Manufacturing cost calculation device, manufacturing cost calculation method, and manufacturing cost calculation program

Abstract

To properly calculate production costs of thermally pressed steel, conforming with specification requirements of the thermally pressed steel, in a short time.SOLUTION: A production cost calculation device comprises: a shape specification part which specifies an actual result image similar to a request image included in request specification of thermally pressed steel; an actual result specification part which specifies actual result information including a size of a cross section having a small deviation from a size of a cross section included in the request specifications among pieces of actual result information stored in a memory associatively with the specified actual result image; a production condition specification part which specifies production conditions of the thermally pressed steel based upon the request specifications; a calculation part which calculates production costs including raw material costs and tool costs; and a generation part which generates display data for displaying the calculated production costs.SELECTED DRAWING: Figure 11

Description

[Technical field]

[0001] The present disclosure relates to a manufacturing cost calculation device, a manufacturing cost calculation method, and a manufacturing cost calculation program for calculating the manufacturing cost of hot-stamped steel. [Background technology]

[0002] The hot extrusion method, in which heat and pressure are applied to a billet of material and it is extruded through holes in a tool according to the cross-sectional shape of the final product to produce hot-extruded steel, makes it possible to produce steel products with complex cross-sectional shapes that are difficult to produce using other methods such as rolling.

[0003] When receiving an inquiry for hot-stamped steel from a customer, it is preferable to quickly reply whether hot-stamped steel can be manufactured according to the specifications required by the customer and the manufacturing cost. Patent Document 1 describes a method of calculating and displaying the delivery date of a new order based on past manufacturing performance data. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2008-165723 A Summary of the Invention [Problem to be solved by the invention]

[0005] Since the manufacturing cost of products with uniform cross-sectional shapes such as steel plates and steel pipes can be calculated relatively easily, the time required to judge whether a product can be manufactured and to calculate the manufacturing cost to be responded to by the customer largely depends on the availability of materials and the calculation of the delivery date. On the other hand, hot-extruded steel produced by the hot extrusion method has various cross-sectional shapes, and the manufacturing difficulty and manufacturing cost vary depending on the cross-sectional shape. In general, the more complex the cross-sectional shape of the hot-extruded steel, the higher the manufacturing cost. Therefore, in order to receive an inquiry order, it is necessary to present the manufacturing cost to the customer as soon as possible, but it has not been easy to estimate the manufacturing cost appropriately in a short time.

[0006] Therefore, the present disclosure aims to provide a manufacturing cost calculation device, a manufacturing cost calculation method, and a manufacturing cost calculation program that can appropriately calculate the manufacturing cost of hot-extruded steel in accordance with the required specifications of the hot-extruded steel in a short period of time. [Means for solving the problem]

[0007] The manufacturing cost calculation device according to the present disclosure includes a shape identification unit that identifies one or more actual images similar to the required image from multiple actual images that represent the cross-sectional shapes of multiple hot-extruded steel pieces that have been manufactured and are stored in a memory, based on a required image that represents the cross-sectional shape of the hot-extruded steel, and a required image included in a required specification including the cross-sectional size, the length of a single piece, the number of pieces, and the steel type; an actual result identification unit that identifies actual result information corresponding to each of the identified one or more actual images and stored in the memory in association with the identified one or more actual images, the actual result information including a cross-sectional size that deviates from the cross-sectional size included in the required specification by less than a predetermined size deviation threshold; a manufacturing condition identification unit that identifies manufacturing conditions including the diameter, length, and number of billets used to manufacture the hot-extruded steel pieces according to the required specifications, based on the required specifications; a calculation unit that calculates a manufacturing cost including a material cost calculated based on the identified manufacturing conditions and a tool cost calculated based on the tool unit cost included in the identified actual result information; and a creation unit that creates display data for displaying the calculated manufacturing cost.

[0008] In the manufacturing cost calculation device of the present disclosure, it is preferable that the manufacturing condition determination unit determines the manufacturing conditions so that the length of the portion of the extruded hot-extruded steel stored in memory, excluding the trimming allowance indicating the length of the portion to be trimmed, is longer than the single-item length included in the required specifications.

[0009] In the manufacturing cost calculation device of the present disclosure, the tool unit included in the performance information is a tool unit indicating the cost of the tool per extrusion, and the manufacturing condition identification unit identifies the manufacturing conditions so that the remaining portion after obtaining a predetermined number of hot-stamped steel pieces from the portion excluding the trimming allowance is small, and it is preferable that the calculation unit calculates the manufacturing cost so as to include an amount obtained by multiplying the tool unit by the number of billets as the tool cost.

[0010] In the manufacturing cost calculation device disclosed herein, the multiple pieces of actual information stored in the memory further include the cross-sectional area of ​​the hot-stamped steel that has a manufacturing history, and it is preferable that the actual identification unit identifies, from the multiple pieces of actual information stored in the memory, actual information including a cross-sectional area whose deviation from the cross-sectional size included in the required specifications is smaller than a predetermined size deviation threshold, and whose deviation from the cross-sectional area calculated based on the required image and the cross-sectional size is smaller than a predetermined area deviation threshold.

