WO2024009484A1 - 制御装置及び制御方法 - Google Patents
制御装置及び制御方法 Download PDFInfo
- Publication number
- WO2024009484A1 WO2024009484A1 PCT/JP2022/027033 JP2022027033W WO2024009484A1 WO 2024009484 A1 WO2024009484 A1 WO 2024009484A1 JP 2022027033 W JP2022027033 W JP 2022027033W WO 2024009484 A1 WO2024009484 A1 WO 2024009484A1
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- search
- program
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J9/00—Program-controlled manipulators
- B25J9/16—Program controls
- B25J9/1679—Program controls characterised by the tasks executed
- B25J9/1684—Tracking a line or surface by means of sensors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J9/00—Program-controlled manipulators
- B25J9/16—Program controls
- B25J9/1656—Program controls characterised by programming, planning systems for manipulators
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Program-control systems
- G05B19/02—Program-control systems electric
- G05B19/42—Recording and playback systems, i.e. in which the program is recorded from a cycle of operations, e.g. the cycle of operations being manually controlled, after which this record is played back on the same machine
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/45—Nc applications
- G05B2219/45104—Lasrobot, welding robot
Definitions
- the present disclosure relates to a control device and a control method.
- a robot system that includes a robot, a work tool such as a welding torch attached to the robot, and a control device that controls the robot is well known.
- the control device drives the robot and the work tool based on the work program, and the user of the robot can teach teaching points in advance to determine the position and posture of the robot during work.
- a work program is created based on the positions of teaching points.
- the location of the teaching point can have a significant impact on the quality of work performed by the robot.
- the robot moves a welding torch attached to a robot arm or the like along a work path determined based on teaching points. If the working path deviates from the desired path, the welding line also deviates from the desired path, resulting in a decrease in processing accuracy.
- a control method in which a sensor is provided in a working tool such as a welding torch, and the working path is corrected while performing work such as welding.
- a working tool such as a welding torch
- the working path is corrected while performing work such as welding.
- a work path is generated in advance by specifying a start point and an end point, and the position of the robot detected by a laser sensor is set as a teaching point while moving the robot along the work path.
- Patent Document 2 a teaching device that simplifies the teaching of the operation of a laser scanner and aims to shorten the welding time of a robot is well known (see, for example, Patent Document 2).
- the technology is designed to optimize the movement path of the robot's end effector by tracking the position of the welding line using a laser sensor, while at the same time moving the work tool along the detected line while welding.
- Robots that perform such tasks are also well known (for example, see Patent Document 3).
- the teaching point can be set by a worker manually moving the robot to a desired position and posture, but the teaching point often requires high accuracy of 1 mm or less, and the worker This requires a high level of skill and can take a lot of time even for experienced workers.
- One way to generate teaching points is to set a search point to determine the next teaching point along the work route based on a certain teaching point.In this method, an accurate work program can be created for a certain workpiece. It is possible to generate However, if you try to execute the same work program on different workpieces on a production line, etc., it will not be possible to deal with dimensional errors or misalignment of each workpiece, and it will be difficult to perform specified work such as welding with high precision. It becomes difficult.
- One aspect of the present disclosure is a control device for controlling a robot having a sensor capable of detecting a work line of a workpiece, comprising: a teaching unit that uses the sensor to teach a search start position and a search end position of the work line; Generate a search program for determining teaching points according to the position of the work line based on the search start position and the search end position, and generate a work program including the teaching points based on the execution result of the search program.
- the robot is configured to be able to specify, at the time of generating the search program, whether or not to execute tracking using the sensor for correcting the position of the robot during the execution of the work program.
- a control device comprising: a designating section;
- Another aspect of the present disclosure is a method for controlling a robot having a sensor capable of detecting a work line of a workpiece, the method comprising: teaching a search start position and a search end position of the work line by the sensor; generating a search program for determining teaching points according to the position of the work line based on the position and the search end position; and generating a work program including the teaching points based on the execution result of the search program. and specifying at the time of generating the search program whether or not to perform tracking using the sensor for correcting the position of the robot during execution of the work program. It's a method.
- FIG. 1 is a schematic configuration diagram of a robot system according to an embodiment.
- FIG. 2 is a schematic diagram illustrating teaching of a search start point and a search end point using a sensor.
- FIG. 7 is a diagram illustrating an example of teaching a search starting point using a user interface.
- FIG. 7 is a diagram illustrating an example of teaching a search end point using a user interface.
