JP6520459B2 - Forging die design support apparatus and forging die design support method - Google Patents

Description

  The present invention relates to a forging die design support device and a forging die design support method for supporting the design of a forging die.

  When designing a forging die for a forged product such as a turbine blade, the designer can manufacture the forged product, and further, a shape that does not cause a missing while reducing the input weight of the material as much as possible. You need to make sure that Therefore, the designer uses the rigid plastic finite element method or the like to analyze the force acting at the time of stamping and the flow of material on multiple cross sections of the forging die, and from the analysis result, the moment and load applied to the manufacturing apparatus Was calculated to determine the shape of the forging die.

  By the way, the forging method of the forged product of the twisted shape includes a finish forging method of forging to a twisted shape and a flat forging method of twisting after forging, but the finish forging method is more preferable in that the number of processes is reduced. It is advantageous. However, in the finish forging method, since the moment applied to the material is large, the movement of the material occurs, and this movement often causes a chipping. The moment is influenced by the punching angle, the position and the orientation of the material, and the position and the orientation of the material affect the amount and appearance of the burrs. Therefore, in the design of the forging die, it is essential to thoroughly examine the influence of the moment, and in particular to confirm the presence or absence of a missing portion.

  As described above, in the design of the forging die, after the designer determines the shape of the forging die, analysis calculation is performed to confirm the possibility of production and the presence or absence of a defect. As a result of the confirmation, in the case where production is not possible or missing occurs, the designer changes the shape of the forging die, re-executes the analysis calculation, and confirms the availability of production and the presence or absence of missing. repeat. As described above, it is necessary to evaluate the moment applied to the manufacturing apparatus to determine whether or not to manufacture, but this depends on the position and orientation of the material. Under the present circumstances, the determination of the position and orientation of the material is made by a skilled person confirming the amount and appearance of burrs obtained as a result of analysis and the presence or absence of a defect each time and repeatedly changing it based on experience. Therefore, while designing a forge type takes a lot of man-hours, it is an operation which requires expert's know-how.

  For example, Patent Document 1 discloses an example of a forging type design support device that supports the design of a roll mold by a computer. In addition, in Patent Document 2, it is determined whether or not the forged product has a missing portion, and whether the degree of the missing portion is within an acceptable range if the missing portion is occurring. There is disclosed an example of a meat loss inspection apparatus which performs easily and accurately.

JP-A-11-96201 JP 2008-188615 A

  However, the forging die design support device disclosed in Patent Document 1 supports the design of a roll die used for rolling, and the design parameter used in the design is the design of a forging die for forging. Greatly different from the design parameters used in Therefore, it is difficult to use the forging type design support device disclosed in Patent Document 1 as a forge type design support device.

  Moreover, in the missing material inspection apparatus described in Patent Document 2, although the presence or absence of the missing material can be determined, it is not possible to sufficiently evaluate the amount of burrs and the appearance of the burrs. In addition, even in the case of determining the presence or absence of a defect, it is difficult to use this method as a design support method because it is necessary to measure the weight of the forged product and the weight of the burr.

  Therefore, an object of the present invention is to provide a forging die design support device and a forge die design support method that can quantitatively evaluate the amount of burrs and the appearance of the burrs at the time of manufacturing a forged product at the time of design.

The forging die design support device according to the present invention includes a processing device, a storage device, and an input / output device, and the processing device is configured to receive product shape data of a forged product and the dimensions of the forging die via the input / output device. Data, placement position data of the material, dimension data of the material, and analysis condition data including parameters of the forging simulation model are input, and a process in which the material is forged by the forging die is input using the data A forging simulation unit that simulates and calculates shape data of the material after forging, and a position outside a start point of a parting line for determining a burr generated in the process of the forging through the input / output device inputs the validator determination condition data indicating, using the validator determination condition data, calculated by the forging simulation unit It said extracting portion of the validator from the shape data of the material after the forging, characterized in that it comprises a validator calculation unit for calculating a value of at least one data representative of the amount or size of the burr.

  According to the present invention, it is possible to provide a forge type design support device and a forge type design support method that can quantitatively evaluate the amount of burrs and the appearance of burrs at the time of manufacturing a forged product at the time of design.