[0011] In the manufacturing cost calculation device of the present disclosure, the multiple pieces of actual information stored in the memory further store a finishing efficiency indicating the finishing weight per unit time for finishing the extruded hot-extruded steel, and the calculation unit sets a unit variable cost incurred according to the production volume of the hot-extruded steel, including a finishing variable cost that is set to become smaller the higher the finishing efficiency included in the identified actual information, and a fixed cost that is incurred in producing the hot-extruded steel regardless of the production volume, calculates the variable cost by multiplying the unit variable cost by the production volume of the hot-extruded steel, and preferably calculates the manufacturing cost further including the variable cost and the fixed cost.

[0012] In the manufacturing cost calculation device according to the present disclosure, it is preferable to further include a determination unit that determines whether or not a shape feature value calculated from the cross-sectional shape and the size of the cross-section shown in a required image included in the required specifications satisfies a manufacturing standard stored in memory for each steel type.

[0013] In the manufacturing cost calculation device according to the present disclosure, it is preferable that the determination unit further determines whether or not the area of ​​the cross section calculated based on the required image and the size of the cross section included in the required specifications satisfies the manufacturing standard.

[0014] In the manufacturing cost calculation device of the present disclosure, when it is not possible to manufacture hot-stamped steel in accordance with the required specifications, it is preferable that the creation unit generates an alternative requested image by modifying the required image so that it satisfies the manufacturing criteria, and creates display data including the generated alternative requested image.

[0015] The manufacturing cost calculation method disclosed herein includes: identifying one or more actual images similar to the required image from multiple actual images representing the cross-sectional shapes of multiple hot-extruded steels that have been manufactured and stored in a memory, based on a required image representing the cross-sectional shape of the hot-extruded steel, and a required image included in a required specification including the cross-sectional size, the length of a single item, the number, and the steel type; identifying actual information corresponding to the one or more identified actual images and stored in the memory in association with each of the identified one or more actual images, the actual information including a cross-sectional size that deviates from the cross-sectional size included in the required specification by less than a predetermined size deviation threshold; identifying manufacturing conditions including the diameter, length, and number of billets used to manufacture the hot-extruded steel in accordance with the required specification, based on the required specification; calculating a manufacturing cost including a material cost calculated based on the identified manufacturing conditions and a tool cost calculated based on the tool unit cost included in the identified actual information; and creating display data for displaying the calculated manufacturing cost.

[0016] The manufacturing cost calculation program disclosed herein causes a computer to execute the following operations: based on a required image showing the cross-sectional shape of the hot-extruded steel, and a required image included in a required specification including the cross-sectional size, the length of a single item, the number, and the type of steel, identify one or more actual images similar to the required image from multiple actual images showing the cross-sectional shapes of multiple hot-extruded steels that have been manufactured and stored in a memory; identify actual information corresponding to each of the identified one or more actual images stored in the memory in association with the one or more identified actual images, the actual information including a cross-sectional size whose deviation from the cross-sectional size included in the required specification is smaller than a predetermined size deviation threshold; based on the required specification, identify manufacturing conditions including the diameter, length, and number of billets used to manufacture the hot-extruded steel in accordance with the required specification; calculate manufacturing costs including material costs calculated based on the identified manufacturing conditions and tool costs calculated based on the tool unit cost included in the identified actual information; and create display data for displaying the calculated manufacturing costs. Effect of the Invention

[0017] The manufacturing cost calculation device according to the present disclosure can appropriately calculate the manufacturing cost of hot-stamped steel in a short time in accordance with required specifications based on the manufacturing track record of hot-stamped steel. [Brief description of the drawings]

[0018] [Figure 1] FIG. 1 is a schematic diagram showing a schematic configuration of a computer. [Diagram 2] FIG. 4 is a diagram illustrating an example of data stored in a memory. [Diagram 3] FIG. 13 is a diagram showing an example of a manufacturing standard. [Figure 4] 1A and 1B are diagrams illustrating the relationship between manufacturing standards and cross-sectional shapes. [Diagram 5] FIG. 11 is a diagram illustrating an example of performance information. [Figure 6] FIG. 2 is a functional block diagram of a processor included in the computer. [Figure 7] 13 is a first example of a manufacturing cost calculation screen. [Figure 8] 13 is an example of a cross-sectional shape input screen. [Figure 9] 2 is a second example of a manufacturing cost calculation screen. [Figure 10] 13A is a third example of a manufacturing cost calculation screen, and FIG. 13B is a fourth example of a manufacturing cost calculation screen. [Figure 11] 11 is a process flowchart of a manufacturing cost calculation method. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, a manufacturing cost calculation device capable of efficiently calculating the manufacturing cost of hot-stamped steel according to required specifications based on the manufacturing record of hot-stamped steel will be described in detail with reference to the drawings. However, it should be understood that the present invention is not limited to the drawings or the embodiments described below.

