine possessed by the customer when considering consistently from the production of the thick plate at the ironworks to the cutting work by the customer.
As a result, when shipping from a steel mill to a customer, a method of cutting and shipping a thick plate original plate into parts required by the customer can be considered. However, this method is the best for the customer side, but for the ironworks side, there is a difficulty in handling at the time of shipping.

  For this reason, it is optimal if the thick plate original plate is shipped from the ironworks side and is sent to the customer side as it is by cutting it with an NC cutting machine. For this purpose, it has been found that a mark indicating a cuttable limit position for taking parts of the thick plate original plate is marked on the surface of the thick plate original plate shipped on the ironworks side.

  That is, as described above, the NC cutting machine determines the cutting position by matching the XY coordinates of the NC cutting machine to the thick plate original plate to be cut, and this cutting possible limit position is set on the surface of the thick plate original plate. For example, as shown in FIG. 1, marks D and E (which may be a straight line instead of two or more marks) are marked at least two or more places in the longitudinal direction of the thick plate, and shipped to a consumer. Then, each customer makes the NC cutting machine recognize two or more marks (or lines) marked on the surface of the plank original plate, and recognizes two or more marks on the surface of the plank original plate. Align the XY coordinates of the NC cutter with (or the line). As a result, the work of detecting the mounting state of the thick plate original plate on the cutting table as in the prior art becomes unnecessary, and the cutting processing capability of the NC cutting machine is improved.

  In particular, when the operator reads the mark, it is preferable that the position of the mark can be easily understood at a glance and that the center position can be accurately identified. For example, in the circle mark as shown in FIG. A mark with an X mark is preferable. In addition, the crossing point of x mark is a cutting possible limit position.

Furthermore, it demonstrates in detail with reference to FIGS. 1-3.
In the steelworks, the thick plate original plate is manufactured by a manufacturing line as shown in FIG. That is, a slab incorporating a custom product from each customer is rolled to a sheet thickness according to the order by a rolling mill 10 to form a long steel plate, and this long steel plate is water-cooled to about 500 to 600 ° C. by a cooling device 11. Then, it is conveyed to the cooling bed 12 and air-cooled to about 100 to 200 ° C. Then, the cooled long steel plate is sheared to a size according to the customer's order by the shearing machine 13 to form a rectangular thick plate A, which is then transported to the warehouse 15 to wait for shipment. However, there are a thick plate original A that is coated by spraying an anti-oxidant coating on the surface thereof, and a thick plate A that is transported to the warehouse 15 as it is without being painted. Therefore, the thick plate original A to be coated is transported to the warehouse 15 via the coating device 14 by the transport path 16, and the uncoated thick plate A is transported to the warehouse 15 by the transport path 17 without passing through the coating device 14. The

  In such a manufacturing process, marking devices for marking the mark indicating the cuttable limit position are provided in the vicinity of the exit side of the shearing machine 13 and in the vicinity of the exit side of the coating apparatus 14, respectively, and the exit side of the shearing machine 13 is provided. The marking device 18 provided in the vicinity is used for the thick plate original A that is not coated, and the marking device 19 provided in the vicinity of the exit side of the coating device 14 is used for the coated thick plate original A. The marking devices 18 and 19 are installed in the vicinity of the exit side of the shearing device 13 and the coating device 14 because the center position of the steel plate is aligned before shearing and before coating, so that the plate cutting position can be easily determined. This is because it becomes possible.

  Then, when the thick plate original A is conveyed to the marking devices 18 and 19, at the corner portion B of the thick plate original A, about 5 to 6 mm from one side AL and AW in the longitudinal direction and the width direction (thick plate original) In this case, since the cutting allowance of 10 to 20 mm is provided), the entered position is set as the starting position of the cuttable limit position, and at the corner portion C, one side surface AL in the longitudinal direction and the width direction in the same manner as described above. A position that is about 5 to 6 mm from the other side surface AX is set as an end point position of the cuttable limit position, and an intermediate point between the start position and the end position is set as an intermediate position. Then, paint is sprayed on the three positions to mark the marks D, E, and F shown in FIG.

  The marks D, E, and F depend on the size of the steel plate. For example, in the case of a steel plate having a width of about 2 m and a length of about 4 m, the circle is 50 mm in diameter and the line thickness is 4 to 5 mm. If it is present, it is easy for the operator to read, and if the thickness of the x line in the line is 1 to 2 mm, the position of the intersection (also referred to as the origin) can be accurately determined as the cuttable limit position.

Furthermore, when an order is received from each customer in advance, as shown in Table 1, the part symbol display position, display content, character size, etc. are cut for each part to be cut out (cut out) as shown in Table 1. The component display information is received, and based on the component display information, paint is sprayed on the surface of the thick plate original plate A to mark the component symbols 4 to 6.