The figure which showed the example of the structure of the forge type | mold design assistance apparatus which concerns on embodiment of this invention. The figure which showed the example of the data flow figure of the process in the forge type | mold design assistance apparatus which concerns on embodiment of this invention. The figure which showed typically the process in which forging type | mold shape data are produced from product shape data. The figure which showed the example of the positional relationship of the forge type | mold (upper type | mold and lower type | mold) and the raw material of forge object at the time of a forge start, and each shape. The figure which showed typically the example of the final shape of the raw material obtained by simulation of the forge process by a forge analysis part. The figure which showed the example of the display screen displayed in order to set a burr | flash determination line and a burr | flash direction vector. The figure which showed the example of the display screen which deform | transformed a part of display screen shown in FIG. The figure which showed the 2nd example of the display screen which deform | transformed a part of display screen shown in FIG. The figure which showed typically the example of the shape of the part of the burr | flash of the raw material obtained by simulation of a forge process, and is a figure shown in order to demonstrate a burr | flash cross-sectional area. The figure which showed the example of the processing flow of the burr cross-section calculation process by the burr cross-section / length calculation part. The figure which showed typically the example of the shape of the part of the burr | flash of the raw material obtained by simulation of a forge process, and is a figure shown in order to demonstrate burr | flash length. The figure which showed the example of the processing flow which calculates the burr | flash length by a burr | flash cross-sectional area * length calculation part. The figure which showed the example of the processing flow of the optimization part. The figure which showed the example of the display screen displayed by the display part.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In each of the drawings, the same reference numerals are given to constituent elements in common, and duplicate explanations are omitted.

  FIG. 1 is a diagram showing an example of the configuration of a forging die design support apparatus 100 according to an embodiment of the present invention. As shown in FIG. 1, the forging die design support device 100 according to the present embodiment is configured to include a processing device 10, a storage device 20, and an input / output device 30. That is, in terms of hardware, forging type design support apparatus 100 can be realized using a general personal computer, a work station, or the like.

  The processing device 10 corresponds to a so-called central processing unit (CPU) portion of a computer, and realizes various data processing functions by executing a program stored in advance in the storage device 20. In the present embodiment, in order to realize the function of the forging die design support apparatus 100, the processing device 10 includes a design basic data input unit 101, a forging die shape creating unit 102, a material shape creating unit 103, a forging analysis unit 104, and a burr. Processing blocks such as a determination position input unit 105, a burr cross section / length calculation unit 106, a display unit 107, and an optimization unit 108 are provided. The processing contents of these processing blocks will be sequentially described below.

  The storage device 20 is configured by a random access memory (RAM), a read only memory (ROM), a hard magnetic disk device, a solid state disk (SSD) device, and the like. The storage device 20 stores a program to be executed by the processing device 10, data input via the input / output device 30, work data used for executing the program, data obtained as a result of execution of the program, etc. Is stored. In the present embodiment, in the storage device 20, product shape data 201, forging die size data 202, material dimension data 203, analysis condition data 204, forging die shape data 205, material shape data 206, analysis result data 207, burr judgment Condition data 208, burr cross section / length data 209, etc. are stored. The details of these data will also be described in order below.

  The input / output device 30 includes an input device such as a keyboard, a mouse, and a touch panel, and an output device such as a liquid crystal display device and a printer. Then, the input / output unit 30 constructs a user interface between the processing unit 10 and the user (designer of forging type). Note that a communication device for connecting to a LAN (Local Area Network) or the Internet, or a drive device for a portable memory such as a USB (Universal Serial Bus) memory may be included in the input / output device 30.

  FIG. 2 is a diagram showing an example of a data flow diagram of processing in the forging die design support apparatus 100. As shown in FIG. Here, first, an outline of processing in the forging die design support apparatus 100 will be described using this data flow diagram. The data flow diagram of FIG. 2 does not include the optimization unit 108. The processing flow of the optimization unit 108 will be described again with reference to the drawings.

  As shown in FIG. 2, the design basic data input unit 101 first reads product shape data 201, forging die size data 202, material dimension data 203, and analysis condition data 204 input by the user via the input / output device 30. , And stored in the storage device 20. These data may be data created by another computer different from the forging die design support apparatus 100. In that case, the design basis data input unit 101 may read data created by another computer via a communication network or a portable memory (not shown).

  The forging die shape creating unit 102 creates the forging die shape data 205 from the product shape data 201 and the forging die size data 202, and the material shape creating unit 103 uses the forging die shape data 205 and the material dimension data 203 to Shape data 206 is created. Here, when the material is, for example, a cylindrical shape, the material dimension data 203 includes data such as the diameter and height of the cylinder.

  The forging analysis unit 104 simulates movement, etc. of the material in the forging process using the forging die shape data 205, the material shape data 206 and the analysis condition data 204 as input data, and stores the result in the storage device 20 as the analysis result data 207. Do. Here, as a simulation method, for example, a rigid plastic finite element method can be used. Analysis condition data 204 includes a friction model between the forging die and the material, a friction coefficient, a heat transfer coefficient, an ambient (environment) temperature, a forging die temperature, an initial material temperature, an upper die reduction rate, an upper die stop condition, etc. , Parameters and data that make up the simulation model of forging.

  The burr judgment position input unit 105 reads data such as a burr judgment position, a burr direction vector, distance definition data (maximum value, minimum value, average value) input by the user, and stores it in the storage device 20 as burr judgment condition data 208. Do. Further, the burr cross section / length calculation unit 106 calculates the burr cross section and length from the analysis result data 207 and the burr judgment condition data 208, and stores the result as the burr cross section / length data 209. Store in 20.

