WO2013027283A1 - Nc工作機械システム - Google Patents
Nc工作機械システム Download PDFInfo
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- WO2013027283A1 WO2013027283A1 PCT/JP2011/069077 JP2011069077W WO2013027283A1 WO 2013027283 A1 WO2013027283 A1 WO 2013027283A1 JP 2011069077 W JP2011069077 W JP 2011069077W WO 2013027283 A1 WO2013027283 A1 WO 2013027283A1
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- axis
- robot
- articulated robot
- machine tool
- cpu
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Classifications
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- 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—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
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- 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—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/4093—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by part programming, e.g. entry of geometrical information as taken from a technical drawing, combining this with machining and material information to obtain control information, named part programme, for the NC machine
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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—Programme-controlled manipulators
- B25J9/16—Programme controls
- B25J9/1656—Programme controls characterised by programming, planning systems for manipulators
- B25J9/1664—Programme controls characterised by programming, planning systems for manipulators characterised by motion, path, trajectory planning
- B25J9/1666—Avoiding collision or forbidden zones
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
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- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/406—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by monitoring or safety
- G05B19/4067—Restoring data or position after power failure or other interruption
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- G—PHYSICS
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- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
- G05B19/41815—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by the cooperation between machine tools, manipulators and conveyor or other workpiece supply system, workcell
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- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Definitions
- the present invention relates to an NC machine tool system.
- articulated robots are composed of a plurality of rotation axes. Therefore, it is extremely difficult for the operator to manually operate the articulated robot using the teaching box. Even if the operator is familiar with the operation, if there are interference objects around the multi-joint robot, there is a risk that the multi-joint robot may interfere with the interference object if the axis is selected or the direction of movement is wrong. For this reason, the worker moves the articulated robot little by little while carefully considering the selection of the optimal axis and the moving direction. As described above, the operation of the articulated robot is very difficult to handle because it is a very nerve-intensive operation. In Japan, in particular, in order to operate an articulated robot, it is necessary to obtain a qualification by taking a class prescribed by law.
- Patent Document 1 discloses an industrial robot that is provided with a switch corresponding to each of a plurality of operation programs, and that performs work according to a program read according to a pressed switch.
- Patent Document 2 discloses that the robot is activated in a continuous operation mode when the activation switch of the teaching pendant is operated for a long time, and the robot is activated in a single block operation when operated for a short time.
- an NC machine tool is systemized using an articulated robot, no consideration is given to an operator who is not handled as a robot.
- An object of the present invention is to provide an NC machine tool system that can be safely operated even by an operator who operates the articulated robot for the first time in an NC machine tool system including an articulated robot and an NC machine tool. It is in.
- an NC machine tool an operation panel for the NC machine tool, an articulated robot arranged above the NC machine tool, and an articulated robot.
- an NC machine tool system including program storage means for storing a program for operating, and a robot control device for controlling an articulated robot according to the program.
- the operation panel is provided with switch means for operating the articulated robot by executing the program stored in the program storage means.
- the program sets the target position / posture of the articulated robot and selects the movement path according to the position / posture of the articulated robot when the switch means is turned on, and the target position / posture along the selected movement path. It is programmed to move the articulated robot to take.
- the robot control device controls the articulated robot according to a program.
- the program when the operator operates the switch means of the operation panel, the program is executed and the articulated robot operates. Thereby, even an operator who operates the articulated robot for the first time can operate it safely. Further, the movement path is selected according to the position and orientation of the articulated robot when the switch means is turned on, and the articulated robot moves along the selected movement path so as to take the target position and orientation. This eliminates the need for the operator to operate the articulated robot in accordance with the position and orientation of the articulated robot.
- a workpiece pallet is arranged on the side of the NC machine tool, and the articulated robot can move between the NC machine tool and the pallet.
- the program sets the target position and orientation of the articulated robot and selects the movement path according to the position and orientation of the articulated robot when the switch means is turned on. It is preferably programmed to move the articulated robot so as to take the target position and posture while avoiding interference with the safety fence along the route, and the robot controller preferably controls the articulated robot according to the program.
- the movement path is selected according to the position and orientation of the articulated robot when the switch means is turned on, and the target position and orientation are avoided while avoiding interference with the safety fence.
- the articulated robot moves to take This eliminates the need for the operator to operate the articulated robot while avoiding interference with the safety fence according to the position and orientation of the articulated robot.
- the operation panel includes a first operation panel disposed near the NC machine tool and a second operation panel disposed near the pallet, each of the first and second operation panels.
- a switch means operated to execute the program is provided.
- the program when an articulated robot is located near the NC machine tool, the program can be executed by operating the switch means of the first operation panel near the NC machine tool.
- the program when the articulated robot is positioned near the pallet, the program can be executed by operating the switch means on the second operation panel near the pallet.
- the program is preferably programmed under an orthogonal coordinate system used in the NC machine tool.
- the program can be executed under the orthogonal coordinate system used in the NC machine tool. For this reason, it is easy for an operator accustomed to the operation of the NC machine tool to understand the operation of the articulated robot.
- FIG. 1 is a front view of an NC machine tool system according to an embodiment of the present invention.
- the front view of NC machine tool system which omitted the front fence.
- the side view of an articulated robot when moving in a machine tool The side view of an articulated robot when moving above a pallet.
- the flowchart of the program started with the one-touch button.
- the flowchart of the program started with the one-touch button.
- Flowchart of pattern 5 Explanatory drawing showing the relationship between each process of Pattern 5 to Pattern 16, the vicinity of the front fence, the front fence separation, the vicinity of the machine, the vicinity of the traveling end, and the separation of the apparatus and the traveling end.
- the perspective view of a robot hand The perspective view of a robot hand.
- the side view of the articulated robot which takes a stand-by posture in a stand-by position is a schematic diagram showing the position of the robot hand where each process of pattern 5 to pattern 16 is performed, and (b) is a schematic diagram showing the position of the robot hand where each process of pattern 5 to pattern 16 is performed.
- the NC machine tool system includes an NC machine tool 10, an NC control device 20 that controls the NC machine tool 10, an articulated robot 40, and a robot control device 50 that controls the articulated robot 40. It has.
- the articulated robot 40 travels on the gantry rail 30 disposed above the NC machine tool 10.
- the NC machine tool 10 is an opposed spindle type compound lathe.
- a pallet 60 for supplying and discharging workpieces is arranged on the side of the NC machine tool 10.
- the gantry rail 30 extends so as to straddle between the upper surface of the NC machine tool 10 and the upper surface of the pallet 60.
