EP3697578A1 - Ermittlung einer antriebsreferenzstellung eines zangenantriebs - Google Patents
Ermittlung einer antriebsreferenzstellung eines zangenantriebsInfo
- Publication number
- EP3697578A1 EP3697578A1 EP18773994.1A EP18773994A EP3697578A1 EP 3697578 A1 EP3697578 A1 EP 3697578A1 EP 18773994 A EP18773994 A EP 18773994A EP 3697578 A1 EP3697578 A1 EP 3697578A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drive
- pliers
- driving force
- determining
- reference position
- 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.)
- Withdrawn
Links
Classifications
-
- 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
- B25J9/1612—Program controls characterised by the hand, wrist, grip control
-
- 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
- G05B2219/39—Robotics, robotics to robotics hand
- G05B2219/39005—Feedback for stability of manipulator, felt as force reflection
-
- 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
- G05B2219/39—Robotics, robotics to robotics hand
- G05B2219/39478—Control force and posture of hand
-
- 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
- G05B2219/39—Robotics, robotics to robotics hand
- G05B2219/39505—Control of gripping, grasping, contacting force, force distribution
-
- 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
- G05B2219/39—Robotics, robotics to robotics hand
- G05B2219/39528—Measuring, gripping force sensor build into hand
-
- 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
- G05B2219/40—Robotics, robotics mapping to robotics vision
- G05B2219/40583—Detect relative position or orientation between gripper and currently handled object
-
- 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
- G05B2219/40—Robotics, robotics mapping to robotics vision
- G05B2219/40618—Measure gripping force offline, calibrate gripper for gripping force
Definitions
- the present invention relates to a method and system for determining a drive reference position of a drive of a pair of pliers or a thickness of a component, in particular a force sensor, using the pliers and a computer program product for carrying out the method.
- Time of a zero crossing of a straight line corresponds to a time lag error function.
- Object of the present invention is to determine a
- the drive reference position for closing the pliers indicates the position in which the pliers are closing.
- the drive reference position for closing the pliers reliable (er), precise (er) and / or with low (re) m, in particular
- the pliers is in one embodiment a manufacturing, in particular welding ß-, clinching or crimping pliers, in particular a pair of pliers, in particular X-forceps, with two movably mounted arms or pliers, in particular C-forceps, with a fixed and a movable arm.
- the pliers can also be a manufacturing, in particular welding ß-, clinching or crimping pliers, in particular a pair of pliers, in particular X-forceps, with two movably mounted arms or pliers, in particular C-forceps, with a fixed and a movable arm.
- the pliers can also be a manufacturing, in particular welding ß-, clinching or crimping pliers, in particular a pair of pliers, in particular X-forceps, with two movably mounted arms or pliers, in particular C-forceps, with a fixed and a movable arm.
- the pliers
- Handling tongs in particular a gripper for friction and / or positive lifting and / or holding loads.
- the pliers are arranged on a robot, in particular non-destructively releasably coupled thereto, the method then in a
- Execution is carried out at least partially by a controller of the robot.
- the robot has at least six, in particular at least seven, actuated (moving) axes, in particular rotary joints.
- the present invention becomes (also) or used in an initial or Clearjustage the forceps or the robot, since advantageously no prior knowledge is required.
- the drive is an electric, in particular electromotive, drive.
- the present invention can be realized particularly advantageous, since in particular driving forces and / or positions reliably (he), precise (he) and / or with low (re) m, especially sensory, effort can be specified or determined.
- the drive can also be a
- a drive force may depend on or be indicative of a drive torque, in particular an engine torque of an especially electric gun motor, in particular such a drive torque.
- (Drive) Torque limitation include, in particular, be in one
- the elasticity behavior can be determined more precisely by more than two pairs of values of the drive force-drive position function, in particular a linear approximation of the elastic behavior using a, in particular linear, compensation calculation with more than two value pairs. Accordingly, in one embodiment, the method comprises the steps of:
- the forceps is for applying the first driving force, for applying the second driving force and / or for
- the influence of stick-slip effects and the like can be at least partially reduced and thus the precision (further) improved.
- the method comprises applying the
- first, second and / or at least one further driving force is predetermined on the basis of this actuating force.
- the first driving force is at least 1, 1 times, in particular at least 1, 2 times, and / or at most three times, in particular at most twice, the actuating force.
