EP3419797A1 - Endeffektor-schutzsystem - Google Patents
Endeffektor-schutzsystemInfo
- Publication number
- EP3419797A1 EP3419797A1 EP17707300.4A EP17707300A EP3419797A1 EP 3419797 A1 EP3419797 A1 EP 3419797A1 EP 17707300 A EP17707300 A EP 17707300A EP 3419797 A1 EP3419797 A1 EP 3419797A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- end effector
- protection system
- manipulator
- enveloping structure
- protective
- 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- Withdrawn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
- 239000012636 effector Substances 0.000 title claims abstract description 155
- 230000001681 protective effect Effects 0.000 claims description 67
- 238000013016 damping Methods 0.000 claims description 39
- 230000001419 dependent effect Effects 0.000 claims description 16
- 239000006096 absorbing agent Substances 0.000 claims description 6
- 230000035939 shock Effects 0.000 claims description 6
- 230000006378 damage Effects 0.000 abstract description 8
- 208000027418 Wounds and injury Diseases 0.000 abstract description 6
- 208000014674 injury Diseases 0.000 abstract description 6
- 239000000463 material Substances 0.000 description 6
- 238000003754 machining Methods 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 241000282412 Homo Species 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000000806 elastomer Substances 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 208000034656 Contusions Diseases 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000005068 cooling lubricant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012729 immediate-release (IR) formulation Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J19/00—Accessories fitted to manipulators, e.g. for monitoring, for viewing; Safety devices combined with or specially adapted for use in connection with manipulators
- B25J19/06—Safety devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J19/00—Accessories fitted to manipulators, e.g. for monitoring, for viewing; Safety devices combined with or specially adapted for use in connection with manipulators
- B25J19/0075—Means for protecting the manipulator from its environment or vice versa
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J19/00—Accessories fitted to manipulators, e.g. for monitoring, for viewing; Safety devices combined with or specially adapted for use in connection with manipulators
- B25J19/0091—Shock absorbers
Definitions
- the present invention relates to an end effector protection system for wrapping an end effector of a manipulator, which end effector protection system is particularly suitable for use in human-robot collaboration.
- MRK human-robot collaboration
- the MRK advantageously combines both strengths.
- MRK systems are u. a. to call manually guided manipulators and assistant robots.
- the former include manipulators that are hand-controlled (for example, directly or via telemanipulation)
- loads can be offset.
- Assist robots are manipulators with which an operator interacts without a guards.
- the manipulators may carry dangerous end-effectors, such as tools that are partially sharp-edged or pointed, or rotate at high speeds. This is for example
- sensors can be used, for example, to locate a human in the vicinity of a manipulator.
- ultrasonic sensors can be used.
- too Capacitive distance sensors can be used to detect the presence of a human. If a person has been detected in the immediate vicinity of the manipulator, it can be responded differently. For example, the operating speed of the manipulator can be reduced in order to give the human the opportunity to react to the movements of the manipulator.
- mechanical protective structures which shield the end effector.
- These mechanical protective structures are typically spring-loaded or un-stored casings and can be displaced by applying a sufficiently high counterforce and release the end effector. This counterforce can also be applied, for example, to an unwanted collision of the manipulator or manually by a human, so that only a conditional protection is provided.
- Manipulators such as articulated robots, can be secured to reduce the risk of accidents and injury in, for example, MRK systems. Further, it is an object of the present invention to provide manipulator systems for safe use in MRI systems.
- an end effector protection system for at least partially enveloping an end effector of a manipulator, which end effector protection system has at least one envelope structure, which is adapted to at least partially envelop the end effector of the manipulator.
- the enveloping structure is movably arranged in order to be able to set the degree of the envelope of the end effector, and the end effector protection system also has at least one speed-dependent one
- Damping element which is associated with the enveloping structure, and is adapted to counteract a movement of the enveloping structure as a function of speed.
- end effector here includes all tools, objects or devices that can be used by a robot or manipulator for machining a workpiece. Enveloping an end effector generally reduces the accessibility or accessibility of the end effector from the outside.
- the end-effector protection system has an enveloping structure which is set up to at least partially encase the end effector, in order to reduce the risk of
- Tool thrusting direction across a distal end of the end effector provides effective mechanical protection for the end effector.
- the enveloping structure provides protection of the end effector, since the latter is at least partially enveloped by the enveloping structure.
