JP2009006349A - Method of manufacturing metallic plate whose one side quality is to be guaranteed - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method by which the quality on one side is guaranteed about a metallic plate whose one side quality is to be guaranteed by a manufacturer and by which lowering of production efficiency of the metallic plate and an increase in the manufacturing cost are not caused as far as possible. <P>SOLUTION: When conforming to an original manufacturing process, either a surface the quality of which is to be guaranteed is a front side or a rear side is predicted and, as necessary, the surface and back faces of the metallic plate are reversed in the middle of manufacturing the metallic plate. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a method of manufacturing a metal plate that should guarantee the quality of one side.

For example, as shown in FIG. 9, the manufacturing process of steel is roughly divided into iron making, steel making, hot rolling, cold rolling, etc., and surface treatment and refining such as plating are often added to this. .

  In recent years, customers' demands for the surface quality of steel and other metal plate (including metal strip) products have become increasingly severe, and various measures have been taken by metal plate manufacturers to meet these requirements. Is taking.

  For example, for the purpose of minimizing the difference in roughness between the front and back surfaces of the metal plate, Patent Document 1 proposes a method of reversing the front and back surfaces of the metal plate between the two cold rollings. Yes.

  In addition, in relation to the explanation in the best mode for carrying out the invention to be described later, Patent Document 2 and Patent Document 3, which are related to the severity of customer demand for the surface quality of recent metal plate products, are as follows. Let me mention.

  In Patent Document 2, quality information generated at the time of manufacturing a steel material is stored in a database by the manufacturer of the steel material, and the quality information stored in the database is online by other manufacturers and / or customers who further process the steel material. It is proposed to share quality information with a manufacturer and with another manufacturer and / or customer, such as reading.

In Patent Document 3, a surface defect meter for detecting surface defects and an ink marker for marking with ink at a defect position are installed in a line for processing a steel plate, and based on information on the surface defects detected by the surface defect meter, Calculates defect name, defect grade, defect length, and defect position in the width direction, further determines whether the defect is a harmful defect, a difficult-to-determine defect, or a harmless defect. It is proposed that when it reaches the position where it is installed, marking is made so that it can be recognized, so that harmful defects can be identified reliably and easily.
Japanese Patent No. 2635731 JP 2003-048222 A JP 2001-347315 A

  However, in Patent Document 1, it is not clear how to reverse the front and back surfaces of the metal plate between two cold rolling operations.

  Further, the demand from customers for the surface quality is not only when the uniformity on both the front and back sides is required, such as the difference in roughness between the front and back surfaces of the metal plate is small. There may be a requirement for surface quality on only one side.

  Furthermore, when aiming for homogeneity on both front and back sides, as in Patent Document 1, it was originally planned to reverse the front and back surfaces of the metal plate by some means (not obvious in Patent Document 1). Since it is necessary to intervene an additional manufacturing stage different from the process, which may lead to a decrease in the production efficiency of the metal plate and an increase in manufacturing cost, an improvement to this is preferably desired.

  The present invention has been made to solve such problems as in the prior art, and by what method the manufacturer can do it for a metal plate that should guarantee the quality of one side, and More preferably, an object of the present invention is to provide a method for solving the problem of how to prevent a reduction in the production efficiency of metal plates and an increase in manufacturing cost.

