JP6723082B2 - Bending cost estimation device, bending cost estimation system and program - Google Patents

Description

The present invention relates to a bending cost estimation device, a bending cost estimation system and a program for estimating a bending cost in manufacturing a product.

There is a system that extracts parameters related to costs from a three-dimensional view of a product or a development view and automatically estimates costs by a computer.

In Patent Document 1, a contractor who requests a product manufacturing quotation determines a bending process from a development view of each part obtained by dividing a three-dimensional view of a product into a plurality of parts from a three-dimensional view, A method for making an estimate of a sheet metal working operation for calculating a bending time and a bending cost is disclosed.

Patent Document 2 discloses a component cost estimation system that extracts parameters related to the machining cost of a component, such as parameters such as the number of bends, the number of screw holes, and the plate thickness value, from CAD shape data in which each component data is recorded. ing.

In Patent Document 3, a parameter required for estimation is acquired from three-dimensional CAD, a machining process is set based on the acquired parameter, a machining man-hour for each machining process is estimated, and the machining man-hour is multiplied by a machining rate. There is disclosed a product manufacturing estimation device for calculating the cost by adding the material cost.

JP, 2002-203007, A Japanese Unexamined Patent Publication No. 5-283331 JP 2001-101284 A

In the technique of Patent Document 1, since the working time is obtained based on the information added to the bending line alone, it is not possible to judge whether or not an incidental work occurs in the bending process, and it is not possible to accurately estimate the working time. The technique of Patent Document 2 uses the number of times of bending as a parameter, and does not consider incidental work of the bending process that occurs under specific conditions. In the technique of Patent Literature 3, the bending time is multiplied by a coefficient to calculate the number of man-hours in consideration of the accompanying work. However, problems include that it takes time to input the coefficient and estimation accuracy is low.

The present invention has been made in view of the above problems, and an object thereof is to make it possible to estimate a more accurate bending cost in consideration of ancillary work in bending of manufacturing a product. ..

In order to achieve the above object, the bending cost estimation device according to the present invention includes an attribute information acquisition section, a parameter extraction section, an estimation reference data storage section, a processing time calculation section, a processing cost reference data storage section, And a processing cost calculator. The attribute information acquisition unit includes the process common attribute information including the material of the material of the bending object, the plate thickness and the dimension, and the bending order of the bending operation, the bending pattern, the bending angle, and the coordinates of the bending line in the object. Acquires bending process attribute information. The parameter extraction unit extracts, from the bending process attribute information, main work information indicating a bending work main work represented by a bending order, a bending pattern, and a bending angle, and coordinates of the bending line indicated by the bending process attribute information in the object. Based on, the associated work information indicating the associated work of the bending work is generated. The estimation reference data storage unit stores estimation reference data indicating a processing time for each work element included in the main bending work and the accompanying bending work. The processing time calculation unit refers to the estimation standard data, and calculates the processing time required for bending based on the process common attribute information, the main work information, and the associated work information. The processing cost reference data storage unit stores processing cost reference data indicating the processing cost per unit time. The processing cost calculation unit refers to the processing cost reference data, and calculates the processing cost for bending the object based on the processing time calculated by the processing time calculation unit.

According to the present invention, based on the information indicating the coordinates of the bending line of the bending work on the object, the accompanying work information indicating the accompanying work of the bending work is generated, and the working time and the processing cost are calculated by adding the accompanying work information. By calculating, it becomes possible to more accurately estimate the bending cost in consideration of the incidental work in the bending process of manufacturing the product.

It is a figure which shows the structural example of the bending cost estimation system which concerns on embodiment of this invention. It is a figure which shows the functional structural example of the parameter extraction part which concerns on embodiment. It is a figure which shows the functional structural example of the accompanying work determination part which concerns on embodiment. It is a figure which shows an example of the process common attribute information which concerns on embodiment. It is a figure which shows an example of the bending process attribute information which concerns on embodiment. It is a figure which shows an example of the main work information which concerns on embodiment. It is a figure which shows an example of the accompanying work information which concerns on embodiment. It is a figure which shows an example of the estimation standard data of the main work which concerns on embodiment. It is a figure which shows an example of the estimation reference|standard data of the presence or absence of trial bending which concerns on embodiment. It is a figure which shows an example of the estimation reference|standard data of rotation of the component which concerns on embodiment. It is a figure which shows an example of the processing cost reference data which concerns on embodiment. 9 is a flowchart showing an example of an operation of a bending cost estimation process according to the embodiment. 6 is a flowchart showing an example of an operation of trial bending presence/absence determination processing according to the embodiment. 6 is a flowchart showing an example of an operation of rotation amount calculation processing according to the embodiment. It is a figure which shows an example of the hardware constitutions of the bending cost estimation apparatus which concerns on embodiment.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. The same or corresponding parts in the drawings are designated by the same reference numerals. In the following embodiments, the bending target is a product part, but the bending target may be the product itself.

