WO2025041248A1 - Dispositif d'enseignement et procédé d'enseignement - Google Patents

Dispositif d'enseignement et procédé d'enseignement Download PDF

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Publication number
WO2025041248A1
WO2025041248A1 PCT/JP2023/030093 JP2023030093W WO2025041248A1 WO 2025041248 A1 WO2025041248 A1 WO 2025041248A1 JP 2023030093 W JP2023030093 W JP 2023030093W WO 2025041248 A1 WO2025041248 A1 WO 2025041248A1
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WO
WIPO (PCT)
Prior art keywords
teaching
bending
line segments
line
vertices
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/JP2023/030093
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English (en)
Japanese (ja)
Inventor
恭平 小窪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fanuc Corp
Original Assignee
Fanuc Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fanuc Corp filed Critical Fanuc Corp
Priority to PCT/JP2023/030093 priority Critical patent/WO2025041248A1/fr
Priority to CN202380101406.6A priority patent/CN121713182A/zh
Priority to TW113128081A priority patent/TW202508732A/zh
Publication of WO2025041248A1 publication Critical patent/WO2025041248A1/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/26—Program-control arrangements
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/10—Geometric CAD
    • G06F30/12—Geometric CAD characterised by design entry means specially adapted for CAD, e.g. graphical user interfaces [GUI] specially adapted for CAD