  The display unit 107 stores at least one of the forging die shape data 205, the material shape data 206, the analysis result data 207, the burr judgment condition data 208, and the burr cross section / length data 209 stored in the storage device 20. The data including is output to the input / output device 30, for example, displayed on the screen of the liquid crystal display device.

  Further, the optimization unit 108 appropriately changes the value of the design factor (the position of the material, etc.) input by the user, while the forging die shape creation unit 102, the material shape creation unit 103, the forging analysis unit 104, and the burr cross section The processing of the length calculation unit 106 is repeatedly executed. Then, this iterative process is performed until the value of a predetermined objective function (eg, burr cross section or length or both) reaches the minimum value or near the minimum value. Optimize the value. In that case, the optimization unit 108 may have a function of displaying a table or a graph (such as a response surface) used in the process of the optimization process.

  Subsequently, the processing content of each processing block such as the forging die shape creation unit 102 included in the processing apparatus 10 (see FIG. 1) will be described in detail using FIGS.

  FIG. 3 is a view schematically showing a process of creating forging die shape data 205 from product shape data 201. As shown in FIG. As shown in FIG. 3, the forging die shape creation unit 102 first creates a shape obtained by enlarging the shape represented by the product shape data 201 by the forging allowance, using the forging die size data 202, and data representing the shape These are used as contour shape data 201a after forging allowance is applied. Next, forging shape shape creation unit 102 creates a shape in which the shape represented by contour shape data 201a after forging allowance is increased in consideration of thermal expansion at the forging temperature, and data representing the shape is obtained after thermal expansion The contour shape data 201b is used.

  Next, the forging die shape creation unit 102 adds the parting line PL to the shape represented by the post-thermal-expansion contour shape data 201b in consideration of the escape gradient and the burr path. Then, the forging die shape creation unit 102 uses the contour shape data 201b after thermal expansion, the parting line PL, and the line drawn from the parting line PL to a position higher by the flash thickness FT to make the die engraving shape data 201c. create. Furthermore, the forging die shape creation unit 102 creates data of a shape obtained by hollowing out the shape represented by the die engraving shape data 201 c from an arbitrary rectangle (a rectangular parallelepiped in three dimensions), and uses it as forging die shape data 205. Note that the geometry data representing the forging die shape data 205 may be directly input from the input / output device 30, and the process of the forging die shape creation unit 102 may be omitted.

  FIG. 4 is a view showing an example of the positional relationship between the forging die 300 (upper die 301 and lower die 302) and the material 303 to be forged at the start of forging, and an example of each shape. As described above, the material shape creating unit 103 creates the material shape data 206 from the forging die shape data 205 and the material dimension data 203. Here, the material shape data 206 is data not only representing the shape of the material 303 but also representing the positional relationship between the upper die 301 and the lower die 302 of the forging die 300 and the material 303 to be forged.

  Therefore, when the material 303 is, for example, a cylindrical shape, the material shape creating unit 103 acquires data of the diameter and height of the cylinder from the material dimension data 203, and the material 303 input by the user via the input / output device 30. Get data of placement position and placement direction of Furthermore, using the acquired data and the forging die shape data 205, the material shape creating unit 103 displays the positional relationship between the upper die 301, the lower die 302, and the material 303 as shown in FIG. Material shape data 206 is created. The geometry data of the material shape data 206 may be directly input from the input / output device 30, and the process of the material shape creation unit 103 may be omitted.

  The forging analysis unit 104 first sets a mesh for analysis simulation in a space representing the positional relationship between the forging die 300 (upper die 301 and lower die 302) and the material 303 as shown in FIG. . At this time, the number of meshes is set by the user via the input / output device 30, for example. Subsequently, the forging analysis unit 104 determines the friction model, the friction coefficient, the heat transfer coefficient, the ambient (environment) temperature, the forging die temperature, the initial material temperature, the upper die reduction speed, and the upper die stop condition specified by the analysis condition data 204. Create a forging analysis model using Next, the forging analysis unit 104 simulates the forging process of the material 303 using the analysis model, and stores the result in the storage device 20 as the analysis result data 207.

  FIG. 5 is a view schematically showing an example of the final shape of the material 303 a obtained by the simulation of the forging process by the forging analysis unit 104. Here, the portion of the material 303 a that protrudes outside (the burr path) beyond the start position PS of the parting line PL is called a burr 400 and is removed in the final forged product. The burrs 400 are required to prevent a loss of meat but should be as small as possible.