FIG. 1 is a diagram showing a configuration example of a bending cost estimation system according to an embodiment of the present invention. The bending cost estimation system 100 includes a bending cost estimation device 1 and a designer terminal 2. In the designer terminal 2, software dedicated to designing a three-dimensional product is installed. A product designer designs a product while modeling a three-dimensional CAD model using such software. The designer terminal 2 transmits the three-dimensional CAD data of the product designed by the designer to the bending cost estimation device 1. The designer may input the three-dimensional CAD data into the bending cost estimation device 1. Attribute information relating to bending is added to the figure in the three-dimensional CAD data. The bending process attribute information includes the process common attribute information including the material of the part, the plate thickness and the dimension, and the bending process attribute information including the bending order of the bending process, the bending pattern, the bending angle, and the coordinate of the part in the bending line. Is included.

The bending processing cost estimation device 1 has, as a functional configuration, a CAD data acquisition unit 11, a CAD data storage unit 12, a parameter extraction unit 13, a parameter storage unit 14, an estimation reference data storage unit 15, a processing time calculation unit 16, and a processing cost reference. The data storage unit 17 and the processing cost calculation unit 18 are provided. The CAD data acquisition unit 11 acquires three-dimensional CAD data from the designer terminal 2. When the designer inputs the three-dimensional CAD data to the bending cost estimation apparatus 1, the CAD data acquisition unit 11 accepts the input of the three-dimensional CAD data from the designer. The CAD data acquisition unit 11 may acquire at least the process common attribute information and the bending process attribute information. The CAD data acquisition unit 11 is the attribute information acquisition unit according to the present invention. The CAD data acquisition unit 11 stores the acquired three-dimensional CAD data in the CAD data storage unit 12.

The parameter extraction unit 13 extracts a parameter related to the bending cost from the process common attribute information and the bending process attribute information added to the three-dimensional CAD data stored in the CAD data storage unit 12. The parameter extraction unit 13 stores the extracted parameter relating to the bending cost in the parameter storage unit 14. The parameter extraction unit 13 will be described with reference to FIG.

FIG. 2 is a diagram illustrating a functional configuration example of the parameter extraction unit according to the embodiment. The parameter extraction unit 13 includes a process common attribute information extraction unit 21, a bending process attribute information extraction unit 22, a main work information extraction unit 23, and an associated work determination unit 24. The process common attribute information extraction unit 21 extracts the process common attribute information from the attribute information added to the three-dimensional CAD data stored in the CAD data storage unit 12, and stores it in the parameter storage unit 14. The bending process attribute information extraction unit 22 extracts the bending process attribute information from the attribute information added to the three-dimensional CAD data stored in the CAD data storage unit 12, and sends it to the main work information extraction unit 23 and the accompanying work determination unit 24. .. The process common attribute information and the bending process attribute information will be described with reference to FIGS. 4 and 5.

FIG. 4 is a diagram showing an example of process common attribute information according to the embodiment. The process common attribute information includes “material” indicating the type of material, “plate thickness” indicating the plate thickness, “X dimension” indicating the rectangular long side dimension of the component, and “Y” indicating the rectangular short side dimension of the component. "Dimension". In the example of FIG. 4, the type of material is SPHC, the plate thickness is 2.3 mm, the rectangular long side dimension of the component is 200 mm, and the rectangular short side dimension of the component is 100 mm.

FIG. 5 is a diagram showing an example of bending process attribute information according to the embodiment. The bending process attribute information includes “bending order” indicating a bending order, “bending pattern” indicating a bending method, “bending angle” indicating a bending angle, and “bending line” indicating an XY coordinate of a starting point of a bending line in a part. Starting point coordinates (X, Y)" and "ending line ending point coordinates (X, Y)" indicating the XY coordinates of the end point of the bending line in the part. For example, the bending method of the first bending step in the bending step attribute information of FIG. 5 is V bending, and the bending angle is 90 degrees. In this bending process, the X coordinate of the starting point of the bending line is -80, the Y coordinate of the starting point is -50, the X coordinate of the ending point is -80, and the Y coordinate of the ending point is 50.

The main work information extraction unit 23 of the parameter extraction unit 13 of FIG. 2 is represented by “bending order”, “bending pattern”, and “bending angle” from the bending process attribute information received from the bending process attribute information extracting unit 22. Main work information indicating the main work of bending is extracted and stored in the parameter storage unit 14. The main work information will be described with reference to FIG.

FIG. 6 is a diagram showing an example of main work information according to the embodiment. When the main work information extraction unit 23 receives the bending process attribute information as shown in FIG. 5, the main work information extracting unit 23 performs a bending process of V bending for bending at 90° in the first and second bending processes as shown in FIG. The main work information indicating the main work of performing the bending process of the hemming bending of bending to 180° in the third and fourth bending steps is stored in the parameter storage unit 14.

The associated work determination unit 24 of the parameter extraction unit 13 of FIG. 2 includes “bending order”, “bending line starting point coordinates (X, Y)” and “bending order” included in the bending process attribute information received from the bending process attribute information extraction unit 22. Based on the item of “end point coordinates (X, Y) of bending line”, ancillary work information indicating ancillary work for each bending process is generated and stored in the parameter storage unit 14. The accompanying work determination unit 24 will be described with reference to FIG.