- the vertical direction, the front-rear direction, and the left-right direction when the NC machine tool 10 shown in FIGS. 1 and 2 is viewed from the front are defined as the Z-axis direction, the X-axis direction, and the Y-axis direction, respectively.
- the + X-axis direction is the front direction
- the + Y-axis direction is the right direction
- the + Z-axis direction is the upward direction.
- the NC machine tool 10 includes a tool spindle unit 10h.
- the tool spindle unit 10h is supported by a column and a saddle.
- the column is movable in the X-axis direction with respect to the base portion.
- the base part is movable in the Y-axis direction.
- the saddle is movable in the Z-axis direction with respect to the column.
- the column is moved in the X-axis direction by the X-axis motor 320 shown in FIG.
- the column is also moved in the Y-axis direction by the base portion driven by the Y-axis motor 330.
- the saddle is also driven in the Z-axis direction by being driven by the Z-axis motor 340 shown in FIG.
- a processing tool 10j is mounted on the tool spindle unit 10h.
- the articulated robot 40 has 6 axes (J1 axis to J6 axis).
- the articulated robot 40 includes a robot base 41 that moves along the J1 axis that coincides with the horizontal direction.
- the robot base 41 is attached to the gantry rail 30 so as to be movable along the longitudinal direction of the gantry rail 30.
- the robot base 41 is provided with a rack and pinion type rail drive unit.
- the rail drive unit includes a J1-axis motor M1 shown in FIG. Since the pinion provided on the output shaft of the J1 axis motor M1 meshes with the rack of the gantry rail 30, when the J1 axis motor M1 is driven, the robot base 41 and the right traveling end RE of the gantry rail 30 shown in FIG. Move between the left travel ends LE.
- the J1 axis is a travel axis.
- a J2 axis arm 42 that swings around a J2 axis parallel to the J1 axis is connected.
- the J2 axis arm 42 is swung by a J2 axis motor M2 with a speed reduction mechanism provided on the robot base 41.
- Connected to the tip of the J2 axis arm 42 is a J3 axis casing 43 that swings around the J3 axis parallel to the J2 axis.
- the J3 axis casing 43 is swung by a J3 axis motor M3 with a speed reduction mechanism built in the J3 axis casing 43.
- a J3 axis arm 44 that rotates around the J4 axis orthogonal to the J3 axis is connected to the tip of the J3 axis casing 43.
- the J3 axis arm 44 is rotated by a J4 axis motor M4 with a speed reduction mechanism provided in the J3 axis casing 43.
- a J6 axis unit 45 that swings around a J5 axis orthogonal to the J4 axis is connected to the tip of the J3 axis arm 44.
- the J6 axis unit 45 is swung by a J5 axis motor M5 shown in FIG. 6 with a speed reduction mechanism built in the J3 axis arm 44. As shown in FIGS.
- the tip of the J6 axis unit 45 rotates around the J6 axis orthogonal to the J5 axis.
- the tip of the J6 axis unit 45 is rotated by a J6 axis motor M6 with a speed reduction mechanism built in the J6 axis unit 45.
- a robot hand 46 is connected to the tip of the J6 axis unit 45.
- the robot hand 46 is fixed to the J6 axis unit 45 via the base 46a.
- a loading hand 46b is fixed to one of a pair of opposed end surfaces of the base 46a, and an unloading hand 46c is fixed to the other.
- Each of the loading hand 46b and the unloading hand 46c is provided with a plurality of jaws 46d. The jaw 46d is operated, and the workpiece 80 is gripped or the workpiece 80 is released. Both the J2 axis and the J6 axis are turning axes.
- the rotation angle around the J2 axis when the J2 axis arm 42 is oriented in the + X direction in a horizontal state is set to 0 degree.
- the rotation angle when the J2 axis arm 42 rotates upward from 0 degree is defined as +, and the rotation angle when the J2 axis arm 42 rotates in the downward direction is defined as ⁇ .
- the rotation angle when the J3 axis arm 44 is directed vertically downward ( ⁇ Z direction) is set to +180 degrees. That is, the rotation angle when the J3 axis arm 44 is directed vertically upward (+ Z direction) is 0 degree.
- the rotation angle around the J3 axis when the J3 axis arm 44 rotates forward from 0 degrees is defined as +, and the rotation angle around the J3 axis when rotated in the rear direction is defined as ⁇ .
- the rotation angle around the J4 axis when the reference portion 44a of the J3 axis arm 44 faces in the + X direction is set to 0 degree.
- the rotation angle around the J4 axis when the reference portion 44a of the J3 axis arm 44 is oriented in the + Y direction from the 0 degree position is +, and the rotation angle around the J4 axis when rotating in the -Y direction is-.
- the rotation angle around the J5 axis when the J6 axis unit 45 is aligned with the J3 axis arm 44 is 0 degree.
- the rotation angle around the J5 axis when the J6 axis unit 45 rotates from 0 degree in one direction (forward direction in FIG. 5) is ⁇ , and the rotation angle around the J5 axis when rotating in the opposite direction (backward direction in FIG. 5) The rotation angle is +.
- the rotation angle around the J6 axis is 0 degree. . That is, this state corresponds to a state in which the loading hand 46b and the unloading hand 46c are in a horizontal state and aligned along the Y axis.
- the rotation angle around the J6 axis when the reference portion 46e of the robot hand 46 is oriented in the + Y direction from 0 degrees is defined as +, and the rotation angle around the J6 axis when rotated in the -Y direction is defined as-.
- the robot hand 46 grips and supplies the workpiece 80 on the pallet 60 to the NC machine tool 10, and discharges the workpiece 80 that has been processed by the NC machine tool 10 onto the pallet 60.
- a front fence 70, a side fence 72, and a rear fence 74 as safety fences are disposed around the NC machine tool 10 and the pallet 60.
- Doors 76 and 78 corresponding to the NC machine tool 10 and the pallet 60 are provided on the front fence 70 so as to be freely opened and closed.
- the doors 76 and 78 are provided with windows 76a and 78a.
- the first operation panel 22 is provided near the window 76 a of the NC machine tool 10.
- the second operation panel 24 is provided.
- the first operation panel 22 and the second operation panel 24 correspond to an operation panel for an NC machine tool.
- a teaching box 26 is provided in the vicinity of the window 78a.
- the teaching box 26 is electrically connected to the robot controller 50 shown in FIG.
- the CPU (central processing unit) 110 of the NC control device 20 controls the NC control device 20 as a whole.