  Therefore, in the present embodiment, in order to evaluate the amount of the burr 400 obtained as a result of simulation, the burr judgment line 404 and the burr direction vector 405 are set by the processing of the burr judgment position input unit 105. As shown in FIG. 5, the burr judgment line 404 is a boundary that distinguishes the portion judged to be the burr 400 in the material 303 a after forging, and is slightly smaller than the start point PS (product side end) of the parting line PL. Provided on the outside. Further, in FIG. 5, the burr direction vector 405 indicates the direction in which the burr 400 moves outward. In the present embodiment, no particular meaning is given to the size of the burr direction vector 405, and for example, the size may be a unit.

  The burr determination line 404 and the burr direction vector 405 include the centers of the upper mold 301, the material 303, and the lower mold 302, and are set for any cross section perpendicular to the parting line PL, for example. The example of FIG. 5 is an example in which forging of the material 303 a is analyzed in a cross section parallel to the xz plane, and the parting line PL is substantially parallel to the x axis. Therefore, the burr direction vectors 405 with respect to the burrs 400 at the left and right ends of the material 303 a are all in the direction along the x-axis direction.

  FIG. 6 is a diagram showing an example of the display screen 31 displayed to set the burr judgment line 404 and the burr direction vector 405. As shown in FIG. This display screen 31 is displayed by the burr judgment position input unit 105, and is used, for example, when analyzing forging of the material 303a in a cross section parallel to the xz plane as in the case of FIG. Burr determination line 404 and a burr direction vector 405 are set. That is, on this display screen 31, as the burr judgment line 404, the burr A judgment line 404a and the burr B judgment line 404b are set at the left and right ends along the x axis. Also, as the burr direction vector 405, the burr A direction vector 405a and the burr B direction vector 405b are set at the left and right ends, respectively.

  Here, when the display screen 31 as shown in FIG. 6 is displayed, the burr judgment position input unit 105 first displays the numerical value input boxes 311a and 311b and the radio buttons 312a and 312b, and further, the upper model to be analyzed. An example of the cross-sectional structure of the lower mold 302, the lower mold 302 and the material 303 is displayed. At this time, the burr A determination line 404a, the burr B determination line 404b, the burr A direction vector 405a and the burr B direction vector 405b are not displayed.

  Therefore, when the user inputs numerical values representing the positions of the burr A determination line 404a and the burr B determination line 404b in the numerical value input boxes 311a and 311b, the burr determination position input unit 105 reads these values. Then, the positions of the burr A determination line 404a and the burr B determination line 404b are set based on the numerical values. Furthermore, when the user selects one button (−x side or + x side) for each of the radio buttons 312a and 312b, the burring position input unit 105 acquires the selection information. Then, based on the selection information, the directions of the burr A direction vector 405a and the burr B direction vector 405b are set.

  Next, the burr judgment position input unit 105 sets the upper mold 301, the lower mold 302, and the material of the burr A judgment line 404a, the burr B judgment line 404b, the burr A direction vector 405a and the burr B direction vector 405b set above. The cross-sectional structure 303 is displayed in the displayed display screen 31 (see FIG. 6).

  In the example of FIG. 6, the numerical values to be input to the numerical value input boxes 311a and 311b are x-axis coordinate values in the coordinate system used when displaying the upper mold 301, the lower mold 302 and the material 303. And Here, the unit of coordinate values and length in this coordinate system is mm, and the origin of the x axis (x = 0) is the center of the arrangement position of the upper mold 301 and the lower mold 302, for example, circular It is assumed that it is set at the center of the material 303 of.

  FIG. 7 is a view showing an example of a display screen 32 in which a part of the display screen 31 shown in FIG. 6 is modified. The display screen 32 shown in FIG. 7 is almost the same as the display screen 31 shown in FIG. 6, but the numerical values input to the numerical value input boxes 313a and 313b are different from the example in FIG. That is, in the example of FIG. 7, the burr A judgment line 404a and the burr B judgment to be set from the product side ends 406a and 406b in the parting line PL instead of the coordinate values in the numerical value input boxes 313a and 313b. The distance is input to the line 404b. Here, it is assumed that the unit of distance is mm.

  Furthermore, due to the above difference, the display screen 32 of FIG. 7 displays the display of FIG. 6 also in the point that not only the burr A determination line 404a and the burr B determination line 404b but also the product side ends 406a and 406b are displayed by thick broken lines. This is different from screen 31. However, setting the directions of the burr A direction vector 405a and the burr B direction vector 405b using the radio buttons 312a and 312b is the same as the example of FIG.

  As described above, in the display screen 32 of FIG. 7, the positions of the burr A determination line 404a and the burr B determination line 404b can be set by the relative distance from the product side ends 406a and 406b. It can be said that it is easy to operate.