FIG. 3 is a diagram illustrating an example of a functional configuration of the associated work determination unit according to the embodiment. The associated work determination unit 24 includes a trial bending presence/absence determination unit 31, a rotation amount calculation unit 32, and an associated work information generation unit 33. The trial bending presence/absence determining unit 31 includes “bending order”, “bending line starting point coordinates (X, Y)”, and “bending line ending point coordinates (included in the bending process attribute information received from the bending process attribute information extracting unit 22. The presence or absence of trial bending work for each bending step is determined based on the item "X, Y)". In general, even for the same material, the force required for bending changes depending on conditions such as temperature, the degree of wear of the mold, the quality of the material, and the bending direction of the material with respect to the rolling direction. Trial bending work is to bend at a specified bending point by bending at an angle smaller than the specified bending angle and then bending the bending point multiple times in order to suppress variations in bending angle due to the above conditions. It is a work to bend at an angle. The processing time of the bending process varies depending on whether or not the trial bending work is performed.

The trial bending presence/absence determining unit 31 defines a coordinate system whose origin is the center of a surface having a bending line in the N-th bending process in a component processed in the N−1-th bending process of bending. The N-1th bending step is the previous bending step in the present invention. The N-th bending step is a subsequent bending step in the present invention. The trial bending presence/absence determining unit 31 sets the values of the items “bending line start point coordinates (X, Y)” and “bending line end point coordinates (X, Y)” indicated by the bending process attribute information to the N−1th time. The angle of the bending line is calculated by converting the coordinates of the bending line of the bending process and the coordinates of the bending line of the N-th bending process into the defined coordinate system. If the angle of the bending line in the N-th bending step and the angle of the bending line in the N-1th bending step are different from each other, the trial bending presence/absence determining unit 31 determines that the trial bending work occurs in the N-th bending step. When it is determined that the angle of the bending line in the N-th bending step and the angle of the bending line in the N−1-th bending step match, it is determined that the trial bending operation does not occur in the N-th bending step. The trial bending presence/absence determining unit 31 determines that the trial bending operation occurs because the first bending step does not include the (N-1)th bending step. The trial bending presence/absence determining unit 31 sends information indicating the presence/absence of trial bending work for each bending process to the associated work information generating unit 33.

The rotation amount calculation unit 32 includes the “bending order”, the “bending line start point coordinates (X, Y)”, and the “bending line end point coordinates (X) included in the bending process attribute information received from the bending process attribute information extraction unit 22. , Y)”, the amount of rotation for rotating the part for each bending step is calculated. When bending an arbitrary bending line, depending on the positional relationship between the bending lines, it may be necessary to rotate the part and set the bending line on the descending surface of the die of the press brake. The processing time for bending varies depending on the amount of rotation that rotates the part.

The rotation amount calculation unit 32 defines a coordinate system similarly to the trial bending presence/absence determination unit 31, and defines “bending line start point coordinates (X, Y)” and “bending line end point coordinates (X, Y)” value is converted into the coordinates of the bending line in the (N-1)th bending step and the coordinates in the defined coordinate system of the bending line in the Nth bending step, and the part is rotated in the Nth bending step. The amount of rotation to be performed is calculated. The rotation amount calculation unit 32 sets the rotation amount to 0° because there is no N-1th bending process for the first bending process. The rotation amount calculation unit 32 sends information indicating the rotation amount for each bending process to the associated work information generation unit 33.

The accompanying work information generation unit 33 generates, based on the information received from the trial bending presence/absence determination unit 31 and the rotation amount calculation unit 32, accompanying work information indicating the presence or absence and the rotation amount of the trial bending work for each bending process, and the parameters It is stored in the storage unit 14. The accompanying work information will be described with reference to FIG. 7.

FIG. 7 is a diagram showing an example of associated work information according to the embodiment. When the trial bending presence/absence determining unit 31 of the accompanying work determining unit 24 receives the bending process attribute information as shown in FIG. 5, the “bending line start point coordinates (X, Y)” and the “bending line end point coordinates (X , Y)”, the angle of the bending line in the first to fourth bending steps is calculated. The trial bending presence/absence determining unit 31 determines that there is a trial bending operation in the first bending step. Since the angle of the bending line in the second bending step matches that in the first bending step, it is determined that there is no trial bending work. Since the third bending step differs from the second bending step in the angle of the bending line, it is determined that there is a trial bending operation. Since the angle of the bending line in the fourth bending step matches that in the third bending step, it is determined that the trial bending operation is not performed. The trial bending presence/absence determining unit 31 sends information indicating such a determination result to the associated work information generating unit 33.