That is, the present invention is as follows.
(1) For the metal plate that the manufacturer should guarantee the quality of one side, when the original manufacturing process is followed, the surface that should guarantee the quality is predicted to be front or back. A method for producing a metal plate to guarantee the quality of one side, wherein the front and back surfaces of the metal plate are reversed during the production of the metal plate.
(2) When the original manufacturing process is followed, the direction of rotation when winding the tip of the metal plate is originally planned in the line that should have passed the metal plate that was originally intended to pass. (1) The manufacturing method of the metal plate which should guarantee the quality of the single side | surface characterized by making it reverse.
(3) When the original manufacturing process is followed, the direction of rotation when the tip of the metal plate is unwound in the line that should be processed by the metal plate that was originally intended to pass is originally planned. (1) The method for producing a metal plate that should guarantee the quality of one side, which is the reverse of the above.
(4) When sharing quality information online between a manufacturer and another manufacturer and / or customer, the front and back plates of the metal plate at another manufacturer and / or customer Any one of (1) to (3), wherein it is determined whether or not it is necessary to reverse the front and back surfaces of the metal plate during the production of the metal plate based on shared information about the surface. The manufacturing method of the metal plate which should guarantee the quality of one side as described in 1.
(5) When the surface defects detected by the surface defect meter for detecting surface defects installed in a line for processing the metal plate are present only on one side of the metal plate, the surface on the side where the surface defects exist The method for producing a metal plate whose quality is to be guaranteed on one side according to any one of (1) to (4), wherein the surface is not on the side whose quality should be guaranteed.

ADVANTAGE OF THE INVENTION According to this invention, the method which can guarantee the quality of a single side about the metal plate which a manufacturer should guarantee the quality of a single side can be provided, and also the fall of the production efficiency of a metal plate and manufacturing cost are possible as much as possible. It is possible to provide a method that can prevent the increase of

(First invention)
In the present invention, when the metal plate to which the manufacturer should guarantee the quality of one side follows the original manufacturing process, the surface to be guaranteed the quality is predicted to be front or back, if necessary, During the production of the metal plate, the front and back surfaces of the metal plate are reversed.

  The specific contents and the reason for doing so will be explained in order below.

Now, assume that a customer orders a metal plate that the manufacturer should guarantee the quality of one side. For example, a customer requests a metal plate wound in a coil after the surface treatment (plating) is performed by the manufacturer. For example, in the shear line 200 of the customer as shown in FIG. The order is such that when unrolled, there should be no surface defects, patterns, or uneven luster only on either side of the metal plate. (The metal plate sheared into a cut plate shape by the customer's shear line 200 is stored in a pile by a piling device, and used for processing in a can making machine or a press machine in another place (not shown). )
As examples of such metal plates, there are various types, such as clear coating only on the front side of the metal plate before can making, and toys that are die-cast into a desired shape by pressing.

  With such a metal plate, when it is unwound on the customer's line, there should be no surface defects, patterns, uneven luster, etc. on the front side of the metal plate. If it doesn't have to be only on the side, it will be either.

  In the customer, there are various cases such as processing the unrolled metal plate by shearing it into a cut plate shape, or by reversing the front and back without performing shearing. As shown in the above, either surface flaws, patterns, gloss unevenness, etc. should not be on the front side of the metal plate, or only on the back side. There is no change in the conclusion that

  Alternatively, the manufacturer may receive the metal plate at another manufacturing stage within the company, that is, another manufacturer within the company or an external customer.

  The external customer may be an external supplier who processes the metal plate, that is, another external manufacturer, or an end consumer.

  The metal plate is processed by another manufacturer in the company or by an external customer (including another external manufacturer), and passed to the final consumer.

  Alternatively, it may be processed through more than one of them and passed to the final consumer.

  In some cases, the manufacturer himself.

  Hereinafter, for the convenience of explanation, the case of a customer will be described as a representative.

  If only one side of the metal plate should be free of surface defects, patterns, uneven luster, etc., ie the metal plate that the manufacturer should guarantee the quality of one side If there is an order, it means that when the metal plate is passed through a customer's line (for example, shear line 200 in FIG. 11), the surface on which the quality of the metal plate is to be guaranteed is either front or back. It is important whether it comes to the customer's side, and whether or not it matches the customer's request for quality assurance.

  And whether the front or back side of the line where the metal plate of the manufacturer is to be processed is on the front or back side of the customer's line depends on the manufacturer, customer, It depends on the relationship between the specifications of both lines.

  Here, for example, if the customer is another manufacturer and the front side of the product after the metal plate can processing is visible to the final consumer, the side that wants to guarantee quality is In terms of the principle and arrangement of the machine for can manufacturing, the front side in the state after the can manufacturing process, the back side in the state where the metal plate is passed through the shear line 200 of the customer as shown in FIG. It is assumed that the manufacturer's metal plate is always determined to be the back side when it is wound on the line to be processed.

