EP3740339A1 - Widerstandsschweissen mittels roboter - Google Patents
Widerstandsschweissen mittels roboterInfo
- Publication number
- EP3740339A1 EP3740339A1 EP19700928.5A EP19700928A EP3740339A1 EP 3740339 A1 EP3740339 A1 EP 3740339A1 EP 19700928 A EP19700928 A EP 19700928A EP 3740339 A1 EP3740339 A1 EP 3740339A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- welding
- robot
- workpiece
- assembly
- commanded
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/10—Spot welding; Stitch welding
- B23K11/11—Spot welding
- B23K11/115—Spot welding by means of two electrodes placed opposite one another on both sides of the welded parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/30—Features relating to electrodes
- B23K11/31—Electrode holders and actuating devices therefor
- B23K11/314—Spot welding guns, e.g. mounted on robots
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/095—Monitoring or automatic control of welding parameters
- B23K9/0953—Monitoring or automatic control of welding parameters using computing means
Definitions
- the present invention relates to a method of electrically welding a workpiece assembly with a robot assembly, a controller for controlling the robot assembly, a system including the robot assembly and the controller, and a computer program product for performing the method
- a beginning and a period of time for a rotary movement of the pliers are predetermined in advance according to a predetermined welding time. If the welding time is not known in advance, as they are
- the object of the present invention is to improve a robot-assisted welding.
- Claims 7 to 9 provide a controller or a
- the welding is a resistance and / or
- the welding electrode (s) is / are in one embodiment an electrode (s) of a welding gun.
- the or at least one of the welding electrodes may be a movable electrode which is reversibly adjusted in a closing direction or is / are adjustable, in particular to contact the workpiece arrangement ,
- the robot assembly in particular at least one robot of the robot assembly, carries the welding electrode (s). Additionally or alternatively, in one embodiment, the robot assembly, in particular at least one robot of the robot assembly, performs the workpiece assembly.
- Electrode axis an angle, the maximum of 45 °, in one embodiment at most 30 °, in particular at most 15 ° and in one embodiment, at least substantially, 0 °.
- the rotational movement is performed with a predetermined, in particular to an initial acceleration and final braking phase constant, rotational speed.
- the welding result can be improved particularly advantageously, in particular in combination.
- the rotational movement in particular automatically, in dependence on a, in particular during operation or during welding, commanded and / or detected welding end terminated.
- the method comprises the steps of:
- the welding end can
- a sufficiently long (permanently) e rotational movement can advantageously be ensured for a rotationally movement-free predetermined time duration for the rotational movement, preferably a rotational movement-free one
- the rotational movement is started according to an embodiment of the present invention, in particular automatically, in response to a commanded and / or detected welding start.
- the method comprises the steps of: commanding and / or detecting a start of welding, in particular in operation, and starting the rotational movement in dependence on the commanded or detected
- the start of perspiration may be a pending or predicted or current start of perspiration.
- a rotation-motion-free (initial) welding can advantageously be avoided in comparison with a predetermined start for the rotational movement and, additionally or alternatively, an unnecessarily long (continuous) rotational movement can be avoided
- a pending start of welding or a forthcoming end of welding in an embodiment may be based on a corresponding command of a
- the rotational movement is started and / or terminated as a function of a commanded and / or detected welding current, in particular in response to a commanded and / or detected welding current drop or welding current end and / or depending on a commanded and / or detected welding current increase or.
- welding start started.
- the rotational movement is thus started and / or terminated or triggered by a welding current control.
- the method comprises the steps of: commanding and / or detecting a welding current drop, in particular welding current end, in particular during operation or welding, and terminating the rotational movement in dependence on the commanded or detected welding current drop or end; and / or the steps on:
- the welding current drop or increase can, in particular, be an upcoming or predicted or current one
- rotation-free welding avoided, and additionally or alternatively an unnecessarily long (permanently) e rotary motion can be avoided.
- the rotational movement by a predetermined, adjustable in one embodiment, time before the (commanded) or after the
- the beginning and / or the end of the rotational movement can be delayed by a predetermined value.
- the beginning and / or the end of the rotational movement can be brought forward by a predetermined value before starting or ending, for example, by a
- corresponding command is detected in advance or in turn delayed from the beginning or end of the rotation.
- Welding start or welding end is changed according to an embodiment of the present invention, a sense of rotation or a rotational direction during a contact between welding ßelektrode (n) and workpiece assembly, in particular during welding, in response to a predetermined parameter.
- the Rotary motion are in principle carried out indefinitely, in particular until they are in an execution depending on the commanded or
- the welding result can be improved particularly advantageously and / or the rotational movement can in principle be carried out indefinitely, in particular until it ends in one embodiment as a function of the commanded or detected welding end.
- Controlling the robot arrangement in particular hardware and / or software, in particular programmatically, set up for carrying out a method described here according to one of the preceding claims and / or has means for starting and / or terminating a rotation movement carried out by the robot arrangement between the device to be welded
- the controller or your agent has:
- Welding current increase or welding current beginning in particular means for commanding and / or detecting a rise in welding current, in particular welding current start, in particular during operation, and to start the
- Execution adjustable, time before or after the (commanded or recorded) start of welding in particular increase in welding current or welding current beginning, and / or to end the rotational movement by a predetermined, adjustable in one embodiment, time before or after the (commanded or recorded) Welding end, in particular welding current drop or welding current end;
- An agent in the context of the present invention may be hard and / or
- CPU microprocessor unit
- a storage system may have 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 thereby control, in particular, the robot arrangement.