- ROM 110, RAM 140, memory 150, interface 160, communication interface 170, X-axis control unit 210, Y-axis control unit 220, Z-axis control unit 230, spindle control unit 240, etc. are connected to CPU 110 via bus line 120.
- the ROM 130 stores various system programs for controlling the entire NC controller 20.
- the RAM 140 stores temporary calculation data and display data and various data input by the operator via the first operation panel 22 and the second operation panel 24.
- the first operation panel 22 and the second operation panel 24 are connected to the interface 160.
- the first operation panel 22 and the second operation panel 24 include display devices 22a and 24a and keyboards 22b and 24b for data input. As shown in FIGS. 1 and 6, the keyboards 22b and 24b are operated when the articulated robot 40 is raised and the switch keys 22c and 24c operated when the articulated robot 40 is returned to the standby position. Buttons 22d and 24d are provided.
- the switch keys 22c and 24c and the buttons 22d and 24d are switch means.
- the X-axis control unit 210 receives the X-axis position control command from the CPU 110 and outputs the position control command to the servo amplifier 280.
- the servo amplifier 280 drives the X-axis motor 320 based on the position control command and moves the column in the X-axis direction.
- the Y-axis control unit 220 receives the Y-axis position control command from the CPU 110 and outputs the position control command to the servo amplifier 290.
- the servo amplifier 290 drives the Y-axis motor 330 based on the position control command and moves the column in the Y-axis direction.
- the Z-axis control unit 230 receives the Z-axis position control command from the CPU 110 and outputs the position control command to the servo amplifier 300.
- the servo amplifier 300 drives the Z-axis motor 340 based on the position control command, and moves the saddle in the Z-axis direction.
- the spindle control unit 240 receives a spindle rotation control command from the CPU 110 and outputs a spindle speed signal to the spindle amplifier 310.
- the spindle amplifier 310 rotates the spindle motor 350 at the commanded spindle speed based on the spindle speed signal, and drives the machining tool 10j.
- the communication interface 170 can communicate with the robot controller 50 via the communication line L.
- the X-axis motor 320, the Y-axis motor 330, the Z-axis motor 340, and the main shaft motor 350 are servo motors.
- the CPU 410 of the robot controller 50 has a ROM 430, a RAM 440, a memory 450, an interface 460, a communication interface 470, a J1 axis controller 510, a J2 axis controller 520, a J3 axis controller 530, and a J4 axis via a bus line 420.
- a control unit 540, a J5 axis control unit 550, a J6 axis control unit 560, and the like are connected.
- the ROM 430 stores a control program for executing robot operation control and data such as execution conditions.
- the RAM 440 stores a teaching program for the articulated robot 40.
- the RAM 440 is used as a working area for the CPU 410.
- the RAM 440 temporarily stores data being calculated.
- the memory 450 is composed of, for example, a hard disk or a nonvolatile semiconductor memory.
- the memory 450 stores teaching data.
- the teaching data is data that is taught to the articulated robot 40 by manual control and is read when the teaching program is executed.
- the memory 450 stores a standby position return program.
- the memory 450 corresponds to program storage means.
- the standby position return program is programmed to operate under an orthogonal coordinate system of the X axis, the Y axis, and the Z axis.
- the X-axis, Y-axis, and Z-axis orthogonal coordinate systems are orthogonal coordinate systems used in NC machine tools.
- the interface 460 is connected to the teaching box 26 used for inputting teaching data and manual control of the articulated robot 40.
- the J1 axis control unit 510 to J6 axis control unit 560 are connected to servo amplifiers 610 to 660, respectively.
- the J1 axis control unit 510 to J6 axis control unit 560 is based on the rotation control command from the CPU 410 and the current position information (current rotation angle) from the rotary encoders E1 to E6 of the J1 axis motor M1 to J6 axis motor M6.
- the feedback control of each servo amplifier is executed.
- the J1-axis motor M1 to J6-axis motor M6 are servo motors.
- the servo amplifiers 610 to 660 drive the robot hand 46 by driving the J1 axis motor M1 to J6 axis motor M6 based on commands from the J1 axis control unit 510 to J6 axis control unit 560.
- the communication interface 470 can communicate with the NC control device 20 via the communication line L.
- the standby position return program executed in the present embodiment is a program for returning the articulated robot 40 to the standby position G. As shown in FIG. 2, the standby position G is set above the end of the NC machine tool 10 facing the pallet 60.
- the standby position return program is stored in the memory 450, read by the CPU 410 at the time of activation, and stored in the RAM 440.
- the operator When returning the articulated robot 40 to the standby position, the operator operates the switch key 22c of the first operation panel 22 when working near the machine tool. On the other hand, when working near the pallet 60, the operator operates the switch key 24c of the second operation panel 24.
- a signal for starting a program is output from the first operation panel 22 or the second operation panel 24 and input to the interface 160 of the NC control device 20.
- a signal for starting the program is input to the CPU 410 of the robot control device 50 via the communication interface 170 and the communication interface 470.
- CPU 410 activates the standby position return program based on the signal for program activation.
- the CPU 410 determines whether or not all the J1 to J6 axes are in the position and orientation when the articulated robot 40 returns to the standby position G shown in FIGS. Determine whether.
- the position and orientation when the articulated robot 40 returns to the standby position G is set in advance in the program. Therefore, the CPU 410 determines whether or not all the J1 to J6 axes are in the position and orientation.
- the rotary encoders E1 to E6 detect current position information of the J1 axis motor M1 to J6 axis motor M6 at a predetermined cycle. For this reason, the CPU 410 performs the determination of S10 based on the current position information.
- the CPU 410 ends the execution of the standby position return program.
- the CPU 410 proceeds to S20.
- the CPU 410 determines whether or not the articulated robot 40 is located at the setup position based on the current position information.
- the setup generally refers to an operation for an operator to make various preparations for operating an NC machine tool system.
- an operation for exchanging the hands of an articulated robot is shown.
- the setup position is the position of the articulated robot 40 when the operator changes the hand of the articulated robot, and is different from the standby position.
- the articulated robot 40 is executed by a predetermined program or is moved by manual operation of the teaching box 26, moves to a setup position, and takes a posture for setup.
- the CPU 410 determines whether or not the articulated robot 40 is in the setup position. When the articulated robot 40 is located at the setup position, the CPU 410 performs processing of the pattern 1 programmed in S22.
- the CPU 410 gives a rotation control command to each axis motor in order to return the articulated robot 40 located at the setup position to the standby position G.
- the positions and orientations of the arms of the articulated robot 40 and the robot hand 46 located at the setup position are set in advance by a standby position return program. For this reason, the articulated robot 40 is returned to the standby position G from the position and orientation.