  Suppose that the manufacturer now knows that.

  In other words, if one or more of surface defects, patterns, gloss unevenness, etc. are only on one side, after the metal plate is processed by the customer, the surface is processed by the customer. Suppose you knew which side of the product would be inconvenient for the customer.

  If you don't know, you can ask the customer if you can, or make an estimate based on experience. Alternatively, when quality information is shared online with another manufacturer and / or customer as in the fourth aspect of the present invention described later, Based on the shared information about the front and back plate surfaces of the metal plate, it may be determined whether or not it is necessary to reverse the front and back surfaces of the metal plate during the production of the metal plate.

  In the present invention, “predicting whether the surface whose quality is to be guaranteed is front or back” means the above.

  In the present invention, based on such a predicted result, the front and back surfaces of the metal plate are reversed during the production of the metal plate, if necessary.

  How to do this specifically will be described below.

  Now, at the stage where the cold rolling shown in FIG. 9 is completed, it is assumed that one or more of surface defects, patterns, uneven gloss, etc. appear only on one side of a certain metal plate.

  And when the metal plate follows the original manufacturing process, after annealing by the continuous annealing line 400 shown later in FIG. 7, surface treatment (plating) by the electric tin plating line 100 shown in FIG. 10 is performed. Suppose that it was supposed to pass.

  Incidentally, FIG. 10 shows the surface treatment (plating) portion extracted from FIG. 9, which is the same as that shown in FIG.

  Furthermore, in addition to the continuous annealing line 400 shown in FIG. 7, the electric tin plating line 100 shown in FIG. 10 also has a precise state when the front end of the metal plate is unwound. It is assumed that the direction of rotation that is commonly used and the direction of rotation that is commonly used when winding up the tip of the metal plate when the tip of the metal plate is unwound are determined. This is the direction of rotation when winding the leading end of the metal plate or unwinding the leading end of the metal plate, which was originally intended in the second and third aspects of the present invention described later.

  The direction of rotation when the front end of the metal plate is unwound is different from the direction shown in FIG. 1 (a) or the direction shown in (b), and the front end of the metal plate is wound up. The direction of rotation at that time is different from the direction shown in FIG. 2 (a) or the direction shown in (b).

  Now, assuming that the direction of rotation when the tip of the metal plate is unwound and the direction of rotation when the tip of the metal plate is wound up are determined, only the surface of the metal plate has surface wrinkles, patterns, and uneven brightness. Therefore, the manufacturer can predict in advance whether or not the surface on which the surface appears should be the surface on which the manufacturer should guarantee the quality.

  When the predicted result is a surface on which the manufacturer should guarantee the quality, in the present invention, the front and back surfaces of the metal plate are reversed during the production of the metal plate.

  When it is necessary in the present invention, it has the above meaning.

  The relationship is specifically shown in Table 1.

  When the manufacturer processes the metal plate according to the direction of rotation when winding the tip of the metal plate, or when the tip of the metal plate is unwound, according to the original manufacturing process, The surface on which one or more of the patterns, uneven gloss, etc. (surface defects) appears is either the front or the back of the customer's line. It depends on the specification. If the side of the customer that comes to the line matches the side where the manufacturer should guarantee the quality, the command set should be routed through the production stage that was not scheduled to pass through, as will be described later. It is adjusted so that the front and back surfaces of the metal plate are reversed, or the front and back surfaces of the metal plate are reversed without adjustment as in the second and third aspects of the present invention described later. If the surface of the customer's line that comes to the line does not match the surface that the manufacturer should guarantee quality of, it will not be reversed.

  The above determination is preferably performed within the business computer 90 (which may or may not be common to all manufacturing processes), but may be performed within the process computer 80 or the control device 70. Well, not necessarily limited. Alternatively, the operator may make a judgment intentionally.