  Further, in the case of a rectangular plate A having a rectangular shape such as a rectangle or a square, the origin of the marks D to F indicating the cuttable limit position can be marked on the surface of the plate by using the above method. In some cases, the dimensions and shape may not be constant. On the other hand, in the steelworks, the planar dimension of the manufactured thick plate original plate is measured by a shape recognition device equipped with the CCD camera. For this reason, even in the case of the above-described thick plate original plate with ears, the eard dimensions are calculated based on the measured planar dimensions and the order product dimension information obtained from each customer at the order stage, and the calculated eared dimensions are calculated. Can be determined in consideration of the cutting allowance described above.

  Note that the shape of the origins D to F and the number of markings are not limited to three with a mark having a cross in a circle, and the circle is not necessary when automatically reading the mark at the cuttable limit position. , X alone, circles, squares, triangles, L-shapes may be used, and the number of markings may be at least two or more. Furthermore, a straight line connecting origins D and E may be used.

The reason why it is preferable to provide the marking device 18 in the vicinity of the exit side of the shearing machine 13 and further provide the marking device 19 in the vicinity of the exit side of the coating device 14 in the ironworks will be described below.
This is because, as mentioned above, the mark indicating the limit position where cutting is possible is performed in order to mark the position of about 5 to 6 mm from one side AL, AW in the longitudinal direction and the width direction of the thick plate A. And an aligning device (not shown) is provided in the shearing device 13 and the coating device 14 so that one side surface AL of the thick plate original plate A is preliminarily provided by the aligning device. Since it is adjusted to the determined reference position, it is preferable to provide the marking devices 18 and 19 in the vicinity of the exit side of the shearing device 13 and the coating device 14 because a positioning device dedicated to the marking devices 18 and 19 is unnecessary.
Further, the marking devices 18 and 19 are provided for the coated thick plate original plate A and the uncoated thick plate original plate A, respectively, because the conveyance path from the shearing machine 13 to the warehouse 15 is different and the marking timing is different ( This is because the painted thick plate original A is marked with a mark indicating the cuttable limit position after coating, and the unpainted thick plate original A is marked after shearing).

  When the thick plate original A is shipped to each consumer in this manner, the thick plate original A is placed on the cutting table of the NC cutting machine in the same manner as described above. Then, each origin of the marks D to F marked on the thick plate original is read, and this information is input to the computer. The origin of the XY coordinates of the NC cutting machine is aligned with the origin of each of the marks D to F, and the Y axis is aligned with the origin of the mark E (or the origin of the mark F). Based on the collected information, the planned cutting lines for the parts A1 to A3 are obtained. Then, cutting is started along the planned cutting line. Since the parts symbols 4 to 6 are marked on the parts A1 to A3 that have been cut, the cut parts A1 to A3 are transported to the next process as they are.

  In addition, in the said embodiment, although each origin of the marks DF which show a cutting | disconnection limit position was provided in the length direction of the thick plate original plate, this invention may mark not in this but the width direction. However, it is preferable to mark in the longer direction with the length and width of the thick plate.

It is a surface view of the thick board original plate which shows the embodiment of this invention. FIG. 2 is an enlarged view of marks D to F in FIG. 1. It is an equipment layout of the embodiment of the present invention.

Explanation of symbols

A: Thick plate original plate A1-A3: Each part AL, AW, AX: Side surface of thick plate original plate B-C: Corner portion D-F: Mark 1-3: Planned cutting line 4-6: Component symbol 10: Rolling mill 11: Cooling device 12: Cooling bed 13: Shearing machine 14: Coating device 15: Warehouse 16, 17: Marking device

Claims (3)

After the rolled thick plate at rolling mill is cooled at a cooling bed in SeiTetsusho, sheared at a shear machine is transported to a warehouse as thick plate source plate, then shipped the thickness plate source plate to the customers, the demand At the time of cutting one or more parts by cutting the thick plate with an NC cutting machine installed in the house, the steel mill is divided into those that do not paint the thick plate and the warehouse When transporting, the unprocessed thick plate original plate is cut near the exit side of the shearing machine, and the thick plate original plate to be coated is cut by the marking device near the exit side of the coating device to be coated, using an NC cutter. The mark indicating the cuttable limit position for parts removal is marked on the surface of the thick plate original plate in the longitudinal direction or the width direction , transported to the warehouse, and then shipped to the customer. The method of shipping the thick plate.   2. The method for shipping a thick plate according to claim 1, wherein the mark is a straight line or two or more identification symbols.   Obtaining display information about a part symbol to be displayed on a part to be cut out of the ordered thick plate original plate from a customer in advance, marking the part symbol based on the obtained part display information, and then shipping. The method for shipping a thick plate original plate according to claim 1 or 2, characterized in that:

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