JP6937412B2 - Bending time calculation device, bending time calculation system and program - Google Patents

Description

The present disclosure relates to a bending time calculation device, a bending time calculation system, and a program for calculating a bending time in manufacturing a product.

There is a system that extracts cost-related parameters from the three-dimensional figure and development of the product and automatically estimates the cost by a computer.

According to Patent Document 1, the contractor of the request for quotation of product manufacturing determines the bending process from the development view of each part obtained by dividing the three-dimensional figure into a plurality of parts from the three-view drawing of the product, and from this bending process. A method for creating an estimate for sheet metal processing work for calculating bending time and bending cost is disclosed.

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

In Patent Document 3, parameters required for estimation are acquired from three-dimensional CAD, a machining process is set based on the acquired parameters, machining man-hours for each machining process are estimated, and the machining man-hours are multiplied by a machining rate. A product manufacturing estimation device that calculates the cost by adding the material cost is disclosed.

JP-A-2002-203007 Japanese Unexamined Patent Publication No. 5-282331 Japanese Unexamined Patent Publication No. 2001-101284

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 determine whether or not the incidental work is generated in the bending process, and it is not possible to estimate the accurate machining time. In the technique of Patent Document 2, the number of bendings is used as a parameter, and the incidental work of the bending process that occurs under a specific condition is not taken into consideration. In the technique of Patent Document 3, the man-hours in consideration of the incidental work are calculated by multiplying the bending time by a coefficient, but problems include the trouble of inputting the coefficient and the low estimation accuracy.

The present disclosure has been made in view of the above-mentioned problems, and an object of the present disclosure is to make it possible to calculate a more accurate bending processing time in consideration of incidental work in the bending processing of product manufacturing. do.

In order to achieve the above object, the bending processing time calculation device according to the present disclosure includes an attribute information acquisition unit, a parameter extraction unit, an estimation reference data storage unit, and a processing time calculation unit. The attribute information acquisition unit includes process common attribute information including the material, plate thickness and dimensions of the object to be bent, and the coordinates of the bending order, bending pattern, bending angle and bending line of the bending line in the object. Acquire bending process attribute information. The parameter extraction unit extracts the main work information indicating the main work of the bending process represented by the bending order, the bending pattern and the bending angle from the bending process attribute information, and the coordinates of the bending line indicated by the bending process attribute information in the object. Based on, the incidental work information indicating the incidental work of the bending process is generated. The estimation standard data storage unit stores estimation standard data indicating the processing time for each work element included in the main work of the bending process and the incidental work of the bending process. The machining time calculation unit calculates the machining time required for bending based on the process common attribute information, the main work information, and the incidental work information with reference to the estimation reference data.

According to the present disclosure, based on the information indicating the coordinates of the bending line of the bending process in the object, the incidental work information indicating the incidental work of the bending process is generated, and the processing time is calculated by adding the incidental work information. Therefore, it becomes possible to calculate a more accurate bending processing time in consideration of incidental work in the bending processing of product manufacturing.

It is a figure which shows the structural example of the bending processing cost estimation system which concerns on embodiment of this disclosure. It is a figure which shows the functional structure example of the parameter extraction part which concerns on embodiment. It is a figure which shows the functional structure example of the incidental work determination part which concerns on embodiment. It is a figure which shows an example of 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 incidental work information which concerns on embodiment. It is a figure which shows an example of the estimation reference data of the main work which concerns on embodiment. It is a figure which shows an example of the estimation reference data of presence / absence of trial bending which concerns on embodiment. It is a figure which shows an example of the estimation reference data of the rotation of a part which concerns on embodiment. It is a figure which shows an example of the processing cost standard data which concerns on embodiment. It is a flowchart which shows an example of the operation of the bending processing cost estimation processing which concerns on embodiment. It is a flowchart which shows an example of the operation of the trial bending presence / absence determination processing which concerns on embodiment. It is a flowchart which shows an example of the operation of the rotation amount calculation process which concerns on embodiment. It is a figure which shows an example of the hardware composition of the bending processing cost estimation apparatus which concerns on embodiment.