Definitions

  • This disclosure relates to a teaching device and teaching method for specifying lines for bending sheet metal.
  • a technique for simulating bending by specifying bending lines (line segments) for a two-dimensional polygon that represents a metal sheet.
  • the bending lines and the order in which bending is performed are determined by an operator.
  • a technique is known that detects multiple possible bending sequences for manufacturing a sheet metal part and possible bending dies to be used in each bending process of each possible bending sequence based on a development view of the sheet metal part, and displays the multiple possible bending sequences, thereby making it possible to optimally determine the bending sequence and bending dies for the sheet metal part in accordance with the specific circumstances of a bending factory.
  • FIG. 6 is a diagram showing an example of a teaching screen showing the shape of the metal sheet before bending.
  • the shape of the sheet metal before bending is a polygon composed of a plurality of vertices J1 to J8 and a plurality of line segments with the vertices at both ends.
  • an operator selects two vertices on a teaching screen using an input device such as a mouse or a touch panel, and the line segments (bending lines) to be bent are determined so as to divide the polygon of the sheet metal into two regions. That is, in the conventional technology, as shown in FIG. 7, when an operator first selects vertices J3 and J6 and then selects a line segment between vertices J2 and J7, the line segment connecting vertices J3 and J6 is designated as the line segment to be bent first, and the line segment connecting vertices J2 and J7 is designated as the line segment to be bent second. In FIG. 7, the order of the line segments to be bent is indicated by the numbers "1" and "2".
  • a three-dimensional simulation is used to confirm the process in which the sheet metal is deformed by bending in the designated order, and a check is performed to see whether the tool and the sheet metal interfere with each other during processing.
  • the conventional bending simulation requires sequential bending for each of the two bend lines.
  • the conventional bending simulation when two or more line segments are on one straight line as shown in Fig. 8, there is no means for simultaneously bending the sheet metal.
  • the device when specifying lines for bending a planar area that divides a metal sheet, the device collectively selects multiple lines that exist on the same straight line by selecting both ends of the most extreme ends of the multiple lines.
  • One aspect of the teaching method disclosed herein is a teaching method executed by a computer, in which when specifying lines for bending a planar area representing a metal sheet that divides the area, the method collectively selects multiple line segments by selecting both ends of the most extreme ends of the multiple line segments that exist on the same straight line.
  • FIG. 2 is a diagram illustrating an example of a functional block configuration of a teaching device according to an embodiment.
  • FIG. 13 is a diagram showing an example of a teaching screen.
  • FIG. 13 is a diagram illustrating an example of vertex selection.
  • FIG. 13 is a diagram illustrating an example of vertex selection.
  • 4 is a flowchart illustrating a teaching process of the teaching device.
  • FIG. 13 is a diagram showing an example of a teaching screen showing the shape of a metal sheet before bending;
  • FIG. 13 is a diagram showing an example of designation of a line segment to be bent;
  • FIG. 13 is a diagram showing an example of designation of a line segment to be bent;
  • FIG. 1 is a diagram illustrating an example of a functional block configuration of a teaching device according to an embodiment.
  • the teaching device 10 is a device that receives a selection of vertices from an operator on a teaching screen of CAD data showing the shape of a metal sheet in order to perform a bending simulation, and determines one or more line segments based on the selected vertices.
  • the teaching device 10 is a computer, a tablet terminal, or the like, and includes a CPU 11, a storage unit 12, a display unit 13, an input unit 14, and a bus 15.
  • the CPU 11 also includes a vertex acquisition unit 110 and a bend line determination unit 111.
  • the storage unit 12 is a read only memory (ROM), a solid state drive (SSD), a hard disk drive (HDD), or the like, and stores CAD data 121.
  • the CAD data 121 stores in advance a CAD file that is created by a CAD device (not shown) and indicates the shape of the metal sheet to be subjected to bending simulation processing.
  • the storage unit 12 may store a line segment list that includes selected line segments to be bent, as described below.
  • the display unit 13 is a display device such as a liquid crystal display, and displays a teaching screen that shows the CAD file of the sheet metal and instructs the lines to be bent.
  • the input unit 14 is, for example, a mouse, a keyboard, or a touch panel arranged on the display unit 13, and receives input from the operator.
  • the CPU 11 is a processor that provides overall control of the teaching device 10.
  • the CPU 11 reads the system program stored in the memory unit 12 and the application programs stored in the various software via the bus 15, and controls the entire teaching device 10 in accordance with the system program and the application program.
  • the CPU 11 is configured to realize the functions of a vertex acquisition unit 110 and a bending line determination unit 111.
  • the vertex acquisition unit 110 when the vertex acquisition unit 110 receives a teaching instruction for a line segment to be bent, including a designation of a metal sheet, based on an input operation of an operator via the input unit 14, the vertex acquisition unit 110 reads a CAD file indicating the shape of the designated metal sheet from the CAD data 121.
  • the vertex acquisition unit 110 displays the read CAD file on the display unit 13 as a teaching screen.
  • 2 is a diagram showing an example of a teaching screen, in which the shape of the metal sheet is the same as that in FIG.
  • the vertex acquiring unit 110 acquires, for a planar area representing the sheet metal on the teaching screen, vertices J3 and J6, which are the two ends of a line segment that performs bending processing and divides the area, based on, for example, an input operation by an operator via the input unit 14.
  • the vertex acquiring unit 110 outputs the acquired vertex J3 and vertex J6 to a bending line determining unit 111, which will be described later.
  • the bend line determination unit 111 determines a line segment having the acquired vertex J3 as a start point and the acquired vertex J6 as an end point, for example, as shown in Fig. 3. However, as shown in Fig. 3, among the line segments connecting the vertices J3 and J6, the line segment connecting the vertices J3' and J6' is not inside the sheet metal area, but the line segment connecting the vertices J3 and J3' and the line segment connecting the vertices J6' and J6 are on the same straight line, and the area connecting the vertices J3, J4, J4', and J3' and the area connecting the vertices J6', J5', J5, and J6 are common to the sheet metal area, so the bend line determination unit 111 collectively selects the line segments J3J3' and J6'J6 to be bent at the same time.
  • the bend line determination unit 111 may add the collectively selected line segments J3J3' and J6'J6 to a line segment list (not shown) stored in the storage unit 12. In this way, the teaching device 10 can select a vertex of a line segment only once, instead of selecting the vertex multiple times, and can collectively select multiple line segments to be bent at the same time.
  • bending line determination unit 111 determines that vertex J3' cannot be selected because the area including vertex J3' is not a line segment but is only a point. In this case, bending line determination unit 111 may display an error indicating that selection is not possible on display unit 13.
  • FIG. 5 is a flowchart illustrating the teaching process of the teaching device 10. The flow shown here is executed every time a teaching instruction is received from an operator.
  • step S11 when the vertex acquisition unit 110 receives an instruction from the operator to teach the line segment to be bent, including the designation of the sheet metal, it reads a CAD file indicating the shape of the specified sheet metal from the CAD data 121, and displays the read CAD file as a teaching screen on the display unit 13. Based on the input operation of the operator via the input unit 14, the vertex acquisition unit 110 acquires two vertices that are the two ends of the line segment to be bent, which divides the planar area representing the sheet metal on the teaching screen.
  • step S12 the bend line determination unit 111 determines whether the positions of the two vertices acquired in step S11 are different. If the positions of the two vertices are different, the process proceeds to step S13. On the other hand, if the positions of the two vertices are the same, the process proceeds to step S17.
  • step S13 the bend line determination unit 111 determines whether one or more line segments connecting the two vertices are collinear and whether the area containing each of the two vertices is common to the sheet metal area. If one or more line segments connecting the two vertices are collinear and the area containing each of the two vertices is common to the sheet metal area, processing proceeds to step S14. On the other hand, if one or more line segments connecting the two vertices are not collinear or the area containing each of the two vertices is not common to the sheet metal area, processing proceeds to step S17.
  • step S14 the bend line determination unit 111 determines whether or not one or more line segments connecting the two vertices intersect with an already selected line segment. If one or more line segments connecting the two vertices intersect with an already selected line segment, the process proceeds to step S17. On the other hand, if one or more line segments connecting the two vertices do not intersect with an already selected line segment, the process proceeds to step S15.
  • step S15 the bend line determination unit 111 adds the selected line segment or segments to a line segment list (not shown).
  • step S16 the bend line determination unit 111 displays on the display unit 13 whether or not to add a line segment, and determines whether or not an additional instruction has been received from the operator via the input unit 14. If an additional instruction has been received from the operator, the process returns to step S11. On the other hand, if an end instruction has been received from the operator, the teaching device 10 ends the teaching process. Then, the teaching device 10 outputs the line segment list to an external device that executes the bending process simulation.
  • step S17 the bend line determination unit 111 displays an error indicating that the selection is not possible on the display unit 13.
  • the teaching device 10 ends the teaching process.
  • the teaching device 10 can collectively select multiple line segments that are arranged on a single straight line and are to be bent simultaneously as a pre-processing step for bending simulation.
  • the teaching device 10 is a device different from an external device (not shown) that executes a bending simulation, but the present invention is not limited to this.
  • the teaching device 10 may be included in an external device (not shown) that executes a bending simulation.
  • each function included in the teaching device 10 can be realized by hardware, software, or a combination of these.
  • being realized by software means being realized by a computer reading and executing a program.
  • Non-transitory computer readable media include various types of tangible storage media. Examples of non-transitory computer readable media include magnetic recording media (e.g., flexible disks, magnetic tapes, hard disk drives), magneto-optical recording media (e.g., magneto-optical disks), CD-ROMs (Read Only Memory), CD-Rs, CD-R/Ws, and semiconductor memories (e.g., mask ROMs, PROMs (Programmable ROMs), EPROMs (Erasable PROMs), flash ROMs, RAMs).
  • the program may also be provided to the computer by various types of temporary computer readable media. Examples of temporary computer readable media include electrical signals, optical signals, and electromagnetic waves.
  • the temporary computer readable medium can provide the program to the computer via a wired communication path such as an electric wire or optical fiber, or via a wireless communication path.
  • the step of writing the program to be recorded on the recording medium includes not only processes that are performed chronologically according to the order, but also processes that are not necessarily performed chronologically but are executed in parallel or individually.
  • the step of writing the program may also be performed by cloud computing.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Theoretical Computer Science (AREA)
  • Mathematical Analysis (AREA)
  • Computational Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Mathematical Optimization (AREA)
  • Pure & Applied Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Evolutionary Computation (AREA)
  • General Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Manipulator (AREA)
  • Numerical Control (AREA)