- FIG. 3 is a schematic diagram illustrating program correction by tracking.
- FIG. 6 is a schematic diagram illustrating an example of setting an offset amount in teaching a search start point and a search end point.
- FIG. 3 is a diagram showing an example of a user interface for setting various conditions in creating a search program.
- FIG. 3 is a diagram illustrating an example of automatically generating a work program using a user interface.
- 3 is a flowchart illustrating an example of processing related to program generation.
- FIG. 1 is a schematic configuration diagram of a robot system according to a preferred embodiment.
- the robot system 10 includes at least one robot 12, a robot control device 14 that controls the robot 12, and a teaching pendant 16 that is communicably connected to the robot control device 14 by wireless or wire.
- the robot 12 is, for example, an industrial articulated robot, and is configured to have a movable part (robot arm) 18 and a movable part 18 attached to the tip thereof so as to be able to perform a predetermined work on a workpiece (work) 20.
- the sensor 24 includes a work tool 22 that has been moved, and a sensor 24 that can detect the position of a work site (for example, a work line) on the workpiece 20 by the work tool 22.
- the work tool 22 is a welding torch
- the robot system 10 includes a welding power source 26 that supplies current to the welding torch 22 based on a command from the robot controller 14.
- the work line includes the welding part of the workpiece, but the present disclosure is not limited to this.
- the work line includes the sealing part of the workpiece.
- the working tool 22 can also be a nozzle or the like for discharging adhesive.
- the senor 24 includes an emitting section that emits light (e.g., laser light) based on a command from the robot control device 14, and an image sensor (CCD, CMOS) that receives light reflected by the workpiece and converts it photoelectrically.
- It is a laser scanner type three-dimensional sensor (laser sensor) having a three-dimensional sensor (laser sensor), which is attached to the tip of the movable part 18 or the welding torch 22 using an appropriate fixture (not shown), and moves the workpiece along the work line. The work line can be searched by scanning continuously.
- the sensor is not limited to a laser sensor, and any sensor capable of detecting a work line can be used.
- a three-dimensional sensor can also be used. Examples of 3D sensors include TOF (Time of Flight) cameras that capture distance images using the optical time-of-flight method, or stereo cameras that detect 3D positions using parallax captured by two 2D cameras. Available for use.
- TOF Time of Flight
- the robot 12 is configured to be able to perform various processing and operations such as welding based on commands sent from the robot control device 14.
- the robot control device 14 includes a processor and a storage unit (memory, etc.), and can control the robot 12 based on a work program to be described later.
- the robot control device 14 can generate and save a search program, which will be described later, and execute it to control the sensor 24. That is, in this embodiment, the teaching pendant 16 has a function as a teaching section, the processor of the robot control device 14 has a function as a program generation section, and the user interface described later has a function as a specifying section.
- a computer such as a personal computer (PC) 28 connected to the control device 14 by wire or wirelessly and having a processor and a storage unit (memory, etc.) generates each program, The generated program may be sent from the PC 28 to the control device 14.
- PC personal computer
- storage unit memory, etc.
- the teaching pendant 16 includes a reception section such as a keyboard or touch panel that can receive various inputs from the user, and a display section such as a display, and the reception section and the display section may constitute a user interface.
- a reception section such as a keyboard or touch panel that can receive various inputs from the user
- a display section such as a display
- the reception section and the display section may constitute a user interface.
- FIG. 2 is a diagram schematically explaining welding as an example of work performed by the robot 12.
- the shapes of two plate-shaped workpieces 20a and 20b having a predetermined shape are measured using a laser sensor 24 attached to a welding torch 22, and a teaching point is determined based on the information obtained from the sensor 24. It is assumed that the welding line 30 is automatically generated and arc welding is performed along the welding line 30.
- the UI 17 has the functions of a display section that allows the user to visually recognize various information, and a reception section that receives various inputs from the user.
- the UI 17 includes a robot display area 32 that can display a robot image corresponding to the position and orientation of the actual robot 12, a timeline display area 34 that can display icons (described later) arranged in chronological order, and a timeline display area 34 that allows the user to select desired icons.
- the menu display area 36 includes a menu display area 36 in which each icon can be displayed for selection.