Hereinafter, embodiments for carrying out the present disclosure 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 object to be bent is a part of the product, but the object to be bent may be the product itself.

FIG. 1 is a diagram showing a configuration example of a bending processing cost estimation system according to an embodiment of the present disclosure. The bending cost estimation system 100 includes a bending cost estimation device 1 and a designer terminal 2. Software dedicated to designing a product in three dimensions is installed in the designer terminal 2. The product designer designs the product while modeling the 3D 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 processing cost estimation device 1. The three-dimensional CAD data may be input by the designer to the bending processing cost estimation device 1. Attribute information related to bending is added to the figure in the three-dimensional CAD data. The attribute information related to the bending process includes process common attribute information including the material, plate thickness and dimensions of the material of the part, and bending process attribute information including the bending order of the bending process, the bending pattern, the bending angle and the coordinates of the bending line in the part. Is included.

The bending processing cost estimation device 1 has a CAD data acquisition unit 11, a CAD data storage unit 12, a parameter extraction unit 13, a parameter storage unit 14, an estimation standard data storage unit 15, a processing time calculation unit 16, and a processing cost standard as functional configurations. A data storage unit 17 and a 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 processing cost estimation device 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 process common attribute information and bending process attribute information. The CAD data acquisition unit 11 is an attribute information acquisition unit in the present disclosure. 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 parameters related to the bending processing 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 parameters related to the bending processing cost in the parameter storage unit 14. The parameter extraction unit 13 will be described with reference to FIG.

FIG. 2 is a diagram showing 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 incidental 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 incidental 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 part, and "Y" indicating the rectangular short side dimension of the part. It consists of the item "dimensions". 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 a "bending order" indicating the bending order, a "bending pattern" indicating the bending method, a "bending angle" indicating the bending angle, and a "bending line" indicating the XY coordinates of the starting point of the bending line in the part. It consists of items of "start point coordinates (X, Y)" and "end point coordinates of the bending line (X, Y)" indicating the XY coordinates of the end point of the bending line in the component. For example, in the bending process attribute information of FIG. 5, the bending method of the bending process in which the bending order is the first is V bending, and the bending angle is 90 degrees. The X coordinate of the start point of the bending line in this bending step is -80, the Y coordinate of the start point is -50, the X coordinate of the end point is -80, and the Y coordinate of the end point is 50.

The main work information extraction unit 23 of the parameter extraction unit 13 of FIG. 2 is represented by a “bending order”, a “bending pattern” and a “bending angle” from the bending process attribute information received from the bending process attribute information extraction unit 22. The main work information indicating the main work of the bending process 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, it performs a V-bending bending process of bending to 90 ° in the first and second bending steps as shown in FIG. The parameter storage unit 14 stores the main work information indicating the main work of performing the bending process of the hemming bending that bends to 180 ° in the third and fourth bending steps.

The incidental work determination unit 24 of the parameter extraction unit 13 of FIG. 2 includes the “bending order”, “bending line start point coordinates (X, Y)” and the “bending line start point coordinates (X, Y)” 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 the bending line", the incidental work information indicating the incidental work for each bending process is generated and stored in the parameter storage unit 14. The incidental work determination unit 24 will be described with reference to FIG.

FIG. 3 is a diagram showing a functional configuration example of the incidental work determination unit according to the embodiment. The incidental work determination unit 24 includes a trial bending presence / absence determination unit 31, a rotation amount calculation unit 32, and an incidental work information generation unit 33. The trial bending presence / absence determination unit 31 includes "bending order", "bending line start point coordinates (X, Y)" and "bending line end point coordinates (bending line end point coordinates)" included in the bending process attribute information received from the bending process attribute information extraction unit 22. Based on the items of "X, Y)", it is determined whether or not there is a trial bending operation for each bending process. In general, even for the same material, the force required for bending changes depending on conditions such as the 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. In the trial bending work, in order to suppress the variation in the bending angle due to the difference in the above conditions, the bending point is specified by bending at an angle smaller than the specified bending angle and then bending the bending point multiple times. It is the work of bending to an angle. The processing time of the bending process changes depending on whether or not the trial bending work occurs.