- Damping properties can also allow a minimum movement. It is advantageous that the damping element a quick exposure of the end effector can prevent and ensure that the end effector, for example, is exposed only in a slow or controlled movement of the enveloping structure.
- the manipulator is not or hardly braked and the clock frequency of the manipulator, respectively the end effector, is not degraded.
- any damping elements can be used, which can generate a speed-dependent counterforce, which counteracts a movement of the enveloping structure against the tool pushing direction.
- the movement of the enveloping structure can be done in different ways.
- the enveloping structure can be displaceably mounted and so on
- the enveloping structure can also be configured to be movable, and only a part of the enveloping structure can be moved.
- the enveloping structure can be made compressible or deformable in order to be able to set the degree of the envelope of the end effector.
- the enveloping structure may be substantially parallel to
- Tool thrust direction A of the end effector to be movably arranged. If the enveloping structure is substantially parallel to the tool impact direction A of
- the sheath structure may be axially displaced relative to the end effector to adjust the degree of sheath.
- Tool thrust direction A is typically the positive Z direction of the End effector coordinate system.
- a screwing tool is the
- Tool impact direction for example, the axial direction of the rotating spindle, which points away from the tool tip.
- the enveloping structure can have at least two protective elements, which are distributed uniformly around the end effector, wherein the protective elements are preferably arranged to be movable independently of one another.
- the enveloping structure may have two protective elements facing each other, i. circumferentially distributed evenly. If the enveloping structure has, for example, three protective elements, then these can be circumferentially spaced apart by 120 °. An evenly uniform distribution allows even protection of the end effector from all sides. If the protective elements are arranged to be movable independently of one another, then the end effector can also be protected, for example if it is used on workpieces with uneven surfaces. For example, if a screw is screwed on a convex surface, some protective elements may protrude further in the tool pushing direction than other protective elements, since these are arranged to be movable independently of one another and thus follow the surface of the workpiece. This results in an envelope of the end effector, even when used, and for effective protection.
- the protective elements can be arranged in at least two rows around the end effector, wherein the protective elements of a first row are preferably arranged circumferentially offset from the protective elements of a second row. Further preferably, the protective elements of the first and second rows partially overlap to a circumferentially complete
- Protective elements allow to provide a complete enclosure of the end effector, which prevents the radial accessibility or accessibility of the end effector from the outside. At the same time, however, the end effector in the respective use is not hermetic by the workpiece to be machined and the
- Sheath structure included. Enables the end effector to actively and / or passively cool during use and to divert cooling medium such as air or other known cooling media through the rows of protective elements.
- a cooling lubricant for example, in the case of machining a workpiece be derived by means of the end effector a cooling lubricant.
- an occupant may be protected from heat, UV light and / or spatter while allowing sufficient convection to protect the workpiece from overheating.
- the at least two protective elements of the enveloping structure may comprise a rigid main body.
- a rigid skin body may be made of metal or a plastic, for example.
- Rigid main bodies provide a stable hull structure, reliably blocking the accessibility of the end effector. For example, it is possible to prevent the enveloping structure from being pierced by a tool and / or a workpiece guided by a person or another manipulator. Thus, the security can be further increased.
- each speed-dependent damping element is preferably coupled to at least one protective element of the enveloping structure. If each of the protective elements assigned a separate damping element, the independent mobility can also be speed-dependent as described above. Likewise, for example, two protective elements one
- Damping element assigned to allow a simple and simple construction of the end effector protection system.
- the enveloping structure may further include a protective sheath to completely radially enclose the end effector along the tooling direction A.
- a protective cover which completely radially surrounds the end effector along the tool impact direction, provides the highest possible protection.
- the protective cover is open in the direction of the tool to open the insert
- the protective cover can be made at least partially of a rigid and / or flexible material.
- the protective cover may comprise a support structure covered with a flexible material, such as a fabric.
- the protective cover can be made entirely of a rigid material, such as a plastic or a metal, or be made entirely of a flexible material, such as an elastomer or a textile fabric and a fleece.
- a flexible protective cover can be stretched over the protective elements of the enveloping structure.
- the enveloping structure and / or the at least two protective elements of the enveloping structure may have an elastic extension at its distal end.
- rigid protective elements and / or enveloping structures are used, there is a risk of injuring or damaging a person or a workpiece as a result of the contact with the distal end of the protective elements and / or the enveloping structure.