[0020] The manufacturing cost calculation device receives input of required specifications for the hot-stamped steel, and creates display data for displaying the manufacturing cost of the hot-stamped steel according to the required specifications. The required specifications include a required image showing the cross-sectional shape of the hot-stamped steel to be manufactured, information indicating the cross-sectional size, the length of each piece, the number of pieces, and the steel type. The manufacturing cost calculation device identifies manufacturing records associated with shapes similar to the cross-sectional shape of the hot-stamped steel included in the required specifications, and calculates the manufacturing cost of the hot-stamped steel using the required specifications and the manufacturing records.

[0021] FIG. 1 is a schematic diagram showing a schematic configuration of a computer.

[0022] A computer 1, which is an example of a manufacturing cost calculation device, includes an input / output interface 11, a memory 12, and a processor 13.

[0023] The input / output interface 11 has an interface circuit for receiving data to be processed by the computer 1 or outputting data processed by the computer 1. The input / output interface 11 includes, for example, a communication interface circuit for connecting the computer 1 to a communication network, or a peripheral device interface circuit for connecting the computer 1 to various peripheral devices such as a keyboard, a mouse, and a display. The input / output interface 11 receives input of required specifications from a terminal device via the communication interface circuit, or from an input device such as a keyboard or a mouse via the peripheral device interface circuit. The input / output interface 11 also outputs display data for displaying the manufacturing cost to the terminal device via the communication interface circuit, or to a display via the peripheral device interface circuit.

[0024] The memory 12 includes, for example, at least one of a semiconductor memory, a magnetic disk device, and an optical disk device. The memory 12 stores various programs used in processing by the processor 13, data, a parameter group for defining a convolutional neural network, and the like. The various programs include a driver program, an operating system program, and a manufacturing cost calculation program. The various programs may be provided in a form recorded on a computer-readable portable recording medium such as a semiconductor memory, a magnetic recording medium, or an optical recording medium.

[0025] FIG. 2 is a diagram showing an example of data stored in the memory 12. As shown in FIG.

[0026] The memory 12 stores the following data: manufacturing standards 121, size deviation thresholds 122, a steel type specification list 123, a billet specification list 124, billet diameter-container diameter correspondence 125, cutoff allowance information 126, and performance information 127.

[0027] FIG. 3 is a diagram showing an example of the manufacturing standard 121.

[0028] The scale 12 indicates, as manufacturing criteria 121, the circumscribed circle diameter D (mm), thickness T (mm), corner r (convex) (mm), corner R (concave) (mm), and cross-sectional area A (mm 2 ) are stored. Either the upper limit value or the lower limit value for each value may be stored, or both may be stored.

[0029] FIG. 4 is a diagram for explaining the relationship between the manufacturing standard 121 and the cross-sectional shape.

[0030] In a manufacturable hot-stamped steel cross section 20, the circumscribing circle diameter D indicates the diameter of a circle circumscribing the cross section 20. The thickness T indicates the vertical length of the area occupied by the continuous hot-stamped steel from one side of the hot-stamped steel to the other side. The corner r indicates the radius of curvature of the curved surface where the hot-stamped steel is convex. The corner R indicates the radius of curvature of the curved surface where the hot-stamped steel is concave. The cross-sectional area A indicates the area of ​​the cross section 20.

[0031] The size deviation threshold 122 indicates an upper limit of the size deviation for identifying performance information including a cross-section size that has a small deviation from the cross-section size included in the required specifications.

[0032] The size of the cross section is, for example, the diameter of a circumscribing circle of the cross section. The size of the cross section may also be the horizontal or vertical length of the cross section. The size deviation is expressed as a percentage (%) of the difference between the cross section size included in the requirement specifications and the cross section size included in the performance information relative to the cross section size included in the requirement specifications. The size deviation may also be expressed as the difference (mm) between the cross section size included in the requirement specifications and the cross section size included in the performance information.

[0033] The steel type specification table 123 lists the specific gravity (g / cm3), which represents the weight per volume, for each steel type that can be used to manufacture hot-formed steel. 3 ) and the material price (yen / kg), which represents the price per weight, are associated with it.

[0034] The billet specification list 124 shows the specifications of billets that can be used to manufacture hot-stamped steel. The billet specification list 124 stores the diameter (mm), length (mm), and steel type of each billet.

[0035] The billet diameter-container diameter correspondence 125 indicates the relationship between the diameter of a billet, which is a steel material extruded by applying heat and pressure, and the inner diameter of a container, which is a vessel that accommodates the billet and applies heat and pressure to the billet. In the billet diameter-container diameter correspondence 125 shown in Fig. 2, a lower limit (mm) and an upper limit (mm) of the diameter of the billet that can be accommodated in the container are stored in association with a container having a predetermined inner diameter (mm).

[0036] The trimming allowance information 126 indicates the length (mm) of the portion to be trimmed out of the hot-extruded steel extruded in one hot extrusion. The trimming allowance information 126 may be set for each steel type, each billet, or each container diameter.

[0037] FIG. 5 is a diagram showing an example of the performance information 127.

[0038] The performance information 127 includes a plurality of performance images showing the cross-sectional shapes of a plurality of hot-stamped steel pieces that have been manufactured, and the size (mm) of the cross-section of the hot-stamped steel pieces that have been manufactured. 2 ), the precision adjustment efficiency in the manufacturing process, and the tool cost, which is the cost of the tools used in the manufacturing process, are stored.