The trial bending presence / absence determination unit 31 defines a coordinate system whose origin is the center of the surface having the bending line in the Nth bending step in the part machined in the N-1th bending step of the bending process. The N-1th bending step is the previous bending step in the present disclosure. The Nth bending step is a later bending step in the present disclosure. The trial bending presence / absence determination unit 31 sets the values of the “bending line start point coordinates (X, Y)” and “bending line end point coordinates (X, Y)” items indicated by the bending process attribute information to the N-1th time. The coordinates of the bending line in the bending process and the coordinates in the coordinate system defined by the bending line in the Nth bending process are converted, and the angle of the bending line is calculated. When the angle of the bending line in the Nth bending process and the angle of the bending line in the N-1th bending process are different from each other, the trial bending presence / absence determination unit 31 determines that the trial bending operation occurs in the Nth bending process. If the angle of the bending line in the Nth bending step and the angle of the bending line in the N-1th bending step match, it is determined that the trial bending operation does not occur in the Nth bending step. Since the trial bending presence / absence determination unit 31 does not have the N-1th bending step for the first bending step, it determines that the trial bending operation will occur. The trial bending presence / absence determination unit 31 sends information indicating the presence / absence of the trial bending work for each bending process to the incidental work information generation unit 33.

The rotation amount calculation unit 32 includes "bending order", "bending line start point coordinates (X, Y)" and "bending line end point coordinates (X)" included in the bending process attribute information received from the bending process attribute information extraction unit 22. , Y) ”, calculate the amount of rotation that rotates the part for each bending process. When bending an arbitrary bending line, it may be necessary to rotate the part and rotate the part for setting the bending line on the descending surface of the press brake die, depending on the positional relationship between the bending lines. 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 in the same manner as the trial bending presence / absence determination unit 31, and the “bending line start point coordinates (X, Y)” and “bending line end point coordinates (X, Y)” indicated by the bending process attribute information. Convert the value of the item "Y)" to the coordinates of the bending line of the N-1th bending process and the coordinates in the coordinate system defined by the bending line of the Nth bending process, and rotate the part in the Nth bending process. Calculate the amount of rotation to be made. Since the rotation amount calculation unit 32 does not have the N-1th bending step for the first bending step, the rotation amount is set to 0 °. The rotation amount calculation unit 32 sends information indicating the rotation amount for each bending process to the incidental work information generation unit 33.

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

FIG. 7 is a diagram showing an example of incidental work information according to the embodiment. When the trial bending presence / absence determination unit 31 of the incidental work determination unit 24 receives the bending process attribute information as shown in FIG. 5, the “bending line start point coordinates (X, Y)” and “bending line end point coordinates (X)” , Y) ”, calculate the angle of the bending line in the first to fourth bending steps. The trial bending presence / absence determination unit 31 determines that the first bending step includes a trial bending operation. In the second bending step, since the angle of the bending line is the same as that of the first bending step, it is determined that there is no trial bending work. Since the angle of the bending line is different in the third bending step from the second bending step, it is determined that there is a trial bending operation. Since the angle of the bending line is the same as that of the third bending step in the fourth bending step, it is determined that there is no trial bending work. The trial bending presence / absence determination unit 31 sends information indicating such a determination result to the incidental work information generation unit 33.

When the rotation amount calculation unit 32 receives the bending process attribute information as shown in FIG. 5, the rotation amount calculation unit 32 starts from the items of "start point coordinates of bending line (X, Y)" and "end point coordinates of bending line (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 step to 0 °. Since the working direction of the second bending line is the same as the working direction of the first bending line, the amount of rotation in the second bending step is set to 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 step is set to 0 °. The trial bending presence / absence determination unit 31 sends the calculated information indicating the amount of rotation for each bending process to the incidental work information generation unit 33.