- a flexible end allows a gentle touchdown on one
- the elastic extension may be irregular
- the flexible extension is made of a silicone, an elastomer or a thermoplastic elastomer.
- the flexible extension can be formed integrally with the protective element and / or the enveloping structure. For example, this can be done by
- the flexible extension can also be a separate extension which is attached to the protective element and / or the enveloping structure by conventional means.
- the enveloping structure may, in particular, have an expandable volume body and the volume of the volume body may be increased by filling with a medium, in particular with air, in order to be able to set the degree of the envelope of the end effector.
- the expandable volume body is preferably designed as an inflatable body.
- the enveloping structure corresponds to the solid or is identical to it.
- the solid can be expanded by filling it with a medium, ie the enveloping structure or the solid is movably arranged.
- the medium in different phases may be present.
- the medium may be air, or even a fluid.
- Air is generally preferred as the medium, since it is often available anyway in production processes or workshops in the form of compressed air and is also non-toxic, inexpensive and easily accessible.
- the enveloping structure of the securing system can be set up such that the greater the volume of the volume body, the larger the degree of encasing the tool. Consequently, by filling the volume body with the medium, the envelope of the end effector is enlarged by the envelope structure, so that the accessibility of the end effector is reduced.
- the bulk body advantageously encloses the end effector and / or an end effector area, even when the manipulator is at rest, thus protecting against possible injury or damage by the end effector. By emptying the volume body, it preferably collapses and releases the end effector in order to be able to use it.
- the damping element may comprise a valve to drain the medium can. Does the damping element comprises a valve, or is the damping element formed as a valve, the damping element of a movement of the volume body, respectively the envelope structure
- the envelope structure envelops the
- End effector for example, in such a way that the enveloping structure protrudes beyond a distal end of the end effector in the tool thrust direction, and comes the envelope structure with an object in contact, decides the collision speed (or the speed of movement of the manipulator), if and / or how far the envelope structure due to the contact is moved against the tool pushing direction.
- the medium can slowly escape from the volume body and the enveloping structure is moved counter to the tool pushing direction in order to reduce the degree of the envelope of the end effector.
- the collision speed is above a certain limit speed, the medium can not escape quickly enough from the volume body and the enveloping structure is not or hardly moved counter to the direction of the tool impact.
- the attachment ring can, for example, two
- Endeffector protection system to attach to the manipulator.
- Attachment is preferably by a clamp connection or a
- the manipulator may have corresponding devices to the fixing ring on the manipulator directly by means of
- end-effector protection system such as screws to attach.
- Other fastening systems are also possible.
- the end-effector protection system is releasably attached to the manipulator, it can be easily adapted or retrofitted to different end-effectors, for example.
- the damping element may be a hydraulic or pneumatic shock absorber. Hydraulic or pneumatic shock absorbers are
- pneumatic and / or hydraulic systems are often available to manipulators or in the manufacturing environment, so that the
- Damping elements can be easily coupled with these systems, if necessary.
- the hydraulic and / or pneumatic shock absorbers can be self-sufficient shock absorbers that do not need to be connected to a pneumatic and / or hydraulic system.
- the end-effector protection system may further comprise a spring element which urges the envelope structure with a certain force into a position corresponding to a maximum degree of the envelope of the end-effector.
- a spring element urging the enveloping structure with a certain force into the position in which a maximum degree of the envelope of the
- the end effector protection system may further comprise at least two spring elements, wherein each spring element preferably has at least one
- Protective element of the enveloping structure is coupled. If a separate spring element is assigned to each of the protective elements, then the mutually independent mobility, in particular the pushing back of the protective elements, can take place separately in order to provide the best possible covering, for example when the end effector is withdrawn from an uneven surface.
- the protective elements may be in contact with a workpiece surface until the specific protective element has reached the maximum degree of cladding.
- two protective elements may be assigned to a spring element in order to allow a simple and simple construction of the end-effector protection system.
- the spring element may be a pneumatic spring, wherein the damping element is preferably formed integrally with the pneumatic spring.
- the pneumatic spring may for example be a gas spring, preferably.
- Pneumatic springs are characterized by a spring travel almost independent force and a small footprint. In addition, they enable the integration of a damping element. So very compact systems can be provided.
- the spring element may be a metallic spring, an air spring and / or a plastic spring. Combinations of different spring elements are also possible.