[0039] The finishing efficiency indicates the efficiency of finishing hot-extruded steel extruded by hot extrusion into a shippable product. For example, the weight of hot-extruded steel finished per unit time (kg / H) is used as the finishing efficiency.

[0040] The tool cost includes the unit price of the tool (yen) and the tool unit cost (yen / time) indicating the cost of the tool per extrusion by the hot extrusion method.

[0041] The processor 13 includes one or more processors and their peripheral circuits. The processor 13 is a processing circuit that comprehensively controls the overall operation of the computer 1, and is, for example, a CPU (Central Processing Unit). The processor 13 controls the operation of the input / output interface 11, etc., so that various processes of the computer 1 are executed by appropriate means based on the programs, etc. stored in the memory 12. The processor 13 executes processes based on the various programs stored in the memory 12. The processor 13 can also execute a plurality of various programs in parallel.

[0042] The processor 13 has a determination unit 131, a shape specification unit 132, a performance specification unit 133, a manufacturing condition specification unit 134, a calculation unit 135, and a creation unit 136. Each of these units in the processor 13 is a functional module implemented by a program executed on the processor in the processor 13. Alternatively, each of these units in the processor 13 may be implemented in the computer 1 as an independent integrated circuit, a microprocessor, or firmware. It is noted that the processor 13 does not need to have the determination unit 131.

[0043] The judgment unit 131 calculates a shape characteristic value from the cross-sectional shape and cross-sectional size shown in the required image included in the required specifications, and judges whether the calculated shape characteristic value satisfies the manufacturing standard 121 stored in the memory 12 for each steel type.

[0044] FIG. 7 is a first example of a manufacturing cost calculation screen.

[0045] The processor 13 of the computer 1 creates display data for displaying the manufacturing cost calculation screen 30, and outputs the data via the input / output interface 11 to a terminal device or a display.

[0046] The manufacturing cost calculation screen 30 accepts input of required specifications. By requesting manufacturing cost calculation after inputting the required specifications, the manufacturing cost calculation screen 30 displays the manufacturing cost. Fig. 7 shows the manufacturing cost calculation screen before accepting input of the required specifications.

[0047] The manufacturing cost calculation screen 30 has a cross-sectional shape input screen display button 301 , a cross-sectional shape display field 302 , a specification input field 303 , a manufacturing cost calculation button 304 , and a manufacturing cost display field 305 .

[0048] The cross-sectional shape input screen display button 301 is a button for requesting the display of a cross-sectional shape input screen. The computer 1 creates and outputs a cross-sectional shape input screen in response to the operation of the cross-sectional shape input screen display button 301. The cross-sectional shape input screen is a screen for inputting the shape of the cross section of the hot-pressed steel, and will be described in detail later.

[0049] The cross-sectional shape display field 302 is a field in which the cross-sectional shape inputted using the cross-sectional shape input screen is displayed.

[0050] The specification input field 303 is a field for inputting specifications other than the cross-sectional shape among the required specifications. In the example of FIG. 7, the specification input field 303 is provided with areas for inputting the cross-sectional size, length, number, and steel type. The cross-sectional size is the circumscribing circle diameter (mm) of the cross-section. The cross-sectional size may also be the horizontal or vertical length of the cross-section. The length is the length (mm) of the hot-stamped steel to be manufactured, and the number is the number of the hot-stamped steel pieces. The specification input field 303 is configured so that the total length (mm) of the hot-stamped steel to be manufactured is input as the length, and the input area for the number may be omitted.

[0051] For items in the specification input field 303 that are specified by numerical values, such as cross-sectional size, length, and quantity, the numerical values ​​may be entered directly, or the desired numerical value may be specified by pressing an increase / decrease button.

[0052] In the specification input field 303, for an item specified by a character string, such as the steel type, the character string may be input directly, or the character string may be input by selecting from a selection list displayed by pressing a list display button. Also, the character string may be specified by a code that is previously assigned to the specified character string.

[0053] The manufacturing cost calculation button 304 is a button for requesting the calculation of the manufacturing cost corresponding to the input required specifications.

[0054] The manufacturing cost display field 305 is a field that displays the manufacturing cost calculated in response to pressing the manufacturing cost calculation button 304. The manufacturing cost display field 305 displays the cost (yen) required to manufacture hot-stamped steel according to the required specifications, as well as the cost breakdown such as variable cost, fixed cost, material cost, and tool cost.

[0055] FIG. 8 is an example of a cross-sectional shape input screen.

[0056] The cross-sectional shape input screen 40 is displayed in response to pressing a cross-sectional shape input screen display button 301 included in the manufacturing cost calculation screen 30. The cross-sectional shape input screen 40 has an image import button 401, a template selection button 402, a free drawing button 403, a cross-sectional shape drawing field 404, an initialization button 405, and a completion button 406.

[0057] The image capture button 401 is a button for capturing an image captured by a camera as an image representing a cross-sectional shape. The camera is connected to a terminal device or computer 1 that displays a cross-sectional shape input screen 40. In response to pressing the image capture button 401, a capture screen (not shown) is displayed that has a display field that displays an image generated by the light receiving element of the camera and a capture button that instructs capture of the image displayed in the display field.