Based on the information received from the trial bending presence / absence determination unit 31 and the rotation amount calculation unit 32, the incidental work information generation unit 33 generates a trial bending operation in the first bending step as shown in FIG. 7, and the rotation amount Is 0 °, no trial bending work occurs in the second bending process, the rotation amount is 0 °, trial bending work occurs in the third bending process, and the rotation amount is 90 °, and the fourth bending process is tried. Ancillary work information indicating that the bending work does not occur and the rotation amount is 0 ° is stored in the parameter storage unit 14.

As described above, in the parameter storage unit 14 of the bending cost estimation device 1 of FIG. 1, process common attribute information, main work information, and incidental work information are stored as parameters related to the processing cost. The machining time calculation unit 16 refers to the estimation reference data stored in the estimation reference data storage unit 15 indicating the machining time for each work element included in the main work of bending and the incidental work of bending, and the parameter storage unit 14 Calculate the machining time for each bending process based on the parameters related to the machining cost stored in. The estimation reference data will be described with reference to FIGS. 8 to 10.

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

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

FIG. 10 is a diagram showing an example of estimation reference data for rotation of parts according to the embodiment. The part rotation estimation reference data indicates the additional machining time determined by the combination of the amount of rotation and the X dimension of the target part in the bending process. 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. There are items of "0 to 199 mm", "200 to 499 mm", "500 to 999 mm" and "1000 to 1500 mm" in the "X dimension" indicating. For example, when the "rotation amount" is "± 0 to 59 °" and the "X dimension" is "0 to 199 mm", an additional processing time of 2 seconds is required. Estimated reference data varies from material to material. 8 to 10 are estimation standard data of the classification to which the material (material is SPHC, plate thickness is 2.3 mm, X dimension is 200 mm, and Y dimension is 100 mm) indicated by the process common attribute information of FIG. 4 belongs.

The machining time calculation unit 16 of the bending cost estimation device 1 of FIG. 1 refers to the estimation reference data of the classification to which the material belongs indicated by the process common attribute information as shown in FIGS. Based on the work information, the machining time of the main work for each bending process, the additional machining time depending on the presence or absence of the trial bending work, and the additional machining time depending on the amount of rotation are calculated. The machining time calculation unit 16 calculates the machining time for each bending step by adding the machining time of the main work to the additional machining time depending on the presence or absence of the trial bending work and the additional machining time due to the amount of rotation. The machining time calculation unit 16 generates machining time information indicating the calculated machining time for each bending process, and sends the machining time information to the machining cost calculation unit 18. The processing cost calculation unit 18 refers to the processing cost standard data indicating the processing cost per unit time stored in the processing cost standard data storage unit 17, and processes 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 processing cost standard data according to the embodiment. The processing cost standard data consists of items of "machining method" indicating the machine used for bending and "bending standard unit price" indicating the processing cost per unit time by the machine. In the example of FIG. 11, the machines used in the bending process include "bender A", "bender B", and "bender C". "Bender A", "Bender B" and "Bender C" correspond to "V-bending", "R-bending" and "hemming-bending" bending patterns, respectively. 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 corresponds to the bending pattern according to the processing time for each bending process indicated by the processing time information. Multiply the "bending standard unit price" of "method" to calculate the processing cost for each bending process. The processing cost calculation unit 18 generates processing cost information indicating the calculated processing cost for each bending process, and transmits the processing 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 contents based on the fed-back processing cost information. The processing cost calculation unit 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 processing cost calculation unit 18 may transmit not only the processing cost information but also the processing time information to the designer terminal 2, and the processing time information transmitted to the designer terminal 2 includes the processing time of the main work and the trial. It may include information indicating the additional machining time with and without bending work and the additional machining time with the amount of rotation. Subsequently, the processing performed by the bending cost estimation device 1 will be described with reference to the flowcharts of FIGS. 12 to 14.