  In order to invert the front and back surfaces of a metal plate, the metal plate, for example, a manufacturing stage that was not scheduled to pass when the original manufacturing process, such as skin pass 45 shown in FIG. In addition to adjusting the command set to go through the line that should handle the metal plate that was not originally scheduled to pass, the direction of rotation when winding the tip of the metal plate was originally planned And vice versa.

  In the middle of the manufacturing process according to the present invention, as described above, in addition to the case where the metal plate that was not originally intended to pass is routed through a line to be processed, the second and second described below will be described. As in the case of the third aspect of the present invention, this also includes the case where a metal plate originally intended to pass is a line to be processed.

(Second invention)
In the present invention, when following the original manufacturing process, the direction of rotation when winding up the tip of the metal plate in the line that should have been processed, which was originally supposed to pass through, is originally planned. It is also preferable to reverse the above.

  That is, for example, the electrotin plating line 100 shown in FIG. 10 described above is a line that is supposed to pass through and should be processed, and further, the electroplating line 100 is wound with the metal plate S. If the take-up reel mechanism is compatible, the direction of rotation when winding the tip of the metal plate S may be reversed from that originally planned. This second aspect of the present invention does not require adjustment of the instruction set so as to pass through a line to be processed for a metal plate that was not originally scheduled to pass through, as in the first aspect of the present invention. The production efficiency is not reduced and the manufacturing cost is not increased.

  In the first invention and the second invention, when the direction of rotation when winding the tip of the metal plate S is reversed from the originally planned direction, the belt wrapper 65 shown in FIG. As shown in a) and (b), the direction of rotation when winding the tip of the metal plate S can be changed as shown in FIGS. 2 (a) and 2 (b).

  That is, in order to change the direction of rotation when winding the tip of the metal plate S, the position where the tip of the metal plate S is introduced is changed to either (a) or (b) in FIG. The direction of rotation of the reel 61, the belt 62, etc. may be changed, but this may be automatic or by a forward / reverse operation manually performed by the operator.

(Third invention)
In the present invention, when following the original manufacturing process, the direction of rotation when the tip of the metal plate is unwound in the line to be processed, which was originally supposed to pass through, is originally planned. It is also preferable to reverse the situation.

  In the second aspect of the present invention, the winding was simply replaced by unwinding, and if the mechanism of the unwinding reel for unwinding the metal plate was compatible, the original passage was scheduled. What is necessary is just to reverse the direction of rotation at the time of unwinding the front-end | tip of a metal plate in the line which should process a metal plate as originally planned. The third aspect of the present invention does not require adjustment of the instruction set so as to pass through a line to be processed for a metal plate that was not originally intended to pass through unlike the first aspect of the present invention. The production efficiency is not reduced and the manufacturing cost is not increased.

  In order to do so, as shown in FIG. 5, the metal plate wound in a coil shape is either (a) rotated 180 ° in the horizontal plane, or (b) reversed upside down. The direction of rotation when unwinding the tip of the metal plate is reversed by the method from what was originally planned, and then loaded on the unwinding reel 10.

(Fourth Invention)
In the present invention, when quality information is shared online between a manufacturer and another manufacturer and / or customer, the front and back of the metal plate at another manufacturer and / or customer is shared. It is also preferable to determine whether or not it is necessary to reverse the front and back surfaces of the metal plate during the production of the metal plate based on shared information about the plate surface.

  For this purpose, for example, a method described in Patent Document 2 may be combined with the method of the present invention.

  Whether the front or back side of the line to be processed by the manufacturer's metal plate is on the front or back side of another manufacturer and / or customer's line It depends on the relationship between the specifications of both the customer and the customer. It is derived from the quality information shared online between the manufacturer and another manufacturer and / or customer.

  The quality information referred to in the present invention includes information on the relationship between the specifications of the manufacturers, customers, and both lines.

(Fifth Invention)
In the present invention, when the surface defect detected by the surface defect meter that detects the surface defect installed in the line for processing the metal plate is only on one side of the metal plate, the surface with the surface defect is It is also preferable not to be on the side where quality is to be guaranteed.