  FIG. 8 is a view showing a second example of the display screen 32 in which a part of the display screen 31 shown in FIG. 6 is modified. In the display screen 33 shown in FIG. 8, the burr determination line 404 is not limited to a straight line, and may be a curved line. Therefore, on the display screen 33, text boxes 314a and 314b for inputting the name of a file storing data defining the shapes of the burr A determination line 404a and the burr B determination line 404b are displayed. Further, in the display screen 33, radio buttons 312a and 312b for selecting the direction (−x side or + x side) of the burr A direction vector 405a and the burr B direction vector 405b are the same as the display screen 31 of FIG. Is displayed.

  Therefore, the user can set the positions and shapes of the burr A determination line 404a and the burr B determination line 404b via the text boxes 314a and 314b and the numerical value input boxes 311a and 311b displayed on the display screen 33. Also, the user can set the directions of the burr A direction vector 405a and the burr B direction vector 405b via the radio buttons 312a and 312b.

  Therefore, when the user sets the burr A determination line 404a, the burr B determination line 404b, the burr A direction vector 405a, and the burr B direction vector 405b, the burr judgment position input unit 105 selects the upper mold 301 and the lower mold 302. And the cross-sectional structure of the material 303 is displayed in the displayed display screen 33 (see FIG. 8). Furthermore, the burr judgment position input unit 105 displays a straight line representing the innermost positions 407a and 407b in the display screen 33 with thick broken lines.

  In the above description of FIGS. 6 to 8, in order to simplify the description, simulation analysis of forging of the material 303 in two dimensions is premised, but actual forging is performed in three-dimensional space . In three-dimensional analysis, the burr judgment line 404 is generally represented by a curved surface, and should be called a burr judgment curved surface. Therefore, in this case, for example, in the display screen 33 of FIG. 8, a text box (not shown) for inputting the name of a file storing data defining the shape of the burr judgment curved surface instead of the text boxes 314a and 314b. Will be displayed.

Similarly, in three-dimensional analysis, the direction of the burr direction vector 405 can not be represented only on the −x side or the + x side, so in general, it is necessary to represent the vector with three components (v _x , v _y , v _z ) There is. Therefore, for example, on the display screen 33, a numerical value input box (not shown) for inputting values of v _x , v _y and v _z will be displayed instead of the radio buttons 312a and 312b.

When the data for defining the burr judgment line 404 and the burr direction vector 405 is acquired as described above, the burr judgment position input unit 105 stores them as the burr judgment condition data 208 in the storage device 20. Next, the burr cross section / length calculation unit 106 calculates the cross section area and length of the burr 400 using the analysis result data 207 and the burr judgment condition data 208, and the result is the burr cross section area / length. It is stored in the storage device 20 as data 209.
Hereinafter, the calculation processing flow of the burr cross-sectional area will be described using FIG. 9 and FIG. 10, and the burr length calculation processing will be described using FIG. 11 and FIG.

  FIG. 9 is a view schematically showing an example of the shape of the portion of the burr 400 of the material 303a obtained by the simulation of the forging process, and is a view shown to explain the burr sectional area. Here, the object of calculation of the burr cross section by the burr cross section / length calculation unit 106 is the burr judgment line in the material 303 a which has been protruded into the gap portion (burr path) between the upper mold 301 and the lower mold 302. It is a part on the arrow direction side of the burr direction vector 405 than 404. That is, the burr 400 is shown in FIG. 9 as a portion surrounded by the material boundary line 303 b and the burr judgment line 404 and a portion surrounded by a thick line.

  FIG. 10 is a diagram showing an example of a processing flow of burr cross section calculation processing by the burr cross section / length calculation unit 106. As shown in FIG. 10, the burr sectional area / length calculation unit 106 first extracts mesh data of the material 303a, the upper mold 301 and the lower mold 302 from the analysis result data 207 (step S10). Next, the burr sectional area / length calculation unit 106 extracts the burr judgment line 404 and the burr direction vector 405 from the burr judgment condition data 208 (step S11).

  Subsequently, the burr sectional area / length calculation unit 106 generates a burr area boundary line (indicated by a thick line in FIG. 9) from the mesh data of the material 303a and the burr judgment line 404 (step S12), and the burr area boundary line The area of the part enclosed by is calculated (step S13).

  The above description is based on two-dimensional analysis of the forging process, but in the case of three-dimensional analysis, the burr cross-sectional area is calculated as a burr volume. In that case, the burr area boundary line in steps S12 and S13 should be called a burr area boundary surface. Therefore, the burr volume can be said to be the volume of the portion surrounded by the burr region boundary surface.

  By the way, in the three-dimensional analysis, the burr 400 appears along the gap between the upper mold 301 and the lower mold 302 so as to surround the material 303 a. Therefore, for example, when the material 303a is cut through a center of the material 303a and a surface substantially perpendicular to the lower surface of the lower mold 302, the cross-sectional area of the burrs 400 appearing at both ends of the material 303a is the processing flow of FIG. It can be calculated by Therefore, the cross-sectional area of the burr 400 is calculated by rotating the cut surface through the center of the material 303a and by a minute angle Δθ around an axis substantially perpendicular to the lower surface of the lower mold 302, and the 180 ° rotation is calculated. Let In this case, the volume of the burr 400 is calculated as the sum (integrated value) of the cross-sectional area when calculated at each rotation angle.