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). ), Stored in the parameter storage unit 14. The bending process attribute information extraction unit 22 extracts the 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 extracts the main work information. It is sent to the unit 23 and the incidental work determination unit 24. From the bending process attribute information received from the bending process attribute information extraction unit 22, the main work information extraction unit 23 obtains the main work information as shown in FIG. 6, which shows 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 determination unit 31 of the incidental work determination unit 24 includes the “bending order”, “bending line start point coordinates (X, Y)” and “bending line start point coordinates (X, Y)” 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 the bending line", a trial bending presence / absence determination process for determining the presence / absence of the trial bending operation for each bending step is performed (step S15). The trial bending presence / absence determination unit 31 generates information indicating the presence / absence of the trial bending work for each bending process as incidental work information, and stores it in the parameter storage unit 14. The rotation amount calculation unit 32 includes "bending order", "bending line start point coordinates (X, Y)" and "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 rotation amount calculation process for calculating the rotation amount for rotating the part for each bending process is performed (step S16). The rotation amount calculation unit 32 generates incidental 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 reference data of the classification to which the material belongs indicated by the process common attribute information as shown in FIGS. 8 to 10, and based on the main work information and the incidental work information, for each bending process. The processing time is calculated (step S18). The machining time calculation unit 16 sends the machining time information indicating the calculated machining time for each bending process to the machining cost calculation unit 18. The processing cost calculation unit 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 calculation unit 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 processing. 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 determination process according to the embodiment. The trial bending presence / absence determination process is started when the trial bending presence / absence determination unit 31 of the incidental work determination unit 24 receives the bending process attribute information from the bending process attribute information extraction unit 22. The trial bending presence / absence determination unit 31 determines that there is a trial bending operation when N = 1 (step S21; YES) in the Nth bending step (step S26). When N = 1 (step S21; NO), the trial bending presence / absence determination unit 31 uses the center of the surface having the bending line of the Nth bending step as the origin in the part machined in the N-1th bending step. The coordinate system is defined (step S22). When N = 1, the X coordinate of the origin is the 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 the value of "Y dimension" of the process common attribute information divided by 2. It is the divided value.

The trial bending presence / absence determination unit 31 has "bending line start point coordinates (X, Y)" and "bending" of the bending line of the N-1th bending process and the bending line of the Nth bending process indicated by the bending process attribute information. The value of the item "Line end point coordinates (X, Y)" is converted into the coordinates of the bending line of the N-1th bending step and the coordinates in the coordinate system defined by the bending line of the Nth bending step (step S23). ). The trial bending presence / absence determination unit 31 determines the angle of the bending line of the N-1th bending process from the coordinates of the bending line of the N-1th bending process and the coordinates of the bending line of the Nth bending process in the defined coordinate system. And the angle of the bending line in the Nth bending step is calculated (step S24). Assuming that the X coordinate of the start point of the bend line in the Nth bending step in the defined coordinate system is x1, the Y coordinate of the start point is y1, the X coordinate of the end point is x2, and the Y coordinate of the end point is y2, the angle of the bend line = tan. ^{-1 From the} formula of {(y2-y1) / (x2-x1)}, the angle of the bending line in the Nth bending step is obtained. However, if the bending line angle is negative, 180 is added. The angle of the bending line in the N-1th bending step is also obtained in the same manner.

The trial bending presence / absence determination unit 31 determines whether or not the angle of the bending line in the Nth bending step and the angle of the bending line in the N-1th bending step are different (step S25). When the angle of the bending line in the Nth bending step and the angle of the bending line in the N-1th bending step are different (step S25; YES), the trial bending presence / absence determining unit 31 determines that the trial bending work is performed. (Step S26). When the angle of the bending line in the Nth bending step and the angle of the bending line in the N-1th bending step match (step S25; NO), the trial bending presence / absence determining unit 31 determines that there is no trial bending operation. (Step S27).