- a manipulator system comprising a manipulator, an end effector which is attached to the manipulator and preferably comprises a tool with a rotating spindle, and a
- End effector protection system which at least partially envelops the end effector of the manipulator. Due to the end effector protection system, the manipulator system can be used in particular in MRC environments, so that manipulation between the manipulator and the human being is possible without posing a high risk to humans. Furthermore, this allows
- Figure l is a schematic representation of a manipulator system
- Figure 2 is a schematic representation of an end effector protection system
- Figure 3A is a schematic representation of another end effector protection system
- Figure 3B shows a protective cover for use in an end effector protection system
- Figure 4 is a schematic diagram for explaining the operation of the end effector protection system.
- FIG. 1 shows a manipulator system 1, which comprises a manipulator 10, which is controlled by a control device 20.
- the manipulator comprises an end effector 12, which is for example a screwing tool.
- An end-effector protection system 300 is attached to the manipulator 10.
- the end-effector protection system 300 comprises an enveloping structure, which will be explained in more detail with reference to FIGS. 2, 3A and 3B.
- the enveloping structure encloses the end effector 12 at least partially.
- the end effector 12 is protected from the environment and the manipulator 10 can be used in MRK systems, so that a person 50 in the immediate vicinity of the manipulator 10 without further protection devices, such as protective fences, with the
- Manipulator 10 can work together.
- End effector 12 may be configured to manipulate workpieces 32, such as by bolting.
- the workpieces 32 can on a
- Workpiece supply device 30 such as a conveyor belt, be provided.
- FIG. 2 shows a similar end effector protection system 200 which is connected to the
- Manipulator 10 may be attached.
- the end effector protection system 200 is attached to the manipulator 10 by means of a mounting ring 210.
- the manipulator 10 includes an end effector 12, which
- the end effector 12 includes a free rotating spindle 14 which has a distal end 16 in the tool thrust direction A.
- An envelope structure 230 protrudes beyond the distal end 16 of the end effector 12 in the direction of tool impact A by an amount z.
- the sheath structure 230 is formed as a cylindrical sheath to radially protect the end effector.
- the envelope structure 230 is movably configured to adjust the degree of wrapping of the end effector.
- the enveloping structure 230 is designed to be axially displaceable.
- the enveloping structure 230 is guided in the damping element 220.
- the damping element 220 may be, for example, a pneumatic or hydraulic shock absorber.
- a fluid or gas such as compressed air located in the damping element 220, is discharged outwardly through the opening 225 into a reservoir (not shown) ). Due to the properties of the fluid and / or the gas, the degree of movement of the envelope structure 230 is dependent on the collision velocity.
- the force which counteracts the movement of the enveloping structure 230 counter to the tool impact direction A depends on the collision speed.
- the enveloping structure 230 is coupled to the damping element 220 via a sealing ring 235.
- the sealing ring 235 is used in
- Damping element 220 as a piston.
- the end effector protection system 200 includes a spring element 240 urging the enveloping structure 230 in the direction of the tool thrust direction A with a certain force, the spring force.
- Fig. 3A shows another end effector protection system 300 which is connected to a
- Manipulator 10 can be attached. End effector protection system 300 is attached to manipulator 10 by means of a split attachment ring 310.
- the manipulator 10 includes an end effector 12, for example, a
- the end effector protection system 300 includes two
- Protective elements 332, 334 which envelop the end effector 12 of the manipulator 10 at least partially and circumferentially evenly distributed around the End effector 12 are arranged.
- the protective elements 332, 334 are each coupled to speed-dependent damping elements 323, 324.
- the end effector protection system 300 may include a protective sheath 350, which is preferably coupleable to the protective elements 332, 334.
- the protective cover 350 includes 336 shots, which with the
- the receptacles 336 may, as shown, be mounted on the outside of the protective cover. Likewise, the recordings can be mounted inside the protective cover. Furthermore, the receptacles may be formed integrally with the protective cover, for example as a bore in a wall of the protective cover.
- the protective cover may be made of a rigid material and / or of a flexible material.
- Fig. 4 the schematic operation of an end effector protection system 200, 300 is shown in a flow chart.
- a first step 410 the manipulator is moved at a travel speed until it collides with an object and / or people in a step 420.
- this step 420 it is determined by means of a control device 20 whether the collision has occurred in space or at a predetermined processing position.
- step 421 When a collision is detected at a predetermined machining position, (step 421), and the collision velocity is less than one
- the envelope structure may be moved in step 425 counter to the tool stroke direction A, so that the degree of wrapper is reduced and the end effector is partially exposed. Subsequently, the end effector can be used in step 427, so that, for example, a screw connection is possible.