  FIG. 11 is a view schematically showing an example of the shape of the portion of the burr 400 of the material 303 a obtained in the simulation of the forging process, and is a view shown to explain the burr length 409. In FIG. 11, the same components as those shown in FIG. 9 are denoted by the same reference numerals, and the description thereof is omitted. Here, the burr length 409 is the distance from the burr judgment line 404 to the burr outermost position 408 in the portion of the material 303 a protruding into the gap portion (burr path) between the upper mold 301 and the lower mold 302. Calculated

  FIG. 12 is a diagram showing an example of a processing flow for calculating the burr length 409 by the burr sectional area / length calculation unit 106. As shown in FIG. 12, the burr sectional area / length calculation unit 106 first extracts mesh data of the material 303a, the upper mold 301 and the lower mold 302 from the analysis result data 207 (step S20). Next, the burr sectional area / length calculation unit 106 extracts the burr judgment line 404 and the burr direction vector 405 from the burr judgment condition data 208 (step S21).

  Subsequently, the burr sectional area / length calculation unit 106 extracts the burr outermost position 408 of the burr 400 from the mesh data of the material 303 a and the burr judgment line 404 (step S 22), and further, the burr judgment line 404 The distance to the outermost position 408 is calculated as the burr length 409 (step S23).

  As described above, in the three-dimensional analysis, the burrs 400 appear everywhere so as to surround the material 303 a along the gap between the upper die 301 and the lower die 302, but The burr length 409 is generally not the same.

  Therefore, in the three-dimensional analysis, first, the burr cross-sectional area / length calculation unit 106 cuts the material 303 a in a plane substantially perpendicular to the engraving surface of the lower mold 302, for example, passing through the center of the material 303 a as described above. At the same time, the burr length 409 of the burr 400 appearing at both ends thereof is calculated according to the processing flow of FIG. Then, while rotating the cut surface through the center of the material 303 a and rotating by a minute angle Δθ around an axis substantially perpendicular to the lower surface of the lower mold 302, the burr length 409 at each angular position is calculate. In this case, the mean value of the burr length 409 at each angular position, the maximum value of the burr length 409 at each angular position, and an intermediate value between the maximum and minimum values are used as the burr length in the three-dimensional analysis. be able to.

  Further, in the present embodiment, the data of the burr cross section (bur volume) and the burr length 409 calculated by the burr cross section / length calculation unit 106 is displayed to the user (see FIG. 14) described later. Designers are informed. That is, in the present embodiment, it is possible to quantitatively determine the burr cross section (bur volume) and the burr length 409, and the user can know those values. Therefore, the user can easily evaluate the amount and appearance of the burrs 400 together with the presence or absence of a defect.

  FIG. 13 is a diagram showing an example of a processing flow of the optimization unit 108. The optimization unit 108 is used to optimize design factors (for example, the shape of the forging die 300, the size of the material 303 before forging, the initial arrangement position, and the like) which can be appropriately set by the user (designer).

  As shown in FIG. 13, the optimization unit 108 first selects one of the forging die size data 202, the material size data 203 and the analysis condition data 204 based on the information input by the user via the input / output device 30. The above design factors are selected (step S40). At this time, the selected range of design factor values may be restricted.

  Next, the optimization unit 108 selects one or more objective functions from the burr cross section / length data 209 based on the information input by the user via the input / output device 30. An end condition for optimization is set (step S41). Here, the termination condition of the optimization refers to the target value of the objective function, its allowable range, the number of repetitions, and the like.

  Next, based on the value of the design factor designated by the user, the optimization unit 108 performs the processing of the forging type shape creation unit 102, the material shape creation unit 103, the forging analysis unit 104, and the burr cross section / length calculation unit 106. Each execution is performed to calculate the value of the selected objective function (step S42).

  Next, the optimization unit 108 determines whether the value of the objective function calculated in step S42 satisfies the termination condition (step S43). As a result of the determination, when the value of the objective function does not satisfy the termination condition (No in step S43), the optimization unit 108 changes the value of the design factor (step S44), and the processing in step S42 and subsequent steps is performed. Run again. Although there are various methods for changing the value of the design factor when optimizing the value of the objective function, for example, a program such as a commercially available optimization engine may be used.

  If it is determined in step S43 that the value of the objective function satisfies the termination condition (Yes in step S43), the optimization unit 108 ends the process of the optimization unit 108. Then, the value of the design factor at the end of the process of the optimization unit 108 is taken as the optimal value of the design factor.