When the bending amount attribute information as shown in FIG. 5 is received, the rotation amount calculation unit 32 selects from the items “bending line start point coordinates (X, Y)” and “bending line end point coordinates (X, Y)”. The working direction of the bending line in the first to fourth bending steps is calculated. The rotation amount calculation unit 32 sets the rotation amount in the first bending process to 0°. Since the working direction of the second bending line is the same as the working direction of the first bending line, the rotation amount of the second bending process is 0°. From the difference between the working direction of the third bending line and the working direction of the second bending line, the rotation amount of the third bending step is 90°. Since the working direction of the fourth bending line is the same as the working direction of the third bending line, the rotation amount of the fourth bending process is 0°. The trial bending presence/absence determining unit 31 sends information indicating the calculated rotation amount for each bending process to the associated work information generating unit 33.

Based on the information received from the trial bending presence/absence determining unit 31 and the rotation amount calculating unit 32, the accompanying work information generating unit 33 generates the trial bending work in the first bending process as shown in FIG. Is 0°, the trial bending work does not occur in the second bending process, the rotation amount is 0°, the trial bending work occurs in the third bending process, the rotation amount is 90°, the trial bending work is performed in the fourth bending process. The parameter storage unit 14 stores accompanying work information indicating that the bending work does not occur and the rotation amount is 0°.

As described above, the process storage attribute information, the main work information, and the associated work information are stored in the parameter storage unit 14 of the bending cost estimation device 1 of FIG. 1 as parameters related to the processing cost. The processing time calculation unit 16 refers to the estimation reference data stored in the estimation reference data storage unit 15 that indicates the processing time for each work element included in the main work of bending and the accompanying work of bending, and the parameter storage unit 14 The processing time for each bending step is calculated based on the parameters related to the processing cost stored by the. The estimation reference data will be described with reference to FIGS.

FIG. 8 is a diagram showing an example of estimation reference data for main work according to the embodiment. The estimation reference data of the main work indicates the processing time determined by the combination of the bending angle and the bending pattern. In the example of FIG. 8, the “bending angle” includes items of “30°”, “60°”, “90°”, “120°”, “150°”, and “180°”, and “bending pattern” "Includes items of "V bend", "R bend" and "hemming bend". For example, the processing time is 3 seconds for "V bending" of "90°". “Hemming bending” has a “bending angle” of 180° and a processing time of 10 seconds.

FIG. 9 is a diagram showing an example of estimation reference data regarding the presence/absence of trial bending according to the embodiment. The trial bending presence/absence estimation reference data indicates additional processing time determined by the presence/absence of trial bending work. In the example of FIG. 9, when the trial bending work occurs, additional processing time takes 20 seconds.

FIG. 10 is a diagram showing an example of estimation reference data of rotation of components according to the embodiment. The estimation reference data of the rotation of the component indicates an additional processing time determined by the combination of the rotation amount and the X dimension of the component to be bent. In the example of FIG. 10, the "rotation amount" includes items of "±0 to 59°", "±60 to 119°", and "±120 to 180°", and the X dimension of the part to be bent. The "X dimension" indicating "" has items of "0 to 199 mm", "200 to 499 mm", "500 to 999 mm", and "1000 to 1500 mm". For example, when the “rotation amount” is “±0 to 59°” and the “X dimension” is “0 to 199 mm”, additional processing time is 2 seconds. Estimated standard data differs for each material. 8 to 10 are estimation standard data of the classification to which the material indicated by the process common attribute information of FIG. 4 (the material is SPHC, the plate thickness is 2.3 mm, the X dimension is 200 mm and the Y dimension is 100 mm) belongs.

The processing time calculation unit 16 of the bending processing cost estimation device 1 of FIG. 1 refers to the estimation standard data of the classification to which the material indicated by the process common attribute information belongs, as shown in FIGS. Based on the work information, the processing time of the main work for each bending process, the additional processing time depending on the presence or absence of the trial bending work, and the additional processing time depending on the rotation amount are calculated. The processing time calculation unit 16 calculates the processing time for each bending process by adding the additional processing time depending on the presence or absence of the trial bending work and the additional processing time depending on the rotation amount to the processing time of the main work. The processing time calculation unit 16 generates processing time information indicating the calculated processing time for each bending process, and sends it to the processing cost calculation unit 18. The processing cost calculation unit 18 refers to the processing cost reference data indicating the processing cost per unit time stored in the processing cost reference data storage unit 17, and based on the processing time information received from the processing time calculation unit 16, Calculate the cost. The processing cost reference data will be described with reference to FIG.

FIG. 11 is a diagram showing an example of the processing cost reference data according to the embodiment. The processing cost standard data includes items of "processing method" indicating a machine used for bending and "bending standard unit price" indicating processing cost per unit time by the machine. In the example of FIG. 11, there are “bender A”, “bender B”, and “bender C” as machines used for bending. “Bender A”, “Bender B” and “Bender C” respectively correspond to bending patterns of “V bend”, “R bend” and “hemming bend”. Further, in the example of FIG. 11, the “bending standard unit price” indicates the processing cost per second.