- the interval between the standby position G as the end point and the current position based on the current position information is divided into a plurality of sections.
- the CPU 410 controls the operation of the robot hand 46 by linear interpolation, circular interpolation or joint interpolation for each section and moves the robot hand 46 to the standby position G.
- the program of pattern 1 is set so as not to interfere with the front fence 70, the rear fence 74, and the side fence 72 when the articulated robot 40 moves in each section to the standby position G.
- the positions and orientations of the arms and the robot hand 46 when the articulated robot 40 returns to the standby position G are S32, S42, S56, S83, S84, S86, S87, S93, S94, S96, S97, which will be described later. This is the same as the position and orientation when returning to the standby position G in each process of S103, S104, S106, and S107.
- the CPU 410 determines whether or not the articulated robot 40 is in the position and posture for J2 axis refueling.
- FIG. 16 shows the J2 axis refueling posture of the articulated robot 40.
- the J2 axis is -90 degrees
- the J3 axis is +105 degrees
- the J4 axis is 0 degrees
- the J5 axis is +75 degrees
- the J6 axis is 0 degrees.
- Refueling is performed after the coordinate positions of the J2 to J6 axes are positioned at the above angle.
- the position and posture for refueling the J2 axis are changed according to the structure of each arm constituting the articulated robot 40.
- the CPU 410 gives a rotation control command to each axis motor in order to return the articulated robot 40 at the J2 axis oil supply position to the standby position G.
- the position and orientation of each arm of the articulated robot 40 and the robot hand 46 at the J2 axis refueling position are set in advance by the standby position return program. For this reason, the articulated robot 40 is returned to the standby position G from the position and orientation for the J2 axis refueling.
- the interval between the standby position G as the end point and the current position based on the current position information is divided into a plurality of sections.
- the CPU 410 controls the operation of the robot hand 46 by linear interpolation, circular interpolation or joint interpolation for each section and moves the robot hand 46 to the standby position G.
- the program of pattern 2 is set so as not to interfere with the front fence 70, the rear fence 74, and the side fence 72 when the articulated robot 40 moves in each section to the standby position G.
- the CPU 410 ends the execution of the standby position return program after the articulated robot 40 returns to the standby position G.
- the CPU 410 proceeds to S40.
- the CPU 410 determines whether or not the articulated robot 40 is in the position and posture for refueling the J5 axis and the J6 axis in FIG.
- the refueling postures of the J5 axis and the J6 axis are J2 axis ⁇ 30 degrees, J3 axis +220 degrees, J4 axis 0 degrees, J5 axis +50 degrees, and J6 axis 0 degrees.
- the description of the position and posture for refueling the J5 axis and the J6 axis is changed according to the structure of each arm constituting the articulated robot 40.
- the CPU 410 gives a rotation control command to each axis motor in order to return the articulated robot 4 at the position for J5 axis and J6 axis refueling to the standby position G.
- the positions and orientations of the arms of the articulated robot 40 and the robot hand 46 at the positions for the J5 axis and J6 axis refueling are set in advance by the standby position return program. For this reason, the articulated robot 40 returns to the standby position G from the position and orientation. In this case, the interval between the standby position G as the end point and the current position based on the current position information is divided into a plurality of sections.
- the CPU 410 controls the operation of the robot hand 46 by linear interpolation, circular interpolation or joint interpolation for each section and moves the robot hand 46 to the standby position G.
- the program of the pattern 3 is set so as not to interfere with the front fence 70, the rear fence 74, and the side fence 72 when the articulated robot 40 moves in each section to the standby position G.
- the CPU 410 ends the execution of the standby position return program after the articulated robot 40 returns to the standby position G. If the articulated robot 40 is not in the position and posture for refueling the J5 axis and the J6 axis in S40, the CPU 410 proceeds to S50.
- the CPU 410 determines whether or not the robot hand 46 of the articulated robot 40 is on this machine based on the current position information. That is, the CPU 410 determines whether or not the robot hand 46 is located in an area occupied by the NC machine tool 10 within a range along the Y-axis direction. Hereinafter, in some cases, the NC machine tool 10 is referred to as this machine.
- the articulated robot 40 travels within the range between the travel ends LE and RE of the gantry rail 30.
- the CPU 410 determines whether or not the robot hand 46 is located in an area occupied by the NC machine tool 10 within the range between the traveling ends LE and RE.
- the CPU 410 determines whether or not the robot hand 46 is positioned in the machine, that is, in the NC machine tool 10 in the Z-axis direction.
- the inside of the machine assumes a case where the robot hand 46 has entered the NC machine tool 10 in order to attach and detach the workpiece 80 to and from the chucks 10f and 10g.
- a Z-axis coordinate value that is a threshold value for determining whether or not the robot hand 46 has entered the NC machine tool 10 is input in advance.
- the CPU 410 determines that the robot hand 46 is located in the machine, and proceeds to S54. If the Z-axis coordinate value exceeds the threshold value, the CPU 410 determines that the robot hand 46 is not located in the machine, and proceeds to S56.
- the CPU 410 cannot operate in the standby position return program because the robot hand 46 is positioned in the apparatus with respect to the display device 22a of the first operation panel 22 and the display device 24a of the second operation panel 24.
- a warning that operation is necessary using the operation key is displayed.
- the CPU 410 causes the display devices 22a and 24a to display “Please use the ascending operation button”.
- the CPU 410 displays the above warning on the display devices 22a and 24a, and then ends the execution of the standby position return program.
- the operator operates the buttons 22d and 24d for the robot ascending operation on the keyboards 22b and 24b.
- the button When the button is operated, the ascending command signal is input from the first operation panel 22 to the interface 160 of the NC control device 20. Then, the ascending command signal is input to the CPU 410 of the robot controller 50 via the communication interface 170 and the communication interface 470.
- CPU 410 activates a separately prepared in-flight program based on the rise command signal.
- the in-machine lift program confirms the positions of the tool spindle unit 10h and the work spindle head 10c in the machine, and then performs the same process as the process of the standby position return program, thereby avoiding interference with the above-mentioned unit.
- the hand 46 is raised.
- the robot hand 46 is located on the NC machine tool 10 but is not in the machine, and therefore the pattern 4 is processed.
- the CPU 410 gives a rotation control command to each axis motor in order to return the articulated robot 40 located on the NC machine tool 10 to the standby position G.