- the second driving force is predetermined on the basis of the first driving force and thus indirectly on the basis of the actuating force. Additionally or alternatively, in one embodiment, the second drive force is at least the
- the risk of excessive loading by applying the closed pliers to the first, second or at least one further driving force can be reduced.
- the first drive force, the second drive force and / or the at least one further drive force are predetermined by means of a drive limit. Additionally or alternatively, in one embodiment, the actuation force is determined by means of a drive limit.
- the drive reference position is determined using a linear
- a drive reference position for the obstacle-free closing of the empty pliers can be determined and for adjustment or
- Control in particular control, of the drive can be used. Accordingly, in one embodiment, the drive, which is especially adjusted in this manner, is controlled, in particular regulated, on the basis of the determined drive reference position for closing the clamp.
- a thickness of a component can also be determined using the pliers. As a result, it is particularly advantageous to determine a thickness of a force sensor with which a forceps drive position function can be calibrated, wherein the thickness of the force sensor used for calibration as an offset of
- Method for determining a thickness of a component with the aid of the forceps in particular for determining a thickness of a force sensor, in particular for calibrating the drive by means of the force sensor, which, in particular successive, steps:
- Determining the thickness of the component on the basis of, in particular as, difference of the first and second drive reference position.
- a system in particular hardware and / or software, in particular program technology, is set up to carry out a method described here and / or has: Means for applying the closed pliers by means of the drive with a first driving force;
- the system or its agent has:
- system or its means comprises: means for closing the opened forceps to apply the first, second, and / or at least one further driving force by means of the drive;
- the system or its agent comprises:
- a means in the sense of the present invention may be designed in terms of hardware and / or software, in particular a data or signal-connected, preferably digital, processing, in particular microprocessor unit (CPU) and / or a memory and / or bus system or multiple programs or program modules.
- the CPU may be configured to execute instructions implemented as a program stored in a memory system, to capture input signals from a data bus, and / or
- a storage system may comprise one or more, in particular different, storage media, in particular optical, magnetic, solid state and / or other non-volatile media.
- the program may be such that it is capable of embodying or executing the methods described herein, so that the CPU may perform the steps of such methods and, in particular, control, particularly control, the drive and / or robot.
- a computer program product may include, in particular, a non-volatile storage medium for storing a program or a program stored thereon, wherein execution of this program causes a system or a controller, in particular a computer, to do so method described herein or one or more of its steps.
- one or more, in particular all, steps of the method are completely or partially automated, in particular by the system or its (e) means.
- the system includes the forceps and / or the robot. Further advantages and features emerge from the subclaims and the exemplary embodiments. This shows, partially schematized:
- Fig. 1 a system according to an embodiment of the present invention.
- FIG. 1 shows a system according to an embodiment of the present invention with a robot 20, on the flange of a pair of pliers 10 is fixed, which has a drive 1 1, which moves a gun arm 12 in different drive positions x.
- Pliers drive 1 1 and robot 20 are controlled by a robot controller 30, wherein in a modification, both can also be controlled or regulated by separate controls.
- Fig. 2 shows a method according to an embodiment of the present invention.
- a counter i is zeroed and a maximum (permissible) drive torque T max for the drive 1 1 on an initial, very small value T max , 0 set.
- step S35 the maximum permissible driving torque T max is increased in small steps AT until the pincers starts to move due to the commanded targeting Axson (FIG. S30: "Y").
- step S45 the pliers in a step S45 then by a certain amount ß, for example, 5mm, ascended, and the method, starting again with step S10 performed.
- ß for example, 5mm
- step S20 in which the target feed Ax so n is again commanded. Due to the increased maximum (permissible) en drive torque while the static friction is overcome (S30: “Y”) and due to the opening of the pliers by the small predetermined amount ⁇ compared to the already reached closed position the commanded Sollzu ein Ax so n not to the predetermined percentage ⁇ reached (S40: "N") before the clamp closes again.
- S30: "Y” the commanded Sollzu ein Ax so n not to the predetermined percentage ⁇ reached
- step S75 the process is repeated beginning with step S75, with the clamp again opened by ⁇ , the counter i incremented to 2, and the maximum (allowable) drive torque by the factor of the first drive torque ⁇ and current maximum drive torque, respectively ⁇ is increased.
- Compensation calculation can be determined, for example, according to the above equation (2).