[0058] The template selection button 402 is a button for selecting a desired template as an image representing a cross-sectional shape from a plurality of templates prepared in advance as examples of cross-sectional shapes. In response to pressing the template selection button 402, a template selection screen (not shown) is displayed that displays a plurality of selectable templates.

[0059] The free drawing button 403 is a button for specifying a cross-sectional shape by drawing a figure freehand. In response to pressing the free drawing button 403, a drawing palette (not shown) for drawing a figure is displayed in a cross-sectional shape drawing field 404. The drawing palette has drawing buttons for placing objects such as straight lines, curves, rectangles, and circles at desired positions, an erase button for erasing a drawing at a desired position, and the like. Note that free drawing may be performed by using the free drawing button 403 on an image imported by the image import button 401 or a template selected by the template selection button 402.

[0060] The cross-sectional shape drawing field 404 is a field in which an image specified as a cross-sectional shape included in the required specifications is displayed. An image imported by the image import button 401 and a template selected by the template selection button 402 are displayed in the cross-sectional shape drawing field 404. In addition, free drawing by the free drawing button 403 is performed on the image displayed in the cross-sectional shape drawing field 404.

[0061] The Complete button 406 is a button for specifying the image displayed in the cross-sectional shape drawing field 404 as the cross-sectional shape included in the required specifications and completing the input of the cross-sectional shape. In response to pressing the Complete button 406, the cross-sectional shape input screen 40 is closed and the manufacturing cost calculation screen 30 is displayed again. In the cross-sectional shape display field 302 of the re-displayed manufacturing cost calculation screen 30, the image that was displayed in the cross-sectional shape drawing field 404 at the time the Complete button 406 was pressed is displayed.

[0062] FIG. 9 is a second example of the manufacturing cost calculation screen.

[0063] FIG. 9 shows the manufacturing cost calculation screen 31 after the input of required specifications has been received and before the manufacturing cost is calculated.

[0064] The manufacturing cost calculation screen 31 has a cross-sectional shape input screen display button 311 , a cross-sectional shape display field 312 , a specification input field 313 , a manufacturing cost calculation button 314 , and a manufacturing cost display field 315 .

[0065] The cross-sectional shape display field 312 displays the cross-sectional shape input on the cross-sectional shape input screen 40. The specification input field 313 displays values ​​input for required specifications other than the cross-sectional shape. The other parts are the same as those on the manufacturing cost calculation screen 30, so their explanations will be omitted.

[0066] The determination unit 131 may further determine whether or not the area of ​​the cross section calculated based on the required image and the size of the cross section included in the required specifications satisfies the manufacturing standard 121 .

[0067] The shape identification unit 132 inputs a required image included in the required specifications that satisfy the manufacturing standard 121 into a convolutional neural network, thereby identifying one or more actual images that are similar to the required image from the actual images included in the actual information 127 stored in the memory 12.

[0068] The shape identification unit 132 can use known neural networks such as VGG, YOLO (You Only Look Once), and SSD (Single Shot Detector) as the convolutional neural network. The convolutional neural network is trained in advance to identify an image similar to the input image from a plurality of images stored in advance by inputting training data to which a correct answer label has been assigned.

[0069] The shape specification unit 132 may specify one or more actual images similar to the requested image using other known methods. For example, the shape specification unit 132 performs local feature matching to calculate local features such as luminance changes of pixels included in the multiple actual images stored in the memory 12 and the input requested image. The shape specification unit 132 also calculates the number of points with similar features as the similarity between each of the multiple actual images and the requested image. Then, the shape specification unit 132 specifies the actual image in the pair whose similarity is greater than a predetermined similarity threshold as the actual image similar to the requested image.

[0070] The performance identification unit 133 identifies performance information 127 stored in the memory 12 in association with each of one or more performance images identified by the shape identification unit 132, including a cross-sectional size whose deviation from the cross-sectional size included in the required specifications is smaller than a size deviation threshold 122 stored in the memory 12.

[0071] Convolutional neural networks and local feature matching can detect objects regardless of the size of the object depicted in the image. On the other hand, in the production of hot extrusion steel by the hot extrusion method, even if the cross-sectional shape is similar, the difficulty and cost of production can vary depending on the cross-sectional size.

[0072] In the computer 1 of the present disclosure, the performance specification unit 133 further specifies the performance information specified by inputting the required image into a convolutional neural network or the like, by the size of the cross section. By operating in this manner, the computer 1 of the present disclosure can appropriately calculate the manufacturing cost of the hot-stamped steel in accordance with the required specifications in a short time based on the manufacturing performance of the hot-stamped steel.

[0073] The performance identification unit 133 may identify performance information, from among the multiple performance information 127 stored in the memory 12, that includes a cross-sectional size whose deviation from the cross-sectional size included in the required specifications is smaller than a size deviation threshold, and that includes a cross-sectional area whose deviation from the cross-sectional area is smaller than an area deviation threshold stored in the memory 12.

[0074] The area deviation threshold indicates an upper limit of the area deviation for identifying performance information including a cross-sectional area that has a small deviation from the cross-sectional area in the required specifications.