- step S1 the user of the robot 12 instructs the robot 12 about the search start position (search start point). Specifically, the user moves the robot 12 so that it is located at a search starting point A (see FIG. 2) where the sensor 24 can detect the welding start position or its vicinity. As shown in FIG. 3, the robot display area 32 can display an image corresponding to the position and orientation of the actual robot 12 moved by the user. After confirming that the robot 12 is located at the search starting point A, the user selects the icon 38 (L) representing the search point from the menu display area 36 and moves it to the timeline display area 34 by drag and drop or other operations. move it to Then, an icon "L" is placed at the left end of the timeline display area 34, which means that the search start position has been taught.
- the icon 38 (L) representing the search point from the menu display area 36 and moves it to the timeline display area 34 by drag and drop or other operations. move it to Then, an icon "L" is placed at the left end of the timeline display area 34, which means that the search start position has been taught.
- the search start position is different from the welding start position (work start position).
- the search start position and the welding start position may end up being the same position.
- the search end position is different from the welding end position (work end position), but may end up being the same position.
- the user selects an icon 40 (Start) representing a search start command from the menu display area 36 and moves it to the timeline display area 34 by an operation such as drag and drop. Then, the icon “Start” is placed to the right of the icon “L” in the timeline display area 34.
- the search start command allows the user to set various parameters in the search program (step S2).
- the search program may include at least one of information regarding the search range of the sensor 24, information regarding the output of the sensor 24, information regarding the route of the sensor 24, and information regarding the automatically generated work program.
- the user can input information about posture changes between teaching points as information about the path of the sensor 24.
- the user can also input information regarding the automatically generated work program, for example, specify the welding speed in the work program.
- the user instructs the robot 12 about the search end position (search end point) (step S3). Specifically, the user moves the robot 12 so that the sensor 24 is located at a search starting point B (see FIG. 2) where the sensor 24 can detect the welding end position or its vicinity.
- the robot display area 32 displays the state of the actual robot 12 moved by the user.
- the user selects the icon 38 (L) representing the teaching point from the menu display area 36 and moves it to the timeline display area 34 by drag and drop or other operations. move it to Then, an icon "L” is placed to the right of the icon “Start” in the timeline display area 34, and this means that the search end position has been taught.
- an icon 42 representing the end of the search from the menu display area 36 and moves it to the timeline display area 34 by drag and drop or other operations. Then, an icon “Stop” is placed at the right end of the timeline display area 34.
- the user can set whether or not to execute a predetermined process when executing a work program to be described later (step S4). For example, as shown in FIG. 7, when the user switches the menu display area 36 from "Programming" to "Details," a search program setting screen is displayed, and the user can specify (input) whether various conditions are valid or invalid. Can be done. Examples of the above-mentioned predetermined processing include tracking, setting of an offset amount, and posture change between teaching points. These processes will be explained below.
- the user can set whether or not to perform tracking by the sensor 24 during execution of a work program for workpieces (for example, workpieces 20c and 20d) other than when the search program is executed. can. If the setting is set to "valid" here, the sensor 24 tracks the workpiece while the work program is being executed, and the motion correction unit corrects the motion of the robot based on the tracking result.
- a work program for workpieces for example, workpieces 20c and 20d
- FIG. 5 is a diagram illustrating the operation of the tool 22 when tracking is set to be performed when a work program is executed.
- a work program is generated by executing a search program on the workpieces 20a and 20b
- tracking is performed when this work program is used for work (welding, etc.) on the workpieces 20a and 20b.
- this work program is used for work (welding, etc.) on the workpieces 20a and 20b.
- the workpieces 20c and 20d even if the workpieces 20c and 20d have the same specifications as the workpieces 20a and 20b, they may not be accurate due to dimensional errors, installation errors, thermal deformation, etc. You may not be able to work.
- the user can set conditions regarding the offset during tracking from the work line 30. For example, the user can set the offset amount during tracking in which direction with respect to the tool 22 (the traveling direction, the direction perpendicular to the traveling direction, the direction in which the tool itself extends, etc.). If offset settings have been made, when a work program is executed for the works 20a and 20b as illustrated in FIG. The tool 22 moves. For example, in arc welding, sometimes a higher quality weld can be achieved by having the tool follow a line that is somewhat offset from the work line rather than following the work line itself; The work line offset function is very convenient.
- the user can select and specify the purpose of the generated work program. For example, when the user selects "arc”, the "welding start command” and “welding end command” are automatically taught to the work program, improving convenience for the user. On the other hand, if nothing is specified, the work program will contain only the robot's motion statements.