- Calibrating the drive is, as indicated by dashed lines in FIG. 1, after the above-described determination of the (first) drive reference position x 0 for closing the (empty) forceps the above-described method performed again, but the forceps when closing the component or the force sensor 40 summarizes and this analog a second drive reference position x ' 0 and the thickness is determined as the difference x 0 - x'o.
Landscapes
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Robotics (AREA)
- Mechanical Engineering (AREA)
- Manipulator (AREA)
- Automatic Assembly (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102017009816.6A DE102017009816B4 (de) | 2017-10-20 | 2017-10-20 | Ermittlung einer Antriebsreferenzstellung eines Zangenantriebs |
| PCT/EP2018/075456 WO2019076573A1 (de) | 2017-10-20 | 2018-09-20 | Ermittlung einer antriebsreferenzstellung eines zangenantriebs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3697578A1 true EP3697578A1 (de) | 2020-08-26 |
Family
ID=63683177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP18773994.1A Withdrawn EP3697578A1 (de) | 2017-10-20 | 2018-09-20 | Ermittlung einer antriebsreferenzstellung eines zangenantriebs |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3697578A1 (de) |
| CN (1) | CN111511507B (de) |
| DE (1) | DE102017009816B4 (de) |
| WO (1) | WO2019076573A1 (de) |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3761344B2 (ja) * | 1998-12-01 | 2006-03-29 | トヨタ自動車株式会社 | 溶接ガンとそれを用いたセンサー校正方法、溶接制御方法、溶接打点位置精度変化管理方法 |
| DE102006016196A1 (de) * | 2006-04-06 | 2007-10-18 | Kuka Roboter Gmbh | Verfahren und Vorrichtung zum Ermitteln der Übersetzung von Antrieben zur Übertragung einer Anpresskraft |
| CN100999077A (zh) * | 2006-12-28 | 2007-07-18 | 中国科学院合肥物质科学研究院 | 一种多用途形状自适应机器人手爪及工作方法 |
| JP4394139B2 (ja) * | 2007-07-03 | 2010-01-06 | ファナック株式会社 | スポット溶接ガンの加圧力の異常を診断する方法 |
| DE202010005418U1 (de) * | 2009-05-12 | 2010-09-30 | Kuka Systems Gmbh | Kalibriereinrichtung |
| DE102011003539A1 (de) * | 2011-02-02 | 2012-08-02 | Kuka Roboter Gmbh | Verfahren zum Referenzieren einer Antriebsstellung wenigstens eines elektrischen Antriebs |
| DE102011122513A1 (de) * | 2011-12-29 | 2013-07-04 | Robert Bosch Gmbh | Widerstandsschweißeinrichtung und Betriebsverfahren |
| TWI483819B (zh) * | 2012-12-25 | 2015-05-11 | Ind Tech Res Inst | 夾爪裝置及其控制方法 |
| DE102014019187A1 (de) * | 2014-12-19 | 2016-06-23 | Kuka Roboter Gmbh | Verfahren und Vorrichtung zum Steuern einer Antriebsanordnung zum Bewegen eines, insbesondere robotergeführten, Werkzeugs |
| JP6468871B2 (ja) * | 2015-02-03 | 2019-02-13 | キヤノン株式会社 | ロボットハンド制御方法及びロボット装置 |
| WO2017162280A1 (en) | 2016-03-23 | 2017-09-28 | Abb Schweiz Ag | Robot and method for calibrating the electrical current of the servomotor applying the pressure force of a spot welding gun |
| CN106312500B (zh) * | 2016-09-20 | 2018-09-07 | 浙江工业大学 | 一种微小尺寸装配推送装置及方法 |
-
2017
- 2017-10-20 DE DE102017009816.6A patent/DE102017009816B4/de active Active
-
2018
- 2018-09-20 WO PCT/EP2018/075456 patent/WO2019076573A1/de not_active Ceased
- 2018-09-20 EP EP18773994.1A patent/EP3697578A1/de not_active Withdrawn
- 2018-09-20 CN CN201880083022.5A patent/CN111511507B/zh active Active
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019076573A1 (de) | 2019-04-25 |
| DE102017009816A1 (de) | 2019-04-25 |
| DE102017009816B4 (de) | 2024-02-29 |
| CN111511507A (zh) | 2020-08-07 |
| CN111511507B (zh) | 2024-05-28 |
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