If the Nth bending step is not the final bending step (step 28; NO), the process returns to step S22, and the trial bending presence / absence determination unit 31 repeats steps S22 to 28. When the Nth bending step is the final bending step (step 28; YES), the trial bending presence / absence determination unit 31 sends information indicating the presence / absence of the trial bending work for each bending step to the incidental work information generation unit 33. End the process. Subsequently, the rotation amount calculation process defined in step S16 of the flowchart of FIG. 12 will be described with reference to 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 incidental 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 step as 0 ° when N = 1 (step S31; YES) for the Nth bending step (step S35). If N = 1 (step S31; NO), the process proceeds to step S32. Since steps S32 and S33 are the same processes as steps S22 and S23 in the flowchart of FIG. 13, description thereof will be omitted. The rotation amount calculation unit 32 starts from the coordinates of the bending line of the N-1st bending step and the coordinates of the bending line of the Nth bending step in the defined coordinate system, and the working direction of the bending line of the N-1th bending step. And the working direction of the bending line in the Nth bending step is calculated (step S34). The rotation amount calculation unit 32 draws a vertical line a from the origin with respect to the bending line in the Nth bending step. If the vertical line a cannot be drawn from the origin with respect to the bending line of the Nth bending step, a vertical line a is drawn from the origin with respect to the extension line of the bending line of the Nth bending step. The angle (counterclockwise) formed by the X coordinate axis of the first quadrant and the vertical line a is defined as the working direction of the bending line. The working direction of the bending line in the N-1th bending step is also obtained in the same manner.

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

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

In the above embodiment, the processing time and processing cost for each bending process are calculated, but the total processing time and processing cost for all bending processes may be calculated. Further, in the above embodiment, the incidental 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 processing 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 is composed of a CPU (Central Processing Unit) and the like, and according to a 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 of the 18 processes is executed.

The temporary storage unit 101 is composed of a RAM (Random-Access Memory) or the like, loads a 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, and a DVD-RW, and stores in advance a program for causing the calculation unit 103 to perform the processing of the bending processing cost estimation device 1. , The data stored in this program is supplied to the calculation unit 103 according to the instruction of 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 reference data storage unit 15, and the processing cost reference 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 for connecting 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 is composed of a network termination 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), an LCD (Liquid Crystal Display), or the like. The display unit 106 displays an operation screen when the user inputs information to the bending cost estimation device 1. When the processing cost calculation unit 18 displays the processing cost information, the display unit 106 functions as the processing cost calculation unit 18.

CAD data acquisition unit 11, CAD data storage unit 12, parameter extraction unit 13, parameter storage unit 14, estimation reference data storage unit 15, processing time calculation unit 16, processing cost reference data of the bending processing cost estimation device 1 shown in FIG. The control program processes the storage unit 17 and the processing cost calculation unit 18 by 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. To do by.

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

The central part for processing 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 a dedicated system. However, it can be realized by using a normal computer system. For example, a computer program for performing the above operation is stored and distributed on a computer-readable recording medium (flexible disk, CD-ROM, DVD-ROM, etc.), and the computer program is installed on the computer. Therefore, the bending processing cost estimation device 1 that executes the above-mentioned processing may be configured. Further, the bending processing cost estimation device 1 may be configured by storing the computer program in a storage device of a server device on a communication network such as the Internet and downloading it by a normal computer system.

Further, when the function of the bending cost estimation device 1 is realized by sharing the OS (operating system) and the application program, or by coordinating the OS and the application program, only the application program part is used as a recording medium or a storage device. It 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 system (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 and executed in the same manner as other application programs under the control of the OS so that the above processing can be executed.