- the manipulator is moved further and the envelope structure returns to its original position so that in step 432 the end effector is protected and the manipulator can be moved at full speed.
- step 422 If, however, a collision is detected in space (step 422), and is the
- step 424 Traversing speed / the collision speed of the manipulator greater than the limit speed of the speed-dependent damping element (step 424), the damping element brakes the collision in step 426th
- step 428 by means of the control device 20 of the Manipulator system 1 a collision are detected and in step 430 a suitable continuation of the manipulator are allowed. In step 432, the normal operation of the manipulator may be resumed.
- the end effector can be used depending on the collision speed or be protected.
- effective protection of people in the vicinity can be provided.
Landscapes
- Engineering & Computer Science (AREA)
- Robotics (AREA)
- Mechanical Engineering (AREA)
- Manipulator (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE202016001261.5U DE202016001261U1 (de) | 2016-02-26 | 2016-02-26 | Endeffektor-Schutzsystem |
PCT/EP2017/054368 WO2017144682A1 (de) | 2016-02-26 | 2017-02-24 | Endeffektor-schutzsystem |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3419797A1 true EP3419797A1 (de) | 2019-01-02 |
Family
ID=58162603
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17707300.4A Withdrawn EP3419797A1 (de) | 2016-02-26 | 2017-02-24 | Endeffektor-schutzsystem |
Country Status (4)
Country | Link |
---|---|
US (1) | US20200078964A1 (de) |
EP (1) | EP3419797A1 (de) |
DE (1) | DE202016001261U1 (de) |
WO (1) | WO2017144682A1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102018129555A1 (de) | 2018-06-14 | 2019-12-19 | HELLA GmbH & Co. KGaA | Vorrichtung zur automatisierten Herstellung von Schraubverbindungen |
JP7350297B2 (ja) * | 2019-08-30 | 2023-09-26 | Johnan株式会社 | 制御装置、制御方法およびプログラム |
EP4422825A1 (de) * | 2021-10-26 | 2024-09-04 | Hella Gmbh & Co. Kgaa | Vorrichtung zur automatisierten herstellung von schraubverbindungen |
CN114625029B (zh) * | 2022-03-07 | 2024-05-24 | 容德精机(江苏)机床有限公司 | 一种宏微级联式磁悬浮运动执行器 |
DE102022204453A1 (de) | 2022-05-05 | 2023-11-09 | Dr. Doll Engineering Gmbh | Schutzvorrichtung für einen Endeffektor eines Roboterarms eines Industrieroboters und Industrieroboter |
CN116277160B (zh) * | 2023-05-18 | 2023-08-29 | 深圳市大族机器人有限公司 | 一种防爆型多轴机器人 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006044071A1 (de) * | 2006-09-20 | 2008-04-03 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Roboter sowie Roboter-Schutzeinrichtung |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4432067B2 (ja) * | 2001-02-27 | 2010-03-17 | 教之 手嶋 | 衝突回避装置、及びロボット |
DE102007062245A1 (de) * | 2007-12-21 | 2009-06-25 | Robert Bosch Gmbh | Kollisionsdetektionsvorrichtung sowie Handhabungsgerät |
DE102012217764A1 (de) * | 2012-09-28 | 2014-06-12 | Bayerische Motoren Werke Aktiengesellschaft | Werkzeugschutzvorrichtung |
DE202013105501U1 (de) * | 2013-12-03 | 2015-03-03 | Daimler Ag | Arbeitsvorrichtung |
-
2016
- 2016-02-26 DE DE202016001261.5U patent/DE202016001261U1/de not_active Expired - Lifetime
-
2017
- 2017-02-24 US US16/079,761 patent/US20200078964A1/en not_active Abandoned
- 2017-02-24 EP EP17707300.4A patent/EP3419797A1/de not_active Withdrawn
- 2017-02-24 WO PCT/EP2017/054368 patent/WO2017144682A1/de active Application Filing
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006044071A1 (de) * | 2006-09-20 | 2008-04-03 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Roboter sowie Roboter-Schutzeinrichtung |
Also Published As
Publication number | Publication date |
---|---|
WO2017144682A1 (de) | 2017-08-31 |
US20200078964A1 (en) | 2020-03-12 |
DE202016001261U1 (de) | 2017-05-29 |
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