- the assumed posture is extremely limited. Therefore, a plurality of routes to the standby position G, which is the end point, avoiding interference with an interference object. It can be created in advance as a section program. Then, the CPU 410 controls the operation of the robot hand 46 by linear interpolation, circular interpolation or joint interpolation for each section and moves the robot hand 46 to the standby position G.
- the program of the pattern 4 is also set so as not to interfere with the front fence 70, the rear fence 74, and the side fence 72 when the articulated robot 40 moves in each section to the standby position G. After the articulated robot 40 returns to the standby position G, the CPU 410 ends the execution of the standby position return program.
- the subsequent processing assumes a case where the articulated robot 40 is performing a handling operation on the workpiece 80 of the pallet 60.
- the CPU 410 views the current position of the robot hand 46 on the W axis and calculates the Y axis correction value.
- the W axis is a rotation axis around the X axis.
- the robot hand 46 includes a loading hand 46b and an unloading hand 46c.
- the robot hand 46 switches the hand to be used by rotating 180 degrees around the J6 axis. Also, when reading the position of the robot hand 46 written in the program or instructing the position of the robot hand 46, it is switched by selecting the tool coordinate system to which hand is instructed. It is done. Specifically, there are two types of tool coordinate systems, a loading hand coordinate system and an unloading coordinate system. When the current position of the robot hand 46 is read in the loading hand coordinate system, the coordinate value of the reference portion 47 of the loading hand 46b is obtained. When read in the unloading coordinate system, the coordinate value of the reference portion 47 of the unloading hand 46c is shown.
- the robot hand 46 does not perform loading or unloading, but instructs the robot hand 46 to return to the standby position. For this reason, the position of the robot hand 46 is read or the position of the robot hand 46 is instructed using a loading hand coordinate system. Therefore, in this specification, when expressed as the current position or coordinate value of the robot hand 46, all values are in the loading hand coordinate system. However, the angle of the J6 axis of the robot hand 46 when the standby position return program operates is undecided. For this reason, it is not possible to calculate the distance between the robot hand 46 and the interfering object using the read coordinate values as they are.
- the robot hand 46 and the interference object when calculating the distance in the X-axis direction only by the X-axis coordinate value, the distance in the Y-axis direction only by the Y-axis coordinate value, and the distance in the Z-axis direction only by the Z-axis coordinate value, the robot hand 46 and the interference object The correct distance between them cannot be obtained. If there is a sufficient distance between the robot hand 46 and the interfering object, the interference between the robot hand 46 and the interfering object is determined by securing a clearance that allows the robot hand 46 to rotate 360 degrees around the J6 axis. Can do. However, when there is no allowance for the distance between the robot hand 46 and the interfering object, the Y axis correction is performed and the interference determination in the Y axis direction is performed.
- the W-axis coordinate value of the robot hand 46 is a vector having a center point of a perfect circle drawn by the reference part 47 when the robot hand 46 is turned 360 degrees on the J6 axis as a base point and a coordinate of the reference part 47 as an end point. It means the rotation angle around the X axis. Based on the W-axis coordinate value, it is possible to roughly determine whether the loading hand 46b is upward, downward, rightward, or leftward. Then, the Y-axis coordinate value of the reference portion 47 when the loading hand 46 is turned to the left by rotating only the J6 axis while maintaining the robot in this posture is calculated. The error between the coordinate value calculated in this way and the current Y-axis coordinate value is stored as a Y-axis correction value, and is used for the subsequent interference determination.
- the CPU 410 determines whether or not the robot hand 46 is located in the vicinity of the rear fence 74 on the X-axis in S70. That is, the CPU 410 determines whether or not the robot fence 46 does not interfere with the rear fence 74 even if the robot hand 46 is turned around the J4 axis to the J6 axis in the current X axis coordinate value where the robot hand 46 is located.
- the CPU 410 When the X-axis coordinate value of the robot hand 46 is closer to the rear fence 74 than the determination X-axis coordinate value stored in the memory 450 in advance, the CPU 410 is located near the rear fence, and the J4 axis to J6 When the robot hand 46 is turned around the axis, it is determined that there is a possibility of interference with the rear fence 74.
- the CPU 410 determines that the robot hand 46 is positioned in the vicinity of the rear fence 74 in the X-axis direction, the CPU 410 moves J2 to the position in the X-axis direction that does not interfere with the rear fence 74 even if the robot hand 46 is turned in S72. Any one of the axis, the J3 axis, and the J5 axis is turned and moved. At this time, which of the J2 axis, the J3 axis, and the J5 axis to move or which axis to move in combination may be appropriately combined.
- the CPU 410 proceeds to S80 after performing the process of S72 or when determining in S70 that the robot hand 46 is not positioned in the vicinity of the rear fence 74 in the X-axis direction.
- the CPU 410 determines the position of the robot hand 46 in the Y axis based on a value obtained by adding the Y axis correction value calculated in S60 to the Y axis coordinate value (hereinafter referred to as “corrected Y axis coordinate value”). Is determined to be near the machine.
- This determination process includes a determination process for determining whether or not the corrected Y-axis coordinate value is closer to the apparatus than the apparatus vicinity determination threshold value HS1 stored in the memory 450 in advance. If the corrected Y-axis coordinate value is closer to the machine than the machine vicinity determination threshold HS1, the CPU 410 determines that the position of the robot hand 46 is near the machine.
- the machine vicinity determination threshold HS1 is a coordinate value for determination on the Y axis. If the CPU 410 determines that the position of the robot hand 46 is close to the machine, the CPU 410 proceeds to S81. If the CPU 410 determines that the position of the robot hand 46 is not close to the machine, the CPU 410 proceeds to S90.
- the CPU 410 determines whether or not the position of the robot hand 46 is near the front fence 70 in the X-axis direction based on the current position information.
- This determination process includes a determination process of whether or not the X-axis coordinate value is closer to the front fence 70 than the front fence vicinity determination threshold value MS1 stored in the memory 450 in advance.
- the CPU 410 determines that the current position of the robot hand 46 is close to the front fence 70.
- the front fence vicinity determination threshold MS1 is a coordinate value for determination on the X axis.
- the CPU 410 proceeds to S82.
- the CPU 410 determines whether the position of the robot hand 46 is near the pallet 60 in the Z-axis direction based on the current position information. This determination process includes a determination process as to whether or not the Z-axis coordinate value is closer to the pallet 60 than the pallet vicinity determination threshold value PS1 stored in the memory 450 in advance. The CPU 410 determines that the current position of the robot hand 46 is near the pallet 60 when the current Z-axis coordinate value is closer to the pallet 60 than the pallet vicinity determination threshold PS1.
