JPH084816B2 - Method and apparatus for designing manufacturing conditions of shaped steel - Google Patents

Description

TECHNICAL FIELD The present invention relates to automatic design of manufacturing conditions for steel products.

[Prior Art] Steel has been the most widely used material, and product specifications with various contents depend on the usage pattern.
The user requests the manufacturer in the form of order details. Therefore, steel manufacturers need to design manufacturing conditions for order specifications of individual products.

Although there are very difficult points regarding the design of manufacturing conditions, it is very important for manufacturers to provide reliable design in a short period of time in terms of customer service.

Systems that assist in the design of this type of manufacturing condition have existed and are in actual use. That is, this system is a combination of a database relating to past manufacturing results and a device for searching the database for data matching the details of the order.

When the order specification condition exactly matches the retrieved past manufacturing record, it is used for manufacturing condition design.
For example, when the order specification condition matches the catalog size, there is past data matching the catalog size, and therefore the system search result greatly contributes to the design of the manufacturing condition.

[Problems to be Solved by the Invention] However, when the order specification condition required by the user from the manufacturer is different from the catalog size, it is extremely rare that it completely matches the past production record. is there. In such a case, the conventional search system is useless except that it can be used by the expert to find out the actual results of the similar order details, and the design of the manufacturing conditions is entirely dependent on the expert.

Further, in the case of designing by human thinking, it takes a long time to design, and the range that can be designed is limited if the degree of skill of an expert is low, so that the accuracy test is required more frequently in designing.

Therefore, an object of the present invention is to make it possible to automatically design manufacturing conditions for order specification conditions for which there is no matching actual record in the past.

[Means for Solving the Problems] In order to solve the above problems, in the method of the present invention, when designing the manufacturing conditions regarding the shape of the shaped steel having the web and the flange, the information of the required specifications is input, The past performance information is searched based on the information of the required specifications, and the performance information most similar to the required specifications with respect to the manufacturing difficulty regarding the web thickness, the flange thickness and the plate thickness ratio thereof is extracted, and the manufacturing conditions of the most similar performance are extracted. Then, the manufacturing conditions of the required specifications are designed based on the design rules for setting the manufacturing conditions for manufacturing the web thickness, the flange thickness and the plate thickness ratio of the required specifications.

In the apparatus of the present invention, means for inputting required specification information; result database means for accumulating past performance information; past history information on the performance database means based on the required specification information inputted by the input means. A means for searching performance information and extracting performance information that is most similar to the required specifications regarding manufacturing difficulty regarding web thickness, flange thickness, and plate thickness ratio; and, from the manufacturing conditions of the most similar performance, required web thickness of the required specifications. , Including means for holding a design rule for setting a manufacturing condition for manufacturing the flange thickness and the plate thickness ratio, and based on the extracted record information and the design rule, the manufacturing condition of the required specification is automatically Design means for designing;

[Operation] In other words, in the present invention, regarding the scale of manufacturing difficulty, which is the most important index in terms of ensuring high reliability, past performance (manufacturing performance or study performance) similar to the required specifications (contents of order details) Is extracted, and the manufacturing conditions are designed based on this and a predetermined instrumentation rule.

For example, in the case of rolling H-section steel, the two factors of the flange thickness and the web thickness of the H-section steel have a large correlation with the manufacturing difficulty, and the plate thickness ratio (flange thickness / web thickness) also has a large manufacturing difficulty. Have a correlation. It is empirically known that the degree of influence on the degree of manufacturing difficulty increases in the order of plate thickness ratio, web thickness, and flange thickness. Therefore, based on these empirical rules, it is possible to extract a record of which the degree of manufacturing difficulty is similar to the required specifications. In addition, based on design rules of thumb and theory,
If the manufacturing conditions are designed based on the extracted results, highly reliable design results can be obtained.

[Embodiment] FIG. 2 shows the configuration of a manufacturing condition design system for carrying out the present invention. Referring to FIG. 2, the main body of the design system is composed of a computer unit 20, to which a sensor 26 arranged in a manufacturing facility 27 is connected. Computer unit 20 is CP
U (central processing unit) 21, keyboard 22, CRT (display device) 2
A printer 24 and a disk device 25 are provided.

FIG. 1 shows a configuration of typical software arranged on the memory (including the disk 25) of the computer unit 20 shown in FIG. This system constitutes an expert system, and as shown in FIG.
52, knowledge base 53 and database 54 are provided. The inference engine 52 performs inference on predetermined processing target information based on the knowledge (rule) in the knowledge base 53 and the information in the database 54, and outputs the result. Input information from the keyboard 22 is input to the inference engine 52 via the user interface 51, and the processing result of the inference engine 52 is sent to the CRT 23 or the printer 24 via the user interface 51. The database 54 holds past information regarding manufacturing results, and stores a large amount of information. When the sensor 26 detects new manufacturing record information, the database update process 55 additionally registers the information on the record database 54.