The processing cost calculation unit 18 of the bending processing cost estimation device 1 of FIG. 1 refers to the processing cost reference data as shown in FIG. 11, and refers to the processing time for each bending step indicated by the processing time information and corresponds to the “machining”. Multiply the "bending standard unit price" of "Method" to calculate the processing cost for each bending step. The machining cost calculation unit 18 generates machining cost information indicating the calculated machining cost for each bending process, and transmits the machining cost information to the designer terminal 2. The designer terminal 2 displays the processing cost information received from the bending processing cost estimation device 1. The designer can modify the design content based on the fed back processing cost information. The processing cost calculator 18 may store or display the generated processing cost information. In this case, the designer refers to the processing cost information stored or displayed in the bending processing cost estimation device 1. The machining cost calculation unit 18 may transmit not only the machining cost information but also the machining time information to the designer terminal 2, and the machining time information transmitted to the designer terminal 2 includes the machining time of the main work and the trial. Information may be included that indicates the additional processing time depending on the presence or absence of the bending work and the additional processing time depending on the rotation amount. Next, the processing performed by the bending cost estimation device 1 will be described with reference to the flowcharts of FIGS.

FIG. 12 is a flowchart showing an example of the operation of the bending cost estimation process according to the embodiment. The bending cost estimation process starts when the bending cost estimation device 1 is activated. The CAD data acquisition unit 11 of the bending cost estimation device 1 acquires three-dimensional CAD data from the designer terminal 2 (step S11). The CAD data acquisition unit 11 stores the acquired three-dimensional CAD data in the CAD data storage unit 12.

The process common attribute information extraction unit 21 of the parameter extraction unit 13 extracts the process common attribute information as shown in FIG. 4 from the attribute information added to the three-dimensional CAD data stored in the CAD data storage unit 12 (step S12). ), and stores it in the parameter storage unit 14. The bending process attribute information extraction unit 22 extracts bending process attribute information as shown in FIG. 5 from the attribute information added to the three-dimensional CAD data stored in the CAD data storage unit 12 (step S13), and main work information extraction. It is sent to the unit 23 and the associated work determination unit 24. From the bending process attribute information received from the bending process attribute information extracting unit 22, the main work information extracting unit 23 obtains the main work information as shown in FIG. 6 indicating the “bending order”, the “bending pattern”, and the “bending angle”. It is extracted (step S14) and stored in the parameter storage unit 14.

The trial bending presence/absence determining unit 31 of the accompanying work determining unit 24 includes “bending order”, “bending line starting point coordinates (X, Y)”, and “bending line” included in the bending process attribute information received from the bending process attribute information extracting unit 22. Based on the item "end point coordinates (X, Y) of bending line", a trial bending presence/absence determining process is performed to determine the presence/absence of trial bending work for each bending process (step S15). The trial bending presence/absence determining unit 31 generates information indicating the presence/absence of trial bending work for each bending process as accompanying work information, and stores it in the parameter storage unit 14. The rotation amount calculation unit 32 includes the “bending order”, the “bending line start point coordinates (X, Y)”, and the “bending line end point coordinates (X) included in the bending process attribute information received from the bending process attribute information extraction unit 22. , Y)”, a rotation amount calculation process for calculating the rotation amount for rotating the component for each bending step is performed (step S16). The rotation amount calculation unit 32 generates accompanying work information as shown in FIG. 7 (step S17) and stores it in the parameter storage unit 14.

The machining time calculation unit 16 refers to the estimation standard data of the classification to which the material indicated by the process common attribute information as shown in FIGS. 8 to 10, and based on the main work information and the associated work information, for each bending process. The processing time is calculated (step S18). The processing time calculation unit 16 sends processing time information indicating the calculated processing time for each bending process to the processing cost calculation unit 18. The processing cost calculator 18 refers to the processing cost reference data as shown in FIG. 11, and calculates the processing cost for each bending process based on the processing time information received from the processing time calculator 16 (step S19). .. The processing cost calculation unit 18 generates processing cost information indicating the calculated processing cost for each bending process (step S20), and ends the process. Subsequently, the trial bending presence/absence determination process defined in step S15 of the flowchart of FIG. 12 will be described with reference to the flowchart of FIG.

FIG. 13 is a flowchart showing an example of the operation of the trial bending presence/absence determining process according to the embodiment. The trial bending presence/absence determining process starts when the trial bending presence/absence determining unit 31 of the associated work determining unit 24 receives the bending process attribute information from the bending process attribute information extracting unit 22. The trial bending presence/absence determining unit 31 determines that the trial bending operation is performed when N=1 in the N-th bending process (step S21; YES) (step S26). When N is not 1 (step S21; NO), the trial bending presence/absence determining unit 31 sets the center of the surface having the bending line of the N-th bending step in the component processed in the N−1-th bending step as the origin. A coordinate system is defined (step S22). When N=1, the X coordinate of the origin is a value obtained by dividing the value of “X dimension” of the process common attribute information by 2, and the X coordinate of the origin is 2 of the value of “Y dimension” of the process common attribute information. It is the divided value.