1 Bending processing 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 estimation standard 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 incidental work judgment unit, 31 trial bending presence / absence determination unit, 32 rotation amount Calculation unit, 33 Ancillary work information generation unit, 100 Bending processing 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)

Process common attribute information including the material, plate thickness and dimensions of the material of the object to be bent, and bending process attribute information including the coordinates of the bending order, bending pattern, bending angle and bending line of the bending line in the object. Attribute information acquisition part to acquire
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 set. Based on this, a parameter extraction unit that generates incidental work information indicating the incidental work of the bending process, and
An estimation reference data storage unit that stores estimation reference data indicating the machining time for each work element included in the main work of the bending process and the incidental work of the bending process.
A machining time calculation unit that calculates the machining time required for the bending process based on the process common attribute information, the main work information, and the incidental work information with reference to the estimation reference data.
A bending time calculation device including. The parameter extraction unit
Regarding the bending step of the destination where the bending order of the bending process is adjacent and the bending process of the subsequent bending process, the origin is the center of the surface of the object processed in the previous bending process where the bending line of the subsequent bending process is present. A coordinate system is defined, and the coordinates of the bending line of the earlier bending process and the bending line of the later bending process indicated by the bending process attribute information in the object are set to the bending line of the earlier bending process and the subsequent bending line. When the bending line of the bending process is converted to the coordinates in the defined coordinate system and the angle of the bending line of the previous bending process and the angle of the bending line of the subsequent bending process in the defined coordinate system are different, If it is determined that a trial bending operation will occur in the subsequent bending step, and the angle of the bending line of the previous bending step in the defined coordinate system matches the angle of the bending line of the subsequent bending step, the above Equipped with a trial bending presence / absence determination unit that determines that trial bending work does not occur in the subsequent bending process.
The bending time calculation device according to claim 1, wherein the incidental work information includes information indicating the presence or absence of the trial bending work in the bending work. The parameter extraction unit
Regarding the bending step of the destination where the bending order of the bending process is adjacent and the bending process of the subsequent bending process, the origin is the center of the surface of the object processed in the previous bending process where the bending line of the subsequent bending process is present. A coordinate system is defined, and the coordinates of the bending line of the earlier bending process and the bending line of the later bending process indicated by the bending process attribute information in the object are set to the bending line of the earlier bending process and the subsequent bending line. Converted to the coordinates in the coordinate system defined by the bending line of the bending step, and 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. A rotation amount calculation unit for calculating the rotation amount for rotating the object in the subsequent bending step is provided.
The bending time calculation device according to claim 1 or 2, wherein the incidental work information includes information indicating the amount of rotation in the bending process. A bending time calculation system consisting of a designer terminal used by a designer and a bending time calculation device.
The designer terminal
Process common attribute information including the material, plate thickness and dimensions of the material of the object to be bent, and bending process attribute information including the coordinates of the bending order, bending pattern, bending angle and bending line of the bending line in the object. Is transmitted to the bending processing time calculation device, and the three-dimensional CAD data to which is added is transmitted.
The bending time calculation device is
Attribute information acquisition unit that acquires the 3D 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 set. Based on the parameter extraction unit, which generates incidental work information indicating the incidental work of the bending process.
An estimation reference data storage unit that stores estimation reference data indicating the machining time for each work element included in the main work of the bending process and the incidental work of the bending process, and an estimation standard data storage unit.
A machining time calculation unit that calculates the machining time required for the bending process based on the process common attribute information, the main work information, and the incidental work information with reference to the estimation reference data.
Bending processing time calculation system equipped with. Computer,
Process common attribute information including the material, plate thickness and dimensions of the material of the object to be bent, and bending process attribute information including the coordinates of the bending order, bending pattern, bending angle and bending line of the bending line in the object. Attribute information acquisition part to acquire
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 set. Based on the parameter extraction unit that generates incidental work information indicating the incidental work of the bending process, and
With reference to the estimation reference data indicating the machining time for each work element included in the main work of the bending process and the incidental work of the bending process, based on the process common attribute information, the main work information, and the incidental work information. Processing time calculation unit that calculates the processing time required for the bending process,
A program that functions as.

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