  Here, a specific example of design factor optimization is shown below. In the design of the forging die 300, it is required to reduce the amount of the burr 400 as much as possible within the range in which the load and moment applied to the processing device do not exceed the upper limit of the rating of the processing device and not cause missing. Further, in order to reduce the amount of the material 303 as much as possible, it is preferable that the difference (balance) in the appearance of the burrs 400 between the portions of the forging die 300 be as small as possible.

  Therefore, the case where the initial arrangement position of the material 303 is a design factor and the balance of the burrs 400 is an objective function will be described. Here, first, all cross sections of the forging die 300 and the material 303 are considered as an example of the two-dimensional analysis. At this time, the balance of the burrs 400 can be regarded as a difference in the degree of projection of the burrs 400 at diagonal positions (both ends of the same cut surface).

  Therefore, the optimization unit 108 extracts the material position from the material dimension data 203, and from the analysis result data 207, the burr cross-sectional area of the burr 400 and the burr length 409 or both at both ends from which the burr 400 in the same cut surface is emitted. Ask. Then, using these calculated values, the difference in the burr cross-sectional area at both ends from which the burr 400 in the same cut surface exits, the difference in the burr length 409 or both of them are calculated.

  In this example, the difference in burr cross section, the difference in burr length 409, or both represent the balance of the burr 400 and is the objective function of the optimization. However, in the case of three-dimensional analysis, the balance of the burr 400 is, for example, the burr sectional area or burr length of the burr 400 generated at each position of the outer peripheral portion of the material 303 a along the gap between the upper mold 301 and the lower mold 302 It is represented by the dispersion (variance or standard deviation) of the distribution of the light source 409. Alternatively, the total amount (total volume) of the burr 400 may be used as an objective function.

  Here, the determination of the end condition in step S43 will be supplemented. For this determination, the optimization unit 108 creates a response curve (generally, a response surface) of a so-called objective function by repeating the processes of steps S42 to S44. In general, the optimization problem is reduced to the problem of finding the minimum or maximum value of this response curve, and in this example the balance of the burr 400 is minimized.

  Therefore, for example, as a response curve, the optimization unit 108 creates an approximate curve in which the horizontal axis represents the initial arrangement position of the material 303 in the x-axis direction, and the vertical axis represents the balance of the burr 400 (the value of the objective function). In this case, the termination condition of the optimization can be made such that the error between a newly plotted point and this approximate curve is less than or equal to a predetermined threshold. Thereby, the accuracy of the value obtained by optimization can be secured.

  FIG. 14 is a diagram showing an example of the display screen 34 displayed by the display unit 107. As shown in FIG. In the display screen 34, generally, burr judgment condition data 208, burr sectional area / length data 209, forging die shape data 205 satisfying the end condition by the optimization unit 108, material shape data 206, analysis result data 207, etc. Is displayed.

  By the way, in the display screen 34 shown in FIG. 14, the burr judgment line 404 and the burr direction vector 405 which are the burr judgment condition data 208 and the burr length 409 which is the burr cross sectional area / length data 209 are forged shape It is graphically displayed together with partial shapes such as data 205 and material shape data 206.

  In addition, in the text box 320 of the display screen 34, the value of the burr length 409 is displayed as a numerical value. In the text box 320, the value of the burr cross section may be displayed instead of the value of the burr length 409 or both of them may be displayed according to the user's instruction. Furthermore, the values of the burr volume and the burr length obtained by the three-dimensional analysis may be displayed not only in the text box 320 but also in a two-dimensional or three-dimensional graph or diagram.

  In addition, the forging die shape data 205 and the material shape data 206 satisfying the termination condition of the optimization unit 108 may be displayed using a front view, a top view, a side view, etc. It may be displayed in two dimensions. Furthermore, the display unit 107 may store such a front view, a top view, a side view, a perspective view and the like in a file format of a predetermined drawing format. As a result, it is possible to reduce the number of steps of drawing creation work.

  The display of the burr cross-sectional area / length data 209 is performed to confirm whether there is a problem in the value that is the factor of deriving the optimum shape of the forging die 300 and the material 303. As a result of the confirmation by the user, when there is a problem in the analysis condition or the like, the process of the optimization unit 108 may be added with a process of excluding the analysis condition concerned or performing analysis again.

  Further, since the forging die shape data 205 and the material shape data 206 satisfying the end condition of the optimization unit 108 are obtained by the processing result of the optimization unit 108, the response curved surface is used in the optimization unit 108. In the case, it is preferable that the display unit 107 also display the response surface. At this time, if the response surface can not be displayed in multiple dimensions, the data may be processed into a displayable dimension.