The trial bending presence/absence determining unit 31 indicates the “starting point coordinates (X, Y) of the bending line” and the “bending line” of the bending line of the N−1th bending process and the bending line of the Nth bending process, which are indicated by the bending process attribute information. The value of the item "End point coordinate of line (X, Y)" is converted into the coordinates of the bending line of the (N-1)th bending step and the coordinates of the bending line of the Nth bending step in the defined coordinate system (step S23). ). The trial bending presence/absence determining unit 31 determines the angle of the bending line of the (N-1)th bending step from the coordinates of the bending line of the (N-1)th bending step and the coordinates of the bending line of the Nth bending step in the defined coordinate system. And the angle of the bending line in the N-th bending step is calculated (step S24). If the X coordinate of the starting point of the bending line in the Nth bending step in the defined coordinate system is x1, the Y coordinate of the starting point is y1, the X coordinate of the ending point is x2, and the Y coordinate of the ending point is y2, the angle of the bending line is tan. ⁻¹ {(y2-y1)/(x2-x1)} is used to calculate the angle of the bending line in the N-th bending step. However, when the bending line angle is negative, 180 is added. The angle of the bending line in the (N-1)th bending step is similarly obtained.

The trial bending presence/absence determining unit 31 determines whether the angle of the bending line in the N-th bending step and the angle of the bending line in the N−1-th bending step are different (step S25). When the angle of the bending line in the N-th bending step is different from the angle of the bending line in the N−1-th bending step (step S25; YES), the trial bending presence/absence determining unit 31 determines that the trial bending operation is performed. (Step S26). When the angle of the bending line in the N-th bending step and the angle of the bending line in the N-1-th bending step match (step S25; NO), the trial bending presence/absence determining unit 31 determines that there is no trial bending work. Yes (step S27).

If the N-th bending process is not the final bending process (step 28; NO), the process returns to step S22, and the trial bending presence/absence determining unit 31 repeats steps S22 to S28. When the N-th bending process is the last bending process (step 28; YES), the trial bending presence/absence determining unit 31 sends information indicating the presence/absence of trial bending work for each bending process to the associated work information generating unit 33, The process ends. Next, the rotation amount calculation processing defined in step S16 of the flowchart of FIG. 12 will be described using the flowchart of FIG.

FIG. 14 is a flowchart showing an example of the operation of the rotation amount calculation process according to the embodiment. The rotation amount calculation process starts when the rotation amount calculation unit 32 of the associated work determination unit 24 receives the bending process attribute information from the bending process attribute information extraction unit 22. The rotation amount calculation unit 32 calculates the rotation amount of the first bending process as 0° when N=1 (step S31; YES) for the Nth bending process (step S35). When N=1 is not satisfied (step S31; NO), the process proceeds to step S32. Steps S32 and S33 are the same processes as steps S22 and S23 of the flowchart of FIG. 13, and therefore description thereof will be omitted. From the coordinates of the bending line of the (N-1)th bending process and the coordinates of the bending line of the Nth bending process in the defined coordinate system, the rotation amount calculation unit 32 determines the working direction of the bending line of the N-1th bending process. And the working direction of the bending line in the N-th bending step is calculated (step S34). The rotation amount calculation unit 32 draws a vertical line a from the origin for the bending line in the N-th bending process. When the vertical line a cannot be drawn from the origin with respect to the bending line in the N-th bending step, the vertical line a is drawn from the origin with respect to the extension line of the bending line in the N-th bending step. The angle between the X coordinate axis of the first quadrant and the vertical line a (counterclockwise) is the working direction of the bending line. The work direction of the bending line in the (N-1)th bending step is similarly obtained.

The rotation amount calculation unit 32 subtracts the value of the working direction of the bending line of the (N-1)th bending process from the value of the working direction of the bending line of the Nth bending process as the rotation amount of the Nth bending process. Calculate (step S35). If the N-th bending process is not the final bending process (step 36; NO), the process returns to step S32, and the rotation amount calculation unit 32 repeats steps S32 to S36. When the N-th bending process is the last bending process (step 36; YES), the rotation amount calculation unit 32 sends information indicating the rotation amount for each bending process to the associated work information generation unit 33, and the process is ended. ..

As described above, according to the bending cost estimation device 1 of the embodiment, based on the information indicating the coordinates of the bending line of the bending process on the object, the accompanying work information indicating the accompanying work of the bending process is generated, By calculating the processing time and the processing cost in consideration of the accompanying work information, it is possible to estimate the bending work cost more accurately in consideration of the accompanying work in the bending process of manufacturing the product.

In the above embodiment, the processing time and the processing cost for each bending step are calculated, but the total processing time and the processing cost for all the bending steps may be calculated. Further, in the above embodiment, the accompanying work determination unit 24 includes the trial bending presence/absence determination unit 31 and the rotation amount calculation unit 32, but may be configured to include either one.