[0075] The area deviation is expressed as a percentage (%) of the difference between the cross-sectional area in the required specifications and the cross-sectional area in the actual information relative to the cross-sectional area included in the required specifications. The area deviation is the difference (mm 2 ) may also be represented as

[0076] The manufacturing condition determination unit 134 determines manufacturing conditions based on required specifications that satisfy manufacturing standards. The manufacturing conditions include the diameter, length, and number of billets used in manufacturing the hot-stamped steel.

[0077] The manufacturing condition specifying unit 134 calculates the area of ​​the cross section corresponding to the required specifications based on the required image and the size of the cross section included in the required specifications that satisfy the manufacturing criteria. The manufacturing condition specifying unit 134 first obtains the size and area of ​​the cross section in the required image displayed at a predetermined scale. The manufacturing condition specifying unit 134 can then obtain the area of ​​the cross section corresponding to the required specifications by dividing the area of ​​the displayed cross section by the ratio between the size of the cross section included in the required specifications and the size of the cross section in the displayed required image.

[0078] The manufacturing condition specifying unit 134 calculates the volume of one hot-stamped steel piece corresponding to the required specifications by multiplying the area of ​​the cross section corresponding to the required specifications by the piece length included in the required specifications.

[0079] If only one hot-stamped steel piece of a single length included in the required specifications can be produced from one billet, the manufacturing condition identification unit 134 selects a billet from the multiple billets in the billet specification list 124 stored in the memory 12 that corresponds to the volume of one single hot-stamped steel piece corresponding to the calculated required specifications and the steel type included in the required specifications.

[0080] The manufacturing condition specification unit 134 selects the billet with the smallest volume among billets of the steel type included in the required specifications and having a volume capable of producing the volume of hot-stamped steel corresponding to the calculated required specifications, and includes the diameter and length of the billet in the manufacturing conditions.

[0081] If multiple hot-extruded steel pieces of the single length included in the required specifications can be produced from one billet, the production condition identification unit 134 calculates the total volume of the maximum number of hot-extruded steel pieces that can be produced from one billet, selects the billet with the smallest volume among the billets with a volume that can produce hot-extruded steel pieces of that volume, and includes the diameter and length of that billet in the production conditions.

[0082] The manufacturing condition specifying unit 134 refers to the billet diameter-container diameter correspondence relationship 125 stored in the memory 12, and specifies the container diameter corresponding to the specified billet diameter.

[0083] The manufacturing condition identification unit 134 may refer to the trimming allowance information 126 stored in the memory 12 and select a billet so that the length of the hot-extruded steel produced by extruding the billet using a hot extrusion method, excluding the trimming allowance, is longer than the length included in the required specifications.

[0084] The manufacturing condition specification unit 134 may specify manufacturing conditions so that the remaining portion obtained after excluding the trimming allowance and obtaining the number of hot-stamped steel pieces included in the required specifications with a length included in the required specifications is small.

[0085] The calculation unit 135 calculates the manufacturing cost including the material cost and the tool cost.

[0086] The calculation unit 135 calculates the material cost by multiplying the volume of the billet, which is determined based on the diameter and length of the selected billet, by the material unit price corresponding to the steel type included in the required specifications identified by referring to the steel type specification list 123 stored in the memory 12.

[0087] The calculation unit 135 calculates the tool cost in the manufacturing cost based on the tool cost included in the identified performance information.

[0088] When hot-stamped steel according to the required specifications is manufactured by extrusion from one billet, the calculation unit 135 regards the tool unit cost included in the identified performance information as the tool cost in the manufacturing cost.

[0089] When hot-stamped steel according to the required specifications is manufactured by extrusion from multiple billets, the calculation unit 135 determines the tool cost in the manufacturing cost as the tool cost multiplied by the number of billets by the tool unit price included in the identified performance information.

[0090] When hot-stamped steel according to required specifications is manufactured by extrusion from multiple billets, the calculation unit 135 may determine the tool cost in the manufacturing cost as the tool unit cost included in the identified performance information multiplied by the number of billets.

[0091] The calculation unit 135 may calculate the manufacturing cost to include variable costs and fixed costs. Variable costs are costs that arise according to the production volume of hot-stamped steel, such as electricity consumption and water consumption. Fixed costs are costs that arise regardless of the production volume of hot-stamped steel, such as labor costs and fixed depreciation costs.

[0092] The calculation unit 135 sets a unit variable cost and a fixed cost, which are variable costs per unit production volume, including a refinement variable cost that is set to decrease as the refinement efficiency included in the identified performance information 127 increases. Then, the calculation unit 135 calculates a value obtained by multiplying the unit variable cost by the weight of the hot-stamped steel produced in accordance with the required specifications, as the variable cost.

[0093] The creation unit 136 creates display data for displaying whether or not hot-stamped steel can be manufactured in accordance with the required specifications, and, if hot-stamped steel can be manufactured in accordance with the required specifications, the calculated manufacturing cost.

[0094] If it is not possible to manufacture hot-stamped steel in accordance with the required specifications, the creation unit 136 may generate an alternative requested image by modifying the requested image so as to satisfy the manufacturing standard 121, and create display data including the generated alternative requested image.