- the user can set conditions regarding the change in the posture of the tool. For example, when the above-mentioned tracking corrects only the position of the tool (that is, does not correct the posture of the tool), it may be difficult to ensure the accuracy of the posture. In such a case, it is effective to use a work program that reduces the distance between taught points in sections where the change in tool posture is relatively large, and increases the interval between taught points in sections where the change in posture is relatively small. Therefore, as shown in FIG. 7, the user can easily create the above-mentioned work program by setting the upper limit of posture change between teaching points.
- the search program can be displayed as a series of icons arranged and displayed in chronological order within the timeline display area 34.
- the user can create a search program through visually and intuitively easy-to-understand operations via the teaching operation panel (UI). Therefore, even if the user is not an expert, he or she can create the desired search program. can be created in a short time with simple operations.
- the user taught the search start point and the search end point by directly moving the robot with his or her hand (so-called direct teaching); however, the present disclosure is not limited to this, and the user may move the robot by jogging, for example. You can also do it.
- various conditions are set in step S4 before the search program is executed.
- the user can add any point in addition to the search start point and search end point.
- at least one intermediate point can be taught between the search start point and the search end point, and furthermore, the operation mode of the torch can also be set in a straight line.
- the movement is not limited to this, and the movement can also be performed along an arc, for example. Information regarding these intermediate points can also be displayed as icons.
- step S6 the search program generated in step S5 is executed.
- the scanning laser is irradiated from the sensor 24 toward the work in the section from the search start position to the search end position, and at least one teaching point is generated in the same section.
- a work program including teaching points is automatically generated (step S7).
- the search program can also be executed by the user through the UI 17.
- a work program including the generated teaching points is automatically generated.
- the work program is displayed in the timeline display area 34 as a combination of icons 48.
- the work program 48 includes an icon 54a representing the start of welding, an icon 54d representing the end of welding, and icons 54b and 54c between them representing each teaching point in the welding work, and these icons are arranged on a timeline. They are displayed in chronological order within the display area 34.
- icons 54a representing the start of welding
- icons 54d representing the end of welding
- icons 54b and 54c between them representing each teaching point in the welding work
- the user can check and edit the automatically generated work program via the UI 17 of the teaching pendant 16. For example, by clicking on any of the icons 54a to 54d in the timeline display area 34, various icons containing work information etc. are displayed in the menu display area 36, and the user can perform work such as correcting the position of the teaching point. You will be able to set and change various parameters within the program.
- the UI 17 also reflects settings such as whether or not to perform the above-mentioned tracking.
- the tracking start command and tracking end command are displayed as icons 51 and 52, respectively. These icons can also be displayed in a timeline format along with the above-mentioned icons 54a-54d, making it very easy for the user to understand.
- step S8 the robot is controlled based on the work program.
- step S9 the tracking and other processes set as valid in step S4 are included as commands in the work program, those processes are also executed (step S9). This allows the robot to perform predetermined work such as welding based on the automatically generated work program.
- the user's teaching work in creating a search program for generating teaching points is greatly simplified by visual operation/input via the UI. Therefore, even an inexperienced user can create a desired search program in a short time with simple operations, and furthermore, by executing the search program, appropriate teaching points (work programs) can be automatically generated.