FIG. 15 is a diagram showing an example of the hardware configuration of the bending cost estimation device according to the embodiment. As shown in FIG. 15, the bending cost estimation device 1 includes a temporary storage unit 101, a storage unit 102, a calculation unit 103, an input unit 104, an external output unit 105, and a display unit 106. The temporary storage unit 101, the storage unit 102, the input unit 104, the external output unit 105, and the display unit 106 are all connected to the calculation unit 103 via the BUS.

The calculation unit 103 includes a CPU (Central Processing Unit) and the like, and according to the control program stored in the storage unit 102, the parameter extraction unit 13, the processing time calculation unit 16, and the processing cost calculation unit of the bending processing cost estimation device 1. Each process of 18 is performed.

The temporary storage unit 101 is composed of a RAM (Random-Access Memory) or the like, loads the control program stored in the storage unit 102, and is used as a work area of the calculation unit 103.

The storage unit 102 is composed of a non-volatile memory such as a flash memory, a hard disk, a DVD-RAM, a DVD-RW, etc., and stores in advance a program for causing the calculation unit 103 to perform the process of the bending cost estimation device 1, and According to the instruction of the calculation unit 103, the data stored in this program is supplied to the calculation unit 103, and the data supplied from the calculation unit 103 is stored. The CAD data storage unit 12, the parameter storage unit 14, the estimation standard data storage unit 15, and the processing cost standard data storage unit 17 are configured in the storage unit 102.

The input unit 104 includes a pointing device such as a keyboard and a mouse, and an interface device that connects the keyboard and the pointing device to the BUS. The information input via the input unit 104 is supplied to the calculation unit 103. When the designer inputs the three-dimensional CAD data to the bending cost estimation device 1, the input unit 104 functions as the CAD data acquisition unit 11.

The external output unit 105 includes a network terminating device or a wireless communication device connected to the network, and a serial interface or a LAN (Local Area Network) interface connected to them. When the processing cost calculation unit 18 transmits the processing cost information to the designer terminal 2, the external output unit 105 functions as the processing cost calculation unit 18.

The display unit 106 is composed of a CRT (Cathode Ray Tube) or an LCD (Liquid Crystal Display). The display unit 106 displays an operation screen when the user inputs information to the bending cost estimation device 1. When the processing cost calculator 18 displays the processing cost information, the display unit 106 functions as the processing cost calculator 18.

The CAD data acquisition unit 11, the CAD data storage unit 12, the parameter extraction unit 13, the parameter storage unit 14, the estimation reference data storage unit 15, the processing time calculation unit 16, the processing cost reference data of the bending processing cost estimation device 1 shown in FIG. The processing of the storage unit 17 and the processing cost calculation unit 18 is performed by the control program using the temporary storage unit 101, the calculation unit 103, the storage unit 102, the input unit 104, the external output unit 105, the display unit 106, and the like as resources. Run by

In addition, the hardware configuration and the flowchart described above are examples, and can be arbitrarily changed and modified.

The central portion for performing the processing of the bending cost estimation device 1 including the calculation unit 103, the temporary storage unit 101, the storage unit 102, the input unit 104, the external output unit 105, the display unit 106, etc. is provided in a dedicated system. However, it can be realized using a normal computer system. For example, a computer program for executing the above operation is stored in a computer-readable recording medium (flexible disk, CD-ROM, DVD-ROM, etc.) and distributed, and the computer program is installed in the computer. Thus, the bending cost estimation device 1 that executes the above process may be configured. Further, the bending process cost estimation device 1 may be configured by storing the computer program in a storage device included in a server device on a communication network such as the Internet and downloading the computer program by an ordinary computer system.

Further, when the function of the bending cost estimation device 1 is realized by sharing of an OS (operating system) and an application program or by cooperation between the OS and the application program, only the application program part is a recording medium or a storage device. May be stored in.

It is also possible to superimpose a computer program on a carrier wave and provide it via a communication network. For example, the computer program may be posted on a bulletin board (BBS, Bulletin Board System) on a communication network, and the computer program may be provided via the network. Then, the computer program may be started up and executed under the control of the OS in the same manner as other application programs so that the above-described processing can be executed.

1 Bending cost estimation device, 2 Designer terminal, 11 CAD data acquisition unit, 12 CAD data storage unit, 13 Parameter extraction unit, 14 Parameter storage unit, 15 Estimated reference data storage unit, 16 Processing time calculation unit, 17 Processing cost Reference data storage unit, 18 processing cost calculation unit, 21 process common attribute information extraction unit, 22 bending process attribute information extraction unit, 23 main work information extraction unit, 24 auxiliary work determination unit, 31 trial bending presence/absence determination unit, 32 rotation amount Calculation unit, 33 Associated work information generation unit, 100 Bending cost estimation system, 101 Temporary storage unit, 102 Storage unit, 103 Calculation unit, 104 Input unit, 105 External output unit, 106 Display unit.