- the palette proximity determination threshold PS1 is a coordinate value for determining the position in the Z-axis direction.
- the pallet vicinity determination threshold PS1 is a value that considers the case where the workpiece 80 is on the pallet 60, and is a value at which the robot hand 46 does not interfere with the workpiece 80.
- the CPU 410 proceeds to S83.
- the CPU 410 performs the return process of pattern 5, moves the articulated robot 40 to the standby position G, and then ends this flowchart.
- the CPU 410 proceeds to S84. Then, the CPU 410 ends the flowchart after moving the articulated robot 40 to the standby position G after performing the return processing of the pattern 6.
- the CPU 410 proceeds to S85.
- the process of S85 is the same as that of S82. If it is determined in S85 that the Z-axis coordinate value of the robot hand 46 is near the pallet, the CPU 410 moves to S86. Then, the CPU 410 ends the flowchart after performing the restoration process of the pattern 7. If it is determined in S85 that the Z-axis coordinate value of the robot hand 46 is not near the pallet, the CPU 410 proceeds to S87. Then, the CPU 410 ends the flowchart after performing the restoration process of the pattern 8.
- the CPU 410 determines whether or not the position of the robot hand 46 is in the vicinity of the traveling end RE on the Y axis based on the current position information. This determination process is a determination process of whether or not the corrected Y-axis coordinate value is closer to the travel end RE than the travel end vicinity determination threshold HS2 stored in the memory 450 in advance.
- the CPU 410 determines that the position of the robot hand 46 is close to the travel end RE. That is, the CPU 410 determines “YES”.
- the running end vicinity determination threshold HS2 is a coordinate value for determination on the Y axis.
- the CPU 410 determines “YES” in S91 and “YES” in S92, it performs the process of pattern 9 in S93, and then ends this flowchart. If the CPU 410 determines “NO” in S92, it performs the process of the pattern 10 in S94, and then ends this flowchart. On the other hand, if the CPU 410 determines “NO” in S91 and determines “YES” in S95, it performs the process of the pattern 11 in S96, and then ends this flowchart. If the CPU 410 determines “NO” in S95, it performs the process of pattern 12 in S97, and then ends this flowchart.
- the CPU 410 determines “YES” in S101 and “YES” in S102, the CPU 410 performs the process of the pattern 13 in S103, and then ends this flowchart. If the CPU 410 determines “NO” in S102, it performs the process of the pattern 14 in S104, and then ends this flowchart. On the other hand, if the CPU 410 determines “NO” in S101 and “YES” in S105, the CPU 410 performs the process of the pattern 15 in S106, and then ends this flowchart. If the CPU 410 determines “NO” in S105, it performs the process of the pattern 16 in S107, and then ends this flowchart.
- FIGS. 13A and 13B show the position of the robot hand 46 as determined in the processing of S80, S81, S82, S85, S90, S91, S92, S95, S101, S102, and S105. The description will be given with reference.
- FIGS. 13A and 13B the position of the robot hand 46 to be processed in the processing of the patterns 5 to 16 is indicated by P with a pattern number.
- FIG. 13A shows the respective areas divided by the machine vicinity determination threshold value HS1, the traveling end vicinity determination threshold value HS2, and the front fence vicinity determination threshold value MS1.
- FIG. 13B shows the respective areas divided by the machine vicinity determination threshold value HS1, the travel end vicinity determination threshold value HS2, and the pallet vicinity determination threshold value PS1.
- patterns 5 to 16 are all processing items of singularity check, J5 axis check, interference angle check, axis movement, interference avoidance check, and standby position return, or a combination of some processing items. Consists of. First, a flowchart of the process of pattern 5 in which all process items are combined will be described with reference to FIG. The other patterns 6 to 16 will be described in comparison with items performed in the pattern 5 process.
- the CPU 410 sequentially performs a singularity check, J5 axis check, interference angle check, axis movement, interference avoidance check, and standby position return process.
- the CPU 410 determines whether or not the posture of the J6 axis unit 45 is not in the vicinity of the singular point based on the current rotation angle of the J5 axis. Specifically, it is confirmed whether the value of the J5 axis is in the range of ⁇ 5 degrees to +5 degrees. If the posture of the J6 axis unit 45 is not near the singular point, the CPU 410 proceeds to the next S202. When the CPU 410 determines that the posture of the J6 axis unit 45 is in the vicinity of the singular point, the CPU 410 rotates the J5 axis so as to be separated from the vicinity of the singular point in S201. After correcting the angle of the J5 axis in this way, the CPU 410 proceeds to S202.
- the CPU 410 determines whether or not the current position of the robot hand 46 is in the vicinity of the singular point, and prevents it from being positioned at the singular point by the subsequent operation.
- the CPU 410 looks at the J5 axis, which is the wrist angle of the robot hand 46, and even if the robot hand 46 rotates the wrist, specifically the J4 and J6 axes, The coordinate value of the Z axis that does not interfere with the pallet 60 is calculated.
- the CPU 410 stores the calculated Z-axis coordinate value in the RAM 440 for later use.
- the next interference angle check it is determined whether or not the members constituting the articulated robot 40 interfere with each other. Specifically, when the J2 axis arm 42 and the J3 axis arm 44 approach each other, it is likely to interfere with the subsequent operation.
- the CPU 410 determines whether the angle (interference angle) formed by the J2 axis arm 42 and the J3 axis arm 44 is equal to or less than the interference angle threshold value. To do. Then, the CPU 410 determines that there is a possibility of interference if the interference angle is equal to or smaller than the interference angle threshold, and proceeds to S205. In S205, the CPU 410 drives the J2 axis motor M2, and moves the J2 axis so that the interference angle exceeds the interference angle threshold.
- the CPU 410 may drive the J3 axis motor M3 instead of the J2 axis motor M2 to rotate the J3 axis casing 43 so that the interference angle exceeds the interference angle threshold. If the interference angle is not equal to or smaller than the interference angle threshold in S204, the CPU 410 proceeds to S206.
- the axis movement in S206 is a process for moving the robot hand 46 to an intermediate position between the current position and the standby position G.
- the setting of the intermediate position will be described.
- the robot hand 46 is located in the vicinity of at least one of the front fence 70, the pallet 60, the traveling end RE, and the machine, a position that is a predetermined distance away from them is set as an intermediate position.
- a value obtained by further adding a predetermined value to the X-axis coordinate value of the current position of the robot hand 46 becomes the X-axis coordinate value of the intermediate position.
- the predetermined value added to the X-axis coordinate value is a value that can be determined as “NO” when it is determined by the front fence vicinity determination threshold value MS1 in S81.