[0095] The creation unit 136 detects portions of the requested image that are not satisfied by the conditions included in the manufacturing conditions 121, and generates a substitute requested image by modifying the requested image so as to satisfy the conditions.

[0096] FIG. 10(a) is a third example of the manufacturing cost calculation screen, and FIG. 10(b) is a fourth example of the manufacturing cost calculation screen.

[0097] FIG. 10(a) shows the manufacturing cost calculation screen 32 when the required specifications satisfy the manufacturing conditions, which is displayed in response to pressing the manufacturing cost calculation button 314 on the manufacturing cost calculation screen 32 shown in FIG.

[0098] The manufacturing cost calculation screen 32 has a cross-sectional shape input screen display button 321 , a cross-sectional shape display field 322 , a specification input field 323 , a manufacturing cost calculation button 324 , and a manufacturing cost display field 325 .

[0099] The manufacturing cost calculated by the calculation unit 135 is displayed in the manufacturing cost display field 325. The other parts are the same as those in the manufacturing cost calculation screen 31, so the explanation will be omitted.

[0100] FIG. 10(b) shows a manufacturing cost calculation screen 33 displayed in response to pressing the manufacturing cost calculation button 314 on the manufacturing cost calculation screen 32 shown in FIG. 9, in which the required specifications do not satisfy the manufacturing conditions.

[0101] In the manufacturing cost calculation screen 33, a manufacturing impossible message 34 is overlaid on the manufacturing cost calculation screen 31 on which the required specifications have been input. The manufacturing impossible message 34 has a text display area 341 and an alternative image display area 342.

[0102] A text indicating that the required specifications do not satisfy the manufacturing standards is displayed in the text display area 341. Also, a message recommending that the requested image be changed is displayed in the text display area 341.

[0103] The substitute image display area 342 displays the substitute requested image created by the creation unit 136. The manufacturing cost calculation screen 33 may be configured to display a manufacturing cost calculation screen with the substitute requested image as the requested image in response to an operation such as clicking on the substitute image display area 342. On the manufacturing cost calculation screen with the substitute requested image as the requested image, the manufacturing cost based on the substitute requested image is calculated and displayed in response to pressing a manufacturing cost calculation button.

[0104] FIG. 11 is a process flowchart of the manufacturing cost calculation method.

[0105] The processor 13 of the computer 1 executes the process shown in FIG. 11 every time a request for calculation of manufacturing costs is made by, for example, pressing a manufacturing cost calculation button on the manufacturing cost calculation screen.

[0106] First, the judgment unit 131 of the processor 13 judges whether the required specifications of the hot-stamped steel satisfy the manufacturing standard (step S1). Note that, in the case where the required specifications are selected from a template prepared in advance and it is clear that the required specifications satisfy the manufacturing standard, step S1 may be omitted since it is not necessary to judge whether the required specifications satisfy the manufacturing standard.

[0107] If it is determined that the required specifications of the hot-stamped steel satisfy the manufacturing standards (step S1: Y), the shape identification unit 132 of the processor 13 identifies one or more actual images by inputting the required image included in the required specifications into a convolutional neural network (step S2).

[0108] Next, the performance identification unit 133 of the processor 13 identifies performance information that includes a cross-sectional size that is less likely to deviate from the cross-sectional size included in the required specifications from the performance information stored in association with the identified one or more performance images (step S3).

[0109] Next, the manufacturing condition specifying unit 134 of the processor 13 specifies manufacturing conditions for the hot-stamped steel based on the required specifications that satisfy the manufacturing conditions (step S4).

[0110] Next, the calculation unit 135 of the processor 13 calculates the manufacturing cost including the material cost and the tool cost (step S5).

[0111] Following step S5, or if it is determined that the required specifications of the hot-stamped steel satisfy the manufacturing standard (step S1: Y), the creation unit 136 of the processor 13 creates display data (step S6) and ends the manufacturing cost calculation process. The display data is data for displaying whether the hot-stamped steel can be manufactured according to the required specifications, and, if the hot-stamped steel can be manufactured according to the required specifications, the calculated manufacturing cost.

[0112] It should be understood that those skilled in the art can make various changes, substitutions, and alterations thereto without departing from the spirit and scope of the present disclosure. [Explanation of symbols]

[0113] 1. Computer 131 Judgment section 132 Shape identification part 133 Performance Identification Department 134 Manufacturing condition specification department 135 Calculation Section 136 Creation Department

Claims

1. A shape specifying unit that specifies one or more actual images similar to a required image from a plurality of actual images that represent the respective cross-sectional shapes of a plurality of hot-stamped steels that have been manufactured and are stored in a memory, based on a required image that represents a cross-sectional shape of the hot-stamped steel and a required specification including a cross-sectional size, a single item length, a quantity, and a steel type. a result specification unit that specifies, from among the result information corresponding to the one or more identified result images stored in the memory in association with each of the one or more identified result images, result information including a cross-sectional size whose deviation from the cross-sectional size included in the required specifications is smaller than a predetermined size deviation threshold; A manufacturing condition determination unit that determines manufacturing conditions including a diameter, a length, and a number of billets used to manufacture hot-stamped steel according to the required specifications based on the required specifications; A calculation unit that calculates a manufacturing cost including a material cost calculated based on the identified manufacturing conditions and a tool cost calculated based on a tool unit included in the identified performance information; a generating unit for generating display data for displaying the calculated manufacturing cost; A manufacturing cost calculation device comprising:

2. The manufacturing cost calculation device according to claim 1, wherein the manufacturing condition determination unit determines the manufacturing conditions so that the length of the portion of the extruded hot-extruded steel stored in the memory, excluding a trimming allowance indicating the length of the portion to be trimmed, is longer than the single-item length included in the required specifications.