  For this purpose, for example, a method described in Patent Document 3 may be combined with the method of the present invention.

  There is also an order from the customer that will allow even one or more of surface defects, patterns, uneven luster, etc., only on the side opposite to the surface that should guarantee quality.

  All other qualities are good for applications that only need to guarantee the quality of one side, as it can be applied with a metal plate with one or more of surface defects, patterns, uneven luster, etc. only on the opposite side There is an economic advantage that it is not necessary to scrap metal plate products.

  As described above, the embodiment of the present invention is not limited to the above-described embodiment.

  For example, the line for surface treatment (plating) that appears in FIG. 9 is an electrotin plating line, but as a line to which the present invention can be applied, in addition to the skin pass as shown in FIG. 3, as shown in FIG. Any continuous line galvanizing line 300, continuous annealing line 400 as shown in FIG. 7, pickling line 500 as shown in FIG. 8, etc. There may be.

  Further, the present invention can be applied only when the customer has a line such as the shear line 200 shown in FIG. 11 and the manufacturer delivers a metal plate wound in a coil shape. Not exclusively.

  Even when a manufacturer shears a metal plate into a cut plate shape and directly processes the cut plate metal plate with a customer's can-making machine or press machine, the manufacturer's metal plate is processed. Whether the front or back side of the line to be placed will be on the front or back side of the customer's line depends on the specifications of the manufacturer, customer, and both lines. There is no.

  Therefore, even in such a case, the present invention can be similarly applied.

Diagram for explaining an embodiment of the present invention Diagram for explaining an embodiment of the present invention Diagram for explaining an embodiment of the present invention Diagram for explaining an embodiment of the present invention Diagram for explaining an embodiment of the present invention Diagram for explaining another embodiment of the present invention Diagram for explaining another embodiment of the present invention Diagram for explaining another embodiment of the present invention Diagram for explaining the background art Diagram for explaining electric tin plating line Diagram for explaining shearline

Explanation of symbols

10 Unwinding reel (payoff reel)
11 Leveler 12 Surface Defect Meter 15 Shear 20 Welding Machine 30 Annealing Furnace 40 Pot 45 Skin Pass 50 Cutting Machine 60 Take-up Reel (Tension Reel)
61 reel 62 belt 63 deflector roll 65 belt wrapper 70 control device 80 process computer 90 business computer 100 electric tin plating line 200 shear line 300 continuous hot dip galvanizing line 400 continuous annealing line 500 pickling line A transport direction S metal plate

Claims (5)

When the manufacturer follows the original manufacturing process for the metal plate whose quality should be guaranteed on one side, it is predicted whether the surface whose quality should be guaranteed is front or back. A method for producing a metal plate that should guarantee the quality of one side, wherein the front and back surfaces of the metal plate are reversed during production. If the original manufacturing process was followed, the line that was originally intended to pass through the line to be processed, and the direction of rotation when winding the tip of the metal plate was originally planned. 2. The method for producing a metal plate according to claim 1, wherein the quality of one side is guaranteed. When originally following the original manufacturing process, the direction of rotation when the metal plate was unwound in the line where the metal plate was originally intended to be processed was originally planned. The manufacturing method of the metal plate which should guarantee the quality of the single side | surface of Claim 1 characterized by the above-mentioned. When sharing quality information online between a manufacturer and another manufacturer and / or customer, the front and back plate surfaces of the metal plate at another manufacturer and / or customer The single side according to any one of claims 1 to 3, wherein it is determined whether or not it is necessary to reverse the front and back surfaces of the metal plate during the production of the metal plate based on shared information. Metal plate manufacturing method that should guarantee the quality of. When a surface defect detected by a surface defect meter that detects surface defects is installed on a line for processing the metal plate, the surface on which the surface defect exists is a quality surface. The method for producing a metal plate for which the quality of one side is to be guaranteed according to any one of claims 1 to 4, characterized in that:

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