Claims (5)

Bending process attribute information including the material of the material of the bending process, plate thickness and dimensions, and bending process attribute of the bending process, bending pattern, bending angle, and bending line in the object. An attribute information acquisition unit that acquires
From the bending process attribute information, the main work information indicating the main work of the bending process represented by the bending order, the bending pattern, and the bending angle is extracted, and the coordinates of the bending line indicated by the bending process attribute information in the object are extracted. On the basis of a parameter extraction unit that generates incidental work information indicating the incidental work of the bending work,
An estimation reference data storage unit that stores estimation reference data indicating processing time for each work element included in the main work of the bending work and the accompanying work of the bending work,
A processing time calculation unit that calculates the processing time required for the bending process based on the process common attribute information, the main work information, and the accompanying work information with reference to the estimation reference data,
A processing cost standard data storage unit for storing processing cost standard data indicating a processing cost per unit time,
A processing cost calculation unit that refers to the processing cost reference data and calculates a processing cost for bending the object based on the processing time calculated by the processing time calculation unit,
Bending cost estimation device equipped with. The parameter extraction unit,
Regarding the previous bending step and the subsequent bending step in which the bending order of the bending step is adjacent to each other, the center of the surface having the bending line of the subsequent bending step in the object processed in the previous bending step is the origin. A coordinate system is defined, and the coordinates of the bending line of the previous bending step and the bending line of the subsequent bending step indicated by the bending step attribute information in the object are defined as the bending line of the previous bending step and the subsequent bending line. If the angle of the bending line of the previous bending step and the angle of the bending line of the subsequent bending step in the defined coordinate system are different, the coordinates are converted to the coordinates in the defined coordinate system of the bending step of the bending step, If it is determined that a trial bending operation occurs in the subsequent bending step, and the angle of the bending line of the preceding bending step and the angle of the bending line of the subsequent bending step in the defined coordinate system match, Equipped with a trial bending presence/absence determining unit that determines that trial bending work does not occur in the subsequent bending step,
The bending work cost estimation device according to claim 1, wherein the accompanying work information includes information indicating whether or not the trial bending work is performed in the bending work. The parameter extraction unit,
Regarding the previous bending step and the subsequent bending step in which the bending order of the bending step is adjacent to each other, the center of the surface having the bending line of the subsequent bending step in the object processed in the previous bending step is the origin. A coordinate system is defined, and the coordinates of the bending line of the previous bending step and the bending line of the subsequent bending step indicated by the bending step attribute information in the object are defined as the bending line of the previous bending step and the subsequent bending line. From the difference between the working direction of the bending line of the previous bending step and the working direction of the bending line of the subsequent bending step in the defined coordinate system, which is converted into the coordinates in the defined coordinate system of the bending line of the bending step. A rotation amount calculation unit that calculates a rotation amount for rotating the object in the subsequent bending step,
The bending work cost estimation device according to claim 1, wherein the accompanying work information includes information indicating the rotation amount in the bending work. A bending cost estimation system comprising a designer terminal used by a designer and a bending cost estimation device,
The designer terminal is
Bending process attribute information including the material of the material of the bending process, plate thickness and dimensions, and bending process attribute of the bending process, bending pattern, bending angle, and bending line in the object. The three-dimensional CAD data with is added to the bending cost estimation device,
The bending cost estimation device,
An attribute information acquisition unit that acquires the three-dimensional CAD data from the designer terminal,
From the bending process attribute information, the main work information indicating the main work of the bending process represented by the bending order, the bending pattern, and the bending angle is extracted, and the coordinates of the bending line indicated by the bending process attribute information in the object are extracted. A parameter extraction unit for generating incidental work information indicating the incidental work of the bending work,
An estimation reference data storage unit that stores estimation reference data indicating processing time for each work element included in the main work of the bending work and the accompanying work of the bending work,
A processing time calculation unit that refers to the estimation standard data and calculates a processing time required for the bending based on the process common attribute information, the main work information, and the accompanying work information,
A processing cost standard data storage unit that stores processing cost standard data indicating a processing cost per unit time, and
Referring to the processing cost reference data, based on the processing time calculated by the processing time calculation unit, the processing cost required for the bending process is calculated, and the processing cost information indicating the calculated processing cost is sent to the designer terminal. Processing cost calculator to send,
Bending cost estimation system with. Computer,
Bending process attribute information including the material of the material of the bending process, plate thickness and dimensions, and bending process attribute of the bending process, bending pattern, bending angle, and bending line in the object. The attribute information acquisition unit that acquires
From the bending process attribute information, the main work information indicating the main work of the bending process represented by the bending order, the bending pattern, and the bending angle is extracted, and the coordinates of the bending line indicated by the bending process attribute information in the object are extracted. A parameter extraction unit for generating incidental work information indicating the incidental work of the bending work,
Referring to the estimation standard data indicating the processing time for each work element included in the main work of the bending work and the accompanying work of the bending work, based on the process common attribute information, the main work information and the accompanying work information, A processing time calculation unit that calculates a processing time required for the bending, and
With reference to the processing cost reference data indicating the processing cost per unit time, based on the processing time calculated by the processing time calculation unit, a processing cost calculation unit that calculates the processing cost for the bending,
A program to function as.

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