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Abstract
Description
12 ロボット
14 ロボット制御装置
16 教示操作盤
17 ユーザインタフェース
18 ロボットアーム
20 ワーク
22 溶接トーチ
24 センサ
26 溶接電源
28 PC
30 作業線
32 ロボット表示領域
33 オフセット作業線
34 タイムライン表示領域
36 メニュー表示領域
38、40、42、51、52 アイコン
48 作業プログラム
54a-54d 教示点
Claims (5)
- ワークの作業線を検出可能なセンサを有するロボットを制御する制御装置であって、
前記センサによって前記作業線の探索開始位置及び探索終了位置を教示する教示部と、
前記探索開始位置及び前記探索終了位置に基づいて、前記作業線の位置に応じた教示点を定めるための探索プログラムを生成し、前記探索プログラムの実行結果に基づいて、前記教示点を含む作業プログラムを生成するプログラム生成部と、
前記作業プログラムの実行中に前記ロボットの位置を補正するための、前記センサを用いたトラッキングを実行するか否かを、前記探索プログラムの生成時に指定できるように構成された指定部と、
を備える制御装置。 - 前記指定部は、前記作業プログラムの生成において前記作業線をオフセットさせるためのオフセット量を指定できるように構成されている、請求項1に記載の制御装置。
- 前記指定部は、前記作業プログラムの生成において前記作業プログラムの用途を指定できるように構成されている、請求項1に記載の制御装置。
- 前記指定部は、前記作業プログラムの生成において、前記ロボットの姿勢変化に関する条件を指定できるように構成されている、請求項1に記載の制御装置。
- ワークの作業線を検出可能なセンサを有するロボットの制御方法であって、
前記センサによって前記作業線の探索開始位置及び探索終了位置を教示することと、
前記探索開始位置及び前記探索終了位置に基づいて、前記作業線の位置に応じた教示点を定めるための探索プログラムを生成することと、
前記探索プログラムの実行結果に基づいて、前記教示点を含む作業プログラムを生成することと、
前記作業プログラムの実行中に前記ロボットの位置を補正するための、前記センサを用いたトラッキングを実行するか否かを、前記探索プログラムの生成時に指定することと、
を含む制御方法。
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE112022007100.1T DE112022007100T5 (de) | 2022-07-07 | 2022-07-07 | Vorrichtung und verfahren zur steuerung |
| PCT/JP2022/027033 WO2024009484A1 (ja) | 2022-07-07 | 2022-07-07 | 制御装置及び制御方法 |
| JP2024531870A JPWO2024009484A1 (ja) | 2022-07-07 | 2022-07-07 | |
| CN202280097644.XA CN119451784A (zh) | 2022-07-07 | 2022-07-07 | 控制装置以及控制方法 |
| TW112121434A TW202402486A (zh) | 2022-07-07 | 2023-06-08 | 控制裝置及控制方法 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2022/027033 WO2024009484A1 (ja) | 2022-07-07 | 2022-07-07 | 制御装置及び制御方法 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024009484A1 true WO2024009484A1 (ja) | 2024-01-11 |
Family
ID=89453110
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2022/027033 Ceased WO2024009484A1 (ja) | 2022-07-07 | 2022-07-07 | 制御装置及び制御方法 |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPWO2024009484A1 (ja) |
| CN (1) | CN119451784A (ja) |
| DE (1) | DE112022007100T5 (ja) |
| TW (1) | TW202402486A (ja) |
| WO (1) | WO2024009484A1 (ja) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07104831A (ja) * | 1993-10-08 | 1995-04-21 | Fanuc Ltd | レーザセンサを用いたロボットの自動位置教示方法 |
| JPH11207671A (ja) * | 1998-01-28 | 1999-08-03 | Hitachi Ltd | 産業用ロボットの教示装置 |
| JP2021058988A (ja) * | 2019-10-09 | 2021-04-15 | 川崎重工業株式会社 | 補正システム、補正方法、ロボットシステム及び制御装置 |
| WO2022114016A1 (ja) * | 2020-11-30 | 2022-06-02 | ファナック株式会社 | 直接教示操作にて教示点を教示する教示装置、ロボット制御装置、および教示装置のコンピュータプログラム |
-
2022
- 2022-07-07 CN CN202280097644.XA patent/CN119451784A/zh active Pending
- 2022-07-07 DE DE112022007100.1T patent/DE112022007100T5/de active Pending
- 2022-07-07 WO PCT/JP2022/027033 patent/WO2024009484A1/ja not_active Ceased
- 2022-07-07 JP JP2024531870A patent/JPWO2024009484A1/ja active Pending
-
2023
- 2023-06-08 TW TW112121434A patent/TW202402486A/zh unknown
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07104831A (ja) * | 1993-10-08 | 1995-04-21 | Fanuc Ltd | レーザセンサを用いたロボットの自動位置教示方法 |
| JPH11207671A (ja) * | 1998-01-28 | 1999-08-03 | Hitachi Ltd | 産業用ロボットの教示装置 |
| JP2021058988A (ja) * | 2019-10-09 | 2021-04-15 | 川崎重工業株式会社 | 補正システム、補正方法、ロボットシステム及び制御装置 |
| WO2022114016A1 (ja) * | 2020-11-30 | 2022-06-02 | ファナック株式会社 | 直接教示操作にて教示点を教示する教示装置、ロボット制御装置、および教示装置のコンピュータプログラム |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2024009484A1 (ja) | 2024-01-11 |
| CN119451784A (zh) | 2025-02-14 |
| TW202402486A (zh) | 2024-01-16 |
| DE112022007100T5 (de) | 2025-04-24 |
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