- the Y-axis coordinate value and the Z-axis coordinate value of the intermediate position are the corrected Y-axis coordinate value and Z-axis coordinate value of the current position of the robot hand 46.
- the X-axis coordinate value and the Y-axis coordinate value of the intermediate position are the X-axis coordinate value of the current position of the robot hand 46 and the corrected Y-axis coordinate value.
- the CPU 410 sets the value calculated by the J5 axis check as the Z-axis coordinate value at the intermediate position.
- the X-axis coordinate value and the Z-axis coordinate value of the intermediate position are the X-axis coordinate value and the Z-axis coordinate value of the current position of the robot hand 46, respectively.
- the Y-axis coordinate value of the intermediate position is a value obtained by adding a predetermined value to the corrected Y-axis coordinate value of the robot hand 46.
- the predetermined value added to the corrected Y-axis coordinate value is a value that can be determined as “NO” when determined by the machine vicinity determination threshold HS1 in S80. Alternatively, it is a value that can be determined as “NO” when it is determined at the running end vicinity determination threshold HS2 in S90.
- the coordinate value of the current position of the robot hand 46 is directly adopted as the coordinate value of the intermediate position.
- the value calculated by the J5 axis check is set as the Z-axis coordinate value of the intermediate position.
- the current position of the robot hand 46 becomes the coordinate value of the intermediate position, and as a result, the CPU 410 does not move to the intermediate position.
- the CPU 410 controls the robot hand 46 so as to move the robot hand 46 from the current position to the intermediate position in the axis movement of S206.
- the intermediate position is set when it can interfere with any of the interferers. For this reason, the movement to the intermediate position is controlled by linear interpolation.
- next interference avoidance check whether or not the robot hand 46 may interfere with the front fence 70 when the articulated robot 40 is moved from the state where the robot hand 46 is located at the intermediate position to the standby position G by joint interpolation. Is checked.
- the CPU 410 performs an interference avoidance check in S208 based on the comparison between the Z-axis coordinate value of the intermediate position and the determination threshold value on the Z-axis.
- the determination threshold is a value obtained from a test value or the like, and is stored in the memory 450.
- FIG. 15 illustrates a case where joint interpolation is performed on the J2 axis and the J3 axis before the multi-joint robot 40 returns from the intermediate position C to the standby position G when the Z-axis coordinate value of the intermediate position C is equal to or less than the determination threshold.
- the movement locus of the articulated robot 40 is shown.
- the robot hand 46 comes out of the front fence 70 and interferes with the front fence 70.
- the robot hand 46 may interfere with the front fence 70 because the movement range by joint interpolation of the J2 axis and J3 axis is large. Assuming such a case, it is necessary to move the robot hand 46 to an interference avoidance point K described later.
- rotation angle is J2 axis +63 degrees, J3 axis +149 degrees, J4 axis 0 degrees, J5 axis +31 degrees, J6 axis 0 It is the posture when it is a degree. For this reason, in joint interpolation for movement to a standby position in S210, which will be described later, the rotation angle of each axis is controlled from the current rotation angle with the rotation angle at the standby position G as a target.
- the CPU 410 moves to S209, moves the robot hand 46 to the interference avoidance point K, and then returns to the standby position in S210. Move on to processing.
- the interference avoidance point K is located above the intermediate position C on the Z axis, and does not interfere with the front fence 70 when the articulated robot 40 is moved from the interference avoidance point K to the standby position G by joint interpolation. Position.
- FIG. 14 shows the movement trajectory of the articulated robot 40 when joint interpolation is performed on the J2 axis and the J3 axis before the articulated robot 40 returns from the interference avoidance point K to the standby position G.
- the robot hand 46 moves upward along the Z axis without interfering with the front fence 70. That is, since the interference avoidance point K is located above the determination threshold on the Z axis, the movement trajectory of the J2 axis and the J3 axis becomes narrow, and the robot hand 46 does not interfere with the front fence 70.
- the CPU 410 returns the articulated robot 40 from the intermediate position C or the interference avoidance point K to the standby position G by joint interpolation.
- the J5 axis check is omitted, and processing items of singularity check, interference angle check, axis movement, interference avoidance check, and standby position return are performed. Since the J5 axis check is omitted in Pattern 6, Pattern 10, and Pattern 14, in the flowchart of Pattern 6, Pattern 10, and Pattern 14, S200 is “NO” in the flowchart of FIG. Proceeds to S204.
- Pattern 6, Pattern 10, and Pattern 14 are cases where the robot hand 46 is positioned above the pallet vicinity determination threshold PS1, as shown in FIG. 13B.
- the robot hand 46 has a sufficient height so that the robot hand 46 does not interfere with the pallet 60 even when the wrist is rotated by looking at the J5 axis that is the angle of the wrist of the robot hand 46. For this reason, in the pattern 6, the pattern 10, and the pattern 14, the J5 axis check is omitted.
- the flowchart of the pattern 7, the pattern 11, and the pattern 15 is the same as the flowchart of FIG.
- the singular point check, the J5 axis check, and the interference angle check are omitted, and processing items of axis movement, interference avoidance check, and standby position return are performed.
- the singular point check is omitted.
- the robot hand 46 is positioned above the pallet vicinity determination threshold PS1. That is, the robot hand 46 has a height sufficient to prevent the robot hand 46 from interfering with the pallet 60 even when the wrist is rotated by looking at the J5 axis which is the wrist angle of the robot hand 46. For this reason, the J5 axis check is omitted. Further, in the patterns 8 and 12, there is no possibility that the members interfere with each other before returning from the current position to the standby position G. For this reason, the interference angle check is omitted.
- the singular point check, the J5 axis check, the interference angle check, and the axis movement are omitted, and the processing items of the interference avoidance check and the standby position return are performed.
- the reason why the singular point check, the J5 axis check, and the interference angle check are omitted in the pattern 16 is the same reason as in the patterns 8 and 12.
- the current position is the intermediate position C because it is not located in the vicinity of all the interfering objects, and the axis movement from the pattern 5 to the pattern 15 is performed. This is the same state as when completed. For this reason, in the pattern 16, the axial movement is omitted. Therefore, in the pattern 16, it is only necessary to perform the interference avoidance check and the standby position return.
- a movement path is selected according to the position and orientation of the articulated robot 40 when the switch key 22c is turned on, and along the selected movement path. Then, the robot hand 46 is controlled to move to the standby position G. Patterns 1 to 16 are programmed in each program corresponding to the selected movement route.