Abstract

La présente invention sélectionne collectivement une pluralité de segments de ligne qui sont agencés sur une ligne droite et qui sont soumis à un processus de pliage simultané, en tant que préprocessus de simulation de processus de pliage.　Lors de la désignation d'un segment de ligne à soumettre à un processus de pliage pour diviser la région par rapport à une région plane qui représente un métal en feuille, ce dispositif d'enseignement sélectionne les deux extrémités extrêmes d'une pluralité de segments de ligne qui existent sur la même ligne droite, ce qui permet de sélectionner collectivement la pluralité de segments de ligne.
PCT/JP2023/030093 2023-08-22 2023-08-22 Dispositif d'enseignement et procédé d'enseignement Pending WO2025041248A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/JP2023/030093 WO2025041248A1 (fr) 2023-08-22 2023-08-22 Dispositif d'enseignement et procédé d'enseignement
CN202380101406.6A CN121713182A (zh) 2023-08-22 2023-08-22 示教装置以及示教方法
TW113128081A TW202508732A (zh) 2023-08-22 2024-07-29 教示裝置及教示方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2023/030093 WO2025041248A1 (fr) 2023-08-22 2023-08-22 Dispositif d'enseignement et procédé d'enseignement

Publications (1)

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WO2025041248A1 true WO2025041248A1 (fr) 2025-02-27

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CN (1) CN121713182A (fr)
TW (1) TW202508732A (fr)
WO (1) WO2025041248A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11202919A (ja) * 1998-01-07 1999-07-30 Shigeru Aomura 板金ｃａｄ図面からの立体図作成方法及びそのプログラムを記憶した記憶媒体
JP2008151606A (ja) * 2006-12-15 2008-07-03 Juki Corp 画像処理方法および画像処理装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11202919A (ja) * 1998-01-07 1999-07-30 Shigeru Aomura 板金ｃａｄ図面からの立体図作成方法及びそのプログラムを記憶した記憶媒体
JP2008151606A (ja) * 2006-12-15 2008-07-03 Juki Corp 画像処理方法および画像処理装置

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
"Master AutoCAD Perfect Book Trouble! & All Useful Tricks, first edition", 21 March 2018, IMPRESS HOLDINGS, INC., JP, ISBN: 978-4-295-00336-6, article YANO, ETSUKO ET AL.: "Linking More than One Collinear Line Segment", pages: 158, XP009561952 *
KOGUCHI, ATSUSHI : " Automated Process Planning for Sheet Metal Bending by Handling Robot - Process Planning Method by Taking Critical Dimension into Account ", JOURNAL OF THE JAPAN SOCIETY OF PRECISION ENGINEERING, vol. 68, no. 4, 5 April 2002 (2002-04-05), pages 602 - 607, XP093282097 *

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CN121713182A (zh) 2026-03-20
TW202508732A (zh) 2025-03-01

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