  As described above, in the embodiment of the present invention, since the user can appropriately set the burr determination line 404 (bur determination curve) and the burr direction vector 405, the amount and appearance of the burr 400 generated as a result of forging can be determined. It becomes possible to determine quantitatively as a cross-sectional area (burr volume) or a burr length 409. Furthermore, in the present embodiment, in the processing of the optimization unit 108, the user can appropriately select a design factor and appropriately set an objective function, so the amount and appearance of the burr 400 can be optimized. Accordingly, the shapes of the forging die 300 and the material 303 can be efficiently made into the shape desired by the user.

  The present invention is not limited to the embodiments and modifications described above, and further includes various modifications. For example, the embodiments and the modifications described above are described in detail to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the described configurations. In addition, it is possible to replace part of the configuration of one embodiment or modification with the configuration of another embodiment or modification, and another embodiment or modification to the configuration of one embodiment or modification It is also possible to add the configuration of Moreover, it is also possible to add, delete, and replace the configuration included in the other embodiments and the modification for a part of the configuration of each embodiment and the modification.

10 processing apparatus 20 storage apparatus 30 input / output apparatus 31, 32, 33, 34 display screen 100 forging type design support apparatus 101 design basic data input unit (forging simulation section)
102 Forging shape creation part (forging simulation part)
103 Material shape creation part (forging simulation part)
104 Forging Analysis Unit (Forging Simulation Unit)
105 Burr judgment position input unit (validator calculation unit)
106 Burr cross section / length calculator (validator calculator)
107 Display section 108 Optimization section 201 Product shape data 201a Contour shape data 201b after forging allowance added Contour shape data 201c Shaped engraving shape data 201c Die shape data 202 Forging die size data 203 Material dimension data 204 Analysis condition data 205 Forging die shape data 206 Material shape data 207 Analysis result data 208 Burr judgment condition data 209 Burr cross section / length data 300 Forging type 301 Upper mold 302 Lower mold 303, 303a Material 303b Material boundary line 320 Text box 311a, 311b Numerical value input box 312a, 312b Radio Button 313a, 313b Numeric value input box 314a, 314b Text box 400 Bali 404 Bali judgment line 404a Bali A judgment line 404b Bali B judgment line 405 Bali direction vector 405 a Burr A direction vector 405b Burr B direction vector 406a, 406b Product side end 407a, 407b Innermost position 408 Burr outermost position 409 Bur length PL Parting line PS Parting line start point FT Flash thickness

Claims (6)

Comprising a processing unit, a storage unit and an input / output unit;
The processing unit
While inputting the analysis condition data including the product shape data of the forged product, the dimensional data of the forging die, the arrangement position data of the material, the dimensional data of the material, and the parameters of the forging simulation model via the input / output device A forging simulation unit that simulates a process in which the material is forged by the forging die using the input data, and calculates shape data of the material after forging;
The burr judgment condition data indicating the position outside the start point of the parting line for judging the burr generated in the forging process is inputted through the input / output device, and the burr judgment condition data is used. A validator calculation unit which extracts the portion of the burr from the shape data of the material after forging calculated by the forging simulation unit, and calculates the value of at least one data representing the amount or size of the burr;
A forging-type design support device characterized by comprising: The processing unit
The display device according to claim 1, further comprising: a display unit for outputting the value of at least one data representing the amount or size of the burr calculated by the validator calculation unit to the input / output device for display. Forging type design support device. The processing unit
At least one data selected from the dimensional data of the forging die, the dimensional data of the material, the arrangement position data of the material, and the analysis condition data as a design factor, and at least one representing the amount or size of the burr The data processing method according to claim 1, further comprising: an optimization unit that selects data as an objective function and calculates the value of the design factor when the objective function is a minimum value, a maximum value, or its neighboring value. Forging type design support device. A computer comprising a processing unit, a storage unit and an input / output unit;
While inputting the analysis condition data including the product shape data of the forged product, the dimensional data of the forging die, the arrangement position data of the material, the dimensional data of the material, and the parameters of the forging simulation model via the input / output device A forging simulation process of simulating a process in which the material is forged by the forging die using the input data and calculating shape data of the material after forging;
The burr judgment condition data indicating the position outside the start point of the parting line for judging the burr generated in the forging process is inputted through the input / output device, and the burr judgment condition data is used. A validator calculation process of extracting a portion of the burr from the shape data of the material after forging calculated by the forging simulation process, and calculating a value of at least one data representing an amount or a size of the burr;
A forging type design support method characterized by performing. The computer is
The display processing of outputting and displaying the value of at least one data representing the amount or size of the burr calculated by the validator calculation processing to the input / output device is further executed. Forging type design support method. The computer is
At least one data selected from among the dimensional data of the forging die, the dimensional data of the material, the arrangement position data of the material, and the analysis condition data as a design factor, and representing the amount or size of the burr 5. The method according to claim 4, further comprising: performing an optimization process of selecting the objective function as the objective function and calculating the value of the design factor when the objective function becomes the minimum value, the maximum value, or their neighboring values. Forging type design support method.

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