- the first operation panel 22 and the second operation panel 24 of the NC machine tool system are provided with switch keys 22c and 24c for operating the articulated robot 40 by executing the standby position return program stored in the memory 450. For this reason, if the operator turns on the switch keys 22c and 24c of the first operation panel 22 and the second operation panel 24, the standby position return program is executed and the articulated robot 40 operates. Thereby, even the worker who operates the articulated robot 40 for the first time can operate it safely.
- the standby position return program is programmed to operate under the orthogonal coordinate system used in the NC machine tool 10. For this reason, the articulated robot 40 can be operated under the orthogonal coordinate system used in the NC machine tool 10. For this reason, it is easy for an operator accustomed to the operation of the NC machine tool 10 to understand the operation of the articulated robot 40.
- the standby position return program is programmed as follows. That is, the standby position G (target position and orientation) of the articulated robot 40 is set, and the switch keys 22c and 24c are turned on when the articulated robot 40 moves to the standby position G (target position and orientation).
- the movement path is selected according to the position and orientation of the multi-joint robot 40 at the time, and the multi-joint robot 40 is moved along the selected movement path.
- the robot control device 50 controls the articulated robot 40 according to a program. Therefore, the operator does not need to operate the articulated robot 40 according to the position and orientation of the articulated robot 40.
- the pallet 60 of the workpiece 80 is disposed on the side of the NC machine tool 10.
- the multi-joint robot 40 can move between the NC machine tool 10 and the pallet 60.
- the pallet 60 and the NC machine tool 10 are surrounded by a front fence 70, a side fence 72, and a rear fence 74 (safety fence).
- the standby position return program the standby position G (target position / posture) of the articulated robot 40 is set.
- the standby position return program is programmed so that the articulated robot 40 moves along a movement path selected according to the position and orientation of the articulated robot 40 when the switch keys 22c and 24c are turned on. .
- the articulated robot 40 is moved to the standby position G (target position / posture) while avoiding interference with the front fence 70, the side fence 72, and the rear fence 74 (safety fence). It is also programmed.
- the robot control device 50 controls the articulated robot 40 according to the standby position return program. For this reason, when the standby position return program is executed, the movement path is selected according to the position and orientation of the articulated robot 40 when the switch keys 22c and 24c are turned on, and the front fence 70 (safety fence) is connected.
- the articulated robot 40 can be moved to the standby position G (target position / posture) while avoiding interference. This eliminates the need for the operator to operate the articulated robot so as not to interfere with the front fence 70 (safety fence) according to the position and orientation of the articulated robot 40.
- the NC machine tool 10 is provided with a first operation panel 22, and the pallet 60 is provided with a second operation panel 24.
- the operation panels 22 and 24 are respectively provided with switch keys 22c and 24c for executing a standby position return program. Therefore, when the articulated robot 40 is located near the pallet 60, the standby position return program can be executed by turning on the switch key 24c of the second operation panel 24. On the other hand, when the articulated robot 40 is located near the NC machine tool 10, the program can be executed by operating the first operation panel 22. For this reason, depending on whether the articulated robot 40 is located in the vicinity of either the pallet 60 or the NC machine tool 10, the operator can switch the switch means of the operation panel closer to the pallet 60 or the NC machine tool 10. Can be operated. Thereby, a common program for operating the articulated robot 40 is executed.
- the pallet 60 is arranged on the right side of the NC machine tool 10, but the pallet 60 may be arranged on the left side of the NC machine tool 10.
- the articulated robot 40 may be a 6-axis articulated robot, replacing the J1 axis, which is the traveling axis, with the turning axis.
- the articulated robot 40 may be an articulated robot having 7 or more axes other than the 6-axis robot.
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Abstract
Description
ロボットハンド46がパレット60に干渉しないZ軸の座標値を算出する。CPU410は、算出したZ軸の座標値を後で使用するため、RAM440に記憶する。次の干渉角チェックでは、多関節ロボット40を構成する部材同士が干渉するか否かを判定する。具体的には、J2軸アーム42とJ3軸アーム44とが接近したとき、その後の動作によって干渉し易い。
Claims (4)
- NC工作機械と、前記NC工作機械用の操作盤と、前記NC工作機械の上方に配置された多関節ロボットと、前記多関節ロボットを動作させるためのプログラムを記憶するプログラム記憶手段と、前記プログラムに従って前記多関節ロボットを制御するロボット制御装置とを備えたNC工作機械システムにおいて、
前記操作盤には、前記プログラム記憶手段に記憶したプログラムを実行して前記多関節ロボットを動作させるスイッチ手段が設けられ、
前記プログラムは、前記多関節ロボットの目標位置姿勢が設定されると共に、前記スイッチ手段がオン操作されたときの前記多関節ロボットの位置姿勢に応じて移動経路が選択され、その選択された移動経路に沿って前記目標位置姿勢を取るよう前記多関節ロボットを移動させるようにプログラミングされ、
前記ロボット制御装置は、前記プログラムに従って前記多関節ロボットを制御することを特徴とするNC工作機械システム。 - 前記NC工作機械の側部には、ワークのパレットが配置され、
前記多関節ロボットは、前記NC工作機械と前記パレットとの間を移動可能であり、
前記パレット及び前記NC工作機械の周囲は安全柵で囲われ、
前記プログラムは、前記多関節ロボットの目標位置姿勢が設定されると共に、前記スイッチ手段がオン操作されたときの前記多関節ロボットの位置姿勢に応じて移動経路が選択され、その選択された移動経路に沿って前記安全柵との干渉を回避しながら前記目標位置姿勢を取るよう前記多関節ロボットを移動させるようにプログラミングされ、
前記ロボット制御装置は、前記プログラムに従って前記多関節ロボットを制御することを特徴とする請求項1に記載のNC工作機械システム。 - 前記操作盤は、前記NC工作機械付近に配置された第1操作盤と、前記パレット付近に配置された第2操作盤とを含み、
前記第1及び第2操作盤のそれぞれには、前記プログラムを実行するために操作される前記スイッチ手段が設けられていることを特徴とする請求項1又は請求項2に記載のNC工作機械システム。 - 前記プログラムは、前記NC工作機械で使用される直交座標系の下でプログラミングされていることを特徴とする請求項1乃至請求項3のうちいずれか1項に記載のNC工作機械システム。
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EP11869764.8A EP2666598B1 (en) | 2011-08-24 | 2011-08-24 | Nc machine tool system |
US13/814,455 US8694160B2 (en) | 2011-08-24 | 2011-08-24 | NC machine tool system |
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