3. The tool unit cost included in the performance information is a tool unit cost indicating a cost of a tool per one extrusion, The manufacturing condition specification unit specifies the manufacturing conditions so that a remaining portion obtained by excluding the cut-off portion from a predetermined number of the hot-stamped steel pieces is small, the calculation unit calculates the manufacturing cost so as to include an amount obtained by multiplying the tool unit cost by the number of the billets as the tool cost. The manufacturing cost calculation device according to claim 2 .

4. The plurality of pieces of performance information stored in the memory further include a cross-sectional area of ​​the hot-stamped steel having a manufacturing performance, The manufacturing cost calculation device according to any one of claims 1 to 3, wherein the performance identification unit identifies, from among the multiple performance information stored in the memory, performance information including a cross-sectional size whose deviation from the cross-sectional size included in the required specifications is smaller than the predetermined size deviation threshold, and including an area of ​​the cross-sectional area whose deviation from an area of ​​the cross-sectional area calculated based on the required image and the cross-sectional size is smaller than a predetermined area deviation threshold.

5. The plurality of pieces of performance information stored in the memory further includes a finishing efficiency indicating a finishing weight per unit time for finishing the hot-stamped steel, The manufacturing cost calculation device according to any one of claims 1 to 4, wherein the calculation unit sets a unit variable cost incurred according to the production volume of the hot-pressed steel, including a refinement variable cost that is set to become smaller as the refinement efficiency included in the identified actual performance information is higher, and a fixed cost that is incurred in the production of the hot-pressed steel regardless of the production volume, calculates the variable cost by multiplying the unit variable cost by the production volume of the hot-pressed steel, and calculates the manufacturing cost further including the variable cost and the fixed cost.

6. 6. The manufacturing cost calculation device according to claim 1, further comprising a determination unit that determines whether a shape feature value calculated from a cross-sectional shape and a cross-sectional size represented in the required image included in the required specifications satisfies a manufacturing standard stored in the memory for each of the steel types.

7. 7. The manufacturing cost calculation device according to claim 6, wherein the determining unit further determines whether or not the area of ​​the cross section calculated based on the required image and the size of the cross section included in the required specifications satisfies the manufacturing standard.

8. The manufacturing cost calculation device according to claim 6 or 7, wherein the creation unit, when it is not possible to manufacture hot-stamped steel in accordance with the required specifications, generates an alternative request image by modifying the required image so as to satisfy the manufacturing criteria, and creates the display data including the generated alternative request image.

9. Based on a required image representing the cross-sectional shape of the hot-stamped steel, and the required image included in a required specification including a cross-sectional size, a single item length, a quantity, and a steel type, one or more actual images similar to the required image are identified from a plurality of actual images representing the cross-sectional shapes of a plurality of hot-stamped steels with manufacturing records stored in a memory; Identifying, from among the pieces of performance information corresponding to the one or more identified performance images stored in the memory in association with each of the one or more identified performance images, performance information including a size of the cross section whose deviation from the size of the cross section included in the required specifications is smaller than a predetermined size deviation threshold value; Identifying manufacturing conditions including a diameter, a length, and a number of billets to be used for manufacturing hot-stamped steel according to the required specifications based on the required specifications; Calculating a manufacturing cost including a material cost calculated based on the identified manufacturing conditions and a tool cost calculated based on a tool unit cost included in the identified performance information; creating display data for displaying the calculated manufacturing cost; A manufacturing cost calculation method that uses a computer to execute the above steps.

10. Based on a required image representing the cross-sectional shape of the hot-stamped steel, and the required image included in a required specification including a cross-sectional size, a single item length, a quantity, and a steel type, one or more actual images similar to the required image are identified from a plurality of actual images representing the cross-sectional shapes of a plurality of hot-stamped steels with manufacturing records stored in a memory; Identifying, from among the pieces of performance information corresponding to the one or more identified performance images stored in the memory in association with each of the one or more identified performance images, performance information including a size of the cross section whose deviation from the size of the cross section included in the required specifications is smaller than a predetermined size deviation threshold value; Identifying manufacturing conditions including a diameter, a length, and a number of billets to be used for manufacturing hot-stamped steel according to the required specifications based on the required specifications; Calculating a manufacturing cost including a material cost calculated based on the identified manufacturing conditions and a tool cost calculated based on a tool unit cost included in the identified performance information; creating display data for displaying the calculated manufacturing cost; A manufacturing cost calculation program that causes a computer to execute the above steps.

Images