- computer program product may include, in particular, a storage medium for storing a program or, in particular, a nonvolatile storage medium, wherein a
- Running this program a system or a controller, in particular a computer, caused to perform a method described herein or one or more of its steps.
- a system comprises
- the system especially the
- Robot assembly may include the welding electrode (s) in one embodiment.
- Fig. 1 a system with a robot assembly and a controller for controlling the robot assembly
- FIG. 1 shows a system comprising a robot assembly in the form of a robot 10 with a robot-guided welding gun 20 having a movable welding electrode 21 and a fixed welding electrode 22, and a controller 30 for controlling the robot assembly for electrically welding a
- Fig. 2 shows a method for electrically welding the workpiece assembly 41, 42 mithiife the robot assembly according to an embodiment of the present invention.
- a step S10 it is checked whether a start of welding, in particular a start or rise of a welding current, has been commanded. As long as this is not the case (S10: "N"), the query is repeated.
- step S20 If a welding start has been commanded (S10: “Y”), it is checked in step S20 if a predetermined first time has elapsed since this detection, and if not (S20: “N"), the retrieval is repeated , If the predetermined first time has elapsed since the detection in step S10 (S20: "Y"), in a step S25, a rotation of the welding gun 20 about the electrode axis E is started (see Fig. 1). In a step S30 it is checked whether a welding end, in particular an end or drop of the welding current, has been commanded.
- step S40 it is checked in a step S40 whether a predetermined rotation angle of the welding tongs 20 around the electrode axis E has been achieved by the rotational movement ⁇ .
- step S40 If it is determined in step S40 that the predetermined rotational angle of the welding gun 20 has been achieved in terms of amount by the rotational movement ⁇ (S40: "Y"), in step S45, the rotational sense of rotation is changed ( ⁇ ⁇ - ⁇ ). The process also returns to step S30, thus changing the direction of rotation of the rotary motion.
- step S50 If a welding end has been commanded (S30: “Y”), it is checked in step S50 if a predetermined second time has elapsed since this detection, and if not (S50: "N"), the retrieval is repeated If the predetermined second time has elapsed since the detection in step S30 (S50: "Y"), the rotational movement of the welding gun 20 about the electrode axis E is ended in a step S55.
- step S60 a new welding point and the process starts again with step $ 10.
- step S10 in particular in step S10 and / or S30 respectively instead of
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Robotics (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Resistance Welding (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018200883.3A DE102018200883A1 (de) | 2018-01-19 | 2018-01-19 | Roboterschweißen |
| PCT/EP2019/051101 WO2019141756A1 (de) | 2018-01-19 | 2019-01-17 | Widerstandsschweissen mittels roboter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3740339A1 true EP3740339A1 (de) | 2020-11-25 |
Family
ID=65036813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19700928.5A Pending EP3740339A1 (de) | 2018-01-19 | 2019-01-17 | Widerstandsschweissen mittels roboter |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US11633801B2 (de) |
| EP (1) | EP3740339A1 (de) |
| CN (1) | CN111629853A (de) |
| DE (1) | DE102018200883A1 (de) |
| WO (1) | WO2019141756A1 (de) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007044748A (ja) * | 2005-08-11 | 2007-02-22 | Yaskawa Electric Corp | ロボットの制御方法および制御装置 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3136865B2 (ja) | 1993-10-27 | 2001-02-19 | トヨタ自動車株式会社 | スポット溶接の溶着解除方法およびスポット溶接装置 |
| DE69406614T2 (de) | 1993-08-25 | 1998-06-25 | Toyota Motor Co Ltd | Steuerverfahren zum Punktschweissen, und Vorrichtung die eine gesteuerte Schweisszange benützt |
| DE102005001341B3 (de) | 2005-01-11 | 2006-10-05 | Kuka Schweissanlagen Gmbh | Verfahren und Vorrichtung zum elektrischen Punktschweißen |
| US9144860B2 (en) | 2012-03-29 | 2015-09-29 | Fanuc Robotics America Corporation | Robotic weld gun orientation normalization |
| JP5609938B2 (ja) | 2012-09-06 | 2014-10-22 | 株式会社安川電機 | シーム溶接ロボット |
| EP2937167B1 (de) * | 2012-12-18 | 2021-04-14 | Kabushiki Kaisha Yaskawa Denki | Nahtschweissvorrichtung, nahtschweissverfahren, robotersteuerungsvorrichtung und robotersteuerungsverfahren |
-
2018
- 2018-01-19 DE DE102018200883.3A patent/DE102018200883A1/de active Pending
-
2019
- 2019-01-17 CN CN201980009010.2A patent/CN111629853A/zh active Pending
- 2019-01-17 US US16/962,888 patent/US11633801B2/en active Active
- 2019-01-17 WO PCT/EP2019/051101 patent/WO2019141756A1/de not_active Ceased
- 2019-01-17 EP EP19700928.5A patent/EP3740339A1/de active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007044748A (ja) * | 2005-08-11 | 2007-02-22 | Yaskawa Electric Corp | ロボットの制御方法および制御装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102018200883A1 (de) | 2019-07-25 |
| US11633801B2 (en) | 2023-04-25 |
| CN111629853A (zh) | 2020-09-04 |
| WO2019141756A1 (de) | 2019-07-25 |
| US20210362265A1 (en) | 2021-11-25 |
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