This design system, to put it simply, provides similar actual data to the input required specifications in the actual database 54.
The manufacturing conditions are extracted from above, and the manufacturing conditions are designed based on the extracted performance data and a predetermined design rule. In order to execute this process, the knowledge base 53 has a similarity determination rule 53a.
And a design rule 53b.

The contents of the actual processing of the system of FIG. 2 are shown in FIG. The contents of each processing step will be described with reference to FIG.

Note that FIG. 3 shows the inference processing after the information on the required specifications is input from the keyboard, and in this example, the design of the rolling conditions in the manufacturing conditions is shown.

301: The performance database 54 is accessed, and it is determined whether or not there is a performance specification in which the plate thickness ratio has a value equal to or greater than the required specification value in the required specification series. If this condition is met
Go to 304, else go to 302.

302: The actual result database 54 is accessed, the actual result having the web thickness closest to the required web thickness is searched, and the actual result specifications extracted as a result are regarded as similar manufacturing actual results. When a plurality of actual results having the closest web thickness are extracted, data of a plurality of similar manufacturing actual results is held.

If there are a plurality of similar manufacturing results extracted in 303: 302, the result having the flange thickness closest to the required flange thickness is determined as the most similar manufacturing result. In one case, it is the most similar manufacturing record.

304: The actual result database 54 is accessed, and the actual results in which the plate thickness ratio is equal to or more than the value of the required specification are extracted, and the actual result having the web thickness closest to the required specification web thickness is set as the similar manufacturing actual result. When a plurality of actual results having the closest web thickness are extracted, data of a plurality of similar manufacturing actual results is held.

305: When there are a plurality of similar manufacturing results extracted in 304, the result having the flange thickness closest to the flange thickness of the required specification is determined as the most similar manufacturing result. In one case, it is the most similar manufacturing record.

306: Design manufacturing conditions based on the most similar manufacturing record and design rule (53b) determined in 303 or 305. actually,
The spring amount, finished web thickness, finished flange thickness, etc. are designed for each pass of each mill in the rolling mill. This design rule is registered in advance on the knowledge base. For example, the spring amount for each pass of each mill of the rolling equipment is designed using the following equation.

VSP = reaction force of most similar manufacturing results / mill rigidity value VSP: horizontal spring amount for each rolling mill and each pass Although the H-section steel has been described in this embodiment, for example, in the case of CT (Cut T) section steel as well, the web is also used. Since there is a flange and a flange, it is possible to deal with the design of manufacturing conditions by the same processing as this embodiment.

[Effects of the Invention] As described above, according to the present invention, performance information similar to required specifications regarding manufacturing difficulty is extracted and manufacturing conditions are designed based on it, so that a highly reliable design can be automatically performed in a short time. Can be done to.

[Brief description of drawings]

FIG. 1 is a block diagram showing the arrangement of software on the memory of the computer unit 20 shown in FIG. FIG. 2 is a block diagram showing the configuration of the system of the embodiment. FIG. 3 is a flowchart showing the operation of the system shown in FIG. 20: Computer unit 21: CPU, 22: Keyboard 23: CRT, 24: Printer 52: Inference engine, 53: Knowledge base 53a: Similarity determination rule 53b: Design rule 54: Results database

Claims (2)

[Claims] 1. When designing manufacturing conditions relating to the shape of a shaped steel having a web and a flange, information on required specifications is input, past performance information is searched based on the information on the required specifications, and web thickness, flange In order to manufacture the required web thickness, flange thickness, and plate thickness ratio from the most similar actual manufacturing conditions by extracting the most similar actual result information regarding the manufacturing difficulty regarding the thickness and its plate thickness ratio. A method for designing manufacturing conditions for shaped steel, which designs manufacturing conditions of required specifications based on design rules that set manufacturing conditions. 2. A means for inputting requirement specification information; a performance database means for accumulating past performance information; a past performance information on the performance database means based on the requirement specification information inputted by the input means. Means for searching and extracting record information that is most similar to the required specification regarding manufacturing difficulty regarding web thickness, flange thickness, and plate thickness ratio thereof; and, from the most similar record manufacturing conditions, required web thickness of the required specification,
A means for holding a design rule for setting a manufacturing condition for manufacturing the flange thickness and the plate thickness ratio is included, and the manufacturing condition of the required specification is automatically designed based on the extracted record information and the design rule. A designing device for manufacturing a shaped steel, which comprises: